Manufacturing method for large-specification high-precision iron core

A manufacturing method and high-precision technology, which can be used in the manufacture of motor generators, stator/rotor bodies, electrical components, etc., and can solve the problems of difficulty in making iron cores with tensile strength, poor connection force, and short circuits at the edges of iron cores.

Active Publication Date: 2016-12-07
杭州科德磁业有限公司
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  • Abstract
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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 metho

Method used

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  • Manufacturing method for large-specification high-precision iron core

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Embodiment

[0020] Embodiment: During the production process, a three-axis automatic paint spraying machine (Xjc-I5.0) is used to spray glue on the iron chips.

[0021] The core manufacturing steps are:

[0022] a. Place stamped and formed iron chips in a high vacuum positive pressure sintering furnace (RVSI-50G) for vacuum annealing. The vacuum degree in the furnace is not lower than 1.2×10 -2 Pa, the vacuum degree is preferably 1.3×10 -2 Pa.

[0023] b. Raise the furnace temperature to 1130±20°C by heating for 3 hours, keep the temperature at this temperature for 2~6 hours and then lower the furnace temperature to 450±20°C at a cooling rate of 100~150°C / h. The holding time is preferably 6 hours; then lower the furnace temperature to below 100°C at a cooling rate of not less than 200°C / h, then take the iron chips out of the furnace, and let the iron chips cool naturally at room temperature.

[0024] c. Arrange the annealed iron chips in an orderly manner on the steel wire mesh, spray ...

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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...

Claims

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Application Information

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IPC IPC(8): H02K15/02H02K15/12
Inventor 刘伟杨全福丁杰
Owner 杭州科德磁业有限公司
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