Automobile Technology & Material

采用电阻点焊工艺焊接­凸焊螺栓应用研究

- 王浩名 范林

………………………王浩名 范林Research on Applicatio­n of Resistance Spot Welding Technology in Projection Weldingbol­t ……………………………… Wang Haoming, Fan Lin

511434) (广州汽车集团股份有限­公司汽车工程研究院,广州

1.8 mm GX420LAD+ZF

摘要:为了解决纵梁等大件凸­焊螺栓搬运困难,物流运输成本高等问题,以厚度为 的

M6镀锌钢板和 螺栓为对象,研究了电阻点焊工艺焊­接凸焊螺栓的可行性。根据经验逐步调试焊接­参数,确定最佳

4.15 kn、焊接参数并获得了优质­焊接接头并满足剥离力、扭矩、外观质量标准要求。试验结果表明:当采用压力为

1 8.8 ka、焊接时间1 400 ms、焊接电流2 12 ka、焊接时间2 520 ms M6焊接电流 为 为 为 为 的参数组合时,可获得 螺栓的最佳力学性能和­外观质量。本研究可以为螺栓新型­焊接工艺方法提供有效­的理论依据。

关键词:电阻点焊 焊接参数 工艺方法中图分类号:TG453.9 文献标识码:B 10.19710/J.cnki.1003-8817.20210002 DOI:

Research on Applicatio­n of Resistance Spot Welding Technology in Projection Welding Bolt Wang Haoming, Fan Lin

(Automotive Engineerin­g Research Institute of Guangzhou Automobile Group Co., Ltd., Guangzhou 511434)

Abstract:in order to solve the problem of difficult handling and high logistics transporta­tion cost of large projection welding bolts such as longitudin­al beam, this paper studies the feasibilit­y of welding projection welding bolts by resistance spot welding process with 1.8 mm GX420LAD + ZF galvanized steel plate and M6 bolt as the object. According to the experience, the welding parameters are adjusted step by step, the best welding parameters are determined and the high quality welding joints are obtained and the peeling force, torque and appearance quality standards are met. Test results show that the best mechanical properties and appearance quality of M6 bolts can be obtained when the parameters of pressure 4.15 kn, welding current one 8.8 ka, welding duration one 400 ms, welding current two 12 ka, welding duration two 520 ms are applied. This study can provide an effective theoretica­l basis for the new bolt welding process. Key words: Resistance spot welding, Welding parameters, Process method

1 前言

1凸焊螺栓作为白车身­上常用的 种标准件,其凸焊工艺常常需要将­冲压件运输到凸焊机工­位进行螺栓凸焊,最后再运输至焊接工位­进行下一序焊接。而点焊螺栓只需在点焊­夹具上装配凸焊螺栓,通过点焊工艺将凸焊螺­栓与钣金连接。在汽车制造工业中大量­使用电阻点焊,只有对不同材

料、不同料厚选择不同的焊­接工艺参数,才能实现

1.8 mm优质焊接接头 [1]。选用厚度 ,材料

GX420LAD+ZF M6镀锌钢板为对象,验证了 凸焊螺栓通过电阻点焊­连接的可行性。

2 螺栓电阻点焊的优越性

a.物流成本低。相比凸焊工艺,电阻点焊无需将零件物­流运输到凸焊工位。

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