759 results on '"Flexible manufacturing"'
Search Results
202. Multiproduct Mergers and the Product Mix in Domestic and Foreign Markets
- Author
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Chan, Jackie M. L., Irlacher, Michael, and Koch, Michael
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History ,L25 ,Polymers and Plastics ,F14 ,flexible manufacturing ,L22 ,horizontal mergers ,Industrial and Manufacturing Engineering ,product mix ,ddc:330 ,F12 ,Business and International Management ,G34 ,multiproduct firms ,exports ,event study - Abstract
This paper investigates the effects of mergers on the product mix of multiproduct firms. Thus, we open the black box of post-merger efficiency improvements to reveal a new margin of adjustment along the product dimension. We analyze horizontal mergers in a theoretical model where oligopolistic firms employ a flexible manufacturing technology and allocate assets between differentiated varieties. After a merger, acquirers drop products from their consolidated domestic product portfolio and reallocate assets towards core varieties. We further demonstrate that such merger-induced efficiency gains imply greater activity in foreign markets. Using detailed Danish register data, we document novel facts regarding mergers and multiproduct firms and find empirical evidence strongly supporting the model's predictions. Our results show that the number of domestic products of the post-merger acquirer falls relative to the sum of the premerger acquirer and target, that skewness of domestic sales rises towards core products, and that export activity increases.
- Published
- 2022
203. Transport platform of flexible production
- Subjects
mobile platform ,flexible manufacturing ,automatically guided vehicle ,algorithm development ,мобилÑÐ½Ð°Ñ Ð¿Ð»Ð°ÑÑоÑма ,ÑазÑабоÑка алгоÑиÑма ,гибкое пÑоизводÑÑво ,programming ,авÑомаÑиÑеÑки ÑпÑавлÑемое ÑÑанÑпоÑÑное ÑÑедÑÑво ,пÑогÑаммиÑование - Abstract
ÐÑедмеÑом иÑÑÐ»ÐµÐ´Ð¾Ð²Ð°Ð½Ð¸Ñ ÑвлÑеÑÑÑ ÑазÑабоÑка недоÑогой и доÑÑÑпной мобилÑной плаÑÑоÑмÑ, коÑоÑÐ°Ñ Ð¼Ð¾Ð¶ÐµÑ Ñ Ð¾ÑоÑо ÑÑнкÑиониÑоваÑÑ Ð´Ð»Ñ Ð°Ð²ÑомаÑизиÑованного ÑÑанÑпоÑÑа в гибком пÑоизводÑÑве.ÐÑновной ÑелÑÑ Ð²ÑпÑÑкной квалиÑикаÑионной ÑабоÑÑ ÑвлÑеÑÑÑ - вÑбÑаÑÑ Ð¸ ÑпÑоекÑиÑоваÑÑ Ð½ÐµÐ´Ð¾ÑогÑÑ Ð¸ доÑÑÑпнÑÑ Ð¼Ð¾Ð±Ð¸Ð»ÑнÑÑ Ð¿Ð»Ð°ÑÑоÑмÑ, ÑпоÑобнÑÑ Ð²ÑполнÑÑÑ Ð²Ñе ÑÑнкÑии авÑомаÑиÑеÑкого ÑÑанÑпоÑÑа.РмагиÑÑеÑÑкой диÑÑеÑÑаÑии Ñележка AGV бÑла вÑбÑана в каÑеÑÑве обÑекÑа Ð´Ð»Ñ ÑÑÐ°Ð²Ð½ÐµÐ½Ð¸Ñ Ð¸ анализа Ð³Ð¸Ð±ÐºÐ¸Ñ Ð¿ÑоизводÑÑвеннÑÑ ÑиÑÑем. ÐаÑÑики и дÑÑгие конÑигÑÑаÑии, иÑполÑзÑемÑе в ÑазÑабоÑанной Ñележке, бÑли вÑбÑÐ°Ð½Ñ Ð² ÑÑавнении Ñ ÑÑÑеÑÑвÑÑÑими коммеÑÑеÑкими Ñележками AGV. СиÑÑема бÑла запÑогÑаммиÑована Ð´Ð»Ñ Ð¾Ð±ÐµÑпеÑÐµÐ½Ð¸Ñ ÑоÑноÑÑи даÑÑика и ÑÑанÑпоÑÑной нагÑÑзки. ÐаконеÑ, ÑиÑÑема ÑеÑÑиÑÑеÑÑÑ Ð½Ð° ÑмоделиÑованной линии.ÐÑакÑиÑеÑÐºÐ°Ñ Ð·Ð½Ð°ÑимоÑÑÑ. ÐолÑÑеннÑе ÑезÑлÑÑаÑÑ Ð¼Ð¾Ð³ÑÑ Ð±ÑÑÑ Ð¸ÑполÑÐ·Ð¾Ð²Ð°Ð½Ñ Ð´Ð»Ñ ÑлÑÑÑÐµÐ½Ð¸Ñ ÑабоÑÑ Ð¿ÑомÑÑленного пÑедпÑиÑÑиÑ.ÐÑводÑ. РазÑабоÑаннÑй AGV Ñ Ð¾ÑоÑо ÑабоÑÐ°ÐµÑ Ð² каÑеÑÑве мобилÑной плаÑÑоÑÐ¼Ñ Ð² гибком пÑоизводÑÑве, повÑÑÐ°ÐµÑ Ð¿ÑоизводиÑелÑноÑÑÑ Ð¸ ÑÐ½Ð¸Ð¶Ð°ÐµÑ Ð·Ð°ÑÑаÑÑ., The subject of the research is the development of a low-cost and affordable mobile platform that can function well for automated transport in flexible manufacturing.The main purpose of the master's work is to select and design an inexpensive and affordable mobile platform that can perform all the functions of automated transport.In the master's thesis AGV was chosen as an object for comparison and analysis of flexible manufacturing systems. The sensors and other configurations used in the developed AGV were chosen in comparison to existing commercial AGV. The system has been programmed for sensor and transport load accuracy. Finally, the system is tested on a simulated line.Practical Significance. The results obtained can be used to improve the operation of an industrial plant.Findings. The developed AGV works well as a mobile platform in flexible manufacturing, increases productivity and reduces costs.
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- 2022
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204. Impedance spectroscopy sensing material properties for self-tuning ratio control in pharmaceutical industry
- Author
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Mihaela Ghita, Isabela Birs, Dana Copot, Ioana Nascu, and Clara M. Ionescu
- Subjects
Technology ,Technology and Engineering ,QH301-705.5 ,QC1-999 ,FLOW ,flexible manufacturing ,process control ,pharmaceutical industry ,anomalous diffusion ,material memory ,porous materials ,tableting ,continuous manufacturing ,ratio control ,General Materials Science ,Biology (General) ,QD1-999 ,Instrumentation ,Fluid Flow and Transfer Processes ,Physics ,Process Chemistry and Technology ,General Engineering ,Engineering (General). Civil engineering (General) ,Computer Science Applications ,MODEL ,Chemistry ,TA1-2040 - Abstract
Following the paradigm shift in the pharmaceutical industry from batch to continuous production, additional instrumentation and revision of control strategies to optimize material flow throughout the downstream processes are required. Tableting manufacturing is one of the most productive in terms of turnover and investment into new sensor technologies is an important decision-making step. This paper proposes a continuous solution to detect changes in material properties, and a control algorithm to aid in minimizing risk at the end-product line. Some of the sub-processes involved in tableting manufacturing perform changes in powder and liquid mixtures, granulation, density, therefore changing flow conditions of the raw material. Using impedance spectroscopy in a continuous sensing and monitoring context, it is possible to perform online identification of generalized (fractional) order parametric models where the coefficients are correlated to changes in material properties. The model parameters are then included in a self-tuning control gain used in ratio control as part of the local process control loop. The solution proposed here is easy to implement and poses a significant added value to the current state of art in pharmaceutical manufacturing technologies.
- Published
- 2022
205. Reactive online scheduling of mobile resources for adaptive layout evolution in line-less assembly system
- Author
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Lea Kaven, Jonas Rachner, Thomas Schmid, Amon Göppert, Robert H. Schmitt, and Publica
- Subjects
Online Scheduling ,Reactive ,Layout evolution ,General Earth and Planetary Sciences ,Flexible Manufacturing ,Layout Planning ,ddc:600 ,General Environmental Science - Abstract
55. CIRP Conference on Manufacturing Systems, CIRP CMS, Lugano, Switzerland, 27 Jun 2022 - 1 Jul 2022; Procedia CIRP 107, 270-275 (2022). doi:10.1016/j.procir.2022.04.044 special issue: "Leading manufacturing systems transformation : proceedings of the 55th CIRP Conference on Manufacturing Systems 2022 / edited by Emanuele Carpanzano, Claudio Boër, Anna Valente", Published by Elsevier, Amsterdam [u.a.]
