GH4169材料磨削后数控抛光表面完整性试验研究*

高世民; 陈志同

doi:10.16080/j.issn1671-833x.2016.23/24.052

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GH4169材料磨削后数控抛光表面完整性试验研究*

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- GH4169材料磨削后数控抛光表面完整性试验研究*
- 航空制造技术 2016年59卷第23/24期
- 作者机构：
  
  北京航空航天大学机械工程及自动化学院,北京,100191
- 作者简介：
- 基金信息：
- DOI：10.16080/j.issn1671-833x.2016.23/24.052
  中图分类号：
- 纸质出版：2016
- 稿件说明：
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高世民，全芳，陈志同. GH4169材料磨削后数控抛光表面完整性试验研究*[J]. 航空制造技术, 2016, 59(23/24): 52-56. GAO Shimin, QUAN Fang, CHEN Zhitong. Research on Surface Integrity for GH4169 of CNC Polishing After Grinding. Aeronautical Manufacturing Technology, 2016, 59(23/24): 52-56.

GAO Shimin, QUAN Fang. Research on Surface Integrity for GH4169 of CNC Polishing After Grinding[J]. Aeronautical Manufacturing Technology, 2016, 59(23/24).
高世民，全芳，陈志同. GH4169材料磨削后数控抛光表面完整性试验研究*[J]. 航空制造技术, 2016, 59(23/24): 52-56. GAO Shimin, QUAN Fang, CHEN Zhitong. Research on Surface Integrity for GH4169 of CNC Polishing After Grinding. Aeronautical Manufacturing Technology, 2016, 59(23/24): 52-56. DOI： 10.16080/j.issn1671-833x.2016.23/24.052.

GAO Shimin, QUAN Fang. Research on Surface Integrity for GH4169 of CNC Polishing After Grinding[J]. Aeronautical Manufacturing Technology, 2016, 59(23/24). DOI： 10.16080/j.issn1671-833x.2016.23/24.052.

摘要

针对航空发动机叶片材料GH4169 高温合金，采用CBN 砂轮磨削后进行羊毛毡轮数控抛光。首先，研究了抛光预压量对抛光轮寿命和工件表面粗糙度的影响，找到了抛光轮寿命的评价方法和优化的预压量；然后，研究了抛光深度对磨削后GH4169 表面完整性的影响。结果表明：表面粗糙度Ra 随抛光深度的增加先减小后稳定，表面显微硬度HV 随抛光深度的增加呈显著下降趋势，进给方向表面残余正应力随深度增加先升高后下降，而垂直进给方向表面残余正应力先基本不变后下降。最终试验优选出了深度参数为2μm，预压量0.5~1.0mm。采用羊毛毡轮对GH4169 磨削表面进行抛光，既能达到较小的表面粗糙度值（Ra=0.3μm），又可以有效维持CBN 砂轮磨削形成的两个方向较大的表面残余应力。

Abstract

For the blade material GH4169

the process of CNC polishing after CBN wheel grinding was conducted. Firstly

the influence of the pre-compression parameter on life of wool wheel and the roughness were studied. The influences of polishing depth on the surface topographic characters of surface integrity including surface roughness

surface micro-hardness

and surface residual stress

were studied to optimize the polishing depth. With the increasing of the polishing depth

the roughness Ra drops firstly and then gets stable

and the surface micro-hardness decreases. The normal residual stress in the feed direction shows a trend from rise to decline

while in the vertical feed direction

it stays unchanged basically and then decreases. The polishing depth after optimized is 2μm

and pre-compression parameter is about from 0.5mm to 1.0mm. It has a small roughness of 0.3μm

a macro-hardness of HV389.36 and the high compressive stresses after CBN grinding

which are -871.6MPa and -1084.0MPa for two principal stress directions.

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