JP2001150001A - Wire rod finishing mill - Google Patents

Abstract

(57) [Summary] [PROBLEMS] To significantly improve the operation rate and reduce the occurrence of defective products. SOLUTION: This rolling equipment 1 is arranged on the exit side of a block mill 2 and performs finish rolling of a wire 3 passing through the block mill 2, and two two rolls in order from an upstream side to a downstream side. Rolling mills 4a and 4b and two four-roll rolling mills 5
a, 5b, and the two-roll rolling mills 4a, 4b are mounted on the first rearranging trolley 7, and the four-roll rolling mills 5a, 5b are mounted on the second rearranging trolley 12, and further,
Each two-roll mill 4a, 4b is connected to a separate drive 9,11.
To drive individually.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rolling equipment which is disposed on the exit side of a block mill and performs finish rolling of a wire rod passing through the block mill.

[0002]

2. Description of the Related Art As a conventional wire rod finishing mill of this type, for example, four four-roll mills are arranged on the exit side of a block mill, and two upstream mills of the four four-roll mills are arranged. Is mounted on the first reordering trolley to enable reordering, and the remaining two four-rolling rolling mills are mounted on the second reloading trolley to enable reordering. It is known that both of the two four-roll rolling mills and the two downstream four-roll rolling mills are a common drive driven by a common driving device.

[0003]

However, in the above-mentioned conventional wire rod finishing and rolling equipment, there is a limit in obtaining a large area reduction rate with two upstream four-roll rolling mills. In order to produce wires in a wide range of sizes, it is necessary to frequently replace the block mill rolls with rolls of different sizes, complicating the pass schedule, and easily causing misrolls and defective diameters immediately after replacement. Therefore, there is an inconvenience that the operation rate decreases and the occurrence rate of defective products increases.

[0004] The present invention has been made to solve such inconvenience, and it is an object of the present invention to provide a wire finishing and rolling equipment capable of improving the operation rate and reducing the occurrence of defective products. With the goal.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, a wire finishing mill according to the present invention is provided at a delivery side of a block mill and performs a finish rolling of a wire passed through the block mill. And at least two two-roll rolling mills and at least two four-roll rolling mills are arranged in order from the upstream side to the downstream side, and each two-roll rolling mill is placed on the first reordering bogie. It is characterized in that each of the four-roll rolling mills is mounted on the second reordering trolley, and each of the two-roll rolling mills is individually driven by a separate driving device.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG. In FIG. 1, reference numeral 1 denotes a wire finishing mill that is disposed on the exit side of the block mill 2 and performs finish rolling of the wire 3 that has passed through the block mill 2.
The wire rod finishing rolling equipment 1 includes two two-roll rolling mills 4a and 4b arranged in order from the upstream side to the downstream side;
Two 4-roll mills 5a capable of size-free rolling,
5b.

The block mill 2 includes, for example, ten rolling mills 2a.
To 2j, and each of the rolling mills 2a to 2j is a common drive driven by a common motor 6. The two-roll rolling mills 4a and 4b are arranged so that the rolling direction is tilted by 90 ° with respect to each other, and both are mounted on the first reordering cart 7 and can be exchanged. Also,
The two-roll rolling mill 4a is driven by a motor (driving device) 9 via a speed increasing device 8, and the two-roll rolling mill 4b is driven by a motor (driving device) 11 via a speed increasing device 10. Thus, the two-roll rolling mills 4a and 4b are individually driven by separate motors 9 and 11.

On the other hand, the four-roll rolling mills 5a and 5b are arranged so that the rolling direction is inclined by 45 ° with respect to each other.
Is mounted on the rearrangement truck 12 and can be rearranged. The four-roll rolling mills 5a and 5b are a common drive driven by a common motor 14 via a switching gearbox 13. As described above, in the wire finishing and rolling equipment of this embodiment, two two-roll rolling mills 4a and 4b capable of obtaining a large area reduction rate are arranged on the upstream side, and the two-roll rolling mills 4a and 4b are separately provided. Since the motors 9 and 11 are individually driven, the area reduction rate can be increased, and the reduction rate of the two-roll rolling mills 4a and 4b can be reduced by changing the rotation speed of the motors 9 and 11. Can be changed.

Thus, without replacing the rolls of the block mill 2 with rolls of different sizes, in other words,
With one kind of pass schedule of the block mill 2, it is possible to produce a wire rod having a wide size range from a small diameter to a large diameter, and since the roll exchange of the block mill 2 becomes unnecessary, a mis-roll immediately after the roll exchange is performed. As a result, the operation rate can be improved and the occurrence rate of defective products can be reduced.

