JP3212171B2 - Hot rolling device and hot rolling method for strip material - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hot-rolling apparatus and a hot-rolling method for a strip, and more particularly, to rolling a raw material introduced from a heating furnace by a rolling mill train to obtain a predetermined strip. The present invention relates to a hot rolling apparatus and a hot rolling method for a strip material to be rolled into a material shape.

[0002]

2. Description of the Related Art A hot rolling apparatus for a strip material generally comprises a rough row having one or a plurality of rough rolling mills for rolling a material delivered from a heating furnace, and a raw material formed in the rough row. An intermediate row having one or more intermediate rolling mills for rolling, and a finishing row having one or more finishing rolling mills for rolling an intermediate material formed in the intermediate row into a shape of a final product.

[0003] The rough row, the middle row and the finishing row are arranged in series, and the material extracted from the heating furnace is passed through a rough rolling mill arranged at the front end of the rough row, and is sent to the finishing row via the intermediate row. Then, a product formed into a predetermined shape is sent out from a finishing mill arranged at the rearmost end of the finishing row. BACKGROUND ART In a rolling device for rolling a material into a small-diameter strip or wire (hereinafter simply referred to as a strip), a rolling speed of a finishing row is increased as much as possible in order to increase a production amount of a product, and a plurality of parallel rows are formed. A rolling line is provided. A plurality of materials extracted from the heating furnace are respectively passed along one rolling line to one of the same rolling mill group or a parallel rolling mill group, and a plurality of strip products are substantially removed from each of the rolling lines. Sent at the same time.

[0004] Further, in such a rolling device or rolling method, a winding device for winding a metal piece to be rolled is provided between a reversible rough rolling mill and a finish rolling mill in order to shorten the overall length of the rolling device. Are known (Japanese Patent Publication No. 50-30028)
JP, JP-B-51-26317, JP-B-52-
No. 45304, JP-B-53-16380 and JP-B-64-3575. According to such a rolling device or rolling method, the winding device disposed between the coarse row and the finishing row winds the metal to be rolled out from the coarse row from the tip to form a coil of the metal to be rolled. Immediately after the coil is formed, the metal to be rolled is fed from the rear end to the finishing row. In such a rolling device or rolling method, the distance between the coarse row and the finishing row is reduced by transiently winding the metal to be rolled between the rough row and the finishing row. It can be shortened.

[0005]

However, in such a conventional rolling apparatus or rolling method, the raw material introduced in the rough row is fed along the same continuous rolling line, and the finishing row of the rolling line is Must be set to a speed that always correlates the introduction speed of the material introduced into the coarse row and the delivery speed of the product delivered from the finishing row. For example, when attempting to produce a small-diameter strip from a material having a large cross-section in order to increase the production of the strip, the introduction speed of the coarse row is increased to a speed at which the desired large-section material can be rolled. I have to do it. However, there is a limit to the increase in the delivery speed in the finishing line.
Therefore, it is difficult to increase the introduction speed of the coarse rows related to the delivery speed as desired, and it is not possible to increase the introduction speed of the coarse rows to a speed at which the material having the large cross-sectional shape can be rolled.
Thus, rolling of a material having a large cross-sectional shape exceeding a predetermined cross-sectional dimension is not actually performed.

[0006] Further, in a conventional rolling device or rolling method,
Multiple rolling lines are provided to increase production. The coarse row generally comprises a group of horizontally oriented horizontal mills, in which the material is rolled in the horizontal mill group in a double row rolling, for example a double pass rolling. In such a rolling method,
Since the material is rolled by so-called twist rolling and torsion and high tension are imposed on the metal to be rolled between the rolling mills, it is not possible to produce a high-quality high-grade strip.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and an object of the present invention is to increase the production of a strip by rolling a strip having a small diameter from a material having a large cross-sectional shape. An object of the present invention is to provide a hot-rolling apparatus and a hot-rolling method for a strip that can be formed. Another object of the present invention is to provide a hot-rolling apparatus and a hot-rolling method for a strip capable of rolling a material by so-called non-twist rolling while securing a high production amount of the strip.

