局部感应钎焊砂轮的热变形分析

Thermal Deformation Analysis of Local Induction Brazed Grinding Wheel

针对局部感应钎焊砂轮基体在高温环境的热变形问题,采用简化的热源模型对砂轮基体的应力分布与热变形进行有限元分析。结果显示:砂轮基体的残余应力主要分布在钎焊工作面附近,且越靠近工作面,残余应力越大;当扫描速度为0.5 mm/s时,不同钎焊温度下的砂轮基体变形量均最小。扫描速度过慢或过快均会导致砂轮基体产生较大的变形。局部感应钎焊试验显示,实际变形量与仿真值的误差在5%以内,表明仿真模型准确,仿真结果具有参考价值。

For the problem of high temperature deformation of local induction brazing grinding wheel matrix, a simplified heat source model was used to simulate the stress distribution and thermal deformation of grinding wheel matrix. The results show that the residual stress of grinding wheel matrix is mainly distributed near the brazing working face, and the closer to the working face, the bigger the residual stress. When the scanning speed is 0.5 mm/s, the peak value of grinding wheel matrix deformation is the minimum under different brazing temperature. Too slow or too fast scanning speed will lead to bigger deformation of the grinding wheel matrix. The local induction brazing test shows that the error between the actual deformation values and the simulation results is less than 5%, which proves that the simulation model is accurate and the simulation results are valuable.