Hydraulically operated press brake

Metal deforming – By relatively movable offset tool-faces – With tool motion in fixed path

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Details

72465, 72482, 7245314, 188371, 100258R, B21J 1304, B21D 502

Patent

active

054269660

ABSTRACT:
The press brake comprises a pressure ram member which is driven by two operating cylinders engaging the pressure ram member in the region of its two lateral ends. The pressure ram member has an upper and a lower portion which abut against each other in a central contact area and which are separated from each other by two gaps each running from the central contact area to the lateral ends, whereby the gap width continuously increases. Under load, the lower portion of the pressure ram member and the stationary ram member are deflected in the same sense. The degree of free deflection of the lower portion of the pressure ram member is limited by an adjustably mounted wedge member located in the gaps between the upper and lower portions of the pressure ram member. With this measure, the parallelism of the deflection lines is always maintained, even under extreme load situations.

REFERENCES:
patent: 3550425 (1970-12-01), Cailoux
patent: 5067340 (1991-11-01), Mac Gregor
patent: 5272904 (1993-12-01), Krumholz
patent: 5293972 (1994-03-01), Krumholz

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