| 摘要 |
PROBLEM TO BE SOLVED: To provide a flash welding method for construction steel members with a large cross-section, by which the problem of the local buckling of construction members to be welded is solved, by which welding can be conveniently performed with excellent execution property and precision, and which is economical. SOLUTION: Reaction plates 3 or reaction bands are mounted on the steel members with the large cross-section to be welded, the reaction plates 3 or the reaction bands of two steel members with the large cross-section are connected with each other to be welded, by plural straight line drive type actuators 5, and electrodes 6 for power feeding are mounted on the respective steel members with the large cross-section. By pressuring with a synchronized displacement control for a flash process and an upset process by the actuators 5, the butt welding of joining surfaces is performed.
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