Automatic crimper and crimping die
US4703643A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 11, 1986 |
| Grant date | Nov 3, 1987 |
| Priority date | — |
| Expiry date | Jul 11, 2006 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB21D39/04
- WIPO fieldMachine tools
- WIPO sectorMechanical engineering
Abstract
The present invention relates to a machine for crimping a workpiece. The machine of the invention comprises a bed plate, a conical shaped bowl adjacent the bed plate, and a ram reciprocal substantially upward and downward along an axis toward and away from the bowl. A crimping die assembly comprising a plurality of circumferentially disposed die fingers attached to a die retaining ring is disposed adjacent to the bowl for receiving a workpiece. A driving means is provided for advancing the ram toward the die assembly, and a pusher assembly comprising a single pusher ring is provided to transmit the forces of the ram to the die assembly. The driving means has a variable length stroke, and the length of the stroke is controlled by matching a reference voltage with a comparative voltage on a balancing circuit. The diameter of the circle embraced by the die fingers is correspondingly reduced as the die fingers are advanced into the conical shaped bowl. An improved die assembly and a method of using the crimping machine of the invention are also provided.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.