JPH11244924A - Shape steel rolling system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a shape steel rolling system which reduces a crop as much as possible, improves yield and moreover has excellent producing efficiency. SOLUTION: An odd size material cooling floor 11 for separately storing only semiprocessed products 4 other than the semiprocessed products 4 having a prescribed length which are cut by a hot saw 6 and cooling them is provided. And when the semiprocessed products 4 which are uneven in length compared with the other material are transported as an object to be cut, they are divided into parts which are cut by a cold saw 10 after cooling in a cooling floor 7 and parts which are transported into the odd size material cooling floor 11 by the hot saw 6. Further, plural semiprocessed products 4 having an even length among the semiprocessed products 4 stored in the odd size material cooling floor 11 are bundled and cut into products having a prescribed dimension by the cold saw 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a section rolling system for producing a section steel such as an H section steel having a predetermined product length.

[0002]

2. Description of the Related Art FIG. 6 shows the configuration of a conventional section steel rolling system.

In a section steel rolling system 101 shown in FIG. 1, a material 102 heated to a temperature at which it can be rolled by a heating furnace (not shown) is rolled to a target width and height in a rolling section 103. Then, it is sent out to the transport line 105 as a semi-finished product 104. A hot saw 106 is provided in the middle of the transport line 105, and the tip of the semi-finished product 104 is cut as a crop by the hot saw 106, dropped from the transport line 105 and discarded. The semi-finished product 104 whose tip has been cut is further cut into about two parts as necessary, and then placed on the cooling floor 107 to be cooled. This cooling floor 107 is also called a cooling bed.

The semi-finished product 104 cooled on the cooling floor 107
Is transported again on the transport line 105 and the straightening machine 108
This corrects warpage and bending. Semi-finished product 1
04 are temporarily collected on the accumulation floor 109. Accumulation floor 109
Of the semi-finished products 104 collected by the cold saw 110, a plurality of (six or less at most) semi-finished products 104 are cut together to increase production efficiency. in this case,
The semi-finished product (several tens to hundreds of tens of meters) 104 is sequentially divided into target product lengths (several meters to tens of meters), while the last remaining fraction length falls as a crop from the transport line 105. And discarded. In this way, a plurality of products having the desired length are bundled and shipped through the inspection process.

[0005] In the above section steel rolling system 101,
Material 102 exiting the furnace is of the same specification (same length,
Width, thickness, etc.) and supplied to the section steel line. However, in general, there is a variation of about 2% between the materials, and there is a material whose length is too long or too short compared to a predetermined dimension. Therefore, cold saw 1
10, when a plurality of semi-finished products 104 are cut at once, the lengths of the semi-finished products 104 are not uniform, and after the semi-finished products 104 are cut, the crop remains without dropping from the transport line 105, or the crop processing is performed even if the crops are dropped. There is a problem that a malfunction of full detection occurs in the apparatus.

Conventionally, in order to avoid such inconveniences, although the production efficiency is slightly reduced, a hot saw 10
Attempts have been made to cut the tail crop at 6 to make the length of the semi-finished product 104 a predetermined size. However, when the length of the semi-finished product 104 is too long, the cold saw 110
The same problem as described above occurs, and after the semi-finished product 104 is cut, the crop remains without dropping from the transport line 105. When the semi-finished product 104 is too short, there is a problem that the semi-finished product 104 cannot be cut by the hot saw 106 because the temperature of the semi-finished product 104 is high.

[0007]

As described above, in the conventional section steel rolling system described above, after cutting the semi-finished product 104, the crop remains without dropping from the transport line 105 to stop the line, or Even if it falls, there is a problem that the crop processing device causes a malfunction of full detection and lowers production efficiency.

[0008] Further, the portion other than the predetermined length is discarded as a crop, so that the yield is low. further,
In the cold saw 110, the semi-finished products 104 are cut together from the viewpoint of efficiency. However, even if one of the semi-finished products is long, this portion is discarded as a crop. There was a problem that it was bad.

