The Experts below are selected from a list of 243 Experts worldwide ranked by ideXlab platform
Chuanzhen Huang - One of the best experts on this subject based on the ideXlab platform.
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radial mode abrasive waterjet turning of short carbon fiber reinforced plastics
Machining Science and Technology, 2016Co-Authors: Hongtao Zhu, Chuanzhen HuangAbstract:ABSTRACTAn experimental study is carried out for single-pass radial-mode abrasive waterjet (AWJ) turning of a short carbon–fiber-reinforced polyetheretherketone (PEEK) specimen to understand the machining process and the effects of major process variables (feed speed, water pressure, abrasive mass flow rate, nozzle tilt angle, and rotational surface speed) on the major machining performance measures, that is, the depth of Cut, Material removal rate (MRR) and surface roughness. It is found that high water pressure, normal nozzle impact angle and high rotational speed with suitably selected feed speed and abrasive flow rate may be selected to achieve a high MRR without significantly compromising the surface roughness. Mathematical models for the three Cutting performance measures are then developed for use in process control.
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Radial-mode abrasive waterjet turning of short carbon–fiber-reinforced plastics
Machining Science and Technology, 2016Co-Authors: Hongtao Zhu, Chuanzhen HuangAbstract:ABSTRACTAn experimental study is carried out for single-pass radial-mode abrasive waterjet (AWJ) turning of a short carbon–fiber-reinforced polyetheretherketone (PEEK) specimen to understand the machining process and the effects of major process variables (feed speed, water pressure, abrasive mass flow rate, nozzle tilt angle, and rotational surface speed) on the major machining performance measures, that is, the depth of Cut, Material removal rate (MRR) and surface roughness. It is found that high water pressure, normal nozzle impact angle and high rotational speed with suitably selected feed speed and abrasive flow rate may be selected to achieve a high MRR without significantly compromising the surface roughness. Mathematical models for the three Cutting performance measures are then developed for use in process control.
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Finite Element Simulation of the Cutting Process for Inconel 718 Alloy Using a New Material Constitutive Model
Key Engineering Materials, 2016Co-Authors: Xiangyu Wang, Chuanzhen Huang, Jun Wang, Bin Zou, Guo Liang Liu, Hanlian LiuAbstract:Inconel 718 alloy is a typical difficult-to-Cut Material and widely used in the aerospace industry. Finite element simulation is an efficient method to investigate the Cutting process, whereby a work Material constitutive model plays an important role. In this paper, finite element simulation of the Cutting process for Inconel 718 alloy using a new Material constitutive model for high strain rates is presented. The effect of tool Cutting edge radius on the Cutting forces and temperature is then investigated with a view to facilitate Cutting tool design. It is found that as the Cutting edge radius increases, the characteristics of tool-work friction and the Material removal mechanisms change, resulting in variation in Cutting forces and temperature. It is shown that a smaller Cutting edge radius is preferred to reduce the Cutting forces and Cutting temperature.
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An investigation into the radial-mode abrasive waterjet turning process on high tensile steels
International Journal of Mechanical Sciences, 2013Co-Authors: Wei Yi Li, Chuanzhen HuangAbstract:Abstract A study of the radial-mode abrasive waterjet (AWJ) turning process is presented and discussed. An experimental investigation is carried out first to understand the Material removal process and mechanisms as well as the effect of process variables (feed speed, water pressure, abrasive mass flow rate, nozzle tilt angle, and rotational surface speed) on the depth of Cut, Material removal rate (MRR) and surface roughness when turning an AISI4340 high tensile steel. It is found that this Cutting mode is advantageous for high MRR, as compared to the traditional offset-mode turning, through the maximum use of jet energy for Material removal as well as employing the optimum jet impact angle and high workpiece surface speed. The most efficient conditions to maximize depth of Cut are found to be at the normal jet angle, higher water pressure, higher surface speed and lower feed speed. Yet, lower surface speed is not good for either MRR or surface quality. At high surface speeds, increasing the depth of Cut always comes at the expense of poorer surface quality. In order to estimate the depth of Cut on a mathematical basis, a dimensional analysis has then been conducted and a model for the depth of Cut has been developed and verified. The model predictions are found to be in good agreement with the experimental results with an average error of 0.2%.
Michael Krebs - One of the best experts on this subject based on the ideXlab platform.
