JPH08294715A - Strip continuous casting/hot rolling heat treatment equipment and method thereof - Google Patents

Abstract

PURPOSE: To operate in good passability by arranging a steering device to guide a strip to line center and a strip passing position detector to a tension controller. CONSTITUTION: Meandering control and tension control of a strip 1 are executed by a rolling mill entry side bridle roll 39, rolling mill exit side pinch roll 45 and heat treatment furnace exit side pinch roll 46 for a hot rolling mill and heat treatment furnace 5. By detecting the strip 1 at the entry side/exit side of hot rolling mill 4 and the exit side of heat treatment furnace 5 by a rolling mill entry side strip end detector 47, rolling mill exit side strip end detector 48 and heat treatment furnace exit side strip end detector 49 of the strip 1, a rolling mill entry side bridle steering device 41, rolling mill exit side pinch roll steering device 60 and heat treatment furnace exit side steering device 61 are subjected to feedback control by steering controllers 57, 58, 59. The steering device, in the case of a pinch roll, executes centering of the strip 1 while gripping the center of strip 1 with the main body of pinch roll 50 and executing level-control by working side and driving side screw down devices 63.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention uses various materials (special materials such as ordinary steel, stainless steel, aluminum alloys and copper alloys) at a high speed (20 to 150 m / m) by, for example, a twin roll type continuous casting machine.
min)) and the resulting 2-6 mm thick ultra-thin slab slab is continuously hot-rolled at high temperature and high speed, and the plate thickness is 1-3 mm.
The present invention relates to a strip continuous casting hot rolling heat treatment facility and a strip continuous casting hot rolling heat treatment method capable of continuously heat treating the strip.

[0002]

2. Description of the Related Art In recent years, for example, in the field of iron and steel, in the case of manufacturing steel sheets, continuous casting hot rolling heat treatment process, etc., from the viewpoints of productivity improvement by reduction of process steps, equipment cost and reduction of heat intensity. The continuous strip hot casting process is used.

As this continuous casting hot rolling process,
As disclosed in JP-A-2-179343, a pinch roll is arranged on the downstream side of the casting machine, and a table and a winding device are arranged on the downstream side of the next hot rolling mill. Further, Japanese Patent Laid-Open No. 60-83745 discloses a strip continuous casting hot rolling facility in which a guide rail and multi-stage rolling rolls are arranged immediately below a casting machine.

On the other hand, in a normal continuous hot rolling line, a side guide is arranged on the inlet side of the hot rolling mill to center the strip. Further, in order to stabilize the sheet passing property of the hot rolling mill, the strip is 0.5 to 0.5 at the rolling mill entrance / exit side.
A tension of 1.5 kg / mm ² is applied.

However, in the case of strip continuous casting hot rolling equipment, when the strip is guided to the center by the inlet side guide of the hot rolling mill, it comes into contact with the fragile strip plate end and damages the plate end. The strip may break when it is bent or folded.

Therefore, the inlet side guide is often not provided, and the strip may be rolled off the center of the rolling mill. In this case, one side of the strip is greatly stretched, and the strip is rolled in the heat treatment furnace on the outlet side of the rolling mill. It may contact with the furnace wall due to meandering or catenary fluctuation, and may be damaged, or it may become impossible to pass the plate.

The tension applied to the strip in the continuous strip casting process is generated by the pulling force of the casting.
It has a low tensile strength (0.1 to 0.5 kg / mm ² ), and a high tensile strength (0.5 to 1.
5 kg / mm ² ) is necessary.

When strips are cast using a twin roll type continuous casting machine, the strip thickness is 10 in the casting length direction during the casting process.
A thick portion of 0 to 800 μm (hereinafter referred to as “hot band”) may occur accidentally and sharply (15 Hz or more). When rolling this hot band with a hot rolling mill,
The edge of the plate is well extended and the shape is wavy. Since this hot rolling is a low-speed high-load continuous rolling in synchronization with long-time continuous casting, the work rolls of the hot rolling mill are subjected to a severer heat load than continuous hot rolling, and its thermal expansion is It is 1.2 to 1.6 times that of the conventional one. Therefore, the hot-rolled strip has a defective shape.

