Resistance Spot Welding of Ultra-Thin Automotive Steel
Resistance Spot Welding of Ultra-Thin Automotive Steel
复制标题
超薄汽车钢电阻点焊
DOI：
10.1115/1.4023367
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发表时间：
2013-04-01
影响因子：
4
通讯作者：
Wang, Pei-Chung
中科院分区：
文献类型：
--
作者：
Zhao, YangYang;Zhang, YanSong;Wang, Pei-Chung
超薄规格钢点焊的主要挑战之一（例如，例如，在一个实施例中，0.75 mm）。为了降低电极尖端温度，提高焊接质量，采用在0.4mm厚的SAE1004镀锌钢板电阻点焊时，在电极与工件之间插入柔性带的方法。分析了插入条对焦耳热产生和温度分布的影响。然后，由于在测量实验电极尖端温度的困难，有限元模型已被用来估计焊接区域内的温度分布。过程变量的影响（即，带材材料和厚度）对帽盖温度和焊接质量的影响进行建模。最后通过实验验证了模型的正确性。试验数据和模拟结果表明，存在的带显着促进焊缝的启动和增长，并降低电极的退化率。在所研究的材料中，用于电阻点焊0.4mm厚的镀锌SAE 1004钢的理想带材被确定为0.12mm厚的Cu55Ni45合金。
One of the major challenges in spot welding of ultra-thin gage steel (e. g., 0.75 mm). In this study, the method of inserting flexible strips between the electrode and workpiece in resistance spot welding of 0.4 mm thick galvanized SAE1004 steel sheet has been adopted in order to reduce electrode tip temperature and improve weld quality. The effect of the inserted strips on the Joule heat generation and temperature distribution has been analyzed analytically. Then, because of the difficulties in measuring the experimental electrode tip temperature, a finite element model has been employed to estimate temperature distributions within the weld zone. The effects of the process variables (i.e., strip material and thickness) on the cap temperature and weld quality were modeled. Experiments were also conducted to validate the modeling results. Test data and modeling results showed that the presence of the strip significantly facilitated weld initiation and growth and decreased the rate of electrode degradation. Of the materials investigated, the desirable strip for resistance spot welding 0.4 mm thick galvanized SAE1004 steel was determined to be 0.12 mm thick Cu55Ni45 alloy.