- Published
- 2022
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206. Process Dynamics-Aware Flexible Manufacturing for Industry 4.0
- Author
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Michael Balszun, Clara Hobbs, Enrico Fraccaroli, Debayan Roy, Franco Fummi, and Samarjit Chakraborty
- Subjects
Flexible Manufacturing - Published
- 2022
207. The contribution of industry 4.0 technologies to increase internal and external operational flexibility of production systems
- Author
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Enrique, Daisy Valle and Frank, Alejandro Germán
- Subjects
Indústria 4.0 ,Gestão da produção ,Supply chain flexibility industry 4.0 ,Digital technologies ,Flexible manufacturing - Abstract
A flexibilidade da manufatura é reconhecida como um fator competitivo essencial na estratégia operacional das empresas, como resposta a necessidades do mercado, especialmente diante de incertezas e turbulências. A Industria 4.0 surge como um novo paradigma industrial que permite atender esse tipo de necessidades das empresas manufatureiras, sendo seu foco a criação de um sistema inteligente ao longo de toda a cadeia de valor que possibilita a obtenção de processos flexíveis e adaptativos. Contudo, a literatura acadêmica ainda não tem apresentado evidências empíricas sobre a forma como cada tecnologia específica da Indústria 4.0 pode contribuir para os requisitos de flexibilidade operacional. Embora Industria 4.0 seja apresentada como uma solução para essa necessidade, é sabido que existem diferentes tipos de implementação da Indústria 4.0 que dependem dos objetivos operacionais almejados e das características das empresas. Portanto, os conjuntos tecnológicos da Indústria 4.0 podem ter diferentes formas de contribuição para alcançar uma maior flexibilidade dos processos de produção. O objetivo desta tese é criar um framework para auxiliar as empresas na implementação de operações flexíveis no contexto da Indústria 4.0. O estudo seguiu uma abordagem mista, combinando métodos qualitativos e quantitativo. Em termos quantitativos, a tese apresenta duas pesquisas survey. A primeira foi conduzida com 94 empresas do setor de máquinas e equipamentos, através da qual se analisa o efeito que diferentes objetivos operacionais dentre eles a flexibilidade possuem sobre a definição de arranjos tecnológicos da Indústria 4.0. A segunda foi conduzida com 379 empresas, com objetivo de analisar como o conceito de smart supply chain contribui para a flexibilidade da cadeia de suprimento, principalmente no contexto de incertezas. Por outro lado, em termos qualitativos, a tese apresenta um estudo multicasos em 11 empresas de manufatura líderes na implantação de tecnologias 4.0, visando entender a forma como essas tecnologias são implementadas para alcançar diferentes requisitos de flexibilidade operacional. A presente tese demonstra que, de fato, as tecnologias 4.0 contribuem para a flexibilidade operacional, mas também explora as limitações e nuances dessas contribuições em diferentes situações. A principal contribuição deste estudo é fornecer evidências empíricas da efetividade de diferentes tecnologias utilizadas de forma combinada para incrementar a flexibilidade operacional nos seus diferentes níveis. Manufacturing flexibility is recognized as an essential competitive factor in the company's operational strategy as a response to market uncertainties and turbulence. Industry 4.0 emerges as a new industrial paradigm that allows meeting these types of needs of manufacturing companies, focusing on the creation of an intelligent system along the entire value chain that allows the achievement of flexible and adaptive processes. However, the academic literature has not yet presented empirical evidence on how each specific Industry 4.0 technology can contribute to operational flexibility requirements. Although Industry 4.0 is treated as a solution to this need, it is known that there are different types of implementations of Industry 4.0 depending on the operational objectives pursued and the characteristics of the companies. Therefore, the technological sets of Industry 4.0 can have different forms of contribution to achieve greater flexibility in production processes. The aim of this thesis is to create a framework to help companies implement flexible operations in the context of Industry 4.0. The study followed a mixed approach, combining qualitative and quantitative methods. In quantitative terms, the thesis presents two survey research. The first was conducted with 94 companies in the machinery and equipment sector, through which the effect that different operational objectives – including flexibility – have on the definition of technological arrangements in Industry 4.0, is analyzed. The second was conducted with 379 companies, with the objective of analyzing how the smart supply chain concept contributes to the flexibility of the supply chain, especially in the context of uncertainties.. On the other hand, in qualitative terms, the thesis presents a multi-case study in 11 leading manufacturing companies in the implementation of 4.0 technologies, aiming to understand how these technologies are implemented to achieve different operational flexibility requirements. The present thesis demonstrates that, in fact, 4.0 technologies contribute to operational flexibility, but also explores the limitations and nuances of these contributions in different situations. The main contribution of this study is to provide empirical evidence of the effectiveness of different technologies used in a combined way to increase operational flexibility at its different levels.
- Published
- 2022
208. ASPECTS REGARDING THE INFLUENCE OF THE ATR FUNCTION ON THE MANAGEMENT OF WARE AT THE FLEXIBLE MANUFACTURING SYSTEMS
- Author
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Ovidiu Gheorghe Moldovan
- Subjects
tool ware ,flexible manufacturing ,automatic tool rearrangement ,Engineering (General). Civil engineering (General) ,TA1-2040 - Abstract
Flexible manufacturing widely used in the manufacturing industry, but the implementation o a flexible manufacturing system can raise a series of challenges regarding. An area where in the case of flexible manufacturing systems can generate problem and have a significant influence on the production cost is the management of the tool ware. Tool ware can have a significant influence on the cost efficiency of a flexible manufacturing system either trough the high cost of the tool or trough the problems caused the finished pieces during the production process by tools that are not in the specified parameters. The paper will present the main aspects of the tool ware and of the automatic tool rearrangement function, analyze the influence of the ATR in an FMS and present the general aspects of an ART function implementation at the University of Oradea.
- Published
- 2015
209. 基于柔性制造系统工程训练教学的智能制造人才培养.
- Author
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杨斌 and 王振玉
- Abstract
The paper takes China Manufacturing 2025 as the background and reviews that intelligent manufacturing talents cultivation is a necessary requirement for increasing capability of independent innovation,promoting China e economic transformation and upgrading and enhancing national competitiveness,hence, the intelligent manufacturing talents cultivation is of great significance. The Engineering and Technical College of fully relies on the provincial experimental teaching demonstration center, namely the engineering construct flexible manufacturing production lines' laboratory for exploring and practicing intelligent manufacturing talents cultivation. And the paper elaborates how to organize and implement engineering training teaching and to acquire the fruitful results in practice teaching, and points that the engineering training teaching is feasible for intelligent manufacturing personnel training. [ABSTRACT FROM AUTHOR]
- Published
- 2017
210. Improving the technological preparations for manufacturing production.
- Author
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Burdo, G.
- Abstract
Means of faster and better technological preparation for multiproduct manufacturing are considered. The possibility of technological preparation in parallel with design and organizational preparation is demonstrated. An approach to organizational and technological design in the development of manufacturing processes is proposed. In this approach, the dynamics and goals of production systems are taken into account. A timeline for the introduction of the proposed approach is outlined, and the conditions for its successful implementation are specified. [ABSTRACT FROM AUTHOR]
- Published
- 2017
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211. Auction-based cooperation mechanism to parts scheduling for flexible job shop with inter-cells.
- Author
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Tang, Jiafu, Zeng, Chengkuan, and Pan, Zhendong
- Subjects
AUCTIONS ,PRODUCTION scheduling ,NONLINEAR programming ,MATRICES (Mathematics) ,HEURISTIC algorithms - Abstract
This paper addresses cell part scheduling (CPS) problem. In this problem, parts may need to visit machines in different cells with consideration Inter-cell transportation time. The processing route of parts can be flexible. The objective is to minimize the overall process make-span. An integer nonlinear programming (INLP) model is formulated to determine the schedule scheme of all parts. An auction-based heuristic approach is proposed to solve it, which focuses on dealing with cooperation between different cells. In this approach, each cell can act as an auctioneer or a bidder. In an auction, it contains call for auction, bid construction, modify bids and winner announcement. A reference matrix is also applied in the auction to guarantee parts to finish as early as possible. Numerical experiments were conducted to test the auction-based approach. The results demonstrate the effectiveness, sensitivity and stability of the proposed auction-based approach, especially suitable for instances in large scale within a short calculating time. [ABSTRACT FROM AUTHOR]
- Published
- 2016
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212. Large-Scale Online Multitask Learning and Decision Making for Flexible Manufacturing.
