Punch for cold forming operations

Details Punch for cold forming operations Punch for cold forming operations

2007-12-21

2009-02-17

Jones, David B (Department: 3725)

Metal deforming

By use of closed-die and coacting work-forcer

Cup or shell drawing

C072S273000, C072S370010, C072S373000, C072S379200, C076S107100, C140S105000, C407S119000

Reexamination Certificate

active

07490502

ABSTRACT:
A cemented carbide tool containing tungsten carbide, titanium carbide, niobium carbide, possibly TaC, cobalt, chromium and possibly nickel, iron, molybdenum is disclosed. The composition of the materials provides a lighter material than usual, combined with a good resistance to corrosion as well as high hardness and wear resistance. These properties are particularly interesting for the manufacture of punch tools for cold forming operations. Cold forming tools made with these materials will have much better performance, particularly more steady performance and much longer lifetime. A method of cold forming and drawing, particularly deep drawing and ironing process of aluminum and steel beverage can manufacturing, is also disclosed.

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patent: 1 557 230 (2007-07-01), None
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