JP2999619B2 - Metal sheet hot rolling equipment - 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 equipment for metal sheets, and more particularly to a hot rolling equipment for aluminum sheets.

[0002]

2. Description of the Related Art In recent years, in response to the demands of the times, there has been planned a metal sheet hot rolling facility aiming at improvement of quality, productivity and yield, and reduction of operation personnel. In particular, for aluminum plates, many new designs are being considered due to the remarkable growth of can materials and the demand for lighter vehicles. Among them, the biggest obstacle is the difficulty of location. In addition, since the equipment length of several hundred meters is required, in addition to difficulties in location, the amount of civil engineering and construction costs are increased, and the financial burden is large. Further, in general, the increase in the amount of the coil alone for the purpose of improving the yield increases the equipment length, which is particularly remarkable in the case of aluminum.

[0003] In general, hot rolling equipment for aluminum sheets generally includes one reversible rough rolling mill and finishing tandem rolling mills 3 to 5.
It is composed of a table. In this equipment, the interval between the reversible rough rolling mill and the finishing mill group must be equal to or longer than the bar length after the final pass of rough rolling. In the case of an average 3000 series aluminum, the length is 172 m or more. Also. In addition, the length of the entry table of the rough rolling mill is required to be longer than the length of the bar material one pass before the final pass of the rough rolling, and is 120 m or longer. Therefore, the total equipment length requires a minimum of 292 m or more in total. (Here, the equipment length does not include auxiliary equipment such as shears). This not only lengthens the equipment length, but also has the drawback that the number of table rollers constituting the table becomes enormous, and the work of removing the aluminum coating adhered to the roller surface requires a great deal of work. Will be.

Japanese Patent Publication No. Sho 53-16380 discloses a conventional technique for shortening a table length in a hot rolling machine for metal sheets. This is done by placing a winding device (coil box) between the rough rolling mill group and the finishing rolling mill group, winding the bar material once into a coil after rough rolling, and then performing finish rolling to reduce the space and reduce the bar material. The purpose is to prevent cooling. However,
Five rolling stands are installed as a rough rolling mill group.

If this conventional technique is applied to the above-mentioned hot rolling equipment for aluminum sheets, the bar material having the maximum length obtained in the final pass of the rough rolling mill is wound around a coil, and the rough rolling mill and the finish rolling are performed. The distance between the aircraft is greatly reduced.

[0006]

However, the above prior art has the following problems. In the above prior art, a coil box is provided as a winding device between a rough rolling mill group and a finishing rolling mill group. However, this coil box is designed to bend the bar material and wind it loosely, and since the inner diameter side is open, the bar material slips due to the tightening. For this reason, in the case of ordinary steel sheets, if the scale is not removed very much, flaws occur on the bar surface, and the defects remain even after cold rolling and cannot be used for high-grade materials. Further, in the case of an aluminum plate, surface defects are severe and the product does not become a product.

An object of the present invention is to provide a metal sheet hot rolling equipment capable of significantly reducing the equipment length and improving the surface quality.

[0008] In order to achieve the above object, the present invention relates to a metal sheet hot rolling facility comprising at least one rough rolling mill and a finishing mill group, wherein the rough rolling mill and the finishing mill group are combined. the intermediate, established the winding-unwinding device, and then the winding-unwinding device and drum, the drum is above the metal plate
Has a grip hole to insert the end, and the outer diameter is the center in the axial direction
It has a concave crown shape that gradually increases from the
It is a non-expandable drum .

Further, the present invention provides at least one reversible type
In a metal sheet hot rolling facility comprising a rough rolling mill and a finish rolling mill group,
A drum type winding / unwinding device is installed in the
Two rough rolling mills of the type are arranged close to each other, and the two rough rolling mills are an integrated two-stage rough rolling mill in which two sets of two-stage mills are incorporated in one mill housing . The integrated two-stage rough rolling mill preferably includes means for simultaneously crossing two upper rolls and two lower rolls in opposite directions.

