Two piece punch for roll piercing materials
US5794502A · kind A · utility
Inventors
Key dates
| Filing date | Dec 20, 1993 |
| Grant date | Aug 18, 1998 |
| Priority date | — |
| Expiry date | Dec 20, 2013 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T83/9464
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A punch roll which may be used in existing roll piercing systems. The punch roll has radially oriented punches which cooperate with dies upon coordinated rotation to pierce holes in material. The punch roll features a two-piece construction. The two pieces include an annular ring which is maintained in coaxial relationship with a cylindrical member. In the preferred embodiment, the cylindrical member has axially oriented spline-like recessed portions formed in the peripheral surfaces thereof. The recessed portions are preferably oriented parallel to the axis of the member. In the punch roll annular member, the radially oriented bores provide a close tolerance sliding fit with a first portion of a punch. The second portion of the punch has a larger cross-section than the first and is received in the recessed portion located between the annular ring and the cylindrical member. In this manner, the bores in the outer member and the recesses in the cylindrical member cooperate to retain the punches in preselected radially oriented positions. In the punch roll, the innermost portion of the punch abuts the peripheral surface of the cylindrical member and thereby transmits all of the force…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.