Method and apparatus for forming blind holes in sheet material

Details Method and apparatus for forming blind holes in sheet material Method and apparatus for forming blind holes in sheet material

2005-11-30

2008-08-26

Crane, Daniel C (Department: 3725)

Metal deforming

By use of closed-die and coacting work-forcer

Forcing work into or within closed die; e.g., forging

C072S379200, C072S377000

Reexamination Certificate

active

07415859

ABSTRACT:
A method of forming blind holes in a sheet material is provided. The method includes forming a recessed segment in the sheet material, stamping the recessed segment between a tapered punch and a pad to form a blind hole having a sealed end and a sidewall, wherein the pad includes a profiling pin that is enclosed by the sealed end and the sidewall. The method further includes forming a material channel interposed between the tapered punch and a tapered die, and compressing the material channel to generate a material flow into the sidewall. The material channel may be narrowed to allow more material flow into the sidewall for additional sidewall thickness.

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Related U.S. Appl. No. 11/289,638, filed Nov. 30, 2005; Inventors: Ser et al.
Office action issued in U.S. Appl. No. 11/289,638, dated May 21, 2007.
Office action issued in U.S. Appl. No. 11/289,638, dated Jul. 12, 2007.

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