摘要
离子束加工时工件温升较高,由此会产生热应力和热变形,影响加工精度。基于实际抛光测试了离子束加工过程中工件表面温度场分布,利用ANSYS软件对工件热变形进行了仿真分析,采用均匀抛光的方法研究了热应力和热变形对工件面形精度的影响。研究结果显示:离子束抛光过程中工件的温度可能会升至200℃,工件总变形量最大可达30μm;工件装夹应力是热变形能否恢复的关键,当工件装夹应力较小时,热变形对加工精度影响很小。
The temperature of the workpiece in the Ion Beam Figuring（IBF） is much high, that will generate thermal stress and hot deformation. Therefore, the thermal effect in the IBF is one of the most important factors to the polishing accuracy. The temper- ature field of the workpiece during the IBF process was tested in a practical experiment. Also the hot deformation of the workpiece was calculated in the ANSYS software. The effect of the thermal stress and hot deformation was also investigated in a practical u- niform polishing experiment. The study shows：the temperature may rise to 200℃ and the hot deformation may be 30μm. Clamp stress of the workpiece is key to the hot deformation after the polishing. When the clamping stress is much smaller,it will hardly affect the polishing accuracy.
出处
《现代制造工程》
CSCD
北大核心
2013年第9期83-86,共4页
Modern Manufacturing Engineering
基金
中国工程物理研究院重点发展基金项目(2009A0203012)
关键词
离子束抛光
热效应
热变形
装夹应力
Ion Beam Figuring（IBF）
thermal effect
hot deformation
clamp stress
