Manufacturing method for large-specification high-precision iron core

Abstract

The invention relates to a manufacturing method for a large-specification high-precision iron core. According to the manufacturing method, a stamped and formed iron core sheet is subjected to high-temperature heat treatment firstly; then the surface of the iron core sheet is coated with glue; next, the iron core sheet is laminated into a stator iron core or a rotor iron core; the manufacturing method comprises the main steps of annealing heat treatment before lamination, an iron core gluing process, a process of die mounting and fixing, a baking process, and a laminating process; the laminating process is applicable to iron core sheets with or without heat treatment requirement, particularly an iron-nickel alloy type iron core sheet which normally requires heat treatment at a temperature of greater than 1,000 DEG C; and by adoption of the gluing and laminating ways in the manufacturing method, the lamination of the large-specification stator iron core or rotor iron core is realized, and the geometrical tolerance of the iron core can be well ensured.

Description

technical field [0001] The invention relates to the field of motors, in particular to a method for manufacturing a large-scale high-precision iron core. Background technique [0002] At present, the stacking process of ordinary motor stator and rotor adopts riveting, welding, fastening bolt connection or self-fastening to assemble a certain number of iron chips into an iron core; the above fixing methods are local point fixing methods. The strength is poor, it is difficult to make an iron core with high tensile strength, and the local point fixation will cause short circuit at the edge of the iron chip, and the insulation will decrease. Therefore, the method of laminating after coating the surface of the iron chip with glue has become a unique method of lamination and fixing; The tensile strength far exceeds the end face tensile strength of the iron core obtained by the local fixing method, and the insulation between the iron chips is good, which can reduce the eddy current...

AI Technical Summary

Problems solved by technology

[0002] At present, the stacking process of ordinary motor stator and rotor adopts riveting, welding, fastening bolt connection or self-fastening to assemble a certain number of iron chips into an iron core; the above fixing methods are local point fixing methods. The force is poor, it is difficult to make an iron core with high tensile strength, and local point fixation will cause a short circuit at the edge of the iron chip and a decrease in insulation

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