RU2356663C1 - Casting-rolling aggregate - Google Patents

Abstract

FIELD: metallurgy.

SUBSTANCE: casting-rolling aggregate for manufacturing of profiled production contains located sequentially at the same axis continuous caster, flying shears, catching table with refrigerator and traversing gear of works, stove facility and rolling mill. Stove facility is outfitted by additional inter-furnace roller bed, which is connected with catching table of refrigerator by means of transversal transfer and feeding roller bed, axis of which coincide to axis of additional inter-furnace roller bed, and inside the furnace roller beds are connected to each other between facility for plane-parallel movement of heated blanks across-track direction, herewith before the inter-furnace roller beds there are located additional defining roller beds, length of which is not less than maximal length of inter-furnace roller bed.

EFFECT: invention provides receiving at the same aggregate of quality profiled product from common and alloyed steel grade, and also rolling of blanks from cold trading quarter.

1 dwg

Description

The invention relates to the field of metallurgy, and more particularly to the design of foundry-rolling units and complexes, and can be used to create new and reconstruction of existing foundry-rolling shops.

A known unit for the continuous casting and rolling of steel wire, which includes a continuous casting machine for steel billets, hydraulic shears, a stripping machine, an induction heater, a planetary rolling mill, a rolling mill consisting of horizontal and vertical roughing stands and a block of finishing stands (Journal of Heavy Engineering ", 1977, No. 5, p. 7, Fig. 5).

This unit, adopted as an analogue, has the following disadvantage: in case of temporary violation of the temperature regime of the casting, the unheated portion of the billet goes to the mill for rolling. If for low-carbon steel grades this does not matter much, then for an alloyed grade this can lead to marriage.

As a prototype of the claimed invention, a well-known foundry-rolling unit for the production of high-quality products is adopted, comprising a continuous billet continuous casting machine (CCM) sequentially located on one axis, flying scissors, a take-up roller table with a refrigerator containing a mechanism for transverse movement of cast billets, and a furnace device having an intra furnace roller table, whose axis coincides with the axis of casting, and located after the furnace device rolling mill (Academician A.I. Tselikov. "Essays, memoirs, selected articles. ”Moscow, Nauka, 2003, p. 174).

The disadvantage of the analogue in the prototype is partially eliminated, since in this casting and rolling complex a section of a workpiece with temperature deviations from a predetermined technology is cut on flying scissors. The disadvantage of the prototype is that the cut billet must be reheated before further rolling, spending additional heat on it.

The aim of the invention is the expansion of technological capabilities by ensuring the receipt on one unit of high-quality long products from both conventional and alloyed steel grades, as well as by providing the possibility of rolling billets from a cold embankment.

The technical effect of the claimed invention consists in the ability to provide the necessary rolling temperature conditions both in the processing of ordinary steels and in the processing of high-quality steels and billets from a cold embankment.

The task with the achievement of the indicated technical effect is ensured by the claimed invention in that a casting and rolling unit for the production of high-quality products, comprising continuous billet continuous casting machine (CCM) sequentially located on one axis, flying shears, a receiving roller table with a refrigerator containing a mechanism for transverse movement of cast billets a furnace device having an intra-furnace roller table, the axis of which coincides with the casting axis, and a rolling mill located after the furnace device, and there is a furnace device equipped with an additional intra-furnace roller table, the axis of which is offset from the axis of the first intra-furnace roller table in the direction opposite to the direction of motion of the cast billets along the refrigerator, while the additional internal furnace table is connected to the receiving roller table of the refrigerator by means of a transverse slapper and a feeding roller whose axis coincides with the axis additional intra-roller table, and the intra-roller table are connected by a device for plane-parallel movement of n heated blanks in the transverse direction. In addition, in front of the intra-furnace roller tables, additional master roller tables are placed no less than the maximum length of the intra-roller tables.

The invention is shown in the drawing.

The casting and rolling unit for the production of high-quality products contains a continuous billet casting machine (CCM) 1, flying scissors 2, a take-up roller 3, a refrigerator 4 connected to a refrigerator containing a mechanism 5 for transverse movement of the billets, a furnace device 6 having an furnace roll table 7, an axis 8 of which coincides with the axis 9 of the continuous casting machine, and the rolling mill 10 located after the furnace device.

The furnace device 6 is equipped with an additional intra-furnace roller table 11, the axis of which 12 is offset from the axis 8 of the first intra-roller table 7 in the direction opposite to the direction of movement of the cast billets in the refrigerator 4. In this case, the additional intra-furnace table roller 11 is connected to the receiving roller table 3 of the refrigerator 4 by means of a transverse splinter 13 and the feed roller table 14, the axis 15 of which coincides with the axis 12 of the additional intra-furnace roller table 11, and the intra-furnace roller tables 7 and 11 are interconnected by a plane-parallel device 16 moving heated workpieces in the transverse direction. In front of the intra-roller conveyors 7 and 11, additional master conveyors 18 and 19, respectively, are located.

