The welding method of welded pipe is mainly using the skin effect and proximity effect of high frequency current, so that the height of the current is concentrated on the welding edge, so that it can be heated to the welding temperature in one percent seconds, and then the pressure welding is carried out under the action of the extrusion roll. This welding method has the characteristics of small heat affected zone and fast heating speed.
The welding pipe of Ji'nan galvanized pipe manufacturers can greatly improve the welding speed and weld quality, and can be used as blank without pickling, shot peening and cutting edge steel. At the same time, alloy steel, high alloy steel and nonferrous metal pipe can be welded, so the unit energy consumption is greatly reduced. A variety of metal welded pipes can be produced with a set of welding equipment. For different metals, the welding power and welding speed must be changed correspondingly.
In addition, when using the high frequency welded pipe method, the contact head can be set at different distances from the junction point. When the tube is moving, the contact head can slide along the top or bottom of the welds. The contact head from the top to the welding edge is most widely used, because the adoption of such a scheme makes the structure of the welding device simple and reliable.
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