感应加热钎焊金刚石砂轮过程基体温度场变化分析

Analysis of the Change of Temperature Field of Brazing Diamond Grinding Wheel Matrix During the Induction Heating Process

文章采用ANSYS有限元方法分析了在高频感应加热钎焊金刚石砂轮时砂轮基体的温度场分布规律。建立感应加热的简化模型,运用磁-热耦合的方法求解计算,分析砂轮基体的温度分布随加热时间、加热功率及位置的变化规律。结果表明,砂轮基体温度随加热快速升高;加热功率越高,加热速度越快,基体内孔和外圆表面的温度差越大,且这差值随着时间的增长而增大。砂轮外圈的应力约为内圈应力的两倍,外圈的热变形最大,内圈的热变形最小。热应力作用下,砂轮的内孔扩大。

Distribution regularity of the temperature field of brazing diamond grinding wheel matrix during the high frequency induction heating process has been analyzed through finite element analysis.The regularity of temperature distribution of wheel matrix changing with heating time,heating power and position has been analyzed through simplified model of the induction heating and magneto-thermal coupled analysis.Result shows that the temperature of the wheel matrix increases rapidly when heated;the heating rate becomes higher as the heating power gets higher,and bigger temperature difference between matrix inner hole and cylindrical surface has been produced.This difference becomes bigger as time progresses.The stress of the outer ring of the grinding wheel is twice as much as that of the inner ring.The outer ring has maximum thermal deformation while the inner ring has minimum thermal deformation.The inner hole of the grinding wheel expands under heat stress conditions.