七辊辊皮是我厂七辊矫直机上的关键件之一,其淬火质量的好坏直接影响机加工生产,在实际生产中,七辊辊皮的硬度和淬硬层均能达到要求,但辊皮淬火时的内孔胀大量不易控制,内孔胀大量有大有小,所以在淬火时的预留胀大量不易给出,淬火后内孔不够磨的现象时有发生,给机加工生产造成很大麻烦。所以调整热处理工艺,找出内孔变形 Seven roller roller skin is a key part of our seven-roller straightening machine, the quality of its quenching directly affects the machining production, in the actual production, the hardness of the seven-roll roller and hardened layer can meet the requirements, However, when the roller skin hardening large amount of hard to control the inner hole is not easy to control, a large number of internal hole bulging large and small, so a large number of pre-expansion in quenching is not easy to give, after quenching the phenomenon of insufficient wear bore, to machine processing Production caused a lot of trouble. So adjust the heat treatment process to find the hole deformation