RU14877U1 - UNIT OF LATERAL CUTTING OF SLABS - Google Patents

Description

Object - Utility Model

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Slitting Unit

The utility model relates to metallurgy and is intended for the longitudinal cutting of continuous casting slabs having a temperature above 800

A gas cutting machine is known, consisting of two slitting lines on which slabs that are already transversely cut are cut. On each gas cutting line, there are two gas cutting machines installed on the overpass, which cut towards each other and divide the slabs installed in a certain place along. The cutting lines are equipped with devices for determining the dimensions of the slab and its position on the rolling table. For this, infrared sensors and devices for determining the path and instantaneous position of the machine are installed. Gas cutters are placed on the consoles, each of which is made with the possibility of fixing at the same distance relative to the guide rail. Each gas cutter has a built-in fuse for long burning, which is manually ignited before starting work. The cutting speed is also manually set on the control panel located on the overpass above the roller tables, depending on the thickness of the slab, its quality and temperature (see Ferrous metals, 1981, JVb23, p. 32-43).

A disadvantage of the known gas cutting machine is that it cannot be installed in a slab continuous casting machine line.

Closest to the proposed design in technical essence is the installation for the longitudinal cutting of continuously cast slabs, which includes four units for cutting. The slab slitting machine consists of a roller table, on both sides of which there are rail guides for moving two portal machines towards each other of the MPK V23K31 / 10 slabs

to a friend. On each portal there is a carriage with an oxy-fuel burner. The installation is equipped with transport trolleys for feeding and harvesting slabs and a trolley for piece layouts with a lifting device and a slapper. To orient the slab on the rack before cutting, the unit is equipped with a centering device, and for tincture to a given cutting width, it is equipped with an electromechanical drive with pressure screws, which are driven from a common shaft through three worm gearboxes. The rack is equipped with hydraulic cylinders for clamping the slab (see Ferrous metals, 1981, No. 1, p. 3-12),

A disadvantage of the known design of the slab slitting machine is that it cannot be installed in the production line directly behind the continuous casting machine, since slabs are cut when laying the slab on the fixed beams of the rack.

The problem to which the proposed utility model is directed is to provide the possibility of slitting slabs directly behind the continuous casting machine or immediately behind the transverse cutting unit.

The technical result achieved by the proposed utility model is to increase the speed of slitting slitting by maintaining the high temperature of the hot cast billets.

According to the statement, the technical result is achieved by the fact that the overpass of the known slab slitting machine containing gas cutting machines with vertical cutters is located directly above the live rolls of the production line of the multi-strand continuous casting machine, the roller tables for each stream are made of cantilever rollers equipped with centering devices for centering the slab along axis of the stream. In front of the vertical cutter of each machine, one additional cutter is installed at an angle to the horizontal to the cut side, and another additional cutter is stationary mounted at an angle to the slab exit frame with cantilever rollers at the exit of the slab from the cutting zone

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horizontally at the lower surface of the cut slab along the cut line. In addition, each slitting machine is equipped with a console with a centering roller mounted on it to ensure parallelism of the longitudinal cut of the side face of the slab.

The essence of the utility model is illustrated by drawings, where in FIG. 1 is a cross-sectional view of an assembly; FIG. 2 is a view of an aggregate along a slab cut line in one gas cutting machine, FIG. 3 - transverse section of the unit along one of the streams of the continuous casting machine.

The slab slitting unit comprises gas cutting machines 2 with vertical cutters 3 installed on a ramp 1 (Fig. 1). An overpass 1 is placed directly above the rolling tables 4 of the production line of a continuous casting machine. Roller 4 for each stream is made of cantilever rollers and is equipped at the edges with centralizers 5 to center the slab along the axis of the stream. To ensure parallelism of the longitudinal cut of the side face of the slab, each gas cutting machine 2 is equipped with a console 6 with a centering roller 7 mounted on it.

In front of the vertical cutter 3 (Fig. 2) of each gas cutting machine 2, an additional cutter 8 is installed at an angle to the horizontal towards the cut. On the frame 9 of the rolling table 4 with cantilever rollers, another additional cutter 10 is installed at an angle of 5-10 to the horizontal at the level of the lower surface of the cut slab in the cutting plane in the zone of exit of the slab from the cutting zone.

Under the roller table 4 (Fig. 1) of each stream of the continuous casting machine, a chute 11 is equipped for granulation and removal of sludge.

The unit operates as follows.

Slitting is carried out directly in the stream of the production line of a multi-strand continuous casting machine. Cutter 8 (Fig. 2), located at an angle to the surface of the slab, gouging grooves of small width and depth, while removing scale from the cut line. Placed behind the cutter 8, the cutter 3 performs vertical cutting in this groove. With this arrangement of the main 3 and

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An additional 8 cutters cut the metal cleaned from scale inside the groove. In addition, the temperature of the planed groove is higher than the temperature on the whole slab as a whole, which allows to further increase the cutting speed. The slab is centered on the axis of the stream by centralizers 5 (Fig. 3), equipped along the edges of the rolling table 4 at the base of the cantilever rollers. The parallelism of the longitudinal cut of the side face of the slab is provided by the centering roller 7 mounted on the console 6 of the gas cutting machine 2.

The burrs (burrs) formed during cutting on the lower side of the trimmed edge of the slab are removed using a cutter 10 (Fig. 2) mounted at an angle to the bottom surface of the cut slab. The trimmed burrs and scale removed by the additionally installed cutters 8 and 10 are collected in the groove 11 (Fig. 1) and removed as sludge.

The proposed placement of the slab slitting machine in the production stream behind the continuous casting machine after transverse cutting will dispense with the equipment of transport and transfer roller tables, trolleys with lifting tables, special crane mechanisms, slappers and other equipment for transferring slabs from the continuous casting machine to the longitudinal unit cutting. In addition, with such an installation of the unit, longitudinal cutting of a hot slab is carried out at a temperature of 800-1000 ° C, which ensures maximum cutting speeds compared to cutting a cold slab. The increase in cutting speed in this case occurs twice. Therefore, the capacity of the unit installed in the production line of the continuous casting machine is two times higher than that of the unit located in a separate area.

The installation of an additional cutter for gouging along the groove line provides a higher temperature of the planed groove than the temperature on the whole slab as a whole, which allows to further increase the cutting speed, bringing it to the maximum for each thickness of the slab.

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The installation of a second additional cutter along the cut line to meet him at the level of the lower surface of the cut slab ensures the removal of burrs (burrs) formed on the lower lateral edge, which improves the quality of the finished rolling products.

Claims (1)

Slab slitting unit containing gas cutting machines with vertical cutters mounted on a flyover, characterized in that the flyover is located directly above the live rolls of the production line of the continuous casting machine, the live rolls for each machine stream are made of cantilever rollers equipped with centering units to center the slab along the axis stream, in front of the vertical cutter of each machine at an angle of 10-25 ^o to the horizontal in the direction of the cut, one additional cutter is installed, and on the roller table frame with a console other rollers are permanently installed at the exit point of the slab from the cutting zone at an angle of 5-10 ^° to the horizontal at the level of the lower surface of the cut slab along the cutting line, in addition, each gas cutting machine is equipped with a console with a centering roller mounted on it.