[0008]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention provides a first rolling mill train having a rolling mill for rolling a material introduced from a heating furnace, and a first rolling mill train. And a second rolling mill row having a rolling mill for rolling the material rolled into a predetermined strip shape by a hot rolling apparatus for strips, wherein the raw material delivered from the first rolling mill row is Receiving at a first speed corresponding to the feed speed of the material, forming a winding of the material, at a second speed corresponding to the introduction speed of the second rolling mill row and lower than the first speed; A winding device for feeding the material from the winding of the material to the second rolling mill row is provided between the first rolling mill row and the second rolling mill row. A hot rolling apparatus for a material is provided.

According to the present invention, the material introduced from the heating furnace is rolled by a first rolling mill row, and the material rolled by the first rolling mill row is rolled into a predetermined strip shape by a second rolling mill row. In the method for hot rolling of a strip material, the material delivered from the first rolling mill row between the first rolling mill row and the second rolling mill row, Accept at one speed,
Forming a winding of the material and winding the material from the second rolling mill train at a second speed corresponding to the introduction speed of the second rolling mill train and lower than the first speed; The present invention provides a hot rolling method for a strip, which comprises feeding a material to a strip.

According to the above configuration of the present invention, the material delivered from the first rolling mill train is the first material corresponding to the material delivery speed.
After being wound up at a speed, it is introduced into the second rolling mill train at a second speed corresponding to the introduction speed of the second rolling mill train. By winding the material once between the first rolling mill row and the second rolling mill row,
Both rolling mill trains are substantially isolated, and the direct correlation between the rolling speed of the first rolling mill train and the rolling speed of the second rolling mill train is broken. Therefore, each rolling speed of the first and second rolling mill rows can be set relatively freely. Moreover, since the first speed is set higher than the second speed and the rolling speed of the first rolling mill row is set relatively high, the material introduction speed of the first rolling mill row is increased. . Thus, a material having a large cross-sectional shape can be introduced into the first rolling mill row, and a relatively small-diameter strip can be delivered from the second rolling mill row.

[0011] In a preferred embodiment of the present invention, the first rolling mill row includes a horizontal rolling mill and a vertical rolling mill, which are arranged alternately and roll the material by single rolling. A plurality of aircraft are arranged in parallel,
The winding device selectively feeds the material to each second rolling mill row. According to such a configuration, the material is passed through the horizontal / vertical rolling mill group of the first rolling mill row by one thread and rolled by non-twist rolling.

In a further preferred embodiment of the present invention, the first rolling mill row includes a coarse row and an intermediate row, and the coarse row and the intermediate row are alternately arranged horizontal rolling mills and vertical rolling mills, respectively. And the second rolling mill row is constituted by a finishing row having alternately arranged horizontal rolling mills and vertical rolling mills. According to such a configuration, the material is passed through the horizontal / vertical rolling mill group of the first rolling mill row and the second rolling mill row by one thread, and is rolled by non-twist rolling throughout.

According to an embodiment of the present invention, a plurality of winding devices are provided between a first rolling mill row and a second rolling mill row, and each of the winding apparatuses is arranged in parallel. Multiple second
It is arranged in series for each of the rolling mill rows. Preferably, a plurality of winding devices are arranged for one of the second rolling mill rows, and the winding device group winds the material alternately and unwinds the material alternately. More preferably, the winding device includes a pinch roller for receiving the material at a high speed and sending the material at a low speed, and winding means for winding the material received via the pinch roller.

[0014]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of a hot rolling apparatus and a hot rolling method for a strip according to the present invention will be described below in detail with reference to the accompanying drawings. FIG. 1 is a schematic overall plan view showing a hot rolling apparatus according to the present invention, and FIG. 7 is a schematic overall plan view showing a conventional hot rolling apparatus.

Before describing the embodiments of the present invention, the configuration of a conventional rolling mill will be schematically described. As shown in FIG. 7, the rolling device 100 is provided with a material W sent out of a heating furnace.
Rolling mill train (hereinafter referred to as a rough rolling train) 102 in which
An intermediate rolling mill row (hereinafter referred to as an intermediate row) 104 into which the raw material W sent from the coarse row 102 is introduced;
4 has parallel finishing rolling mill rows (hereinafter, referred to as finishing rows) 106, 106 into which the semi-molded products sent from 4 are introduced. The strip delivered from the finishing line 106 is wound up by a product winding device (not shown) via a product water cooling device or the like (not shown).

