Punch assembly with improved disassembly features
US5054347A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 17, 1990 |
| Grant date | Oct 8, 1991 |
| Priority date | — |
| Expiry date | Sep 17, 2010 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T83/949
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A punch assembly is described for a punch press having a quick tool change capability. The punch assembly comprises a punch sleeve having a punch slidably mounted therein. A tang extends from the sleeve, and a bolt is connected between the tang and the punch. An ejection spring member is mounted between the tang and the bolt for yieldably biasing the bolt in the direction of the punch. An elastic retraction member is mounted in the sleeve for biasing the punch and tang toward one end of the sleeve. Means is provided for retaining the ejection spring and bolt within the punch assembly during partial disassembly thereof so that only the punch is removed during said partial disassembly while the ejection spring and bolt remain in place when the punch is withdrawn after the bolt is unscrewed from the punch. A screw-threaded punch length adjustment platen is threadedly connected between the tang and the punch for adjusting the distance that the punch extends from the punch assembly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.