Multistep bending machine

Details Multistep bending machine Multistep bending machine

1987-06-22

1989-05-23

Jones, David

Metal deforming

By relatively movable offset tool-faces

With tool motion in fixed path

72 7, 72441, 72461, 7245301, B21D 504

Patent

active

048318620

ABSTRACT:
In a multistep bending machine, a movable apron (LA) provided with a movable tool (D) is moved in a multistep manner up and down toward a fixed apron (UA) provided with a fixed tool (P) by a hydraulic system including a novel die-axis drive mechanism (DDM), when a foot switch (FS) is kept depressed.
In addition, an interference prevention device (IPA), a bending speed determining device (SDA), a tool distance determining device (TDA), a backgage stopper positioning device (SPA), and a backgage stopper pull-back distance controlling device (PDC) are all incorporated in the bending machine to realize a full automatic multistep bending operation.

REFERENCES:
patent: 4408471 (1983-10-01), Gossard et al.
patent: 4430879 (1984-02-01), Rolland
patent: 4486841 (1984-12-01), Koyama et al.
patent: 4488237 (1984-12-01), Aronson et al.
patent: 4511976 (1985-04-01), Graf
patent: 4656862 (1987-04-01), Kogure et al.

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