JP2004050218A - Equipment for manufacturing steel strip - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a steel strip manufacturing equipment in which the equipment cost and running cost are reduced by devising the equipment so that it is enough to provide each one set of a coiler, a winding device, a coil taking-out device and a related device respectivity thereby making the equipment in a compact form. <P>SOLUTION: This equipment is provided with a continuous casting machine 1 in which molten metal 4 is fed from a tundish 3 arranged in the upper part and which has casting rolls 1a and 1b having a diameter of 300-500mm for continuously casting the steel strip 6 having a prescribed width, a rolling mill 8 installed on the downstream side of the continuous casting machine 1 and a coiler 16 in which winding drums 18 and 19 for winding the steel strip 6 are switched by rotating the winding drums 18 and 19 installed on the downstream side of the rolling mill 8 by taking an intermediate shaft 33 as a reference. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a strip manufacturing facility.
[0002]
[Prior art]
As a device for rolling a thin strip cast by a continuous casting machine with a rolling mill and winding it around a winding machine, there is, for example, one disclosed in Japanese Patent Application Laid-Open No. 10-2904. In the equipment disclosed in this publication, a plate cast by a mold-type continuous casting machine is a large single-weight slab. Therefore, two winding machines are provided at the most downstream, and these two winding machines are used. The winding of the plate is performed alternately, and the coil formed by the winding needs to be taken out by a coil car installed corresponding to each winding machine.
[0003]
FIG. 12 shows an example of a facility in which a thin slab cast by a twin-roll type continuous casting machine is rolled by a rolling mill and alternately wound by two winders. ing.
[0004]
In the figure, reference numerals 1a and 1b denote a pair of front and rear casting rolls which are arranged horizontally in parallel so that the opposite sides can rotate downward, and the casting rolls 1a and 1b are cooled by flowing a cooling fluid therein. It has become. Thus, the continuous casting machine 1 is formed by the casting rolls 1a and 1b.
[0005]
Reference numeral 2 denotes a casting metal nozzle arranged above a pool formed between the casting rolls 1a and 1b, and 3 a tundish arranged above the casting metal nozzle 2 to supply the molten metal 4 to the casting metal nozzle 2. Reference numeral 5 denotes a side weir arranged on both sides in the axial direction of the casting rolls 1a and 1b so as to abut against end faces of the casting rolls 1a and 1b to prevent the molten metal 4 from leaking from the pool. Cast strips (hereinafter simply referred to as strips) formed by cooling by 1a and 1b, and 7 are pinch rolls disposed below the casting rolls 1a and 1b to pull out the strips 6.
[0006]
8 is a rolling mill installed downstream of the pinch roll 7 for rolling the strip 6, 9 is a drum type cutting machine installed downstream of the rolling mill 8 for cutting the rolled strip 6, Reference numeral 10 denotes a pinch roll installed downstream of the cutting machine 9, 11 denotes a winding drum of a down-coiler-type winder on the upstream side that winds the strip 6 fed from the pinch roll 10, and 12 denotes a downstream of the pinch roll 10. The installed pinch roll, 13 is a winding drum of a down-coiler type winder on the downstream side that winds the strip 6 fed from the pinch roll 12, and 14 is until the strip 6 is wound several times on the winding drum 11. A winding device provided with a wrapper roll for winding the band plate 6 around the winding drum 11. The winding device 15 winds the band plate 6 until the band plate 6 is wound several times around the winding drum 13. This is a winding device provided with a wrapper roll for winding around the body 11.
[0007]
The molten metal 4 supplied from the tundish 3 to the casting metal nozzle 2 is supplied from the casting metal nozzle 2 to the pool, cooled and solidified by the casting rolls 1a and 1b rotating in the direction of the arrow to form a solidified shell. Grows and the strip 6 is cast. Thus, the strip 6 pulled out by the pinch roll 7 is fed to a rolling mill 8 and rolled by the rolling mill 8 so that the cross-sectional shape becomes a good flat shape. It is wound on a winding drum 11 of a take-up machine.
[0008]
When the strip 6 is wound on the winding drum 11 to form a coil 6 'having a predetermined diameter, the cutting machine 9 is rotated in the direction of the arrow to cut the strip 6, and the preceding strip 6 is cut. The subsequent strip 6 is guided by a switched guide (not shown), fed through the pinch roll 10 to the pinch roll 12 side, and wound from the pinch roll 12 to the winding drum 13 of the winding machine on the downstream side. Taken.
