Control drive for a ram adjustment device on a blanking press

Details Control drive for a ram adjustment device on a blanking press Control drive for a ram adjustment device on a blanking press

1978-07-10

1983-05-31

Truhe, J. V.

Electricity: motive power systems

Positional servo systems

Adaptive or optimizing systems including 'bang-bang' servos

318632, 72 19, 100257, G05B 1300

Patent

active

043863043

ABSTRACT:
In control drives for high speed blanking presses, a serious problem of excessive tool wear arises from increases in the immersion depth of a top tool into its associated bottom tool when the stroke frequency increases. To overcome this, a control drive is provided wherein the top tool is held at a substantially constant immersion depth in the opening in the bottom tool over the entire stroke frequency range of the press. A measuring instrument detects the stroke frequency. This detected frequency is fed into a control circuit programmed with a characteristic corresponding to either immersion depth or ram adjustment as a function of stroke frequency. The output of the control circuit is a control signal coupled to a drive motor to maintain the constant immersion depth.

REFERENCES:
patent: 3233441 (1966-02-01), Dunlap
patent: 3441818 (1969-04-01), Tiskus et al.
patent: 3684961 (1972-08-01), Muir
patent: 4116122 (1978-09-01), Linder et al.
patent: 4122379 (1978-10-01), Richter et al.

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