Cutting – Processes – With reorientation of tool between cuts
Patent
1975-09-08
1978-05-30
Abercrombie, Willie G.
Cutting
Processes
With reorientation of tool between cuts
83 74, 83530, B26D 128, B26D 726
Patent
active
040916987
ABSTRACT:
A rotary cutting blade control system which automatically varies the feed rate to maintain a constant material removal rate. The system senses the current in an electric motor driving the cutting blade and automatically adjusts the feed rate to maintain the motor current constant. The system adjusts a hydraulic valve in the hydraulic system operating the blade support to move the blade in or out whenever the current deviates from a standard which is set by the operator. The control system also includes a circuit for detecting when the load on the blade has dropped below a preset level indicating that the blade has completed the cut and automatically commands the hydraulic system to return the blade to a start position. An additional control circuit operating in conjunction with the no-load sensing circuit automatically produces a command to stop the blade close to the work piece to save time and motion when multiple cuts are being performed. This circuit operates by establishing a reference level indicating the position of the blade at the start of a cut.
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Obear Robert F.
Rist Bruno A.
Abercrombie Willie G.
Western Gear Corporation
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