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 ( n 1 ), then revolution motion of the same three ( 4a ), ( 4b ) and ( 4c ) formed rolls is activated with the velocity ( n 2 ) 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 (7 c ) 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 ( 4a 1 ), ( 4a 2 ), ( 4b 1 ), ( 4b 2 ), ( 4c 1 ) and ( 4c 2 ) surfaces and the semi-finished product ( 3 ) is put into rotary motion with constant velocity ( n 3 ) in the direction opposite to the direction of rotations of the same three ( 4a ), ( 4b ) and (4 c ) formed rolls.