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Characterization of machined surface quality and near-surface microstructure of a high speed thrust angular contact ball bearing

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Journal of Materials Science & Technology 2021年第27期86卷 219-226页

作者： Di Wu Xiao-Chen Zhang Yi-Feng Li Jianqiu Wang En-Hou Han Institute of Metal Research Chinese Academy of Sciences62 Wencui RoadShenyang110016China School of Materials Science and Engineering University of Science and Technology of China72 Wenhua RoadShenyang110016China Institute of Materials Shanghai University99 Shangda RoadShanghai200072China

Bearings are one of the most important components in modern *** contact fatigue(RCF)initiating from surface and subsurface is the major failure *** this paper,a typical high speed thrust angular contact ball bearing was selected,and the machined surface quality and near-surface microstructure of the race-way and rolling ball were systematically characterized by using of a probe surface profiler,white light interferometer,optical microscopy(OM),scanning electron microscopy(SEM),electron backscatter diffraction(EBSD)and transmission electron microscopy(TEM)combined with focused ion beam(FIB).Two kinds of precursor,probably resulting in pitting or spalling during the following rolling contact,were *** is the defects on the surface of either the race-way or the rolling ball,such as heavy machining marks,scratches and *** other is nano-crystalline layer due to machining,in the outermost layer around the surface of *** results may well lay foundation for our further research on RCF with the real part of such typical rolling bearings.

关键词： Rolling bearing GCr15 Race-way Rolling ball machined surface quality surface nano-crystalline layer

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Experimental Research on the surface quality of Milling Contour Bevel Gears

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Chinese Journal of Mechanical Engineering 2023年第1期36卷 115-128页

作者： Mingyang Wu Jianyu Zhang Chunjie Ma Yali Zhang Yaonan Cheng School of Mechanical and Power Engineering Harbin University of Science and TechnologyHarbin150080China The Key Laboratory of National and Local United Engineering for“High-Efficiency Cutting and Tools” Harbin150080China

Contour bevel gears have the advantages of high coincidence,low noise and large bearing capacity,which are widely used in automobile manufacturing,shipbuilding and construction ***,when the surface quality is poor,the effective contact area between the gear mating surfaces decreases,affecting the stability of the fit and thus the transmission accuracy,so it is of great significance to optimize the surface quality of the contour bevel *** paper firstly analyzes the formation process of machined surface roughness of contour bevel gears on the basis of generating machining method,and dry milling experiments of contour bevel gears are conducted to analyze the effects of cutting speed and feed rate on the machined surface roughness and surface topography of the ***,the surface defects on the machined surface of the workpiece are studied by SEM,and the causes of the surface defects are analyzed by *** that,XRD is used to compare the microscopic grains of the machined surface and the substrate material for diffraction peak analysis,and the effect of cutting parameters on the microhardness of the workpiece machined surface is investigated by work hardening *** research results are of great significance for improving the machining accuracy of contour bevel gears,reducing friction losses and improving transmission efficiency.

关键词： Contour bevel gear machined surface quality surface roughness surface defect surface morphology

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Status of research on non-conventional technology assisted single-point diamond turning

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Nanotechnology and Precision Engineering 2023年第3期6卷 79-92页

作者： Zhuang Chen Guangjun Chen Zhiwei Yu Jiashuai Huang Hong Wei Tianjin Key Laboratory of High Speed Cutting and Precision Processing Tianjin 300222China School of Mechanical Engineering Tianjin University of Technology and EducationTianjin 300222China

With the increasing use of difficult-to-machine materials in aerospace applications,machining requirements are becoming ever more ***,traditional single-point diamond turning(SPDT)can cause surface damage and tool ***,it is difficult for SPDT to meet the processing requirements,and it has significant *** indicates that supplementing SPDT with unconventional techniques can,importantly,solve problems due to the high cutting forces and poor surface quality for difficult-to-machine *** paper first introduces SPDT and reviews research into unconventional techniques for use with *** machining mechanism is discussed,and the main advantages and disadvantages of various methods are ***,hybrid SPDT is briefly described,which encompasses ultrasonic-vibration magnetic-field SPDT,ultrasonic-vibration laser SPDT,and ultrasonic-vibration cold-plasma *** with the traditional SPDT method,hybrid SPDT produces a better optical surface *** current status of research into unconventional techniques to supplement SPDT is then ***,future development trends and the application prospects of unconventional assisted SPDT are discussed.

关键词： Single-point diamond turning machined surface quality Tool wear Unconventional auxiliary technique

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