SU1342546A1 - Rolling and forging mill - Google Patents

Abstract

The invention relates to rolling production, mainly to step rolling mills, intended to produce billets of simple and shaped profiles with large cuts. The purpose of the invention is to increase the reliability of the mill by supplying dynamic forces in the drive line, reducing the weight of the mill and the drive power. The rocker arms 8, pivotally mounted on a fixed rack 3, are each connected at one end through rods 9 with rollers 2, and at the other end through rods 10 with a bed of one rolling stand. Such a kinematic scheme makes it possible to increase the amplitude of the roll rolls at 3 times less movement of the reciprocating movement of the stand. The latter circumstance allows to reduce the dynamic loads on the drive in the cage, 1 Il. $ (L Axis scroll 1 th: d a

Description

The invention relates to rolling production, mainly to step rolling mills, intended for producing billets of grown and shaped profiles with large cuts.

The purpose of the invention is to increase the reliability of the mill by reducing the dynamic forces in the line of the diode, reducing the weight of the mill and the drive power.

The drawing shows a kinematic diagram of a two-roll rolling mill.

The mill consists of a rolling stand, including a frame 1 and work rolls 2 of variable radius, and a stand 3. A stand 1 of the rolling stand is mounted on frame 4 on rollers 5 and is connected to a drive 6 of reciprocating motion. On the rack 3 on the hinges 7 mounted rocker arm 8, which are connected pivotally by the rods 9 with the work rolls 2 and t gami 10 with the bed 1 rolling mill stand.

The arrows, filled with solid lines, show the direction of movement of the elements of the mill structure at the working stroke of the rolling stand, and the arrows made with dotted lines indicate the direction of movement of these elements at the idle course of the rolling stand. The rolling stand with the bed 1 and the work rolls 2 reciprocates from the drive 6 along the rolling axis. In this case, the bed 1, acting on the th 10, rotates the rocker arms 8 around the hinge 7. The ends of the rocker arm 8, connected to the thrust arm 10, rotate along an arc in the direction of movement of the rolling stand, and the ends of the rocker arm, connected to the rods 9, . when turning in an arc, it moves in the direction opposite to the movement of the rolling stand. Due to this, and the connection of the rolls 2 by the rods 9 with the ends of the rocker arms 8, the work rolls are rotated and the workpiece 11 is crimped along the deformation cone.

Thus, in the proposed rolling-forging mill, the work rolls are rotated not only by moving the stand of the rolling stand to or from the stand 3, but also by moving the ends of the rocker arms 8 connected to the rods 9 in the opposite direction to

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movement of the bed I rolling mill stand. Due to this, the rolling stand stroke value is reduced. The reduction of the rolling stand stroke depends on the ratio of the lengths of the arms of the rockers 8. This ratio can also regulate the ratio of the speed of the rolling stand and the peripheral speed of the work rolls, hence, the magnitude of the axial forces acting on the billet during rolling. For example, when the ratio of the lengths of the arms of the rocker arms is equal to one (drawing), the size of the rolling stand 5 is reduced approximately by a factor of two. By reducing the rolling mill stroke by half, the dynamic forces on the reciprocating drive are also halved. This makes it possible to reduce the drive power, its weight, the weight of the mill as a whole and increase its reliability. When reducing the dynamic forces on the drive of the reciprocating motion, it becomes possible to increase the number of moves of the rolling stand 1.4 times, which gives an increase in the mill's productivity also 1.4 times.

Claims (1)

The proposed rolling forging mill is planned to be used for the deformation of large ingots of special steels and alloys. Invention Formula A rolling-forging mill containing a rolling stand, in the frame of which there are at least two variable-radius work rolls mounted on the frame with the possibility of reciprocating motion. Along the rolling axis from the drive, the fixed stand with the rocker arms fixed on it axes parallel to the axis of the work rolls, pivotally attached to the ends of the rocker arms, the ends of the rods, the second ends of which are connected pivotally to the work rolls, characterized in that The mill works by reducing the dynamic forces in the drive line, reducing the mill weight and drive power, it is equipped with rods, each of which is one end jointed to the stand of the rolling stand, and the other end also jointed to the second end of the corresponding rocker arm. 0 five 0 five 0 five