A kind of manufacturing method of silicon steel sheet for motor

Abstract

The invention relates to a silicon steel sheet for a motor. The silicon steel sheet comprises clamping grooves and a rivet hole array; the clamping grooves are identical in size and are distributed according to a certain number; the rivet hole array is located above the clamping grooves; rivet holes in the rivet hole array are distributed at intervals in a manner that the rivet holes are separated from each other by at least one clamping groove. The silicon steel sheet is characterized in that the silicon steel sheet is a ring body superposed structure; a single continuously cold-rolled strip is stamped and coiled to form the N-layer-height ring body superposed structure; a step pitch between the edge sheet center of one clamping groove and the edge sheet center of an adjacent clamping groove is L; a distance between the rivet holes at layer-to-layer transition portions is I; and I and the inclination alpha of inclined wire winding grooves relative to a horizontal plane satisfy the relational expression that I=L / alpha / N, wherein the inclined wire winding grooves are formed through the superposition of N layers of clamping grooves. According to the silicon steel sheet for the motor of the invention, with the single continuously cold-rolled strip adopted, a rotor with the inclined winding grooves can be obtained. According to a backward technique, a large number of cold-rolled sheets are stamped into silicon steel sheet rings, and the silicon steel sheet rings are superposed to form a rotor. Compared with the backward technique, the technique adopted in the invention can assist in saving costs such as a large quantity of materials, manpower, financial resource and production time, reducing energy consumption of an entire production process, and has creativity. The present invention also discloses a manufacturing method.

Description

technical field [0001] The invention relates to a method for manufacturing a silicon steel sheet for a motor. Background technique [0002] The interior of the motor is composed of a stator and a rotor. The fixed part of the motor is called the stator, and a pair of DC excitation static main poles are installed on it; the rotating part is called the armature core, and the armature winding is installed on it. Generate induced electromotive force to act as a rotating magnetic field, and then generate electromagnetic torque for energy conversion. [0003] The stator and rotor are usually made of silicon steel sheets. The electromotive force generated by the motor after electrification has a positive correlation with the number of armature windings installed on the rotor. The more armature windings, the greater the electromotive force generated by the rotor. The faster the rotor turns. Therefore, in a motor of the same size, the number of armature windings of the rotor determi...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to solve the technical problem that the silicon steel sheets of the existing inclined winding slots are stamped into a plurality of coils and then stacked to form a rotor with an extremely high cost, and provide a Based on the existing technology of making rotors with continuous non-inclined winding slots from a single cold-rolled plate, a single silicon steel sheet can be used for the production of silicon steel sheets for motors with inclined winding slots.

Images