[0009]

DISCLOSURE OF THE INVENTION The present invention has been proposed to solve the above-mentioned problems of the prior art in a strip continuous casting hot rolling facility (line). That is, while preventing the strip from meandering and improving the strip passing property, the hot band can be rolled without breaking the shape of the strip, and the shape change of the work roll is suppressed, so that the surface texture, the shape dimension, and the internal structure are reduced. The present invention provides a strip continuous casting and rolling heat treatment equipment and a strip continuous casting and rolling heat treatment method capable of stably and efficiently producing excellent strips of excellent quality.

[0010]

The first invention of the present invention is as follows:
In the strip continuous casting hot rolling heat treatment equipment, between the strip continuous casting machine and the hot rolling machine and between the hot rolling machine and the heat treatment furnace, a strip tension control device by bridle rolls or pinch rolls is arranged, A strip continuous casting hot rolling heat treatment facility, wherein the tension control device is provided with a steering device for guiding the strip to the center of the line and a strip threading position detector.

In a second aspect of the present invention, the project block of the hot rolling mill according to the first aspect has an increase bender servo unit and a depletion bender system has a pressure accumulator, thereby having a response of 20 Hz or more. A high-speed strip thickness profile control device, a strip thickness gauge on the inlet side of the hot rolling mill, and a hot band control device for calculating the amount of reduction necessary for rolling a uniform and flat strip. Continuous casting hot rolling heat treatment equipment.

A third aspect of the present invention is the hot rolling mill according to the first or second aspect, further comprising a slit laminar header, a roll cooling width varying device, and a strip profiler on the delivery side of the hot rolling mill. A strip continuous casting hot rolling heat treatment facility, which is provided with the roll cooling device.

A fourth aspect of the present invention is, in a strip continuous casting hot rolling heat treatment process, a strip formed by a bridle roll or a pinch roll between the strip continuous casting machine and the hot rolling mill and between the hot rolling mill and the heat treatment furnace. Is provided with a tension control device for detecting the threading position of the strip at the entrance side of the tension control device, and feeding back the detected value to the steering device to guide the strip to the center of the line. Continuous casting hot rolling heat treatment method.

In a fifth aspect based on the fourth aspect, the strip thickness gauge on the inlet side of the hot rolling mill detects the strip thickness and position of the strip thickness abnormal portion to eliminate the abnormal strip thickness. A strip continuous casting hot rolling heat treatment method, characterized in that a required reduction amount and a shape control amount are calculated, and the material is fed forward to a high-speed sheet thickness shape control device to rapidly reduce an abnormal portion of the sheet thickness to perform high-speed shape control.

A sixth invention is the slit laminator according to the fourth invention or the fifth invention, wherein the detection value of the strip shape meter on the delivery side of the hot rolling mill is fed back to the roll cooling device to control the cooling width varying device. A strip continuous casting hot rolling heat treatment method, characterized in that a roll cooling width by a cooling water flow from a header is controlled to control thermal expansion in a roll width direction to improve shape controllability of a hot rolling mill.

[0016]

According to the present invention, the hot rolling mill disposed downstream of the strip continuous casting machine and the pinch roll or bridle device on the inlet / outlet side of the heat treatment furnace are provided so that the strip can be removed in the hot rolling mill and the heat treatment furnace. Stable operation that does not meander can be achieved. By connecting the high-speed plate thickness control device and the shape control device having the same responsiveness to the project block of the hot rolling mill, the hot band can be rolled without breaking the shape of the strip. By providing the slit cooling type variable width roll cooling device in the hot rolling mill, it is possible to improve the influence on the shape control due to the thermal expansion of the work roll exposed to the low speed and high heat load.

With the above effects, a strip continuous casting hot rolling heat treatment facility (line) in which a hot rolling mill and a heat treatment furnace are disposed downstream of the strip continuous casting facility is realized, and the surface texture, shape and internal structure are It is possible to stably and efficiently manufacture good quality strips.

The present invention will be described in more detail below. In the first invention and the fourth invention of the present invention, in order to prevent the strip from meandering in the aspect of sheet passing, a line tension by a bridle roll or a pinch roll is provided between the hot rolling mill and the heat treatment furnace described above. Installed a controller, tension of strip continuous casting machine (0.1-0.5kg / mm ² ) and tension of hot rolling mill (0.5-1.5kg / mm ² ) and inside furnace of heat treatment furnace The magnitude of tension (0.1 to 0.5 kg / mm ² ) can be changed.

