| 摘要 |
PROBLEM TO BE SOLVED: To obtain a flash welding apparatus which can easily and automatically change over a valve for needing coating oil or no coating oil by supplying electric power without loading an electric power source for change-over valve on a rotary shear. SOLUTION: In the case of needing the coating with the oil 14 according to the materials of both members 1, 2 to be welded from information in a data table 47, the electric power supplied from a control unit 45 at the outer part of the rotary shear 7 is transmitted to respective fixed side transmitting parts 39b, 49b and further, under non-contacting state, this electric power is transmitted to respective moving side transmitting parts 39a, 49a to supply this electric power to a three directional change-over type respective motor- driven ball valves 35, 36. Then, the respective motor-driven ball valves 35, 36 are changed over so that the oil 14' spouts from the respective nozzles 17, 18 through respective connecting pipes 15, 16. Further, the oil 14 spouted from respective pumps 19, 20 is applied on the cutting-off surfaces of both members 1, 2 to be welded while linking with the cutting-off motion of the rotary shear 7. COPYRIGHT: (C)2004,JPO
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