Preferably, the drum of the winding / unwinding device has a grip hole into which a tip of a metal plate is inserted, and has a concave crown shape whose outer diameter gradually increases from an axial center toward both ends. This is a non-expanding / reducing drum.

[0011] More preferably, the winding / unwinding device comprises:
First means for transferring the coil wound on the drum at the winding position to the unwinding position, and second means for returning the drum after unwinding at the unwinding position to the winding position via the standby position Means are further provided. In this case, the second means preferably includes means for pulling out the unwound drum from the unwinding position, means for transferring the unwound drum to a standby position, and winding the drum transferred to the standby position. With means to send to the location,
Preferably, the winding / unwinding device further includes means for heating the drum at the standby position to maintain the drum at a predetermined temperature.

Preferably, a rear end of the bar material during finish rolling and a front end of the bar material unwound from the winding / unwinding device are provided between the winding / unwinding device and the finishing mill group. A means for joining is provided. Also preferably, the rough rolling
Mill and the finishing mill group, the bar material length after rough rolling
At a distance of

[0013] Winding between the rough rolling mill and the finishing mill group
By installing the unwinding device, the distance between the rough rolling mill and the finishing rolling mill group can be shortened, and by using the winding and unwinding device as a drum type, it becomes possible to wind up the bar material tightly. Generation of flaws due to slippage between materials can be prevented. Soshi
The outer diameter of the drum from the center in the axial direction to both ends.
By forming a concave crown shape that gradually increases toward
Of the edge of the material
And especially the yield at the tip is improved.

By arranging two reversible rough rolling mills close to each other, the bar material length before two passes of the rough rolling can be shortened, and the distance between the rough rolling mill and the finishing rolling mill group can be further reduced. 1
By using an integrated two-stage rough rolling mill in which two sets of two-stage mills are incorporated in one mill housing, the length of the rolling mill itself is shortened, and the equipment length can be further reduced. By providing means for simultaneously crossing the two upper rolls and the two lower rolls in opposite directions, even when the rolling load changes greatly, such as in the case of aluminum plate rolling, sufficient plate crown control ability can be exhibited, and good quality can be obtained. Rolling becomes possible.

[0015]

First means for transferring the coil wound on the drum at the winding position to the winding position by the winding / unwinding device;
By providing the second means for returning the drum after the completion of the unwinding at the unwinding position to the winding position via the standby position, the rough rolling and the finish rolling can be independently performed, thereby reducing the production amount. The above-described winding and rolling can be performed without the above. By providing a means for heating the drum at the standby position to maintain the drum at a predetermined temperature, it is possible to prevent a decrease in temperature during standby and prevent a decrease in temperature of the bar during winding of the bar.

By installing the bar material joining means between the winding / unwinding device and the finishing mill group, the finish rolling can be performed continuously, the productivity is improved, and the yield and quality are improved. improves.

[0018]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, a hot rolling mill for a metal sheet according to one embodiment of the present invention includes a reversible four-stage rough rolling mill 1, a finishing mill group 2 including four stands, and a rough rolling mill. Non-expanding / retracting drum type winding arranged between the finishing roll group 1 and the finishing mill group 2
And an unwinding device 3. About 5 in heating furnace not shown
After heating to 00 ° C, the extracted slab is
a, and about 20 to 40 mm in the four-stage rough rolling mill 1
Rolled reversibly to a coarse bar of thickness. After the final pass, the coarse bar is conveyed on the table roller 4b, and is taken up by the winding / unwinding device 3.
Is wound once on the coil 6a by the winding drum 5a. After completion of the winding, the drum 5a and the coil 6a are moved to the unwinding position, become the unwinding drum 5b and the unwinding coil 6b, respectively, and the rough bar is unwound from the unwinding coil 6b and finished by the finishing mill group 2. It is rolled and wound around a product coil 8 by a winder 7.