The coarse row 102 has a plurality of horizontal rolling mills 112 that are horizontally oriented, and the horizontal rolling mills 112 are arranged in series along the feeding direction of the raw material W. Coarse row 102
Has two rolling lines that perform double rolling, and two raw materials W are introduced into the coarse row 102 in parallel. Middle row 1
04 has a plurality of horizontal rolling mills 114 oriented horizontally, and the horizontal rolling mills 114 are arranged in series along a rolling line. The middle row 104, like the coarse row 102,
It has two rolling lines that perform double rolling,
The two raw materials W molded in 2 are arranged in the middle row 104 in parallel.
Will be introduced.

The finishing rows 106 and 106 are arranged in two rows downstream of the intermediate row 104, and each finishing row 106 is
And a rolling mill group (not shown) for rolling the material W rolled in 4 into a predetermined product shape. The two rolling lines are divided downstream of the intermediate row 104 toward two finishing rows 106, 106, and the two blanks W sent out from the intermediate row 104 are separated.
Are introduced into each finishing row 106 respectively.

Next, a rolling apparatus 1 according to the embodiment of the present invention shown in FIG. 1 will be described. The rolling device 1 includes a rough row 2 and an intermediate row 4 each including a group of rolling mills arranged in series, and two finishing rows 6 and 6 arranged downstream of the intermediate row 4. Is wound up by a product winding device (not shown) through a product water cooling device or the like (not shown).

The coarse row 2 has a plurality of horizontally oriented horizontal rolling mills 12 and a plurality of vertically oriented vertical rolling mills 13. The horizontal rolling mill 12 and the vertical rolling mill 13 They are arranged alternately along the line. The coarse row 2 has a single rolling line for performing so-called non-twist rolling by single rolling, and one raw material W is passed through the coarse row 2. The intermediate row 4 also has a single rolling line for performing non-twist rolling, and one raw material W sent from the coarse row 2 is introduced into the intermediate row 4. The middle row 4 is composed of a plurality of horizontal rolling mills 14 oriented horizontally and a plurality of vertical rolling mills 15 oriented vertically, and the horizontal rolling mill 14 and the vertical rolling mill 15 are arranged.
And are alternately arranged along the rolling line.

The finishing rows 6, 6 are arranged in two rows downstream of the intermediate row 4, and each finishing row 6 is made of a material W rolled in the intermediate row 4.
Has a plurality of horizontal rolling mills 16 and vertical rolling mills 17 for rolling the steel into a predetermined product shape. The two rolling lines formed by the finishing rows 6 and 6 roll the material W rolled in the intermediate row 4 into a predetermined product shape, and a product water cooling device or the like (not shown).
To send to.

Between the intermediate row 4 and the finishing row 6, there is an intermediate row 4
An intermediate winding area 8 is provided for temporarily retaining the material W sent out of the apparatus. Material W deflected downstream of middle row 4
Is wound once in the intermediate winding area 8 and is unwound from the intermediate winding area 8 to the finishing rows 6 and 6 as two rolling lines, respectively. The intermediate winding area 8 is provided with four intermediate winding devices (hereinafter, simply referred to as winding devices) 20, 20, 20, and 20, and these winding devices 20 are paired with each finishing line. 6 are respectively arranged on the upstream side. The material W sent out from the intermediate row 4 is alternately deflected toward one of the finishing rows 6, 6, and
A pair of winding devices 20, 2 arranged for each finishing row 6
0 alternately winds the material W guided from the middle row 4
The materials W are sequentially supplied to the corresponding finishing rows 6.

FIG. 2 is a front view schematically showing the structure of the winding device 20. FIG. 3 is a partially enlarged cross-sectional view showing the structure of the winding device 20 around the winding frame. The winding device 20 includes a pair of pinch rollers 22, 22 that receive the material W fed from the intermediate row 4, and a pinch roller holding unit 24 that holds the pinch rollers 22, 22. 24 is supported by a vertical support 26 implanted on a turntable 30. The pinch roller 22 is
Connected to the output shaft of the reducer via a ball joint,
The speed reducer is connected to the drive motor via a gear connection. As the drive motor, a DC electric motor that can rotate forward or reverse by switching the polarity (anode / cathode) and variably control the number of rotations by a change in applied voltage and a change in field current can be preferably used. Although these transmission mechanisms, drive mechanisms, and joints are not shown for simplification of the drawing, these mechanisms or joints are not limited to a specific structure. General mechanical components that can be used to drive the motor can be appropriately adopted.

