Device for regulating the blank-holding force in a press
US5477723A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 28, 1991 |
| Grant date | Dec 26, 1995 |
| Priority date | — |
| Expiry date | Aug 28, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21D22/22
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
Fluidic regulating device intended to be placed between a blank-holder and the sliding member serving to displace the blank-holder. It comprises for example a body (11) intended to be mounted on the abovementioned sliding member (4) in such a way as to be driven by the latter, said body (11) accommodating at least one compact fluidic jack (12) and comprising at least one pipe (13) for feeding a pressurized fluid into the jack or jacks (12), the piston (15) of each jack being attached to a movable member (16) intended to work in conjunction with and displace the blank-holder (3) with respect to said body (11), in such a way that, when the displacement of the abovementioned sliding member is stopped by a stop (18), before the blank-holder (3) has come into contact with a blank placed on or against the die (2), the force exerted by the blank-holder on said blank is determined by the pressure of the fluid injected into said jack (12) and can vary during the stamping cycle.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.