| 摘要 |
A method and apparatus for manufacturing an exhaust pipe assembly for an engine which are capable of decreasing a temperature difference between a seam-welded outer surface and a seam-welded inner surface at the time of seam welding. An exhaust pipe assembly manufacturing apparatus (70) comprises an outer circumferential electrode wheel (71) abutted on an outer circumference of a mounting ring (41), a pressing means pressing the outer circumferential electrode wheel (71) to the mounting ring (41), an inner circumferential electrode wheel (103) abutted on an inner circumference of a pipe (40) making up an exhaust pipe assembly, a transformer serving as a voltage supply means for supplying a predetermined voltage to the outer and inner circumferential electrode wheels (71 and 103), and a controller for control of voltage of the transformer. Thickness (T1) of the outer circumferential electrode wheel (71) is formed larger than thickness (T2) of the inner circumferential electrode wheel (103). |
