JPH07323324A - Rolling equipment - Google Patents

Abstract

PURPOSE:To reduce the number of finish rolling mills since a coil is rolled to a thin sheet and finish rolling is performed from the thin sheet by providing a heat insulating coiler preventing the cool of the coil and retaining the temperature of each part of the coil almost uniformly on the outlet side of a reverse rolling mill. CONSTITUTION:For instance, it is supposed that a 90mm thickness material 2 to be rolled supplied from a heating furnace 1 is rolled to a 1.6mm thickness product. When the 90mm thickness material 2 is inserted to a reverse rolling mill R, it is rolled to a 60mm thickness material by normal rotation rolling, and becomes a 40mm thickness material by being reversely rolled. Further, it becomes a 21mm thickness material after normal rotation rolling, and is coiled by a heat insulating coiler 3. It becomes a 11mm thickness material from a 21mm thickness material by reverse rolling, and is coiled on a heat insulating coiler 3 on the inlet side. Next, it is unwound, becomes a 6.5mm thickness material after normal rotation rolling, and is coiled on a heat insulating coiler 3 on the outlet side. It is unwound from the heat insulating coiler 3, after rolling it to a 3.3mm thickness material by a finish rolling mill F1, to a 2.1mm thickness material by a finish rolling mill F2, and to 1.6mm which is the thickness of a product by a finish roiling mill F3, it is coiled on a down coiler 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rolling facility in which reverse rolling is performed by rough rolling and the number of rolling mills is reduced, and a rolling facility in which reverse rolling is performed by rough rolling and finish rolling and the number of rolling mills is reduced. The present invention relates to a rolling facility for rolling a coil to a thin thickness in a rough rolling stage or in a rough rolling stage and a finish rolling stage by using a heat retaining coiler that heats the steel.

[0002]

2. Description of the Related Art A slab having a hot rolling process of 20 to 30 mm
To a thickness of 1 to 2 mm, and a finish rolling step of rolling to a thickness of about 1 to 2 mm. Various types of rough rolling mills are used in the hot rolling equipment. FIG. 16 shows an example of an arrangement of such rough rolling mills. (A) shows six rough rolling mills (R1 to R1).
R6) rolls the material to be rolled and scale breaker F
After removing the scale with SB, 7 finishing mills (F1
~ F7) is a rolling facility for rolling down and winding on a down coiler DC. (B) is a rough rolling mill, a reverse rolling mill RRM
The number of units is one, and normal rotation and reverse rotation are repeated, and after predetermined thickness, it is sent to the finish rolling mills F1 to F6, and the hot rolling equipment is compact. (C) is an improved version of (B), in which the strip (rolling material) sent from the reverse rolling machine RRM is wound up on a winding / rewinding machine W, and this is finished and rolled from the tail end of the strip. It is to be sent to F1 to F5.

In the equipment provided with the winding / unwinding machine W, the temperature decrease of the strip can be greatly improved by winding the coil around the coil, and it is not necessary to increase the rolling speed to prevent the temperature decrease. Rolling speed can be increased and rolling power can be reduced. Further, since the temperature of the strip is less decreased, the temperature of the material to be rolled supplied to the rough rolling mill can be set low, and further, the rolling speed can be decreased, so that the number of finishing rolling mills can be reduced from 7 to 5 units. Since it can be reduced to a stand, it is possible to significantly reduce the equipment cost.

Recently, due to the development of a thin slab continuous casting machine,
Thin slabs of about 0 to 50 mm have been cast,
A method has been developed in which this thin slab is directly charged into a heating furnace, soaked at a predetermined temperature, and then subjected to finish rolling by a direct finishing rolling mill except for a rough rolling mill. However, since the material to be rolled having a thickness nearly twice that of the conventional one is charged into the finish rolling line, the load on the finish rolling mill is large and the efficiency is poor.

