CO2气体保护焊陶瓷衬垫单面焊双面成型的技术探讨
2020-09-10沈根平




摘要:近年来,随着大型船舶建造和大型钢结构现场安装的焊接的需要,CO2气体保护焊陶瓷衬垫单面焊双面成型工艺在生产中广泛应用。在实际造船和钢结构生产中,存在大量开坡口板与板的对接焊以及开坡口的管板全熔透角焊缝,传统的做法是打底焊,填充焊,盖面焊,然后背面碳弧气刨清根,并采用角向磨光机打磨光亮,去除飞溅、毛刺等杂质后,再进行背面焊接。采用CO2气体保护焊陶瓷衬垫单面焊双面成型,可以一次成形,省去了碳弧气刨的环节、打磨的工作,特别是一些背面没办法焊接的地方,生产效率大大提高,在工程实践中得到广泛的应用。
Abstract: In recent years, with the construction of large ships and large steel structure on-site installation of welding needs, CO2 gas shielded welding ceramic liner single-sided welding double-sided forming process has been widely used in production. In actual shipbuilding and steel structure production, there are a lot of open groove plate and plate butt welding and open groove tube plate full penetration fillet weld, it may be traditional for the backing welding, filling welding, cosmetic welding, and then on the back of the carbon arc air gouging root, and uses the angle grinder grinding light, after the removal of impurities such as splash, burr, then take welding on the back. The use of CO2 gas shielded welding ceramic liner single-sided welding double-sided forming, can be formed at a time, save the carbon arc air planning, polishing work, special is some back can not be welded, the production efficiency is greatly improved, in engineering practice has been widely used.
關键词:CO2气体保护焊;陶瓷衬垫;单面焊双面成型
Key words: CO2 gas welding;ceramic liner;single-sided welding double-sided forming
0 引言
CO2气体保护焊(简称CO2焊)是一种高效的焊接方法,在大型船舶分段建造上得到了广泛的应用。提高了整个造船焊接的生产率和降低了劳动生产成本。CO2气保护焊的劳动生产率比手工电弧焊高,尤其是大厚板焊时几乎是手工电弧焊的3倍以上。但是对于平角焊缝,CO2焊与铁粉焊条手工焊效率几乎相同,有时候陶瓷衬垫CO2焊单面焊比双面手工电弧焊效率高不了多少,因此有人认为CO2焊只有在特定的条件下才有明显效果。而在某些场合下高的效率被它较大的劳动强度所抵消。其实不然,人们忽视了一个十分重要的问题,即焊接变形。在任何情况下,采用CO2焊,整个结构的变形量是最小的。而手工电弧焊,不仅局部变形大(如焊缝角变形)而且整个结构变形量也大,甚至结构走样,需投入大量的火工进行矫正,这在施工现场是经常发生的现象。……
