Patent ID: 6943315
Filing Date: 2005-09-13
Classification: B23K

Abstract:
1. An automatic robot spot welding apparatus for use in a fabrication process of a skeleton, which spot welds guide tubes for power control rods and an instrumentation tube for measuring an intra-reactor status to spacer grids having a plurality of cells into which fuel rods are inserted, the automatic robot spot welding apparatus comprising: a welding bench including clamping frames, which are uniformly arrayed and have receiving portions for the spacer grids, and have, at both ends of the welding bench, fixing plates for the guide tubes and the instrumentation tube which are inserted into the spacer grids; a robot moving on a running rail, which is arranged in parallel to the welding bench, and having a welding gun for welding the spacer grids with the guide and instrumentation tubes; guide tube electrodes for being inserted into the guide tubes for the spot-welding; an instrumentation tube electrode for being inserted into the instrumentation tube; and a controller having an apparatus control block and a robot control block for controlling components based on a program stored therein.