Further, a sensor for detecting the strip passing position is arranged on each entrance side of the bridle roll or the pinch roll arranged between the continuous strip casting machine and the hot rolling mill and between the hot rolling mill and the heat treatment furnace. It is possible to guide the strip to the center of the line by feeding back the signal of the detected value to the steering device of the bride roll or pinch roll.

In the second and fifth aspects of the present invention, the high-speed plate thickness control device is provided so that the hot band portion of the strip can be operated by the high-speed (20 Hz or more) hydraulic reduction device of the hot rolling mill. 100 to 800 μm) can be rolled down at a high speed. If the bender cannot be controlled at high speed by following the rolling load generated, the roll bending of the hot rolling mill becomes large, the strip width end of the strip is strongly pressed, and the strip width end becomes wavy.

By arranging the bender servo unit of the hot rolling mill in the project block, the hydraulic pipe length is kept within 0.5 m to reduce the hydraulic pipe pressure loss, and the pipe expansion is performed by forming the pipe hole in the project block. By increasing the pressure of the incrementer bender and arranging a pressure accumulator to absorb the increment of oil quantity with high response in the piping of the Decrees side, the response is improved and high speed according to rolling load fluctuation Control (20 Hz and above) can be achieved.

Further, since the hot band cannot be predicted, a plate thickness gauge for detecting a change in plate thickness is arranged on the entrance side of the rolling mill so that the rolling band can be kept within a predetermined thickness deviation. The abnormal plate thickness signal can be tracked and reduced in consideration of the variation in plate thickness. By controlling the bending of the rolling roll with a high-speed bender according to the change in rolling load predicted by the hot band reduction, it is possible to prevent the strip shape from being disturbed.

In the third and sixth aspects of the present invention, a high heat transfer coefficient can be achieved by using a slit laminar type cooling device. Further, the cooling width can be continuously changed so that the central portion of the roll which is contact-heated by the strip pressure in the roll width direction can be intensively cooled. The place where centralized cooling is 4
A high heat transfer coefficient of 0000 kcal / hr / m ³ or more can be achieved.
Further, by feeding back the detection value of the strip shape meter on the outlet side of the hot rolling mill to change the roll cooling width and performing roll thermal expansion control, it is possible to improve the strip shape and prevent roll roughening. .

[0024]

【Example】

(Embodiment 1) An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 shows a continuous strip hot casting machine in which a twin roll type continuous strip casting line is provided with a hot rolling mill 4 having a work roll 4w and a backup roll 4b and a horizontal heat treatment furnace 5 (hereinafter referred to as "heat treatment furnace"). The structural example of rolling heat treatment equipment is shown. The atmosphere is controlled up to the heat treatment furnace entrance side by the twin roll under adiabatic atmosphere seal cover 3 and the hot rolling mill adiabatic degassing seal cover 38 to suppress scale generation and reduce heat loss to save energy.

Between the hot rolling mill 4 and the heat treatment furnace 5, a rolling mill inlet side pinch roll 44 and a rolling mill outlet side pinch roll 45 are provided.
Is provided, the tension control of the twin roll type continuous casting machine 2 and the hot rolling mill 4 and the steering of the strip on the inlet side of the hot rolling mill 4 are possible. With one pinch roll 44 on the rolling mill entrance side,
When it is difficult to secure the tension on the inlet side of the hot rolling mill due to the friction coefficient between the strips, the tension may be generated by two and the meandering control may be performed at the same time.

The strip after the heat treatment is cooled by the cooling device 6, wound on the winder mandrel 8 and commercialized as a strip coil 9. In the figure, 10 is a pinch roll before the cutting machine 11, and 7 is a pinch roll before the winder.

FIG. 2 shows a structural example of a continuous casting hot rolling heat treatment facility in which a hot rolling mill 4, a vertical heat treatment furnace 40, and a rolling mill entrance side bridle roll 39 are arranged in a strip continuous casting line. Since the tension of the vertical heat treatment furnace 40 cannot obtain the tension required downstream of the hot rolling mill 4 due to the catenary loop control, between the hot rolling mill 4 and the vertical heat treatment furnace 40,
On the exit side of the vertical heat treatment furnace 40, the rolling mill exit side pinch roll 4
5 and the heat treatment furnace 5 outlet side pinch roll 46 are arranged.

