Method for controlling a pipe bending machine

Details Method for controlling a pipe bending machine Method for controlling a pipe bending machine

1996-06-17

1997-11-04

Larson, Lowell A.

Metal deforming

By deflecting successively-presented portions of work during...

By use of work-contacting wiper and moving, work-holding form

72 201, 72155, 72369, B21B 3708, B21D 704, B21D 905

Patent

active

056827814

ABSTRACT:
For the advance of the slide rail of a pipe bending machine, a hydraulic cylinder (22) is provided. The pressures (P1,P2) on both sides of the piston (23) of the cylinder (22) are detected, and from these pressures, the actual value of the advance force (F) is calculated. A set value generator (49) generates the set value (Fs) of the advance force in dependence on the respective rotational angle (.alpha.) of the bending template. A controller (48) controls a throttle valve (42) such that the actual value (Fi) follows the set value (Fs). Thus, a power control of the slide rail advance is effected.

REFERENCES:
patent: 3303683 (1967-02-01), Schmidt
patent: 4201073 (1980-05-01), Eaton
patent: 4970885 (1990-11-01), Chipp et al.
patent: 5259224 (1993-11-01), Schwarze
patent: 5343725 (1994-09-01), Sabine

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