Residual Stress of High Speed Cylindrical Grinding of 18CrNiMo7-6 Steel

被引：6
|
作者：
Zhang Y. [1 ]
Yang X. [1 ]
Yuan S. [1 ]
Zhu J. [2 ]
Wang D. [1 ]
机构：
[1] Henan Key Engineering Laboratory of Anti-fatigue Manufacturing Technology, Zhengzhou University, Zhengzhou
[2] State Key Laboratory of Superabrasives, Zhengzhou
来源：
Zhongguo Jixie Gongcheng/China Mechanical Engineering | 2021年 / 32卷 / 05期
关键词：
Cubic boron nitride(CBN); High speed cylindrical grinding; Highspeed grinding; Residual stress; Split fixture;
D O I：
10.3969/j.issn.1004-132X.2021.05.005
中图分类号：
学科分类号：
摘要：
In order to investigate the effects of high-speed cylindrical grinding processes on the residual stress distributions of 18CrNiMo7-6 steel, high-speed grinding tests were carried out by using ceramic bond CBN grinding wheels, and single factor tests were carried out to analyze the influences of wheel speed vs, workpiece speed vw, radial feed rate vf and granularity of grinding wheels. An auxiliary split fixture used for cylindrical workpiece outer surfaces was designed and made. The X-Ray diffractometer was used to detect stress distributions of workpieces. The results show that the high-speed grinding processes may produce compressive stress on surfaces of the workpieces. The residual stress on the surface increases slightly with the increase of wheel speed vs. The effects of workpiece speed and feed speed on the surfaces stress is not obvious. The stress distributions in X and Y directions are almost the same, while the one in Y direction is slightly larger. The feed speed has a great influence on the stress distribution, with the thickness of the influenced layer reaching 100~150 μm, and the tensile stress appears. The influence of the wheel speed on stress distribution is less than the feed speed. When the wheel speed is 60 m/s, distribution of residual stress is "tower-shape". The workpiece speed has no obvious influence rule. The granularity of 230/270 has a great influence on the stress distribution, depth of the stress influenced layer is 80~100 μm, and the granularity of 120/140 and W20 on the distribution is close. The auxiliary fixture effectively improves the accuracy and efficiency of the residual stress, and the detection efficiency is more than doubled. © 2021, China Mechanical Engineering Magazine Office. All right reserved.
引用
收藏
页码：540 / 546
页数：6
相关论文
共 13 条
  • [1] SHENG Xiaomin, Ultra-high-speed Grinding Technology, (2010)
  • [2] YANG L, FU Y C, XU J H, Et al., Ultra-high-speed Grinding-theoretical Basis and Development of a Grinding Machine Tool, Key Engineering Materials, 589, 590, pp. 293-298, (2013)
  • [3] GAO Yukui, Surface Integrity Theory and Application, (2014)
  • [4] HE Bolin, DENG Haipeng, Research Status and Development Trend of Surface Integrity, Surface Technology, 44, 9, pp. 140-146, (2015)
  • [5] LI Bomin, ZHAO Bo, LI Qing, Abrasives, Abrasives and Grinding Technology, (2016)
  • [6] ZHU Dahu, Research on High-speed External Cylindrical Grinding Mechanism of Difficult-to-cut Materials and Its Surface Integrity, (2011)
  • [7] CHEN Xin, WANG Dong, LIU Yufan, Effect of Grinding 18CrNiMo7-6 Gear Steel in High Speed Grinding on Residual Stress, Machinery Design and Manufacture, 9, pp. 80-83, (2017)
  • [8] CHEN Xin, WANG Dong, LIU Yufan, Influence of High Speed Grinding on Surface Integrity of 18CrNiMo7-6, Surface Technology, 47, 9, pp. 259-265, (2018)
  • [9] NI J, LI B, PANG J., High-speed Cylindrical Grinding of SiC: the Process Characteristics and Surface Integrity, Ceramic Engineering and Science Proceedings, 14, 1, pp. 70-76, (2013)
  • [10] NI J, LI B., Phase Transformation in High-speed Cylindrical Grinding of SiC and Its Effects on Residual Stresses, Materials Letters, 89, pp. 150-152, (2012)
12