Method for guaranteeing stack mounting precision of straight-slot iron cores of motor and stack mounting die employed in method

Abstract

The invention discloses a method for guaranteeing the stack mounting precision of straight-slot iron cores of a motor and a stack mounting die employed in the method. According to the method, at least three key boards are adopted for performing positioning during stack mounting of the iron cores, so that the concentricity of the iron cores are improved; limiting blocks are clamped on the key boards between an upper pressure plate and a lower pressure plate, bending deformation of the key boards is limited through clamping grooves of the limiting blocks, and the verticality between the key boards and positioning surfaces of the upper pressure plate and the lower pressure plate is guaranteed through the processing precision of two end surfaces of each of the clamping grooves and the limiting blocks. The method is high in stack mounting efficiency; stacked layers of iron core stamping sheets are regular in a stack mounting process and unlikely to deform, so that the motor quality can be remarkably improved.

Description

technical field [0001] The invention relates to a method for ensuring the stacking accuracy of motor straight-slot iron cores and a stacking mold used, and belongs to the technical field of torque motor straight-slot iron core stacking. Background technique [0002] In recent years, the production technology of torque motors at home and abroad has developed rapidly, the performance index requirements of torque motors are getting higher and higher, and the processing technology requirements for torque motors are also becoming more and more stringent. Among them, the stacking quality of the torque motor rotor core directly affects the torque motor's operation (especially low-speed operation) stability, output torque, starting voltage, insulation resistance and other important performance parameters. At the same time, the tidiness of core stacking also has an important impact on the process of winding embedding, plastic (potting) sealing, etc. [0003] The current stacking mol...

AI Technical Summary

Problems solved by technology

If it is designed as a stepped structure, only the positioning part is thinned and the rest is thickened. Although the rigidity problem is solved, the processing difficulty is increased, and the surface of the key board that can be ground cannot be ground, and the dimensional accuracy is not easy to guarantee; the roughness It becomes larger, which increases the friction between the key board and the punch, so that the punch is subjected to additional friction when stacked and pressed, resulting in radial deformation

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