不等厚6016-T4P三层板电阻点焊工艺窗口调控技术  

Resistance spot welding process window control technology of 6016-T4P three-layer plate with unequal thickness

作　　者：刘庆永 毛晓东 宋小雨 徐志强 李英东 王国军 Liu Qingyong;Mao Xiaodong;Song Xiaoyu;Xu Zhiqiang;Li Yingdong;Wang Guojun(Chalco Materials Applied Research Institute Co.,LTD.,Beijing 100029,China)

机构地区：[1]中铝材料应用研究院有限公司,北京100029

出　　处：《焊接》2024年第5期63-68,共6页Welding & Joining

摘　　要：通过电阻点焊工艺性试验,分析2.5 mm,3.2 mm,2.0 mm 3种厚度6016-T4P板材搭接焊点熔核形成过程,并采用主机厂常用的2种不同形状电极帽(ϕ16R20,ϕ20R100)分别进行工艺性测试,建立对应电阻点焊焊接工艺窗口,同时分析了电极压力和电极帽形状对于焊接工艺窗口偏移的影响。结果表明,采用ϕ16R20电极帽时,电极压力的变化(3.5~5.5 kN)可使焊点可用最小焊接电流变化3 kA的幅度,采用ϕ20R100电极帽时,电极压力的变化(3.5~5.5 kN)可使焊点可用最小焊接电流变化1 kA的幅度,在相同焊接工艺参数(电极压力4.5 kN、焊接时间200 ms、保持时间150 ms)条件下,电极帽形状(ϕ16R20,ϕ20R100)的变化可使焊点可用最小焊接电流变化5 kA的幅度。通过该文的研究成果,可显著改善铝合金生产厂在材料推广应用中遇到的电阻点焊工艺窗口不吻合的情况,方便材料切换,利于铝合金在主机厂的推广应用。Through resistance spot welding technology test,formation process of 6016-T4P plate lap welding spot nugget with three thicknesses of 2.5 mm,3.2 mm and 2.0 mm was analyzed.And two different shape electrode caps(ϕ16R20,ϕ20R100)commonly used in main engine factory were used for technology test respectively,and the corresponding resistance spot welding process window was established.Meanwhile,influence of electrode pressure and electrode cap shape on the shift of welding process window was analyzed.The results showed that whenϕ16R20 electrode cap was used,change of electrode pressure(3.5~5.5 kN)could make the minimum welding current available to welding spot change by 1 kA.Whenϕ20R100 electrode cap was used,change of electrode pressure(3.5~5.5 kN)could make the minimum welding current change of 3 kA.Under the same welding parameters(electrode pressure 4.5 kN,welding time 200 ms,holding time 150 ms),change of electrode cap shape(ϕ16R20 electrode cap,ϕ20R100 electrode cap)could make the minimum welding current available to welding spot change by 5 kA.The research results of this paper could significantly improve the situation that resistance spot welding process window did not match in the promotion and application of aluminum alloy in the aluminum alloy production plant,facilitate the material switching,and be conducive to the promotion and application of aluminum alloy in the main engine plant.

关 键 词：6016-T4P 电阻点焊 电极帽 工艺窗口 调控 

分 类 号：TG453[金属学及工艺—焊接]