In the invention, the pole shoe walls and the heat conduction layer are placed in a vacuum furnace and then welded into one by diffusion welding by adopting a diffusion welding tool.
本发明采用扩散焊工装，将极靴壁和导热层放置于真空炉中通过扩散焊焊接为一体。
2
The interior circumferential wall of the connecting pole can be equipped with the thread hole or the taper hole connecting with a machine tool and an electric drill.