| 摘要 |
PROBLEM TO BE SOLVED: To provide a circumferential weld apparatus comprising: an air-cylinder driven centering jig to be inserted into a tubular member; a motor-driven rotor supported rotatably on an axis common to the centering jig; and a welding torch supported by the rotor, and, in the circumferential weld apparatus, the end portion on the side opposite to the centering jig of a piston rod of an air-cylinder device does not extend through the rotor but can be shortened in the axial length.SOLUTION: A circumferential weld apparatus is so equipped at a rotor with an air-cylinder device as rotates together with the rotor.SELECTED DRAWING: Figure 3 |
