Automatic hydraulic pin up system for a pipe bending apparatus

Details Automatic hydraulic pin up system for a pipe bending apparatus Automatic hydraulic pin up system for a pipe bending apparatus

1998-07-23

1999-03-23

Jones, David B.

Metal deforming

By relatively movable offset tool-faces

With tool motion in fixed path

72383, 72388, 723891, 723896, B21D 7025

Patent

active

058845194

ABSTRACT:
An automatic hydraulic system 10 for the actuation of the bending beds 101, 102 hinge plate 103 and pin up plate 104 of a pipe bending apparatus. The hydraulic system 10 includes a hydraulic control circuit unit 14 that controls the operation of a pin up hydraulic ram unit 11, a bending bed hydraulic ram unit 12, and a hinge plate hydraulic ram unit 13 in response to a pair of adjustable detent main control valves 81, 82 and a sequence valve 66, and adjustable hydraulic relief valve 59.

REFERENCES:
patent: 2938564 (1960-05-01), Rhodes
patent: 3934450 (1976-01-01), Reed
patent: 4331018 (1982-05-01), Doyle
patent: 5123272 (1992-06-01), Heaman
patent: 5237847 (1993-08-01), Owens
patent: 5303572 (1994-04-01), Knudson
patent: 5326249 (1994-07-01), Weissfloch
patent: 5353622 (1994-10-01), Theener
patent: 5598736 (1997-02-01), Erskine
patent: 5600993 (1997-02-01), Heaman

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