摘要
切削过程表层材料特性变化容易引起表面疲劳破坏等现象。通过对钛合金TC4进行车削试验,研究进给量对表层晶粒塑性变形的影响规律,利用有限元仿真对TC4切削过程模拟,获得切削表面温度和应力。试验与仿真结合,探究TC4切削表层晶粒变化、切削表面温度和应力间的联系。研究结果表明:随着进给量的增大,TC4已加工表层塑性变形程度呈现增大趋势,表面温度和应力随进给量增大也增大。在表面温度和应力的综合作用下,表层晶粒出现拉长和弯曲变形,越靠近表面处变形越明显。
Changes of surface material characteristics during the cutting process can easily cause surface fatigue damage.By cutting test of titanium alloy TC4,the influence law of feed rate on surface grain plastic deformation was studied,the TC4 cutting process was simulated using finite element simulation to obtain the cutting surface temperature and stress.Combined with experiment and simulationand,the connection between TC4 cutting surface grain change,cutting surface temperature and stress were explored.The results show that the plastic deformation degree of TC4 machined surface increases with the increase of feed rate,and the surface temperature and stress also increase with the increase of feed rate.Under the combination of surface temperature and stress,the surface grains appear elongated and torsional deformation,and the closer to the surface,the more obvious.
作者
张浩
李金泉
ZHANG Hao;LI Jinquan(School of Mechanical Engineering,Shenyang Ligong University,Shenyang 110159,CHN)
出处
《制造技术与机床》
北大核心
2022年第8期27-32,共6页
Manufacturing Technology & Machine Tool
基金
国家自然科学基金资助项目(51775357)。
关键词
钛合金
表层特性
塑性变形
表面应力
表面温度
titanium alloy
surface properties
plastic deformation
surface stress
surface temperature
作者简介
第一作者:张浩,男,1997年生,硕士研究生,研究方向为切削理论与先进制造技术。E-mail:zhangh9705@163.com;通信作者:李金泉,男,1965年生,教授,硕士生导师,研究方向为切削理论与先进制造技术。E-mail:li_jinquan@163.com。