SUMMARY OF THE INVENTION In view of the above circumstances, it is an object of the present invention to provide a shaped steel rolling system in which the crop is reduced as much as possible, the yield is improved, and the production efficiency is high.

[0010]

In order to attain the above object, according to the present invention, a conveying line for conveying a rolled shaped steel material and a conveyed shaped steel material provided on the conveying line are provided. A hot saw that cuts to a predetermined length, a cooling floor that cools the shaped steel material cut to a predetermined length by the hot saw, and a cold saw that cuts the shaped steel material cooled by the cooling floor to a predetermined product length. In the provided section steel rolling system, an end piece cooling floor for accumulating and cooling only the section steel material other than the predetermined length portion cut by the hot saw is provided.

According to a second aspect of the present invention, in the section steel rolling system according to the first aspect, the hot saw is cooled by the cooling floor when a section steel material having a length equal to that of another material is transported as a cutting target. After that, it is divided into a part to be cut by a cold saw and a part to be sent to the cooling floor for end piece.

According to a third aspect of the present invention, in the shape steel rolling system according to the first or second aspect, a plurality of shaped steel materials having uniform lengths are selected from among the shaped steel materials accumulated in the end piece cooling floor. Then, it is cut into a product of a predetermined size by the cold saw.

According to a fourth aspect of the present invention, a transport line for transporting the rolled shaped steel material, a hot saw provided on the transport line for cutting the transported shaped steel material to a predetermined length, and a hot saw for a predetermined length. In a section steel rolling system comprising: a cooling floor for cooling the section steel material cut into pieces; and a cold saw for cutting the section steel material cooled by the cooling bed to a predetermined product length. Providing a cooling floor for shank material for accumulating and cooling only the shaped steel material other than the length portion, the hot saw, when a shaped steel material not uniform in length with other materials has been transported as a cutting target, The cold saw is divided into a portion that is cut by a cold saw after being cooled by the cooling floor and a portion that is sent to the cooling floor for scrap material. Inside, uniform length By bundling a number of shapes steel is characterized by cutting a product of a predetermined size.

According to the above configuration, the crops conventionally discarded can be reduced as much as possible and can be effectively used as a product. In addition, since the shape steel material accumulated in the cooling floor for the shank material can be cut by the cold saw after the cold-saw cutting of the shape steel material accumulated in the normal cooling floor is completed, the production efficiency can be improved. It is possible to configure a system with good performance.

[0015]

FIG. 1 is a block diagram showing an embodiment of a section steel rolling system according to the present invention.

In the section steel rolling system 1 shown in FIG.
The material 2 heated to a temperature at which it can be rolled by a heating furnace (not shown) is rolled to a target width and height in a rolling section 3, and sent out to a transport line 5 as a semi-finished product 4. A hot saw 6 is provided in the middle of the transport line 5, and the semi-finished product 4 is cut into a predetermined length by the hot saw 6.

In particular, in the section steel rolling system 1 according to this embodiment, the transport line 5 extending from the hot saw 6 to the cooling floor 7 is extended, and the cooling floor 11 for scrap material is provided adjacent to the cooling floor 7. Is provided. For this reason,
The hot saw 6 is a semi-finished product 4 that is cooled by the cooling floor 7 and then cut by a cold saw 10 described later when a shaped steel material having a length not equal to that of another material is transported as a cutting target.
And the semi-finished product 4 sent to the end piece cooling floor 11.

The semi-finished product 4 cooled in the cooling floor 7 is corrected for warpage or bending by a straightening machine 8. The corrected semi-finished product 4 is once collected on the accumulation floor 9. The semi-finished products 4 collected on the accumulating floor 9 are cut into a plurality of pieces (up to about 6 pieces) by the cold saw 10 in order to increase production efficiency. In this case, the semi-finished product (several tens to one hundred and several tens m) 4 is sequentially divided into target product lengths (several to twenty and several tens m), while the last remaining fraction length is cropped as a transport line. Dropped from 5. In this way, a plurality of products having the desired length are bundled and shipped through the inspection process.