FIG. 3 shows the meandering control and the tension control of the strip 1 by means of the bridle roll 39 on the rolling mill entrance side to the hot rolling mill 4 and the heat treatment furnace 5, the pinch roll 45 on the rolling mill exit side, and the pinch roll 46 on the heat treatment furnace exit side. Shows an example of steering structure and an example of control system configuration.

As shown in FIG. 3, the rolling mill inlet side plate edge detector 47, the rolling mill outlet side plate edge detector 48 of the strip 1 are provided on the inlet and outlet sides of the hot rolling mill 4 and the outlet side of the heat treatment furnace 5, respectively. Detected by the heat treatment furnace exit side plate end detector 49, the rolling mill front bridle steering device 41, the rolling mill exit side pinch roll steering device 60, the heat treatment furnace exit side pinch roll steering device 61 are respectively provided with steering control devices 57,
Feedback control is performed at 58 and 59.

In this steering device, in the case of a pinch roll, the center of the strip 1 is gripped by the main body of the pinch roll 50 as shown in FIG.
The stripping device 63 is centered by performing leveling control by the work side and drive side reduction devices 63. 62 in the figure
Is a pinch roll driving device. In the case of the rolling mill entry side bridle roll 39, as shown in FIG. 4A, the main body of the bridle roll 51 near the entry side of the hot rolling mill 4 is connected to the other bridle roll axis (the steering pivot shaft 4).
Centering is performed by swinging around 3).

FIG. 5 shows an example of a steering structure in the heat treatment furnace by the heat treatment furnace exit side bridle roll 53 and the rolling mill exit side bridle roll 52. FIG. 6 shows a layout configuration of high-speed servo benders, and FIG. 7 shows a configuration example of a hot band rolling control system.

As shown in FIGS. 6 (a) and 6 (b), in order to roll the hot band 26 which occurs unsteadily within the predetermined thickness tolerance range (within ± 100 μm) of the hot rolling strip 1, 20 Hz or more is required. It is equipped with a highly responsive hydraulic pressure reduction device 13. Further, the bender servo unit 17 is arranged in the project block 19, and the hydraulic pipe 21 of the cylinder 20 which is controlled by the bender hydraulic control device 23 and supplies the hydraulic pressure via the hydraulic unit 22 is the project block 1.
It is possible to suppress the influence of the expansion change of the hydraulic pipe 21 by forming a manifold in 9 and making the length within 0.5 m. In the figure, 12 is a rolling mill housing.

Backup roll 15 vendor (DE
(C) By installing the pressure accumulator 54 in the hydraulic pipe 21 on the Declease side without changing the setting of 18, the bender (IN
C) By absorbing the pressure increase of 14 and the increment of oil quantity with high response, it is possible to achieve highly responsive shape control of 20 Hz or more. Of course, this can also be achieved by disposing the bender servo unit 17 of the bender (DEC) 18 within 0.5 m.
In addition, the bender (D
This can be achieved at a low cost by using a proportional solenoid valve without arranging the EC) 18.

As shown in FIG. 7, a strip thickness gauge 24 on the inlet side of the rolling mill is arranged on the inlet side of the hot rolling mill 4 to detect the thickness of the hot band 26 and the position in the strip length direction which occur unsteadily. Then
The hot band controller 42 calculates a shape control amount (bender pressure) corresponding to the required reduction amount and the predicted rolling load variation amount, and feeds this value to the hot rolling mill 4 to feed the hot band 26. The part can be rolled down without disturbing the shape. In the figure, 37 is a strip shape meter for measuring the shape of the strip after rolling.

FIG. 8A shows a slit laminar header 28 of a slit laminar type cooling device of a cooling device for cooling the work roll 4w of the hot rolling mill 4 and an example of its arrangement. In this slit laminar type cooling device,
Even if the original water pressure is at the level of 30 kg / cm ² , the water quantity density can be increased compared to the conventional spray method, so that the work roll 4w of the hot rolling mill subjected to a low cycle high heat load can be cooled. In the drawing, 27 is a roll cooling water waterproof plate.

FIG. 8B is a perspective view showing a cooling operation state (slit laminar header 28, slit plate 29, cooling water flow 35) by the slit laminar type roll cooling device. The distance a between the slit plates 29 is about 4 to 8 mm. The pipe diameter of this slit laminar header 28 is 80-
It is 150 mm. Water pressure is slit laminar header 28
10 to 50 kg / cm ² on the entry side of.

