FIRE CRACKER ARC WELDING METHOD AND COATED BACKING MADE OF NON-MAGNETIC METAL FOR FIRE CRACKER ARC WELDING

摘要

PURPOSE: To improve the forming ratio of excellent bead, and to reduce the pit by using a coated backing made of non-magnetic metal, and executing the fire crack welding while pressing the fire cracker welding material and its arc generating part toward the corner part to be welded of the base metal. ;CONSTITUTION: A contact point 5 which works as the top of the force based on the gravity is provided on the surfaces of the fire cracker welding material 2 which is provided with a coated backing 3 and divided into two by the line, i.e., Y axis connecting the center 21 of the fire cracker welding material to the intersection 22 of a corner part to be welded formed by the base metal 1 relative to the fire cracker welding material 2. In addition, this coated backing 3 is provided with a contact means 6 which can realize the positional adjustment so as not to act as the top of the force based on the gravity to the base metal 1, or so as to act as a small top even when working as the top of the force based on the gravity. The welding position is the flat position, and the fillet welding is executed. The amount of the stuck spatter to the base metal is small.;COPYRIGHT: (C)1994,JPO