On the downstream side of the pinch roller 22, a guide tube 27 for guiding the material W sent from the pinch roller 22 is provided.
Are arranged, and the guide tube 27 takes up the material W on the winding drum 40.
To guide. The winding drum 40 includes a winding frame 42 for forming a winding of the material W, a bottom plate 50 arranged inside the winding frame 42 so as to be able to move up and down, and a driving device 60 for rotating the winding frame 42. As shown in FIG. 3, the lower end of the bobbin 42 is fixed to the upper end of the hollow shaft 44, and the hollow shaft 44 is
And is rotatably supported by the gear case 45 by bearings 46 and 47. A bevel gear 48 is integrally fixed to the outer peripheral surface of the hollow shaft 44 in the gear case 45 by a key or shrink fitting.

A drive gear 68 that meshes with the bevel gear 48 is disposed in the gear case 45, and the drive gear 68 is integrally supported at one end by a drive shaft 64. The drive shaft 64 is
The gear case 45 is rotatably supported by the gear case 45 by the bearing 66, and penetrates through the gear case 45 to form the gear connecting portion 62.
Is connected to the output shaft 61 of the driving device 60 via the. Drive device 60 arranged adjacent to gear case 45
Is composed of, for example, an electric motor.

The bottom plate 50 is connected to the lifting shaft 5 via a bearing 52.
4 is rotatably supported at the upper end. Elevating shaft 54
Hangs down along the rotation axis of the bottom plate 50 and penetrates through the hollow portion of the hollow shaft 44. As shown in FIG. 2, the lower end portion of the elevating shaft 54 projects below the hollow shaft 44 and
The lower end of 4 has a trunnion-type connecting portion 56.
The connecting portion 56 is pivotally attached to one end of a link lever 72 extending laterally. The other end of the link lever 72 is pivotally connected to a piston rod 71 of a trunnion type fluid cylinder device 70, and a central portion of the link lever 72 is connected to the gear case 45.
Is rotatably supported by a support shaft 74 supported by the bracket.

An upper end of the cylinder case of the cylinder device 70 is pivotally attached to a support shaft 76. The support shaft 76 is attached to the gear case 45 via a bracket, and thus the cylinder device 70 is supported swingably about the support shaft 76. Further, the cylinder device 70 is connected to a fluid pressure control circuit (not shown), and the control circuit controls the supply and discharge of the working fluid to and from the cylinder device 70.

The turntable 30 is fixed to a rotating shaft 32 extending downward, and the rotating shaft 32 is rotatably supported by a bearing housing 80 via a plurality of bearings 34. It is integrally supported by the three-dimensional body 81. On the upper surface of the base assembly 81, the internal gear or ring gear 3 disposed around the rotation shaft 32 is provided.
5 is fixed. The ring gear 35 meshes with a pinion gear 36, and the pinion gear 36
Operatively connected to the output shaft of the drive 38 via The drive device 38 is configured by, for example, an electric motor or the like. The speed reducer 37 and the driving device 38 are integrally supported by the turntable 30, and the turntable 30
Receives the reaction force from the ring gear 35 by the operation of the driving device 38 and rotates about the rotation shaft 32.

The drive mechanism of the turntable is shown in FIG.
Various modifications are possible without being limited to those shown in FIG. For example, in the modification shown in FIG. 4, the driven gear 33a is fixed to the outer peripheral surface of the rotating shaft 32, and the driven gear 33a is fixed to the driving gear 35a fixed to the end of the driving shaft 36a.
Are engaged. The drive shaft 36a is connected to an output shaft 39a of a drive device 38a via a gear connection 37a.

