Press forming method
US9452461B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 26, 2013 |
| Grant date | Sep 27, 2016 |
| Priority date | — |
| Expiry date | Dec 26, 2033 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21K23/02
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A press forming apparatus (1a) consecutively carries out: a first step of pushing a flat plate-shaped workpiece into a die (14) by a forming punch (11), to form the workpiece into a cup-shaped workpiece (B); a second step of making the cup-shaped workpiece (B) move relatively to a position where a space (S2) is formed between a cup bottom part (B2) and the forming punch (11) by a holding down member (12) abutting on an end part of a cup vertical wall part (B1); and a third step of making a counter punch (13) approach the forming punch (11), to push a cup bottom part (B2) to a forming punch (11) side so that the cup bottom part (B2) is compressed by the forming punch (11) and the counter punch (13), making a material of the cup vertical wall part (B1) flow to a cup shoulder part (B3), thereby to thicken the cup shoulder part (B3).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.