The drum 5a or 5b (hereinafter simply referred to as "5")
2 and 3 are shown in FIGS. The drum 5 is a fixed-diameter non-expandable drum composed of a center shaft 10 and a drum main body 11, and the drum main body 11 is formed with a grip hole 12 for inserting a leading end of a rough bar. Also, the drum body 1
No. 1 has a concave crown shape in which the outer diameter gradually increases from the central portion in the axial direction toward both ends, and only the edge portion of the bar material contacts the drum surface.

The details of the structure of the winding / unwinding device 3 are shown in FIGS. As shown in FIGS. 4 to 7, the winding / unwinding device 3 includes a pair of left and right drum holding frames 20, drum driving devices 21a and 21b at a winding position and an unwinding position, and drum driving devices 21a and 21b. Clutches 22a and 22b for connecting or disconnecting the non-expansion / reduction drum 5 to and from the drum, hydraulic cylinder driven drum clamps 23a and 23b, a coil opener 24, a pinch roller 50, and a rolling roller 25 provided on a rolling line and provided on the upper surface. Drum lifter 2
6, a rail 51 for traversing the drum lifter 26,
Rolling roller 27 is installed outside the rolling line and
, A rolling roller 29a, 29b connecting the drum holding frame 20 and the drum lifter 28 outside the rolling line, a rail 30 for traversing the drum lifter 28 outside the rolling line, a drum pull-out cylinder 31a, and a drum insertion. A cylinder 31b, a rotating roller 32 for rotating a standby drum 5c (described later) at a standby position,
A hydraulic cylinder 52 for raising and lowering the rotating roller 32 and an electric heater 33 for heating the standby drum 5c to maintain the temperature at a predetermined temperature are provided.

When the winding of the coil 6a by the winding drum 5a is completed, the clutch 22a is released to release the winding drum 5a.
From the drum driving device 21a. After releasing the drum clamp 23a, the take-up drum 5a and the take-up coil 6a are slightly lifted from the drum holding frame 20 by the drum lifter 26, and the drum lifter 26 is traversed on the rail 51 so that the finish mill side The drum is transported to the unwinding position, fixed by a drum clamp 23b, and further connected to a clutch 22b.
Connect to b. At this unwinding position, the coil and the drum become the unwinding coil 6b and the unwinding drum 5b.
Is unwound through a coil opener 24 and a pinch roller 50, and is finish-rolled by a finishing mill group as described above.

When the unwinding of the unwinding coil 6b is completed, the clutch 22b is released, and the unwinding drum 5b is slightly raised from the drum holding frame 20 by the drum lifter 26 in the rolling line as shown in FIG. rolling the drum 5b by the drum drawer cylinder 31 a in the roller 2
5, 29b, 27, and is drawn on a drum lifter 28 outside the rolling line. Next, the drum lifter 28
Is traversed on the rail 30, and the drum 5b is
The standby drum is moved to the standby position on the 9a side and becomes the standby drum 5c. Then, as shown in FIGS. 8 and 9, the rotary roller 32 is raised together with the standby drum 5 c by the hydraulic cylinder 52, and the drum 5 c is heated by the electric heater 33 while rotating the drum 5 c by the rotary roller 32. The drum surface is kept at a uniform predetermined temperature. The same rotary roller 32, hydraulic cylinder 52, and electric heater 33 are arranged in the rolling line, and if there is enough time before the next rough bar rolling, the drum is moved to the winding position as described below. After that, the surface may be heated uniformly while rotating the winding drum 5a at this winding position.

At the winding position, the coarse bar winding is completed,
When the take-up drum 5a is conveyed to the unwinding position together with the take-up coil 6a as described above, the standby drum 5c is pushed by the drum insertion cylinder 31b and moves on the rolling roller 29a, so that the take-up position of the rolling line is reached. Is set to Then
By connecting the clutch 22a, the winding drum 5a
To start winding the next coarse bar. By repeating the above operation, the winding and unwinding of the coarse bar are performed smoothly.

