Apparatus for controlling dynamic characteristics of outer load

Details Apparatus for controlling dynamic characteristics of outer load Apparatus for controlling dynamic characteristics of outer load

1985-07-23

1987-05-26

Spruill, Robert L.

Metal deforming

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

Sensing tool or tool-linked part

72 21, 72 28, B21B 3708

Patent

active

046674969

ABSTRACT:
An apparatus for controlling dynamic characteristics of an outer load includes a crank angle detecting device which detects a crank angle and an outer load detecting device which detects the outer load, output signals of the two detecting devices are input to a controlled hydraulic pressure correcting device in which an ideal value of outer load corresponding to the crank angle has been preset, a deflection rate between the detected outer load and the ideal value of outer load is judged in accordance with the detected crank angle and, each time that the deflection exceeds a predetermined range, the output of a hydraulic source for setting a balanced pressure is controlled so as to adjust the balanced pressure.

REFERENCES:
patent: 3824821 (1974-07-01), Bergmann et al.
patent: 3825811 (1974-07-01), Smith et al.
patent: 3961510 (1976-06-01), Kovacs
patent: 4224816 (1980-09-01), Elhaus et al.
patent: 4308735 (1982-01-01), Nishi
patent: 4408471 (1983-10-01), Gossard et al.

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