AN IMPROVED FLASH BUTT WELDING SYSTEM AND A PROCESS FOR WELDING OF BOILER TUBES

摘要

An improved flash butt welding system and an improved for welding of boilertubes process is a solid state joining technique that uses arc heating of thecomponents to be joined, the arc being struck between two tubular components,for example, and then magnetically rotated rapidly around the circumference.The arc disrupts the surface oxides and softens the interfacial material withoutnecessarilymelting it, and the components are then forced together to force outthose oxides and leave only clean material in the joint. The known technique isrestricted to thin-walled components, as the arc tends to travel along theperiphery of the components. The improved flash butt welding machine forwelding of thick walled steel tubes and solid steel rods and bars are proposed bythe invention. The process according to the invention has no flashing cycles.Generallyflashing is not allowed in the areas where oil vapour is present like gulfcountries. For welding without flashing, this processcan be used.