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研究了用多个淬火感应器对半径较大的回转体表面进行中频感应淬火的作用机理,针对较大半径的回转体表面的多点式感应淬火工艺进行参数设计,建立了多点式感应淬火过程的电磁场和温度场的非线性偏微分方程组。利用有限元分析ANSYS软件来模拟多点式中频感应加热过程,其中对激励电流用表格法加载来近似地替代实际旋转工件周期性的感应淬火,从而得到了工件温度场随时间的变化规律以及最终工件的温度场分布。结果表明,多点式中频感应淬火改善了较大半径的回转体的凹槽表面淬火过程,可以达到对感应淬火工件淬硬层的要求,解决了由于不同时感应淬火所导致的软带问题。
The mechanism of medium frequency induction hardening with a large number of quenching inductors on the surface of rotating body with larger radius was studied. The parameter design of the multi-point induction quenching with larger radius was carried out. The multi-point induction hardening Nonlinear Partial Differential Equations of Electromagnetic Field and Temperature Field of Process. The finite element analysis software ANSYS was used to simulate the multi-point induction heating process, in which the excitation current was loaded by table method to approximate the periodic induction quenching of the actual rotating workpiece, and the variation law of the workpiece temperature field with time was finally obtained. Finally, Workpiece temperature distribution. The results show that multi-point IF induction hardening can improve the surface quenching process of grooves on the larger radius rotary body, which can meet the requirement of hardened layer of induction hardening workpiece and solve the soft belt problem caused by induction hardening at different times.