[0009]
The coil 6 ′ wound by the winding drum 11 is removed from the winding drum 11 and transported to another process by a coil car.
[0010]
[Problems to be solved by the invention]
In the equipment shown in Japanese Patent Application Laid-Open No. 10-2904 and the equipment shown in FIG. 12, the band plate 6 is alternately switched and wound around the winding drums 11 and 13. Two coil take-out devices such as the attaching devices 14 and 15 and a coil car are required, and two other devices related to the output side winding process are also required. Therefore, in any case, the conventional equipment is increased in size, and the equipment cost and the operation and maintenance cost are high.
[0011]
In view of such circumstances, the present invention reduces the equipment cost and the operation and maintenance cost by making it possible to provide a winding machine, a winding device, a coil extraction device, and related devices one by one. The purpose is to provide a strip manufacturing facility.
[0012]
[Means for Solving the Problems]
The strip manufacturing equipment according to claim 1 is a continuous caster provided with a twin roll or a single roll for continuously casting a strip having a predetermined width by supplying a molten metal from a tundish arranged at an upper part thereof, It is possible to switch between one or two rolling mills installed on the downstream side and a winding cylinder installed on the downstream side of the rolling mill and winding the strip by moving two winding cylinders. It is equipped with a winding machine.
[0013]
According to a second aspect of the present invention, the twin plate or single roll has a diameter of 300 mm to 800 mm, and in the third aspect of the present invention, the winding machine is a carousel reel. The strip manufacturing equipment is provided with a moving body on which the winding machine can reciprocate and two winding drums mounted on the moving body. The apparatus for manufacturing a strip plate according to claim 6, further comprising a winding device for winding the strip plate around the winding drum so that the strip plate does not loosen from the winding drum up to several turns. The winding device is a belt wrapper. .
[0014]
According to the strip manufacturing equipment of the present invention, the winding equipment such as a winder and a belt wrapper, the coil unloading equipment such as a coil car, and other related devices may be provided one by one, so that the entire equipment becomes compact. In addition, equipment costs and operation and maintenance costs can be reduced.
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
1 to 10 show an example of an embodiment of the present invention. In the drawing, the components denoted by the same reference numerals as those in FIG. 12 represent the same components, and the features of this illustrated example are that the diameter of the casting roll is 300 mm to 800 mm, the carousel reel is used as a winding machine, and the winding device is used. In that a belt wrapper is used. In the figure, 16 is a carousel reel type winder for winding the band plate 6, and 17 is a band plate from the start of winding to several turns when the band plate 6 is wound on the winder 16. A belt wrapper for winding the belt 6 around the winding drum 18 or 19 of the winding machine 16, and a coil car 20 for conveying a coil 6 ′ formed by winding the strip 6 by the winding machine 16. is there.
[0016]
In general, in the winding of a thin strip cast, it is possible to wind a belt wrapper. For example, if a mobile winder such as a carousel reel is used, a winding device and a coil unloading device such as a coil car can be used. And the outgoing side winding device associated therewith may be provided one by one.
[0017]
On the other hand, a strong material such as stainless steel is difficult to be wound by a belt wrapper, so that it is necessary to reduce the thickness of the plate. According to the study by the inventors, it has been found that continuous casting of a strip having a thickness of 2 mm or less is possible if the casting roll has a diameter of about 500 mm, so by providing one or two rolling mills downstream. Therefore, a compact continuous strip manufacturing facility can be manufactured.
[0018]
The reason why the diameter of the casting rolls 1a and 1b is set to 300 mm to 800 mm in the illustrated example is as follows. That is, the thickness h (see FIG. 5) of the casting rolls 1a and 1b on the exit side of the strip 6 cast by the casting rolls 1a and 1b is determined by [Equation 1].
[0019]
(Equation 1)
h = 2Kp (t) ^1/2
[0020]
Here, Kp is a solidification coefficient, and t is a contact time between the casting rolls 1a and 1b and the solidified shell 6s. [Equation 1] is represented as [Equation 2].
[0021]
(Equation 2)
h = 2Kp (Rθ / V) ^1/2
[0022]
Here, R is the radius of the casting rolls 1a and 1b, V is the casting speed, and θ is the contact arc length of the solidified shell 6s.