Next, the operation of the rolling apparatus 1 of this embodiment will be described in comparison with the operation of the conventional rolling apparatus 100. In the conventional rolling apparatus 100 (FIG. 7), two raw materials W introduced into the coarse row 102 from the heating furnace at a speed Vi are passed in parallel to a horizontal rolling mill 112 in the coarse row 102. The material W is twisted by about 90 degrees between the horizontal rolling mills 112, and is rolled by so-called twist rolling. The two blanks W sent out from the coarse row 102 are introduced into the intermediate row 104 and passed through the horizontal rolling mill 114 in the intermediate row 104 in parallel. The material W is twisted by about 90 degrees between the horizontal rolling mills 114, rolled by twist rolling, and sent out from the intermediate row 104 at a speed Vm.

Two materials W sent from the intermediate row 104
Is divided toward finishing rows 106, 106, and each finishing row 1
06 respectively. The introduction speed of the material W into the finishing line 106 is substantially equal to the sending speed from the intermediate line 104, that is, the speed Vm. The raw material W rolled into a predetermined product shape in the finishing row 106 is fed from the finishing row 106 as a strip to the speed Vo
And is wound up by a product winding device through a product water cooling device and the like.

On the other hand, in the rolling apparatus 1 (FIG. 1) of the present embodiment, one raw material W introduced into the coarse row 2 at a speed VI from the heating furnace is supplied to the horizontal rolling mill 12 and the vertical rolling mill 12 in the coarse row 2. Machine 13. The material W is rolled by so-called non-twist rolling by alternately arranged horizontal / vertical rolling mills 12 and 13. The raw material W sent from the coarse row 2 is introduced into the intermediate row 4 and is rolled by non-twist rolling by the horizontal / vertical rolling mills 14 and 15 in the intermediate row 4. The material W thus rolled into a semi-finished product is delivered from the intermediate row 4 at a speed VM.

FIG. 5 is a schematic flow chart showing the path of the material W sent out from the intermediate row 4. FIG. 6 is a time chart schematically showing the winding and unwinding times of the winding device 20. It is. As shown in FIG. 5, the material W sent out from the intermediate row 4 is guided toward one finishing row 6 (first finishing row 6A), and a pair of materials W arranged upstream of the first finishing row 6A. Winding devices 20, 20 (first winding device group 20A)
Is wound by one of the winding devices, for example, the winding device 20a.

While the winding device 20a of the first winding device group 20A winds the material W, the material W sent from the intermediate row 4 is
One of a pair of winding devices 20, 20 (second winding device group 20 </ b> B) guided toward the other finishing line 6 (second finishing line 6 </ b> B) and arranged upstream of the second finishing line 6 </ b> B. It is wound by a winding device, for example, the winding device 20c. The material W continuously sent from the intermediate row 4 is wound by the other winding device 20b of the first winding device group 20A, and the material W sent from the intermediate row 4 following the material W is the second winding. It is wound by the other winding device 20d of the group of winding devices 20B. Thus, the material W sent from the intermediate row 4 is the first material W
As shown in FIG. 6, one of the winding devices 20A to 20D which is alternately fed to the winding device group 20A and the second winding device group 20B and constitutes each of the winding device groups 20A and 20B sequentially winds the winding device. Taken.

As shown in FIG. 6, the winding devices 20a to 20d which have taken up the material W are arranged in the corresponding finishing row 6 in the order of winding.
Material W is sequentially fed to A or 6B. That is, the material W
The winding device 20a of the first winding device group 20A that has wound the
First, the material W is fed out to the first finishing row 6A, and then, the winding device 20 of the second winding device group 20B that has wound the material W next.
c feeds the material W to the second finishing row 6B,
0c, the first winding device group 20 that has wound the material W
A, the winding device 20b feeds out the material W to the first finishing row 6A, and finally, the second winding device group 20 which has wound the material W.
The winding device 20d of B feeds out the material W to the second finishing row 6B.

Such an operation is repeatedly and sequentially performed, and the material W sent out from the intermediate row 4 is alternately wound on each of the winding devices 20a to 20d of the first and second winding device groups 20A and 20B. Then, the winding device 20 that has wound up the material W sequentially unwinds the material W to the corresponding finishing row 6A or 6B. Thus, the intermediate take-up area 8 shown in FIG. 1 feeds the material W introduced at the speed VM to each finishing line 6 by the four winding devices 20 at the speed VN set to be lower than the speed VM. And the speed VN can be theoretically set to half the speed of the speed VM.

