Press brake with improved ram leveling adjustment

Details Press brake with improved ram leveling adjustment Press brake with improved ram leveling adjustment

1976-12-02

1978-01-31

Lanham, C.W.

Metal deforming

By relatively movable offset tool-faces

With tool motion in fixed path

72450, 72446, B21D 706

Patent

active

040708969

ABSTRACT:
A press brake having improved ram leveling adjustment is disclosed. The press brake is preferably one having a hydraulic-mechanical power actuator for advancing and returning the ram. The power actuator includes a pair of bell cranks pivotally supported on an upright frame by a pair of horizontally spaced pivots, a hydraulic piston and cylinder motor for oscillating one of the bell cranks, and a link connecting like arms of the bell crank for causing parallel motion of the bell cranks. Leveling adjustment of the ram is obtained by providing horizontally spaced parallel links which are independently adjustable in length to interconnect the ram and second like arms of the bell cranks. An independently controlled reversible motor is operatively associated with each adjustable link for selectively lengthening or shortening the link, and an indicator is associated with each link to indicate position adjustment of each link.

REFERENCES:
patent: 1422779 (1922-07-01), Perony
patent: 1694585 (1928-12-01), Dreis
patent: 2136856 (1938-11-01), Long
patent: 2237170 (1941-04-01), Williamson
patent: 2946234 (1960-07-01), Jahnke
patent: 3162232 (1964-12-01), Munschauer
patent: 3587286 (1971-06-01), Fritsch
patent: 3763690 (1973-10-01), Kirincic

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