[0023]
As is clear from [Equation 2], it can be seen that the smaller the radius R of the casting rolls 1a and 1b, the smaller the exit side plate thickness h of the casting rolls 1a and 1b. Thus, the present inventors have experimentally found that the casting rolls 1a and 1b should have a diameter of 300 mm to 800 mm in order to cast the strip 6 of h = about 2 mm.
[0024]
An example of the configuration of the rolling mill 8 used in the illustrated example is shown in FIG. 6, in which 21a and 21b are upper and lower work rolls, and 22a and 22b are upper and lower holding rolls. The upper and lower work rolls 21a and 21b are configured so as to be able to shift by the same amount along the axis in the opposite direction, or may be individually shiftable in the arbitrary direction by the arbitrary amount of the shift in the axial direction. It is configured. The upper and lower work rolls 21a and 21b are composed of cylindrical barrel portions 23a and 23b and tapered tapered portions 24a and 24b whose diameters become smaller as they move away from the barrel portions 23a and 23b in the axial direction. Thus, the tapered portions 24a, 24b face in opposite directions with respect to the axial direction. Reference numeral 6a denotes a repellent convex portion formed at the width end of the band plate 6. Although not shown at the width end of the strip 6, a concave shape defect may occur.
[0025]
Next, details of the carousel reel type winder 16 will be described with reference to FIGS. 1 and 7 to 10. That is, the cylindrical housing 25 is rotatably supported by the base 26 via the bearing 27 and is configured to be rotated by a motor (not shown). The lower portion of the housing 25 is rotatably supported by a plurality of rollers 28 installed on a base 26.
[0026]
Two winding drum shafts 29, 30 arranged in parallel are rotatably supported on the housing 25, and these winding shafts 29, 30 protrude from one side surface of the housing 25 at the ends described above, respectively. The winding drums 18 and 19 are fixed. Further, pinions 31 and 32 are fixed to portions of the winding drum shafts 29 and 30 in the housing 25 so as to be located at opposite positions in the housing 25, respectively.
[0027]
Further, an intermediate shaft 33 serving as a rotation center of the housing 25 is disposed in the housing 25 so as to be positioned in parallel with the winding shafts 29 and 30 and between the winding shafts 29 and 30. The gears 34, 35 meshing with the pinions 31, 32 are rotatably supported via bearings 36, 37, respectively. The axes of the winding shafts 29 and 30 and the intermediate shaft 33 extend in the width direction of the band plate 6 in a plan view, and the winding drums 18 and 19 advance the band plate 6 with the intermediate shaft 33 interposed therebetween. They are arranged at predetermined intervals in the direction.
[0028]
A clutch gear inner pipe 38 is fixed to the intermediate shaft 33 so as to be located between the gears 34 and 35, and a gear clutch 39 slides on the outer periphery of the clutch gear inner pipe 38 in the axial direction of the intermediate shaft 33. Are fitted so that When the gear clutch 39 is disengaged from the splines formed on the outer periphery of the bosses of the gears 34 and 35, the rotation of the intermediate shaft 33 is transmitted to one of the gears 34 and 35 or cut off. It is supposed to.
[0029]
The end of the intermediate shaft 33 opposite to the winding drums 18 and 19 is directly connected to the output shaft 40a of the main motor 40. The end of the winding drum shafts 29 and 30 opposite to the winding drums 18 and 19 is Projecting to a position where it can be connected to an output shaft 43a of a speed reducer 43 for transmitting the power of an auxiliary motor 42 via a gear clutch 41.
[0030]
A belt wrapper 17 installed as a wrapping device near the winder 16 holds the band plate 6 on the winding drums 18 and 19 for several turns after the winding of the band plate 6 on the winding drums 18 and 19 starts. An endless drivable belt 44 for winding is provided, and a driving device 45 for moving a pressing surface of the belt 44 toward and away from the winding drums 18 and 19 is provided. Further, the coil car 20 runs along the rail 46 in the axial direction of the winding drums 18 and 19, and can take out the wound coil 6 '. In addition, 47 is a guide plate of the band plate 6.
[0031]
Next, the operation of the illustrated example will be described.
The molten metal 4 supplied from the tundish 3 to the casting metal nozzle 2 is supplied from the casting metal nozzle 2 to the pool, cooled and solidified by the casting rolls 1a and 1b rotating in the direction of the arrow to form a solidified shell. Is grown to cast a strip 6 having a thickness of about 2 mm. Thus, the strip 6 pulled out by the pinch roll 7 is fed to a rolling mill 8 and rolled by the rolling mill 8 so that the cross-sectional shape becomes a good flat shape. It is wound on the cylinder 18 or 19. FIG. 1 shows a state in which the band plate 6 is wound around the winding drum 18.
