| 摘要 |
PURPOSE:To manufacture a wheel of high strength, high productivity and low cost, by forming as one body a rim part and a disk part separately by use of a heat treatment type Al alloy of the same material quality, and thereafter, using a rim part consisting of a thick-walled and hollow ingot blank material when combining them. CONSTITUTION:A hollow ingot made of an Al alloy 34 is heated in a heating part 35, and thereafter, ring rolling is performed by a rolling part 36, and an inside circumference 31a which becomes a fitting face to a disk is cut by a cutting part 37, by which a prescribed rim 31 is obtained. Subsequently, an ingot made of an Al alloy 38 is formed to a disk of a prescribed shape through a heating part 39 and a forging part 40, and thereafter, the maximum outside circumferential face 32a is cut by the cutting part 41, by which a prescribed disk 32 is obtained. Or a circle plate 42 of the same blank material is brought to cold spinning by a spinning part 43, is formed to a disk, and thereafter, cutting is performed by a cutting part 41'. This rim 31 and the disk 32 are subjected to shrinkage fit by a fitting part 44, are subjected to MIG or TIG welding by a welding part 45, and thereafter, hardening and tempering are executed by a heat treating part 46, necessary drilling is performed by a machining part 47, and a product wheel 33 is completed. |
