基于SPH方法的磨削机理仿真研究  

Simulation study of grinding mechanism based on SPH

作　　者：徐士龙[1] 林建中[1] 杨玉廷[1] 

机构地区：[1]上海理工大学机械工程学院,上海200090

出　　处：《制造技术与机床》2012年第12期136-139,共4页Manufacturing Technology & Machine Tool

基　　金：国家重大科技专项(2011ZX04004-051)

摘　　要：采用光滑粒子流体动力学(SPH)法对单颗粒磨粒磨削过程进行了数值仿真。从工件材料的应力分布和变形情况以及切屑的形成情况对不同磨削深度和磨粒负前角下的仿真结果进行了分析。结果显示:基于SPH法的磨削仿真可以很好地解释磨削过程中工件材料的弹塑性变形行为和切屑的形成情况;在磨削过程中存在着一个刚好产生切屑的临界磨削深度;仿真中不同磨削深度下比磨削能的变化与磨削过程中的尺寸效应现象一致;随着磨粒负前角的增大,挤压作用增强而切削作用减弱,磨粒的挤压作用对工件表面质量具有重要影响。In order to investigate the mechanism of grinding,a SPH（smoothed particle hydrodynamics） method is used for single abrasive grain grinding simulation.The simulation of different grinding depth and negative rake angle of abrasive grain are analyzed according to the stress and deformation of workpiece material,and grinding chip formation mechanism.The results show that：the SPH method for grinding simulation can well explain the behavior of elastic and plastic deformation of workpiece material,and the mechanism of chip formation.There is a critical grinding depth that can just produce chips.The specific grinding energy on different grinding depth in the simulation can accord with the size effect of grinding.With the increase of negative rake angle of abrasive grain,the influence of extrusion is increasing and the influence of cutting is decreasing.The influence of extrusion is important for the quality of part surface.

关 键 词：比磨削能 单颗粒磨粒 光滑流体动力学法 负前角 

分 类 号：TG580.1[金属学及工艺—金属切削加工及机床]