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46 results on '"Sheet metal parts"'

1. Automated retrieval and comparison of sheet metal parts.

Author: Yang, Yang, Hinduja, Srichand, and Owodunni, Oladele O
Subjects: SHEET metal, ENGINEERING design, DATABASES, INFORMATION design, C++
Abstract: With the number of 3D CAD models increasing rapidly, retrieving models of similar parts has become an important activity as existing designs may contain vital information regarding design and manufacturing. This paper is targeted at retrieving and comparing sheet metal parts. In the method proposed herein, the general shape of a sheet metal part is represented by a simplified hierarchical tree wherein the nodes represent the planar walls of the part and feature-related information is attached to these nodes as textual attributes. A shape index is derived from this simplified tree and subsequently used to retrieve similar parts from the database. The retrieved parts are assessed for their similarity with the enquiry part using five criteria: the general shape of the part, bends and their direction, feature types, feature location and feature size. In addition to determining the degree of similarity, the main advantage of the proposed method is that the assessment provides useful feedback to design and manufacturing engineers based on these five criteria. A prototype system developed in C++ has been tested on a database containing a few hundred parts and the effectiveness of the proposed method in retrieving and comparing the parts is discussed. [ABSTRACT FROM AUTHOR]
Published: 2023
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2. Path planing for robotic polishing of sheet metal parts.

Author: Liu, Yuezhi, Xi, Fengfeng, and Faieghi, Reza
Subjects: *SHEET metal, *GRINDING & polishing, *ROBOTICS, *DIFFERENTIAL geometry, *METALLIC surfaces, *LEANNESS
Abstract: Sheet metal parts with high-quality surface have wide applications in many manufacturing procedures. However, polishing these parts are challenging due to occurrence of deformations at contact area between the polishing tool and part. This stems from the thinness of these parts, making them susceptible to deformations, compared to thick solid parts. To address the above challenge, this study proposes a new robotic polishing path planing method that accounts for such deformations. The proposed method starts by estimating the contact area between the tool head, and the free-form surface of the sheet metal part is estimated using Hertz theory and differential geometry. Next, it uses a polynomial equation—that is derived from FEM-based contact analysis of the part—to calculate the true tool-part contact area under deformations. Then, it combines the contact-area information with a new constant speed robot path planing technique to ensure high-quality robot polishing. Numerical studies on several sample geometries verify the effectiveness of the method. [ABSTRACT FROM AUTHOR]
Published: 2022
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3. Design of Osculum Type Pneumatic Unloading Manipulator Based on PLC Control

Author: Li, Chengxiang, Wang, Bin, Zhang, Yaolei, Li, Haiyan, Wen, Juying, Kacprzyk, Janusz, Series Editor, Pal, Nikhil R., Advisory Editor, Bello Perez, Rafael, Advisory Editor, Corchado, Emilio S., Advisory Editor, Hagras, Hani, Advisory Editor, Kóczy, László T., Advisory Editor, Kreinovich, Vladik, Advisory Editor, Lin, Chin-Teng, Advisory Editor, Lu, Jie, Advisory Editor, Melin, Patricia, Advisory Editor, Nedjah, Nadia, Advisory Editor, Nguyen, Ngoc Thanh, Advisory Editor, Wang, Jun, Advisory Editor, Deng, Kevin, editor, Yu, Zhengtao, editor, Patnaik, Srikanta, editor, and Wang, John, editor
Published: 2019
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4. 焊枪头与飯金件空间间隙的自动检查.

Author: 董玉德, 吴文哲, 陈健, 吴海江, and 邹文俊
Subjects: SPOT welding, SHEET metal, WELDING, WELDED joints, METALLIC surfaces, SHEET metal work
Abstract: Copyright of China Mechanical Engineering is the property of Editorial Board of China Mechanical Engineering and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Published: 2021
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5. Fixture layout optimisation based on a non-domination sorting social radiation algorithm for auto-body parts.

Author: Xing, Yanfeng, Hu, Min, Zeng, He, and Wang, Yansong
Subjects: AUTOMOBILE bodies, PRODUCTION engineering, INDUSTRIAL efficiency, AUTOMOTIVE engineering, MANUFACTURING processes, SHEET metal, ASSEMBLY line methods, WELDING
Abstract: Auto-body compliant parts are easily deformed during clamping and welding, and fixture layout is very important to the final product quality. However, it is very difficult to design fixture layout because it needs to synchronously satisfy the requirements of assembly tolerance and gravity deformation, which are calculated by finite element analysis. This paper proposes a new method to optimise fixture scheme by a non-domination sorting social radiation algorithm (NSSRA). Firstly, unfeasible nodes are eliminated by four rules according to manufacturing experiences. Afterwards, a few groups are divided based on positions of all feasible nodes.Ngroups are optimised using NSSRA. Finally, the best fixture layout is generated by selecting the feasible points among the optimal groups in last step. A case study of inner hood is used to illustrate the proposed method, and the results suggest that NSSRA has better efficiency and higher accuracy than NSGA-II. [ABSTRACT FROM AUTHOR]
Published: 2015
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6. Calculating the gravity-free shape of sheet metal parts.

Author: Claus, Felix, Hagen, Hans, and Hamann, Bernd
Subjects: *SHEET metal, *OPTICAL measurements, *REVERSE engineering, *SIMULATION methods & models, *PROBLEM solving, *SHEET metal work
Abstract: This paper presents an iterative finite element (FE)–based method to calculate the gravity-free shape of nonrigid parts from an optical measurement performed on a non-over-constrained fixture. Measuring these kinds of parts in a stress-free state is almost impossible because deflections caused by their weight occur. To solve this problem, a simulation model of the measurement is created using available methods of reverse engineering. Then, an iterative algorithm calculates the gravity-free shape. The approach does not require a CAD model of the measured part, implying the whole part can be fully scanned. The application of this method mainly addresses thin, unstable sheet metal parts, like those commonly used in the automotive or aerospace industry. To show the performance of the proposed method, validations with simulation and experimental data are presented. The shown results meet the predefined quality goal to predict shapes within a tolerance of ± 0.05 mm measured in surface normal direction. [ABSTRACT FROM AUTHOR]
Published: 2021
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7. Investigation of bending and welding process focusing on unfolded pattern of sheet metal parts for machine tools and Improvement of their quality with a laser welding robot

Author: Yohei, Yamaguchi, Toshiki, Hirogaki, and Eiichi, Aoyama
Subjects: machine tools, welding, 生産システム, レーザ溶接ロボット, 工作機械, 板金部品, 曲げ, sheet metal parts, 溶接, bending, 566.5, manufacturing system, laser welding robot
Abstract: 工作機械には一層の高機能化が求められてきており，その板金部品の重要性も増大してきている．しかしながら，その板金部品の設計，機能性，生産技術に対する体系的な研究はなされていない．したがって，工作機械分野において，その板金部品の新しい設計および生産技術の考察を遂行する．最初に，3DCAD情報に基づき，その展開図の特徴を評価する．その結果，3次元板金部品の生産にために新しい溶接技術が必要であることが明らかになった．次に，レーザ溶接ロボットに着目する．その理由は現場の熟練技能に依存することなく，複雑形状の板金部品の製造を可能にするためである．最後に，ハブラニアンプロットをレーザ溶接条件に用い，レーザ溶接ロボットにより工作機械の板金部品の製造品質を改善できることを示す．, As machine tools are required to have higher performance and more functionalities, the importance of sheet metalparts has been increasing. However, the design, functionality, and manufacturing technology of sheet metal parts ofmachine tools have almost never been systematically studied. Therefore, we investigate a new design and productionsystem for sheet metal parts in the machine tools fields. First, we estimate features in unfolded pattern of sheet metalparts for machine tools, based on analyzing 3DCAD information. As a result, a novel welding technology is found to berequired to construct the production system for three dimensional sheet metal parts. Second, we focus on fiber laserwelding robot, which is installed to competitively manufacture sheet metal parts without relying on tacit knowledge ofskilled operators. Finally, Hablanian plot is used to identify optimum welding conditions and it is demonstrated thatlaser welding robot system makes it feasible to improve the quality of sheet metal parts for machine tools.
Published: 2023

8. Multi-objective optimization of auto-body fixture layout based on an ant colony algorithm.

Author: Khodabandeh, Milad, Saryazdi, Maryam Ghassabzadeh, and Ohadi, Abdolreza
Abstract: Fixtures are extensively used in many industries such as the car industry, to locate and constrain the sheet part during the assembly stage. Fixture layout affects on deformation of sheet parts. Therefore, fixture layout optimization is crucial to the accuracy and quality of products. In addition, the number of clamps that uses in the fixture is another important factor that must be considered in fixture design. This article presents a novel fixture layout optimization method by combining multi-objective ant colony algorithm (M-ACO) and the finite element method. The proposed method optimizes the fixture layout and the number of clamps simultaneously as a multi-objective problem. An approximation of Pareto frontier is acquired by the proposed method. The fixture layout for the side reinforcement of a car is optimized using the proposed method. The results show that the proposed approach performs effectively to optimize the auto-body fixture layout. [ABSTRACT FROM AUTHOR]
Published: 2020
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9. A staged approach for feature extraction from sheet metal part models.