- Author
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Wang, JunPing, Sun, YunChuan, Zhang, WenSheng, Thomas, Ian, Duan, ShiHui, and Shi, YouKang
- Abstract
Large-scale machine coordination is a primary approach for flexible manufacturing, enabling large-scale autonomous machines to dynamically coordinate their actions in pursuit of a custom task. One of the key challenges for such large-scale systems is finding high-dimensional coordination decision-making policies. Multitask policy gradient algorithms can be used in search of high-dimensional policies, particularly in collaborative decision support systems and distributed control systems. However, it is difficult for these algorithms to learn online high-dimensional coordination control policies (CCP) from large-scale custom manufacturing tasks. This paper proposes a large-scale online multitask learning and decision-making approach, which can consecutively learn high-dimensional CCP in order to quickly coordinate machine actions online for large-scale custom manufacturing task. A large-scale online multitask leaning algorithm is developed, which is able to learn large-scale high-dimensional CCP in a flexible manufacturing scenario. An online stochastic planning algorithm is proposed, which online optimizes the Markov network structure in order to avoid expensive global search for the optimal policy. Experiments have been undertaken using a professional flexible manufacturing testbed deployed within a smart factory of Weichai Power in China. Results show the proposed approach to be more efficient when compared with previous works. [ABSTRACT FROM PUBLISHER]
- Published
- 2016
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213. Approach for self-optimising assembly of optical systems.
- Author
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Holters, Martin, Gatej, Alexander, Haag, Sebastian, Müller, Tobias, Loosen, Peter, and Brecher, Christian
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SELF-organizing systems ,COST control ,CLOSED loop systems ,INFORMATION theory ,COMPUTER input-output equipment - Abstract
The alignment of optical components is challenging. This paper proposes self-optimisation as a means for reducing planning efforts and increasing the system’s autonomy. Hence, reduced costs and production times can be achieved. Moreover, self-optimising approaches for laser optics assembly enabling autonomous compensation of manufacturing tolerances are presented. Based on ray-tracing simulation, the assembly system carries out the alignment of optics automatically. During the alignment process the laser beam is monitored and analysed. The ray-tracing simulation is updated in a closed-loop manner for gaining information on required correction movements. This information is passed to the assembly system in order to achieve a valid optical function using tolerance-affected components. The choice of metrology as well as the interfaces between different software packages and hardware components will be discussed. The alignment procedure will be described using the example of a miniaturised optical system suitable for laser beam guiding and shaping. [ABSTRACT FROM AUTHOR]
- Published
- 2016
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214. A method for the automatic generation of inverse kinematic maps in modular robotic systems.
- Author
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Mayyas, Mohammad and Mellish, Rochelle
- Subjects
ROBOT kinematics ,MODULES (Algebra) ,MATHEMATICAL optimization ,SYSTEMS design ,ROBOT design & construction - Abstract
Flexible manufacturing based on rapidly reconfigurable robotic systems will enable factories to meet time-sensitive and fast-changing industrial demands. However, with the rise of modular systems there is also the need to quickly and easily determine which configuration is optimal for performing a certain task. In this article, we present a path-based ad hoc technique for determining the inverse and forward kinematics map based on relative joint space variable to reduce the computational complexity. The proposed technique is nonsingular and suits kinematic analysis and optimization of robotic systems with undetermined configuration, and it can be extended to solve generalized inverse kinematic of robotics system involving large number of joint variable. [ABSTRACT FROM AUTHOR]
- Published
- 2016
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215. The measurement-aided welding cell-giving sight to the blind.
- Author
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Tuominen, Valtteri
- Subjects
- *
AUTOMOBILE part design & construction , *MANUFACTURING cells , *ROBOTIC welding , *FLEXIBLE manufacturing systems , *FLEXIBILITY (Mechanics) - Abstract
This article introduces the concept of a measurement-aided welding cell (MAWC). It then focuses on developing the MAWC for body and chassis components in the automotive industry. Industry 4.0 requires flexibility and reconfigurability from manufacturing systems, which has been addressed by cellular manufacturing systems (CMS). Traditional automotive welding technology is not flexible enough to be used as a CMS. So, the core of automotive production does not meet the needs of next-generation manufacturing and Industry 4.0. For the first time, this demand has been answered-by the MAWC. The MAWC is based on two handling robots, a welding robot and an optical measurement system, all integrated into one welding cell. The measurement system controls guides and gives feedback to the handling and welding robots. This way, accurate welding is based on actual part-to-part adjustment, rather than hard mechanical tooling. The lack of hard mechanical tooling allows flexibility. Measurement-assisted assembly and machining is not new. However, it has not previously been applied to complex welding processes, because traditional measurement technologies have not been satisfactory. A newly developed system using multi-camera measurement technology meets the flexibility requirements. The technology required for a MAWC is reviewed and found to be in common use in the automotive industry. Three development projects are presented in which the main functions of a MAWC are successfully demonstrated. Two of these projects were done with BMW. A MAWC allows the manufacturing process to immediately swap to a different product on the same line, increasing the production line utilisation rate and making it possible to produce several low-volume products in one manufacturing system. So, the MAWC will not only yield benefits from its scalable capacity and global decentralization, but it will also open new business opportunities for manufacturing low-volume luxury car parts or post-production spare parts. [ABSTRACT FROM AUTHOR]
- Published
- 2016
- Full Text
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216. The Pransky interview: Aldo Zini, President and CEO of Aethon, Inc.
- Author
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Pransky, Joanne
- Abstract
Purpose – The following paper is a “Q & A interview” conducted by Joanne Pransky of Industrial Robot Journal as a method to impart the combined technological, business and personal experience of a prominent, robotic industry engineer-turned successful business leader, regarding the commercialization and challenges of bringing technological inventions to market while overseeing a company. This paper aims to discuss these issues. Design/methodology/approach – The interviewee is Aldo Zini, President and CEO of Aethon, Inc., a robotics and software company that has developed an innovative automated platform to improve internal supply logistics. In this interview, Zini shares some of the technical and business details that have led up to the latest version of Aethon’s core product, the TUG, a mobile autonomous robot with more than 450 installs worldwide. Findings – Zini received a BS in Industrial Engineering from the University of Pittsburgh and a master’s in Public Management (Health Systems IT) from Carnegie Mellon University. While obtaining his BS degree, Zini did an internship in hospital consulting and became immediately interested in healthcare automation as a way to solve hospital inefficiencies. Zini went on to become the Vice President of Sales and Marketing for Automated Healthcare, which developed the first robotic medication dispensing system for hospitals (ROBOT-Rx) and was acquired by McKesson for $67 million. Before joining and investing in Aethon, Zini was Senior Vice President of sales and marketing for TechRx, one of the largest providers of software solutions to the pharmacy industry, which was sold to NDC Corporation for over $200 million. Originality/value – Zini has been leading the technology revolution in hospital automation for more than 25 years. His contributions to technology-driven companies have led to acquisitions worth more than a quarter of a billion dollars. Zini owns several patents in medication-dispensing technology, and is credited with the development of key methodologies in quantifying the value proposition for several technology platforms deployed in hundreds of hospitals across the country. [ABSTRACT FROM AUTHOR]
- Published
- 2016
- Full Text
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217. Applying genetic algorithms for programming manufactoring cell tasks
- Author
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Efredy Delgado, Carlos Julio Cortés Rodríguez, and Óscar Germán Duarte Velasco
- Subjects
flexible manufacturing ,manufacturing cells ,production-line scheduling ,genetic algorithms ,Engineering (General). Civil engineering (General) ,TA1-2040 - Abstract
This work was aimed for developing computational intelligence for scheduling a manufacturing cell's tasks, based manily on genetic algorithms. The manufacturing cell was modelled as beign a production-line; the makespan was calculated by using heuristics adapted from several libraries for genetic algorithms computed in C++ builder. Several problems dealing with small, medium and large list of jobs and machinery were resolved. The results were compared with other heuristics. The approach developed here would seem to be promising for future research concerning scheduling manufacturing cell tasks involving mixed batches.
- Published
- 2005
218. Framework for collaborative human-robot flexible manufacturing applications
- Author
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Cheng, Pangcheng David Cen, Sibona, Fiorella, and Indri, Marina
- Subjects
Human-Robot Collaboration ,Mobile robotics ,Flexible manufacturing - Abstract
A growing number of robots collaborating closely with human operators is envisaged to be employed in manufac- turing assembly lines in the next future. It has been demonstrated in many research works that robots increase the productivity and efficiency of the manufacturing process. However, safety is a challenging problem to be considered in human-robot collaborative applications. This work outlines a flexible human- robot collaborative framework, which is the core of a brand new project to be fully developed in the very next future, to provide intuitive and safe human-robot interactions, leveraging mobile robots and manipulators.
