JPS5868458A - Method and device for dividing of slab - Google Patents

Abstract

PURPOSE:To produce divided slabs efficiently by stopping the slab under conveying once, cutting the slab by gases while holding the same lifted from conveying rolls, returning the slabs again onto the rolls and scarfing the slag formed by melt cutting while conveying the slabs again. CONSTITUTION:A slab 1a which is conveyed in an arrow direction A on rolls 2 is stopped once in a cutting position, where the slab is lifted to the position of a slab 1 by upward and downward moving devices 3, 3' operated by upward and downward moving cylinders 4, 4', rods 5, 5', etc. A gas cutter 6 traveling on rails 6 in parallel with the slab 1 is moved while guide rolls 10 are brought into abutment on the side edges of the slab 1 and the slab 1 is cut longitudinally by a nozzle 8 for gas cutting. The divided slabs 1 are returned to the position of the slab 1a on the rolls 2 by the devices 3, 3' and while the slabs are conveyed to the down stream side in the direction A, the slag formed during melt cutting is scarfed away by a scarfing nozzle 15 provided on the self-aligning carriage 18 on a carriage 17 which travels freely on a stand 16.

Description

[Detailed description of the invention] The present invention relates to a slab dividing method and apparatus.

Recently, slabs produced in continuous casting equipment, blooming equipment, etc. are often cut in the longitudinal direction and divided into widthwise parts. For example, when producing slabs of small width,
Slabs are produced by continuous casting according to the width or by using an ingot mold produced using a small ingot mold, and this double width slab is divided into two by gas cutting in the longitudinal direction to create a slab of the planned width.

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

In addition, slag (also called sag) from cutting adheres to the bottom surface of the gas-cut slab, and this slag bites into the slab during rolling and leaves 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 by one person.

The present invention was established by focusing on these points,
For example, there is no need to transport double-width slabs from continuous casting equipment to other locations.

The gas cutting machine is moved on a series of conveyance tables without damaging the rollers of the conveyance table, and the slag or sag generated during cutting is automatically removed downstream of the slag flow. We propose a slab dividing method and an apparatus for the same.

That is, one method of the present invention is to stop the conveyed slab on a roller, raise the slab from the roller at this point, and then divide the slab in the longitudinal direction by gas cutting at the raised position, and then.

The divided slabs are sequentially returned onto the rollers and, while being moved downstream 9111, the adhered slag and solvent at the lower end of the slab gas melting surface are removed.

Furthermore, the apparatus according to the present invention includes a slab elevating device provided in the middle of a conveying device having rollers used for conveying the slab, and a slab elevating device that vertically lifts the slab when the slab is lifted. It comprises a gas cutting device that divides the slab by gas cutting, and a slag removal device that is installed on the downstream side when moving the divided slab to the downstream side and removes the slag and solvent generated during the gas cutting. It is characterized by

The present invention will be explained in detail below.

Note that FIG. 1 is a front view of an example of an apparatus for implementing the present invention, FIG. 2 is a plan view thereof, and FIG. 3 is a fin,
Tb), (e), (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 numerals 2 indicate rollers, and these rollers 2 are installed at nine equal intervals in the horizontal direction, and these rollers 2 constitute a conveyance table. On each roller 2 of the transport table, a slab 1a is transported from the direction of the arrow, and this slab 1a is supported by a lifting device 3.3' and moved up and down. This slab lifting device 3.3'
is positioned on each rod 5, 5' of a plurality of lifting cylinders 4, 4', and the slab sent by the conveying table is raised from the state 1a to the state 1 by the slab lifting device 3.3'. be done.

Next, a pair of rails 7.7 are installed parallel to the slab 1a or 1.
', and a gas X-cutting machine 6 is movably disposed along these rails 7, 7'. A movable table 9 is provided so as to be movable laterally with respect to the gas cutting machine 6, and this movable table 9
A snowstorm crater 8 for gas cutting is provided at the tip. 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
is engaged with the connecting rod 14, and one end of the connecting rod 14 is connected to the air cylinder 13. Therefore, as will be described later, during gas cutting, the gas cutting machine 6 moves with the guide roller 10 pressed against the slab side @ by the air cylinder 13 to cut the slab. Note that the connecting rod 14 also engages with the moving table 9.

Further, reference numeral 15 indicates a solvent nozzle for removing slag, and this solvent nozzle 15 is provided on a centering cart 18 so as to be inclined upward, and this centering cart 18 is placed on a cart 17 for removing slag. This truck 17 is supported on a frame 16 so as to be freely movable.

Next, when a slab is divided by the dividing apparatus according to the present invention having the above configuration, the VC is shown in FIG. 3(a).

Divide as shown in (b), (c), (di, (e) and (f)).

First, it is assumed that a double-width slab is manufactured by continuous casting equipment, and this slab 1 is conveyed onto the roller 2 of the conveyance table, where the feeding of the slab 1 is temporarily stopped (the third
(See figure (a)). After stopping, the slab lifting device 3, 3' is raised by the lifting cylinder 4.4' and the rod 5.5', and the slab 1 is raised to the cutting height, as shown in FIG.
It is held as shown in b). Subsequently, the gas cutting machine 6 is run along the guide rail 7.7'.

