JPH0221902B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to crop cutting equipment in continuous slab cutting equipment.

Recently, in continuous casting equipment, continuous casting of different steel types accounts for a large proportion, but in continuous casting of different steel types, the crop length at the boundary between different steel types is 1 m.
In many cases, the gap between the rollers has to be large in order to allow the cropped slab to naturally fall downward from between the conveyor rollers using the conventional crop cutting process in which the slab is cantilevered with running gas. Not only does this make it impossible to convey the slab smoothly under normal conditions, but when cutting crops, the slab sags vertically due to its own weight as the cutting progresses, preventing normal gas cutting, resulting in a distorted cut surface. This will cause problems in the rolling process.

In order to solve this problem, gas cutting is carried out in synchronization with a gas cutting device that grips the crop slabs to be cut and separated from the sides, and immediately after the cutting is completed, the crop slabs are cut and separated. Utility patent application No. 56-124266 has proposed a facility for lifting slabs above a conveyance line and transferring them to crop carts provided on the sides in the direction perpendicular to the conveyance line.

However, such conventional equipment has a large-scale equipment configuration, resulting in poor productivity and increased space occupancy, as well as an increase in equipment manufacturing costs.

In view of the above-mentioned circumstances, the present invention has been made for the purpose of providing an extremely simple configuration and inexpensive crop cutting equipment, which runs in synchronization with the slabs continuously carried out from the continuous casting equipment. This is equipment that performs crop cutting using a gas cutting device, in which a group of conveying rollers within a regular cutting range where the gas cutting device cuts the slab by forming an uncut portion in the width direction of the slab, each roller is raised and lowered individually. The roller group within the crop cutting range that cuts the uncut portion following the conveying roller group supports the cropped slab in a cantilevered state outside the uncut portion, and also supports the cropped slab in a cantilevered state while conveying the slab. This crop cutting processing equipment is characterized in that it is configured to be able to turn downward perpendicular to the line.

The present invention will be explained in detail below based on illustrated embodiments.

Figure 1 shows the continuous casting of different steel types, and the boundary part (metal boundary) of the different steel types of the continuous cast piece coming out of the roll group of the continuous casting machine. In the figure, W ₁ is the first steel type, W ₂ is the second steel type, and the hatched W ₀ is the cropped portion including the hot water boundary.

1 is a gas cutting machine that runs in synchronization with the slab; 2
is a gas torch.

3 is a conveying roller group provided downstream of the pinch roll P and the straightening roll R, and each roller is protected from being damaged by the cutting gas flame sprayed from the gas torch when the gas cutting machine 1 passes over it. It is configured to be movable up and down by a hydraulic cylinder 4 so that it can be evacuated to prevent this.

These conveyance roller groups 3 may be provided at least within the range required for cutting the cast slab with uncut parts or cutting it to a fixed length, and this range is referred to as a regular cutting range L.

A tilting roller 5, which will be described in detail later, is provided on the downstream side of the conveyance roller group 3, and below the tilting roller 5 there is a cropping roller running on a rail running perpendicularly to the slab conveyance line. Trolley 6
is located.

Next, the process of cutting the cropped portion _W0 including the hot water border will be described with reference to FIGS. 1a to 1e.

When the crop portion W ₀ comes out of the continuous casting machine, the crop tip T is appropriately detected and the gas cutting machine 1 cuts the crop tip T while traveling in synchronization with the slab. (Fig. 1a) The cut and separated slab of the first steel type _W1 is placed on the tailing roller 5 which is being rotationally driven.
It is then sent in the direction of the arrow in the figure by rear conveyance rollers and fed to a rolling mill in the subsequent process. (FIG. 1b) When this separation cutting is completed, the gas cutting machine 1 immediately retreats and returns to the pre-detected rear end E position of the cropped portion _W0 to begin cropping. (FIG. 1c) This crop cutting is performed so as to form an uncut portion 7 within the usual cutting range L. That is, the cutting with the uncut portion is completed when the end of the regular cutting range L is reached, and at that time, the cropped portion _W0 is already on the tailing roller 5. (Fig. 1d) a starting point that coincides with the end of the regular cutting range L;
The range ending at the midpoint of the first tailing roller 5 is referred to as a crop cutting range c,
Within this crop cutting range c, the uncut portion 7 is cut off, and the cropped portion W ₀ is cut and separated from the slab W ₂ of the second steel type and rides on the tailing roller. (Fig. 1e) When this crop cutting is completed, the tailing roller 5 detects this, stops its rotation, rotates downward perpendicular to the slab conveyance line, and cuts the crop W on top of it. ₀ is allowed to fall naturally onto the crop cart 6 placed below.

