SU619225A1 - Rolling mill - Google Patents

Description

The invention relates to the field of rolling, in particular, to reversing rolling in irreversible cages. A mill for continuous reversing rolling is known, in which odd and even stands are combined into two groups alternately set at the rolling level. The lifting and lowering mechanisms are common for each pair of adjacent stands in the form of parallelogram rocker arms. 1 The disadvantages of this mill are its low productivity due to the simultaneous rolling of one roll only in half of the installed stands, the location of the permanent mechanisms under the stands and cooling water, as well as large dynamic loads acting on the lifting mechanisms of the stands and spindle joints caused by continuous altered The position of the working stands in the rolling process. Also known is a multi-stand rolling mill, made of a series of successive stands of the trio, installed on the same level. In each horizon, the strip is rolled in incompatible cages at the same time, which is ensured by a consistent irokatka mode, i.e., by observing the continuous rolling constant 2J. The disadvantages of a mill made according to this scheme are the need to re-adjust the speeds of all the trio's stands, with their growth at each transfer of each strip to roll from one horizon to another, the impossibility of simultaneously rolling several lanes in both horizons and, low productivity of the mill, as well as the complexity of the restructuring of electric drives. The purpose of the invention is to increase the productivity of the mill by simultaneously rolling at different levels and at the same time simplifying the adjustment of the speeds of the stands, regardless of the total number of passes. In the proposed rolling mill, the stands are installed in a cascade, i.e., with the displacement but vertical of each subsequent stand relative to the previous one in one direction. FIG. 1 shows a rolling mill, a longitudinal section; in fig. 2 - the same, end view; in fig. 3 is the same, top view, in FIG. 4 is a diagram of a rolling mill for single-handed operation that does not require the metal to be hardened during the rolling process;

in fig. 5 is a diagram of a rolling mill for a beam when one needs metal aging before the end of rolling, one of the varians; in fig. 6 is a spatial diagram of a rolling mill, explaining the principle of 5th work.

The rolling mill consists of a series of successively installed stationary adhesives “trio iln” variable duo, 2, 3 ,. each of which has work rolls 4. The rolls are cut into at least a pair of 5, 6, 8, 9, 10 gauges. Bed And structurally designed so that the output of rolled products from all rolling levels of the mill stand group is ensured.

All the stands are installed in a cascade so that in each pair of neighboring stands the lower level of one stand is combined with the upper level of another stand. The axes of pairs of gauges that are at the same level coincide. Each stand has its own non-reversible drive 12.

In order to ensure the supply of rental to the appropriate rolling levels, transport roller tables 13, 14, 15, 16, 17 are installed, which can be either stationary or lifting and saabing. Before each output gauge, tilters can be installed on both sides of the stands.

If necessary, the mill stands can be made alternating: horizontal and vertical; Universal stands can also be installed in the line.

The rolling speeds in the cages from first to last are set with one limitation; the speed of each previous stand must differ from the speed of the subsequent stand by the amount of stretching. Due to the fact that SEV & each pair of passes changes the direction of rolling, the speed of the first stand of the group will differ from the speed of the last stand only by the amount corresponding to the drawing of two adjacent calibers, t, that is, regardless of the number of stands. The speed of the roughing and finishing stands of MoryY is set to approximately equal.

The camp works as follows. The engines of all the even mill stands rotate constantly in one direction, the odd ones in the opposite direction. The workpiece is fed by the roller conveyor 13 to the upper gauge of stand 1, after rolling in which it is displaced in the horizontal plane from the axis of rolling jo of gauge 5 of stand I to the axis of gauge biv

the vertical plane to the lower level of stand 1 and the corresponding upper level of rolling stand 2, roller table 14 is fed to the upper gauge 7 of stand 2 located on the same rolling axis with the lower gauge 6 of stand 1, and continuous rolling is carried out in two adjacent calibers 6 and 7 stands i and 2; then, the roll is similarly directed to the upper caliber 8 of stand 3 and lower caliber 9 of stand 2, and then transferred to the lower caliber 10 of stand 3.

After each pair of passes, the roll is reversed by the live rolls and shifted to the next level of rolling using the roll tables 15, 16 and 17.

The performance of the rolling mill is not inferior to a continuous mill due to the implementation of simultaneous rolling in all levels of the mill, due to the provision of continuous rolling only in two-billet continuous groups that are easily adjustable. As a result of the proposed mill, the cost of electrical equipment is drastically reduced, the mill setting is simplified, and the mill downtime is reduced when the rolling program is changed.

Claims (2)

1. USSR author's certificate number 428785, cl. In 21V. 1/04, 1974.. 2. USSR author's certificate number 444574, cl. B 21 B 1/18, 1974.  Sh 3 -B --S-S-OO-D- - .-. ; ois (sssi ..-. gpue o, TpTO g Q g and