- Published
- 2021
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219. Flexible Scheduling and Wearable Haptics for Human-Robot Collaborative Assembly
- Author
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Maderna, Riccardo, Pozzi, Maria, Zanchettin, Andrea, Rocco, Paolo, and Prattichizzo, Domenico
- Subjects
Task scheduling ,Human-robot collaboration ,Wearable haptics ,Flexible manufacturing - Abstract
This work presents a human-robot collaboration paradigm that goes beyond the pure human-robot coexistence, achieving a flexible and human-aware integration of different operators in a work-cell. A dynamic scheduler able to plan the operations of multiple agents with on-line adaptation to human completion times and flexible management of failures is introduced. Instructions are communicated to the human through visual and haptic cues. In particular, a new tactile communication paradigm based on the association between operations and the portion of workspace in which they are performed is presented. The proposed approach was tested in a realistic human-robot collaboration scenario through an experimental campaign that involved 16 participants.
- Published
- 2021
- Full Text
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220. An Integrated Robotic Depalletizing System for Supermarkets' Backrooms
- Author
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Arpenti, Pierluigi, Caccavale, Riccardo, Fontanelli, Giuseppe Andrea, Lippiello, Vincenzo, Paduano, Gianmarco, Siciliano, Bruno, and Villani, Luigi
- Subjects
Computer Vision for Automation ,Intelligent ,Grippers ,ComputerApplications_COMPUTERSINOTHERSYSTEMS ,Flexible Manufacturing ,Logistics ,Other End-Effectors - Abstract
Depalletizing robotic systems are commonly de- ployed to automatize and speed up parts of logistic processes. De- spite this, the necessity to adapt the preexisting logistic processes to the automatic systems often impairs the application of such robotic solutions to small business realities like supermarkets. Integrating a robotic system into the supermarket depalletizing process demands a high level of autonomy, based on strong perceptive, executive and gripping capabilities. This abstract describes an integrated robotic depalletizing system designed to be easily deployed into supermarket logistic processes. The system is described along with its main components, showing how the proposed framework performs in a real supermarket scenario.
- Published
- 2021
- Full Text
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221. RESOLVE FACILITY LAYOUT PROBLEM BY USING GENETIC ALGORITHMS
- Author
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Shananu G. Pawar, Keshav Wakchoure, Shananu G. Pawar, and Keshav Wakchoure
- Abstract
The component layout problem requires efficient search of large, discontinuous spaces. Theefficient layout planning of a production site is a fundamental task to any project undertaking. This paper describes a genetic algorithm (GA) to solve the problem of optimal facilities lay out in manufacturing system design so that material-handling costs are minimized. The performance of the proposed heuristics tested over problems selected from the literature. Computational results indicate that the proposed approach gives better results compared to many existing algorithms in this area.
- Published
- 2021
222. Modelling for Decision-making in Dynamical Line-less Assembly Systems
- Author
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Grunert, Dennis, Göppert, Amon, Hort, Simon, Rachner, Jonas, Grahn, Lea, Schmitt, Robert H., Grunert, Dennis, Göppert, Amon, Hort, Simon, Rachner, Jonas, Grahn, Lea, and Schmitt, Robert H.
- Abstract
The shift towards electro mobility has a significant impact on the entire value chain of the automotive industry. The parallel production of Internal Combustion Engine, Battery Electric and Plug-in Hybrid Electric Vehicles con-fronts manufacturers with major challenges. This requires flexible production systems that are able to operate efficiently even under the influence of dynamic conditions. As could be seen in the COVID-19 pandemic, production systems must be able to react flexible and resilient even to these kinds of situations. Within the production system there is a multitude of temporally and spatially determined neuralgic points at which a reaction to dynamic conditions is possible and necessary. In order to make target-oriented decisions at these points, a large amount of data from many different sources is required as input parameters. The decisions can be made manually, semi-automatically or automatically by a human, a machine or a (software) system. Therefore it is essential that influences, input and output variables as well as decisions and the solution space are provided in a defined manner enabling all involved units to process the information. The paper therefore describes the first steps in modeling decisions for dynamic line-less assembly systems. Starting with an introduction to the topic and the multi-variant automotive production, the architecture of this kind of flexible assembly system is briefly described. Afterwards a description of the formal modeling of decisions in assembly systems is presented. Finally, after a discussion of the results, an outlook on the next steps and further research needs is given.
- Published
- 2021
223. Industry 4.0 Technologies in Flexible Manufacturing for Sustainable Organizational Value: Reflections from a Multiple Case Study of Italian Manufacturers
- Author
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Emanuele Gabriel Margherita, Alessio Maria Braccini, and Università degli studi della Tuscia [Viterbo]
- Subjects
Exploit ,Industry 4.0 ,Computer Networks and Communications ,sustainable value ,Social sustainability ,flexible manufacturing ,02 engineering and technology ,multiple case study ,social sustainability ,Theoretical Computer Science ,020204 information systems ,0502 economics and business ,0202 electrical engineering, electronic engineering, information engineering ,Production (economics) ,Productivity ,Industrial organization ,9. Industry and infrastructure ,business.industry ,05 social sciences ,technology adoption ,sustainability ,triple bottom line ,Automation ,8. Economic growth ,Workforce ,Sustainability ,[SHS.GESTION]Humanities and Social Sciences/Business administration ,050211 marketing ,Business ,Software ,Information Systems ,IT value - Abstract
International audience; In this study, we analyse the value creation of Industry 4.0 (I40) technologies in flexible manufacturing (FM) under a sustainability perspective. I40 is a popular strategy that Western manufacturing organizations adopt to face competition from low-cost producers. Organizations adopting I40 use advanced digital technologies to make production processes more flexible and increasingly automated. Several pieces of evidence confirm how I40 leads to higher productivity and higher-quality products, improving the economic performance of organizations. However, increasing automation may also lead to the reduction of human labour in the production process, which may contribute to the disappearance of jobs, the reduction of expertise and the loss of know-how in manufacturing organizations. While the literature acknowledges the technical and economic advantages of I40, the sustainability of the value created through these technologies deserves further investigation. To address the gap, we complement the IT value theory with the concept of sustainability, including the three dimensions of economic, environmental and social sustainability. We perform a multiple case study analysis of four Italian manufacturing organizations that have successfully implemented I40 technologies in FM. The cases show that I40 technologies support sustainable organizational value when they are deployed with a worker-centric approach. In this condition, the organization leverages workforce activities to continuously fine-tune the technologies and to exploit the adaptive features of the technologies to continuously improve processes.
- Published
- 2021
224. A Regenerative Business Model with Flexible, Modular and Scalable Processes in A Post-Covid Era: The Case of The Spinning Mesh Disc Reactor (SMDR)
- Author
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Parimala Shivaprasad, Emma Anna Carolina Emanuelsson, and Aurelie Charles
- Subjects
Computer science ,Supply chain ,media_common.quotation_subject ,resilient supply chain ,Geography, Planning and Development ,flexible manufacturing ,TJ807-830 ,02 engineering and technology ,Management, Monitoring, Policy and Law ,Business model ,TD194-195 ,Modularity ,Renewable energy sources ,020401 chemical engineering ,spinning mesh disc reactor ,Capital cost ,Quality (business) ,GE1-350 ,0204 chemical engineering ,media_common ,Flexibility (engineering) ,Environmental effects of industries and plants ,Renewable Energy, Sustainability and the Environment ,business.industry ,Modular design ,021001 nanoscience & nanotechnology ,Manufacturing engineering ,Product (business) ,Environmental sciences ,reaction intensification ,sustainable business models ,0210 nano-technology ,business - Abstract
With stringent environmental regulations and a new drive for sustainable manufacturing, there is an unprecedented opportunity to incorporate novel manufacturing techniques. Recent political and pandemic events have shown the vulnerability to supply chains, highlighting the need for localised manufacturing capabilities to better respond flexibly to national demand. In this paper, we have used the spinning mesh disc reactor (SMDR) as a case study to demonstrate the path forward for manufacturing in the post-Covid world. The SMDR uses centrifugal force to allow the spread of thin film across the spinning disc which has a cloth with immobilised catalyst. The modularity of the design combined with the flexibility to perform a range of chemical reactions in a single equipment is an opportunity towards sustainable manufacturing. A global approach to market research allowed us to identify sectors within the chemical industry interested in novel reactor designs. The drivers for implementing change were identified as low capital cost, flexible operation and consistent product quality. Barriers include cost of change (regulatory and capital costs), limited technical awareness, safety concerns and lack of motivation towards change. Finally, applying the key features of a Sustainable Business Model (SBM) to SMDR, we show the strengths and opportunities for SMDR to align with an SBM allowing for a low-cost, sustainable and regenerative system of chemical manufacturing.
