Metal deforming – With use of control means energized in response to activator... – Sensing tool or tool-linked part
Patent
1998-01-09
1999-06-08
Crane, Daniel C.
Metal deforming
With use of control means energized in response to activator...
Sensing tool or tool-linked part
72296, 72301, B21D 1102
Patent
active
059101830
ABSTRACT:
A stretch-forming machine of the type wherein a pair of opposed curving jaws grips opposing ends of a metal sheet to be stretch-formed in a curved configuration. Each of the jaws are formed of an array of adjacent grippers movable relative to each other by respective hydraulic cylinders to define a part of the curve of the jaw. The improvement to the stretch-forming machine which is the subject of this application comprises a closed-loop servo-control means for moving each one of the grippers into a predetermined position relative to each other. Each of the servo-control means comprises a hydraulic cylinder position controller carried by the hydraulic cylinder of the one gripper for controlling hydraulic fluid flow to the hydraulic cylinder responsive to stored data representing the desired predetermined position of one of the grippers. A motor is provided for actuating the position controller in response to the data received by the position controller to move the hydraulic cylinder. Hydraulic cylinder position feedback means is positioned on the hydraulic cylinder for sensing the position of the hydraulic cylinder and communicating a signal representing the position of the hydraulic cylinder to the position controller.
REFERENCES:
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GEC Alsthom-Cyril Bath, "Innovative process technology for the metal forming industry", entire brochure, published prior to Jan. 9, 1998.
The Cyril Bath Company, "The stretch forming process for metal parts--An illustrated explanation of stretch forming technology, applications, specifications and controls", entire booklet, 1984.
Ford Jesse Carl
Polen Larry Alexander
Crane Daniel C.
GEC Alsthom Cyril Bath
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