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一、四头CO_2保护自动焊接工艺特点我厂生产的起重机主梁中,有六条长焊缝,其跨度为4.5～22.5m。以前采用手工电弧焊,生产效率低,劳动强度大。现采用四头CO_2保护自动焊,其优点为: 1.生产效率高:由于CO_2保护焊电流强度比较大,焊接速度比手工焊快,焊后不需清渣,且四条焊缝同时焊接,生产率可提高一倍多。在焊跨度为13.5m的焊缝时,两名工人用手工焊需3工时,而用CO_2焊则需1.5工时。 2.变形小:由于四条焊缝同时焊接,可均匀加热冷却,又由于CO_2气体的冷却作用使热影响区小,因此焊后工件变形小。
One, four CO_2 protection of automatic welding process characteristics I crane crane produced in the main beam, there are six long welds, the span of 4.5 ~ 22.5m. Previous manual arc welding, low productivity, labor-intensive. Now using four CO_2 protection of automatic welding, the advantages are: 1. High production efficiency: As CO_2 shielded welding current intensity is relatively large, the welding speed faster than hand welding, welding slag without slag, and four welds at the same time welding, productivity Can be more than doubled. When welds with a span of 13.5 m are required, two workers need 3 work-hours for manual welding and 1.5 work-hours for CO 2 welding. 2. Small deformation: Since the four welds are welded at the same time, they can be evenly heated and cooled, and due to the cooling effect of CO 2 gas, the heat affected zone is small, so the deformation after welding is small.