SU1219187A1 - Arrangement for continuous reducing of metal in rolls - Google Patents

Description

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The invention relates to ferrous and non-ferrous metallurgy, and can be used in non-subsurface rolling mills, as well as in the most appropriate devices for moving workpieces in continuous and semi-continuous casting machines.

The purpose of the invention is to reduce the metal content and increase accuracy. rolling.

FIG. 1 schematically shows a continuous rolling mill; in fig. 2 shows section A-A in FIG. one.

Continuous rolling mill (Fig. 1 has working stands 1-6 (their number may be different) with engines 7 and gearboxes 8. Press devices 9-11 are installed between adjacent working stands, each of which serves two stands,

In the pressing devices (Fig. 2), the cushions 12 of the work rolls 13 are mounted for movement in the guide frames 14 on the arms 15 having a common axis of rotation 16. These levers are connected through hinges and glands 17 to a pressure and loading device 18 (hydraulic cylinder).

When adjusting the working stand to the size, the necessary solution of the working rolls 13 is established by moving the sub-tube 12 with the lever 15 and 16 and 17 from the pressure and loading device 18.

In operation, the work rolls keep the installed solution until the pressing force of the rolls is within the limits of the set. As this force increases (thickening on the ingot), the solution changes to the set limit. The gap between the rolls varies, without disturbing the position of the common rolling axis. A symmetrical change in the gap of the work rolls allows smoothing their work, thereby increasing the reliability of the work stands and increasing rolling accuracy.

In addition, rolling accuracy is enhanced by reducing the longitudinal thickness variation caused by local thickenings or supercooled areas in the deformable surface.

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billet. If a site of increased strength and thickness (with a lower temperature) occurs at the point of contact with the roller of the roller table, then

5 passing, for example, the stand 3, its rolls 13 can move apart, which leads to an increase in the solution of the rolls in the neighboring stand 4o. Therefore, the force in stand 4 is reduced and

0, the proportion of the force generated by the device 18 thaws on the portion of the rolls of the stand 3 will melt. With a significant thickening of the workpiece, in the case of the passage of this section through the rolls

15 of this stand, the rolls of the next stand can be so displaced that their contact with the workpiece is broken and the entire force of the loading device acts on the rolls of the first stand.

20 The proposed design is characterized by the fact that the preloading force is applied through a common pressure and loading device to two working cells. Automatically

25, this force is redistributed so that its larger share is applied to the pair of lids in which the more thickened area of the workpiece is deformed, which significantly reduces the thickness variation and the accuracy of rolling. If one pair of rolls breaks, then all the force is applied to the second pair and it will be possible to finish pouring 35 this melt and moving the ingot on a continuous casting machine. The overload of the stands in the construction is excluded due to the provision of the limiting force by the cylinder 18 (Fig. 2) and the calculation

40 on the strength of all elements of the cage on this particular effort. In the rolling stands of continuous casting machines, where the swathes are small (2-4 mm), the rolls of the adjacent stands can be installed in

45 is the same with respect to the rolling axis, position, but the rolls of the second (along the cutting path) of the cage should be made of a larger diameter, which will provide the necessary ratio of reductions.

50 The use of the proposed device will reduce the metal intensity of the equipment and improve rolling accuracy.

FIG. 2

Compiled by M, Korovin Editor E. Papp Tehred I. Veres Proofreader E. Sirohman

1187/13 Circulation 518 Subscription

VNIIPI USSR State Committee

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab ,, d, 4/5

Branch ShSh Patent, Uzhgorod, St .: Project, 4

Claims (2)

1. DEVICE FOR CONTINUOUS COMPRESSION OF METAL IN ROLLS, including two working stands with rollers mounted in pillows and pressure devices, connecting spindles and a drive, characterized in that, in order to reduce the metal consumption and increase the accuracy of rolling, the pressure devices are made with a common drive for both stands. 2. The device according to π. 1, characterized in that the pressing devices of the stands are made in the form of levers mounted for rotation on a common horizontal axis, pivotally and cross-connected with the pillows of both stands, said levers being connected by hinges and rods with a common drive. FIG. 1 1,121