Negative-angle press-working die

Details Negative-angle press-working die Negative-angle press-working die

2008-06-18

2010-02-23

Ross, Dana (Department: 3725)

Metal deforming

By relatively movable offset tool-faces

Embodying three or more coacting relatively movable tools

C072S315000, C072S452900

Reexamination Certificate

active

07665341

ABSTRACT:
To enable formation at a negative angle with deep bending and forming a high-quality panel, a negative-angle press-working die includes an elevatable pad fixed to an upper die, a slide cam supported to be slidable laterally on the upper die or a lower die and having a bending blade, a rotary cam rotatable about a rotational center having a bending part which forms a negative-angle portion on a workpiece and a cam surface abutting on the slide cam, an elevatable slide body disposed under the pad so as to be rotatable together with the rotary cam and having a hold part provided at an upper portion on a bending part side of the rotary cam and constituting a part of a male die for workpiece forming, a drive unit that rotates the rotary cam to a workpiece working position, and a slide drive unit that slides the slide body in an up and down direction.

REFERENCES:
patent: 6196040 (2001-03-01), Matsuoka
patent: 7243524 (2007-07-01), Kinoshita
patent: 2008/0098792 (2008-05-01), Nieschulz
patent: 59-197318 (1984-11-01), None

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