Author: Zhang, W. Z., Wang, G. X., Lu, C., and Nee, A. Y. C.
Subjects: SHEET metal working machinery, MODELS & modelmaking, MANUFACTURED products, FACTORIES, DIES (Metalworking)
Abstract: This paper proposes a staged approach of feature identification and extraction for sheet metal parts from a solid model. The identification and extraction process is divided into several stages. Each stage is automatically processed and the results after each stage can be interactively corrected and modified for the next stage. With this approach, the features of sheet metal parts can be automatically extracted from their well-defined solid models. At the same time, for ill-defined or inaccurate solid models of sheet metal parts, their features can be extracted through certain user interaction at a suitable stage. An attribute is also introduced in the paper to measure the relationship between sheet surfaces and other surfaces, and simplify the identification process. The approach has been implemented in the AutoCAD® environment and used by an industrial collaborator for the design of progressive dies. [ABSTRACT FROM AUTHOR]
Published: 2007
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10. 钣金零部件自动化焊接工作站的建模与仿真.

Author: 刘海燕, 苏宇, and 翟昌林
Abstract: Copyright of Experimental Technology & Management is the property of Experimental Technology & Management Editorial Office and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Published: 2019
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11. Hierarchical representation and similarity assessment for reuse of sheet metal parts.

Author: Li, Zhi, Zhou, Xionghui, and Liu, Wei
Abstract: Sheet metal parts are widely used in the manufacturing industry. With the number of 3D models increasing, it is essential to retrieve existing resources. Effective similarity assessment would be useful in many downstream applications, such as design reuse and manufacture process revision. We propose a hierarchical representation and similarity assessment algorithm to retrieve 3D models of sheet metal parts. Based on single-side representation extracted from solid models, flat and bent faces are recognized and clustered into groups. The morphological relationship between these two groups is then described and an attributed graph is built to store the connection between flat groups. A hierarchical representation is derived by a simplification and assembly process. This structure supports similarity assessment in different levels of detail; thus, a multiple-resolution formula is introduced to measure the total similarity. The algorithms were implemented based on a neutral standard for the exchange of product model data (STEP) format and a prototype demonstrates the application in shape search and reuse in manufacturing industry. [ABSTRACT FROM AUTHOR]
Published: 2018
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12. A new assembly variation analysis model based on the method of power balance for auto-body parts

Author: Xing, Yanfeng and Wang, Yansong
Published: 2014
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13. An analysis of grasp quality measures for the application of sheet metal parts grasping.

Author: Sintov, Avishai and Shapiro, Amir
Subjects: SHEET metal, ALGORITHMS, COMPUTATIONAL complexity, STRAINS & stresses (Mechanics), STANDARD deviations
Abstract: Acquiring a qualitative force-closure grasp requires the determination of feasible contact points on the object based on a defined criterion. The determination must be fast in order to implement feasible synthesis algorithms. Moreover, grasping of sheet metal parts has further requirements derived from its geometry and clamping tools. This paper presents a grasp quality analysis for the application of sheet metal parts. Moreover, a novel grasp quality measure approach is proposed based on standard deviation computation of the contact's coordinates. The proposed measure is frame invariant, simple to implement, and has low computational complexity. A comparative analysis over other measures is presented. Further, a stress analysis was performed to show that the proposed criterion yields low stress on the sheet metal part compared to other criteria. Simulations show advantage to grasp synthesis with the proposed quality measure. [ABSTRACT FROM AUTHOR]
Published: 2017
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14. Sensor planning system for fringe projection scanning of sheet metal parts.

Author: Koutecký, T., Paloušek, D., and Brandejs, J.
Subjects: *SHEET metal, *STRUCTURAL plates, *SCANNING systems, *POLYGONS, *REFLECTANCE
Abstract: Automatic sensor planning for 3D scanning with structured light scanners is a challenging task. That is true especially in the case of reflective surfaces that are typical for sheet metal parts. This paper describes a new sensor planning system for the automatic generation of scanning positions based on a computer model of the part for digitization of sheet metal parts. Compared to previous studies, visual properties of the scanned parts’ surface can be simulated precisely by application of a reflectance model proposed by Nayar and simplified by Ellenrieder. This model is suitable for materials that are characterized by the combination of diffuse and specular reflections. Results of the scanning that were obtained using an ATOS III Triple Scan fringe projection 3D scanner and a KUKA KR 60 HA industrial robot were compared to the simulation. Results obtained for two test parts show 16 and 26% differences in correspondence of acquired polygonal areas between simulation and scanning. [ABSTRACT FROM AUTHOR]
Published: 2016
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15. An expert system for process planning of sheet metal parts produced on compound die for use in stamping industries.

Author: Salunkhe, Sachin, Panghal, Deepak, Kumar, Shailendra, and Hussein, H
Subjects: *EXPERT systems, *PRODUCTION planning, *METAL stamping, *USER interfaces, *COMPUTER software, *MICROSOFT Visual Basic (Computer program language)
Abstract: Process planning of sheet metal part is an important activity in the design of compound die. Traditional methods of carrying out this task are manual, tedious, time-consuming, error-prone and experience-based. This paper describes the research work involved in the development of an expert system for process planning of sheet metal parts produced on compound die. The proposed system is organized in six modules. For development of system modules, domain knowledge acquired from various sources of knowledge acquisition is refined and then framed in form of 'IF-Then' variety of production rules. System modules are coded in AutoLISP language and user interface is created using visual basic (VB). The system is capable to automate various activities of process planning including blank modeling, blank nesting, determining punch force required, selection of clearance between punch and die, identifying sheet metal operations, and determining proper sequence of operations for manufacturing the part. The proposed system can be implemented on a PC having VB and AutoCAD software, therefore its low cost of implementation makes it affordable even for small scale sheet metal industries. [ABSTRACT FROM AUTHOR]
Published: 2016
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16. Physics-driven Shape Variation Modelling at Early Design Stage.

Author: Das, Abhishek, Franciosa, Pasquale, Williams, David, and Ceglarek, Darek
Abstract: Modern markets are becoming increasingly competitive emphasizing the importance of achieving Right First Time (RFT) during the early design stage as a key enabler facilitating cost and time-to-launch (or time-to-market) reduction. One of the leading challenges to deliver RFT is the lack of effective methods to model product errors at early design stage. Usually, the assembly process is designed under the assumption of ideal (nominal) products. On the contrary, it has been demonstrated that product errors (both geometrical and dimensional) affect the performance of the final assembly. To facilitate easy decision making at early design stage, new methods and models are required to support design engineers. In this study, a framework has been proposed for early design support to generate product variation. International standard provides guidelines for product control and inspection (ISO-GPS or ASME-GD&T); however, the integration of tolerance standard into nominal sized CAD models is not yet achieved. Current, Computer Aided Tolerancing (CAT) tools mainly capable to model orientation and position tolerance specifications, whereas part shape errors are omitted. This paper presents an innovative physics-driven simulation framework to model shape errors of compliant sheet metal parts at early design stage. The modelling framework consists of three important stages: (i) initial shape error prediction using physic-based simulation, such as, stamping process simulation; (ii) individual orthogonal shape error modes/patterns identification based on decomposition techniques, such as, Geometric Modal Analysis (GMA); and, (iii) simulation of shape error variation classes by assigning distribution to each orthogonal shape error modes. The proposed approach enables to generate shape errors at early design stage of assembly process which can be utilized to optimize the assembly process, including fixture design and joining process parameters. An industrial automotive component illustrates the proposed methodology. [ABSTRACT FROM AUTHOR]
Published: 2016
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17. Parametric Variational Analysis of Compliant Sheet Metal Assemblies with Shell Elements.

Author: Gerbino, Salvatore, Franciosa, Pasquale, and Patalano, Stanislao
Abstract: One of most demanding tasks in the manufacturing field is controlling the variability of parts as it may affect strongly the deliverability of key characteristics defined at the final (product) assembly level. Current CAT systems offer a good solution to the tolerance analysis/synthesis task, but to handle flexible objects with shape errors more effort is needed to include methods able to capture the elastic behaviour of parts that adds more variability on the final assembly. Usually, sheet metal assemblies require dedicated fixtures and clamps layout to control the gap between parts in the specific location where a join must be placed. Due to the variability of parts the position of clamps can also be varied. The paper describes a FEM-based method able take into account part flexibility and shape error to parametrically analyse sheet metal assemblies by acting on some key parameters to look for the optimal clamp layout that guarantee the gap between parts to be under control after joining parts together. This method offers, with respect to commercial solutions, the ability to model fixtures, clamps and different joint types with no matter on the mesh nodes’ position. Locations of such elements are based on the shape functions defined at element (shell) mesh level and modelled as local constraints. So the user can generate a mesh without a previous knowledge of the exact positions of clamps, for example. This allows to conduit a faster parametric analysis without remeshing the surfaces and with no need to physically model the clamps. An aeronautic case study is described with a four-part assembly riveted on a quite complex fixture by using several clamps. [ABSTRACT FROM AUTHOR]
Published: 2015
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18. Transfer Function of Assembly Process with Compliant Non-ideal Parts.

