Press-forming method of a sheet and apparatus therefor
US5755129A · kind A · utility
10Cited by
5References
21Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | May 2, 1996 |
| Grant date | May 26, 1998 |
| Priority date | — |
| Expiry date | May 2, 2016 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21D22/22
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A sheet pressing method and apparatus using a die and a punch. The invention encompasses holding a sheet between the die and a blank holder to form a first contact surface between the die and the sheet and a second contact surface between the sheet and the blank holder; forming a third contact surface between the punch and the sheet; supplying a pressurized liquid to at least one contact surface; and pressing the sheet through the die with an aid of the punch.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.