In order to solve such a problem, FIG.
Finish rolling mill FR through a heating furnace from a continuous casting machine (not shown)
1, F2 to F5 is a device that is directly charged, and the first stand FR1 of the finishing rolling mill is a reverse rolling mill RRM, and after this, it is thinned to a thickness of 20 to 30 mm,
The rolling mill FR1 of the first stand is also a finishing rolling mill, and the finishing rolling is performed in tandem with the other finishing rolling mills F2 to F5.
In this case, the rewinding machine W for winding the material 1 to be rolled rolled by the reverse rolling machine FR1 is the reverse rolling machine F.
It is provided on the upstream side of R1.

FIG. 18 is a diagram showing the basic structure of the winding and rewinding machine W. The winding and rewinding machine W is basically a rolled material 1
Bending roll 7 with a curl and coil 8
It consists of a cradle roll 6 wound up in In this way, it is possible to wind and rewind the sheet having a thickness of about 20 to 50 mm.

By the way, recently, the equipment shown in FIG. 17 has been further improved to reduce the number of rolling mills and shorten the rolling line. In this case, a reverse rolling mill is used to perform rolling in a rough rolling stage to a depth of approximately 6 mm to 10 mm, and then a finishing rolling mill row is rolled to a depth of 1 to 2 mm.

[0008]

As the sheet thickness to be rolled becomes thinner, the rolling speed and the winding / unwinding speed also increase rapidly. Further, if the plate thickness of the coil becomes thin, the cooling becomes large, and the temperature of the coil end face in contact with the outside air and the temperature inside the coil are lowered. In the case of the winding and rewinding machine shown in FIG. 18, when the plate thickness becomes thin, there is no axis (mandrel), which makes it difficult to wind in a coil shape, and the shape becomes elliptical, so that high-speed winding and rewinding is possible. I can't. Further, since the coil cooling for the thin plate becomes large, the plate thickness up to about 20 mm is the limit of use. Therefore, in the rough rolling stage using the reverse rolling mill, it was not possible to roll to a plate thickness of 20 mm or less, and it was not possible to reduce the number of finish rolling mills and shorten the rolling line.

The present invention provides a coiler which can be wound up and unwound at a high speed and has heat retaining properties, and at the same time, after rough rolling to a thin plate by reverse rolling using this heat retaining coiler,
An object of the present invention is to provide a rolling facility in which the number of rolling mills is reduced by finish rolling and the rolling line is shortened.
Another object of the present invention is to provide rolling equipment in which the rolling line is further shortened by performing reverse rolling to finish rolling.

[0010]

In order to achieve the above object, the invention of claim 1 is directed to a reverse rolling machine for performing forward and reverse rolling of a material to be rolled supplied from a heating furnace, and an output of the reverse rolling machine. A heat-retaining coiler that is provided on the side of the heat-retaining coil to keep the temperature of each part of the coil substantially uniform and rewinds and rewinds, and a finish that finish-rolls the rolled material that is provided downstream of the heat-retaining coiler and is rewound from the heat-retaining coiler And a rolling mill train.

Further, the invention of claim 2 is the provision of a heat-retaining coiler on the inlet side of the reverse rolling mill, which retains the temperature of each part of the coil substantially evenly and winds and unwinds.

Further, according to a third aspect of the present invention, heat-retaining equipment for heating and retaining the material to be rolled is provided in the material-to-be-rolled material conveying equipment on the inlet side of the reverse rolling mill.

According to the invention of claim 4, the finishing rolling mill train for finishing rolling the material to be rolled fed from the heating furnace and the coil parts provided on the inlet side of the finishing rolling mill train are kept substantially uniform. A heat-retaining coiler that heats and winds and unwinds is provided, and the preceding stage of the finish rolling mill train is constituted by a reverse rolling mill that performs normal rotation and reverse rolling.

Further, the invention of claim 5 is such that a material to be rolled supplied from a heating furnace is normally or reversely rotated and reverse rolling is performed from rough rolling to finish rolling, and an input side and an output side of the reverse rolling machine. And a heat-retaining coiler that heats and unwinds the temperature of each part of the coil substantially evenly.

