摘要
航空钛合金零件在铣削加工时表面会产生残余应力层,不仅影响零件的尺寸精度,还严重影响零件的疲劳性能。因此,研究航空钛合金零件铣削加工表面的残余应力分布与变化十分必要。以TC4钛合金条形零件为研究对象,采用化铣剥层法,测试并分析不同铣削用量条件下已加工表面残余应力的分布与变化规律。研究结果表明,TC4钛合金条形零件已加工表面层的残余应力沿层深方向逐渐由压应力变为拉应力;随着切削速度和每齿进给量的提高,残余应力值均相应降低;而随着径向切深的增大,残余压应力值则相应增加。
The residual stress layer is produced on the aviation titanium alloy parts＇ surface during the milling process,it affects the dimensional accuracy and fatigue properties of parts greatly. So it is very important to make a study of the distribution and change of the surface residual stress in titanium alloy parts for aeronautics astronautics. This paper takes TC4 titanium alloy bar parts as research objects and uses the milling peeling method to tests and analyze the distribution and the change law of the residual stress of the processed surface under different processing parameters. The research results show that,the residual stress of the processed surface of TC4 titanium alloy bar parts is gradually changed form the pressure stress to tensile stress along the direction of deep layer; With the increase of cutting speed and each tooth feed,the residual stress of the machined surface is accordingly reduced; With the increase of radial cutting depth,it is accordingly increased.
出处
《机械制造与自动化》
2016年第2期25-27,35,共4页
Machine Building & Automation
基金
教育部"高等学校博士学科点专项科研基金"(20123218120025)
国防技术基础科研项目(C1520120002)
关键词
TC4钛合金
表面残余应力
加工参数
化铣剥层法
TC4 titanium alloy
surface residual stress
processing parameters
milling peeling method
