Protection tool for preventing induction heating heat affected zone from being too long

The invention discloses a protection tool for preventing an induction heating heat affected zone from being too long. The protection tool is characterized in that a thread arranged at one end of a protective sleeve (1) is screwed into one end of a heat insulation reducing sleeve (2), a handle (4) is inserted into the other end of the heat insulation reducing sleeve (2), a fastening screw (3) is screwed for fixing, and a heating coil (5) is installed at the other end of the protective sleeve (1). According to the protection tool, the requirements of high-temperature endurance performance and anti-fatigue performance in special performance of a high-end fastener part can be met, induction heating is uniform, and the product quality is good. 本发明公开了一种防止感应加热热影响区过长的保护工装，其特征在于；保护套筒（1）一端设置的螺纹拧入隔热转接套（2）一端，隔热转接套（2）另一端插入手柄（4）拧入紧固螺钉（3）固定，保护套筒（1）另一端安装有加热线圈（5）。本发明可以满足高端紧固件部分特殊性能中的高温持久性能、抗疲劳性能要求，感应加热均匀，产品质量好。