小切深条件下磨削加工表面的温度场及表面完整性

基于矩形热源模型对小切深磨削加工表面温度场进行了建模及数值仿真.采用45钢作为工件材料,研究了磨削过程中不同磨削参数条件下工件表层温度场分布规律及表层金相组织特征.结果表明:在小切深条件下,磨削区的最高温度随着磨削深度的增加或者工件速度的降低而增大,磨削深度对表层最高温度的影响大于工件速度的影响;工件速度对表层温度梯度的影响大于磨削深度的影响,磨削区温度并未完全达到相变温度.

Grinding Surface Temperature Field and Surface Integrity Under Small Depth of Cut

The rectangular heat source model was used for modeling and numerical simulating the grinding surface temperature field under small depth of cut. The 45 steel was chosen as workpriece material, and the surface temperature distributions and characteristic microstructure were studied under different grinding parameters. The results showed that the maximum temperature of the grinding area increases with increasing the grinding depth or decreasing the workpiece rate under small depth of cut. The effect of grinding depth on the maximum surface temperature is greater than that of workpiece rate. While the effect of workpiece rate on the surface temperature gradient is greater than that of grinding depth. The temperature does not fully reach the transition point in the grinding zone.