Cryogenic shearing of metal
US3979981A · kind A · utility
14Cited by
6References
2Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | May 20, 1974 |
| Grant date | Sep 14, 1976 |
| Priority date | — |
| Expiry date | May 20, 1994 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T83/283
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A process for shearing metal which substantially eliminates the effects of plastic deformation in the sheared metal edge. The process comprises (1) cooling the work metal to a cryogenic temperature, and (2) shearing the cooled metal to form a sheared workpiece having edges relatively free of plastic deformation and dimensional distortion. The shearing operations contemplated by the invention include punching, blanking, piercing and slitting.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.