Patent ID: 8610023
Filing Date: 2013-12-17
Classification: B23K

Abstract:
1. A method for manufacturing an exhaust pipe assembly including one or more exhaust pipes, each exhaust pipe having a mounting ring fixed at a first end thereof, comprising the steps of: abutting an outer circumferential electrode wheel on an outer circumference of said mounting ring attached to an outside of the first end of said exhaust pipe; abutting an inner circumferential electrode wheel on an inner circumference of said exhaust pipe; supplying a voltage to said outer circumferential electrode wheel and said inner circumferential electrode wheel; and performing a seam welding while rotating said outer circumferential electrode wheel and said inner circumferential electrode wheel to manufacture said exhaust pipe assembly, wherein a thickness of a center radial portion of said outer circumferential electrode wheel is greater than a thickness of a center radial portion of said inner circumferential electrode wheel, in order to make, in a top-view, a contact area between the outer circumferential electrode wheel and the mounting ring substantially equal to a contact area between the inner circumferential electrode wheel and the exhaust pipe.