Next, the operation of this embodiment will be described. FIG.
Fig. 1 shows a conventional hot rolling equipment for aluminum sheets. Normal,
This equipment includes one reversible rough rolling mill and three to five finishing tandem rolling mills. The winding / unwinding device provided in this embodiment is not provided. The equipment length of this conventional system is as follows. The rolling schedule for aluminum is significantly different in the 1000s, 3000s and 5000s, but for the average 3000s, the slab dimensions are 560 mm thick and 8 m long, and the bar material after rough rolling is 26 mm thick. , finish when rolling and 2.3mm thickness of the products exit the maximum length of the bar material (bar material length after rough rolling final pass) 8m × (560/26) = 172m rough rolling final one pass 172 × (1-0.3) = 120.4 m as bar length before rolling 30% Reduction rate 120.4 × (1-0.3 as bar length 30% before final rolling of rough rolling Therefore, in the method shown in FIG. 10 , the distance between the rough rolling mill 1 and the finishing rolling mill group 2 needs to be 172 m or more corresponding to the bar length after the final pass of the rough rolling. Of the incoming table The length of the bar is required to be 120 m or more, which is equivalent to the length of the bar before the final pass of the rough rolling, and the total length of the equipment is required to be at least 292 m. Not included). This not only lengthens the equipment length, but also increases the number of table rollers 4a and 4b constituting the table, and requires a great deal of labor to remove the aluminum coating adhering to the roller surface. Will also have.

In the present embodiment, the above-mentioned disadvantage is solved by greatly reducing the table length. That is, first of all, the maximum length of the bar material is obtained in the final pass of the roughing mill 1, so that the equipment shown in FIG. 10 requires a minimum of 172 m between the rough rolling mill 1 and the finishing mill group 2. On the other hand, in the present embodiment, the bar material after the final pass is once wound around the coil by the winding / unwinding device 3. For this reason, the last bar material coming between the rough and finish rolling mills is before the last two passes of rough rolling, and its length is 84 m as described above, and 172 m-
The table length is shortened to 84 m = 88 m, and even if the winding device requires 10 m, the equipment length is reduced by 78 m.

Next, a coil box is placed between the group of rough rolling mills and the group of finishing mills, and after rough rolling, the bar material is once wound into a coil and then subjected to finish rolling to reduce the space and prevent the bar material from cooling. The method aiming at is known in the art as described in JP-B-53-16380 and has been put to practical use. However, this coil box is configured to bend the bar material and wind it loosely, and since the inner diameter side is open, slippage between the bar materials occurs due to winding. For this reason,
In the case of ordinary steel sheet, if the scale is not removed sufficiently, a flaw is generated on the bar surface, and the defect remains even after cold rolling and cannot be used for high-grade materials. Further, in the case of an aluminum plate, surface defects are severe and the product does not become a product.

In this embodiment, the coil box type is stopped,
The drawback is prevented by tightly winding the drum. That is, as a method of winding the bar material,
There is a down coiler system that winds up with frictional force by a holding roller without a grip, and a winding system that uses a non-expansion / reduction drum used in a so-called Steckel mill having a grip hole.In a down coiler, slip flaws until winding is completed, and The holding roller causes scratches. Therefore, in this embodiment, the non-expanding / reducing drum 5 having the Steckel mill type grip hole 12 as shown in FIGS. 2 and 3 is used.

Further, even when the non-expandable drum 5 is used to wind tightly, the bar material may slip on the drum until the winding tension is secured. In the case of an aluminum plate, if it comes into contact with the drum and slips, it becomes a defective product. In the winding of the bar material, since the thickness of the bar material is as thick as 20 to 40 m,
Assuming a drum diameter of 1 m and a circumference of 3 m, the diameter after the final cold rolling was 0.1 m.
With a thickness of 2 to 0.4 mm, a defective product having a length of about 300 m is generated, resulting in a great loss.

In this embodiment, the shape of the drum is devised in order to eliminate the drawback. That is, as described above, the drum main body 11 has a concave crown shape in which the outer diameter gradually increases from the axial center toward both ends, and only the edge of the bar material comes into contact with the drum. . By doing so, the bar material has flaws only at the edge portion, but since this portion is originally cut off after hot rolling, the yield does not decrease.
In this case, there is a concern that the central portion other than the edge of the bar material contacts the drum or falls down, but it has been proved that there is no such concern. This is because the plate thickness is large and the winding tension is low.

