东北大学学报:自然科学版 ›› 2019, Vol. 40 ›› Issue (6): 835-840.DOI: 10.12068/j.issn.1005-3026.2019.06.014

• 机械工程 • 上一篇    下一篇

新型点磨削砂轮磨削表面/亚表面质量研究

尹国强, 巩亚东, 李雨晴, 宋俊利   

  1. (东北大学 机械工程与自动化学院, 辽宁 沈阳110819)
  • 收稿日期:2018-05-22 修回日期:2018-05-22 出版日期:2019-06-15 发布日期:2019-06-14
  • 通讯作者: 尹国强
  • 作者简介:尹国强(1983-),男,辽宁沈阳人,东北大学讲师,博士; 巩亚东(1958-),男,辽宁本溪人,东北大学教授,博士生导师.
  • 基金资助:
    国家自然科学基金资助项目(51705069,51775100); 中央高校基本科研业务费专项资金资助项目(N182410002-2).

Study on the Grinding Surface and Subsurface Quality of Novel Point Grinding Wheels

YIN Guo-qiang, GONG Ya-dong, LI Yu-qing, SONG Jun-li   

  1. School of Mechanical Engineering & Automation, Northeastern University, Shenyang 110819, China.
  • Received:2018-05-22 Revised:2018-05-22 Online:2019-06-15 Published:2019-06-14
  • Contact: YIN Guo-qiang
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摘要: 区别于传统外圆磨削,点磨削加工砂轮轴线与工件轴线不平行,而是存在倾斜角α.设计了一种带有粗磨区倾角θ的新型点磨削砂轮,这种砂轮具有磨除率大、磨削表面粗糙度小等优点.由于α和θ的存在,改变了砂轮-工件接触区的几何关系,磨削表面/亚表面质量也随之发生变化.采用制备的新型砂轮,磨削材料为QT700的工件,检测工件表面/亚表面的金相组织、加工硬化和残余应力.分析α,θ以及磨削参数对表面/亚表面质量的影响规律,给出获得最优表面/亚表面质量的工艺参数,可知新型点磨削砂轮能够提高工件表面/亚表面质量.

关键词: 新型点磨削砂轮, 金相组织, 加工硬化, 残余应力

Abstract: Different from the traditional cylindrical grinding, the axis of a grinding wheel is not parallel to the workpiece axis in the point grinding process, but rotates at an inclining angle α. A novel grinding wheel with angle θ is proposed, which is featured by high grinding rate and small surface roughness. Because of α and θ, the contact between the grinding wheel and workpiece has been changed, and the surface/subsurface quality is also changed. The novel wheels with different angles θ are used to grind QT700 workpieces. Then, the metallographic structure, work hardening and residual stress of the workpiece surface/subsurface are tested. The influence of α, θ and grinding parameters on the surface/subsurface quality is analyzed, and the process parameters for optimal surface/subsurface quality are obtained. In conclusion, the novel point grinding wheel can improve the surface/subsurface quality of workpieces.

Key words: novel point grinding wheel(NPGW), metallographic structure, work hardening, residual stress

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