JPS6125459B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a slab dividing method and apparatus.

Recently, slabs produced by continuous casting equipment, blooming equipment, etc. are often cut in the longitudinal direction and separated in the width direction. For example, when producing a slab with a small width, if the slab is produced according to the width using continuous casting or a small ingot mold,
Productivity decreases and it is not economical, so 2 of the planned width
A double-width slab is produced using continuous casting or a large ingot mold, and this double-width slab is longitudinally divided into two by gas cutting to create a slab of the planned width.

However, this dividing work involves moving the slab to another location and then using a gas cutting machine there, which requires transporting the slab.

In addition, slag (also called sag) from the cutting adheres to the bottom surface of the gas-cut slab, and this slag gets caught in the slab during rolling, leaving permanent scratches, so it was necessary to remove it before rolling.

In order to remove this slab, the actual situation is that conventionally the slab is turned over and removed manually.

The present invention was developed by paying attention to these points. For example, without transporting a double-width slab from a continuous casting facility to another location, the present invention can be transferred to a series of transport tables by the rollers of the transport table. For example, move the gas cutting machine without damaging the
We propose a slab dividing method and apparatus that divides the slab into two parts and automatically removes slag or sag generated during the cutting downstream of the slag flow.

The present invention will be explained in detail below.

Note that FIG. 1 is a front view of an example of an apparatus for carrying out the present invention, FIG. 2 is a plan view thereof, and FIG.
In the figures, a, b, c, d, e, and f are explanatory diagrams showing each step when dividing a slab by the method of the present invention.

First, in FIGS. 1 and 2, reference numeral 2 indicates slab conveyance rollers. These rollers 2 are installed at equal intervals in the width direction of the slab 1 at a horizontal level, and these rollers 2 constitute a slab conveyance table. The slab 1 from the continuous casting equipment is transported in the direction of arrow A by each roller 2 of the transport table. A pair of lifting beams 3 and 3' are provided below the roller 2 and parallel to the conveying direction of the slab,
Support beams 3a, 3a' are vertically provided above each lifting beam 3, 3' at intervals, and these support beams 3a, 3a' are arranged at positions between each roller 2.

Further, each of the lifting beams 3, 3' is configured to be able to rise and fall freely, and for this purpose, each rod 5,
Join 5'. Therefore, each lifting beam 3, 3' and support beam 3a, 3a' is connected to a lifting cylinder 4,
4', and in particular, when the slab 1 is sent by the conveying table, the slab 1 is supported by each support beam 3a, 3a' and then rises to the dotted line position, and the slab is It rises from the solid line position to the dotted line position.

Next, support frames 7a and 7a' are provided at the raised position where the slab 1 is raised, and these support frames 7a and 7a' are respectively provided.
A pair of rails 7, 7' are provided on the upper surface of 7a', and a gas cutting machine 6 is installed along these rails 7, 7'.
be placed so that they can be freely runnable. A movable table 9 is provided to be movable in the lateral direction with respect to the gas cutting machine 6, and a blowpipe nozzle 8 for gas cutting is provided at the tip of the movable table 9.
Further, a guide roller 10 is provided so as to be guided by coming into contact with one side edge of the slab 1a or 1, and this guide roller 10 is connected to a sliding table 12 via an arm 11. This sliding table 12 engages a connecting rod 14, and one end of the connecting rod 14 is connected to an air cylinder 13. Therefore, as described later, during gas melting, the guide roller 10 is connected to the air cylinder 1.
3, the gas cutter 6 moves in the direction of arrow A (see FIG. 1) and cuts the slab 1 in the longitudinal direction along the cutting fluid 1b. Note that the connecting rod 14 also engages with the moving table 9.

Further, reference numeral 15 indicates a fusing nozzle for removing slag. The carriage 17 is supported on the pedestal 16 so as to be freely movable.

Next, when dividing a slab by the dividing apparatus according to the present invention having the above-mentioned configuration, FIG.
Divide as shown in c, d, e and f.

First, it is assumed that a double-width slab is manufactured by continuous casting or the like, and this slab 1 is conveyed onto rollers 2 of a conveyance table, where the feeding of the slab 1 is temporarily stopped (see FIG. 3a). After stopping, each support beam 3, 3' is raised together with the lifting beams 3a, 3a' by the lifting cylinders 4, 4' and the rods 5, 5', and the slab 1 is raised to the cutting height, as shown in FIG. 3b. It is held as shown in . continue,
The gas cutting machine 6 runs along the guide rails 7, 7' and divides the slab 1 in the longitudinal direction by the blowpipe nozzle 8 provided on the movable table 9 of the gas cutting machine 6. The crater 8 uses a guide roller 10 for slab surface measurement set at a position 1/2 the width of the slab from the cutting position. That is, while the guide roller 10 is pressed against one side of the slab 1 by the pressure of the air cylinder 13 and the gas cutter 6 moves the rails 7 and 7' in the direction of the arrow, the gas is cut from the blowpipe nozzle 8. A gas cutting flame is ejected to divide the slab 1 into two along the fusing line 1b (see FIG. 3c). By cutting in this manner, since the slab 1 is lifted from the roller 2, the roller 2 is not damaged by the gas cutting flame.