Author: Das, Abhishek, Franciosa, Pasquale, Prakash, P.K.S., and Ceglarek, Darek
Abstract: Efficient modelling and analysis of geometric variation is crucial for quality control of assembly processes with compliant parts used for example in automotive and aerospace industries. Since most current computer-aided design (CAD) and Variation Simulation Analysis (VSA) systems are based on ideally sized, ideally located rigid or compliant geometry, they are unable to accurately model or predict the effects of variations in parts, fixturing and joining. This results in product failures due to un-modelled interactions between Key Product Characteristics (KPCs) of parts/assemblies and Key Control Characteristics (KCCs) of assembly process. Therefore, it is important to develop a generic variation simulation approach for assembly processes with complaint parts which will take into consideration non-ideal part geometries as caused by fabrication processes. This paper develops the Assembly Transfer Function ( ATF ) approach to model and simulate assembly process with compliant non-ideal parts. The proposed ATF is developed as an integration of three critical response functions of assembly process: (i) modelling non-ideal parts and its response to part fabrication errors; (ii) modelling n-2-1 fixture and its response to non-ideal parts; and (iii) modelling part-to-part joining process and its response to n-2-1 fixture. The ATF is developed in three steps: (i) use of the aforementioned three individual response functions; (ii) sampling of individual response functions; and, (iii) integration of the three response functions into an overall assembly process transfer function with capabilities to directly map input KCCs to output KPCs and ultimately to key performance indicators for assembly processes with compliant non-ideal parts. The developed ATF is demonstrated by using an industrial case study of automotive door assembly with remote fiber laser welding joining process. [ABSTRACT FROM AUTHOR]
Published: 2014
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19. Joining process and optimization of vehicle components by mechanical clinching

Author: Sulak, Kazım, Öztürk, Ferruh, and Bursa Uludağ Üniversitesi/Fen Bilimleri Enstitüsü/Otomotiv Mühendisliği Anabilim Dalı.
Subjects: Otomotiv, Mechanical joining, Clinch, Form punta, Taguchi, Sheet metal parts, Automotive, Kenetleme, Sac elemanlar, Clamping, Dayanım eniyilemesi, Strength optimization, Mekanik birleştirme
Abstract: Teknolojinin gelişmesiyle ve karbon salınım değerlerinin düşürülmesi maksadıyla özellikle binek araçlarda hafifletme çalışmaları artmaktadır. Bu sebeple araç üzerinde farklı fiziksel ve kimyasal özelliklerde malzeme kullanımı da artmaktadır. Farklı tür malzeme kullanımı arttıkça, yeni üretim yöntemlerine ihtiyaç duyulmaktadır. Kenetleme, patenti 19’uncu yüzyıla dayanmasına rağmen uzun süre sanayide geniş kullanım alanı bulamamıştır. Fakat, günümüzde başta otomotiv sektörü olmak üzere kullanımı her geçen gün artmaktadır. Kenetleme, aynı veya farklı tür malzemelerin birleştirilebilmesine imkân sunmaktadır. Punta kaynağına alternatif bir yöntemdir. Punta kaynağına göre en önemli avantajı, farklı tür malzemelerin birleştirilmesinde de kullanılabilmesidir. Malzeme üzerinde plastik deformasyon oluşturarak malzemeler arasında fiziksel bir kenet oluşmasını sağlar. Bu fiziksel kenet sayesinde malzemeler birleştirilmiş olur. Bu çalışmada kenetleme bağlantılarının kalitesine etki eden, kenetleme takımları üzerinde belirlenmiş olan bazı geometrik parametreler incelenmiştir. 0,8 mm kalınlığa sahip 6xxx serisi alüminyum iki sacın deneysel verileri ile sonlu elemanlar modelinin korelasyonu incelenmiştir. Fiziksel kenet miktarı, boyun kalınlığı, çekme kuvveti, ayırma kuvveti ele alınmıştır. Yapılan çalışmada form punta takım ölçülerinden hangi parametrenin dayanıma nasıl etki ettiği Taguchi yöntemi ile incelenmiştir. With the development of technology and with the aim of reducing carbon emissions, lightening efforts in passenger cars have been increasing. For these reasons, the use of different types physical and chemical properties of materials on the vehicle also have been increasing. As the use of different types of materials increases, new production methods are needed. Although the patent of clinch dates back to the 19th century, it could not find wide use in industry for a long time. However, its use has been increasing day by day, especially in the automotive sector. Clinch offers the opportunity to join the same or different types of materials. It is an alternative method to spot welding. The most important advantage over spot welding is that it can be used for joining different types of materials. It creates a physical clamp between the materials by creating plastic deformation on the material. With the help of this physical clamp, the materials are joined. In this study, some geometric parameters of clinch tools that affect the quality of clinch connections were examined. The correlation of the finite element model with the experimental data of two 6xxx series aluminum sheets with 0.8 mm thickness was investigated. Amount of physical clamp, neck thickness, pulling force, seperation force are discussed. In this study, How which parameters of clinching tools affects the strength was investigated by Taguchi method.
Published: 2021

20. Optimization for process plans in sheet metal forming.

Author: Wagner, Silke, Sathe, Madan, and Schenk, Olaf
Subjects: *MATHEMATICAL optimization, *SHEET metal, *ANT algorithms, *PRODUCTION planning, *MANUFACTURING processes, *INDUSTRIAL costs
Abstract: Determining a process plan in the early phase of the sheet metal forming process is a mandatory task for a process planner. The objective of a process planner is to find a feasible and cost optimal process plan which, in particular, optimizes the assignment of processing elements to processing steps of the production process. We propose to find such an assignment in an automatic way for all the hole features by splitting the entire task into three subsequent steps. At each step, the combinatorial optimization problem is modeled as a bin packing problem with conflicts, and heuristically solved by a specifically designed ant colony optimizer. It is ensured that, at each step, the process plan is feasible while minimizing the tooling costs. In our computational results, we compare our approach to the existing greedy heuristic when computing a process plan for five different practice-relevant sheet metal parts, and show that we can save up to 50 % of the entire tooling costs. [ABSTRACT FROM AUTHOR]
Published: 2014
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21. Infrared thermography as a new method for quality control of sheet metal parts in the press shop.

Author: An, Q., Hortig, D., and Merklein, M.
Subjects: *SHEET metal, *THERMOGRAPHY, *QUALITY control, *SCIENTIFIC apparatus & instruments, *INFRARED technology
Published: 2012
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22. CCKBS: A component check knowledge-based system for assessing manufacturability of sheet metal parts

Author: Kumar, Shailendra, Singh, Rajender, and Sekhon, G.S.
Subjects: *EXPERT systems, *SHEET metal, *PRODUCT design, *COMPUTER-aided design
Abstract: Abstract: This paper describes a knowledge-based system developed for assisting product designers, process planners and die designers working in small and medium sheet metal industries for assessing manufacturability of sheet metal parts. Knowledge obtained from die designers, product design handbooks, catalogues and broachers has been analyzed, tabulated and incorporated into a set of production rules of the IF–THEN variety. The knowledge-based system is coded in the AutoLISP language and loaded into the prompt area of AutoCAD. During consultation, the proposed system generates friendly prompt eliciting from the user for job related. The system output includes recommendations on the suitability of geometrical features of the part for required manufacturing operations. This arrangement facilitates interfacing of design with drafting and can be operated on a PC/AT. Illustrative examples have been included for demonstrating the usefulness of the proposed system. The knowledge base of the proposed system can be modified depending upon the capabilities of a specific shop floor. The low-cost of the system makes it affordable for planners working in small and medium-sized enterprises. [Copyright &y& Elsevier]
Published: 2006
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23. Physics-driven Shape Variation Modelling at Early Design Stage

