Wire drawing die and method of making

Details Wire drawing die and method of making Wire drawing die and method of making

2004-12-09

2008-12-30

Crane, Daniel C (Department: 3725)

Metal deforming

Tool and/or tool holder

Tool comprising closed periphery deforming passageway

C076S107400

Reexamination Certificate

active

07469569

ABSTRACT:
The present invention relates to a die comprising a die core (10) of a hard material and at least two pre-stressed rings (60, 70) of increasing diameter placed around the die core and methods of making and using the same. The die core (10) is held in place by a force generated through deformation of mating geometric features on the die and the rings (60, 70) of increasing diameter.

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H. Tracy Hall, “Hydraulic Ram Design for Modern High Pressure Devices”, The Review of Scientific Instruments, vol. 37, No. 5, May 1966, pp. 568-571.
J. Groenbaek et al. “Optimization of Tool Life & Performance Through Advanced Material and Prestress Design”, ICFG/NACFG International Cold Forging Conference, Columbus, Ohio, Sep. 2-3, 2003, pp. 1-10.

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