Forming tool for multiple-thickness blanks

Details Forming tool for multiple-thickness blanks Forming tool for multiple-thickness blanks

2008-01-22

2008-01-22

Jones, David B (Department: 3725)

Metal deforming

By use of closed-die and coacting work-forcer

Cup or shell drawing

C072S060000, C072S057000

Reexamination Certificate

active

07320239

ABSTRACT:
An apparatus for forming blanks having two thicknesses separated by a blank step includes a forming tool defining a binder surface that is characterized by a tool step, a first region on a first side of the tool step, a second region on a second side of the tool step, and a bead segment having a surface contiguous with the second region. The bead segment is configured to pinch material from a blank into any gap created between the tool step and the blank step caused by misalignment of the blank in the tool, thereby ensuring an effective seal to form the blank against a forming surface.

REFERENCES:
patent: 6047583 (2000-04-01), Schroth
patent: 6745604 (2004-06-01), Morales
patent: 6997025 (2006-02-01), Friedman et al.
patent: 7210323 (2007-05-01), Kruger et al.

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