Method of punching small hole and method of manufacturing...

Details Method of punching small hole and method of manufacturing... Method of punching small hole and method of manufacturing...

2005-11-29

2005-11-29

Crane, Daniel C. (Department: 3725)

Metal deforming

With cutting

By shearing tool-couple

C029S890142

Reexamination Certificate

active

06968723

ABSTRACT:
An upper die and a lower die are provided. An unpenetrating hole is formed at an upper face of a metal board with the upper die, so that a protrusion is formed on a lower face of the metal board at a portion corresponding to the unpenetrating hole. A flat portion is formed on the protrusion with the lower die. The unpenetrating hole is punched with the upper die while supporting the flat portion with the lower die to form the through hole.

REFERENCES:
patent: 3017789 (1962-01-01), Cobb
patent: 3141358 (1964-07-01), Burke, Jr et al.
patent: 4245491 (1981-01-01), Kondo et al.
patent: 4299112 (1981-11-01), Kondo et al.
patent: 4400965 (1983-08-01), Schey
patent: 4956989 (1990-09-01), Nakajima
patent: 5125255 (1992-06-01), Brown et al.
patent: 6499836 (2002-12-01), Usui et al.
patent: 858 893 (1998-08-01), None

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