FIG. 9 shows a method of changing the cooling width by the cooling water from the slit 29. As shown in FIG. 9, there is a pressure water wp introduction hole in the center of the slit laminar header 28, and a cooling structure that has a nut structure on both sides in the width direction of the slit 29 and is slidable inside the slit laminar header 28. A change partition plate 32 is provided.

The cooling width changing partition plate 32 is screwed with the cooling width changing screw 31, and the rotation of the cooling width changing screw 31 is stopped by the partition plate rotation prevention key 33 and the cooling width changing screw 31 is rotated by the cooling width changing device 30. As a result, the slits 29 are slid to evenly open and close with the width center of the slit 29 as a boundary.

FIG. 10 shows the arrangement of a cooling rectifying plate 34 made of stainless steel for rectifying the cooling water flow 35 from the slit 29 to the work roll 4w. The cooling water flow 35 from the slit 29 has a curtain shape and does not spread like a spray on the surface of the work roll 4w. Therefore, the cooling straightening plate 34 (slit laminar header side vertical angle 5
(About 20 degrees) to increase the wetting range of the cooling water flow so that the cooling region of the work roll 4w can be expanded.

FIG. 11 shows an example of the control system configuration of the cooling width of the work roll 4w by the cooling width changing device 30. The shape meter 37 is arranged on the exit side of the hot rolling mill 4, and the cooling width changing device 30 is controlled via the cooling width control device 36 according to the detection value of the strip shape meter on the exit side. The shape of the strip can be controlled by controlling the width of the cooling water flow 35 to control the widthwise cooling region of the work roll 4w and changing the thermal expansion in the radial direction of the work roll 4w. For example, as shown in FIG.
If the strip 1 is in the middle stretched state because w is a drum shape, the roll cooling width changing device 30 enhances the cooling of the center of the work roll 4w and suppresses the thermal expansion of the work roll 4w, as shown in FIG. 12B. Thus, it is possible to suppress the middle elongation of the strip 1 and roll it into a strip having a high plate thickness uniformity.

(Embodiment 2) A meandering control and tension control structure as shown in FIG. 3 is provided, and a plate thickness control as shown in FIG.
Using a twin roll-type strip continuous casting hot rolling heat treatment equipment capable of carrying out the first to sixth inventions of the present invention, which are configured with a work roll shape control structure as shown in FIG. First, a continuous casting machine was used to continuously cast a thin slab of stainless steel having a plate thickness of 2 to 6 mm and a plate width of 700 to 1350 mm at a casting speed of 20 to 150 m / min.
A thin slab of stainless steel at 0 to 1100 ° C. is hot-rolled by a hot rolling mill at a reduction rate of 10 to 40% to produce a stainless steel strip of 1.5 to 3 mm.
After heat treatment at 00 to 1150 ° C for 4 to 10 seconds, it was cooled to 500 to 550 ° C at a cooling rate of 20 to 60 ° C / sec and wound.

The frequency of occurrence of hot bands is about 100.
The number of times / 400t (7 continuous castings). During this period, the first invention to the sixth invention of the present invention were simultaneously carried out to perform meandering control, tension control, plate thickness control (hot band control), and work roll shape control.

As a result, during hot rolling and heat treatment, meandering of the thin slab and strip is well suppressed, the strip edge does not contact the furnace wall of the heat treatment furnace, and the sheet thickness is within the allowable tolerance. In addition, defective products such as poor shape and rough skin were not observed.

On the other hand, when the meandering control and the tension control are not performed, the meandering is performed at about 10 m after casting,
Since the side edge of the strip contacted the furnace wall of the heat treatment furnace and caused a strip failure, the casting operation was stopped. Further, when the meandering control and the tension control were performed but the hot band control was not performed, the plate thickness control and the work roll shape control were not sufficient, and the amount that needed to be cut as a crop increased by about 1%. Then, when the meandering control, the tension control, the hot band control are performed and the work roll shape control is not performed, it becomes difficult to stably maintain the shape control after casting for 3 hours.
Since there was a possibility that the strip would be defective in shape, the casting operation was stopped after 3 hours of casting.

From the above results, the first and fourth inventions of the present invention which only perform the meandering control and the tension control can improve the conventional example in which the meandering control and the tension control are not performed.
As in the second, third, fifth, and sixth inventions, it is confirmed that the quality and shape are further improved by controlling the plate thickness and the shape of the work roll. Was done.

