While turning the frictional stick whose major diameter

摘要

PROBLEM TO BE SOLVED: To execute building up welding of a hole part with suppressing deformation and strength lowering due to heat in a method and a device for building up welding the hole part. ;SOLUTION: A method consists of a process to insert a sleeve 4 formed with a welding material in a hole part 3a, and a process to press fit a friction bar 1 formed so that a part of an outer diameter is larger than an inner diameter of the sleeve or the outer diameter is gradually tapered off toward its tip, or having a recessed and projection part on an outer peripheral surface while rotating.;COPYRIGHT: (C)2000,JPO