| 摘要 |
PURPOSE:To sufficiently take the depth of a weld bead and besides, to prevent the generation of an indentation due to welding shrinkage on the peripheral side end of the weld bead by forming the welding abutting surface on the slant and forming a projecting part on the peripheral side part of a weld zone. CONSTITUTION:The welding abutting surface 32 inclined from the direction orthogonal to the wheel-axis direction is formed by machining on the rear of the flange 18 root of a disk 14. As a result, it is made possible to fit the direction of a laser beam 30 and the depth of the weld bead can be maintained in the necessary quantity. In addition, the welding abutting surface to extent with the same inclination as that of the welding abutting surface 32 formed on the disk from the peripheral surface of a rim 16 is formed by machining on the disk side end of the rim 16 and on the disk side end from the peripheral surface of the rim 16. As a result, at the time of performing laser beam welding, since the projecting part 42 is irradiated and molten with the laser beam 30 and molten metal fills up the shrinkage formed formerly on the peripheral end of the weld bead 52, the indentation is not formed on the peripheral end of the weld bead. |
