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齐齐哈尔铁路工程一处在为齐齐哈尔变压器厂装配车间制造50t、6m跨重级工作制工字型焊接钢板吊车梁中,采用气割下料手工电弧焊接工艺获得成功。该梁为3号镇静钢,高1m,翼缘厚18mm,腹板厚16mm,K形坡口对接焊,立缝全部要求焊透。其经验是,先在钢板划好线的两头各点焊上一小块钢板,采用自动切割机(0号割嘴)切割,在切割机随划线每前进1.5m,随即将已割0点焊一下,等切割完钢板恢复常温后,再将两头点焊的小块钢板锤击掉,切割的氧压力为0.75～0.8MPa.
The Qiqihar Railway Project No. 1 is manufacturing 50-ton and 6-meter-span heavy-duty I-beam welded steel crane beams for the Qiqihaer Transformer Plant Assembly Workshop. The successful use of the gas cutting and cutting manual arc welding process. The beam is No. 3 killed steel, height 1m, flange thickness 18mm, web thickness 16mm, K-shaped groove butt welding, vertical seam all require penetration. The experience is that a small piece of steel plate is welded on the two points of the steel plate and the automatic cutting machine (cutting nozzle No. 0) is used to cut. The cutting machine advances 1.5m along with the scribe line, and then it has already cut 0 points. Welded, after cutting the steel plate to restore room temperature, then the two spot welding of a small piece of steel hammer, cutting the oxygen pressure of 0.75 ~ 0.8MPa.