A method of rolling extrusion with regulated axis spacing of axi-symmetrical stepped parts

摘要

The way of rolling extrusion with regulated axis spacing of axi-symmetrical stepped parts is characterized in that a formed semi-finished product (3) in the form of a bar or tube part is placed in the seat of the front rotary holder (1) and in the seat of the back rotary holder (2), next, the front rotational holder (1) and back rotational holder (2) together with semi-finished product (3) move with a translational motion with constant velocity (V) into the workspace, which is made by the same three (4a), (4b) and (4c) formed rolls, next the same three (4a), (4b) and (4c) formed rolls are put into rotational motion in the same direction and with the same velocity (n1), then revolution motion of the same three (4a), (4b) and (4c) formed rolls is activated with the velocity (n2) and the same three (4a), (4b) and (4c) formed rolls are brought closer to the semi-finished product (1), yet rotary movement trajectories (7a), (7b) and (7c) of the same three (4a), (4b) and (4c) formed rolls are of spiral shape, next the semi-finished product (3) is affected by the (4a), (4b) and (4c) formed rolls working (4a1), (4a2), (4b1), (4b2), (4c1) and (4c2) surfaces and the semi-finished product (3) is put into rotary motion with constant velocity (n3) in the direction opposite to the direction of rotations of the same three (4a), (4b) and (4c) formed rolls.