Next, in order to clarify the effect of the present invention, a detailed description will be given with reference to a specific pass schedule. Here, the wire rod of φ22.6 mm is reduced to φ18.0 mm by the rolling mills 2 a and 2 b of the block mill 2 and φ12.6 mm by the rolling mills 2 a to 2 d.
To 14.4 mm, φ11.6 mm with rolling mills 2 a to 2 f
To 9.4 mm by rolling mills 2a to 2h,
The case of rolling to φ7.5 mm at 2j is taken as an example.

The wire rods rolled to a diameter of 7.5 mm by the rolling mills 2a to 2j are finish-rolled to a diameter of 5.5 to 6.7 mm by the two-roll rolling mills 4a and 4b and the four-roll rolling mills 5a and 5b. The wire rod which has been rolled to φ9.4 mm in 2a to 2h is guided to the wire rod finishing and rolling equipment 1 via a guide pipe or the like, and is φ6.8 by the rearranged two-roll rolling mills 4a and 4b and the four-roll rolling mills 5a and 5b. ~ Φ8.
The wire rod is finish-rolled to 3 mm (in this case, the rolling mills 2i and 2j are retracted), and the wire rod rolled to φ11.6 mm by the rolling mills 2a to 2f is guided to the wire rod finishing and rolling equipment 1 via a guide pipe or the like to be rearranged. Two-roll mills 4a, 4b and 4
8.4 to 10.3 m by roll mills 5a and 5b
m (in this case, rolling mills 2g, 2h, 2i, 2
j is retracted), and the two-roll rolling mills 4a, 4b, and four-roll rolling mills in which the wire rods rolled to 14.4 mm by the rolling mills 2a to 2d are guided to the wire finishing rolling equipment 1 via guide pipes and the like and rearranged. Φ10.4 to 1 depending on 5a and 5b
Rolled to 2.8 mm (in this case, rolling mills 2e, 2f,
2g, 2h, 2i and 2j are retracted), and the wire rolled to 18.0 mm by the rolling mills 2a and 2b is guided to the wire finishing rolling equipment 1 via a guide pipe or the like, and the rearranged two-roll rolling mill 4a, Rolled to φ12.9 to 15.7 mm by 4b and 4 roll rolling mills 5a and 5b (in this case, rolling mills 2c, 2d, 2e, 2f, 2g, 2h, 2
i, 2j are saved).

The rolling mills 2a to 2 of the block mill 2
j rolls the wire rod to φ7.5 mm in a two-roll rolling mill 4
a, 4b and 4 roll rolling mills 5a, 5b.
In order to finish-roll to 5-φ6.7 mm, first, φ7.5
mm of the wire rod is supplied to each motor 9 of the two-roll rolling mills 4a and 4b.
After adjusting the number of rotations of 11 and rolling to φ6.0 to φ6.2 mm, a wire rod of φ5.5 to φ6.0 mm was obtained by size-free rolling by the four-roll rolling mills 5a and 5b, and then a wire of φ7.5 mm was obtained. The number of rotations of the motors 9 and 11 of the two-roll mills 4a and 4b is adjusted by adjusting the rotation speed of the wire rod from φ6.7 to φ6.
After rolling to 9 mm, a wire rod of φ6.1 to φ6.7 mm is obtained by size-free rolling by the four-roll rolling mills 5a and 5b, thereby obtaining a wire rod of φ5.5 to φ6.7 mm.

In the rolling mills 2a to 2h of the block mill 2, φ
The wire rod rolled to 9.4 mm is rolled into two-roll mills 4a, 4a.
b and 4 roll rolling mills 5a, 5b
In order to finish-roll to 8.3 mm, first, the two-roll rolling mills 4a and 4b and the four-roll rolling mills 5a and 5b are reconfigured to have a predetermined size.
After the number of rotations of each of the motors 9 and 11 of the roll rolling mills 4a and 4b is adjusted to reduce the diameter to 7.45 to 7.75 mm,
A wire rod of φ6.8 to φ7.5 mm is obtained by size-free rolling by the roll mills 5a and 5b.
The rotation speed of each motor 9 and 11 of the two-roll rolling mills 4a and 4b is adjusted by adjusting the rotation speed of the 4 mm wire rod to φ8.25 to φ8.55 m.
After being rolled to m, a wire rod of φ7.6 to φ8.3 mm is obtained by size-free rolling by the four-roll rolling mills 5a and 5b, thereby obtaining a wire rod of φ6.8 to φ8.3 mm.

