摘要
研究了电阻点焊过程中不同条件下的电极位移和电极压力的数据特征.试验设备为170 W逆变直流点焊机.采用多通道高速数据采集系统采集电极位移和压力数据,用MATLAB进行数据分析,比较了5182铝合金和低碳钢的点焊行为特征.结果表明,当熔核长大到一定程度后,铝合金熔核膨胀速率不会像低碳钢那样达到零值,且电极力会出现一个峰值,该峰值预示着熔核已经达到了足够的尺寸.
The behaviors of electrode displacement and electrode force during resistance spot welding under various conditions,such as different weld currents and different electrode forces,were investigated in this paper.The welding experiments were conducted with a 170 W MFDC spot welder.Data were collected via a multi-channel high speed data acquisition system,and were analyzed with MATLAB.The behaviors of 5182 aluminum alloy and mild steel in resistance spot welding were compared.The results showed that nugget expansion rate did not reach zero for aluminum alloy but it did for mild steel when the nugget grew to a certain size.An electrode force peak was detected,which indicated that the nugget size was already sufficient.
出处
《焊接学报》
EI
CAS
CSCD
北大核心
2013年第3期102-104,118,共3页
Transactions of The China Welding Institution
关键词
电阻焊
电极位移
电极力
熔核尺寸
数据采集
resistance spot welding
electrode displacement
electrode force
nugget size
data acquisition
