Low force auto-open tooling for tube bending machine

Details Low force auto-open tooling for tube bending machine Low force auto-open tooling for tube bending machine

1995-10-06

1997-04-08

Larson, Lowell A.

Metal deforming

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

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

72158, 72 213, B21B 3708, B21D 704, B21D 905

Patent

active

056177534

ABSTRACT:
A tube bending machine is provided which includes a rotatable bend die about which the tube is bent and a rotatable clamp die disposed outwardly of said bend die and movable to secure the tube between the clamp die and the bend die. A clamp die positioning system is provided which includes a drop-away clamp die holder supporting the clamp die, a hydraulic cylinder directly attached to the die clamp holder which advances and retracts the clamp die holder, and an electro-pneumatic control system which drives the cylinder at preselected pressures. The electro-hydraulic control system includes a hydraulic pump, a directional valve which varies the direction of flow of the hydraulic fluid to the cylinder, a proportional pressure reducing valve which varies the pressure of the hydraulic fluid, and a microprocessor controller which provides control signals to set the pressure to the preselected levels. The control also includes an encoder for providing the actual position of the clamp die to the controller which monitors a following error of the clamp die. The clamp die is moved from a retracted position to a position near a clamping position at a low pressure. If the clamp die encounters an obstacle, indicated by the following error increasing to a level above a predetermined level, it is automatically returned to the retracted position. Once the clamp die is near the clamping position, the pressure is increased to a required clamping pressure for the bend and the clamp die is moved to the clamping position.

REFERENCES:
patent: 2911031 (1959-11-01), Yurka, Jr.
patent: 4178788 (1979-12-01), Zollweg et al.
patent: 4537053 (1985-08-01), Schwarze
patent: 4788845 (1988-12-01), Schwarze

Affiliated with

Also associated with

Rating

Low force auto-open tooling for tube bending machine does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Low force auto-open tooling for tube bending machine, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Low force auto-open tooling for tube bending machine will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2392272