Control system for pneumatic punch press feeders
US4290541A · kind A · utility
Inventor
Key dates
| Filing date | Apr 25, 1980 |
| Grant date | Sep 22, 1981 |
| Priority date | — |
| Expiry date | Apr 25, 2000 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21D43/11
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A pneumatic control system for a semi-automatically operating feeder for punch presses and the like. A pair of interconnected main three-way valves control the operation of the fluid motors that respectively actuate the reciprocally mounted feed slide and the stock gripping means carried by the feed slide. These two three-way valves are adapted to be controlled by a trigger means that includes a pair of serially coupled two-way valves that are sequentially mechanically actuated by a control plunger, and by a stroke reverse means that includes a safety valve feature that will operationally accommodate small leaks that may be present in the associated portions of the control circuit so as to prevent the inadvertent initiation of an undesired feed-index cycle of movement of the feed slide.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.