Incidentally, the necessary tension σ _t for winding the bar material around the coil without any gap is obtained from the following equation. F
Is the total tension,

[0031]

F = σ _t Bh = M _s / ρ (1) where B is the plate width h is the plate thickness M _s is the plastic bending moment of the bar material ρ
Is the bending radius

[0032]

M _s = Bh ² σ _s / 4 (2) where σ _s is ρ = D / 2, where the yield point D of the material is the drum diameter.

[0033]

Σ _t = hσ _s / 2D (3) where D = 1000 mm, H = 26 mm, σ
_s is 2Kg / mm ² , 300 with # 1000 aluminum
If in No. 0 aluminum 6Kg / mm ^2, 5000 No. aluminum 12 Kg / mm ^2, the case of No. 1000 _{aluminum: σ t = 26 × 2/} 2000 = 0.026Kg / mm 2 3000 No. case of aluminum: sigma _t = 26 × 6/2000 = 0.078 Kg / mm ^{2 In} the case of aluminum No. 5000: σ _t = 26 × 12/2000 = 0.156 Kg / mm ^{2 At} that time, the pressure σ _r due to the external pressure is 2hσ _t /
D, and 2h / D = 2 × 26 /
1000 = 5.2%, which is extremely small. As the winding further proceeds, the external pressure σ _r tends to increase, but it is considered that the effect is difficult to reach the first-winding (first-layer) bar material due to the rigidity of the bar material.

Finally, when the bar material is once wound into a coil and then unwound and supplied to a finishing mill, if both the winding and unwinding are performed at the same place, the rough rolling mill is used during the unwinding and rolling. Since the final pass rolling cannot be performed, the production amount decreases. In the present embodiment, as described above, the winding / unwinding device 3 separates the winding drum 5a from the drum driving device 21a, moves to a position different from the winding position, and moves to another drum driving device 21b.
It is unwound by. In addition, a standby position is provided between the unwinding position and the winding position for the winding position, and the standby drum 5c is prepared. Drum can be set. Further, the standby drum 5c is in a standby state,
As a result, the coil can be used immediately after being set at the winding position without causing a temperature drop of the winding coil. Therefore, in the present embodiment, even though the bar material is once wound around the coil, a decrease in the production amount can be suppressed to a minimum, and a decrease in the temperature can be prevented. In addition,
If you want the production amount is even greater, the waiting position after the winding completion
The position may be provided between the winding position and the unwinding position . In this case, the drum and the coil after the completion of the winding can be taken out to the standby position by the same mechanism as shown in FIGS. 5 to 9 and set from the standby position to the unwinding position.

In summary, according to the present embodiment, since the winding / unwinding device 3 is provided between the rough rolling mill 1 and the finishing mill group 2, the equipment length can be reduced to about 60%. The equipment construction cost can be greatly reduced, and the length of the table roller can be shortened, so that the work of removing the aluminum coating is greatly reduced. Further, since the winding / unwinding device 3 is of the non-expanding / retracting drum type, it is possible to prevent the occurrence of flaws due to slippage between the bar materials, and to manufacture a high quality plate material.

Further, since the shape of the non-expanding / reducing drum 5 is a tapered concave crown, the material is flawed only at the edge portion which is originally trimmed, and the yield at the tip portion is particularly improved.

Further, the winding drum 5a winds the bar material into a coil, is separated from the driving device 21a, is transferred to the unwinding position, and the unwinding drum 5b after the unwinding is completed until the unwinding starts. Heated to a predetermined temperature at the standby position within the time, and returned to the original winding position again, so that rough rolling and finish rolling can be performed independently, and the above-mentioned winding rolling can be performed without lowering the production amount. In addition to this, the temperature of the drum can be prevented from lowering during standby, and the temperature of the bar can be prevented from lowering during winding of the bar.