[0016] The invention of claim 6 is directed to a reverse rolling machine for rotating the material to be rolled supplied from the heating furnace in the normal direction, reverse rotation and rough rolling, and a material to be rolled provided downstream of the reverse rolling machine. A reverse finishing mill that performs normal rolling, reverse rotation, and finish rolling is provided, and is provided between the reverse rolling mill and the reverse finishing mill and downstream of the reverse finishing mill to keep the temperature of each coil part substantially uniform. And a heat-retaining coiler that heats, winds, and rewinds.

The invention according to claim 7 is a train of two reverse rolling mills arranged in a row for performing normal rotation and reverse rotation of a material to be rolled supplied from a heating furnace and performing rough rolling to finish rolling.
A heat-retaining coiler, which is provided on each of the inlet side and the outlet side of the reverse rolling mill train, heat-retains the temperature of each part of the coil substantially evenly and winds and unwinds the coil.

Further, the invention of claim 8 includes a reverse rolling machine for performing normal rotation, reverse rotation and rough rolling of a material to be rolled supplied from a heating furnace, and a material to be rolled provided downstream of the reverse rolling machine. Two reverse finishing rolling mill trains arranged in a row for normal rotation, reverse rotation, and finish rolling, between the reverse rolling mill and the reverse finishing rolling mill train, and downstream of the reverse finishing rolling mill train, respectively. And a heat-retaining coiler that retains the temperature of each part of the coil substantially evenly and winds and rewinds the coil.

Further, the invention according to claim 9 is characterized in that a plurality of reverse rolling mill trains arranged in a row for performing normal rotation and reverse rotation of the material to be rolled supplied from the heating furnace and performing rough rolling to finish rolling,
A heat-retaining coiler provided on the inlet side of the reverse rolling mill train to keep the temperature of each part of the coil substantially uniform and to wind and rewind.

According to a tenth aspect of the present invention, the heat-retaining coiler is provided with a mandrel around which a coil is wound, a wrapper provided around the mandrel to guide winding of the coil, and a retractable wrapper, and around the mandrel. Alternatively, it is provided with a mandrel heating device which is provided inside and which heats the mandrel, and a coil end face heating device which is provided so as to face the end face of the coil wound around the mandrel and heats the coil end face.

[0020]

According to the invention of claim 1, on the outlet side of the reverse rolling mill, there is provided the heat retaining coiler for preventing the cooling of the coil and keeping the temperature of each part of the coil substantially uniform.
The reverse rolling machine can roll a coil to a thin plate thickness, and the coil is wound around a heat retaining coiler. Since the finish rolling mill performs finish rolling from the thin plate thickness wound on the heat-retaining coiler, the number of finish rolling mills is reduced and the length of the rolling line is shortened accordingly.

According to the second aspect of the present invention, since the heat retaining coiler is also provided on the inlet side of the reverse rolling mill, it is thinly rolled and wound around the heat retaining coiler on the inlet side and then rewound. It is further rolled by a reverse rolling mill and wound up on the heat retaining coiler on the outlet side. Since this can be rewound and charged into the finish rolling mill, the number of finish rolling mills can be reduced and the length of the rolling line can be shortened.

According to the third aspect of the present invention, the material to be rolled reversely rolled by the reverse rolling mill having a short length is thinned by heating the conveying equipment on the inlet side of the reverse rolling mill to keep the heat. Can be rolled up. Further, this is further forward-rolled by a reverse rolling mill, wound on an exit side heat retaining coiler, rewound, and charged into a finish rolling mill. As a result, the plate thickness loaded into the finish rolling mill becomes thin, the number of finish rolling mills decreases, and the rolling line can be shortened.

