组合机床与自动化加工技术
組閤機床與自動化加工技術
조합궤상여자동화가공기술
Modular Machine Tool & Automatic Manufacturing Technique
2015年
9期
31-33,37
,共4页
光滑质点流体动力学方法%单颗磨粒%光学玻璃%数值仿真
光滑質點流體動力學方法%單顆磨粒%光學玻璃%數值倣真
광활질점류체동역학방법%단과마립%광학파리%수치방진
smoothed particle hydrodynamics ( SPH) method%single grain%optical glass%numeral simula-tion
采用光滑质点流体动力学( SPH)方法，将金刚石磨粒简化为带有尖端圆弧的圆锥，对单颗金刚石磨粒在不同切削速度下切削光学玻璃的过程进行了三维数值仿真。仿真结果表明使用SPH方法可以很好地模拟脆性材料被切削过程的本构行为。通过分析单层SPH粒子被磨粒切削的过程，还原了工件整体被磨削的宏观过程；通过分析切削速度对单颗磨粒切削形成沟槽的形状以及工件残余应力的影响，得出当切削深度一定时，提高的切削速度可获得更大的材料去除率以及更好的光学玻璃磨削表面的结论。
採用光滑質點流體動力學( SPH)方法，將金剛石磨粒簡化為帶有尖耑圓弧的圓錐，對單顆金剛石磨粒在不同切削速度下切削光學玻璃的過程進行瞭三維數值倣真。倣真結果錶明使用SPH方法可以很好地模擬脆性材料被切削過程的本構行為。通過分析單層SPH粒子被磨粒切削的過程，還原瞭工件整體被磨削的宏觀過程；通過分析切削速度對單顆磨粒切削形成溝槽的形狀以及工件殘餘應力的影響，得齣噹切削深度一定時，提高的切削速度可穫得更大的材料去除率以及更好的光學玻璃磨削錶麵的結論。
채용광활질점류체동역학( SPH)방법，장금강석마립간화위대유첨단원호적원추，대단과금강석마립재불동절삭속도하절삭광학파리적과정진행료삼유수치방진。방진결과표명사용SPH방법가이흔호지모의취성재료피절삭과정적본구행위。통과분석단층SPH입자피마립절삭적과정，환원료공건정체피마삭적굉관과정；통과분석절삭속도대단과마립절삭형성구조적형상이급공건잔여응력적영향，득출당절삭심도일정시，제고적절삭속도가획득경대적재료거제솔이급경호적광학파리마삭표면적결론。
Based on SPH (smoothed particle hydrodynamics) method, the 3D numeral simulation of single di-amond grain cutting of optical glass under different cutting speeds was carried out by simplifying diamond grain as corn shape with tip arc. The simulation results shows that the constitutive behavior of brittle materials during cutting process can be properly simulated by using SPH method. By analyzing the cutting process of single layer SPH particles, the macroscopic process of grinding was illustrated. By comparing the slot dimen-sions and residual stress after the cutting process, it is concluded that with specified cutting depth, greater ma-terial removal rate and better optical glass grinding surface can be achieved by increasing cutting speed.