The present invention is not limited to the above-mentioned embodiments, and each equipment element necessary for constructing the present invention is within the scope of satisfying the configurations of claims 1 to 6 of the present invention. The structure, mechanism, arrangement, number of arrangements, size, shape, operating conditions, etc. are changed according to the manufacturing target and operating conditions. In addition to stainless steel, general steel, copper, aluminum, alloys containing these as main components, and the like are the objects of manufacture in the present invention.

[0047]

According to the present invention, the hot rolling mill and the pinch roll or bridle device at the inlet / outlet side of the heat treatment furnace are arranged downstream of the continuous strip casting machine, so that strips are formed in the hot rolling machine and the heat treatment furnace. Stable operation that does not meander can be achieved. By having the high-speed plate thickness control device and the shape control device having the same responsiveness as this, the hot band can be rolled without breaking the shape of the strip. The slit cooling variable width roll cooling device can improve the influence on the shape control due to the thermal expansion of the work roll exposed to the low speed and high heat load. With the above effects, the hot rolling mill and the heat treatment furnace can be arranged downstream of the strip continuous casting equipment. As a result, it is possible to reduce manufacturing costs and stably supply products of good quality.

[Brief description of drawings]

FIG. 1 is a schematic side view showing an arrangement example of a strip continuous casting hot rolling heat treatment facility of the present invention including a horizontal heat treatment furnace of a strip continuous casting hot rolling line and a tension control device using a pinch roll.

FIG. 2 is an explanatory view showing an arrangement example of the strip continuous casting hot rolling heat treatment equipment of the present invention, which is provided with a vertical heat treatment furnace of a strip continuous casting hot rolling line, and is equipped with a tension control device by pinch rolls and bridle rolls.

FIG. 3 is a side view outline diagram showing an outline of a configuration example of a pinch roll and bridle steering device and its control system configuration in the strip continuous casting hot rolling heat treatment facility shown in FIG.

4 is a schematic side view showing a structural example of a steering device in the strip continuous casting hot rolling heat treatment equipment of the present invention shown in FIG. 3, FIG. 4 (a) shows a steering structure example using a bridle roll, and FIG. ) The figure shows an example of steering structure using pinch rolls.

FIG. 5 is a schematic diagram showing an example of the configuration of a steering system and its control system when the strip continuous casting hot rolling heat treatment equipment of the present invention is provided with a tension control device by bridle rolls on the hot rolling mill inlet side and the heat treatment furnace inlet / outlet side. FIG.

FIG. 6 is a front explanatory view showing an outline of a configuration example of a high-speed increase bender of a hot rolling mill in a strip continuous casting hot rolling heat treatment facility of the present invention, and FIG. 6 (a) is an overall structural example and its control system configuration. Explanatory drawing which shows an example outline, (b) figure is a partial expanded explanatory view of the hydraulic pressure supply system in (a) figure.

FIG. 7 is an explanatory side view showing an outline of a hot band rolling control system configuration example in the hot rolling mill of the strip continuous casting hot rolling heat treatment facility of the present invention.

FIG. 8 is an explanatory view showing an outline of an example of a roll cooling device of a hot rolling mill of a strip continuous casting hot rolling heat treatment equipment of the present invention, FIG. 8A shows an example of arrangement of slit laminar headers with respect to rolls, and FIG. FIG. 3A is a three-dimensional explanatory diagram showing an outline of a configuration example of the slit laminar header of FIG.

9 is a front cross-sectional explanatory view showing an example of the structure for changing the width of the cooling water flow in the slit laminar header shown in FIG.

10 is a side cross-sectional explanatory view showing an outline of an example of a rectifying structure of a cooling water flow from the slit laminar header shown in FIGS. 8 and 9. FIG.

FIG. 11 is a side explanatory view showing an outline of a configuration example of a width control system of a cooling water flow from the slit laminar header shown in FIGS. 8 to 10 to a roll.

12 is an explanatory view of a roll cooling width (cooling zone) controlled by the cooling water flow width control system of FIG. 11.

