薄板焊接的极限——CMT冷金属过渡焊接技术

Limitation of sheet metal welding——CMT cool metal transition technique

在焊接不同壁厚的零部件时,要求具有良好焊缝厚度的厚工件要过渡到薄工件,并且在焊缝厚度过渡区仅有少量的热传导。许多材料无法承受焊接过程中持续不断的热量输入,为了避免熔滴穿透,实现无飞溅熔滴过渡和良好的冶金连接,就必须降低热输入量,在这种要求下,传统的气体保护焊接已经无能为力,而CMT技术实现了这种可能。相对于传统的MIG/MAG焊接过程而言,CMT技术的电弧温度和熔滴温度比较"冷"。其特点是冷热循环交替,从而实现焊接机器人在MIG/MAG焊接中的无飞溅焊接以及钎焊0.3 mm超薄板。CMT技术的焊接系统适用于任何薄板、超薄板以及MIG钎焊镀锌板、碳钢与铝板的连接。

Welding of different thickness of the parts,the required thickness of the thick seam with good jobs to the transition to the thin piece,and the thickness of the transition zone in the weld with only a small amount of heat conduction.Some material couldn＇t help to endure the heating input continually,for avoiding welding penetrate and realize no spatter welding and to get well metal connection,it is necessary to reduce heating input value,CMT technique can satisfied it.Contrast with the traditional MIG/MAG welding technique,the arc temperature and melt spot temperature is lower.Circulate and alternate between cool and hot,consequently robot can realize no spatter welding and brazing sheet only 0.3 mm thickness using MIG/MAG welding technique.CMT technique adapt to welding sheet metal,brazing sheet with zinc coating,welding between carbon steel and aluminum sheet.