Method and apparatus for forming a cup-shaped member

Details Method and apparatus for forming a cup-shaped member Method and apparatus for forming a cup-shaped member

2005-12-12

2009-12-01

Tolan, Edward (Department: 3725)

Metal deforming

By use of closed-die and coacting work-forcer

Cup or shell drawing

C072S348000

Reexamination Certificate

active

07624611

ABSTRACT:
A method for forming a cup-shaped member, including a first pressing step of pressing a plate into a first cup-shaped intermediate molded body, and a second pressing step of pressing the first cup-shaped intermediate molded body into a second cup-shaped intermediate molded body having at least one annular bearing surface that extends perpendicular to an axial direction of the second cup-shaped intermediate molded body and are disposed on a radial-inward projection having an increased wall thickness. During the second pressing step, an outer circumferential periphery of the first cup-shaped intermediate molded body is ironed to facilitate plastic flow radially inwardly directed from the inner circumferential periphery thereof by restraining plastic flow directed toward an open end periphery and a bottom thereof.

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patent: 2004-358553 (2004-12-01), None

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