Author: Darek Ceglarek, David Williams, Abhishek Das, and Pasquale Franciosa
Subjects: 0209 industrial biotechnology, Engineering drawing, Engineering, Automotive industry, 02 engineering and technology, Fixture, Position tolerance, 020901 industrial engineering & automation, 0203 mechanical engineering, Component (UML), Sheet metal parts, Decomposition (computer science), Design process, Shape error, General Environmental Science, Physics, business.industry, Right first time, Process (computing), Control engineering, 020303 mechanical engineering & transports, Computer-aided, General Earth and Planetary Sciences, Variational parts, business
Abstract: Modern markets are becoming increasingly competitive emphasizing the importance of achieving Right First Time (RFT) during the early design stage as a key enabler facilitating cost and time-to-launch (or time-to-market) reduction. One of the leading challenges to deliver RFT is the lack of effective methods to model product errors at early design stage. Usually, the assembly process is designed under the assumption of ideal (nominal) products. On the contrary, it has been demonstrated that product errors (both geometrical and dimensional) affect the performance of the final assembly. To facilitate easy decision making at early design stage, new methods and models are required to support design engineers. In this study, a framework has been proposed for early design support to generate product variation. International standard provides guidelines for product control and inspection (ISO-GPS or ASME-GDT however, the integration of tolerance standard into nominal sized CAD models is not yet achieved. Current, Computer Aided Tolerancing (CAT) tools mainly capable to model orientation and position tolerance specifications, whereas part shape errors are omitted. This paper presents an innovative physics-driven simulation framework to model shape errors of compliant sheet metal parts at early design stage. The modelling framework consists of three important stages: (i) initial shape error prediction using physic-based simulation, such as, stamping process simulation; (ii) individual orthogonal shape error modes/patterns identification based on decomposition techniques, such as, Geometric Modal Analysis (GMA); and, (iii) simulation of shape error variation classes by assigning distribution to each orthogonal shape error modes. The proposed approach enables to generate shape errors at early design stage of assembly process which can be utilized to optimize the assembly process, including fixture design and joining process parameters. An industrial automotive component illustrates the proposed methodology.
Published: 2016

24. Concurrent manufacturing of parts and tools for the sheet-metal industry.

Author: Backes, F., Franke, V., and Geiger, M.
Abstract: The manufacturing of complex bent parts can be supported effectively by computer-aided planning methods. Software systems are already available for unfolding, laser cutting and bending sequence determination. The paper focuses on methods that support the design of non-standard bending tools and the flexible manufacturing of such tools using laminated object modelling (LOM) technology. The developed system allows for concurrent planning and manufacturing of bending parts and tools. Within the framework of this system, neural networks are applied for automated tool design. [ABSTRACT FROM AUTHOR]
Published: 1998
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25. Fixtureless Assembly of Sheet Metal Parts for the Aircraft Industry.

Author: Walczyk, D F, Raju, V, and Miller, R
Subjects: AIRCRAFT industry, SHEET metal working machinery
Abstract: A method is presented for fixtureless assembly of simple sheet metal parts (i.e. consisting of flat patterns and simple bends) used in the aircraft industry. Current industry practice relies on manually intensive procedures and rigid fixtures for part assembly. The present method relies on carefully toleranced alignment holes that are computer numerical control (CNC) machined into the parts at fastener locations. Parts are temporarily fastened at these alignment holes for their proper alignment together into the assembly, and then permanently fastened at all rivet and bolt locations. A simple procedure is used to characterize empirically the CNC hole drilling process in sheet metal for this method. A simple experiment, involving the assembly of four parts with rivets, successfully demonstrates the potential of fixtureless assembly. [ABSTRACT FROM AUTHOR]
Published: 2000
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26. Recognition of features in sheet metal parts manufactured using progressive dies.

Author: Yang, Yang, Hinduja, Srichand, Owodunni, Oladele O., and Heinemann, Robert
Subjects: *SHEET metal, *AUTOMATED planning & scheduling, *OBJECT recognition (Computer vision), *SHEET metal work, *PRODUCTION planning, *C++
Abstract: Feature recognition is an important stage in digital manufacturing as it supports activities such as automated process planning and part re-design. This paper describes a two-stage algorithm for recognising features in sheet metal parts which are manufactured using progressive dies. Representation of the part in neutral format (STEP AP203) facilitates the first stage of this algorithm in which the thickness faces are extracted in the form of chains. In the second stage, an extracted chain of faces is classified by, first, determining its topological and geometric characteristics and then comparing its characteristics with pre-set attributes for each feature. The system was developed in C++ and has been successfully tested on representative parts containing features ranging from simple bends to composite features, such as a cut-out with lance. • Methodology for extracting features mainly based on thickness face chains. • Geometric and topological characteristics of the features are captured in matrices. • Characteristics matrices are used to classify sheet metal features. [ABSTRACT FROM AUTHOR]
Published: 2021
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27. Experiments and FE-simulations of stretch flanging of DP-steels with different shear cut edge quality

Author: Sigvant, Mats, Falk, Johannes, Pilthammar, Johan, Sigvant, Mats, Falk, Johannes, and Pilthammar, Johan
Abstract: Dual-Phase (DP) steels are today used in the automotive industry due to its large strength to weight ratio. However, the high strength of DP-steel does have a negative impact on the general formability in sheet metal forming. Unfavourable process conditions in the press shop will, on top of this, reduce the formability of DP-steels even more. This paper addresses the problem of edge fracture in stretch flanges in sheet metal parts made of DP-steel. The experimental part involves tests of ten different DP590 and DP780 steel grades with three different shear cut qualities. The influence on the fracture strain of the sample orientation of the shear cut are also studied by facing the burr away or towards the punch and testing samples with the cut edge parallel with the rolling direction and the transverse direction. The strains are measured with an ARAMIS system in each test, together with punch displacement and punch force. All tests are then simulated with AutoFormplus R7 and the results from these simulations are compared with the experimental results in order to find the appropriate failure strain for each combination of supplier, coating, thickness and shear cut quality. © Published under licence by IOP Publishing Ltd.
Published: 2017
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28. Parametric Variational Analysis of Compliant Sheet Metal Assemblies with Shell Elements

Author: Stanislao Patalano, Salvatore Gerbino, Pasquale Franciosa, Gerbino, Salvatore, Franciosa, Pasquale, Patalano, Stanislao, R Teti, Franciosa, P, and Patalano, P.
Subjects: 0209 industrial biotechnology, Engineering, Tolerance analysis, Shell, 0211 other engineering and technologies, Shell (structure), Free shape variability, Mechanical engineering, 02 engineering and technology, Sheet metal parts, Compliant assemblies, Clamp layout optimisation, Fixture, 020901 industrial engineering & automation, Position (vector), General Environmental Science, Parametric statistics, Flexibility (engineering), 021103 operations research, business.industry, Structural engineering, Finite element method, Sheet metal part, TA, visual_art, visual_art.visual_art_medium, General Earth and Planetary Sciences, Compliant assemblie, Sheet metal, business
Abstract: One of most demanding tasks in the manufacturing field is controlling the variability of parts as it may affect strongly the deliverability of key characteristics defined at the final (product) assembly level. Current CAT systems offer a good solution to the tolerance analysis/synthesis task, but to handle flexible objects with shape errors more effort is needed to include methods able to capture the elastic behaviour of parts that adds more variability on the final assembly. Usually, sheet metal assemblies require dedicated fixtures and clamps layout to control the gap between parts in the specific location where a join must be placed. Due to the variability of parts the position of clamps can also be varied. The paper describes a FEM-based method able take into account part flexibility and shape error to parametrically analyse sheet metal assemblies by acting on some key parameters to look for the optimal clamp layout that guarantee the gap between parts to be under control after joining parts together. This method offers, with respect to commercial solutions, the ability to model fixtures, clamps and different joint types with no matter on the mesh nodes’ position. Locations of such elements are based on the shape functions defined at element (shell) mesh level and modelled as local constraints. So the user can generate a mesh without a previous knowledge of the exact positions of clamps, for example. This allows to conduit a faster parametric analysis without remeshing the surfaces and with no need to physically model the clamps. An aeronautic case study is described with a four-part assembly riveted on a quite complex fixture by using several clamps.
Published: 2015

29. Forming of tee parts by a process that combines diffusion welding and pneumothermal forming in the superplastic regime

Author: V. V. Kotov, V. V. Mironenko, S. A. Bersenev, and A. A. Cheslavskaya
Subjects: Alternative methods, Materials science, Metallurgy, Metals and Alloys, CONDENSED MATTER PHYSICS, DIFFUSION WELDING, Superplasticity, SHEET METAL PARTS, Diffusion welding, Condensed Matter Physics, TUBULAR PARTS MADE FROM SHEETS, ALTERNATIVE METHODS, Mechanics of Materials, Scientific method, VACUUM WELDING, Metallic materials, Materials Chemistry, SUPERPLASTIC EFFECT, METALLURGICAL ENGINEERING, PNEUMOTHERMAL FORMING OF SHEET METAL PARTS
Abstract: An alternative method is described for making tees. The article discusses the main stages in the advanced method, which combines diffusion welding and pneumothermal forming in the superplastic regime. The process of superplastic pneumothermal forming is modeled and calculated results are reported. In the method, pneumothermal forming is preceded by diffusion welding. © 2013 Springer Science+Business Media New York.
Published: 2013

