Metal deforming – With use of control means energized in response to activator... – Metal deforming by use of roller or roller-like tool element
Patent
1978-10-25
1980-07-01
Mehr, Milton S.
Metal deforming
With use of control means energized in response to activator...
Metal deforming by use of roller or roller-like tool element
72319, B21D 1104
Patent
active
042100070
ABSTRACT:
A bending machine for imparting bends to metal plates and the like, also called a brake, and provided with a plate holding table and a plate clamping mechanism. The plate is bent by contact with a pivoting apron. In order to provide automatic adjustment of the distance between the front edge of the bending apron and the metal plate to be bent, i.e., to provide a variable radius of curvature during the bending operation, the bending apron is mounted in slides on its pivotal support arms. The motion of the bending apron in its slides is provided by mechanical lead screws or by hydraulic jacks. In one embodiment, the distance of the front edge of the bending apron from the metal plate is controlled so as to balance the torque provided by an electric torque motor and the counter-torque offered by the plate being bent. In another embodiment, the linear motions of the bending apron are controlled to follow a template whose contour defines the desired radius of curvature. A secondary control system assures the parallelism of the linear motions of the bending apron.
REFERENCES:
patent: 2438319 (1948-03-01), Kilham
patent: 2915106 (1959-12-01), Green
patent: 3188848 (1965-06-01), Barrett
patent: 3914974 (1975-10-01), DeVore
Mehr Milton S.
Picot S.A.
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