摘要
在长时间连续加工情况下,即使稳定控制工艺参数,磁流变抛光材料去除效率仍会出现下降.通过仿真认为,去除效率的下降对于大口径工件的高精度修形而言不可忽略.通过材料去除机理分析、磁流变液微粒观测以及X射线衍射测试,认为去除函数发生变化是磁流变液中抛光颗粒消耗所致.基于液体抛光效率随抛光颗粒浓度增大而趋于饱和的规律,提出了定时定量添加过饱和磁流变抛光液使去除函数得到稳定控制的方法.通过实验,去除函数体积去除效率在达到饱和后波动率小于1!.最后对大口径光学元件进行修形,验证了控制方法的有效性.
Under long time and continuous process status, the magnetorheological finishing （MRF） removal efficiency will decline even if technical parameters are well controlled. Simulation reveals that the decline of removal efficiency should not be ignored in high precision figuring for large-caliber workpieces. According to material removal mechanism, observation of magnetorheological fluid particles and X-ray diffraction （XRD） results, it can be concluded that the loss of polishing particles in magnetorheological fluid caused the decline of removal efficiency. Considering the removal efficiency saturation phenomenon of polishing liquid, the method for removal function stability control is proposed, which refers to adding supersaturated magnetorheological fluid in time and in quantity. In experiment, the fluctuation rate of removal function volume removal efficiency was less than 1% after reaching the saturation point. At last, applying the control method to high precision figuring of large caliber workpieces, the validity of the method is verified.
出处
《纳米技术与精密工程》
CAS
CSCD
北大核心
2016年第1期14-20,共7页
Nanotechnology and Precision Engineering
基金
国家自然科学基金资助项目(51275521)
新世纪优秀人才计划资助项目(NCET-12-0144)
关键词
磁流变抛光
连续加工
稳定性
magnetorheological finishing
continuous process
stability
