Welding is widely used for many structures. Residual stress is generated near the bead because of locally given heat. Tensile residual stress degrades fatigue strength. Some methods for reduction of residual stress are developed. Residual stress is also generated when wheel is welded. In this paper, a new method for reduction of residual stress using vibration is proposed. As vibration, ultrasonic vibration is used. An improved device for transmission of vibration is used. By using the proposed method, tensile residual stress is reduced.
