Forming tool for hydromechanically deep-drawing workpieces from sheet metal blanks
US7007531B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Feb 22, 2002 |
| Grant date | Mar 7, 2006 |
| Priority date | — |
| Expiry date | Sep 28, 2022 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T29/49805
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A forming tool (1) for hydromechanically deep-drawing workpieces from sheet metal blanks (2), the tool comprising a water tank (3), which acts as a lower tool and can be filled with a liquid active medium (8), thus forming the drawing die. The tool is also provided with a drawing ring (10), which is located in the upper section of the water tank (3) and is sealed against a volume of the active medium lying below. The boundary of the ring aperture (11) of the drawing ring (10) forms a drawing edge for the workpiece (2). The forming tool also comprises a drawing punch (9), which can be displaced with the sheet metal blank (2) interposed, through the ring aperture (11) of the drawing ring (10) into the section containing the active medium (8), whereby the sheet metal blank is pressed onto the drawing punch (9) using a reaction pressure as the application pressure, by means of a targeted displacement of the active medium (8). According to the invention, a water tank insert (14), which can be filled with active medium (8) to leave free the remaining water tank volume, can be positioned in the water tank (3), whereby the ring section of the drawing ring (10) lies tightly on the upper edg…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.