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一、用途随着石油、化工事业的不断发展,对于石油、天然气输送用的管道需用量也大大增加,品种也不断增多。因而,螺旋制管已向大直径厚管壁方面发展。本焊机组系采用熔剂层下双丝自动埋弧焊,焊接直径820mm 以上、板厚16mm 左右的螺旋管管坯内焊缝、外焊缝、以及螺旋管生产线上带钢尾部与另一卷带钢头部对接接缝之用。双丝焊机的两根焊丝各自独立输送。送丝速度可单独进行调节。双丝的先行焊丝为接直流焊接电源,后行焊丝为接交流焊接电源。焊接电流、电弧电压均可单独调节。
First, use With the continuous development of petroleum and chemical industry, the demand for pipes for petroleum and natural gas transportation has also increased greatly, and the varieties have also been increasing. As a result, spiral pipe has been developed to large diameter thick pipe walls. The welding unit adopts flux layer double wire automatic submerged arc welding, welding diameter 820mm above, the thickness of about 16mm spiral tube blank welds, outer welds, as well as spiral pipe production line with the tail and the other roll Strip head butt seams with. Double wire welding machine two separate wire delivery. Wire feeding speed can be adjusted separately. Double wire first wire is connected to the DC welding power supply, after the wire is connected to the AC welding power supply. Welding current, arc voltage can be adjusted separately.