Permanent magnet servo motor stator core stamping splicing moulding method and special-purpose tool apparatus

Abstract

The invention discloses a permanent magnet servo motor stator core stamping splicing moulding method. The method comprises the following steps that (1) stator punching sheets are formed by stamping of a punch die; (2) a plurality of stator punching sheets form a stator lamination; (3) six stator lamination groups form a round structure stator; (4) a welding moulding special-purpose tool apparatus including an expanding core, a positioning column assembly and an automatic elevating welding gun is arranged; the round structure stator is placed in the welding moulding special-purpose tool apparatus; the positioning column assembly is inserted into the positioning round holes of the stator punching sheets; and the expanding core is inserted into the center of the round structure stator; (5) and the automatic elevating welding gun makes each stator lamination connecting seam welded and moulded. The invention further discloses the welding moulding special-purpose tool apparatus. A stator core made by means of the brand new stamping splicing moulding method is formed by splicing six sheets. Self-buckled moulding heights of products are achieved through stamping. Connecting parts are welded through tool clamps. A round motor iron core is formed. Materials are saved by 65%.

Description

technical field [0001] The invention relates to the technical field of stator core preparation, in particular to a stamping and splicing forming method for a stator core of a permanent magnet servo motor, and a special welding and forming tooling device for implementing the method. Background technique [0002] The motor generally includes a casing with an inner cavity, and a stator and a rotor arranged in the inner cavity of the casing. The stator core of a conventional motor is made of stacked full-circle punches with tooth grooves, and then the winding work is performed. . Using such a structure not only has the problems of low utilization rate of punching material and high material cost due to too much leftover material during stamping, but also the winding work of this structure is difficult, the winding speed is low, and the wire is easy to break. The production efficiency is low, and at the same time, the slot utilization rate of this structure is low, and the phenom...

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Problems solved by technology

Using such a structure not only has the problems of low utilization rate of punching material and high material cost due to too much leftover material during stamping, but also the winding work of this structure is difficult, the winding speed is low, and the wire is easy to break. The production efficiency is low, and at the same time, the slot utilization rate of this structure is low, and the phenomenon of excessive expansion of the coil end is prone to occur after winding, which seriously affects the improvement of the process performance of the motor

[0003] The traditional stator core manufacturing method has the following two disadvantages: 1. The traditional motor stator core is stamped and formed with square materials, especially for large motor cores, the material loss rate reaches 65%, and the actual utilization rate is only 35%, which is extremely wasteful. Serious; 2. The stamping area of ​​a single piece is large. Due to the large product, the embryo can only be opened first, and then the groove is punched. There are many processes, low manufacturing efficiency, and a corresponding increase in labor costs. The cost of mold manufacturing is high, and the tonnage of the machine tool is required to be large.

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