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Thermal analysis in Ti-6Al-4V drilling
CIRP Annals - Manufacturing Technology, 2017Co-Authors: Ismaïl Lazoglu, Gérard Poulachon, Christophe Ramirez, Mohammad Akmal, Bertrand Marcon, Frédéric Rossi, José Outeiro, Michael KrebsAbstract:Ti-6Al-4V is commonly used especially in aerospace and biomedical industries. This alloy is known as a difficult-to-Cut Material. Due to its poor thermal properties, the heat generated during machining processes traps near Material deformation zones. This causes detrimental high temperatures for the Cutting tools. This article combines the analytical and FEM modeling techniques to estimate the temperature evolution of carbide tools in Ti-6Al-4V drilling. In this article, a novel thermocouple based temperature measurement setup is also introduced. Moreover, the simulated and measured temperatures under various Cutting conditions for the drilling of Ti-6Al-4V are presented for the validation.
Y.s. Wong - One of the best experts on this subject based on the ideXlab platform.
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application of powder suspended in dielectric fluid for fine finish micro edm of inconel 718
The International Journal of Advanced Manufacturing Technology, 2014Co-Authors: Gunawan Setia Prihandana, M Hamdi, Y.s. Wong, Tutik Sriani, Norihisa Miki, Muslim Mahardika, Kimiyuki MitsuiAbstract:Inconel 718 is an extremely hard and difficult-to-Cut Material used extensively in manufacturing because of its superior wear and corrosion resistance. Microelectrical discharge machining (micro-EDM) is one of the effective methods of machining this extremely hard Material. However, due to short circuiting and arcing, the surface of microholes produced by micro-EDM has black traces and cones. This study investigates the influence of molybdenum disulfide (MoS2) powder suspended in dielectric fluid on the performance of micro-EDM of Inconel 718 with focus in obtaining quality microholes. It was observed that MoS2 powder suspension with 50 nm of size and 5 g/l of concentration can produce better quality microholes in Inconel 718. Moreover, it was also found that 50 nm MoS2 powder was the best powder size to achieve the highest Material removal rate.
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a review on the conventional and micro electrodischarge machining of tungsten carbide
International Journal of Machine Tools & Manufacture, 2011Co-Authors: Muhammad P Jahan, M Rahman, Y.s. WongAbstract:Abstract The capability of machining intricate features with high dimensional accuracy in hard and difficult-to-Cut Material has made electrodischarge machining (EDM) process as an inevitable and one of the most popular non-conventional machining processes. In recent years, both EDM and micro-EDM processes are being used extensively in the field of mould making, production of dies, cavities and complex 3D structures using difficult-to-Cut tungsten carbide and its composites. The objective of this paper is to provide a state of the art in the field of EDM and micro-EDM of tungsten carbide and its composites. The review begins with a brief introduction on the EDM and micro-EDM processes. The research and developments in electrodischarge machining of tungsten carbide are grouped broadly into conventional EDM of tungsten carbide, micro-EDM of tungsten carbide and current research trends in EDM and micro-EDM of tungsten carbide. The problems and challenges in the area of conventional and micro-EDM of tungsten carbide and the importance of compound and hybrid machining processes are discussed. A summary of the future research directions based on the review is presented at the final section.
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a study on the quality micro hole machining of tungsten carbide by micro edm process using transistor and rc type pulse generator
Journal of Materials Processing Technology, 2009Co-Authors: Muhammad P Jahan, Y.s. Wong, M RahmanAbstract:Abstract Tungsten carbide (WC) is an extremely hard and difficult-to-Cut Material used extensively in manufacturing because of its superior wear and corrosion resistance. Besides diamond-charged grinding wheels, micro-EDM is an effective method of machining this extremely hard and brittle Material. Since micro-EDM is more generally an electro-thermal process, the supplied energy from a pulse generator is an important factor determining the performance of the micro-EDM process. This study investigates the influence of major operating parameters on the performance of micro-EDM of WC with focus in obtaining quality micro-holes in both transistor and RC-type generators. Experimental investigations were conducted with view of obtaining high-quality micro-holes in WC with small spark gap, better dimensional accuracy, good surface finish and circularity. In micro-EDM, the fabrication of micro-parts requires minimization of the pulse energy supplied into the gap which can be fulfilled using the RC-generator. It was observed that the RC-generator can produce better quality micro-holes in WC, with rim free of burr-like recast layer, good dimensional accuracy and fine circularity. Moreover, the smaller debris formed due to low discharge energy in RC-type micro-EDM can be easily flushed away from the machined area resulting in surface free of burr and resolidified molten metal. Therefore, RC-type micro-EDM could be more suitable for fabricating micro-structures in WC, where accuracy and surface finish are of prime importance.
