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44 results on '"Wilkowski, Jacek"'

1. Defect Detection in Furniture Elements with the Hough Transform Applied to 3D Data

Author

Chmielewski, Leszek J, Laszewicz-Śmietańska, Katarzyna, Mitas, Piotr, Orłowski, Arkadiusz, Górski, Jarosław, Gawdzik, Grzegorz, Janowicz, Maciej, Wilkowski, Jacek, Podziewski, Piotr, Kacprzyk, Janusz, Series editor, Burduk, Robert, editor, Jackowski, Konrad, editor, Kurzyński, Marek, editor, Woźniak, Michał, editor, and Żołnierek, Andrzej, editor

Published
2016
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2. Detection of Surface Defects of Type ‘orange skin’ in Furniture Elements with Conventional Image Processing Methods

Author

Chmielewski, Leszek J., Orłowski, Arkadiusz, Śmietańska, Katarzyna, Górski, Jarosław, Krajewski, Krzysztof, Janowicz, Maciej, Wilkowski, Jacek, Kietlińska, Krystyna, Hutchison, David, Series editor, Kanade, Takeo, Series editor, Kittler, Josef, Series editor, Kleinberg, Jon M., Series editor, Mattern, Friedemann, Series editor, Mitchell, John C., Series editor, Naor, Moni, Series editor, Pandu Rangan, C., Series editor, Steffen, Bernhard, Series editor, Terzopoulos, Demetri, Series editor, Tygar, Doug, Series editor, Weikum, Gerhard, Series editor, Huang, Fay, editor, and Sugimoto, Akihiro, editor

Published
2016
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6. Influence of cutting parameters on the tool life for WC-Co composites in the machining of wood-based materials.

Author

Wachowicz, Joanna, Wilkowski, Jacek, and Talarek, Szymon

Subjects
MACHINING, CUTTING tools, FRACTURE toughness, CUTTING (Materials), PARTICLE board, LONGEVITY
Abstract

WC-Co cemented carbides are the most commonly used material for machining wood-based materials. They owe their popularity to good properties, such as hardness and, at the same time, high fracture toughness. A significant impact on the properties of cemented carbides can have the method of their preparation. The durability of WC-Co tools can be improved by selecting the appropriate machining parameters. The study attempted to determine the optimum machining parameters for particleboard. The tools used in the study were both commercial blades and blades manufactured in laboratory conditions by sparkplasma sintering (SPS), using a mixture of WC6%Co powders. As part of this work, observations of the microstructure and durability tests of the blades during particleboardmilling processes were carried out. Wear of the tool was measured until loss on the contact surface VBmax, was 0.2 mm. Based on the tests, it can be concluded that when the lowest feed per tooth (Δz = 0.15 mm) was used, the tools had the longest tool life. In addition, the commercial tools covered a significantly longer cutting distance than the tools obtained using the SPS method. [ABSTRACT FROM AUTHOR]

Published
2023
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12. Modelling of the similar depth profiles of two different kinds of ions, implanted to WC-Co tools, used in wood-based material machining.

Author

BARLAK, MAREK, WILKOWSKI, JACEK, and WERNER, ZBIGNIEW

Subjects
WOOD waste, MACHINING, ARGON, ELECTRIC potential measurement, PARAMETER estimation
Abstract

Copyright of Annals of Warsaw University of Life Sciences - SGGW, Forestry & Wood Technology is the property of Wydawnictwo SGGW 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
2023

19. Effect of nitrogen ion implantation on the life time of WC-Co tools used in particleboard milling.

Author

Wilkowski, Jacek, Barlak, Marek, Böttger, Roman, Werner, Zbigniew, Konarski, Piotr, Pisarek, Marcin, Wachowicz, Joanna, Von Borany, Johannes, and Auriga, Alicja

Subjects
ION implantation, NUMERICAL control of machine tools, PARTICLE board, ION beams, ION bombardment, DEPTH profiling, NITROGEN
Abstract

This work explores an effect of nitrogen ion implantation on the life time of WC-Co tools used in particleboard milling. Nitrogen ions with different energy of 5, 50, and 500 keV and fluence of 1e17 and 5e17 cm−2 were implanted into the surface of commercially available WC-Co composite indexable knives, using the implanters with mass-separated ion beams. Both untreated and modified samples were subjected to microstructural and durability tests. Microstructural tests involved surface observation, determination of the nature of wear and cracks, determination of element depth profiles, and phase changes occurring in the modified area. Durability tests were conducted with the use of a computerized numerical control (CNC) machining center. The tests included determination of wear curves and calculation of quantities such as cutting length, relative tool life index, standard deviation, standard error, coefficient of variation and quality index and wear increases. Additionally, a histogram of the relative durability distribution of samples implanted with N+ was determined. In this study, an attempt was made to relate the durability results with the microstructure of the knives. Tools modified with a nitrogen ion beam of 50 keV showed the best durability results. [ABSTRACT FROM AUTHOR]

Published
2022
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39. Raman Spectroscopy in the investigations of indexable knives for woodbased materials machining.

Author

BARLAK, MAREK, WILKOWSKI, JACEK, WILCZOPOLSKA, MAGDALENA, WERNER, ZBIGNIEW, STASZKIEWICZ, BOGDAN, and ZAGÓRSKI, JERZY

Subjects
RAMAN spectroscopy, ELECTRON beams, CLEAVERS (Knives), PLASMA-beam interactions, MOSAIC structure
Abstract

Raman spectroscopy for examination of WC-Co tools in wood-base machining. An attempt is undertaken to apply Raman Spectroscopy for examination of WC-Co tools for wood-base machining. The virgin tools were compared with those implanted with nitrogen, modified by electron beam and plasma beam pulses. The preliminary results suggest a possibility of applying this method for fast, non-destructive analysis of phase composition and phase changes in the microstructure of the investigated tools [ABSTRACT FROM AUTHOR]

Published
2021

40. Selected Properties of Flat-Pressed Wood-Polymer Composites for High Humidity Conditions.

Author

Borysiuk, Piotr, Wilkowski, Jacek, Krajewski, Krzysztof, Auriga, Radosław, Skomorucha, Adrian, and Auriga, Alicja

Subjects
*UREA-formaldehyde resins, *HUMIDITY, *FLEXURAL strength, *MOLDS (Fungi), *FREE surfaces, *ELASTIC modulus
Abstract

This study investigated the possibility of applying flat-pressed woodpolymer composites in conditions of high humidity. The experiment involved three variants of wood-polymer composite panels 16 mm thick, and 680 kg per m3 density. The wood particles were bonded with polyethylene. The share of polyethylene in the core layer was fixed at 50%, while in the face layers the content was varied (40%, 50%, or 60%). The following parameters were examined: modulus of rupture (MOR), modulus of elasticity (MOE), internal bond (IB), screw holding (SH), thickness swelling (TS), water absorption (WA), susceptibility to drilling and milling, wettability and surface free energy, and resistance to mold. The results were compared to particleboard glued with urea-formaldehyde resin. The wood-polymer composite had lower MOR and MOE values and similar IB and SH values. The panels indicated a remarkably higher water resistance (lower TS and WA values) with good surface wettability and high resistance to mold fungi. Additionally, the composites were easier to machine, e.g. drilling or milling, in comparison to standard particleboards. [ABSTRACT FROM AUTHOR]

Published
2020
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