Refuging system for emergency of transfer feeder

Details Refuging system for emergency of transfer feeder Refuging system for emergency of transfer feeder

1995-06-15

1999-08-10

Crane, Daniel C.

Metal deforming

With randomly-actuated stopping

7240516, 7240513, 72 205, 72 213, 192150, B21D 4305, B21D 5500

Patent

active

059341254

ABSTRACT:
There is provided a refuging system for transfer bars of a transfer feeder of a transfer press, in which the transfer bars are driven by a transfer bar driving mechanism including an induction type servo motor. The refuging system includes a servo control for controlling the induction type servo motor, a detector for detecting an occurrence of an abnormal condition of the servo control and urgently stopping operations of a slide of a press body of the transfer press and the induction type servo motor, a detector for detecting a crank angle of the press body and discriminating an area in which the slide or a mold of the press body interfere with the transfer bar of the transfer feeder or an attachment therefor attached to the transfer bar, and a driver for driving the transfer bar to a position at which the slide and the mold of the press body do not interfere with the transfer bar of the transfer feeder and the attachment by applying an A.C. voltage to the induction type servo motor at a time when the operations of the slide and the induction type servo motor begin to be urgently stopped in the interference area.

REFERENCES:
patent: 3746184 (1973-07-01), Wallis
patent: 4627253 (1986-12-01), Tennessen
patent: 4653311 (1987-03-01), Tack
patent: 4702363 (1987-10-01), Sofy

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