The key technology for the production of steel plate drum motor shell is the manufacturing, winding, welding and forming of the shell. The forming process can make up for the defects of the casing winding and welding process, which greatly affects the assembly quality of the motor. It has the advantages of good expansion molding effect and wide application range.

The invention solves the problems of poor roundness, unstable size, low inspection pass rate and low yield of the existing shell. The steel plate drum motor shell bulging tooling includes an expansion core, an expansion sleeve sleeved on the outer side of the expansion core, and a driving unit arranged on the upper part of the expansion core for driving the expansion core to move up and down. The outer wall of the expansion core and the inner wall of the expansion sleeve are conically matched. The reshaping tool further comprises a base and a reshaping sleeve sleeved outside the expansion sleeve for reshaping the outer wall of the steel sleeve. The steel sleeve is arranged between the expansion sleeve and the reshaping sleeve. The base is provided with a positioning structure for radially positioning the reshaping sleeve.

The expansion forming tool of steel plate drum motor shell has the advantages of good expansion and shaping effect and wide application range.