摘要
针对铝合金点焊工艺的特点及其应用难点,为减少铝合金点焊制造成本,采用压紧蜂窝模具使电极表面形成特定形状,采用该电极进行铝合金点焊,实现了每次修磨后焊接点数提升。研究结果表明,针对2 mm+2 mm的6系铝合金板材,通过采用前端带有圆弧尺寸R100 mm的电极帽,在采用适当的工艺参数(焊接电流42.5 kA,焊接压力6.8 kN,焊接时间100 ms,压紧压力7 kN),当压紧模具凹坑深度为0.5 mm,模具间宽度0.4 mm,凸起处宽度尺寸0.2 mm时,修磨后可以获得至少128点的点焊焊接能力,且随着焊接点数的增加,焊点强度呈上升趋势,可以为制造行业铝合金点焊技术的发展提供参考。
This paper introduces the characteristics and application difficulties of aluminum alloy spot welding process.In order to reduce the manufacturing cost of aluminum alloy spot welding,this paper designs a new method to improve the welding points after each grinding by using the compressed honeycomb mold to make the electrode surface form a specific shape,and using the compressed electrode to carry out aluminum alloy spot welding.The research results show that for the 2 mm+2 mm 6 series aluminum alloy plates,by using the electrode cap with an arc size of R100 mm on the front section,with appropriate process parameters(welding current 42.5 kA,welding pressure 6.8 kN,welding time 100 ms,and pressing pressure 7 kN),when the depth of the pressing die pit is 0.5 mm,the width between the dies is 0.4 mm,and the width of the bulge is 0.2 mm,at least 128 spot welding points can be obtained after grinding,And with the increase of the number of welding points,the strength of welding points shows an upward trend.This research provides a reference and optimization direction for the development of aluminum alloy spot welding technology in the manufacturing industry.
作者
钟丽慧
韩立军
梁琼
ZHONG Lihui;HAN Lijun;LIANG Qiong(FAW-Volkswagen Automotive Co.,Ltd.,Changchun 130011,China)
出处
《电焊机》
2023年第12期113-118,共6页
Electric Welding Machine
关键词
铝合金
电阻点焊
电极侵蚀
蜂窝模具
焊核
aluminum alloy
resistance spot welding
electrode erosion
honeycomb mould
weld nugget
