| 摘要 |
PROBLEM TO BE SOLVED: To fix both relative position and angel between pipe joints and tubes of piping as a piping manufacturing drawing at the time of welding the pipe joint to the tubes of piping. SOLUTION: A pipe joint fixing jig 7 moving in the X, Y direction on a table 1 and horizontally turning is provided. A third carrier 10 vertically moving and turning around a Y axis is provided in a support 9 disposed upright on the table 1, and a turnable tube cramping device 13 is provided on a mount 10b. The optional position A of the tube is clamped with the tube cramping device 13 so that the end part of the tube becomes vertical at the time of tack welding the pipe joint. A coordinate (x, y) of the pipe joint center taking the position A as origin, a height (z) from the end surface of the pipe joint to the position A, the inclining angleθX around the X axis and the inclining angleθY around the Y axis of the tube at the position A and the angleθZ of rotation of the pipe joint in a horizontal plane are calculated from the piping manufacturing drawing, and the position and attitude of the tube and the pipe joint are adjusted based on the result to execute tack welding.
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