METHOD OF CUTTING COLLARS FROM THE ROUND BILLER Russian patent published in 1995 - IPC

FIELD: mechanical engineering. SUBSTANCE: cutting off of collars from the round billet is carried out by the combined action of the roller and the parting-off tool. First on the exterior surface of the round billet a groove with the depth by 0.1-0.5 mm less than its thickness is cut through with the parting-off tool. Then the collar is separated from the formed bridge of the roller cutting edge. After that the remaining bridge of the cutting edge of another roller is detached from the round billet. The rollers are mounted on the common axis so that the distance between their cutting edges measured along the axis was equal to the width of the parting-off tool. The diameter of the cutting edge of the roller detaching the collar from the bridge is by 1-2 mm more than that of the cutting edge of the second roller. EFFECT: enhanced life of parting-off tools. 2 cl, 2 dwg