RESISTANCE WELDING DEVICE FOR END PLUG OF NUCLEAR FUEL ROD

摘要

PROBLEM TO BE SOLVED: To eliminate the burden on electrodes at the time of welding work and to prevent the damage on cladding pipes and end plugs. SOLUTION: The cladding pipe 2 is held by bisected clamping. members 3 and bisected pipe electrodes 6 are brought into contact with the peripheral surface of the cladding pipe to feed electricity thereto. The end plug 25 is held by a collet 19 expandable in its diameter and is pressed and moved by an end plug electrode 18 on the rear surface, by which the end plug is brought into pressurized contact with the cladding pipe 2. The end plug electrode 18 and the collet 19 are held in a recessed part 17 of a slidable electrode shaft 15. A sliding chamber 12 for forming a chamber 28 in pressurized contact with the pipe electrode 6 is held slidably with the outer periphery of the electrode shaft 15. A positioning means 30 for positioning the front end 2a of the cladding pipe to the welding position and an end plug supplying means 40 for supplying the end plug 25 to the collet 19 are advanceably and retreatably arranged between the pipe electrode 6 and the end plug electrode 18.