A second embodiment of the present invention will be described with reference to FIGS. In FIG. 11, the metal sheet hot rolling equipment of the present embodiment is an integrated apparatus including two two-high rolling mills instead of one reversible four-high rough rolling mill in the first embodiment shown in FIG. A reversible two-stage rough rolling mill 30 of the type is installed. The other configuration is the same as that of the first embodiment except that the equipment length is further reduced by adopting the reversible two-stage rough rolling mill 30.

FIGS. 12 and 13 show a reversible two-stage roughing mill 3
0 shows the details of the configuration. 12 , two sets of upper work rolls 32a, 33a and upper bearing boxes 34a, 35a, 36a, 37a and two sets of lower work rolls 32b, 33b and lower bearing boxes 34b, 35b (partial views) are provided in a mill housing 31. (Not shown) is stored. That is, the reversible rough rolling mill 30 has a configuration in which two sets of two-stage mills are incorporated in one mill housing 31. In this specification, this is abbreviated as “twin mill”.

Each of the upper work rolls 32a and 33a and the lower work rolls 32b and 33b crosses a line perpendicular to the rolling direction at the same time in a direction opposite to each other . As shown, hydraulic cylinders 38a, 39a, 40a, 41 for independently biasing the upper bearing boxes 34a, 35a, 36a, 37a, respectively.
a is provided. Lower bearing box 34
Similar cross devices are provided for b, 35b and the like.

The axial direction of the upper and lower bearing housings is restrained by keeper plates 42a, 43a, 42b, 43b. These keeper plates have arcuate surfaces 44a, 45a (only some of which are shown) that allow the bearing housing to tilt.

When changing rolls, set the inclination of the upper and lower rolls to 0.
°, that is, at right angles to the rolling direction, the two sets of upper and lower rolls and the bearing box are simultaneously pulled out of the housing 31 and replaced. Although not shown, the upper and lower rolls are driven by a motor via a universal joint and a speed reducer, as in a general rolling mill.

The present embodiment configured as described above further expands the effects of the above-described first embodiment . That is, in this embodiment, the integrated reversible two-stage rough rolling mill 30
, Two two-high rolling mills are arranged close to each other. The rolling reduction of two two-high mills is also 30%
Assuming that, the length of the bar material on the incoming side of the rough rolling mill 30 is 84 m, which is 70% of 120 m in the case of one rough rolling mill, and the length of the bar material on the outgoing side of the rough rolling mill 30 is 84m in the case of one unit is greatly reduced to 41m of 0.7 × 0.7 = 0.49. However, if the rough rolling mills are arranged in the vicinity of two four-stage mills, the cost of the rough rolling mills increases, and the distance between the rough rolling mills increases by about 6 m.

In this embodiment, in order to further improve this point, two sets of two-stage mills are incorporated in one integrated reversible two-stage rough rolling mill 30, ie, one mill housing 31, as described above. "Twin mill". By using this twin mill, the increase in cost can be reduced, and the distance between the two rough mills can be reduced to about 1.5 m. Further, since the production capacity can be doubled by using two coarse mills, the thickness of the bar material can be further reduced, and the number of finishing mills can be reduced. The disadvantages of the thinner bar material are higher costs due to lowering the temperature and shortening the roller pitch of the table.However, the former can be prevented by winding on a coil, and the latter can still be achieved on the coarse mill entry side where the table length is long. It does not have to be thinner than before, and it becomes thinner on the exit side of the coarse mill, but does not affect the cost because the table length becomes extremely short.

The rough rolling mill of the two-stage mill has a large work roll diameter as compared with the four-stage mill, and is suitable for rolling a thick slab in terms of bite. However, since there is no reinforcing roll, the deflection of the roll is reduced. It changes greatly depending on the load. In the case of an aluminum plate, since the rolling load changes greatly depending on the material, it is necessary to change the crown of the roll for each material.

