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1.上海交通大学 机械系统与振动全国重点实验室,上海 200240
2.上海交通大学 上海市复杂薄板结构数字化制造重点实验室,上海 200240
3.中国工程物理研究院 材料研究所,绵阳 621900
4.吉利汽车集团有限公司 制造工程(ME)中心,宁波 315300]
陈家暄,男,2002年生,辽宁大连人,博士研究生;主要研究方向为铝/钢异质材料的电阻点焊;E-mail:chenjiaxuan2024@sjtu.edu.cn。
李永兵,男,1975年生,陕西宝鸡人,博士,教授,博士研究生导师;主要研究方向为高性能点连接工艺与智能装备;E-mail:yongbinglee@sjtu.edu.cn。
收稿日期:2025-05-30,
纸质出版日期:2025-09-15
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陈家暄,胡珊青,李卓然,等. 工况波动对铝钢电阻点焊的影响[J]. 机械强度,2025,47(9):80-89.
CHEN Jiaxuan,HU Shanqing,LI Zhuoran,et al. Influence of working condition fluctuation on resistance spot welding of aluminum alloy and steel[J]. Journal of Mechanical Strength,2025,47(9):80-89.
陈家暄,胡珊青,李卓然,等. 工况波动对铝钢电阻点焊的影响[J]. 机械强度,2025,47(9):80-89. DOI: DOI:10.16579/j.issn.1001.9669.2025.09.007.
CHEN Jiaxuan,HU Shanqing,LI Zhuoran,et al. Influence of working condition fluctuation on resistance spot welding of aluminum alloy and steel[J]. Journal of Mechanical Strength,2025,47(9):80-89. DOI: DOI:10.16579/j.issn.1001.9669.2025.09.007.
在汽车轻量化背景下,使用电阻点焊实现铝钢混合结构的有效连接是不懈的追求,但在实际焊接生产中,工况波动情况频发,严重影响焊点质量。首先,采用电阻点焊工艺连接铝合金与低碳钢板,研究不同倾斜角、板材间隙、冷却水流量等工况波动对铝钢电阻点焊的影响。然后,通过对比熔核直径和厚度、金属间化合物厚度、剥离性能以及断裂模式以评估焊点质量。研究结果表明,倾斜角和板材间隙在一定范围内增加,冷却水流量在一定范围内降低均会降低焊点质量,因此在实际生产中应尽量避免。研究结果为优化铝钢电阻点焊工艺提供了理论依据和实践指导。
Under the background of automotive lightweighting
the use of resistance spot welding to achieve effective connection of aluminum to steel structures is an unremitting pursuit. However
in actual welding production
fluctuation of working conditions occur frequently
seriously affecting the quality of weld points. Firstly
the resistance spot welding process was adopted to connect aluminum alloy and low-carbon steel plates. The influences of different inclination angles
plate gaps
and fluctuations in cooling water flow conditions on the resistance spot welding of aluminum-steel were investigated. Then
the quality of the weld points was evaluated by comparing the diameter and thickness of the nugget
the thickness of the intermetallic compound
the coach peel performance
as well as the fracture mode. The research results show that an increase in the inclination angle and the gap between the plates within a certain range
as well as a decrease in the cooling water flow within a certain range
will both reduce the quality of the weld points. Therefore
they should be avoided as much as possible in actual production. The results of this study provide a theoretical basis and practical guidance for optimizing the resistance spot welding process of aluminum to steel.
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