Here, the tailing roller 5 will be explained in detail based on FIG. 2. A roller 12 that is driven to rotate at a reduced speed by a motor 10 and a speed reducer 11 is mounted on a base 9 that is pivotally supported by a pin 8. The length l of this roller 12 is the length in front of the center of gravity G of the crop W ₀ and before the uncut portion 7, which is enough to support the crop W ₀ and also to gas cut the uncut portion 7. The structure is such that the cutting gas flame from the torch does not hit the roller 12 when cutting.

Fig. 2 shows an example in which the slab is a bloom, and the gas cutting machine 1 is usually equipped with a pair of torches 2a and 2b, and when the slab width is relatively small, such as a bloom, only one torch 2a is normally used. When the crop is cut, an uncut portion 7 is formed at the side end, and when cutting the crop, the uncut portion 7 may be cut with the torch 2b on the other side, or may be cut with the torch 2a as it is, but this is for reference only. The trajectory of the torch in the former case is shown by an arrow above the torch.

On the other hand, a slab having a wide width is cut by a pair of torches 2a and 2b simultaneously in opposite directions, as shown in FIG. 3, to form uncut portions 7 at appropriate positions in the width direction. This is to shorten the cutting time, and if both torches move in opposite directions at the same speed, an uncut portion 7 would be formed in the center.
In order to prevent the assemblies around the torch from interfering with each other, there is usually a slight difference in the advancing speed between the two torches, so as shown in the figure, the uncut portion 7 is left at a position offset from the center point of the slab width. It is formed.
Incidentally, the locus of movement of the torch is indicated by an arrow as in FIG.

Therefore, the roller 12 of the tailing roller 5 that supports the crop W ₀ ' of such a wide slab may be supported on a cantilever as in the embodiment shown in FIG.
It is also possible to use double-sided double-sided doors as shown in Fig. 3. In addition, this double-sided support not only allows for more stable support, but also allows the length of the roll 12 to be made shorter, thereby reducing the weight of the tailing roller 5 itself. It is possible to downsize the device and, in turn, reduce equipment costs.

As described in detail above, according to the present invention, it is possible to perform crop cutting of moving slabs with an extremely simple configuration without the need for large-scale equipment as in the past, and inexpensive crop cutting equipment can be used. can be provided.

[Brief explanation of drawings]

Fig. 1 is a conceptual diagram of the crop cutting processing equipment and an explanatory diagram of the crop cutting process according to the present invention, Fig. 2 is an explanatory diagram of the tailing roller, and Fig. 3 is an explanatory diagram of the tailing roller in another embodiment. be. 1: Gas cutting machine, 2: Torch, 3: Conveying roller group, 4: Hydraulic cylinder, 5: Tailing roller, 6: Crop truck, 7: Uncut portion, 8: Pin, 9: Base, 10: Motor , 11: Reducer, 1
2: Laura.

Claims (1)

[Claims] 1 Equipment that performs crop cutting using a gas cutting device that runs in synchronization with slabs that are continuously carried out from continuous casting equipment, where the gas cutting device cuts the slabs by forming uncut portions in the width direction of the slabs. The transport roller group within the normal cutting range is configured such that each roller can be raised and lowered individually, and the roller group within the crop cutting range that cuts the uncut portion following the transport roller group is configured to cut off the uncut portion following the transport roller group. What is claimed is: 1. Crop cutting equipment, characterized in that it supports a crop slab in a cantilevered manner on the outside of the section and is configured to be rotatable downward orthogonal to a slab conveyance line.