SU839623A1 - Combined bar rolling mill - Google Patents

Description

one

The invention relates to the processing of metals by pressure and can be used in the design and reconstruction of rolling mills.

A rolling mill is known for producing fine grades and wire rod containing two heating and electric preheating furnaces. Crimping cage trio set between them. There are blackened, intermediate and clean stands of the stands in the process flow; Winders are located at the end of the technological mill, mill aggregates are connected by devices for transporting roll C1}.

A disadvantage of the known rolling mill is its considerable extent caused by the irrational arrangement of the equipment, in addition, an electric heating furnace installed between the crimping stand and the roughing stand group increases the length of the mill by more than 16 m. Scissors for cutting the roll installed after the crimping stand , also increase the stanza of the camp.

Known combined section rolling mill, containing loading grilles, furnaces for heating the billet and preheating the roll, crimping stand, scissors, blocks of stands for rolling the grade and rod, device

for transporting blanks and

roll, winder and the section for finishing the rolled stock, and intended for simultaneous and independent rolling of profiles in three schemes, ensuring that profiles of large sections, simple varietal profiles of small sections and wire rod are obtained 2.

A disadvantage of the known combined rolling mill is the irrational arrangement of heating devices. Thus, one of the heating furnaces is located in the head section, and the other in the tail section of the pack, which increases the size of the mill and extends the communications of the power supply to the heating devices, increasing the cost of building the mill. In addition, the separate arrangement of heating devices leads to an increase in the service staff, and the traditional arrangement of scissors for cutting the roll out of the crimping stand also leads to an increase in the length of the mill.

The purpose of the invention is to reduce the mill's length and the rational arrangement of equipment.

The goal is achieved by the fact that, in a combined rolling mill, the heating and heating furnaces are installed behind the crimping stand on both sides of the rolling roller table, to which their windows face, transporting devices serving the kilns and the crimping stand, form a double ring system, and scissors for cutting the roll are installed in front of crimping stand.

Figure 1 schematically presents a combined rolling mill, figure 2 - section of furnaces and crimp section of the mill.

The rolling mill contains loading grids 1, a shlepper 2. and a live rolls .3 for supplying blanks to a heating furnace 4, a rolling rolls 5, a crimping stand 6, a scissors 7 for cutting the roll, a packing roller 8, a shlepper 9 and a roll table 10 for feeding the roll to the heating furnace 11, a block of stands 12 for rolling large and medium grades, a finishing section 13 for rolling, a block of stands for rolling fine and a rod of a winder 15. The heating 11 and heating 4 furnaces are installed behind the crimping stand on both sides of the roll table 5. Furnace windows 4 and 11 for issuing heated and heated blanks facing the roll conveyor 5.

The devices transporting the workpieces and rolls to the furnaces, as well as installed in the furnaces themselves, form a two-ring system, which is indicated by arrows (Fig.2).

The two-ring system contains conveying devices for re-. giving billets to a heating furnace {Schlepper 2, live rolls 3, transporting device 4) and feeding the roll (roll rolling 5, palletizing live rolls 8, shlepper 9, live rolls 10 and transporting device of the furnace 11). The two ring conveying systems are combined by means of a roll conveyor 5.

Scissors 7, serving to cut the roll, obtained in the pressing stand, are located in front of the pressing stand 6.

KS mixed varietal rolled ytan works as follows.

The blanks (blooms) are fed to the loading grid 1 and then, with the help of a spindle 2 and a roller table 3, are loaded into a heating furnace 4.

After heating up to the rolling temperature, the blanks are fed to the rolling roller table 5 of the reversing reel stand duo 6.

After a billet has been obtained in the pressing stand for rolling large and medium grade profiles, it is conveyed along the roll stand of the rolling stand to the block of stands 12 for rolling large and medium grade. The finished profiles arrive at the finishing area 13.

In the case of rolling small grades, the billet rolled to the required size in the pressing stand is transferred to the block of stands 14.

If the billet is strongly cooled during rolling in the mill stand or it is intended for the production of wire rod, it is cut with flying shears 7, harvested on the baling roll bis with the help of a cleaver 9 and the conveyor bar 10 is sent to the preheating furnace 11. the roller table of the pressing stand 5 is sent to the block of stands 14 and then the finished steel is transferred to the winder 15.

In case of emergencies, such as the failure of one of the furnaces, the Double-Ring Transport System allows for the transfer of metal from one furnace to another and to ensure its use.

In the proposed combined rolling mill, the installation of the heating and heating furnaces behind the crimping stand on both sides of the roll table significantly reduces the length of the mill.

For example, on a mill with a capacity of 500 thousand tons of rolled metal per year using blooms 125 125 mm, a roll of 60x60 mm and a length of 12 m is rolled for the wire section in the pressing stand. In this case, the length of the preheating furnace is 17 m. to the furnace of roller tables and loading devices of 15 m. Therefore, at the location of the equipment according to the scheme of the proposed combined section rolling mill, it is possible to reduce the length of the rolling mill, 32. m

The combined rolling mill has several production lines, for example for large, medium and fine grades, and is located in several spans. In connection with this, an unused area is formed in the head section of the mill in the area of the stand mill. The location of the preheating furnace and the transport facilities for its maintenance on it contributes to a better utilization of the building's production area.

Claims (2)

The most compact arrangement of the transport devices is obtained when the shlepper 9 is installed against the baling roller table 8 of the pressing stand, and the length of the roller tables 3 and 10 transporting the blanks to the furnaces is the smallest. A reduction in the length of the roller tables is achieved by installing a flying scissors 7 in front of the crimping glue 6. In this case, the installation of a special roller table in front of the scissors is no longer necessary. Flying shears are installed directly in front of the rolling table of the crimping stand, which reduces the mill's length by at least another 14 meters. Claims of the invention Combined section rolling mill containing loading grids, furnaces for heating the blanks and preheating the sheet, crimping stand,; scissors, blocks rolling mill stands and wire rods, a device for transporting billets and rolls, a winder and a rolling finishing area. characterized in that in order to reduce the length of the mill and the rational arrangement of the equipment, the heating and preheating furnaces are installed behind the crimping stand on both sides of the roll table, which their output windows face, transporting devices serving the kilns and the crimping stand, form a two-ring system, and shears for cutting the roll installed in front of the crimping stand. Sources of information taken into account in the examination 1.Vastovsky VG Directory of rental. M., Metallurgists, 1972, p. 165. 2. Author's certificate CQCP 298389, cl. B 21 B 1/16, 1968. FIG. 2 eleven T t