| 发明名称 |
PRODUCTION METHOD OF WHEEL RIM, AND PRODUCTION METHOD OF VEHICLE WHEEL RIM |
| 摘要 |
A production method of a wheel rim includes: a step of forming a cylindrical rim material into a rim shape; and a step of increasing a sheet thickness of at least one opening end edge of the rim material at least one of before and after the step of forming of the cylindrical rim material. In addition, in the step of increasing of the sheet thickness, in a state in which the opening end edge is inserted into an annular groove of a die provided with the annular groove which is wider than the sheet thickness of the opening end edge, a thickened portion is formed by exerting a compressive load in an axial direction of the rim material on the opening end edge. |
| 申请公布号 |
US2016332210(A1) |
申请公布日期 |
2016.11.17 |
| 申请号 |
US201515111548 |
申请日期 |
2015.03.12 |
| 申请人 |
NIPPON STEEL & SUMITOMO METAL CORPORATION |
发明人 |
KASEDA Yoshiyuki;MIKAZUKI Yutaka |
| 分类号 |
B21D53/30;B21K21/12;B21K1/38 |
主分类号 |
B21D53/30 |
| 代理机构 |
|
代理人 |
|
| 主权项 |
1. A production method of a wheel rim comprising:
a step of forming a cylindrical rim material into a rim shape; and a step of increasing a sheet thickness of at least one opening end edge of the rim material at least one of before and after the step of forming of the cylindrical rim material, wherein, in the step of increasing of the sheet thickness, in a state in which the opening end edge is inserted into an annular groove of a die provided with the annular groove which is wider than the sheet thickness of the opening end edge, a thickened portion is formed by exerting a compressive load in an axial direction of the rim material on the opening end edge. |
| 地址 |
Tokyo JP |