- Published
- 2021
225. Multi-flexible integrated scheduling algorithm for multi-flexible integrated scheduling problem with setup times.
- Author
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Yang D, Xie Z, and Zhang C
- Abstract
To address the multi-flexible integrated scheduling problem with setup times, a multi-flexible integrated scheduling algorithm is put forward. First, the operation optimization allocation strategy, based on the principle of the relatively long subsequent path, is proposed to assign the operations to idle machines. Second, the parallel optimization strategy is proposed to adjust the scheduling of the planned operations and machines to make the processing as parallel as possible and reduce the no-load machines. Then, the flexible operation determination strategy is combined with the above two strategies to determine the dynamic selection of the flexible operations as the planned operations. Finally, a potential operation preemptive strategy is proposed to judge whether the planned operations will be interrupted by other operations during their processing. The results show that the proposed algorithm can effectively solve the multi-flexible integrated scheduling with setup times, and it can also better solve the flexible integrated scheduling problem.
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- 2023
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226. An automated solution for fixtureless sheet metal forming.
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Ilangovan, Balaji, Monfared, Radmehr, and Jackson, Michael
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- *
SHEET metal , *METALWORK , *MECHANICAL behavior of materials , *COST effectiveness , *MECHATRONICS - Abstract
Manual forming of sheet metal parts through traditional panel beating is a highly skilled profession used in many industries, particularly for sample manufacturing or repair and maintenance. However, this skill is becoming gradually isolated mainly due to the high cost and lack of expertise. Nonetheless, a cost-effective and flexible approach to forming sheet metal parts could significantly assist various industries by providing a method for fast prototyping sheet metal parts. The development of a new fixtureless sheet metal forming approach is discussed in this article. The proposed approach, named Mechatroforming, consists of integrated mechanisms to manipulate sheet metal parts by a robotic arm under a controlled hammering tool. The method includes mechatronics-based monitoring and control systems for (near) real-time prediction and control of incremental deformations of parts. This article includes description of the proposed approach, the theoretical and modelling backgrounds used to predict the forming, skills learned from manual operations, and proposed automation system being built. [ABSTRACT FROM AUTHOR]
- Published
- 2016
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227. Aluminium nitride nanowire array films for nanomanufacturing applications.
- Author
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Teker, K.
- Abstract
The present paper presents a systematic investigation of both catalyst free and catalyst assisted AlN nanowire synthesis by chemical vapour deposition using Al and NH3 as source materials. Growth runs have mostly been carried out at 1100°C under H2 as carrier gas. While the catalyst free growth runs resulted in long (∼40 μm) and dense AlN nanowire array films, the catalyst assisted growth resulted in short nanowires (3–5 μm). Growth mechanisms have been presented. Raman spectroscopy of the catalyst free grown nanowires has revealed very symmetric and strong phonon modes [e.g. strong E2 (high)] indicating very good crystal quality of the grown AlN nanowires. In brief, catalyst free growth eliminates catalyst contamination and produces high quality and density of long nanowires, which is very valuable for scale-up manufacturing opportunities of the AlN nanostructures. [ABSTRACT FROM AUTHOR]
- Published
- 2015
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228. ASPECTS REGARDING THE INFLUENCE OF THE ATR FUNCTION ON THE MANAGEMENT OF WARE AT THE FLEXIBLE MANUFACTURING SYSTEMS.
- Author
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Moldovan, Ovidiu Gheorghe
- Subjects
FLEXIBLE manufacturing systems ,PRODUCTION engineering ,PROCESS control systems ,INDUSTRIAL costs ,PRODUCT costing - Abstract
Flexible manufacturing widely used in the manufacturing industry, but the implementation o a flexible manufacturing system can raise a series of challenges regarding. An area where in the case of flexible manufacturing systems can generate problem and have a significant influence on the production cost is the management of the tool ware. Tool ware can have a significant influence on the cost efficiency of a flexible manufacturing system either trough the high cost of the tool or trough the problems caused the finished pieces during the production process by tools that are not in the specified parameters. The paper will present the main aspects of the tool ware and of the automatic tool rearrangement function, analyze the influence of the ATR in an FMS and present the general aspects of an ART function implementation at the University of Oradea [ABSTRACT FROM AUTHOR]
- Published
- 2015
229. Applying Gaia and AUML for the development of multiagent-based control software for flexible manufacturing systems: addressing methodological and implementation issues.
- Author
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Duran‐Faundez, Cristian, Ramos, Mario, and Rodriguez, Pedro
- Subjects
FLEXIBLE manufacturing systems ,COMPUTER software development ,MULTIAGENT systems ,COMPUTER simulation ,ETHERNET - Abstract
In this article, we present the development of a simple multiagent-based system for the control of a flexible manufacturing system. We followed the stages of a methodology specially conceived for the development of agent-based system, which is an integration of the classical methodology for agent-oriented analysis and design Gaia, and AUML (Agent-Unified Modeling Language). We adopted as study case the CIMUBB Laboratory at the University of Bio-Bio, which has a flexible manufacturing system including three flexible manufacturing cells interconnected by a conveyor belt. In the analysis stage, we identified roles involved, and we design models representing roles and protocols. In the design stage, we applied Gaia agent, services, and acquaintance models from Gaia, and we complemented with AUML as the adopted methodology suggests. With the developed models, we constructed a fully functional system where each agent was built as an independent process tree. Agents communicate by passing messages through the Ethernet network with socket interfaces. Various tests executed in our laboratory scale manufacturing system show the effectiveness of our implementation. Copyright © 2015 John Wiley & Sons, Ltd. [ABSTRACT FROM AUTHOR]
- Published
- 2015
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230. Reconfigurable distributed model predictive control.
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Tippett, Michael James and Bao, Jie
- Subjects
- *
ENERGY dissipation , *PREDICTIVE control systems , *ADAPTIVE computing systems , *ELECTRIC network topology , *PERFORMANCE evaluation - Abstract
An approach to reconfigurable distributed model predictive control based on reconfigurable controller dissipativity properties is developed. The dissipativity properties of the controllers are updated online to reconfigure themselves for changes in the process network topology, which may be due to changing product specifications, feedstock type or scheduled or unscheduled maintenance; allowing for more flexible and agile manufacturing processes. The use of dissipative systems theory allows for the interaction effects between individual processes to be taken into account in control design to achieve high levels of plant-wide performance. Plant-wide performance and stability bounds are developed based on dissipative systems theory, which in turn are translated into the dissipative trajectory conditions on each local controller. This approach is enabled by the use of dynamic supply rates in quadratic difference form parameterised as linear functions of the process network structure. [ABSTRACT FROM AUTHOR]
- Published
- 2015
- Full Text
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231. A comparative evaluation of three industrial robots using three reference measuring techniques.
- Author
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Slamani, Mohamed, Joubair, Ahmed, and Bonev, Ilian A.
- Abstract
Purpose – The purpose of this paper is to present a technique for assessing and comparing the static and dynamic performance of three different models of small six-axis industrial robots using a Renishaw XL80 laser interferometer system, a FARO ION laser tracker and a Renishaw QC20-W telescoping ballbar. Design/methodology/approach – Specific test methods are proposed in this work, and each robot has been measured in a similar area of its working envelope. The laser interferometer measurement instrument is used to assess the static positioning performance along three linear and orthogonal paths. The laser tracker is used to assess the contouring performance at different tool center point (TCP) speeds along a triangular tool path, whereas the telescoping ballbar is used to assess the dynamic positioning performance for circular paths at different TCP speeds and trajectory radii. Findings – It is found that the tested robots behave differently, and that the static accuracy of these non-calibrated robots varies between 0.5 and 2.3 mm. On the other hand, results show that these three robots can provide acceptable corner tracking at low TCP speeds. However, a significant overshoot at the corner is observed at high TCP speed for all the robots tested. It was also found that the smallest increment of Cartesian displacement (Cartesian resolution) that can be taken by the tested robots is approximately 50 μm. Practical implications – The technique used in this paper allows extremely accurate diagnosis of the robot performance, which makes it possible for the robot user to determine whether the robot is in good or bad condition. It can also help the decision-maker to select the most suitable industrial robot to achieve the desired task with minimum cost and specific application ability. Originality/value – This paper proposed a new method based on the performance verification approach for solving the robot selection problem for flexible manufacturing systems. Furthermore, despite their importance, bidirectional repeatability and Cartesian resolution are never specified by the manufacturers of industrial robots nor are they described in the ISO 9283:1998 guide, and they are rarely the object of performance assessments. In this work, specific tests are performed to check and quantify the bidirectional repeatability and the Cartesian resolution of each robot. [ABSTRACT FROM AUTHOR]
- Published
- 2015
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232. Plug & produce by modelling skills and service-oriented orchestration of reconfigurable manufacturing systems.
