变电极力作用下的电阻点焊质量分析  

Quality of resistance spot welding based on variable electrode force

作　　者：孙海涛[1] 张延松[1] 来新民[1] 陈关龙[1] 

机构地区：[1]上海交通大学机械与动力工程学院,上海200240

出　　处：《焊接学报》2008年第6期45-48,115,共5页Transactions of The China Welding Institution

基　　金：国家自然科学基金资助项目(50575140);高校博士点基金资助项目(20050248028)

摘　　要：热镀锌低碳钢板在车身内外板上获得了广泛应用。在传统的气动焊枪作用下,采用恒定的电极力焊接时,点焊质量不稳定。然而变电极力对镀锌钢板电阻点焊质量的影响很大。因此利用伺服焊枪能够精确控制电极力的特点,运用正交试验设计方法,深入分析了点焊过程中三个阶段电极力,即预压力、焊接力和锻压力对点焊质量的影响,得到了最优的变电极力参数。结果表明,点焊过程中的锻压力是影响点焊质量的重要因素,其次是焊接力,而预压力是最次要因素;最优的变电极力参数能够明显提高热镀锌低碳钢板的焊点拉剪力和熔核直径,这为基于电极力检测的点焊质量实时评价和电极力控制方面的研究奠定了基础。Hot dipped galvanized(HDG) low carbon steels have been widely used in internal and outside plates of auto body.Constant electrode force was utilized under conventional pneumatic guns,which led to unstable welding quality.However,the quality of resistance spot welding(RSW) on galvanized steels was sensitive to variable electrode force.Considering controlling electrode force exactly with servo guns,a design of experiment(DOE) method was applied to analyze the influence of three stages of electrode force durin...

关 键 词：电极力 试验设计 热镀锌低碳钢板 电阻点焊 

分 类 号：TG443[金属学及工艺—焊接]