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拉伸装夹对TC4钛合金铣削表面质量的影响

许鸿昊1 左敦稳1 朱笑笑1 张振金2 赵 灿2王 珉1   

  1. 1南京航空航天大学 机电工程学院，江苏 南京210016
    2黑龙江科技学院 机械工程学院，黑龙江 哈尔滨 150027
  • 收稿日期:2006-11-09 修回日期:2007-09-10 出版日期:2008-01-31 发布日期:2008-01-31

Influence of Stretching Fixation on TC4 Ti Alloy Milling Surface Quality

XU Hong-hao1, ZUO Dun-wen1, ZHU Xiao-xiao1, ZHANG Zhen-jin2, ZHAO Can2, WANG Min1   

  1. 1. Colledge of Mechanical & Electrical Engineering, Nanjing University of Aeronautics & Astronautics, Nanjing, 210016, China
    2. Department of Mechanical Engineering, Heilongjiang University of Science & Technology, Harbin, 150027, China
  • Received:2006-11-09 Revised:2007-09-10 Online:2008-01-31 Published:2008-01-31

被引次数

2

摘要： 在TC4钛合金铣削过程中采用拉伸装夹技术强化表面质量。建立平面应变的残余应力形成模型，分析了拉伸装夹改变加工表层残余应力的机理。采用单向机械式拉伸夹具在HSM-600U型五轴超高速加工中心上进行了拉伸装夹铣削试验，铣削速度从38m/min到566m/min，拉伸装夹力从0到6330 N，其他加工条件保持不变，测量了加工表面粗糙度和表层残余应力分布, 讨论了拉伸装夹对加工表面质量的影响，实验结果表明，拉伸装夹基本不影响表面粗糙度，但可以大大提高加工表面残余压应力并增大残余压应力层的厚度。

关键词: TC4钛合金, 拉伸装夹铣削, 表面粗糙度, 残余应力, 表面质量

Abstract: Stretching fixation was proposed to improve milling surface quality of TC4 Ti alloy. A plane strain model was developed to analysis the residual stress variation of stretching-fixation milling surface. With a unidirectional mechanical stretching fixture, a stretching-fixation milling experiment was completed on an HSM-600U five axis super-high speed machining center. This was done with the milling speed ranging from 38m/min to 566m/min and the stretching force from 0 to 6330N, and other parameters being kept constant. Surface roughness and residual stress distribution were measured. Experimental results show that stretching fixation has little effect on surface roughness, while increases surface residual compression stress and thickness of residual compression stress layer significantly.

Key words: TC4 Ti alloy, stretching-fixation milling, surface roughness, residual stress, surface quality