| 摘要 |
PROBLEM TO BE SOLVED: To provide a manufacturing method of a rim wheel capable of high productive manufacturing of a rim wheel which suppresses vibrations transmitted to a car, improves a riding quality, reduces noises inside the car, and reduces possible causes of a failure such as defective welding, while assuring a high maneuvering stability. SOLUTION: The method for manufacturing a rim wheel having a plurality of sub air chambers 6 arranged in a circumferential direction with equal spacing, and a communicating part 8 communicating a tire main air chamber and the sub air chambers, wherein the sub air chambers 6 and the communicating part 8 form a Helmholtz resonant absorber, includes the steps of (a) forming a vertical wall 3 as a cover member for the sub air chamber 6, when casting the rim wheel, (b) enlarging the vertical wall 3 outside in a radial direction by roll-forming, (c) folding the enlarged vertical wall 3 to form an upper wall 5 as a cover member, and (d) boring the communicating part 8 in the upper wall 5. COPYRIGHT: (C)2004,JPO
|
