| 摘要 |
PROBLEM TO BE SOLVED: To provide a spot welding method where a shear reinforcing bar can be spot-welded to a main beam reinforcement, so as to obtain welding strength equal to or above standard yield point strength without damaging its toughness. SOLUTION: In the spot welding method for a shear reinforcing bar spot-welded to a main beam reinforcement in a reinforced concrete beam for housing at a prescribed pitch, without undergoing a preheat stage, welding current is made to flow through the main beam reinforcement and the shear reinforcing bar so as to perform normal welding (a normal welding stage A), a tempering/cooling time almost equal to the energizing time in the welding current is taken (a tempering/cooling stage B), and tempering current by about 75% of the welding current is made to flow for a time almost same as the energizing time in the welding current, and tempering welding is performed (a tempering welding stage C), thus the welding strength of the shear reinforcing bar with respect to the main beam reinforcement is controlled to the value equal to or above the standard yield point strength of the shear reinforcing bar. COPYRIGHT: (C)2007,JPO&INPIT |
