Cause Analysis and Solution Measure of Bars Pulling from Brazing Joints of Squirrel Cage Motor Rotor Brazing Simulation Sample

XIE Guisheng; XIE Shiyan; GE Yaqiong; WANG Zhigang; WU Yuan; LIU Haining

doi:10.7512/j.issn.1001-2303.2024.02.15

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Cause Analysis and Solution Measure of Bars Pulling from Brazing Joints of Squirrel Cage Motor Rotor Brazing Simulation Sample
Vol. 54, Issue 2, Pages: 98-103(2024)
DOI： 10.7512/j.issn.1001-2303.2024.02.15

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谢贵生，谢诗妍，葛亚琼，等.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.

XIE Guisheng, XIE Shiyan, GE Yaqiong, et al.Cause Analysis and Solution Measure of Bars Pulling from Brazing Joints of Squirrel Cage Motor Rotor Brazing Simulation Sample[J].Electric Welding Machine, 2024, 54(2): 98-103.
谢贵生，谢诗妍，葛亚琼，等.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. DOI： 10.7512/j.issn.1001-2303.2024.02.15.

XIE Guisheng, XIE Shiyan, GE Yaqiong, et al.Cause Analysis and Solution Measure of Bars Pulling from Brazing Joints of Squirrel Cage Motor Rotor Brazing Simulation Sample[J].Electric Welding Machine, 2024, 54(2): 98-103. DOI： 10.7512/j.issn.1001-2303.2024.02.15.

摘要

某型机车牵引电机鼠笼式转子端环与导条模卡钎焊外观检查合格后进行拉伸试验，部分端环-导条钎焊接头的导条从焊缝位置拉脱，不能满足抗拉强度要求。为解决该问题，通过渗透探伤和宏观检测发现端环内侧与导条的钎缝界面存在微裂纹、钎料填充不致密和分层等缺欠。端环-导条结构设计不合理以及钎焊高温持续时间不足是导致拉脱问题的主要因素。针对这两个因素提出了改进方案：端环槽深由6 mm改为4 mm、增加端环槽内侧45°倒角，冬季钎焊时450 ℃保温时间延长为90 s。改进后经拉伸试验验证，成功解决了导条拉脱的问题，保障了产品质量。

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 insufficient duration of high temperature brazing are the main factors leading to the pull-out problem. In view of these two factors

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. After 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

Keywords

squirrel cage rotorbrazingbar tensile failurecause analysisstructure improvement

references

肖时峰，曾美扬，邓苹，等. 交流电机转子铜端环与导条整体感应钎焊加热器研制［J］. 电焊机， 2018， 48（1）：41-42.

XIAO S F，ZENG M Y，DENG P，et al. Development of the whole induction brazing heater of AC motor rotor copper end ring and guide strip［J］. Electric Welding Machine， 2018，48（1）：41-42.

赵东超，谢贵生. 牵引电机鼠笼式转子断条失效分析［J］. 电焊机，2020， 50（1）：109-113.

ZHAO D C， XIE G S. Failure analysis of bars breaking of squirrel-cage rotor of traction motor［J］. Electric Welding Machine， 2020，50（1）：109-113.

胡学知.渗透检测［M］. 北京：机械工业出版社，2021：25-30.

张启运，庄鸿寿. 钎焊手册（第2版）［M］. 北京：机械工业出版社，2008：615-637.

薛松柏，顾文华. 钎焊技术问答（第1版）［M］. 北京：机械工业出版社，2007：27-32.

张学军. 航空钎焊技术（第1版）［M］. 北京：航空工业出版社， 2008：24.

董鹏.导磁体替代硅钢片在感应加热中的应用［J］. 热处理，2010， 25（03）：48-52.

DENG P. Substitution of Magnetizer for Silicon Steel Sheet in Induction Heating［J］. Heat Treatment， 2010， 25（03）：48-52.

American Welding Society. Brazing Handbook（Fifth Edition）［M］.America， 2007：26.

谢贵生，武媛，刘溢泉. 电机转子钎料无镉化替代研究［J］. 电焊机，2023， 53（12）：46-50.

XIE G S， WU Y， LIU Y Q. Research on Cadmium-free Substitution of the Brazing Filler Meterial for Motor Rotor［J］. Electric Welding Machine，2023，53（12）： 46-50.

龙伟民，孙华为，秦建，等. 钎焊技术在高速列车制造中的应用［J］. 电焊机，2018， 48（3）：25-31.

LONG W M， SUN H W， QIN J， et al. Application of brazing technology in high-speed train manufacturing［J］. Electric Welding Machine， 2018，48（3）：25-31.

谢贵生，李磊，武媛. 电机转子钎焊钎料不爬坡分析研究［J］. 热加工工艺，2022，51（17）：140-143.

XIE G S，LI L，WU Y. Analysis on Non-climbing Slope of Brazing Filler Material during Brazing of Motor Rotor［J］. Hot Working Technology，2022，51（17）：140-143.

谢贵生，武媛，齐影，等. 电机转子钎焊用高温钎料和钎剂的国产化应用研究［J］. 热加工工艺，2023，2（9）：148-150.

XIE G S，WU Y，QI Y，et al. Research on Domestic Application of High Temperature Brazing Filter Material and Flux for Motor Rotor Brazing［J］. Hot Working Technology，2023，2（9）：148-150.

陈修凯，路英瑶，卞红，等. 钎焊温度对TAl/Ti-Zr-Cu-Ni-Ag/TAl接头界面组织性能的影响［J］. 电焊机，2023.53（8）：78-85.

CHEN X K，LU Y Y，BIAN H，et al. Effect of Brazing Temperature on Interfacial Microstructure and Mechanical Property of TA1/Ti-Zr-Cu-Ni-Ag/TA1 Joint［J］. lectric Welding Machine， 2023， 53（8）： 78-85.

李红，叶雷. 先进钎焊技术与应用［M］. 北京：机械工业出版社，2019：7-9.

赵越. 钎焊技术及应用［M］. 北京：化学工业出版社，2021：6.

王娟，李亚江.钎焊与扩散焊［M］. 北京：化学工业出版社，2016：109-110.

ASME锅炉及压力容器焊接、钎接和粘接委员会.ASME锅炉及压力容器规范 Ⅸ 焊接、钎接和粘接评定（2019版）［M］. 北京：中国石化出版社，2019：194.

桂立丰，曹用涛.机械工程材料测试手册（力学卷）［M］.沈阳：辽宁科学技术出版社，2001：99-127.

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