电焊机2024，Vol.54Issue(2)：98-103,6.DOI:10.7512/j.issn.1001-2303.2024.02.15
鼠笼式电机转子钎焊模卡导条拉脱原因分析及解决措施
Cause Analysis and Solution Measure of Bars Pulling from Brazing Joints of Squirrel Cage Motor Rotor Brazing Simulation Sample
谢贵生 1谢诗妍 2葛亚琼 2王志刚 1武媛 1刘海宁1
作者信息
- 1. 中车永济电机有限公司,山西 永济 044502
- 2. 太原科技大学 材料科学与工程学院,山西 太原 030024
- 折叠
摘要
Abstract
Tensile test are conducted after the brazing VT for end ring and bar joints of squirrel cage rotor of a certain type of traction motor.It is found that part of the bar is pulled off from the end ring and bar joint beam,this result cannot satisfy the tensile strength requirement.In order to solve this problem,micro-cracks,undense filler metal filling and delamination were found in the brazing interface between the inner side of the end ring and the conductor bar through penetration testing and macroscopic testing.It is pointed out that the unreasonable design of end-ring and conductor bar structure and the insuf-ficient duration of high temperature brazing are the main factors leading to the pull-out problem.In view of these two fac-tors,the improvement scheme is put forward:the depth of the end ring groove is changed from 6 mm to 4 mm,the inner chamfer of the end ring groove is increased by 45°,and the holding time of 450℃is extended to 90 s in winter brazing.Af-ter the improvement,the tensile test proved that the problem of pulling out of the conductor bar was solved successfully and the product quality was guaranteed..关键词
鼠笼式转子/钎焊/导条拉伸失效/原因分析/结构改进Key words
squirrel cage rotor/brazing/bar tensile failure/cause analysis/structure improvement分类
矿业与冶金引用本文复制引用
谢贵生,谢诗妍,葛亚琼,王志刚,武媛,刘海宁..鼠笼式电机转子钎焊模卡导条拉脱原因分析及解决措施[J].电焊机,2024,54(2):98-103,6.
