The Experts below are selected from a list of 5997 Experts worldwide ranked by ideXlab platform
Dominiek Reynaerts - One of the best experts on this subject based on the ideXlab platform.
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real time on machine observations close to interelectrode gap in a tool based hybrid laser electrochemical microMachining process
Scientific Reports, 2020Co-Authors: Krishna Kumar Saxena, Xiaolei Chen, Maria Rosaria Vetrano, Jun Qian, Dominiek ReynaertsAbstract:A tool-based hybrid laser-electrochemical microMachining process involves concurrent application of two process energies i.e. electrochemical and laser in the same Machining zone by means of a hybrid tool which serves as an ECM tool as well as a multimode waveguide. It is a relatively novel process finding applications in defect-Free Machining of difficult-to-cut materials without affecting their microstructure. In order to understand the physical phenomena occurring during this process, in-situ observations are required. Therefore, in this work, a real time observation was carried out of a novel tool-based hybrid laser electrochemical microMachining process. A combination of high-speed imaging and Large Scale Particle Image Velocimetry (LSPIV) was used to visualize the tool-based hybrid laser-ECM process in real time. It also allowed to carry out experimental investigations on the by-products and bubble generation which have a direct effect on process performance in terms of accuracy and efficiency. The real-time on-machine observations are unique of its kind and they will facilitate the understanding of underlying mechanisms governing this hybrid laser-electrochemical microMachining process. This will ultimately help in improving the quality of parts manufactured. This research is also a step forward towards making these physics-based hybrid processes deterministic by employing high-speed imaging in a closed loop control.
Xiaolei Chen - One of the best experts on this subject based on the ideXlab platform.
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real time on machine observations close to interelectrode gap in a tool based hybrid laser electrochemical microMachining process
Scientific Reports, 2020Co-Authors: Krishna Kumar Saxena, Xiaolei Chen, Maria Rosaria Vetrano, Jun Qian, Dominiek ReynaertsAbstract:A tool-based hybrid laser-electrochemical microMachining process involves concurrent application of two process energies i.e. electrochemical and laser in the same Machining zone by means of a hybrid tool which serves as an ECM tool as well as a multimode waveguide. It is a relatively novel process finding applications in defect-Free Machining of difficult-to-cut materials without affecting their microstructure. In order to understand the physical phenomena occurring during this process, in-situ observations are required. Therefore, in this work, a real time observation was carried out of a novel tool-based hybrid laser electrochemical microMachining process. A combination of high-speed imaging and Large Scale Particle Image Velocimetry (LSPIV) was used to visualize the tool-based hybrid laser-ECM process in real time. It also allowed to carry out experimental investigations on the by-products and bubble generation which have a direct effect on process performance in terms of accuracy and efficiency. The real-time on-machine observations are unique of its kind and they will facilitate the understanding of underlying mechanisms governing this hybrid laser-electrochemical microMachining process. This will ultimately help in improving the quality of parts manufactured. This research is also a step forward towards making these physics-based hybrid processes deterministic by employing high-speed imaging in a closed loop control.
Krishna Kumar Saxena - One of the best experts on this subject based on the ideXlab platform.
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real time on machine observations close to interelectrode gap in a tool based hybrid laser electrochemical microMachining process
Scientific Reports, 2020Co-Authors: Krishna Kumar Saxena, Xiaolei Chen, Maria Rosaria Vetrano, Jun Qian, Dominiek ReynaertsAbstract:A tool-based hybrid laser-electrochemical microMachining process involves concurrent application of two process energies i.e. electrochemical and laser in the same Machining zone by means of a hybrid tool which serves as an ECM tool as well as a multimode waveguide. It is a relatively novel process finding applications in defect-Free Machining of difficult-to-cut materials without affecting their microstructure. In order to understand the physical phenomena occurring during this process, in-situ observations are required. Therefore, in this work, a real time observation was carried out of a novel tool-based hybrid laser electrochemical microMachining process. A combination of high-speed imaging and Large Scale Particle Image Velocimetry (LSPIV) was used to visualize the tool-based hybrid laser-ECM process in real time. It also allowed to carry out experimental investigations on the by-products and bubble generation which have a direct effect on process performance in terms of accuracy and efficiency. The real-time on-machine observations are unique of its kind and they will facilitate the understanding of underlying mechanisms governing this hybrid laser-electrochemical microMachining process. This will ultimately help in improving the quality of parts manufactured. This research is also a step forward towards making these physics-based hybrid processes deterministic by employing high-speed imaging in a closed loop control.
Tetsuo Shiraga - One of the best experts on this subject based on the ideXlab platform.
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Machinability of BN Free-Machining steel in turning
International Journal of Machine Tools & Manufacture, 2007Co-Authors: Ryutaro Tanaka, Yasuo Yamane, Katsuhiko Sekiya, Norihiko Narutaki, Tetsuo ShiragaAbstract:Abstract In the past few years, extensive researches have been done to improve the machinability of work materials in order to increase productivity and reduce the effect on the environment. To satisfy these demands, various Free-Machining steels have been researched and developed. One of them is BN Free-Machining steel that contains hexagonal boron nitride (h-BN). However, the machinability was not stable. In this study, Machining tests were carried out to clarify the machinability of steels and appropriate chemical composition of work material and tool material to achieve high efficient Machining. Tested work materials were plane carbon steel JIS S45C and BN Free-Machining steels. The JIS S45C was used as the standard. The tool wear in turning BN Free-Machining steel was smaller than that in turning standard steel. In case of turning BN1 with P30 at 200, 300 m/min, the wear progress rate of flank wear and crater depth were about half as much as that in turning standard steel. BN Free-Machining steel showed slightly lower cutting temperature and smaller cutting force in comparison with standard steel at the tested cutting speeds. Al and N were detected as a layer at the tool wear region of P grade carbide tools after turning BN Free-Machining steel at high cutting speed. It is thought that one of the main reasons of outstanding machinability of BN Free-Machining steel is that the deposited layer containing Al and N acts as diffusion barrier at the tool–chip interface. In turning larger Al content BN-added steel with higher Ti content cutting tools, a larger wear reduction was observed. Therefore, it is said that not only added BN but also appropriate Al is necessary in work material.
Erkan Konca - One of the best experts on this subject based on the ideXlab platform.
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The effect of Free-Machining elements on dry Machining of B319 aluminum alloy
Journal of Materials Processing Technology, 2009Co-Authors: Jean M. Dasch, C. C. Ang, C. A. Wong, R. A. Waldo, B. R. Powell, David Chester, A.m. Weiner, Y.t. Cheng, Erkan KoncaAbstract:The ability to machine aluminum dry would have enormous benefits in reduced infrastructure, lower costs and a cleaner environment compared to today's practice of wet Machining. However, that goal has been impractical due to the build-up of hot aluminum on tools in the absence of the lubrication and cooling supplied by metal removal fluids. While experimenting with tool coatings to enable dry Machining, it was discovered that trace amounts of Free-Machining elements in the aluminum alloy greatly improved dry machinability. In the present study, small quantities (