According to the invention of claim 4, the front stage of the finishing rolling mill train is used as a reverse rolling mill, and the rolling is carried out to a thickness of 20 mm or less, which requires heating at the last reverse rolling, and is wound on a heat retaining coiler. . The material to be rolled, which has been rewound from this, is finish-rolled by all the finish rolling mills. The thickness of the material to be rolled loaded into the finishing rolling mill train is 20 mm or less, which is thinner than the plate thickness loaded into the normal finishing rolling mill, so that the number of finishing rolling mills constituting the finishing rolling mill train is limited. Can be reduced,
Further, the length of the rolling line can be shortened.

According to the fifth aspect of the present invention, one reverse rolling mill performs from rough rolling to finish rolling, and when it is rolled to about 20 mm which requires heating, it is wound on a heat retaining coiler. Thereafter, it is wound up from the heat-retaining coiler at every forward rotation and reverse rotation, unwound, and rolled to about 1 mm. As a result, one reverse rolling mill performs rough rolling to finish rolling, so that the length of the rolling line can be greatly shortened.

According to the invention of claim 6, rough rolling is performed by one reverse rolling mill, and then finish rolling is performed by one reverse finishing rolling mill. When roughly rolled to about 20 mm, it is wound on a heat retaining coiler. The reverse finish rolling machine winds each time it rotates forward and reversely from the heat retaining coiler, unwinds it, and rolls it to about 1 mm. As a result, two reverse rolling mills perform rough rolling to finish rolling, so that the length of the rolling line can be greatly shortened. Further, since the reverse rolling mill and the reverse finishing rolling mill can be operated in parallel for some periods, the production efficiency is improved.

According to the invention of claim 7, rough rolling to finish rolling are performed by two reverse rolling mill trains, and when rolling is performed to about 20 mm which requires heating, it is wound on a heat retaining coiler. After that, the reverse rolling mill train is wound up from the heat-retaining coiler at every forward rotation and at every reverse rotation, unwound, and rolled to about 1 mm. As a result, the length of the rolling line can be significantly shortened because rough rolling to finish rolling are performed by the two reverse rolling mill trains.

According to the invention of claim 8, rough rolling is performed by one reverse rolling mill, and then finish rolling is performed by two reverse finishing rolling mill trains. When roughly rolled to about 20 mm, it is wound on a heat retaining coiler. In the reverse finishing rolling mill train, it is wound up from the heat-retaining coiler every time it rotates in the normal direction and every time it rotates in the reverse direction, and it is unwound and rolled to about 1 mm. As a result, since three reverse rolling mills perform rough rolling to finish rolling, the length of the rolling line can be greatly shortened. Further, since there is a period during which the reverse rolling mill and the reverse finishing rolling mill train can be operated in parallel, the production efficiency is improved.

According to the ninth aspect of the invention, a plurality of reverse rolling mill trains are rotated in the forward and reverse directions, and the material to be rolled is 2 as rough rolling.
A thickness of 0 mm or less is wound up on a heat retention coiler, then unwound from the heat retention coiler, the reverse rolling machine train is normally rotated, and finish rolling is performed up to about 1 mm. As a result, the range in which the rolling mill is installed is greatly reduced.

According to the tenth aspect of the invention, in the heat retention coiler, the coil is wound by using the mandrel, and the initial winding on the mandrel is surely wound by the wrapper roll. Therefore, even in the case of a thin plate, high-speed winding and rewinding can be performed. It will be possible. Further, since the mandrel is heated, cooling of the coil inner winding side is prevented, and heating of the end surface of the coil, which is easy to cool, prevents cooling of the coil, and the entire coil is kept at a substantially uniform temperature. As a result, the coil retains heat even if it is rolled to a thin thickness and wound into a coil, so rough rolling can be performed to a thin thickness, and the number of finish rolling mills can be reduced. Also,
1 unit or 2 units for finish rolling by using heat insulation coiler
The number of finishing rolling mills can be reduced by enabling the forward and reverse rotations by the rolling mill train of one table.