As shown in FIG. 2, a first inspection floor 12 and a second inspection floor 13 are provided downstream of the cold saw 10 in the inspection process in the steel shape rolling system 1. The inspection floors 12 and 13 are places where defective products are found from products cut by the cold saw 10, and the defective products are:
It is transported as random material. In addition, the inspection floors 12 and 13
A first pile floor 14, a second pile floor 15, and a third pile floor 16 are provided adjacent to the inspection floor 1.
The products judged as non-defective in 2 and 13 are bundled together in a bundle on any of the first to third pile floors 14 to 16 and then shipped. The reason why a plurality of inspection floors and a plurality of pile floors are provided is to properly use them depending on the product length and the like.

Next, an example of a method of cutting into a portion cut by the cold saw 10 after being cooled by the cooling floor 7 by the hot saw 6 and a portion to be sent to the cooling floor 11 for scrap material will be described.

FIG. 3 shows a cold saw 10 with α material, β material,
And γ material are cut together. When four L1 and one L2 are taken as product length,
The lengths of C1, C2, and C3, respectively, remain. Conventionally, all of this surplus part is discarded as crops.
Further, when the crop C2 is too long and cut off, there is a possibility that the crop C2 may be caught on the transport line. For this reason,
In this embodiment, the following processing is performed.

That is, as shown in FIG. 4, the β material is heated by a hot saw 6 to have a length of L1 × 4 (see FIG. 4A) and another length L3 (see FIG. 4B). Then, only the first half of L1 × 4 is sent to the cold saw 10. Then, as shown in FIG. 5, in the cold saw 10, the α material, the β material, and the γ material are bundled together,
4 × 3 products of length L1 and two products of length L2 can be obtained. Further, the crop C1 of the α material and the crop C3 of the γ material can be processed without stagnation. On the other hand, the latter half of β material, as described above,
It is conveyed to the shaving material cooling floor 11 and the shaved material cooling floor 11
Is stored until it is full, and when a certain amount is collected, it is conveyed to the cold saw 10, and a product having a length L3 longer than the product of L2 can be taken. Since the crop C2 generated in this case is shorter than that in the case of FIG. 3, it is possible to prevent the occurrence of such a problem that the crop C2 is caught on the transport line and stops the line.

Further, a description will be given using numerical values.
When a semi-finished product 4 of 02 meters is conveyed, conventionally, the 2 meters at the tip is cut off as a crop, and the remaining half is divided into two to produce a semi-finished product 4 of 50 meters.
The book was transported to the cooling floor 7. In one method of this embodiment, a 102 meter semi-finished product is 50 meters,
It is divided into 40 meters and 12 meters. The 50-meter and 40-meter portions can be bundled by the cold saw 10 into a 10-meter product, and are conveyed to the cooling floor 7. On the other hand, a semi-finished product 4 of 12 meters
Is transported to the cooling floor 11 for trimming material. If such a semi-finished product 4 having a length other than the predetermined length is stored in the cooling floor 11 for scrap material, it can be used as a nonstandard product. further,
If these are cut together with the cold saw 10, for example, a plurality of products having a length of 6 meters may be used.
Can be made.

