Sheet-bending press incorporating a device for continuous monito

Details Sheet-bending press incorporating a device for continuous monito Sheet-bending press incorporating a device for continuous monito

1985-02-04

1987-02-03

Larson, Lowell A.

Metal deforming

With use of control means energized in response to activator...

Sensing tool or tool-linked part

72 26, 72 30, 72389, 72702, B21D 500

Patent

active

046401130

ABSTRACT:
A press has an upper table carrying a punch and a lower table bearing a tool-carrier. A jack for compensating the deflection inherent in the bending process is fitted in the lower table. The bending device enables the bending angle obtained in the workpiece to be monitored continuously. The bending device includes a series of paired measuring rods, circular in section and longitudinally machined to provide a flat surface for the lower surface of the workpiece to rest on, associated with devices for measuring the rotational angle of the measuring rods, and a control device connected to the rotational angle measuring device, to a device for controlling the jacks that actuate the punch and to the actuating device of the jack for compensating the deflection. A very accurate and constant bending angle is obtained throughout the length of the workpiece. The bending process is automatic and continuous once the operator has fed in the required bending angle.

REFERENCES:
patent: 3156287 (1964-11-01), Munro
patent: 3990291 (1976-11-01), Evertz et al.
patent: 4408471 (1983-10-01), Gossard et al.

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