东北大学学报:自然科学版 ›› 2017, Vol. 38 ›› Issue (2): 244-248.DOI: 10.12068/j.issn.1005-3026.2017.02.019

• 机械工程 • 上一篇    下一篇

预应力淬硬磨削加工表面微观形貌仿真与实验

邓延生1, 宋建伟2, 修世超1, 王雨时1   

  1. (1. 东北大学 机械工程与自动化学院, 辽宁 沈阳110819; 2. 中航工业沈阳黎明发动机(集团)有限责任公司, 辽宁 沈阳110043)
  • 收稿日期:2015-09-30 修回日期:2015-09-30 出版日期:2017-02-15 发布日期:2017-03-03
  • 通讯作者: 邓延生
  • 作者简介:邓延生(1992-),男,湖南岳阳人,东北大学博士研究生; 修世超(1958-),男,辽宁凌源人,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(51375083);沈阳市科学技术计划项目(F16-205-1-02); 中央高校基本科研业务费专项资金资助项目(N140306002).

Simulation and Experiment of Micro-surface in Pre-stressed Hardening Grinding Process

DENG Yan-sheng1, SONG Jian-wei2, XIU Shi-chao1, WANG Yu-shi1   

  1. 1.School of Mechanical Engineering & Automation, Northeastern University, Shenyang 110819, China; 2.AVIC Shenyang Liming Aero-Engine
  • Received:2015-09-30 Revised:2015-09-30 Online:2017-02-15 Published:2017-03-03
  • Contact: XIU Shi-chao
  • About author:-
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摘要: 为了揭示预应力对磨削淬硬过程及表面微观形貌的影响机理,根据热弹塑性有限元理论,在不同大小的预应力作用下,以45钢试件为研究对象,使用DEFORM-3D进行单磨粒切削仿真,并结合预应力淬硬磨削实验,对等效应变、沟槽深度、表层微观组织及表面微观形貌进行分析.研究表明:施加预应力对热-机械等效应变影响较小,对微观组织转变影响明显,进而影响位错密度和晶粒体积,间接影响表面粗糙度;在预应力取值较小时,随着预应力增大表面沟槽深度减小,有利于减小表面粗糙度值,但在预应力超过某一数值后,会引起表面褶皱,反而使表面粗糙度数值增大.

关键词: 预应力淬硬磨削, 等效应变, 沟槽深度, 表面粗糙度, 仿真与实验

Abstract: To reveal the effect of pre-stressing on grinding hardening process and micro-surface, single grain cutting simulations on test specimens made of 45 steel under action of different pre-stresses were carried out by using DEFORM-3D based on the thermal-elastic-plastic finite element theory. The equivalent strain, groove depth, surface layer microstructure as well as the micro-surface were analyzed by simulation and experiment of pre-stressed hardening grinding process. The results indicate that pre-stressing has little effect on thermal-mechanical equivalent strain, but has obvious effect on microstructure transformation which has indirect effect on surface roughness by affecting the dislocation density and grain size. As the pre-stress increases within a low range, the groove depth decreases and the surface roughness value reduces. However, once the pre-stress exceeds a certain value, surface fold appears and surface roughness value increases instead.

Key words: pre-stressed hardening grinding, equivalent strain, groove depth, surface roughness, simulation and experiment

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