D M Parikh - One of the best experts on this subject based on the ideXlab platform.
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surface analysis of wire electrical discharge machining processed shape memory alloys
Materials, 2020Co-Authors: Rakesh Chaudhari, Jay J Vora, Vivek Patel, L Lopez N De Lacalle, D M ParikhAbstract:Shape-memory alloys such as nitinol are gaining popularity as advanced Materials in the aerospace, medical, and automobile sectors. However, nitinol is a difficult-to-Cut Material because of its versatile specific properties such as the shape-memory effect, superelasticity, high specific strength, high wear and corrosion resistance, and severe strain hardening. Anunconventional machining process like wire-electrical-discharge-machining (WEDM) can be effectively and efficiently used for the machining of such alloys, although the WEDM-induced surface integrity of nitinol hassignificant impact on Material performance. Therefore, this work investigated the surface integrity of WEDM-processed nitinol samples using digital microscopy imaging, scanning electron microscopy (SEM), and energy-dispersive X-ray (EDX) analysis. Three-dimensional analysis of the surfaces was carried out in two different patterns (along the periphery and the vertical plane of the machined surface) andrevealed that surface roughness was maximalat the point where the surface was largely exposed to the WEDM dielectric fluid. To attain the desired surface roughness, appropriate discharge energy is required that, in turn, requires the appropriate parameter settings of the WEDM process. Different SEM image analyses showed a reduction in microcracks and pores, and in globule-density size at optimized parameters. EDX analysis revealed the absence of wire Material on the machined surface
Muhammad P Jahan - One of the best experts on this subject based on the ideXlab platform.
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a review on the conventional and micro electrodischarge machining of tungsten carbide
International Journal of Machine Tools & Manufacture, 2011Co-Authors: Muhammad P Jahan, M Rahman, Y.s. WongAbstract:Abstract The capability of machining intricate features with high dimensional accuracy in hard and difficult-to-Cut Material has made electrodischarge machining (EDM) process as an inevitable and one of the most popular non-conventional machining processes. In recent years, both EDM and micro-EDM processes are being used extensively in the field of mould making, production of dies, cavities and complex 3D structures using difficult-to-Cut tungsten carbide and its composites. The objective of this paper is to provide a state of the art in the field of EDM and micro-EDM of tungsten carbide and its composites. The review begins with a brief introduction on the EDM and micro-EDM processes. The research and developments in electrodischarge machining of tungsten carbide are grouped broadly into conventional EDM of tungsten carbide, micro-EDM of tungsten carbide and current research trends in EDM and micro-EDM of tungsten carbide. The problems and challenges in the area of conventional and micro-EDM of tungsten carbide and the importance of compound and hybrid machining processes are discussed. A summary of the future research directions based on the review is presented at the final section.
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a study on the quality micro hole machining of tungsten carbide by micro edm process using transistor and rc type pulse generator
Journal of Materials Processing Technology, 2009Co-Authors: Muhammad P Jahan, Y.s. Wong, M RahmanAbstract:Abstract Tungsten carbide (WC) is an extremely hard and difficult-to-Cut Material used extensively in manufacturing because of its superior wear and corrosion resistance. Besides diamond-charged grinding wheels, micro-EDM is an effective method of machining this extremely hard and brittle Material. Since micro-EDM is more generally an electro-thermal process, the supplied energy from a pulse generator is an important factor determining the performance of the micro-EDM process. This study investigates the influence of major operating parameters on the performance of micro-EDM of WC with focus in obtaining quality micro-holes in both transistor and RC-type generators. Experimental investigations were conducted with view of obtaining high-quality micro-holes in WC with small spark gap, better dimensional accuracy, good surface finish and circularity. In micro-EDM, the fabrication of micro-parts requires minimization of the pulse energy supplied into the gap which can be fulfilled using the RC-generator. It was observed that the RC-generator can produce better quality micro-holes in WC, with rim free of burr-like recast layer, good dimensional accuracy and fine circularity. Moreover, the smaller debris formed due to low discharge energy in RC-type micro-EDM can be easily flushed away from the machined area resulting in surface free of burr and resolidified molten metal. Therefore, RC-type micro-EDM could be more suitable for fabricating micro-structures in WC, where accuracy and surface finish are of prime importance.
