Punching unit
US8578829B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jun 7, 2010 |
| Grant date | Nov 12, 2013 |
| Priority date | — |
| Expiry date | Oct 24, 2031 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T83/944
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
There is provided a punching unit capable of punching holes in high-performance by increasing a punching force and by rotating a punch. A guide hole that guides the punch in the vertical direction is formed to have a narrow upper part, a wider lower part and inclined surfaces between them. An actuation pin engages with a cam and the punch moves up and down to punch a hole when a cam member reciprocates. The actuation pin abuts with the inclined surface of the guide hole at the punching position, so that the punch is rotated and a cam inclined angle is reduced by an inclined angle of the guide hole, allowing a large punching force.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.