30. Forming of tee parts by a process that combines diffusion welding and pneumothermal forming in the superplastic regime

Author: Cheslavskaya, A. A., Mironenko, V. V., Bersenev, S. A., Kotov, V. V., Cheslavskaya, A. A., Mironenko, V. V., Bersenev, S. A., and Kotov, V. V.
Abstract: An alternative method is described for making tees. The article discusses the main stages in the advanced method, which combines diffusion welding and pneumothermal forming in the superplastic regime. The process of superplastic pneumothermal forming is modeled and calculated results are reported. In the method, pneumothermal forming is preceded by diffusion welding. © 2013 Springer Science+Business Media New York.
Published: 2013

31. USING SHEET METAL WITHOUT CERTIFIED HARDNESS PROPERTIES IN PRODUCT DESIGN

Author: Kokolj, Uroš and Dolšak, Bojan
Subjects: design guidelines, Izdelki iz pločevine, sheet metal, udc:621.98-1(043.2), cost analysis, Sheet metal parts, sheet metal forming, stroškovna analiza, konstrukcijske smernice, pločevina, preoblikovanje pločevine, material properties, materialne lastnosti
Abstract: V diplomskem delu so prikazane in opisane smernice, kako konstruirati izdelke iz pločevine, ki nima garantiranih trdnostnih lastnosti. In sicer kako konstruirati izdelek, da ob slabšem materialu in tanjši pločevini, še vedno opravlja svojo funkcijo. Poleg prikazanih smernic konstruiranja, je v diplomskem delu analiziranih nekaj tipičnih izdelkov, na katerih so sistematično opredeljena izhodišča za konstruiranje s stroškovno analizo, ob upoštevanju proizvodnih možnosti. In this diploma work guidelines on how to design a sheet metal product without certified hardness properties are represented and described. Namely, how to design a product that in spite of worse material and thinner sheet metal can also perform its function is described. Besides the guidelines on how to design a sheet metal product without certified hardness properties in this diploma work there are also given analyses of some typical products, on which bases for designing with cost analysis taking into account the production possibilities are systematically identified.
Published: 2009

32. Modeling, analysis and performance optimization for material handling of compliant sheet metal parts.

Author: Li, Huifang
Subjects: Analysis, Compliant, Material Handling, Modeling, Performance Optimization, Sheet Metal Parts
Abstract: Material handling of compliant sheet metal parts is one of the most critical yet underresearched areas in the stamping process. Material handling systems for large compliant parts can significantly impact both part dimensional quality and production rate. The intrinsic cause is the compliance-induced sheet metal part deformation. Currently, the practice of setting up and running material handling equipment is based on a trial and error method. There has been very little research completed concerning the material handling for compliant sheet metal parts. This dissertation develops a systematic methodology to model the material handling system, analyze its impact on the handled part deformation during the handling process, and optimize its performance as measured by part dimensional quality and transfer time. The methodology can be implemented into the design stage of a stamping line and serve as a guideline for improvement of part dimensional quality and production rate. The systematic methodology includes: (1) Optimization of part holding end effector layout. This extends the design of N-2-1 fixturing layout by adding part movability conditions and is realized by integrating FEA modeling of part deformation with an optimization algorithm. Experimental results verified the methodology developed. (2) Development of a dexterous part holding model. The model has the flexibility to reflect real characteristics of the vacuum cup type of end effectors. It advances the rigid point model by predicting part deformation behavior more accurately for different modes of part deformation and for the entire domain of part-holding end effector locations. A method for the model structure design is presented and an algorithm for estimation of the model parameters is developed. Experiments verified the validity of the development. (3) Time optimal trajectory planning for compliant part transfer. This development addresses an important research topic by considering the deformation of compliant parts in trajectory planning. Part deformation determined by transfer dynamic parameters is considered as a nonlinear constraint, which is obtained from FEA modeling and data processing. Part permanent deformation, trajectory smoothness, and static obstacle avoidance can also be handled. The methodology is validated by simulations in various motion conditions and obstacle configurations.
Published: 2001

33. Transfer Function of Assembly Process with Compliant Non-ideal Parts

Author: Darek Ceglarek, Pasquale Franciosa, Abhishek Das, and P.K.S. Prakash
Subjects: Engineering, Fixture Modeller, Assembly Transfer Function, business.industry, Process (engineering), Automotive industry, Mechanical engineering, CAD, Fixture, Modelling & Simulation, Transfer function, Sheet Metal Parts, Fastening Modeller, Key (cryptography), General Earth and Planetary Sciences, Performance indicator, Non-Ideal Part Modeller, business, Aerospace, General Environmental Science
Abstract: Efficient modelling and analysis of geometric variation is crucial for quality control of assembly processes with compliant parts used for example in automotive and aerospace industries. Since most current computer-aided design (CAD) and Variation Simulation Analysis (VSA) systems are based on ideally sized, ideally located rigid or compliant geometry, they are unable to accurately model or predict the effects of variations in parts, fixturing and joining. This results in product failures due to un-modelled interactions between Key Product Characteristics (KPCs) of parts/assemblies and Key Control Characteristics (KCCs) of assembly process. Therefore, it is important to develop a generic variation simulation approach for assembly processes with complaint parts which will take into consideration non-ideal part geometries as caused by fabrication processes. This paper develops the Assembly Transfer Function ( ATF ) approach to model and simulate assembly process with compliant non-ideal parts. The proposed ATF is developed as an integration of three critical response functions of assembly process: (i) modelling non-ideal parts and its response to part fabrication errors; (ii) modelling n-2-1 fixture and its response to non-ideal parts; and (iii) modelling part-to-part joining process and its response to n-2-1 fixture. The ATF is developed in three steps: (i) use of the aforementioned three individual response functions; (ii) sampling of individual response functions; and, (iii) integration of the three response functions into an overall assembly process transfer function with capabilities to directly map input KCCs to output KPCs and ultimately to key performance indicators for assembly processes with compliant non-ideal parts. The developed ATF is demonstrated by using an industrial case study of automotive door assembly with remote fiber laser welding joining process.
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34. Digitální zprovoznění robotizovaného výrobního systému pro odporové navařování

Author: Vetiška, Jan, Bražina, Jakub, Šuba, Marek, Vetiška, Jan, Bražina, Jakub, and Šuba, Marek
Abstract: Předmětem této diplomové práce je simulace a digitální zprovoznění robotizovaného výrobního systému pro navařování elementů jako například čepů na plechové díly. Základem práce je rešerše problematiky spjaté s průmyslovými roboty, PLC řízením, nástroji používanými pro navařování, upínacími přípravky, manipulátory, senzorikou, bezpečnostními a ochrannými prvky běžně používanými v takovýchto výrobních systémech. Druhá část práce se věnuje samotnému zadanému problému a jedná se tedy o virtuální zprovoznění řešeného konceptu robotizovaného výrobního systému. To znamená vytvoření jeho simulačního modelu v prostředí Process Simulate, výběr robotů, vytvoření robotických trajektorií, analýza kolizí, tvorba senzorů, signálů a optimalizace. V poslední části následuje propojení simulačního modelu se softwarem S-7PLCSIM Advanced a TIA Portal, vytvoření řídící PLC logiky ve formě programu, vizualizace a ověření jejich funkčnosti pomocí výše zmíněného propojení se simulačním modelem., The subject of this diploma thesis is the simulation and digital commissioning of a robotic production system for welding elements such as studs on sheet metal parts. The basis of the work is search of information related to industrial robots, PLC control, tools used for welding, fixtures, manipulators, sensors, safety and protection elements commonly used in such production systems. The second part of the work deals with the given problem and it is a virtual commissioning of the given concept of a robotic production system. This means creating its simulation model in the Process Simulate environment, selecting robots, creating robotic trajectories, collision analysis, creating sensors, signals and optimization. Last part includes the connection of the simulation model with the software S-7PLCSIM Advanced and TIA Portal, the creation of control PLC logic in the form of a program, visualization and verification of their functionality using the above-mentioned connection with the simulation model.

