Clamping apparatus for press brake
US5065610A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Feb 27, 1991 |
| Grant date | Nov 19, 1991 |
| Priority date | — |
| Expiry date | Feb 27, 2011 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21D5/0236
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
An upper portion (3a) of an upper-die (3) is fixedly secured to a lower portion (2) of a ram (1) extending horizontally by way of a first clamping member (5) and a second clamping member (6) therebetween from both the fore side and the back side. The second clamping means (6) comprises a plurality of press plates (8)(8) arranged side by side in the horizontal direction. An opperating oil chamber (20) of a hydraulic cylinder (19) provided in each press plate (8) is connected in communication to a pressurized oil outlet port (42) and to a pressurized oil inlet port (41) both of which are opened in laterally opposed end surfaces (8b)(8a) of the press plate (8) respectively. The pressurized oil outlet port (42) and the pressurized oil inlet port (41) facing each other of the adjacent press plates (8)( 8) are connected in communication to each other by means of an interconnection pipe ( 23).
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.