Next, each winding device 2 in the above winding operation
The operation of 0 will be described. The material W sent from the intermediate row 4 at the speed VM is applied to the pinch roller 22 of the winding device 20,
22, and the pinch rollers 22, 22
By the forward rotation of the drive motor, the material W is fed to the winding drum 40 via the guide tube 27 at the receiving speed VM. The winding frame 42 of the winding drum 40 includes a bevel gear 48 and a driving gear 6.
The material W is rotated by the driving force of the drive motor 60 transmitted via the motor 8 (FIG. 3), and the material W is wound up until the rear end of one material W reaches just before the pinch rollers 22, 22. Is formed. In the initial stage of winding, the cylinder device 70 extends the piston rod 71,
Therefore, the bottom plate 50 is located at the raised position, but as the feeding of the material W by the pinch rollers 22 and the winding operation of the material W by the reel 42 progresses, the piston rod 7
1 and retract the bottom plate 50 to the lowered position shown in FIGS.
Descend. Further, after the rear end of the material W passes through the last rolling mill in the intermediate row 4, the rotation speed of the pinch rollers 22, 22 is reduced, and the rear end of the material W is
Sent to the vicinity of 22. Such a pinch roller 2
The control of 2 and the like is executed by, for example, variably controlling the voltage applied to the drive motor for the pinch roller 22 according to a command from a computer or a sequencer (not shown).

When the winding of the material W is thus formed in the winding frame 42, the winding device 20 drives the driving device 38,
The driving device 38 is connected to the pinion gear 36 via the speed reducer 37.
To rotate. The pinion gear 34 rolls on the inner peripheral gear of the ring gear 35, thus turning the turntable 30.
Is rotated by a predetermined angle. The pinch rollers 22, 22 gripping the rear end of the material W are aligned with the finishing row 6 located rearward by the rotation of the turntable 30. Thereafter, the winding device 20 includes the pinch rollers 22, 2
The drive motor 2 is rotated in the reverse direction to rotate the pinch rollers 22 and 22 in the feeding direction, and the drive motor 60 rotates the winding drum 40 in the reverse direction, thereby feeding the material W toward the finishing row 6. The feed speed of the pinch rollers 22, 22, ie, the speed V at which the winding device 20 feeds out the material W.
N is set equal to the material receiving speed of the finishing row 6, and the pinch rollers 22, 22 are rotated at a lower speed than the material receiving speed by controlling the rotation speed of the drive motor. Thus, the winding device 20 feeds out the material W at the speed VN synchronized with the operation speed of the finishing row 6.

As described above, the rolling apparatus 1 of the present embodiment provides the rough row 2 in which the raw material W introduced from the heating furnace at the speed VI is rolled by the non-twist rolling by the horizontal / vertical rolling mills 12 and 13.
And the raw material W sent from the coarse row 2 is rolled by non-twist rolling by the horizontal / vertical rolling mills 14 and 15 to obtain a speed V
An intermediate row 4 for feeding at M, and finishing rows 6 and 6 arranged in two rows downstream of the intermediate row 4 and having horizontal / vertical rolling mills 16 and 17 for rolling the material W into a predetermined product shape are provided. An intermediate winding area 8 is interposed between the intermediate row 4 and the finishing row 6, and the material W sent from the intermediate row 4 is selectively applied to one of the finishing rows 6 and 6 in the intermediate winding area 8. Winding devices 2 for feeding to
0, 20, 20, 20 are provided. Each winding device 20
Receives the material W sent from the intermediate row 4 at the speed VM, winds the material W once, and sets the wound material W at a speed VN that is set lower than the speed VM and corresponds to the receiving speed of the finishing row 6. To the finishing row 6, and the finishing row 6
A predetermined product is sent out at the speed VO.

Therefore, the rolling device 1 can cut off the direct correlation between the rolling speeds of the rough row 2 and the intermediate row 4 and the rolling speed of the finishing row 6 by the presence of the winding device 20. 2 and the sending speed VM of the intermediate row 4 and the introducing speed VN and the sending speed VO of the finishing row 6 can be set relatively freely. Thereby, while maintaining the introduction speed VI of the coarse row 2 at a predetermined speed, the cross-sectional shape of the material W introduced into the coarse row 2 is increased, or the material W introduced into the coarse row 2 is increased.
It is possible to increase the introduction speed VI of the coarse row 2 while maintaining the cross-sectional shape of the second row.

