| 摘要 |
PURPOSE:To improve the weld strength and smoothness of weld zones by irradiating laser beams to the respective ends of a pair of foils to weld the ends to suporting members and welding padding members in the lap portions of the molten region thereby filling the recesses. CONSTITUTION:Ends 2a, 2a, 2a', 2a' of the foils 2, 2' wound on a cylindrical surface 1 are abutted on the exposed portions of a pin 13 forming part of the cylindrical surface 1. This produces a slight clearance between the respective ends. Next, laser welding is so performed that beads 3a, 3a' overlap in the form that the center of weld beads is deviated slightly to the right and elft from the center X of the clearance L, then the foils 2, 2' melt stick to the pin 13 and are sured to a body 7 by way of the pin 13. A recess 5 dented from the tape slide contact surface 2C is formed in a weld zone 3. Thereupon, a wire 15 is placed in the recess 5 and laser build-up welding is performed, whereby the recess 5 is buried. The weld zone 3 is smoothed by subsequent working. |
