以往小半径弯管的制造均采用施加反弯矩的方法，以实现控制弯管外弧侧壁厚减薄率。理论分析结果认为，采用不均匀感应加热弯制小半径弯管是可行的，并通过工艺试验证明，提高弯管内、外弧侧的加热温度差，可有效地控制弯管外弧侧的壁厚减薄率，为小半径弯管机床的优化设计和工艺制定提供了参考依据。 In the past, the manufacturing of small radius elbows all adopted the method of applying anti-bending moment so as to control the thickness reduction rate of the outer arc side wall of elbows. According to the theoretical analysis, it is feasible to use non-uniform induction heating to bend small radius elbows. Through process experiments, it is proved that increasing the heating temperature difference between the inside and outside arcs can effectively control the wall The thickness reduction rate provides a reference for the optimization design and process development of a small radius pipe bending machine.