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在化工设备制造中,常采用铝和铝合金制作各种容器,以前我厂这些设备的焊接均采用钨极手工氩弧焊。当容器壁厚较小时,尚能获得满意的结果,但当容器壁厚大于12毫米时,为了获得良好的焊缝质量,就需要采取焊前预热和多层焊接的措施,使劳动条件恶化,生产率也很低。因此研制了 MDA—500熔化极半自动氩弧焊机,采用这种焊机焊接8～20毫米厚的铝板,不需要预热,正反面焊一遍即可,提高了劳动生产率和产品
In the manufacture of chemical equipment, aluminum and aluminum alloy are often used to make all kinds of containers. In the past, the welding of these equipments in our factory adopted TIG welding. Satisfactory results can be obtained when the container wall thickness is small, but when the container wall thickness is greater than 12 mm, in order to obtain good weld quality, pre-weld preheating and multi-layer welding are required to deteriorate the working conditions , Productivity is also low. Therefore developed the MDA-500 melting pole semi-automatic welding machine, using this welding machine welding 8 to 20 mm thick aluminum plate, without preheating, front and back welding can be done again, improving labor productivity and products