Metal deforming – By use of non-deforming work-gripping clamp and relatively... – With interrelated clamp closer and tool mover
Patent
1997-02-05
1998-07-28
Jones, David
Metal deforming
By use of non-deforming work-gripping clamp and relatively...
With interrelated clamp closer and tool mover
72319, 72387, 724529, B21D 504
Patent
active
057849161
ABSTRACT:
A die assembly includes a forming portion to form a negative angle portion when an upper die is lowered in a straight line to abut a lower die. A cylindrical rotating cam with a groove formed therein in the axial direction is rotatably mounted in the lower die. A negative angle forming portion is formed in the groove edge portion of the rotating cam. A slide cam with a negative angle forming portion is mounted on the second upper die in such a manner to be opposed to the rotating cam. An automatic return device is provided on the lower die for rotating and retracting the rotating cam to enable the removal of the workpiece from the lower die after the forming process is complete. The rotating cam includes a plurality of rotating cam members, the rotation axis positions of which differ and are parallel to one another.
REFERENCES:
patent: 4365500 (1982-12-01), Klukow
patent: 4535619 (1985-08-01), Gargrave
patent: 4558582 (1985-12-01), Meinig
patent: 4875356 (1989-10-01), Boardman et al.
patent: 5347838 (1994-09-01), Matsuoka
Jones David
Umix Co., Ltd.
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