In the present embodiment, this point is also taken into consideration, and by adopting a crossing device that simultaneously crosses two sets of rolls in a two-stage twin mill, the plate crown control can be easily performed. Even in the case where the change in the rolling load is large, such as in the case of aluminum sheet rolling, sufficient sheet crown control ability is exhibited, and the quality of rolling is improved.

A third embodiment of the present invention will be described with reference to FIGS. In FIG. 14, the hot-rolling equipment for a metal sheet according to the present embodiment is different from the second embodiment shown in FIG. 11 in that a bar during finish rolling is provided between the winding / unwinding device 3 and the finishing mill group 2. A bar material joining machine 60 for joining the rear end of the material and the tip of the bar material unwound from the winding / unwinding device 30 is installed. The bar material joining machine 60 is disclosed in
As described in Japanese Patent No. 4401 or JP-A-57-109504, a running joining machine is employed to join the rear end of the preceding bar material and the front end of the following bar material in the running state. At this time, as shown in FIGS. 15 and 16, the unwinding drum 5 b and the unwinding coil 6 b for supplying the following bar member 61 are supplied with hydraulic pressure while being tensioned by a brake 63 built in the bearing box 62. The cylinder 64 moves to the unwinding position on the finishing mill group 2 side. Further, as shown in FIG. 14, after the finish rolling, the plate material is divided by shears 65, performed continuously coil 8A, the winding of 8B by winder 7 A, 7 B of Karozeru scheme.

According to this embodiment, the finish rolling can be performed continuously, and there is an effect that the productivity is improved, and the yield and the quality are improved.

[0049]

According to the present invention, the following effects can be obtained. (1) Since the winding / unwinding device is installed between the rough rolling mill and the finishing mill group, the equipment length can be reduced to about 60% of the conventional length.
The equipment construction cost can be greatly reduced, and the length of the table roller can be shortened, so that the work of removing the aluminum coating is greatly reduced.

(2) Since the winding / unwinding device is a drum type, it is possible to prevent the occurrence of flaws due to slippage between the bar materials, and to manufacture a high quality plate material.

(3) Since the surface of the drum is formed into a tapered concave crown shape, the material is flawed only at the edge portion which is originally cut off, and the yield at the tip portion is particularly improved.

(4) Put the rough rolling mill in one housing
A set of two-stage mills can be stored, further shortening the equipment length.
It works.

(5) After winding the bar material on the drum, unwind
Transfer position, and the drum after unwinding completes via the standby position.
To the original take-up position again.
It is possible independently and can secure the same production volume as before
You.

(6) The drum at the standby position is heated and
Since the temperature is kept constant, the temperature during standby can be prevented from dropping,
-It is possible to prevent a decrease in the temperature of the bar material when winding the material.

(7) Since the two sets of rolls are simultaneously crossed in opposite directions, even when the rolling load changes greatly, as in the case of rolling an aluminum sheet, sufficient sheet crown control ability can be exerted, and good quality rolling can be achieved. Can be implemented.

(8) Since the bar joining machine is installed between the winding / unwinding device and the finishing mill group, the finish rolling can be performed continuously, thereby improving the productivity, the yield, and the quality. Has the effect.

[Brief description of the drawings]

FIG. 1 is an overall layout view of a metal sheet hot rolling facility according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view of a non-expansion / reduction drum.

FIG. 3 is a front view of a non-expansion / reduction drum.

FIG. 4 is a front view of the winding / unwinding device.

FIG. 5 is a plan view of the winding / unwinding device.

FIG. 6 is a sectional view of the winding / unwinding device taken along line VI-VI in FIG. 5;

FIG. 7 is a diagram showing a drum lifter outside a rolling line of the winding / unwinding device.

FIG. 8 is a view showing the winding / unwinding device in FIG.
It is II sectional drawing.

FIG. 9 is a sectional view of the winding / unwinding device taken along line IX-IX in FIG. 5;

FIG. 10 is an overall layout view of a conventional metal sheet hot rolling facility.

FIG. 11 is an overall layout view of a metal sheet hot rolling equipment according to a second embodiment of the present invention.

