Motor stator piece punching blanking stamping technology and key die thereof

Abstract

The invention provides a motor stator piece punching blanking stamping technology and a key die thereof. The stamping technology comprises the following steps: 1) punching a stator excircle and a rotor shaft hole again; 2) singly punching a stator slot; 3) singly punching a rotor slot, and simultaneously separating the rotor piece. The key die is composed of a top die part, a lower die part and aguiding part, wherein the top die part comprises an upper cutting edge provided with a stator excircle die, a cramp slot punch, an external marking slot punch, a rotor shaft hole terrace die and the upper cutting edge of a keyway punch; the upper cutting edge is fixedly arranged on an upper fixed plate, and the setting position and the size of the upper cutting edge correspond to the position andthe size of the stator excircle required to be stamped, the cramp slot, the external marking slot, the rotor shaft hole and the keyway; and the lower die part comprises a low cutting edge corresponding to the upper cutting edge. When the invention stamps, one working procedure is omitted so as to reduce blank transportation one time, lower labor intensity and improve stamping efficiency; during mass production, effect is especially obvious. The phenomenon that the stator piece slot has irregular shape and the rotor piece has waviness rate can be avoided, and stamping effect is excellent.

Description

technical field [0001] The invention relates to the field of motor manufacturing, in particular to a stamping process for punching and blanking motor stator and rotor slices 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. A method with relatively high efficiency is to use four-sequence four-pair molds and corresponding auxiliary special tools to complete the stamping of stator and rotor segments. The stamping steps are: [0003] ①Blanking of stator and rotor blanks: stamping the rotor shaft hole and the outer circle of the stator; [0004] ② Repunching the stator buckle groove, marking groove and rotor shaft hole keyway; [0005] ③Single punch stator slot and separation to obtain stator slices; [0006] ④ Rotor slices are obtained by single punching the rotor slots. [0007] In steps ① and ②,...

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 ④ 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

Images