METAL PIPES PARALLEL FASTENING METHOD, PARALLEL FASTENING DEVICE AND PARALLEL FASTENING STRUCTURE

摘要

PROBLEM TO BE SOLVED: To fasten a middle part of the metal pipes each other by spot welding technology. SOLUTION: Two metallic work pipes 1, 2 are parallely laid and welding electrodes 3, 4 are inserted into the work pipes 1, 2 respectively. Each of the work pipes 1, 2 are clamped in a parallel direction by the clamping tools 6, 7 of a work pipe clamping device 5. The inner sides pipe peripheral wall parts 10, 11 of the work pipes 1, 2 are clamp abutted in their parallel directions with the spot welding electrodes 3, 4 via outside pipe peripheral wall parts 8, 9 in their parallel directions while the work pipes 1, 2 are press deformed in their parallel directions by the clamping force F1. The parallel direction inner pipe peripheral wall parts 10, 11 are thus spot welded each other. The plural number of work pipes 1, 2 are fastened each other being in the parallel status by this spot welding part 12.