US3524495A - Roller zone in the system of secondary cooling in continuous casting plants - Google Patents

Description

Aug. 18, 1970 v, NISKOVSKIKH ETAL 3,524,495

ROLLER ZONE IN THE SYSTEM OF SECONDARY COOLING 1N CONTINUOUS CASTING PLANTS Filed March 1., 1967 3 Sheets-Sheet 2 Aug. 18, 1970 v, s bvs EI'AL 3,524,495

ROLLER ZONE IN THE SYSTEM OF SECONDARY COOLING 1N CONTINUOUS CASTING PLANTS Filed March 1, 1967 3 Sheets-Sheet 5 IIIIIIIIIIIIIIII United States Patent 3,524,495 ROLLER ZONE IN THE SYSTEM OF SECONDARY COOLING IN CONTINUOUS CASTING PLANTS Vitaly Maximovich Niskovskikh, Ul. Festivalnaya, 21, kv. 60; Evgeny Jukhimovich .Gelfenbein, U]. 40 let Oktyabrya, 28, kv. 51; Viktor Fedorovich Dyshkant, Ul. Kalinina, 56, kv. and Georgy Lukich Khimich, Ul. L'eniua, 53, kv. 92, all of Sverdlovsk, U.S.S.R.; and Alexei Ivanovich Varaxin, Ul. Dybenko, 22, korp. 5 kv. 374, Moscow, U.S.S.R.

Filed Mar. 1, 1967, Ser. No. 619,815 Int. Cl. B22d 11/12 US. Cl. 164-282 1 Claim ABSTRACT OF THE DISCLOSURE A roller stand for use in the secondary cooling zone of a continuous casting machine, especially where a curved mold is; used, and in which a plurality of rollers are disposed in a curve to receive andwithdraw a solidifying ingot from the mold, the stand being provided with two lower rollers arranged parallel to each other, adjustable to accommodate the curved ingot, and mounted in lower pads, and two upper rollers arranged parallel to each other in upper pads, connecting rod means pulling the upper roller pads toward said lower rollers, and guides on said lower pads to engage said upper pads and said connecting rod means to assure correct alignment between the upper and lower rollers.

The present invention relates to continuous casting plants equipped with a curved mold, and more particularly to the roller zone of a system of secondary cooling in such plants.

Known in the prior art are roller zones of a system of secondary cooling in continuous casting plants equipped with acurved mold, which zones comprise two rows of rollers, each of which is adjusted along a curve by means of an individual drive, for example, a hydraulic cylinder. (See the journal, Jernkontorets Annaler, vol. 147, 1963, No. 8.)

Such a roller zone is complicated in its design, while the presence of the individual drive interferes with the free access to the roller zone during the operation thereof.

In the existing roller zone, when it is employed in plants for casting ingots of large cross-sectional size, the individual drive has large dimensions, which results in an increase of pitch between the rollers, and hence in a deterioration of the quality of an ingot being cast.

An object of the present invention is to provide a roller zone of the system of secondary cooling which is simple in design and convenient in operation.

An important object of the present invention is to provide a roller zone of the system of secondary cooling that improves the quality of the ingot being cast.

These and other objects of the present invention are achieved due to the fact that in the roller zone of the system of secondary cooling comprising two rows of rollers arranged along a curve, the rollers are united into sections or stands each of which comprises two rollers of the lower row and two rollers of the upper row, provided in pairs in interconnected pads constructed to absorb the forces resulting from a crystallizing (solidifying) ingot passing between the rows of the rollers.

It is expedient that the connection of the pads of the upper rollers to the pads of the lower rollers is effected by means of connecting rods fixed in guides in the pads of the lower rollers.

The roller zone may be provided with a cross piece interconnecting the pads of the upper rollers and made as a jacket.

ice j The nature of the present invention will become more fully apparent from a consideration of the following description of an exemplary embodiment thereof, taken in conjunction with the accompanying drawings, in which:

FIG. 1 represents an area of the roller zone according to the present invention;

FIG. 2 is a cross-sectional view taken along the lin IIII of FIG. 1;

FIG. 3 is a cross-sectional view taken along the line IIIIII of FIG. 1;

FIG. 4 is a crosssectional view taken along the line IVIV of FIG. 1;

Let us consider an exemplary embodiment of one section or stand of the roller zone of the system of secondary cooling.

