Method for producing an end lug of a spring member formed of a strand of wire, and apparatus for manufacturing same
US7334445B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Mar 18, 2005 |
| Grant date | Feb 26, 2008 |
| Priority date | — |
| Expiry date | Dec 26, 2025 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21F35/02
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
A method and apparatus for producing an end lug of a spring member formed of a strand of wire, the strand of wire is initially gripped by two clamping jaws or a pair of tongs, held between said clamping jaws and, subsequently, at a predetermined distance behind the gripping tongs, while forming a rear wire segment protruding behind the spring element, is severed. In this regard, a shaping jaw conforming to the shape of the lug is employed as the one clamping jaw of the gripping tongs, around which the wire segment is bent by means of a shaping pin that can be inserted directly behind the other clamping jaw perpendicular to the longitudinal center line of the wire segment over the latter to form the lug. The relative movements between the shaping pin and the shaping jaw required for this purpose are generated by means of program-controlled movements of the gripping tongs and/or shaping pin.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.