Method and apparatus for adjusting stroke length of a ram for pr

Details Method and apparatus for adjusting stroke length of a ram for pr Method and apparatus for adjusting stroke length of a ram for pr

1979-04-02

1981-08-11

Crosby, Gene P.

Metal deforming

By relatively movable offset tool-faces

With tool motion in fixed path

72441, B21D 502

Patent

active

042827388

ABSTRACT:
This invention relates to a method and apparatus for adjusting a stroke length of a ram for a press. The stroke length of the ram is adjusted with respect to a base point. The hydraulic pressure level in the acting chanber is also adjusted. The press is generally used for bending metal sheets. By this invention, an optimum stroke length of the ram in the press can be easily determined without experimentally processing and, therefore, wasting sheet metal workpieces.

REFERENCES:
patent: 2797724 (1957-07-01), Walldow
patent: 3534679 (1970-10-01), Forichon
patent: 3633395 (1972-01-01), Anderson
patent: 3841140 (1974-10-01), Hryc
patent: 3874205 (1975-04-01), Roch

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