基于DEFORM3D的伺服阀芯端面磨削毛刺形成仿真

为研究磨粒不同排布方式对磨削毛刺形成的影响，对伺服阀阀芯材料端面磨削过程进行简化，利用DEFORM3D对单颗磨粒在叶序、错位和随机3种排布形式下的磨削过程建模并进行磨削有限元仿真，分析3种不同磨粒排布方式下的侧边毛刺形成过程，比较其磨削毛刺高度。结果表明:在叶序排布下，2颗磨粒中间接触边处存在高度较为稳定的毛刺；在错位排布下，2颗磨粒的磨削轨迹基本重合，耕犁的工件表面两侧形成毛刺；在随机排布下，2颗磨粒的磨削轨迹存在重叠，2颗磨粒接触边处材料挤压隆起特征更显著，容易形成二次毛刺。使用叶序排布的砂轮更有利于加工中控制毛刺的高度。 

Burr formation simulation of end face grinding core of servo valve based on DEFORM3D

In order to investigate the effect of abrasive grain arrangement on the grinding burr formation, the end face grinding process of the servo valve core was simplified to design a grinding simulation with a single abrasive grain. The grinding process, in which the abrasive grains were arranged in the forms of leaf, dislocation or random, was modeled and simulated utilizing the commercial software DEFORM3D. The side burrs under the three different abrasive grain arrangements were analyzed and the burr heights were also compared. The results show that under the leaf arrangement, there are relatively stable burrs at the contact edge between the two abrasive grains; the tracks of the two abrasive grains coincide basically and burrs are formed on both sides of the workpiece surface of plough under the dislocation arrangement; under the random arrangement, the track of the two abrasives overlaps and the extrusion characteristics of the material at the contact edge of the two abrasives are more remarkable, thus easily forming secondary burrs. The burr height can be controlled effectively when utilizing the grinding wheel with leaf arrangement.