For example, a conventional rolling mill 100 shown in FIG.
Then, when the diameter of the strip having the final shape is set to 5.5 mm and the delivery speed Vo of the strip is set to 120 m / s, the cross-sectional shape of the material W in the rough row 2 is set to 180 mm square, The introduction speed Vi in column 2 is set to 0.09 m / s. On the other hand, according to the rolling device 1 of the present example, the diameter of the strip having the final shape, the feeding speed VO, and the introduction speed VI of the coarse row 2 are the same as those of the rolling device 100, that is, 5.5 mm, 120 m / s and 0.
When it is set to 09 m / s, the cross-sectional shape of the raw material W in the coarse row 2 can be set to a cross-sectional shape larger than that of the rolling device 100, for example, a 250 mm square. Further, when the diameter of the strip having the final shape, the feeding speed VO, and the cross-sectional shape of the material W in the rolling device 1 are set to the same conditions as those of the rolling device 100, the introduction speed VI of the coarse row 2 is set to
The speed can be set higher than 0, for example, 0.17 m / s. Thus, according to the rolling apparatus 1 of the present embodiment, a heavy material having a large cross-sectional shape is rolled due to discontinuity between the coarse row 2 and the intermediate row 4 and the finishing row 6, thereby increasing the product weight. In addition, the yield can be improved, and the rolling speed of the coarse row 2 and the intermediate row 4 can be increased.

According to the rolling device 1, the raw row W can be rolled by the non-twist rolling by the horizontal / vertical rolling mills 12, 13 and the horizontal / vertical rolling mills 14, 15 in the coarse row 2 and the intermediate row 4. In addition, twisting of the material W is avoided, and operations such as adjustment of the twist guide are omitted. Therefore, high-precision tension control is possible, and the production of high-quality strips with excellent dimensional tolerances and surface properties is achieved. Moreover, the horizontal / vertical arrangement of the rolling mills allows the use of compact rigid mills.

Further, since the rolling device 1 is configured to form the winding of the material W by the winding device 20, the material W is interposed between the coarse row 2, the intermediate row 4 and the finishing row 6. The temperature drop of the raw material W due to transient residence is suppressed to a minimum. The present invention is not limited to the embodiments described above, and various changes or modifications are possible, and it is understood that these are also included in the present invention within the scope of the invention described in the claims. Needless to say.

For example, in the above embodiment, the rolling device 1
Although two pairs of winding devices 20 corresponding to the two finishing rows 6 are provided, a single winding device configured to distribute the material W to each finishing row may be provided, or It is also possible to provide three or more finishing rows and a number of winding devices corresponding to each finishing row. Further, the winding device corresponding to one finishing row may include a plurality of winding drums.

[0044]

According to the above construction of the present invention, a strip hot rolling apparatus and a hot strip rolling apparatus capable of increasing the production of a strip by rolling a strip having a small diameter from a material having a large cross-sectional shape. It is possible to provide a cold rolling method. Further, according to the configuration of the present invention described in claims 2, 3, 8, and 9,
It is possible to provide a hot-rolling apparatus and a hot-rolling method for a strip capable of rolling a material by so-called non-twist rolling while securing a high production rate of the strip.

[Brief description of the drawings]

FIG. 1 is a schematic overall plan view showing a hot rolling apparatus according to the present invention.

FIG. 2 is a side view schematically showing a structure of a winding device.

FIG. 3 is a partially enlarged cross-sectional view showing a structure around a winding frame of the winding device.

FIG. 4 is a partial side view schematically showing a modification of the drive mechanism of the turntable.

FIG. 5 is a schematic flowchart showing a route of a material sent from an intermediate row.

FIG. 6 is a time chart schematically showing winding and unwinding times of the winding device.