Behind the rolling mill 10, a refrigerator is installed (not shown in the drawing) for cooling the finished product.

Casting and rolling unit for the production of varietal products is as follows.

The initial position of the machines and devices of the unit: in the continuous casting machine 1 seed was introduced, a casting ladle with liquid steel was installed on the continuous casting platform, the flying scissors 2 are in the initial (leftmost) position, the rolls of the rolling mill 10 are configured to roll a given rolling standard size.

Steel casting begins, as the seed is advanced. When approaching the casting workpiece to the scissors 2, the latter begin to move along the casting line with the speed of the workpiece, while cutting off its front end. After the end of the segments of the front end of the workpiece, the scissors 2 (the position of the scissors at this moment is shown in the drawing by dashed lines) return to their original (leftmost) position.

The front end of the workpiece advances along the take-up roller table 3, reaches the furnace device 6 and moves along the intra-furnace roller table 7.

During the time the billet is in the working space of the furnace device 6, the cured surface layers of the cast billet are heated, which contributes to a more stable rolling process on the mill 10.

This combined process of casting and rolling is used in the production of grades from ordinary, low-carbon steel grades. For alloyed steel grades, a more uniform temperature distribution over the billet cross section is required, which requires a longer stay of the billet in the furnace device 6. Therefore, for alloyed steel grades, the process flow in the casting and rolling unit changes its direction.

In particular, after the length of the workpiece passing through the scissors 2 becomes, for example, equal to the length L of the furnace device 6, the scissors 2 are again turned on and cut off the workpiece of measured length. In the process of its movement, the workpiece reaches the receiving roller table 3. Further, the workpiece has two paths: if the workpiece for some reason should be removed from rolling, then the mechanism 5 for the transverse movement of the cast workpieces is transferred to the refrigerator. To ensure high-temperature rolling, or when rolling workpieces from a cold suburb, the workpiece with a slapper 13 is moved to the feed roller 14.

The feed roller 14 it is transferred to the furnace device 6 to an additional intra-furnace roller table 11. Device 16 for plane-parallel movement of the workpieces they are moved across the furnace space in the transverse direction. In the process of moving the temperature is equalized over the cross section of the workpiece.

The workpiece that has reached the first intra-roller table 7 is set with this roller table to the rolling mill 10, at the output of which high-quality products of the required nomenclature are obtained.

The inventive casting and rolling unit for the production of high-quality products allows you to:

- for low-carbon steel grades in this casting and rolling unit, a combined casting and rolling process with the passage of a continuous billet along the furnace device without cutting it into multiple lengths is unnecessary;

- for alloyed steel grades requiring better heating, or when rolling workpieces from a cold embankment, it is possible to move the workpiece cut into pieces across the furnace space; the residence time of the workpiece in the furnace space increases, in this case, no less than an order of magnitude;

- when processing a low-carbon steel grade, a case is possible when an abnormal situation arises in a section of a rolling mill (for example, a peal between the stands “drilled”). In this case, the workpiece to be poured begins to be cut with scissors 2 into measured lengths and, using the slapper 13 and the feeding roller table 14, pieces are loaded into the furnace device 6 to the additional intra-furnace roller table 11 and, further, according to the already described process;

- the presence of the technological chain, including a refrigerator 4, a receiving roller 3, a hopper 13, a feeding roller 14 and an additional intra-roller roller 11, allows cold workpieces that have undergone surface cleaning to be loaded into a casting and rolling unit.

In an emergency, when an unheated billet is detected on the roller table 7 or 17, it is sent along the roller table 7 to an additional roller table 18, where it awaits its turn in order to wedge between the workpieces coming from scissors 2, which is why the roller tables 18 and 19 are of length no less than the length of the intra-live rolls. The billet moves further along the same route: the roller table 3, the hopper 13, the roller table 14, the roller table 19, the roller table 11, the device 16, the roller table 7, then the billet (after reheating) is set in the rolling mill.

Claims (1)

A casting and rolling unit for the production of high-quality products, comprising continuous billet continuous casting machines, flying scissors, a receiving roller table with a refrigerator and a mechanism for transverse movement of cast billets, a furnace device with an intra-furnace roller table, the axis of which coincides with the casting axis, and located after furnace device rolling mill, characterized in that the furnace device is equipped with an additional intra-furnace roller table, the axis of which is offset from the axis of the first the intra-roller table in the direction opposite to the direction of movement of the cast billets along the refrigerator, while the additional intra-roller table is connected to the receiving roller table of the refrigerator by means of a transverse slapper and a feeding roller table, the axis of which coincides with the axis of the additional intra-furnace table table, and the intra-roller tables are connected by means of a device for plane-parallel movement heated workpieces in the transverse direction, and in front of the furnace rods are additional ln master rolling tables, the length of which is not less than the maximum length of the furnace rollers.