龚军振,马泳涛,吴政协,安乐乐.Al6061铣削精加工表层残余应力分布试验研究[J].表面技术,2018,47(4):281-285.
GONG Jun-zhen,MA Yong-tao,WU Zheng-xie,AN Le-le.Test of Surface Residual Stress Distribution in Al6061 after Fine Milling[J].Surface Technology,2018,47(4):281-285
Al6061铣削精加工表层残余应力分布试验研究
Test of Surface Residual Stress Distribution in Al6061 after Fine Milling
投稿时间:2017-12-09  修订日期:2018-04-20
DOI:10.16490/j.cnki.issn.1001-3660.2018.04.041
中文关键词:  Al6061  铣削精加工  残余应力  峰值  应力分布  工艺参数
英文关键词:Al6061  milling finishing  residual stress  peak value  distribution conditions  process parameters
基金项目:河南省高等学校重点科研项目(15A460030);国家自然科学基金(51650110502)
作者单位
龚军振 郑州大学 机械工程学院,郑州 450001 
马泳涛 郑州大学 机械工程学院,郑州 450001 
吴政协 郑州大学 机械工程学院,郑州 450001 
安乐乐 郑州大学 机械工程学院,郑州 450001 
AuthorInstitution
GONG Jun-zhen School of Mechanical Engineering, Zhengzhou University, Zhengzhou 450001, China 
MA Yong-tao School of Mechanical Engineering, Zhengzhou University, Zhengzhou 450001, China 
WU Zheng-xie School of Mechanical Engineering, Zhengzhou University, Zhengzhou 450001, China 
AN Le-le School of Mechanical Engineering, Zhengzhou University, Zhengzhou 450001, China 
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中文摘要:
      目的 探索铣削精加工工艺参数对Al6061工件表层残余应力的影响,提高零件的疲劳寿命。方法 设计研究了只改变其中一个参数,其他参数不变的情况下,铣削精加工Al6061工件表层残余应力的分布情况。结果 在平行于铣削进给方向(x direction)和垂直于铣削进给方向(y direction),所得表层残余应力均为压应力。随主轴转速的增大,所得工件表面残余压应力减小,残余应力最大值深度增加。当改变每齿进给时,随着每齿进给的增加,工件表面残余压应力减小,残余应力最大值出现在表面;随着铣削深度的增加,工件表面残余压应力减小,对残余应力最大值影响不大;随着铣削宽度的增加,工件表面残余压应力先减小后增大,残余应力最大值从表面向深度层移动。当主轴转速为10 000 r/min、每齿进给为0.015 mm、铣削深度为0.5 mm、铣削宽度为11.8 mm时,对表层残余应力的影响最大,影响层深约245 μm,残余压应力最大值为147.67 MPa,其峰值深度约为80 μm。结论 Al6061铣削精加工时,如果要获得较大的表面残余压应力,应该选择主轴转速、每齿进给、铣削深度、铣削宽度都较小。在切深方向,如果要获得较大残余压应力,应该选择较大的主轴转速和铣削宽度、较小的每齿进给、合适的铣削深度。
英文摘要:
      The work aims to extend fatigue life of parts by exploring effects of milling finishing process parameters on Al6061 surface residual stress of Al6061 workpiece. With only one parameter changed while other parameters unchanged, the distribution of surface residual stress on Al6061 workpiece receiving milling finishing was studied. The surface residual stress was mainly compressive stress in the directions parallel to milling feed direction (x direction) and perpendicular to milling feed direction (y direction). As spindle speed increased, surface residual compressive stress decreased, and the maximum depth of residual stress increased. As feed per tooth changed, the surface residual compressive stress of workpiece decreased as feed per tooth increase, and the maximum residual stress appeared on the surface. With the increase of milling depth, the surface residual compressive stress decreased, the maximum residual stress was slightly affected. With the increase of milling width, the surface residual compressive stress first decreased and then increased, the maximum residual stress moved from the surface to deep layer. Provided with spindle speed of 10 000 r/min, feed per tooth of 0.015 mm, milling depth of 0.5 mm and milling width of 11.8 mm, the surface residual stress was affected profoundly, depth of affected layer was about 245 μm, the maximum compressive residual stress was 147.67 MPa, and peak depth was about 80 μm. In case of Al6061 finish milling, in order to obtain higher surface residual compressive stress, lower spindle speed, feed per tooth, milling depth and milling width shall be selected. In the direction of cutting depth, in order to obtain higher surface residual compressive stress, higher spindle speed and milling width, lower feed per tooth and appropriate milling depth shall be selected.
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