高弹性合金钢的微细磨削仿真

Simulation of High Elastic Alloy Micro-grinding

挠性接头刚性差,在微细磨削加工中易变形,其精度难以控制.为了提高挠性接头的工作性能,重点研究了挠性接头细颈的磨削工艺参数及其表面质量.基于磨削加工、弹塑性力学和有限元法等理论,利用ABAQUS模拟单颗磨粒微细磨削高弹性合金钢,分析磨削工艺参数对磨削力、热的影响规律,并用专业金属切削软件Advantedge对残余应力进行仿真,研究工艺参数对残余应力的影响规律,为进一步提高细颈的磨削质量及挠性接头角刚度的稳定性奠定基础.研究结果表明,提高砂轮线速度,可以大大减小磨削过程对工件表面的热作用宽度和深度,有利于减小热损伤和提高表面质量.

Flexible joints are weak stiffness parts, which are easy to distort in the micro-grinding process, and it＇s difficult to control the machining accuracy. In order to rise the performance of the flexible joint, the grinding process parameters and surface quality of the neck of flexible joint are researched primarily. Based on the theory of elastic-plastic mechanics, a finite element model of single grain of micro-grinding with ABAQUS is built. By using this model, the simulation is conducted to analyze the effect of the process parameters on the grinding force and temperature. Effect of process parameters on the residual stress is studied, using Advantedge professional metal cutting software. It lays a foundation for further improving the grinding quality of the neck and the angle stiffness stability of the flexible joint. The results show that improving grinding wheel line speed, the width and depth of the surface thermal effect can be greatly reduced, and the thermal damage can be reduced and the surface aualitv can he imnrnvad