In addition, if the distance between the blowpipe tip 8 and the guide roller 10 is initially set to, for example, 1/2 the width of the slab, the guide roller 10 can be pressed by the pressure of the air cylinder 13 to prevent undulations of the slab. Therefore, the guide roller 1 is placed in the direction perpendicular to the guide rail direction.
Gas cutting can always be performed to 1/2 width even if the 0 moves.

Subsequently, after the slab division is completed, one of the two cut slabs 1', 1'', for example, the divided slab 1' on the near side in FIG. 2, and only one support beam 3a in FIG. It is lowered by lowering as shown in d, and only the divided slab 1' is returned onto the roller 2 of the conveying table.

At this time, the other divided slab 1'' is held in the raised position by one of the lifting beams 3' and the supporting beams 3a'.

Also, when one of the divided slabs 1' is placed on the roller 2, the roller rotates, as shown in Figure 3e.
The slab moves in the direction of the arrow. In this case, the fusing slag adheres along the fusing surface of the divided slab 1', that is, along the lower part of the fusing line 1b, but during the movement of the divided slab, the fusing slag moves diagonally upward from below on the downstream side. When gas is injected from the cutting nozzle 15 to the lower part of the melting surface, the cutting slag 19 (see Figure 3 f) that remains continuously along the lower part of the melting surface is melted and blown away. .

At this time, the slab is temporarily stopped just before the cutting tip 15 for removing slag, and the cutting part at the tip is momentarily preheated, and then the roller is rotated and moved to remove the slag. . Further, each operation at the time of stopping and moving forward may be performed by signals from a timer, phototube, numerical control, etc.

Next, the lifting cylinder 4 and rod 5 on the other slab lifting device 3 are operated to lower the other divided slab 1'' onto the roller 2, and move it in the direction of the arrow in the same way as the slab 1', and lift the slag. (see Figure 3f).

Note that the fusing nozzle 15 for removing slag is for removing slag attached to the lower ends of both sides of the cut gas cut surface, so the fusing nozzle 15 can be moved to the left or right depending on whether it is slab 1' or slab 1''. It is necessary to move it slightly to set it.For this reason, the melting hole 15
It is preferable to provide a fine adjustment function for feeding between the centering cart 18 and the cart 17 to which the is fixed, by means of rail feeding, screw feeding, or the like.

As explained in detail above, the present invention involves lifting a double-width slab, for example, from a continuous casting facility onto the table roller while it is being conveyed, and keeping the slab stationary at this position. Run the gas cutting machine and divide it vertically. Therefore, it goes without saying that the transport rollers are not damaged, and the slab can be accurately divided into two parts, and the fused surfaces to be divided are always at a constant position, so that the slag attached to the divided slabs can be continuously removed. In addition, while only one of the divided slabs is lowered, returned to the original conveyance roller, and moved downstream, the slag attached to the lower part of the melted surface can be continuously melted away, and the Then, the other divided slab is returned onto the conveying roller of the conveying table and the adhered slag can be continuously removed while being similarly moved to the downstream side.Furthermore, each divided slab can be continuously sent to subsequent processing. can. Therefore, compared to the conventional method, the productivity is extremely high, and since width division and slag removal can be performed in the same place, the productivity is further improved.

[Brief explanation of the drawing]

FIG. 1 is a front view of an example of an apparatus for carrying out the present invention, FIG. 2 is a plan view thereof, and FIG. Therefore, it is an explanatory view showing each process in the case of dividing a slab. Code, 1... Slab, 1', 1''... Divided slab, 2... Roller, 3, 3'... Lifting beam,
4, 4'... Lifting cylinder, 5, 5'... Each rod, 6... Gas cutter, 7, 7'... A pair of rails, 8... Blowpipe mouthpiece, 9... Moving table, 10... Guide roller, 11...arm, 12...sliding base,
13...Air cylinder, 14...Connection rod, 1
5... Cutting crater, 16... Frame, 17... Trolley,
18... Aligning trolley, 19... Slag.

Claims (1)

[Claims] 1. After a slab conveyed from continuous casting equipment is temporarily stopped on a roller, this slab is lifted onto the roller, and thereafter, the slab is kept stationary at the elevated position above the roller. The gas cutting machine is moved to divide the slab in the longitudinal direction by gas cutting, and then only one of the divided slabs is lowered and returned onto the roller, and the slab is moved downstream by the roller. The lower part of the gas-fused cross section of one of the moving slabs is exposed to the cutting gas from the cutting nozzle, and the melt-cutting slag adhering to the lower part is continuously removed by cutting. The divided slabs are lowered and returned onto the rollers, and moved downstream by the rollers, and during this movement, the welded slabs adhering to the lower part of the gas melting section of the other divided slab are melted in the same way as the one divided slab. A slab dividing method characterized by cutting and removing. 2 A pair of lifting beams are provided below the rollers of the slab conveying table along the slab conveying direction, and support beams are installed on each of these lifting beams so as to be located between the rollers. The roller is configured to be movable up and down together with the beam, and a gas cutter is provided above the roller to move along the slab conveyance direction and vertically divide the slab raised by the support beam by gas cutting; While one of the divided slabs is lowered by the support beam and returned onto the roller, the one divided slab is placed at a position where cutting gas can be injected to the lower part of the melted surface of the one divided slab. A slab dividing device comprising a slab removing device that removes adhered slabs by blowing gas.