Process for blanking and stamping motor stator piece and rotor piece with air hole and key die thereof

Abstract

The invention provides a process for blanking and stamping a motor stator piece and a rotor piece with an air hole and a key die thereof. The process comprises the following technical stamping steps: (1) stamping a stator excircle, a rotor axle hole and an air hole again; (2) singly stamping a stator slot; and (3) singly stamping a rotor slot and separating the stator piece from the rotor piece. The key die comprises a top die part, a bottom die part and a guiding part, wherein the top die part comprises a stator excircle cavity die, a cramp slot punch, an external labeling slot punch, a rotor air hole punch, an axle hole terrace die and the upper cutting edge of a key slot punch; the upper cutting edge is fixed on an upper fixed plate; the position and the size of the upper cutting edge correspond to those of the stator excircle which needs to be stamped, the cramp slot, the external labeling edge, the rotor air hole, the axle hole and the key slot; and the bottom die part comprises a lower cutting edge corresponding to the upper cutting edge. In the process, two stamping steps are omitted, labor intensity is lowered, and stamping efficiency is improved. The phenomenon of the irregular shape of the stator sheet slot is avoided, the rotor sheet wave degree can be prevented, and stamping effect is good.

Description

technical field [0001] The invention relates to the technical field of motor manufacturing, in particular to a blanking and stamping process of motor stator and rotor blades with ventilation holes and a key mold thereof. Background technique [0002] The stator and rotor are the core components of the motor. They are formed by stamping the entire sheet with a mold, and then stacking the stator and rotor pieces separately. The stamping process of the motor stator and rotor is an essential process. The stamping process takes up a lot of man-hours and occupies a considerable proportion of the motor cost. In mass production, the appropriate stamping method directly affects the production efficiency and production cost. [0003] The stamping steps of the existing stamping process for stator and rotor blades with ventilation holes are as follows: [0004] ① Blanking of stator and rotor blanks: use the "one drop two" process to settle the rotor blanks; [0005] ②Punching positi...

AI Technical Summary

Problems solved by technology

When the rotor groove is a closed groove, using the existing technology, stamping out the rotor groove shape in step ⑤ will cause large waves on the rotor blades, which are very obvious on the iron core after lamination and cannot be eliminated, affecting the performance of the motor

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