In practical welding situations, an important factor which affects the weld quality is a shunt effect. when the first weld is made and the subsequent weld is being made, the weld quality is deteriorated due to a shunt current which flows the existing spot weld. This effect is called shunt effect.
Since the mechanism of thermal and electrical behavior with the shunt effect in the spot weld has not been well known, it is very difficult to compensate for the shunt effect.
Thus in this work, the above behaviors is studied through theoretical and experimental analysis for the compensation of the effect during the resistance spot welding. The thermal and electrical behavior in weldment is numerically analyzed by F.D.M. and compared with the experimental results.
As a result, the shunt current in various welding conditions is calculated and the effect of shunt to monitering signals in spot weld, dynamic resistance and electrode movement, is studied.
