基本信息:
- 专利标题： METHOD FOR BENDING NEGATIVE ANGLE PART
- 申请号：JP4108491 申请日：1991-02-13
- 公开(公告)号：JPH04258320A 公开(公告)日：1992-09-14
- 发明人： MATSUTANI MASAAKI , KUMAGAI FUMIO , YAMADA TERUO
- 申请人： TOYOTA MOTOR CORP
- 专利权人： TOYOTA MOTOR CORP
- 当前专利权人： TOYOTA MOTOR CORP
- 优先权： JP4108491 1991-02-13
- 主分类号： B21D19/08
- IPC分类号： B21D19/08
摘要：
PURPOSE:To prevent a product surface from rolling over. CONSTITUTION:In bending a product which is formed with a vertical wall part 11 and a flange part 12 with an acute angle between the product surface 10 on the peripheral apart of the product surface 10, when these vertical wall part 11 and flange part 12 are bent preliminarily, a projecting part 22 running to both sides with the boundary line 21 put between is formed and when the vertical wall part 11 and the flange part 12 are bent again, the projecting part 22, is also pressurized to prevent tensile stress from becoming excessive by flow of the material from the projecting part 22 and the product surface 10 is prevented from rolling over.
公开/授权文献:
- JP2924224B2 公开/授权日：1999-07-26
信息查询:
EspacenetIPC结构图谱:
| B | 作业；运输 |
| --B21 | 基本上无切削的金属机械加工；金属冲压 |
| ----B21D | 金属板或管、棒或型材的基本无切削加工或处理；冲压 |
| ------B21D19/00 | 折缘或其他边缘处理，如管的 |
| --------B21D19/08 | .用单独或顺序作用的加压工具，如虎口钳 |