Method and apparatus for safety for presses
US4466317A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Aug 12, 1982 |
| Grant date | Aug 21, 1984 |
| Priority date | — |
| Expiry date | Aug 12, 2002 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T83/626
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method of and apparatus for controlling the movement of a workpiece to be processed in a punch press is disclosed in which after the workpiece is processed by contact of a ram on the upper tool of the press and the ram is momentarily out of contact with the upper tool, the recontact of the ram and upper tool is detected and then the processed workpiece is moved out of the processing position. In addition, the apparatus detects when the ram has returned to the proximity of the top dead center of the eccentric shaft which drives the ram and when the processing of the workpiece has been completed. The apparatus is also provided with a monitoring system which detects a malfunction in the control apparatus.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.