SU997865A1 - Reduction mill two-stand unit - Google Patents

Description

The invention relates to pipe production, and more specifically to the design of the stands of the reduction mill, and can be used on continuous reduction mills when hot-rolled pipes of increased precision in diameter.

The three-roll mill stand of the reduction mill is known, which includes a housing, three drive rolls and a mechanism for radial adjustment of the roll solution in the form of an eccentric, En1p co. &Amp;W; roll and their rotation drive 1.

The adjustment mechanism of the roll solution works in t jelvs conditions, since it has not been cleaned of scale and water, j.

A three-roll cage is known, comprising a casing, three drive rolls, the supports of which are mounted in eccentric bushings and a mechanism for radial adjustment of the rolls, made in the form of a drive disc with spiral teeth and three cylindrical cams with eyelets coupled to it through earrings associated with eccentric bushings . The adjustment mechanism is hermetically closed, which eliminates the ingress of water and scale 12 into it,

However, the movement of the rolls is carried out manually and it takes a lot of time to adjust.

The closest to the invention to the technical essence is a two-cell unit of the reduction mill, containing a stanila, two three-roll stands, successively installed with offset connector planes, and

10 drive rotation of the rolls from the bracket 31.

However, the stands do not have a mechanism for the radial adjustment of the rolls and this does not allow obtaining exact pipes in diameter.

15

The aim of the invention is to increase the dimensional accuracy of the reduction pipes by automatically adjusting the gauge during rolling. at

The goal is achieved by

20 that the two-branch unit of the reduction mill, which includes a bed, two three-roll 1 chains, successively installed with a displacement of the plane of the connector and a drive of rotation of the rolls from

Claims (2)

25 brackets, which are equipped with driven me; radial movement chanisms. . rolls in the cage, each of which through a reducer is connected to one end of the output shaft of a common electric motor 30 l, and an inclined frame carrying an electric motor with gears mounted rotatable relative to the vertical axis with the possibility of fixation in parallel and perpendicular to the axis of the block from one side opposite to the drive arrangement of the rotation rollers. Such a constructive implementation of the reduction mill unit allows to INCREASE the performance of the reduction mill due to a more rapid simultaneous adjustment of the roll solution in two finishing cells, to improve the accuracy of the pipes by diameter due to the possibility of timely automatic adjustment during the pipe slacking process, convenient connection and separation of equipment, installed on and off the cages and the quick transfer of the latter from the working position to the position to replace the finishing stands of the inclined engine two gears on the swing frame. FIG. 1 shows the proposed unit; in fig. 2 is the same, side view with the image of the frame in two positions; in fig. 3 - the same, top view; in fig. 4 - kinematic diagram of the radial adjustment of the rolls; in fig. 5 kinematic cage diagram (longitudinal section); in fig. b - kinematic diagram of the block with the image of the roll rotation drive; The billet block of the reduction mill consists of a bed 1, two cages 2 and 3 with three drive rolls 4 having mechanisms 5 of radial movement of the rolls, each of which are connected through gears 6 and 7 with horses 8 and 9 of the output shaft of the common electric motor 10, the inclined rotary frame 11. The mechanism of radial movement has worms 12 located at different levels relative to the axis of the block due to displacement of the planes of the connector of the stands, worm wheels having disk 13 with Archimedes' spiral with which the cams 14 are coupled by a gear cut through earrings 15 connected to eccentric sleeves 16 bearing the supports of the legs. The rotational momentum is distributed by the input shaft 17 of the stand rolls from the engine 18 through the gearbox 19 with two clips 20. The device operates as follows. The motor 10, through two gearboxes b and 7 and two spindles, simultaneously rotates both screws 12 of the mechanisms 5 of the radial movement of the rolls, as a result of which in each mechanism rotates the worm wheel with a disk 13 with helical teeth coupled to the disk by a serrated cut, the cams 14 move in the radial direction and through the earrings 15 rotate the eccentric sleeve 16, shifting the axis of the rolls 4 in the radial direction. In this case, the pivoting frame 11 is in the working position, fixed by means of hinged bolts. When the handling of the stands 2 and 3 is not exceeded, the input shafts (rolls) of the stands are freed from the shackle 20, and the spindles are released from the couplings and removed. The hinged bolts are released, and the inclined frame rotates perpendicular to the axis of rolling in such a way that it does not prevent the stands from being removed. In this position, the frame is again secured by hinged bolts. New stands are installed in the same frame position. After the installation of new finishing cells, it is rotated to its original position and fixed. The spindles are installed and secured in the working position with the help of couplings. The input shafts of the stand rolls are connected to the clamp 20. The finishing stands of the reduction mill are again ready for operation. Equipping any reduction mill with the proposed unit contributes to increasing mill productivity and increasing pipe accuracy in diameter. The expected economic effect from using the proposed unit by increasing mill productivity is 120 thousand rubles. in year. Claims The two-stalk unit of the reduction mill comprising a stand, two three-roll stands, successively installed with displacement of the planes of the connector and a drive rotation of the rolls from the bracket, characterized in that in order to increase the dimensional accuracy of the reduced pipes by automatically adjusting the gauge during rolling, it is equipped with mechanisms for the radial movement of the rolls in the cage, each of which through a reducer is connected to one end of the output shaft of an o6jgero electric motor and, by an inclined frame, carrying electric trodvigatel with gearboxes, mounted pivotally about a vertical axis to be fixed in the parallel and perpendicular to the axis of the block positions on the side opposite the drive arrangement rotating rolls. Sources of information taken into account in the examination 1. USSR author's certificate In 184789, cl. B 21 JS 13/08, 1964.. 2. USSR author's certificate No. 354913, cl. B 21 B 17/14, 1971. 3, Zeldovich LS, Furlender G.A. Distribution of loads in the drive of the stand with three inputs of torque. Works VNIImetmash. Sat No. 37. M., 1974, p. 15-22. AND IB