APPARATUS FOR CONTROLLING BENDING AND SPRINGING ANGLES IN TUBE BENDING MACHINE TOOL Russian patent published in 2003 - IPC

FIELD: machine engineering, possibly manufacture of tube bending machine tools for tube storage. SUBSTANCE: apparatus for controlling bending and springing angles in tube bending machine tools includes bending gage, clamping trough. pickup for sensing rotation angle of bending gage; pickup of tube springing angle. Pickups are in the form of limit switches and they are secured to carriage having drive unit. Bending gage is mounted on shaft. Apparatus also includes shaft with disc having dial and equal-arm lever with flag on ends. Said lever is set according to dial by bending angle α, Then drive unit is energized for rotating bending gage 1 and for transmitting rotation to disc with dial and to lever. When flag approaches pickup signal for reversing drive unit is formed. Bending gage rotates by springing angle β. Carriage with pickup for sensing bending angle and springing angle moves until flag engages with pickup. Then tube afterbending is realized. Flag rotates by angle 2β, respectively and bending gage rotates for bending tube by angle exceeding preset angle value by springing angle β. Next operations of bending tube by angle equal to sum of bending angle and springing angle are performed until time moment of taking signal of springing angle pickup without reversing rotation sign of drive unit. EFFECT: simplified design of apparatus. 2 cl, 5 dwg