基于流固耦合算法的单颗磨粒切削仿真研究(英文)  

Simulation Study of Single Grain Cutting Based on Fluid-Solid-Interaction Method

作　　者：宿崇[1] 侯俊铭[1] 朱立达[1] 王宛山[1] 

机构地区：[1]东北大学机械工程与自动化学院,沈阳110004

出　　处：《系统仿真学报》2008年第19期5250-5253,5257,共5页Journal of System Simulation

基　　金：Scientific Research Key Project Fund of the Ministry of Education of China (20060145017)

摘　　要：基于欧拉/拉格朗日耦合算法,采用四棱锥模拟磨粒的切刃,进行了单颗磨粒的三维切削仿真。该方法解决了传统有限元法进行切削仿真时易于发生单元畸变的问题。仿真结果表明,磨粒的挤压使工件材料向前方及两侧流动而产生隆起,侧向隆起高度及范围逐渐增大,形成切屑后基本保持不变;磨粒切削刃处的工件材料变形剧烈,产生较大的加工应力,在沟槽侧面及底面留下较大的残余应力并产生较高的温度;磨粒刃尖处的接触应力最大,并沿着棱边向上迅速降低。Three-dimensional cutting process of single grain in the shape of rectangular pyramid was simulated by using coupled Euler-Lagrange method. The mesh distortion problem easily caused by traditional finite element method during the cutting simulation was solved The simulation results show that workpiece material flows to the side and front owing to the pressing of cutting plane. It results in lateral protrusion of the material beside the abrasive grain. The extent of lateral protrusion increases gradually. The range and height of lateral protrusion keep invariant after chip formation. The deformation of workpiece material contacted with grain edge is very severe. Therefore there is biggish machining stress concentration happening at the contact zone of grain edge. There are biggish residual stress and cutting temperature at the side and bottom of the groove. The contact stress at edge angle of abrasive grain is biggest, and sharply decreases along the edge.

关 键 词：磨削 单颗磨粒 有限元仿真 流固耦合 

分 类 号：TG580.1[金属学及工艺—金属切削加工及机床]