- Author
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Pfrommer, Julius, Stogl, Denis, Aleksandrov, Kiril, Escaida Navarro, Stefan, Hein, Björn, and Beyerer, Jürgen
- Subjects
CYBER physical systems ,FLEXIBLE manufacturing systems ,SERVICE-oriented architecture (Computer science) ,MOBILE robots ,SEMANTICS - Abstract
Copyright of Automatisierungstechnik is the property of De Gruyter 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
- 2015
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233. The integration of contactless static pose recognition and dynamic hand motion tracking control system for industrial human and robot collaboration.
- Author
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Tang, Gilbert, Asif, Seemal, and Webb, Phil
- Abstract
Purpose – The purpose of this paper is to describe the integration of a gesture control system for industrial collaborative robot. Human and robot collaborative systems can be a viable manufacturing solution, but efficient control and communication are required for operations to be carried out effectively and safely. Design/methodology/approach – The integrated system consists of facial recognition, static pose recognition and dynamic hand motion tracking. Each sub-system has been tested in isolation before integration and demonstration of a sample task. Findings – It is demonstrated that the combination of multiple gesture control methods can increase its potential applications for industrial robots. Originality/value – The novelty of the system is the combination of a dual gesture controls method which allows operators to command an industrial robot by posing hand gestures as well as control the robot motion by moving one of their hands in front of the sensor. A facial verification system is integrated to improve the robustness, reliability and security of the control system which also allows assignment of permission levels to different users. [ABSTRACT FROM AUTHOR]
- Published
- 2015
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234. The Essential Constituents of Flexible Assembly Systems: A Case Study in the Heavy Vehicle Manufacturing Industry.
- Author
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Asadi, Narges, Fundin, Anders, and Jackson, Mats
- Subjects
MANUFACTURING industries ,AUTOMOBILE industry ,FLEXIBLE manufacturing systems ,PRODUCTION engineering ,PROCESS control systems - Abstract
The major challenge of today's manufacturing industry in tackling demands for a wider range of products with short life-cycle times and meeting customisation requirements has drawn considerable attention towards flexibility in manufacturing systems. As a prominent part of a manufacturing system, an assembly system provides a platform for increasing efficiency while delivering various market demands. However, owing to the dearth of a unified and clear definition of the constituents of flexible assembly systems, in both theory and practice, the recognition of flexibility in assembly systems still remains elusive. In order to establish a sound base for discussing the constituents of flexible assembly systems, this research paper explores the literature concerning flexibility in manufacturing and assembly as well as in flexible systems management domains. To reflect an industrial perspective, a multiple case study of five manufacturing plants in the heavy vehicle industry is performed. By identifying six essential constituents of flexibility in assembly systems, the study proposes a clear definition of flexibility in assembly systems which mainly revolves around mix and volume flexibility. To further enhance the findings, the compatibility of a few previously identified types of manufacturing flexibility in the assembly systems of the case plants is investigated and additional dimensions of flexibility in assembly systems are revealed. Finally, the implications for theory and practice as well as suggestions for future research are discussed. [ABSTRACT FROM AUTHOR]
- Published
- 2015
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235. Optimal Sparse Designs for Process Flexibility via Probabilistic Expanders.
- Author
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Xi Chen, Jiawei Zhang, and Yuan Zhou
- Subjects
FLEXIBLE manufacturing systems ,AUTOMATION ,PRODUCTION engineering ,GRAPH theory ,GEOMETRY - Abstract
We study the problem of how to design a sparse flexible process structure in a balanced and symmetrical production system to match supply with random demand more effectively. Our goal is to provide a sparsest design to achieve (1 - ∈) - optimality relative to the fully flexible system. In a balanced system with n plants and n products, Chou et al. (2011) proved that there exists a graph expander with O arcs to achieve (1 - ∈)-optimality for every demand realization. Wang and Zhang (2015) showed that the simple k-chain design with O (n / ∈) arcs can achieve (1 - ∈)-optimality in expectation. In this paper, we introduce a new concept called probabilistic graph expanders. We prove that a probabilistic expander with O (nln(1/∈)) arcs guarantees (1 - ∈)-optimality with high probability (w.h.p.), which is a stronger notion of optimality as compared to the expected performance. Easy-to-implement randomized and deterministic constructions of probabilistic expanders are provided. We show our bound is best possible in the sense that any structure should need at least Ω(nln(1/∈)) arcs to achieve (1 - ∈)-optimality in expectation (and hence w.h.p.). We also show that in order to achieve (1 - ∈)-optimality in the worst case, any design would need at least Ω (n/∈) arcs; and in order to achieve (1 - ∈)-optimality in expectation, k-chain needs at least Ω(n/∈) arcs. [ABSTRACT FROM AUTHOR]
- Published
- 2015
- Full Text
- View/download PDF
236. Caso productivo en una celda de manufactura flexible.
- Author
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Bernal Loaiza, María Elena, Piedrahita Monroy, Julián Alejandro, and Rivas Oyuela, Carlos Andrés
- Abstract
This article presents a designed productive case which includes the virtual laboratories of the Universidad Tecnologica Pereira's Industrial Faculty, it means the flexible manufacturing cell and the mobile logistics laboratory; this case was named "PR ATV's production case". It was structured in trying to imitate a real process of production of ATVs with their logistics process. There is described the form in which is designed the adaptations of existing resources within the manufacturing cell with the aim of to execute the process in the laboratory. [ABSTRACT FROM AUTHOR]
- Published
- 2015
- Full Text
- View/download PDF
237. An extendible reconfigurable robot based on hot melt adhesives.
- Author
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Brodbeck, Luzius and Iida, Fumiya
- Subjects
ADHESIVES ,RECONFIGURABLE robots ,AUTONOMOUS robots ,ROBUST control ,MANIPULATORS (Machinery) ,THERMOPLASTICS - Abstract
The ability to physically enlarge one's own body structures plays an important role in robustness and adaptability of biological systems. It is, however, a significant challenge for robotic systems to autonomously extend their bodies. To address this challenge, this paper presents an approach using hot melt adhesives (HMAs) to assemble and integrate extensions into the robotic body. HMAs are thermoplastics with temperature dependent adhesiveness and bonding strength. We exploit this property of HMAs to connect passive external objects to the robot's own body structures, and investigate the characteristics of the approach. In a set of elementary configurations, we analyze to which extent a robot can self-reconfigure using the proposed method. We found that the extension limit depends on the mechanical properties of the extension, and the reconfiguration algorithm. A five-axis robot manipulator equipped with specialized HMA handling devices is employed to demonstrate these findings in four experiments. It is shown that the robot can construct and integrate extensions into its own body, which allow it to solve tasks that it could not achieve in its initial configuration. [ABSTRACT FROM AUTHOR]
- Published
- 2015
- Full Text
- View/download PDF
238. Stretching and trimming of high-speed train panels using multi-point tooling.
- Author
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Liu, C. G., Zhang, X. G., Zhang, S. L., and Liu, X. Z.
- Subjects
- *
CUTTING (Materials) , *STRETCHING of materials , *COMPOSITE materials , *REINFORCED plastics , *MATERIALS science - Abstract
Traditional tool was difficult to achieve digitisation and precision in manufacturing high-speed train panels. Thus, multi-point tooling was proposed as a novel and flexible manufacturing equipment. In this paper, the principle and implementation of multi-point tooling were described, and the key techniques in stretching and trimming process were discussed. To verify the feasibility and manufacturing effects in application, typical high-speed train panels forming process was carried out with multi-point tooling and commercial finite-element software, respectively. Comparison and analysis of strain distribution, thinning rate in thickness and shape errors were made between simulation results and experimental results. The results show consistency and may provide instructive guidance on high-speed train panels manufacturing. [ABSTRACT FROM AUTHOR]
