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紫铜及含锌量低的黄铜,电阻点焊的可焊性差。紫铜由于导热系数大,薄紫铜板点焊时常用钨、钼等高电阻的材料制作电极,一般将钨或钼块镶嵌在镉铜等铜合金电极上。电极形状加工成球面形或圆锥形。点焊板厚小于2mm的黄铜板时,球面电极的工作表面半径为75mm;板厚大于2mm时,则为150mm。对于厚度不同的黄铜板点焊接头,在厚板一侧建议用平端面的圆锥形电极,平端面直径5～8mm。
Copper and zinc with a low amount of brass, resistance spot welding poor solderability. Copper as a large thermal conductivity, thin copper plate spot welding tungsten, molybdenum and other high-resistance materials commonly used electrodes, usually tungsten or molybdenum mosaic in cadmium copper and other copper alloy electrodes. Electrode shape processed into spherical or conical. Spot welding plate thickness less than 2mm brass plate, the spherical surface of the working electrode radius of 75mm; plate thickness greater than 2mm, then 150mm. For the different thickness of the brass plate spot welded joints, the flat side of the cone-shaped electrode is recommended on the side of the flat, flat end surface diameter of 5 ~ 8mm.