35. Digitální zprovoznění robotizovaného výrobního systému pro odporové navařování

Author: Vetiška, Jan, Bražina, Jakub, Šuba, Marek, Vetiška, Jan, Bražina, Jakub, and Šuba, Marek
Abstract: Předmětem této diplomové práce je simulace a digitální zprovoznění robotizovaného výrobního systému pro navařování elementů jako například čepů na plechové díly. Základem práce je rešerše problematiky spjaté s průmyslovými roboty, PLC řízením, nástroji používanými pro navařování, upínacími přípravky, manipulátory, senzorikou, bezpečnostními a ochrannými prvky běžně používanými v takovýchto výrobních systémech. Druhá část práce se věnuje samotnému zadanému problému a jedná se tedy o virtuální zprovoznění řešeného konceptu robotizovaného výrobního systému. To znamená vytvoření jeho simulačního modelu v prostředí Process Simulate, výběr robotů, vytvoření robotických trajektorií, analýza kolizí, tvorba senzorů, signálů a optimalizace. V poslední části následuje propojení simulačního modelu se softwarem S-7PLCSIM Advanced a TIA Portal, vytvoření řídící PLC logiky ve formě programu, vizualizace a ověření jejich funkčnosti pomocí výše zmíněného propojení se simulačním modelem., The subject of this diploma thesis is the simulation and digital commissioning of a robotic production system for welding elements such as studs on sheet metal parts. The basis of the work is search of information related to industrial robots, PLC control, tools used for welding, fixtures, manipulators, sensors, safety and protection elements commonly used in such production systems. The second part of the work deals with the given problem and it is a virtual commissioning of the given concept of a robotic production system. This means creating its simulation model in the Process Simulate environment, selecting robots, creating robotic trajectories, collision analysis, creating sensors, signals and optimization. Last part includes the connection of the simulation model with the software S-7PLCSIM Advanced and TIA Portal, the creation of control PLC logic in the form of a program, visualization and verification of their functionality using the above-mentioned connection with the simulation model.

36. Automatické generování pozic optického skeneru pro digitalizaci plechových dílů

Author: Brandejs, Jan, Druckmüller, Miloslav, Matula, Pavel, Morovič,, Ladislav, Koutecký, Tomáš, Brandejs, Jan, Druckmüller, Miloslav, Matula, Pavel, Morovič,, Ladislav, and Koutecký, Tomáš
Abstract: Práce se zabývá návrhem metodiky pro automatické generování pozic optického skeneru pro digitalizaci plechových dílů na základě počítačového modelu měřeného dílu. Výroba a s tím související inspekce plechových dílů jsou velmi úzce spojeny s automobilním průmyslem. Kvůli obecným zvyšujícím se nárokům na přesnost je v sériové výrobě kladen požadavek na přesnou kontrolu vyráběných dílů. K tomu se stále častěji začínají využívat optické 3D skenery a průmyslové roboty. V případě zavedení výroby nového dílu a jeho automatické kontroly v procesu sériové výroby je nutné připravit pozice měření, ze kterých dojde k přesné a rychlé digitalizaci dílu pro následnou inspekci. Příprava těchto pozic probíhá nejčastěji ručním uvedením robota do daných pozic a jejich uložením. Navržená metodika řeší přípravu pozic automaticky. V práci je představena metodika návrhu pozic měření, jejich simulace na skutečnou viditelnost části dílu pomocí osvětlovacího modelu a simulace vygenerovaných pozic na dostupnost robota. Metodika byla zpracována jako plugin pro software Rhinoceros. Na základě experimentálního ověření bylo zjištěno, že dojde ke značné časové úspoře v přípravě pozic měření v porovnání s jejich ruční přípravou., This thesis deals with the development of a new methodology for automatic generation of scanning positions based on a computer model of the part for digitization of sheet metal parts. Manufacture and related inspection of sheet metal parts are closely connected to automotive industry. Based on increasing general requirements on accuracy, there is also a requirement for accurate inspection of manufactured parts in serial-line production. Optical 3D scanners and industrial robots are used more often for that purpose. Measuring positions for accurate and fast digitization of a part need to be prepared as the manufacturing of the new part begins. Planning of such positions is done manually by positioning of the industrial robot and saving the positions. The planning of positions proposed by this methodology is done automatically. A methodology of positions planning, their simulation for true visibility of the part elements using reflectance model and a simulation of the positions for robot reachability is presented in this thesis. The entire methodology is implemented as a plug-in for the Rhinoceros software. High reduction of time in positions planning compared to the manual approach was observed in the performed experiments.

37. Automatické generování pozic optického skeneru pro digitalizaci plechových dílů

Author: Brandejs, Jan, Druckmüller, Miloslav, Matula, Pavel, Morovič,, Ladislav, Brandejs, Jan, Druckmüller, Miloslav, Matula, Pavel, and Morovič,, Ladislav
Abstract: Práce se zabývá návrhem metodiky pro automatické generování pozic optického skeneru pro digitalizaci plechových dílů na základě počítačového modelu měřeného dílu. Výroba a s tím související inspekce plechových dílů jsou velmi úzce spojeny s automobilním průmyslem. Kvůli obecným zvyšujícím se nárokům na přesnost je v sériové výrobě kladen požadavek na přesnou kontrolu vyráběných dílů. K tomu se stále častěji začínají využívat optické 3D skenery a průmyslové roboty. V případě zavedení výroby nového dílu a jeho automatické kontroly v procesu sériové výroby je nutné připravit pozice měření, ze kterých dojde k přesné a rychlé digitalizaci dílu pro následnou inspekci. Příprava těchto pozic probíhá nejčastěji ručním uvedením robota do daných pozic a jejich uložením. Navržená metodika řeší přípravu pozic automaticky. V práci je představena metodika návrhu pozic měření, jejich simulace na skutečnou viditelnost části dílu pomocí osvětlovacího modelu a simulace vygenerovaných pozic na dostupnost robota. Metodika byla zpracována jako plugin pro software Rhinoceros. Na základě experimentálního ověření bylo zjištěno, že dojde ke značné časové úspoře v přípravě pozic měření v porovnání s jejich ruční přípravou., This thesis deals with the development of a new methodology for automatic generation of scanning positions based on a computer model of the part for digitization of sheet metal parts. Manufacture and related inspection of sheet metal parts are closely connected to automotive industry. Based on increasing general requirements on accuracy, there is also a requirement for accurate inspection of manufactured parts in serial-line production. Optical 3D scanners and industrial robots are used more often for that purpose. Measuring positions for accurate and fast digitization of a part need to be prepared as the manufacturing of the new part begins. Planning of such positions is done manually by positioning of the industrial robot and saving the positions. The planning of positions proposed by this methodology is done automatically. A methodology of positions planning, their simulation for true visibility of the part elements using reflectance model and a simulation of the positions for robot reachability is presented in this thesis. The entire methodology is implemented as a plug-in for the Rhinoceros software. High reduction of time in positions planning compared to the manual approach was observed in the performed experiments.

38. Digitální zprovoznění robotizovaného výrobního systému pro odporové navařování

Author: Vetiška, Jan, Bražina, Jakub, Vetiška, Jan, and Bražina, Jakub
Abstract: Předmětem této diplomové práce je simulace a digitální zprovoznění robotizovaného výrobního systému pro navařování elementů jako například čepů na plechové díly. Základem práce je rešerše problematiky spjaté s průmyslovými roboty, PLC řízením, nástroji používanými pro navařování, upínacími přípravky, manipulátory, senzorikou, bezpečnostními a ochrannými prvky běžně používanými v takovýchto výrobních systémech. Druhá část práce se věnuje samotnému zadanému problému a jedná se tedy o virtuální zprovoznění řešeného konceptu robotizovaného výrobního systému. To znamená vytvoření jeho simulačního modelu v prostředí Process Simulate, výběr robotů, vytvoření robotických trajektorií, analýza kolizí, tvorba senzorů, signálů a optimalizace. V poslední části následuje propojení simulačního modelu se softwarem S-7PLCSIM Advanced a TIA Portal, vytvoření řídící PLC logiky ve formě programu, vizualizace a ověření jejich funkčnosti pomocí výše zmíněného propojení se simulačním modelem., The subject of this diploma thesis is the simulation and digital commissioning of a robotic production system for welding elements such as studs on sheet metal parts. The basis of the work is search of information related to industrial robots, PLC control, tools used for welding, fixtures, manipulators, sensors, safety and protection elements commonly used in such production systems. The second part of the work deals with the given problem and it is a virtual commissioning of the given concept of a robotic production system. This means creating its simulation model in the Process Simulate environment, selecting robots, creating robotic trajectories, collision analysis, creating sensors, signals and optimization. Last part includes the connection of the simulation model with the software S-7PLCSIM Advanced and TIA Portal, the creation of control PLC logic in the form of a program, visualization and verification of their functionality using the above-mentioned connection with the simulation model.