[0032]
In this case, as shown in FIG. 7, the gear clutch 39 externally fitted to the clutch gear inner pipe 38 is engaged with the spline of the boss portion of the gear 34, so that the power of the main motor 40 is supplied to the intermediate shaft 33, the clutch gear The power is transmitted to the winding shaft 29 via the inner tube 38, the gear clutch 39, the gear 34, and the pinion 31, and the winding drum 18 is driven to rotate. Since the gear clutch 39 is not engaged with the spline of the boss portion of the gear 35 and the gear clutch 41 is disengaged from the bobbin shaft 30, even if the main motor 40 and the auxiliary motor 42 are driven, The bobbin shaft 19 and the winding drum 19 are stopped without rotating.
[0033]
When the band plate 6 is wound on the winding drum 18 to form a coil 6 'having a predetermined diameter, the cutting machine 9 is rotated in the direction of the arrow to cut the band plate 6 (see FIG. 2), and the preceding band is cut. The subsequent strip 6 from which the strip 6 has been cut is fed by the pinch roll 10, guided by the switched guide plate 47 and fed to the winding drum 19 side, and the winding of the subsequent strip 6 by the winding drum 19. Pickup is started (see FIG. 3). The coil 6 ′ wound around the winding drum 18 is removed and transported to the next step by the coil car 20.
[0034]
When the subsequent winding of the strip 6 by the winding drum 19 is started, the driving device 45 is operated and the belt 44 of the belt wrapper 17 is in contact with the outer periphery of the winding drum 19 as shown in FIG. As shown in FIG. 8, the gear clutch 39 is disengaged from the splines of the bosses of the gears 34 and 35, and the gear clutch 41 is fitted to the bobbin shaft 30. Therefore, the power of the auxiliary motor 42 is transmitted to the winding shaft 30 and the winding drum 19 is driven to rotate.
[0035]
When the rotation speed of the winding drum 19 becomes equal to the rotation speed of the intermediate shaft 33 driven by the main motor 40, the gear clutch 39 engages with the spline of the gear 35 boss as shown in FIG. The power of the main motor 40 is transmitted to the winding shaft 30 via the intermediate shaft 33, the clutch gear inner tube 38, the gear clutch 39, the gear 35, and the pinion 32, and the winding drum 19 is driven to rotate. When the winding drum 19 is driven to rotate by the main motor 40, the gear clutch 41 is disengaged from the winding drum shaft 30.
[0036]
During this time, the belt 44 of the belt wrapper 17 is separated from the winding drum 19 by the thickness of the band plate 6 by the driving device 45 until the belt 6 is wound several times around the winding drum 19. The outer periphery of the strip 6 is pressed. When the belt 6 wound around the winding drum 19 is no longer loosened, the belt 44 of the belt wrapper 17 is retracted from the winding drum 19 side to the standby position by the driving device 45.
[0037]
Next, the housing 25 is rotated by a motor (not shown), and the positions of the winding drums 18 and 19 are reversed with respect to the intermediate shaft 33 (see FIGS. 4 and 10). That is, the winding drum 19 is positioned on the side away from the belt wrapper 17, and the winding drum 18 is positioned on the belt wrapper 17 side. In this state, the winding drum 19 of the strip 6 is formed until a coil 6 'having a predetermined diameter is formed. Winding is continued. When the coil 6 'having a predetermined diameter is formed, the strip 6 is cut again in the same manner as described above, and the winding of the subsequent strip 6 on the winding drum 18 is started, and the winding drum 19 is formed. The coil 6 ′ wound by the coil is transported to the next step by the coil car 20.
[0038]
According to the illustrated example, the winding machine 16 and the belt wrapper 17 as the winding device, the coil car 20 as the coil unloading device, and other related devices may be provided one by one. In addition, equipment costs and operation and maintenance costs can be reduced.
[0039]
FIG. 11 shows another example of a mobile winder used in the strip manufacturing equipment of the present invention. The winding machine 48 shown in FIG. 11 includes a moving body 50 that can be moved obliquely in the traveling direction of the band plate 6 by a fluid pressure cylinder 49, and the moving body 50 has a predetermined moving direction in the moving direction of the moving body 50. Drivable winding drums 51 and 52 are mounted at a distance from each other. The bell trapper 17 is the same as that of the above-described illustrated example.
