Sheath crimping device of non-salient pole type permanent magnet rotor

A sheath crimping device of a non-salient pole type permanent magnet rotor is used for crimping a sheath on a permanent magnet of the non-salient pole type permanent magnet rotor. The device comprises a positioning disc (10) for placing a rotor iron core (2), the end face of the positioning disc is vertically connected with a pipe body (7), and the inner diameter of the pipe body is larger than the outer diameter of the non-salient pole type permanent magnet rotor; a plurality of sliding blocks (4) with rectangular sections are symmetrically inserted into the wall of the pipe body, the number of the sliding blocks is equal to that of the permanent magnets (20), the inner sides of the sliding blocks are connected with pressing heads (3) capable of pressing out a concave part of a sheath (22), the outer sides of the sliding blocks are connected with pin columns (5), the pin columns are inserted into a cam groove (21) of a rotating disc (8), and the inner circle of the rotating disc is sleeved on the pipe body (