摘要
磨削加工过程中，工件表面材料的去除是磨粒冲击、切削、划擦等综合作用的结果。为了研究磨削过程中的冲击现象，针对450钢工件，运用DEFORM-3D软件对单颗磨粒对工件表面的冲击强化过程进行有限元仿真，获得了工件内部应力场的分布情况，对磨削过程中工件表面等效应力与应变率进行了分析，得到了磨削参数对磨削过程的影响规律。对等效应力的分析表明：磨削过程中，工件受力是由很多脉冲力合成的。对应变率的分析表明：磨粒对工件表面的冲击强化效应显著。实验研究结果验证了理论与仿真分析结果的正确性，采用的仿真方法可有效分析与预测工件表面强化层指标。
The removal of surface material is the comprehensive result of impact, cutting and scratches by abrasive grains in the process of grinding. In order to study the impact during the grinding process, we took 45# steel as the research object and carried on finite element simulation about the impacting process to the workpiece＇ s surface by DEFORM-3D software. The impact was functioned by single abrasive grain. Through the simulation, we got the distribution of stress field of internal workpiece, analyzed the equivalent stress and strain rate of surface of workpiece in the process of grinding, and obtained the influence of grinding parameter on grinding. The analysis of equivalent stress reflected that grinding force is made up of a lot of surging force. The analysis of strain rate indicated that the impact and hardening effect to the surface of workpiece by abrasive grains is remarkable existing. The results of the experiment verified the correctness of the results of theoretical analysis and simulation. The DEFORM 3D simulation method could analyze and predict the parameter of surface hardened layer effectively.
出处
《金刚石与磨料磨具工程》
CAS
2014年第5期50-55,共6页
Diamond & Abrasives Engineering
基金
沈阳市科学技术计划项目(F13-316-1-59)
关键词
单颗磨粒
冲击
磨削加工
强化
single abrasive grain
impact
grinding
harden