39. Digitální zprovoznění robotizovaného výrobního systému pro odporové navařování

Author: Vetiška, Jan, Bražina, Jakub, Vetiška, Jan, and Bražina, Jakub
Abstract: Předmětem této diplomové práce je simulace a digitální zprovoznění robotizovaného výrobního systému pro navařování elementů jako například čepů na plechové díly. Základem práce je rešerše problematiky spjaté s průmyslovými roboty, PLC řízením, nástroji používanými pro navařování, upínacími přípravky, manipulátory, senzorikou, bezpečnostními a ochrannými prvky běžně používanými v takovýchto výrobních systémech. Druhá část práce se věnuje samotnému zadanému problému a jedná se tedy o virtuální zprovoznění řešeného konceptu robotizovaného výrobního systému. To znamená vytvoření jeho simulačního modelu v prostředí Process Simulate, výběr robotů, vytvoření robotických trajektorií, analýza kolizí, tvorba senzorů, signálů a optimalizace. V poslední části následuje propojení simulačního modelu se softwarem S-7PLCSIM Advanced a TIA Portal, vytvoření řídící PLC logiky ve formě programu, vizualizace a ověření jejich funkčnosti pomocí výše zmíněného propojení se simulačním modelem., The subject of this diploma thesis is the simulation and digital commissioning of a robotic production system for welding elements such as studs on sheet metal parts. The basis of the work is search of information related to industrial robots, PLC control, tools used for welding, fixtures, manipulators, sensors, safety and protection elements commonly used in such production systems. The second part of the work deals with the given problem and it is a virtual commissioning of the given concept of a robotic production system. This means creating its simulation model in the Process Simulate environment, selecting robots, creating robotic trajectories, collision analysis, creating sensors, signals and optimization. Last part includes the connection of the simulation model with the software S-7PLCSIM Advanced and TIA Portal, the creation of control PLC logic in the form of a program, visualization and verification of their functionality using the above-mentioned connection with the simulation model.

40. Digitální zprovoznění robotizovaného výrobního systému pro odporové navařování

Author: Vetiška, Jan, Bražina, Jakub, Vetiška, Jan, and Bražina, Jakub
Abstract: Předmětem této diplomové práce je simulace a digitální zprovoznění robotizovaného výrobního systému pro navařování elementů jako například čepů na plechové díly. Základem práce je rešerše problematiky spjaté s průmyslovými roboty, PLC řízením, nástroji používanými pro navařování, upínacími přípravky, manipulátory, senzorikou, bezpečnostními a ochrannými prvky běžně používanými v takovýchto výrobních systémech. Druhá část práce se věnuje samotnému zadanému problému a jedná se tedy o virtuální zprovoznění řešeného konceptu robotizovaného výrobního systému. To znamená vytvoření jeho simulačního modelu v prostředí Process Simulate, výběr robotů, vytvoření robotických trajektorií, analýza kolizí, tvorba senzorů, signálů a optimalizace. V poslední části následuje propojení simulačního modelu se softwarem S-7PLCSIM Advanced a TIA Portal, vytvoření řídící PLC logiky ve formě programu, vizualizace a ověření jejich funkčnosti pomocí výše zmíněného propojení se simulačním modelem., The subject of this diploma thesis is the simulation and digital commissioning of a robotic production system for welding elements such as studs on sheet metal parts. The basis of the work is search of information related to industrial robots, PLC control, tools used for welding, fixtures, manipulators, sensors, safety and protection elements commonly used in such production systems. The second part of the work deals with the given problem and it is a virtual commissioning of the given concept of a robotic production system. This means creating its simulation model in the Process Simulate environment, selecting robots, creating robotic trajectories, collision analysis, creating sensors, signals and optimization. Last part includes the connection of the simulation model with the software S-7PLCSIM Advanced and TIA Portal, the creation of control PLC logic in the form of a program, visualization and verification of their functionality using the above-mentioned connection with the simulation model.

41. Automatické generování pozic optického skeneru pro digitalizaci plechových dílů

Author: Brandejs, Jan, Druckmüller, Miloslav, Matula, Pavel, Morovič,, Ladislav, Brandejs, Jan, Druckmüller, Miloslav, Matula, Pavel, and Morovič,, Ladislav
Abstract: Práce se zabývá návrhem metodiky pro automatické generování pozic optického skeneru pro digitalizaci plechových dílů na základě počítačového modelu měřeného dílu. Výroba a s tím související inspekce plechových dílů jsou velmi úzce spojeny s automobilním průmyslem. Kvůli obecným zvyšujícím se nárokům na přesnost je v sériové výrobě kladen požadavek na přesnou kontrolu vyráběných dílů. K tomu se stále častěji začínají využívat optické 3D skenery a průmyslové roboty. V případě zavedení výroby nového dílu a jeho automatické kontroly v procesu sériové výroby je nutné připravit pozice měření, ze kterých dojde k přesné a rychlé digitalizaci dílu pro následnou inspekci. Příprava těchto pozic probíhá nejčastěji ručním uvedením robota do daných pozic a jejich uložením. Navržená metodika řeší přípravu pozic automaticky. V práci je představena metodika návrhu pozic měření, jejich simulace na skutečnou viditelnost části dílu pomocí osvětlovacího modelu a simulace vygenerovaných pozic na dostupnost robota. Metodika byla zpracována jako plugin pro software Rhinoceros. Na základě experimentálního ověření bylo zjištěno, že dojde ke značné časové úspoře v přípravě pozic měření v porovnání s jejich ruční přípravou., This thesis deals with the development of a new methodology for automatic generation of scanning positions based on a computer model of the part for digitization of sheet metal parts. Manufacture and related inspection of sheet metal parts are closely connected to automotive industry. Based on increasing general requirements on accuracy, there is also a requirement for accurate inspection of manufactured parts in serial-line production. Optical 3D scanners and industrial robots are used more often for that purpose. Measuring positions for accurate and fast digitization of a part need to be prepared as the manufacturing of the new part begins. Planning of such positions is done manually by positioning of the industrial robot and saving the positions. The planning of positions proposed by this methodology is done automatically. A methodology of positions planning, their simulation for true visibility of the part elements using reflectance model and a simulation of the positions for robot reachability is presented in this thesis. The entire methodology is implemented as a plug-in for the Rhinoceros software. High reduction of time in positions planning compared to the manual approach was observed in the performed experiments.

42. Automatické generování pozic optického skeneru pro digitalizaci plechových dílů

Author: Brandejs, Jan, Druckmüller, Miloslav, Matula, Pavel, Morovič,, Ladislav, Brandejs, Jan, Druckmüller, Miloslav, Matula, Pavel, and Morovič,, Ladislav
Abstract: Práce se zabývá návrhem metodiky pro automatické generování pozic optického skeneru pro digitalizaci plechových dílů na základě počítačového modelu měřeného dílu. Výroba a s tím související inspekce plechových dílů jsou velmi úzce spojeny s automobilním průmyslem. Kvůli obecným zvyšujícím se nárokům na přesnost je v sériové výrobě kladen požadavek na přesnou kontrolu vyráběných dílů. K tomu se stále častěji začínají využívat optické 3D skenery a průmyslové roboty. V případě zavedení výroby nového dílu a jeho automatické kontroly v procesu sériové výroby je nutné připravit pozice měření, ze kterých dojde k přesné a rychlé digitalizaci dílu pro následnou inspekci. Příprava těchto pozic probíhá nejčastěji ručním uvedením robota do daných pozic a jejich uložením. Navržená metodika řeší přípravu pozic automaticky. V práci je představena metodika návrhu pozic měření, jejich simulace na skutečnou viditelnost části dílu pomocí osvětlovacího modelu a simulace vygenerovaných pozic na dostupnost robota. Metodika byla zpracována jako plugin pro software Rhinoceros. Na základě experimentálního ověření bylo zjištěno, že dojde ke značné časové úspoře v přípravě pozic měření v porovnání s jejich ruční přípravou., This thesis deals with the development of a new methodology for automatic generation of scanning positions based on a computer model of the part for digitization of sheet metal parts. Manufacture and related inspection of sheet metal parts are closely connected to automotive industry. Based on increasing general requirements on accuracy, there is also a requirement for accurate inspection of manufactured parts in serial-line production. Optical 3D scanners and industrial robots are used more often for that purpose. Measuring positions for accurate and fast digitization of a part need to be prepared as the manufacturing of the new part begins. Planning of such positions is done manually by positioning of the industrial robot and saving the positions. The planning of positions proposed by this methodology is done automatically. A methodology of positions planning, their simulation for true visibility of the part elements using reflectance model and a simulation of the positions for robot reachability is presented in this thesis. The entire methodology is implemented as a plug-in for the Rhinoceros software. High reduction of time in positions planning compared to the manual approach was observed in the performed experiments.

