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船体平面分段的平板构件,是由多塊平板拼合后焊接成的。平板构件的双面自动焊,我厂以往只用于5毫米厚以上的鋼板。对4毫米厚的鋼板均采用手焊封底的單面自动焊,因为用双面自动焊經常产生烧穿、气孔、焊芯歪等現象,焊缝返工率达70～80％。近几个来,采取了一些措施,取得了良好的效果,焊缝返工率降到3～4％。現将采取的措施介紹如下,供大家参考。 1.采用和改装-500型自动焊机:以往焊薄板用TC-17型自动焊机,用这种焊机有些缺点,机头不能
Plane flat segment of the flat-panel components, is a plurality of flat-panel welded together. Flat-panel components of the double-sided automatic welding, I used to plant more than 5 mm thick steel plate. For the 4mm thick steel plate, single-sided automatic welding with hand-welding back cover is adopted. Because double-sided automatic welding often causes burn-through, air holes and welding core crookedness, the weld rework rate reaches 70-80%. In recent years, some measures have been taken and good results have been achieved. The rework rate of the welding seam has dropped to 3 ~ 4%. Now take the measures described below, for your reference. 1. Adoption and modification -500 automatic welding machine: Previous welding sheet TC-17 automatic welding machine, with some disadvantages of this machine, the head can not