Soft pipe crater 81C provided on the movable table 9 of the gas cutting machine 6
Therefore, slab 1 is divided into nine parts in the vertical direction.

At this time, the soft pipe nozzle 8 uses a guide roller 10 for the side surface of the slab, which is set at a position ten widths apart from the cutting position. That is, while pressing the guide roller 10 against one side of the slab 1 using the pressure of the air cylinder 13 and making it follow.

The gas cutting machine 6 moves the rails 7 and 7' in the direction of the arrow, and blows out gas cutting flame from the soft tube crater 8 to divide the slab into 1 ft 2 slabs along the fusing line 1b (see FIG. 3(e)).

This is because the slab 1 is lifted from the roller 2 when cut in this way.

The roller 2 is not damaged by the gas cutting flame.

In addition, if the interval between the soft pipe nozzle 8 and the guide roller 10 is initially set to 1, for example, ten widths of a slab, then if the guide roller 10 is pressed by the pressure of the air cylinder 13,
Even if the guide roller 10 moves in a direction perpendicular to the guide rail direction due to undulations of the slab, gas cutting can always be performed in ten widths.

Next, after the slab division is completed, slab 1 is cut into two parts.
．． 1'', one of the slabs, for example, the front divided slab 1' in FIG. 2, is lowered and returned onto the roller 2 of the conveyance table.

In this case, by operating the lifting cylinder 4' and rod 5' on one of the slab lifting devices 3, 3', the slab is lowered and returned to the roller 2, which is the single divided slab 1a (see FIG. 3(d)).

Furthermore, when one of the divided slabs 1a is placed on the roller 2, the roller rotates and the slab moves in the direction of the arrow as shown in Fig. 3(e), and on the downstream side of the slab movement, it diagonally moves from below. A solvent nozzle 15 for removing slag, which is installed facing upward, acts.

Even if slag 19 is continuously attached to the lower end of the gas cut surface in a line, this slag 19 is removed by using a solvent.

At this time, the slab is temporarily stopped just in front of the solvent nozzle 15 for removing the slab, the solvent portion at the tip is instantaneously 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'. (See FIG. 3(f)).

Incidentally, since the solvent nozzle 15 for removing the slab is for removing slag attached to the lower ends of both sides of the cut gas cut surface, the solvent nozzle 15 is used for removing the slag depending on whether it is slab 1', slab 1'' or K.
It is preferable to have a fine adjustment function for the feed by means of rail feed, screw feed, etc. to slightly move left and right.

As explained above in detail, one aspect of the present invention is to temporarily stop a double-width slab, for example, produced by continuous casting and being conveyed, on the rollers of a conveying table, and then lift it upward by a lifting device.

At this position, the slab is run along the side surface of the slab, and the slab is correctly divided into two parts using the soft tube tip of the gas cutting machine without damaging the roller. In addition, one of the divided slabs is lowered and returned to the starting position, and this slab is moved to the downstream gllll, and the slag removal device set on the downstream side of the slab attached to the lower end of the cut surface is removed. After removing the solvent, the other divided slab is returned to the rollers of the conveying table and similarly moved downstream to remove the slag attached to the lower end of the cut surface. .

Therefore, when the conventional method is used, the slab can be divided and the slag can be removed in one place, which greatly improves the production of slabs.

[Brief explanation of drawings]

FIG. 1 is a front view of an example of a device implementing the present invention,
Fig. 2 is a plan view thereof, and Fig. 3 is (a), (bl
, (cl, (d), (e), and ((f)) are explanatory diagrams showing each step of dividing a slab by the method of the present invention. Reference symbols 1, la, 1', -1 slab 1'' ......Slab 2...Roller 3.3'...Elevating device 4.4'-...Elevating cylinder 5.5'...Each rod 6 -...Gas cutting machine 7.7'-...Pair of rails 8...-Blizzard crater 9-...Moving platform 10...
...Guide roller 11...-Arm 12--Sliding stand 13.
... Air cylinder 14 ... Connection rod 15 ... Solvent nozzle 16 ... Frame 17
---Dolly Car 1g----Aligning dolly 19...
・・Slag

Claims (1)

[Claims] 1) The slab being conveyed is stopped on a roller, the slab is raised from the roller at this point, and then the slab is vertically divided by gas cutting at the raised position, and then these divisions are performed. 1. A method for dividing slabs, which comprises removing slag and solvent adhering to the lower end of the slab gas melting surface while sequentially moving the slabs to the downstream side as the rollers. 2) A slab elevating device provided in the middle of a conveying device equipped with rollers used to convey the slab, and a gas cutting device that divides the slab in the longitudinal direction by gas cutting when lifted by the slab elevating device. 1. A slab dividing device comprising: a slag removing device installed downstream of the divided slab to remove slag and solvent generated during gas cutting when the slab is moved downstream.