FIG. 7 is a schematic overall plan view showing a conventional hot rolling apparatus.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Rolling apparatus 2 Rough rolling mill row (coarse row) 4 Intermediate rolling mill row (intermediate row) 6 Finish rolling mill row (finishing row) 12, 14, 16 Horizontal rolling mill 13, 15, 17 Vertical rolling mill W Material

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Claims (12)

(57) [Claims] 1. A first rolling mill row provided with a rolling mill for rolling a raw material introduced from a heating furnace, and a rolling mill rolling the raw material rolled by the first rolling mill row into a predetermined strip shape. A hot rolling apparatus for strips having a second rolling mill row provided with the first rolling mill row, receiving the raw material at a first speed corresponding to the feeding speed of the raw material, and winding the raw material. Times, corresponding to the introduction speed of the second rolling mill row and the first rolling mill.
At a second speed set lower than the speed, a winding device that sends the material from the winding of the material to the second rolling mill row,
A hot rolling apparatus for a strip material, which is provided between the first rolling mill row and the second rolling mill row. 2. The first rolling mill row includes a horizontal rolling mill and a vertical rolling mill that are arranged alternately and that rolls the material by single rolling, and the second rolling mill row includes a plurality of parallel rolling mills. The strip hot-rolling apparatus according to claim 1, wherein the strips are arranged. 3. The first rolling mill row includes a coarse row and an intermediate row, wherein the coarse row and the intermediate row each include an alternately arranged horizontal rolling mill and a vertical rolling mill, and The strip rolling machine according to claim 1 or 2, wherein the rolling train is constituted by a finishing train having alternately arranged horizontal rolling mills and vertical rolling mills. 4. A plurality of winding devices are provided between the first rolling mill row and the second rolling mill row, and each of the winding apparatuses is arranged in parallel with the plurality of first rolling mill rows. 4. The hot-rolling apparatus for strips according to claim 1, wherein the apparatus is arranged in series with each of the two rolling mill rows. 5. 5. A plurality of winding devices are arranged for one of the second rolling mill rows, and the winding device group winds the material alternately and unwinds the material alternately. Claim 4
2. A hot rolling apparatus for strip materials according to claim 1. 6. A material receiving / sending means for receiving a material at a high speed and sending it at a low speed;
The hot rolling apparatus for strip material according to any one of claims 1 to 5, further comprising a winding means for winding the material received via the sending means. 7. A strip material in which a material introduced from a heating furnace is rolled in a first rolling mill row, and a material rolled by the first rolling mill row is rolled into a predetermined strip shape in a second rolling mill row. The hot rolling method according to claim 1, wherein the first rolling mill row and the second rolling mill row are disposed between the first rolling mill row and the second rolling mill row.
The material delivered from the rolling mill train is received at a first speed corresponding to the feed speed of the material, forming a winding of the material, corresponding to the introduction speed of the second rolling mill train and the first speed. A hot rolling method for a strip material, wherein the material is sent from the winding of the material to the second rolling mill row at a second speed set to a lower speed. 8. The first rolling mill row has a horizontal rolling mill and a vertical rolling mill arranged alternately, and the material is rolled through the first rolling mill row by one thread. The hot rolling of a strip according to claim 7, wherein a plurality of two rolling mill rows are arranged in parallel, and the wound material is selectively fed to each second rolling mill row. Method. 9. The first rolling mill row includes a coarse row and an intermediate row, wherein the coarse row and the intermediate row each include an alternately arranged horizontal rolling mill and a vertical rolling mill, and The rolling train is constituted by a finishing train having alternately arranged horizontal rolling mills and vertical rolling mills, and the material is rolled by one through substantially all the steps. Item 7
Or the hot-rolling apparatus of the strip material of 8. 10. A winding device used in the hot rolling method for a strip according to any one of claims 7 to 9,
The material delivered from the first rolling mill train is received at a first speed corresponding to the delivery speed of the material, and is set to be lower than the first speed, corresponding to the introduction speed of the second rolling mill train. A winding device, comprising: a pinch roller for feeding the material to the second rolling mill row at the second speed, and a winding drum for winding the material received by the pinch roller. 11. The winding drum is oriented to wind the material around an axis extending in a vertical direction, and the pinch roller is oriented to rotate around an axis extending in a lateral direction. 2. A driving device for rotating the pinch roller at a variable speed is provided.
The winding device according to 0. 12. The winding device according to claim 11, wherein the winding drum includes a bottom plate that can be raised and lowered, and the bottom plate is rotatably supported.