- Published
- 2015
- Full Text
- View/download PDF
239. Reusing industrial robots to achieve sustainability in small and medium-sized enterprises (SMEs).
- Author
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Bi, Z.M., Liu, Yanfei, Baumgartner, Blane, Culver, Eric, Sorokin, J.N., Peters, Amanda, Cox, Blaine, Hunnicutt, Jessica, Yurek, John, and O’Shaughnessey, Stephen
- Abstract
Purpose – The purpose of this paper is to illustrate the importance of redesigning, reusing, remanufacturing, recovering, recycling and reducing (6R) to sustainable manufacturing and discuss the general procedure to reconfigure robots. Two critical challenges in adopting industrial robots in small and medium-sized enterprise (SMEs) are flexibility and cost, as the number of tasks of the same type can be limited because of the size of an SME. The challenges can be alleviated by 6R. The 6R processes allow a robot to adopt new tasks, increase its utilization rate and reduce unit costs of products. Design/methodology/approach – There is no shortcut to implement sustainable manufacturing. All of the manufacturing resources in a system should be planned optimally to reduce waste and maximize the utilization rates of resources. In this paper, modularization and reconfiguration are emphasized to implement 6R processes in sustainable manufacturing; robots are especially taken into consideration as core functional modules in the system. Modular architecture makes it feasible to integrate robots with low-cost customized modules for various tasks for the high utilization rates. A case study is provided to show the feasibility. Findings – Finding the ways to reuse manufacturing resources could bring significant competitiveness to an SME, in the sense that sophisticated machines and tools, such as robots, can be highly utilized even in a manufacturing environment with low or medium product volumes. The concepts of modularization and 6R processes can be synergized to achieve this goal. Research limitations/implications – The authors propose the strategy to enhance the utilization rates of core manufacturing resources using modular architecture and 6R practice. The axiomatic design theory can be applied as the theoretical fundamental to guide the 6R processes; however, a universal solution in the implementation is not available. The solutions have to be tailored to specific SMEs, and the solutions should vary with respect to time. Practical implications – To operate a sustainable manufacturing system, a continuous design effort is required to reconfigure existing resources and enhance their capabilities to fulfill new tasks in the dynamic environment. Social implications – The authors focus on the importance of sustainable manufacturing to modern society, and they achieve this goal by reusing robots as system components in different applications. Originality/value – Sustainable manufacturing has attracted a great deal of attention, although the operable guidance for system implementation is scarce. The presented work has thrown some light in this research area. The 6R concept has been introduced in a modular system to maximize the utilizations of critical manufacturing resources. It is particularly advantageous for SMEs to adopt sophisticated robots cost-effectively. [ABSTRACT FROM AUTHOR]
- Published
- 2015
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240. Management trends in textiles and clothing
- Author
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de Araújo, Mário
- Published
- 1997
- Full Text
- View/download PDF
241. Process Centred versus Resource Centred Modelling for Flexible Production Lines.
- Author
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Fiedler, Claudia and Meyer, Wolfgang
- Subjects
ROBOTICS ,COMPUTER simulation ,ALGORITHMS ,PETRI nets ,GALVANIZING ,FACTORIES - Abstract
We describe a resource oriented modelling method for robotic flowshops and examplify it on a galvanic plant. We compare the process oriented modelling method with the resource oriented method. The resulting simulation tool can be used for the design of scheduling algorithms. Solutions can be found to compromise between the use of resources and productivity of the plant. [ABSTRACT FROM AUTHOR]
- Published
- 2008
242. Ensuring economic efficiency of flexible fixtures in multiproduct manufacturing
- Author
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Ivanov, Vitalii Oleksandrovych, Liaposhchenko, Oleksandr Oleksandrovych, Denysenko, Yuliia Oleksandrivna, and Pavlenko, Ivan Volodymyrovych
- Subjects
multiaxis machining ,cost of machining ,flexible manufacturing ,fixture design - Abstract
The first-priority directions for modern engineering, especially for multiproduct manufacturing, include the intensification of manufacturing processes, increasing the efficiency of technological equipment, and reducing the time required to implement technological solutions. Fixture design is a complicated and time-consuming process that requires considering many parameters of the closed-loop technological system “machine tool — fixture — cutting tool — workpiece”. One machined part can have several fixture layouts corresponding to all specified parameters; however, their effectiveness differs depending on production conditions. Search for an optimal fixture for specified production conditions is an essential stage of production planning. It has been proved that the efficiency of a manufacturing process should be assessed using single economic indicator — the cost of machining, which considers the costs of time, the total costs for process realisation, and a batch of parts. The paper aims to substantiate the efficiency of manufacturing processes in machining complex parts using flexible fixtures by developing a mathematical model that considers the cost of time, the cost of implementing the manufacturing process, and the batch value of parts production. This approach estimates the efficiency of manufacturing processes for machining complex parts and choosing the flexible fixture layout that corresponds to specific production conditions. It was proved that flexible fixtures could be effectively used for machining small batches of parts with frequent readjustments to new workpieces and short-term machining. A tendency has been established that the higher number of nomenclature of parts contributes to expanding the scope of the effective use of flexible fixtures.
- Published
- 2021
243. Supervised hand-guidance during human robot collaborative task execution: A case study
- Author
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Cacace J., Caccavale R., Finzi A., Cacace, J., Caccavale, R., and Finzi, A.
- Subjects
Intention recognition ,Flexible manufacturing ,Human-Robot collaboration ,Hand-guidance - Abstract
We present and discuss a human-robot collaboration system suitable for supervising the execution of structured manipulation tasks in industrial assembly scenarios. As a case study, we consider the application domain proposed in the context of the project (PON R& I 2014-2020) ICOSAF (Integrated collaborative systems for Smart Factory) in which a human operator physically interacts with a collaborative robot (Cobot) to perform multiple item insertion tasks in a shared workspace. The proposed system combines hierarchical task orchestration and human intention recognition during human-robot interaction through hand-guidance. We provide an overview of the system discussing an initial experimental evaluation.
- Published
- 2021
244. Autonomous Mobile Robots in Small Batch Size Production
- Author
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Rajala, Emmi, Tekniikan ja luonnontieteiden tiedekunta - Faculty of Engineering and Natural Sciences, and Tampere University
- Subjects
batch production ,flexible manufacturing ,adaptive automation ,Autonomous mobile robots ,Automaatiotekniikan DI-ohjelma - Master's Programme in Automation Engineering - Abstract
This thesis concentrates on autonomous mobile robots (AMRs) in small batch size produc-tion. The main objective was to determine sales arguments for autonomous mobile robot usage in production environment. This objective was approached by finding answers to three research questions about deployment aspects, suitable tasks, and current market state. The research started by studying literature about autonomous mobile robots, and other sub-jects that were strongly linked to the thesis subject. In addition, the results of prior surveys were studied. Four research methods were used for finding answers to the research questions. Those methods were literature review, case study, reference case review and open survey. All the used methods were found to be suitable for this purpose but delimitation to the small batch size manufacturing was proven to be difficult in most of these methods. By studying mobile robot related standards and other literature, deployment aspects were found and then tested and fulfilled in case study. These two methods were also used for gath-ering a list of benefits and disadvantages. To find suitable tasks for AMRs in production envi-ronment were searched by doing a reference case review. These tasks were then complement-ed by open survey results. Understanding of the current market state was also gained from the open survey results. The reliability of the collected research data was discussed, and each result were analyzed and validated using suitable qualitative or quantitative methods. Data-driven analysis was per-formed to the literature review results to form categorized and summarized lists of the deploy-ment aspects and AMR benefits and disadvantages. The case study data was analyzed using deductive method. Descriptive statistical analysis was performed for the reference case review data to form visual graphs. Same data analysis methods were used also for the open survey data also for graph formation. All the validation was done mainly by comparing the results to literature or to recent surveys. Even though some results could not be generalized, due to limited data and delimitation dif-ficulties, useful results were able to achieve. The most significant result was the deployment aspects because research concentrating on that field seem to be lacking. The deployment as-pects were dived into the sales and implementation phase. Many of the found advantages like flexibility and fast payback time are commonly known, but some of the disadvantages were not so common. The AMRs are not so plug and play type of products that they are generally marketed to be. Examples of suitable tasks for AMRs were mostly found from automotive and electrical industry and those tasks were mainly production material handling related. The current market seems to be open minded towards AMRs, but the knowledge of AMRs is mainly lack-ing. Sales arguments were then formed by combining the analyzed answers for the research questions. At the end, conclusions are made.
- Published
- 2021
245. Data-driven framework to improve collaborative human-robot flexible manufacturing applications
- Author
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Fiorella Sibona and Marina Indri
- Subjects
Human-robot collaboration ,Computer science ,Control (management) ,Data-driven framework ,Mobile robot ,Flexible manufacturing, Human-robot collaboration, Data-driven framework, Mobile robotics ,Mobile robotics ,Human–robot interaction ,Flexible manufacturing ,Data-driven ,Data modeling ,Anthropocentrism ,Human–computer interaction ,Robot ,Electronics - Abstract
The manufacturing assembly lines of the future are foreseen to dismiss fully unmanned systems in favour of anthropocentric solutions. However, bringing in the human complexity leads to modeling and control questions that only data can answer. Moreover, many human-robot collaborative applications in flexible manufacturing involve manipulator cobots, whereas little attention is given to the role of mobile robots. This work outlines a data-driven framework, which is the core of a brand new project to be fully developed in the very next future, to let human-robot collaborative processes overcome the barriers to successful interaction, leveraging mobile and fixed-base robots.