43. Automatické generování pozic optického skeneru pro digitalizaci plechových dílů

Author: Brandejs, Jan, Druckmüller, Miloslav, Matula, Pavel, Morovič,, Ladislav, Brandejs, Jan, Druckmüller, Miloslav, Matula, Pavel, and Morovič,, Ladislav
Abstract: Práce se zabývá návrhem metodiky pro automatické generování pozic optického skeneru pro digitalizaci plechových dílů na základě počítačového modelu měřeného dílu. Výroba a s tím související inspekce plechových dílů jsou velmi úzce spojeny s automobilním průmyslem. Kvůli obecným zvyšujícím se nárokům na přesnost je v sériové výrobě kladen požadavek na přesnou kontrolu vyráběných dílů. K tomu se stále častěji začínají využívat optické 3D skenery a průmyslové roboty. V případě zavedení výroby nového dílu a jeho automatické kontroly v procesu sériové výroby je nutné připravit pozice měření, ze kterých dojde k přesné a rychlé digitalizaci dílu pro následnou inspekci. Příprava těchto pozic probíhá nejčastěji ručním uvedením robota do daných pozic a jejich uložením. Navržená metodika řeší přípravu pozic automaticky. V práci je představena metodika návrhu pozic měření, jejich simulace na skutečnou viditelnost části dílu pomocí osvětlovacího modelu a simulace vygenerovaných pozic na dostupnost robota. Metodika byla zpracována jako plugin pro software Rhinoceros. Na základě experimentálního ověření bylo zjištěno, že dojde ke značné časové úspoře v přípravě pozic měření v porovnání s jejich ruční přípravou., This thesis deals with the development of a new methodology for automatic generation of scanning positions based on a computer model of the part for digitization of sheet metal parts. Manufacture and related inspection of sheet metal parts are closely connected to automotive industry. Based on increasing general requirements on accuracy, there is also a requirement for accurate inspection of manufactured parts in serial-line production. Optical 3D scanners and industrial robots are used more often for that purpose. Measuring positions for accurate and fast digitization of a part need to be prepared as the manufacturing of the new part begins. Planning of such positions is done manually by positioning of the industrial robot and saving the positions. The planning of positions proposed by this methodology is done automatically. A methodology of positions planning, their simulation for true visibility of the part elements using reflectance model and a simulation of the positions for robot reachability is presented in this thesis. The entire methodology is implemented as a plug-in for the Rhinoceros software. High reduction of time in positions planning compared to the manual approach was observed in the performed experiments.

44. Automatické generování pozic optického skeneru pro digitalizaci plechových dílů

Author: Brandejs, Jan, Druckmüller, Miloslav, Matula, Pavel, Morovič,, Ladislav, Koutecký, Tomáš, Brandejs, Jan, Druckmüller, Miloslav, Matula, Pavel, Morovič,, Ladislav, and Koutecký, Tomáš
Abstract: Práce se zabývá návrhem metodiky pro automatické generování pozic optického skeneru pro digitalizaci plechových dílů na základě počítačového modelu měřeného dílu. Výroba a s tím související inspekce plechových dílů jsou velmi úzce spojeny s automobilním průmyslem. Kvůli obecným zvyšujícím se nárokům na přesnost je v sériové výrobě kladen požadavek na přesnou kontrolu vyráběných dílů. K tomu se stále častěji začínají využívat optické 3D skenery a průmyslové roboty. V případě zavedení výroby nového dílu a jeho automatické kontroly v procesu sériové výroby je nutné připravit pozice měření, ze kterých dojde k přesné a rychlé digitalizaci dílu pro následnou inspekci. Příprava těchto pozic probíhá nejčastěji ručním uvedením robota do daných pozic a jejich uložením. Navržená metodika řeší přípravu pozic automaticky. V práci je představena metodika návrhu pozic měření, jejich simulace na skutečnou viditelnost části dílu pomocí osvětlovacího modelu a simulace vygenerovaných pozic na dostupnost robota. Metodika byla zpracována jako plugin pro software Rhinoceros. Na základě experimentálního ověření bylo zjištěno, že dojde ke značné časové úspoře v přípravě pozic měření v porovnání s jejich ruční přípravou., This thesis deals with the development of a new methodology for automatic generation of scanning positions based on a computer model of the part for digitization of sheet metal parts. Manufacture and related inspection of sheet metal parts are closely connected to automotive industry. Based on increasing general requirements on accuracy, there is also a requirement for accurate inspection of manufactured parts in serial-line production. Optical 3D scanners and industrial robots are used more often for that purpose. Measuring positions for accurate and fast digitization of a part need to be prepared as the manufacturing of the new part begins. Planning of such positions is done manually by positioning of the industrial robot and saving the positions. The planning of positions proposed by this methodology is done automatically. A methodology of positions planning, their simulation for true visibility of the part elements using reflectance model and a simulation of the positions for robot reachability is presented in this thesis. The entire methodology is implemented as a plug-in for the Rhinoceros software. High reduction of time in positions planning compared to the manual approach was observed in the performed experiments.

45. Automatické generování pozic optického skeneru pro digitalizaci plechových dílů

Author: Brandejs, Jan, Druckmüller, Miloslav, Matula, Pavel, Morovič,, Ladislav, Koutecký, Tomáš, Brandejs, Jan, Druckmüller, Miloslav, Matula, Pavel, Morovič,, Ladislav, and Koutecký, Tomáš
Abstract: Práce se zabývá návrhem metodiky pro automatické generování pozic optického skeneru pro digitalizaci plechových dílů na základě počítačového modelu měřeného dílu. Výroba a s tím související inspekce plechových dílů jsou velmi úzce spojeny s automobilním průmyslem. Kvůli obecným zvyšujícím se nárokům na přesnost je v sériové výrobě kladen požadavek na přesnou kontrolu vyráběných dílů. K tomu se stále častěji začínají využívat optické 3D skenery a průmyslové roboty. V případě zavedení výroby nového dílu a jeho automatické kontroly v procesu sériové výroby je nutné připravit pozice měření, ze kterých dojde k přesné a rychlé digitalizaci dílu pro následnou inspekci. Příprava těchto pozic probíhá nejčastěji ručním uvedením robota do daných pozic a jejich uložením. Navržená metodika řeší přípravu pozic automaticky. V práci je představena metodika návrhu pozic měření, jejich simulace na skutečnou viditelnost části dílu pomocí osvětlovacího modelu a simulace vygenerovaných pozic na dostupnost robota. Metodika byla zpracována jako plugin pro software Rhinoceros. Na základě experimentálního ověření bylo zjištěno, že dojde ke značné časové úspoře v přípravě pozic měření v porovnání s jejich ruční přípravou., This thesis deals with the development of a new methodology for automatic generation of scanning positions based on a computer model of the part for digitization of sheet metal parts. Manufacture and related inspection of sheet metal parts are closely connected to automotive industry. Based on increasing general requirements on accuracy, there is also a requirement for accurate inspection of manufactured parts in serial-line production. Optical 3D scanners and industrial robots are used more often for that purpose. Measuring positions for accurate and fast digitization of a part need to be prepared as the manufacturing of the new part begins. Planning of such positions is done manually by positioning of the industrial robot and saving the positions. The planning of positions proposed by this methodology is done automatically. A methodology of positions planning, their simulation for true visibility of the part elements using reflectance model and a simulation of the positions for robot reachability is presented in this thesis. The entire methodology is implemented as a plug-in for the Rhinoceros software. High reduction of time in positions planning compared to the manual approach was observed in the performed experiments.

46. Digitální zprovoznění robotizovaného výrobního systému pro odporové navařování

Author: Vetiška, Jan, Bražina, Jakub, Šuba, Marek, Vetiška, Jan, Bražina, Jakub, and Šuba, Marek
Abstract: Předmětem této diplomové práce je simulace a digitální zprovoznění robotizovaného výrobního systému pro navařování elementů jako například čepů na plechové díly. Základem práce je rešerše problematiky spjaté s průmyslovými roboty, PLC řízením, nástroji používanými pro navařování, upínacími přípravky, manipulátory, senzorikou, bezpečnostními a ochrannými prvky běžně používanými v takovýchto výrobních systémech. Druhá část práce se věnuje samotnému zadanému problému a jedná se tedy o virtuální zprovoznění řešeného konceptu robotizovaného výrobního systému. To znamená vytvoření jeho simulačního modelu v prostředí Process Simulate, výběr robotů, vytvoření robotických trajektorií, analýza kolizí, tvorba senzorů, signálů a optimalizace. V poslední části následuje propojení simulačního modelu se softwarem S-7PLCSIM Advanced a TIA Portal, vytvoření řídící PLC logiky ve formě programu, vizualizace a ověření jejich funkčnosti pomocí výše zmíněného propojení se simulačním modelem., The subject of this diploma thesis is the simulation and digital commissioning of a robotic production system for welding elements such as studs on sheet metal parts. The basis of the work is search of information related to industrial robots, PLC control, tools used for welding, fixtures, manipulators, sensors, safety and protection elements commonly used in such production systems. The second part of the work deals with the given problem and it is a virtual commissioning of the given concept of a robotic production system. This means creating its simulation model in the Process Simulate environment, selecting robots, creating robotic trajectories, collision analysis, creating sensors, signals and optimization. Last part includes the connection of the simulation model with the software S-7PLCSIM Advanced and TIA Portal, the creation of control PLC logic in the form of a program, visualization and verification of their functionality using the above-mentioned connection with the simulation model.

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