This section comprises two rollers 1 (FIG. 1) of the upper row and two rollers 2 of the lower row that are provided in pairs in pads 3 and 4.

The pads are interconnected by means of connecting rods 5 that absorb the stresses resulting from the rolling engagement of the rollers on the ingot 6, passing between the upper and lower rows of the rollers 1 and 2. The upper portions of the connecting rods 5 are provided with guides 7 in contact with the surfaces B of a projection 8 of the pads 4 and surfaces A of the upper pads 3. The lower portions of the connecting rods 5 are guided by the surfaces A and B of pad 4, which results in the connecting rods 5 being fixed for guidance by these pads.

The pads 4 of the lower row of the rollers 2 are sta tionary being secured on a frame 9. Linings 10 and cylindrical sliding blocks 11 are provided for setting the section of the rollers 1 and 2 at the required angle when adjusting the rollers 2 of the lower row to any curve.

The pads 3 of the upper row of the rollers are secured to connecting rods 5 by pins 12 (FIG. 2).

For setting the distance between the rollers 1 of the upper row and the rollers 2 of the lower row in the pads 4, worm reduction gear nuts 13 (FIG. 3) are provided that cooperate with pressure screws 14 which are connected through cross pieces 15 to the connecting rods 5.

For selecting gaps in the junctions, as well as for facilitating the rapid assembling and disassembling of the pad 3 and rollers 1 with the pads 4 of the lower row of rollers 2, hydraulic cylinders 16 thrusting with its plungers 17 into the pads 3 of the upper row of the rollers 1 are provided.

For cooling the ingot 6 passing between the rollers 1 and 2, sprayers 18 are provided. To improve the conditions of the cooling process, the rollers 1 and 2 are provided with axial channels 19 and 20 to allow a cooling liquid to pass therethrough, the cooling liquid being supplied through pipes 21 and 22 and drained in the direction shows in the drawings by an arrow C.

The pads 3 of the upper row 1 in each stand are interconnected by a cross piece 23, functioning as a jacket which is intended for catching vapors that evolve during the cooling process.

The rollers 2 of the lower row are driven by an electric motor 24 (FIG. 4) via a reduction gear 25.

The roller zone of the system of secondary cooling is composed of a plurality of sections or stands, one of which is considered above. The presence of such sections allows the rollers 1 and 2 to be disposed along any specified curve, providing for best conditions of straightening the ingot. The adjustment to any specified curve is effected by replacing the linings 10.

In a case where the thickness of the ingot 6 being cast is likely to vary, the rollers of the upper and lower rows are adjusted to this thickness by worm reduction gear nuts 13 and pressure screws 14.

Such a design of the roller zone simplifies the design. M .References .Cited a is f ffiz if e g 1 g 2,673,480 3/1954 Wellrnan 72 z4s 1. A roller stand having a curved roller path for use 8/1966 et in a system of secondary cooling in continuous casting 5 3286495 11/1966 Dlolot 22-248 plants of the type having a curved mold, and two rows of 3347308 10/1967 saPnders rollers respectively arranged above and below said curved 3,426,835 2/1969 Mlchelson 164-274 path adaptid to nipve a crylstallizing ingot; said stand FO IG PATENTS consisting 0 two ro ers in sai upper row an two ro ers of said lower row, the ends of which are respectively 10 g g g mounted m an upper and lower pad; and means intercon- 874,036 8/1961 Great Britain.

necting the adjacent upper and lower pads to absorb the forces resulting from the crystallizing ingot; said means L SPENCER OVERHOLSER Primary Examiner including connecting rods to connect the pads of the 15 upper pair of rollers to the pads of the lower pair of s-ANNEAKAsslstant EXamlIlel' rollers; and guides being provided in said pads of the lower pair of rollers for guiding said connecting rods in CL D linear movement. 72 248

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