FIG. 12 is a front view of a twin mill.

FIG. 13 is a plan view of a twin mill.

FIG. 14 is an overall layout view of a metal sheet hot rolling facility according to a third embodiment of the present invention.

15 is a front view of the unwinding drum portion shown in FIG.

16 is a plan view of the unwinding drum portion shown in FIG.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Reversible rough rolling mill 2 Finishing rolling mill group 3 Winding / unwinding device 5, 5a, 5b Non-expanding / reducing drum 6a, 6b Coil 12 grip hole 20 Drum holding frame 21a, 21b Drum driving device 22a, 22b Clutch 24a, 24b Rolling arms 26, 28 Drum lifter 31a Drum pull-out cylinder 31b Drum insertion cylinder 33 Electric heater 30 Twin mill 32a, 33a, 32b, 33b Vertical work rolls 38a-41a Hydraulic cylinder (cross device) 60 bar joining machine

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-2-37903 (JP, A) JP-A-57-109504 (JP, A) JP-A-59-191503 (JP, A) JP-A-1- 170517 (JP, A) JP-A-60-9503 (JP, A) JP-A-55-88929 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) B21B 1/26 B21B 13 / 14 B21B 31/00 B21C 47/28 B21C 49/00

Claims (9)

(57) [Claims] 1. A metal sheet hot rolling facility comprising at least one rough rolling mill and a finishing mill group, wherein a winding and unwinding device is provided between the rough rolling mill and the finishing mill group. was placed, and then the winding-unwinding device and drum, the drum of the winding-unwinding device, insert the tip of the metal plate
With a grip hole and an outer diameter from the center in the axial direction to both ends
Non-expansion with concave crown shape gradually increasing toward
Metal sheet hot rolling equipment characterized by being a drum . 2. A metal sheet hot rolling facility comprising at least one reversible rough rolling mill and a finishing rolling mill group, wherein a drum-type hot rolling mill is provided between the rough rolling mill and the finishing rolling mill group. A winding and unwinding device is installed and the reversible rough rolling mill is
And two rough rolling mills are arranged in close proximity to each other.
An integrated two-stage rough rolling mill incorporating a set of two-stage mills, the metal sheet hot rolling equipment. 3. The metal sheet hot rolling equipment according to claim 2 , wherein the integrated two-stage rough rolling mill includes means for simultaneously crossing two upper rolls and two lower rolls in opposite directions. Metal sheet hot rolling equipment characterized by the above-mentioned. 4. The metal plate hot rolling equipment according to claim 2 , wherein the drum of the winding / unwinding device has a grip hole into which a tip of the metal plate is inserted, and has an outer diameter extending from a central portion in the axial direction. Metal sheet hot rolling equipment characterized by a non-expanding / reducing drum having a concave crown shape that gradually increases toward both ends. 5. The metal sheet hot rolling equipment according to claim 1, wherein the winding / unwinding device transfers the coil wound on the drum at the winding position to the unwinding position. And a second means for returning the drum after unwinding at the unwinding position to the winding position via the standby position. 6. The metal sheet hot rolling equipment according to claim 5 , wherein said second means is means for pulling out the drum after the completion of unwinding from the unwinding position, and transferring the drawn-out drum to the standby position. Means for feeding a drum transferred to the standby position to a winding position. 7. The metal sheet hot rolling equipment according to claim 5 , wherein said winding / unwinding device further comprises means for heating the drum at the standby position to maintain the drum at a predetermined temperature. Metal sheet hot rolling equipment. 8. The metal sheet hot rolling equipment according to claim 1, wherein a rear end of the bar material during finish rolling is wound between the winding / unwinding device and the finishing mill group. -A metal plate hot rolling equipment characterized in that a means for joining a tip of a bar material unwound from an unwinding device is installed. 9. The metal sheet hot rolling equipment according to claim 1, wherein the rough rolling mill and the finishing mill group are:
Metal sheet hot rolling equipment, which is arranged at a distance equal to or less than the length of a bar material after rough rolling.