As described above, according to this embodiment, the end material cooling floor 11 for separately accumulating and cooling only the semi-finished products 4 other than the semi-finished products 4 of the predetermined length cut by the hot saw 6. In addition, when the semi-finished product 4 of which the length is not the same as that of the other material is transported as a cutting target, the hot saw 6 is cooled by the cooling floor 7 and cut by the cold saw 10, The cold saw 10 bundles a plurality of semi-finished products 4 having the same length among the semi-finished products 4 accumulated in the end piece cooling floor 11. Thus, the crops that have been conventionally discarded can be reduced as much as possible, and can be effectively used as products. In addition, the semi-finished products 4 accumulated in the cooling floor 11 for scrap material
Are cut by the cold saw 10 after the cutting of the semi-finished product 4 accumulated in the ordinary cooling floor 7 is completed by the cold saw 10, so that the inspection floors 12 and 13 are collectively cut.
In this way, it is possible to reduce the generation of irregularly-sized materials in the inspection process, and to construct a system with high production efficiency.

[0025]

As described above, according to the first to fourth aspects of the present invention, the conventionally discarded crop can be reduced as much as possible, can be effectively used as a product, and the crop is caught on the line. It is possible to prevent the occurrence of a trouble such as the line stopping. Furthermore, since the shaped steel material accumulated in the cooling floor for the shank material can be cut by the cold saw after the cold saw of the shaped steel material accumulated in the ordinary cooling floor has been settled down, the production efficiency can be reduced. It is possible to configure a system with good performance.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing an embodiment of a section steel rolling system according to the present invention.

FIG. 2 is a configuration diagram showing an embodiment of a section steel rolling system according to the present invention.

FIG. 3 is an explanatory view schematically showing a problem when cutting with a cold saw.

FIG. 4 is an explanatory diagram schematically showing an example of cutting with a hot saw.

5 is an explanatory view schematically showing a semi-finished product cut in the section steel rolling system shown in FIG. 1;

FIG. 6 is a configuration diagram showing a conventional example of a section steel rolling system.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Section steel rolling system 2 Material 3 Rolling part 4 Semi-finished product 5 Transport line 6 Hot saw 7 Cooling floor 8 Straightener 9 Stacking floor 10 Cold saw 11 Cooling floor for shaving materials 12 First inspection floor 13 Second inspection floor 14 First Piling floor 15 Second pile floor 16 Third pile floor

Claims (4)

[Claims] 1. A conveying line for conveying a rolled shaped steel material, a hot saw provided on the conveying line for cutting the conveyed shaped steel material to a predetermined length, and a hot saw cut to a predetermined length by the hot saw. A cooling floor for cooling the shaped steel material and a cold saw for cutting the shaped steel material cooled by the cooling floor to a predetermined product length, wherein the predetermined length portion cut by the hot saw A rolled steel section system, comprising: a cooling floor for scrap material for accumulating and cooling only shaped steel materials other than the above. 2. The shaped steel rolling system according to claim 1, wherein the hot saw is cooled after being cooled by the cooling floor when a shaped steel material not uniform in length with another material is transported as a cutting target. A shape steel rolling system, wherein the shape steel rolling system is divided into a portion cut by a saw and a portion to be sent to the end piece cooling floor. 3. The shaped steel rolling system according to claim 1, wherein a plurality of shaped steel materials having a uniform length are selected from among the shaped steel materials accumulated in the end piece cooling floor. A shaped steel rolling system, which is cut into products having predetermined dimensions by a cold saw. 4. A transport line for transporting the rolled shaped steel, a hot saw provided on the transport line for cutting the transported shaped steel to a predetermined length, and a hot saw cut to a predetermined length by the hot saw. A cooling floor for cooling the shaped steel material and a cold saw for cutting the shaped steel material cooled by the cooling floor to a predetermined product length, wherein the predetermined length portion cut by the hot saw Providing a cooling floor for shank material for accumulating and cooling only the shaped steel material other than the above, and the hot saw is provided with a cooling floor when a shaped steel material not uniform in length with another material is transported as a cutting target. It is divided into a part to be cut by a cold saw after being cooled, and a part to be sent to the end piece cooling floor, and the cold saw is, in the shape steel material accumulated in the end piece cooling floor, Multiple shaped steel materials of uniform length A shape steel rolling system, comprising: bundling and cutting into products having predetermined dimensions.