[0030]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing the configuration and rolling schedule of the first embodiment of the present invention. 90-60m from heating furnace 1
A material to be rolled 2 of about m is loaded into a reverse rolling mill R that performs normal rotation and reverse rolling. The heat retaining coiler 3 is installed on the inlet side and the outlet side of the reverse rolling mill R. Two or more heat retaining coilers 3 are provided on the outlet side. Accordingly, rough rolling by the reverse rolling mill R and finish rolling can be performed in parallel, which is suitable for mass production. For small-volume production, only one heat retaining coiler 3 on the outlet side is required. Further, when the material 2 to be rolled on the inlet side final pass to the reverse rolling mill R is thick, the inlet side heat retaining coiler 3 is not necessary. This rolled material 2
When the length is short, the inlet heat retaining coiler 3 may be the roller hearth described in the second embodiment. Finishing mills F1, F2, F3 consisting of three units are installed on the downstream side of the heat retaining coiler 3 on the output side of the reverse rolling mill R, and a down coiler for winding the rolled material 2 that has finished rolling on the output side. 4 are provided.

An example of the rolling schedule is shown on the lower side. The case where the material to be rolled 2 supplied from the heating furnace 1 in a thickness of 90 mm is rolled into a product of 1.6 mm is shown. When loaded into the reverse rolling mill R at 90 mm, 60 m by forward rolling.
m and then reverse rolled to 40 mm. Further, it is forward-rolled to 21 mm and wound by the heat retaining coiler 3. Reverse rolling is performed from 21 mm to 11 mm, and the coil is wound around the inlet heat retaining coiler 3. Next, it is rewound and forward-rolled to 6.5 m.
It is wound around the outlet heat retaining coiler 3 as m. Heat insulation coiler 3
After further unwinding, the finish rolling mill F1 rolls it to 3.3 mm, the finish rolling mill F2 rolls it to 2.1 mm, and the finish rolling mill F3 rolls it to a product thickness of 1.6 mm, and then winds it on the down coiler 4. When rolled to 25 mm or less, it is wound around the heat retaining coiler 3, so that cooling of the coil can be prevented.

Next, a second embodiment will be described. FIG. 2 is a diagram showing the configuration and rolling schedule of the second embodiment. The material to be rolled 2 supplied from the heating furnace 1 is loaded into a reverse rolling mill R that performs normal rotation and reverse rotation. A roller hearth furnace 5 is provided on the entrance side of the reverse rolling mill R. The roller hearth furnace 5 is a roller table with a heating burner that heats by placing a cover on a roller table that conveys the material to be rolled 2 and providing a burner on the cover. A heat-retaining coiler 3 is provided on the exit side of the reverse rolling mill R, and four finishing mills F1 to F4 are provided on the downstream side, and a down-coiler 4 for winding the rolled material 2 rolled on this exit side. Is provided. The number of finishing rolling mills is one more than that in the first embodiment because the thickness of the coil wound around the outlet heat retaining coiler 3 is twice as thick as that in the first embodiment.

The rolling schedule is 130 from the heating furnace 1.
It shows the case of supplying in mm and the case of supplying in 75 mm. Reverse rolling mill R when supplied at 130 mm
Forward rolling to 105mm, then reverse rolling to 75mm
mm. This is the same as if it were supplied at 75 mm. 75 mm is forward-rolled to 44 mm and reverse-rolled to 22 mm. Next, in order to prevent cooling, it is conveyed by a roller hearth furnace 5, then forward-rolled to 11 mm and wound on a heat retaining coiler 3. Next, it is rewound from the heat-retaining coiler 3 and rolled by a finishing rolling mill F1 to 6.5 mm, 3.3 mm by a finishing rolling mill F2, and a finishing rolling mill F3.
2.1 mm, and product thickness of 1.6 mm with finishing mill F4
Then, it is rolled into a down coiler 4. This embodiment is the first
The number of finish rolling mills is increased by one from the embodiment, but the number of heat retaining coilers 3 may be one.

