Method of self-regulation of output energy of forging hammers us

Details Method of self-regulation of output energy of forging hammers us Method of self-regulation of output energy of forging hammers us

1987-01-05

1987-12-15

Spruill, Robert L.

Metal deforming

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

Sensing work or product

72 20, 72438, 364476, 173 8, 91247, B21T 916

Patent

active

047124059

ABSTRACT:
A forging hammer employs compressible fluid to drive the ram into impact and a trapped volume of compressible fluid to cause the ram to be retracted from impact position when fluid driving the ram into impact is released. The velocity of impact is adjusted by the timing of the opening of a valve allowing variable amounts of compressed fluid into a cylinder from a compressible fluid supply. As the ram is driven into impact, the compressible fluid which causes the ram to be retracted is compressed and increases in pressure. The peak of pressure in this trapped volume of compressible fluid is sensed and compared with a peak value of reference pressure which represents a desired impact energy. If there is an error between the measured peak and the desired peak effect, an incrementing or decrementing signal is provided to correct the valve to adjust the effect of the next blow.

REFERENCES:
patent: 3142206 (1974-07-01), Hague et al.
patent: 3464315 (1969-09-01), Weyer
patent: 3818799 (1974-06-01), Hague
patent: 3916499 (1975-11-01), Frame et al.
patent: 3930248 (1975-12-01), Keller
patent: 4116122 (1978-09-01), Linder et al.
patent: 4131164 (1978-12-01), Hague et al.

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