Metal bending press with removable upper beam
US3969921A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 31, 1975 |
| Grant date | Jul 20, 1976 |
| Priority date | — |
| Expiry date | Mar 31, 1995 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB30B15/04
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A press for press bending of metal plates comprises two end frames between which are arranged upper and lower beams which between them form a press gap. Each of the end frames preferably comprises two spaced apart columns interconnected at the top and bottom via yokes, the parts being pressed together to form a force-absorbing frame by means of a surrounding tension biased wire bandage. The end portions of the beams are received in the respective spaces formed between the columns of the end frames. In the working position the upper beam is forced towards the upper yokes of the end frames, and in the unloaded state the upper beam is arranged to be laterally movable through the opening in at least one end frame to permit removal and insertion of a workpiece in the press. Hydraulic cylinders are loadably mounted along both sides of the lower beam in order to support a pressing tool which is raisable and lowerable relative to the upper beam by means of the hydraulic cylinders, the hydraulic cylinders being located in registration with force-carrying surfaces of the pressing tool which extend over the length of said pressing tool.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.