| 摘要 |
PURPOSE:To grasp plate thickness accurately and perform highly efficient welding by providing displacement detectors in one of upper and lower clamping stands and providing responding members corresponding to the displacement detectors in another clamping stand. CONSTITUTION:When connecting metallic bands 1, 2, displacement detectors 9a, 10a are provided in one of upper and lower clamping stands 3a, 4a of at least one of clamping device out of a clamping device of preceding metallic band 1 or a clamping device of succeeding metallic band 2. Responding members 10a, 10b corresponding to above-mentioned displacement detectors 9a, 9b are provided in other clamping stands 3b, 4b. A control box that receives plate thickness signals of metallic bands 1, 2 from displacement detectors 9a, 10a is provided. Put out allowance of the end of plate, flash voltage, flash current, flash time and upset time are determined according to plate thickness signals of the metallic bands and material quality signals of metallic bands inputted beforehand, and the control box is made to have function to give the command. |
