旋转式超声波加工机理的有限元分析  

Finite Element Analysis on the Principle of Rotary Ultrasonic Machining

作　　者：纪宇[1] 轧刚[1] 

机构地区：[1]太原理工大学机械工程学院,山西太原030024

出　　处：《机械设计与制造》2014年第10期43-45,共3页Machinery Design & Manufacture

基　　金：山西省自然科学基金项目(2005-1051)

摘　　要：利用有限元软件LS-DYNA建立了单颗磨粒旋转冲击玻璃工件的模型,计算模拟出工件受冲击的材料去除过程,分析了材料去除机理。模拟结果表明:冲击瞬间,裂纹交汇,接触区材料大片剥落;冲击过程中,工件表面裂纹开叉扩展,内部裂纹发展成亚表面层裂,磨粒持续压溃材料;切削力小,随着切削深度的增加,切削力变大。利用有限元软件LSDYNA对金刚石磨粒冲击玻璃材料的过程进行数值模拟,计算冲击过程的形变和切削力,研究工件表面和内部裂纹的产生与扩展过程,分析材料去除机理。A model on single diamond grits impacting glass artifact is established by using the finite element software LS- DYNA to compute and simulate the material removal process of workpiece and the material removal mechanism is analyzed. The simulation results show that at the impact moment the cracks meet together lead to the material peering off at a large scale. In the impact process, surface micro cracks develop into split ends cracks and internal cracks develop into the subsurface crack. And material is collapsed by grinding grain. Cutting force is very small, and with the increase of cutting depth, the cutting force increases.

关 键 词：超声加工 LS-DYNA 裂纹扩展 切削力 

分 类 号：TH16[机械工程—机械制造及自动化]