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CO_2气体保护焊接具有效率高,质量好成本低等许多优点。是我国近几年来在机械工业中重点推广的焊接新技术。目前,在生产中较为广泛使用的主要是细丝,粗丝使用的还不多。我厂试验用φ3～φ5毫米的08Mn2Si等四种成分的焊丝,进行了工艺性能和机械性能等多次试验,找出了焊丝成分对产生气孔的规律性以及对机械性能的影响等,在此基础上采用φ3毫米08Mn2Si焊丝的CO_2气体保护自动焊代替埋弧自动焊,焊接φ2200×6760毫米的水泥磨取得了一定成绩。在保证质量的前提下大幅度提高了劳动生产率,降低工人的劳动强度,它与埋弧自动焊相比较,提高效率4倍以上,节省两倍以上的焊丝和大量焊剂。目前,国内CO_2气体保护自动焊使用的导电咀全是整体结构,接触不好,焊接稳定性差,在试验过程中经过长期观察、实践、根据埋弧自动焊用的导电咀结构再结合台钻钻头的夹紧机构,设计制造出来装配式导电咀,它与整体式导电咀相比较,导电性能好,焊接过程稳定,使用寿命长,对今后推广粗丝CO_2气体保护自动焊能起到一定作用。
CO_2 gas shielded welding has many advantages, such as high efficiency, good quality and low cost. In recent years, China is in the machinery industry to promote the welding of new technologies. At present, the more widely used filaments in production are not used for thick filaments. I plant test with φ3 ~ φ5 mm 08Mn2Si other four kinds of wire, the process performance and mechanical properties of several tests to find out the composition of the wire to produce stomatal regularity and the impact on mechanical properties, in this Based on the use of φ3 mm 08Mn2Si wire CO_2 gas automatic welding instead of submerged arc welding, welding φ2200 × 6760 mm cement mill has achieved some success. Under the precondition of guaranteeing quality, it greatly improves labor productivity and reduces labor intensity of workers. Compared with submerged arc welding, it improves the efficiency by more than 4 times and saves more than twice as much wire and a large amount of flux. At present, all the conductive plugs used in domestic CO2 gas protection automatic welding are all the whole structure, the contact is not good and the welding stability is poor. After long-term observation and practice during the test, according to the conductive nozzle structure for submerged arc automatic welding combined with bench drill Compared with integral conductive nozzle, it has good conductivity, stable welding process and long service life, and plays an important role in the promotion of the automatic welding of carbon dioxide gas shielded by thick carbon wire in the future.