- Published
- 2021
246. Approximation to the measurement of Backorder impact on flexible manufacturing systems
- Author
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Juan-José Bravo, Juan Pablo Orejuela, and Zuzet Menduiña
- Subjects
flexible manufacturing ,group technology ,backorders ,production planning and control ,Engineering (General). Civil engineering (General) ,TA1-2040 - Abstract
This document studies the implications of considering or not pending orders (hereinafter called "backorders") in production planning, control and configuration models in flexible manufacturing systems (SMF). In many of the models that attempt to study SMF, the backorder is not considered, and in those in which it is considered, it is included as a passive variable where the impact it may have on said systems and especially its relationship has not been explicitly noted. with the demand pattern. In the present investigation, direct benefits of the inclusion of backorders were identified in capacity utilization, in workload balancing between groups of Machines (cells) and in inventory levels. Finally, it is proposed to use the economic concept of elasticity to measure the real impacts between the backorder and other production factors, a novel strategy in this type of application and which may be the subject of future research.
- Published
- 2013
- Full Text
- View/download PDF
247. Integration of mobile manipulators in an industrial production.
- Author
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Madsen, Ole, Bøgh, Simon, Schou, Caspe, Andersen, Rasmus Skovgaard, Damgaard, Jens Skov, Pedersen, Mikkel Rath, and Krüger, Volker
- Abstract
Purpose - The purpose of this study has been to evaluate the technology of autonomous mobile manipulation in a real world industrial manufacturing environment. The objective has been to obtain experience in the integration with existing equipment and determine key challenges in maturing the technology to a level of readiness suitable for industry. Despite much research within the topic of industrial mobile manipulation, the technology has not yet found its way to the industry. To mature the technology to a level of readiness suitable for industry real-world experience is crucial. This paper reports from such a real-world industrial experiment with two mobile manipulators. Design/methodology/approach - In the experiment, autonomous industrial mobile manipulators are integrated into the actual manufacturing environment of the pump manufacturer Grundfos. The two robots together solve the task of producing rotors; a task constituted by several sub-tasks ranging from logistics to complex assembly. With a total duration of 10 days, the experiment includes workspace adaptation, safety regulations, rapid robot instruction and running production. Findings - With a setup time of less than one day, it was possible to program both robots to perform the production scenario in collaboration. Despite the success, the experiment clearly demonstrated several topics in need of further research before the technology can be made available to the industry: robustness and cycle time, safety investigations and possibly standardization, and robot and workstation re-configurability. Originality/value - Despite the attention of research around the world, the topic of industrial mobile manipulation has only seen a limited number of real-world integrations. This work reports from a comprehensive integration into a real-world running production and thus reports on the key challenges identified from this integration. [ABSTRACT FROM AUTHOR]
- Published
- 2015
- Full Text
- View/download PDF
248. A model for kitting operations planning.
- Author
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Caputo, Antonio C., Pelagagge, Pacifico M., and Salini, Paolo
- Subjects
KITTING (Manufacturing process) ,OPERATING costs ,FLEXIBLE manufacturing systems ,ASSEMBLY line methods ,MATERIALS handling ,WORK in process - Abstract
Purpose -- The aim of this paper is to develop a detailed descriptive model for kitting operations, allowing resources sizing and computation of systems' economic performances. Design/methodology/approach -- A mathematical model allows to size resources, given product characteristics and production mix, and determines total system costs by assessing relevant cost items including investment costs (vehicles, containers, storage racks), direct operating costs (transport and kitting workforce, vehicles energy consumption and maintenance, quality costs), indirect operating costs (space requirements, work in process (WIP) and safety stock holding costs, administration and control). Findings -- The choice of parts delivery supply to assembly lines requires a thorough economic comparison of alternatives. However, existing models are often simplistic and neglect many critical factors which affect the systems' performances. As a consequence, industries are unsure about which system is best for their environment. This model allows assessment of the cost and suitability of kitting in any specific industrial setting. Results of the model application are case-specific and cannot be generalized, but the major impact of labour and error correction cost has been highlighted. Research limitations/implications -- The model at present focusses on the in-house kitting systems based on travelling kits concept only. Although all quantitative cost drivers are included, some context-related qualitative decision factors are not yet included. The model assumes that the information about product structure and part requirements is known and that a preliminary design of the assembly system (i.e. line balancing) has been carried out. Practical implications -- Production managers are given a quantitative decision tool to properly assess the implementation of kitting policies at an early decision stage. This allows exploring the trade-offs between the alternatives and properly planning the adoption of kitting systems, as well as comparing kitting with alternative material supply methods. Originality/value -- With respect to previous simplified literature models, this new approach allows quantification of a number of additional factors which are critical for successful implementation of cost-effective kitting systems, including kitting errors. An exhaustive cost estimation of kitting systems in multiple, mixed-model assembly lines is thus permitted. Paper type Research paper [ABSTRACT FROM AUTHOR]
- Published
- 2015
- Full Text
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249. Smart manufacturing of electric vehicles
- Author
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Bahadir Tunaboylu, Selim Zaim, Busra Alptekin, and Pietro Perlo
- Subjects
Chassis ,Electric vehicles ,business.industry ,Supply chain ,Automotive industry ,ComputerApplications_COMPUTERSINOTHERSYSTEMS ,Original equipment manufacturer ,Sustainable supply chain ,Manufacturing engineering ,Flexible manufacturing ,Product (business) ,Monopolistic competition ,Advanced manufacturing technology ,Advanced manufacturing ,Factory ,Business ,Sustainable production - Abstract
International Symposium for Production Research, ISPR 2020 -- 24 September 2020 through 26 September 2020 -- -- 250869 The future of the manufacturing sector is evolving with the Industry 4.0, and its repercussions are felt in the factory, the business, product launch and also impacts customer aspects in the overall cycle. These technological innovations create opportunities for new disruptive entries to the market, for instance in automotive manufacturing. It is well known that the automotive industry is under the control of large OEMs since the very beginning. It is very difficult to compete as a newcomer because the production process of the Internal Combustion Engine (ICE) and the chassis require high technology, investment, and a well-defined supply chain that create a monopolistic environment for the sector. Therefore, we propose a microfactory concept as a novel manufacturing method that allows a quicker entry for new players in the automotive industry especially for electric vehicles (EVs). The microfactory described in this paper, presents an alternative solution to overcome the existing monopolies with the electric motor, a tubular chassis allows for lean manufacturing, and a novel supply chain model. Digital transformation shows itself in production systems by Industry 4.0 applications and more recently in the blockchain-based supply chain applications are being investigated. Further, a detailed cost analysis to compare conventional car manufacturing and microfactory concept EV manufacturing are presented. In addition, the blockchain technology is proposed to improve the supply chain of EV manufacturing. This study indicates that the microfactory provides flexible and customized production of urban electric vehicles minimizing both ecological footprint and total investment. © 2021, The Editor(s) (if applicable) and The Author(s), under exclusive license to Springer Nature Switzerland AG.
- Published
- 2020
250. Development of a Low-Cost, High Accuracy, Flexible Panel Indexing Cell with Modular, Elastic Architecture
- Author
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Adam Roberts, Robert Brownbill, Electroimpact UK Ltd, Svetan Ratchev, TC 5, and WG 5.5
- Subjects
Computer science ,business.industry ,Search engine indexing ,02 engineering and technology ,Modular design ,Reconfigurable tooling ,Flexible manufacturing ,Reliability engineering ,Variable (computer science) ,020303 mechanical engineering & transports ,Development (topology) ,020401 chemical engineering ,0203 mechanical engineering ,Modular architecture ,Aerospace panel indexing ,Production (economics) ,[INFO]Computer Science [cs] ,0204 chemical engineering ,Architecture ,business ,Aerospace ,Bespoke - Abstract
Part 4: Assembly Cells and Systems; International audience; The global aerospace industry is driving a demand for flexible manufacturing systems to accommodate multiple programs with variable capacities within a modular, economical production cell [1]. Traditional manufacturing cells often involve bespoke, monolithic hardware limited to single program use. This inherent restraint results in significant incurred costs and program disruption when reacting to design and capacity changes. This paper describes the development of a reconfigurable panel-indexing cell with a dynamic cost architecture as an alternative approach to established, monolithic tooling structures.
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- 2020
- Full Text
- View/download PDF
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