感应加热在曲轴红套工艺中的应用

Application of induction heating to crankshaft shrinkage fitting

基于电磁感应加热及热传导理论,通过建立包含感应线圈、曲柄臂和空气体在内的三维有限元分析模型,借助ANSYS软件对曲柄臂在感应加热过程中的温度场分布规律及热变形情况进行数值仿真研究.结果表明,通过在曲臂孔内设置圆形线圈,并在位于主轴颈与曲柄销之间的曲臂外围设置矩形线圈,当两个线圈电流密度合理设置时,在一定感应加热时间内,曲臂孔四周温度分布均匀,曲轴具有良好的红套工艺质量,印证了感应加热用于曲轴红套工艺的可行性.

Based on the theories of induction heating and thermal conductivity,and by establishing a three-dimensional finite element analysis model including the induction coil,crank cheek and air,the pattern of temperature field distribution and thermal deformation condition of the crank cheek during the period of induction heating were numerically simulated with software ANSYS.The simulation result showed that,by setting a circular coil inside the hole of the crank cheek and a rectangular coil between the hole and the crankpin and by defining a proper current density in the two coils a uniform temperature field around the hole would be obtained after a certain period of induction heating.As a result,the crankshaft would reach a high-quality shrinkage fitting,manifesting the feasibility of the application of induction heating to the crankshaft shrinkage fitting.