| 摘要 |
PURPOSE:To manufacture with good efficiency and Al wheel as an integrally forming body by performing the press forming of a discoid Al plate stock with a press forming device further after forging it in the wheel blank for vehicle between the upper and lower dies of a hammer forging equipment. CONSTITUTION:The discoid Al stock close to the thickness of the wheel disk center part of the manufactured is placed between the upper die 2a and lower die 2b of a hammer forging equipment, and formed in the state of projecting the outer side rim part 11 with the sufficient thickness in the direction intersecting at right angles with a disk part 10 and projecting the inner side rim part 12 on the extension of the disk part 10 surface to the outer side of the outer side rim part 11. The Al wheel for vehicle is then manufactured as an integrally forming body b y performing the rear part extrusion forming until the outer side rim part 11 of the forming blank becomes in the aiming length of the outer side rim part by using a press forming equipment.
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