[Explanation of symbols]

 1 strip 2 twin-drum type continuous casting machine 3 twin-drum lower insulating atmosphere seal cover 4 hot rolling mill 4b backup roll 4w work roll 5 horizontal heat treatment furnace 6 cooling device 7 winder front pinch roll 8 winder mandrel 9 winder Coil 10 Cutting machine front pinch roll 11 Cutting machine (shear) 12 Rolling machine housing 13 Hydraulic reduction device 14 Increas bender (INC) 17 Bender servo unit 18 Decrees bender (DEC) 19 Project block 20 Bender hydraulic cylinder 21 Bender hydraulic piping 22 Bender hydraulic unit 23 Bender hydraulic control device 24 Rolling mill entrance side plate thickness gauge 25 Hydraulic reduction control device 26 Hot band 27 Roll cooling water waterproof plate 28 Slit laminar header 29 Slit plate 30 Cold Width changing device 31 Cooling width changing screw 32 Cooling width changing partition plate (built-in nut) 33 Partition plate rotation prevention key 34 Cooling straightening plate 35 Cooling water flow 36 Cooling width changing control device 37 Strip shape meter 38 Rolling machine heat insulation de-air seal cover 39 Bread roll on entry side of rolling mill 40 Vertical heat treatment furnace 41 Bridle steering device in front of rolling mill 42 Hot band controller 43 Steering pivot shaft 44 Rolling machine entry side pinch roll 45 Rolling mill exit side pinch roll 46 Heat treatment furnace exit side pinch roll 47 Rolling mill inlet side plate edge detector 48 Rolling mill outlet side plate edge detector 49 Heat treatment furnace outlet side plate edge detector 50 Pinch roll body 51 Bridle roll body 52 Rolling machine outlet side bridle roll 53 Heat treatment furnace outlet side bridle roll 54 Accumulation pressure Vessel 55 Rolling Machine Outlet Bridle Roll Station Ring device 56 Steering device for heat treatment furnace exit side 57 Steering control device for rolling mill entrance side 58 Steering control device for rolling mill exit side 59 Heat treatment furnace exit side steering control device 60 Rolling mill exit side pinch roll steering device 61 Heat treatment furnace exit side pinch roll steering device Device 62 Pinch roll drive device 63 Pinch roll reduction device

Claims (6)

[Claims] 1. A strip tension control device using a bridle roll or a pinch roll between a strip continuous casting machine and a hot rolling mill, and between a hot rolling mill and a heat treatment furnace in a strip continuous casting hot rolling heat treatment facility. And a steering device for guiding the strip to the center of the line and a strip passage plate position detector are provided in the tension control device. 2. A high-speed plate thickness profile controller having a response of 20 Hz or more by having an increase bender servo unit in a project block of the hot rolling mill and a pressure accumulator in a decreas bender system, 2. A strip continuous casting hot work according to claim 1, wherein a strip thickness gauge on the inlet side of the hot rolling mill and a hot band control device for calculating a reduction amount necessary for rolling a uniform and flat strip are provided. Rolling heat treatment equipment. 3. The hot rolling mill is provided with a roll cooling device having a slit laminar header, a roll cooling width varying device, and a strip shape meter on the delivery side of the hot rolling mill. The strip continuous casting hot rolling heat treatment equipment according to 1 or 2. 4. A strip tension control device using a bridle roll or a pinch roll between a strip continuous casting machine and a hot rolling mill and between a hot rolling mill and a heat treatment furnace in a strip continuous casting hot rolling heat treatment process. The strip continuous casting hot work is characterized in that the strip passing position is detected on the inlet side of the tension control device, and the detected value is fed back to the steering device to guide the strip to the center of the line. Rolling heat treatment method. 5. The thickness gauge on the inlet side of the hot rolling mill detects the thickness and position of the strip thickness abnormal portion, and calculates the reduction amount and shape control amount necessary to eliminate the abnormal thickness. 5. The strip continuous casting hot rolling heat treatment method according to claim 4, further comprising feed-forwarding to a high-speed sheet thickness shape control device to rapidly reduce the abnormal sheet thickness to perform high-speed shape control. 6. The roll is controlled by feeding back a detection value of a strip shape meter on the outlet side of the hot rolling mill to a roll cooling device to control a cooling width varying device and controlling a roll cooling width by a cooling water flow from a slit laminar header. The strip continuous casting hot rolling heat treatment method according to claim 4 or 5, wherein the thermal expansion in the width direction is controlled to improve the shape controllability of the hot rolling mill.