Device for straightening and cutting metallic wire
US4743730A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 15, 1986 |
| Grant date | May 10, 1988 |
| Priority date | — |
| Expiry date | Sep 15, 2006 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB23H7/10
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A device installed on a traveling wire EDM apparatus for straightening the electrode wire and providing the electrode wire with a needle point end for facilitating manual threading of the electrode wire through close tolerance closed wire guide members. The device takes the form of a pair of spaced-apart current conductive metallic studs, a heat shield being located at some intermediate portion between the metallic studs. The metallic studs are connected across a source of electrical power. A length of wire proximate its end is held manually over the metallic studs, with an intermediate portion of the wire disposed within the heat shield, and a pull is manually exerted on the wire beyond the metallic studs while the wire is being heated by electrical current flow through the wire between the two metallic studs. The wire is heat-straightened and ruptures at its portion within the heat shield, with sharp needle point ends being formed at the point of rupture.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.