In the rolling mills 2a to 2f of the block mill 2, φ1
The 1.6 mm-rolled wire is rolled into two-roll rolling mills 4a, 4a.
b and φ rolls 8.4 to φ by the four-roll rolling mills 5a and 5b.
In order to finish-roll to 10.3 mm, first, the two-roll rolling mills 4a and 4b and the four-roll rolling mills 5a and 5b are replaced with those having a predetermined size, and then the wire having a diameter of 11.6 mm is turned into a two-roll rolling mill 4a. After adjusting the number of rotations of each of the motors 9 and 11 of 4b and rolling them to φ9.25 to φ9.55mm, a wire rod of φ8.4 to φ9.2mm is obtained by size-free rolling by the four-roll rolling mills 5a and 5b. Then
The number of rotations of the motors 9 and 11 of the two-roll rolling mills 4a and 4b is adjusted by adjusting the rotation speed of the φ11.6 mm wire rod to φ10.25 to φ1.
After rolling to 0.65 mm, 4-roll rolling mills 5a and 5b
Φ9.3 to φ10.3 by size free rolling
mm of wire rod, thereby obtaining φ8.4 to φ10.3 m
m is obtained.

The rolling mills 2a to 2d of the block mill 2
The wire rod rolled to 4.4 mm is rolled into two-roll rolling mills 4a, 4a.
b and φ10.
In order to finish-roll to a diameter of 12.8 mm, first, the two-roll rolling mills 4a and 4b and the four-roll rolling mills 5a and 5b are replaced with those having a predetermined size. After adjusting the number of rotations of each of the motors 9 and 11 of 4b and rolling to φ11.5 to φ11.9mm, a wire rod of φ10.4 to φ11.5mm is obtained by size-free rolling by the four-roll rolling mills 5a and 5b, Next, a wire rod of φ14.4 mm is rolled into two-roll mills 4a and 4b.
The rotation speed of each motor 9, 11 is adjusted to
After rolling to 13.2 mm, 4-roll rolling mills 5a and 5b
Φ11.6 to φ12.
An 8 mm wire rod was obtained, whereby φ10.4 to φ12.
8 mm wire is obtained.

The rolling mills 2a and 2b of the block mill 2
The wire rolled to 8.0 mm is rolled into two-roll rolling mills 4a, 4a.
b and 4 roll mills 5a, 5b to φ12.9-
In order to finish-roll to a diameter of 15.7 mm, first, the two-roll rolling mills 4a and 4b and the four-roll rolling mills 5a and 5b are reconfigured to have a predetermined size, and then the wire having a diameter of 18.0 mm is converted to a two-roll rolling mill 4a. After adjusting the rotation speed of each of the motors 9 and 11 of 4b and rolling to φ14.2 to φ14.6mm, a wire rod of φ12.9 to φ14.2mm is obtained by size-free rolling by the four-roll rolling mills 5a and 5b. Next, a wire having a diameter of 18.0 mm is rolled into two-roll rolling mills 4a and 4b.
By adjusting the rotation speed of each of the motors 9 and 11 from φ15.7 to φ15.7
After rolling to 16.1 mm, 4-roll rolling mills 5a and 5b
Φ14.3 to φ15.
7 mm wire was obtained, whereby φ12.9 to φ15.
Obtain a 7 mm wire.

As described above, in this embodiment, it is possible to produce a wire rod having a wide size range from φ5.5 mm to φ15.7 mm without replacing the rolls of the block mill 2 with rolls of different sizes. You can see that.

[0018]

As is apparent from the above description, according to the present invention, it is possible to produce a wire rod having a wide size range from a small diameter to a large diameter without replacing a roll of a block mill with a roll of a different size. In addition, since there is no need to replace the rolls of the block mill, there is no occurrence of misrolls or defective diameters immediately after the roll replacement, so that the operation rate can be improved and the occurrence of defective products can be reduced. The effect is obtained.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram for explaining a wire rod finishing and rolling facility which is an example of an embodiment of the present invention, together with a pass schedule.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Wire rod finishing rolling equipment 2 ... Block mill 3 ... Wire rod 4a, 4b ... 2 roll rolling mill 5a, 5b ... 4 roll rolling mill 7 ... 1st rearrangement trolley 12 ... 2nd rearrangement trolley 9, 11 ... Motor (Drive device)

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Tomoyasu Sakurai 1-chome, Mizushima-Kawasaki-dori, Kurashiki-shi, Okayama Pref. Chome (without address) Kawasaki Steel Corporation Mizushima Works (72) Inventor Takeshi Tange 5-2 Sokaicho, Niihama-shi, Ehime Prefecture Sumitomo Heavy Industries, Ltd. Niihama Works F-term (reference) 4E002 AC12 AC14 CB08

Claims (1)

[Claims] Claims: 1. A rolling equipment which is arranged on the exit side of a block mill and performs finish rolling of a wire rod passing through the block mill, wherein at least two two-roll rolling mills are arranged in order from an upstream side to a downstream side. And at least two four-roll rolling mills, each two-roll rolling mill is mounted on a first rearranging trolley, and each four-roll rolling mill is mounted on a second rearranging trolley. A finishing mill for wire rods, wherein the roll mills are individually driven by different driving devices.