[0040]
Even if such a mobile winder 48 is used, the winder 48, the belt wrapper 17, the coil car, and other related devices only need to be provided one by one. In addition, operation and maintenance costs can be reduced.
[0041]
As the moving body in the strip manufacturing equipment of the present invention, a truck having wheels, a sliding block with a sliding surface lubricated, or the like can be used. Of course, various changes can be made within a range not to be performed.
[0042]
【The invention's effect】
As described above, according to the strip manufacturing equipment according to claims 1 to 6 of the present invention, a winding device such as a winder or a belt wrapper, a coil unloading device such as a coil car, and other related devices are 1 Since it suffices to provide the bases one by one, an excellent effect that the whole equipment can be made compact and the equipment cost and operation and maintenance cost can be reduced can be obtained.
[Brief description of the drawings]
FIG. 1 is a side view illustrating an example of an embodiment of a strip manufacturing apparatus of the present invention, and is a side view illustrating a state where a strip is being wound by one of the winding drums.
FIG. 2 is a side view showing an example of an embodiment of the strip manufacturing apparatus of the present invention, in which a strip having a predetermined diameter is formed by a strip wound on one of the winding drums, and a strip behind the coil is formed. It is a side view which shows the state cut | disconnected and winding of the next strip is started by the other winding drum.
FIG. 3 is a side view showing an example of the embodiment of the strip manufacturing equipment of the present invention, and is a side view showing a state where the winding of the next strip is started by the other winding drum.
FIG. 4 is a side view showing an example of the embodiment of the strip manufacturing apparatus of the present invention, and is a side view showing a state in which a subsequent strip is being wound by the other winding drum.
FIG. 5 is a side view of the casting roll for explaining the reason why the casting roll is preferably set to 300 mm to 800 mm in the strip manufacturing equipment of the present invention.
FIG. 6 is a front view of an example of a rolling mill used in the strip manufacturing equipment of the present invention.
FIG. 7 is a sectional view of an example of a winder used in the strip manufacturing equipment of the present invention, in which one of the winding drums is driven to rotate by a main motor.
FIG. 8 is a cross-sectional view of an example of a winder used in the strip manufacturing equipment of the present invention, and is a cross-sectional view showing a state where the other winding drum is rotationally driven by an auxiliary motor.
FIG. 9 is a cross-sectional view of an example of a winder used in the strip manufacturing equipment of the present invention, showing a state in which the other winding drum that is rotationally driven by an auxiliary motor is switched to be rotationally driven by a main motor. FIG.
FIG. 10 is a cross-sectional view of an example of a winding machine used in the strip manufacturing apparatus of the present invention, in which one winding drum and the other winding drum are inverted to wind the strip with the other winding drum. It is sectional drawing which shows a state.
FIG. 11 is a side view of another example of the winder used in the strip manufacturing equipment of the present invention.
FIG. 12 is a side view of an example of a conventional strip manufacturing facility.
[Explanation of symbols]
1 Continuous casting machine 1a, 1b Casting roll (twin roll or single roll)
3 Tundish 4 Molten metal 6 Strip 8 Rolling machine 16 Winding machine 17 Bell wrapper (winding device)
18 winding drum 19 winding drum 48 winder 50 moving body 51 winding drum 52 winding drum

Claims (6)

A continuous caster provided with a twin roll or a single roll for continuously casting a strip having a predetermined width by supplying molten metal from a tundish arranged at an upper portion; and one or two rolls installed downstream of the continuous caster A rolling mill installed on the downstream side of the rolling mill, and a winder that winds the strip by switching the two winding drums. Strip manufacturing equipment. The strip manufacturing equipment according to claim 1, wherein the diameter of the twin roll or the single roll is 300 mm to 800 mm. 3. The strip manufacturing equipment according to claim 1, wherein the winder is a carousel reel. The strip manufacturing equipment according to claim 1 or 2, wherein the winding machine includes a movable body capable of reciprocating movement and two winding drums mounted on the movable body. 5. The strip manufacturing equipment according to claim 1, further comprising a winding device for winding the strip around the winding drum so that the strip does not loosen from the winding drum until several windings have started. The strip manufacturing equipment according to claim 5, wherein the winding device is a belt wrapper.

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