Next, a third embodiment will be described. FIG. 3 shows the configuration and rolling schedule of the third embodiment. The material to be rolled 2 supplied from the heating furnace 1 is loaded into a first reverse rolling mill R1 and a second reverse rolling mill R2 that operate in tandem. A heat retaining coiler 3 is provided on the exit side of the second reverse rolling mill R2. Downstream of the heat retaining coiler 3, three finishing mills F1 to F3 are installed, and a down coiler 4 is provided on the outlet side thereof.

The rolling schedule shows a case where the product is fed by 120 mm and is rolled into a product of 1.6 mm. 120m
From m, it is rolled to 95 mm by the first reverse rolling mill R1 and 70 mm by the second reverse rolling mill R2. Next, by reverse rolling, 55m by the second reverse rolling machine R2
m to 30 mm by the first reverse rolling machine R1. Next, forward rolling is performed, 15 mm by the first reverse rolling machine R1 and 7.5 mm by the second reverse rolling machine R2.
It is rolled into a heat insulation coiler 3. Next, it is unwound from the heat retaining coiler 3 and then 4.5 m by the finish rolling mill F1.
m, 2.1 mm by finishing mill F2, finishing mill F3
Then, it is rolled to 1.6 mm and wound on the down coiler 4. In this embodiment, by using two reverse rolling mills, a material to be rolled having a thickness of 120 mm can be rolled by three finishing mills to 1.6 mm.

Next, a fourth embodiment will be described. FIG. 4 shows the configuration and rolling schedule of the fourth embodiment. In this embodiment, the two rolling mills in the front stage of the finish rolling mill are reverse rolling mills RF1 and RF2.
After performing rough rolling as, all rolling mills RF1, RF2, F
Finish rolling is performed at 3 and F4. The material to be rolled 2 supplied from the heating furnace 1 is forward-rotated and reverse-rolled by a first reverse finishing rolling mill RF1 and a second reverse finishing rolling mill RF2 which operate in tandem. A heat retaining coiler 3 is provided on the inlet side of the first reverse finish rolling mill RF1. The finish rolling mill train is composed of four units, and the down coiler 4 is provided on the exit side thereof.

The rolling schedule shows the case of supplying 90 mm and rolling to a product of 1.6 mm. 90 mm
Then, it is rolled to 60 mm by the first reverse finish rolling mill RF1 and 35 mm at the second reverse finish rolling mill RF2. Second reverse finishing mill RF2 by reverse rolling
Is rolled to 21 mm, further rolled to 11 mm by the first reverse finishing mill RF1, and then wound on the heat retention coiler 3. Next, the finish rolling is performed, and the material to be rolled 2 unwound from the heat retaining coiler 3 is rolled to 6.5 mm by the first reverse finishing rolling mill RF1 and the second reverse finishing rolling mill RF2.
With a finishing mill F3 to 2.1 mm and a finishing mill F4 to 1.6 mm.
To be wound up.

Next, a fifth embodiment will be described. FIG. 5 shows the configuration and rolling schedule of the fifth embodiment. In this embodiment, the reverse rolling machine R1 is used to perform rough rolling to finish rolling.
The material to be rolled 2 supplied from the heating furnace 1 is a reverse rolling mill R.
It is rolled normally and reversely. A heat retaining coiler 3 is provided on the inlet side and the outlet side of the reverse rolling mill R. A down coiler 4 is provided downstream of the heat retaining coiler 3 on the outlet side.

The rolling schedule shows the case where the product is supplied by 90 mm and is rolled into a product of 1.2 mm. 90 mm
By the reverse rolling mill R, the forward rolling is performed to 65 mm, and the reverse rolling is performed to 40 mm. Next, it is forwardly rolled to 22 mm and wound on the heat retention coiler 3. Next, it is rewound from the heat retention coiler 3 and reverse-rolled to 10.5 mm and wound on the heat retention coiler 3, and then rewound and forward-rolled to 5.5 mm and wound on the heat retention coiler 3. Next, it is rewound from this, and reverse-rolled to 3.1 mm to be wound on the heat-retaining coiler 3, and then unwound from this to forward-rolled to 2.0.
It is rolled up on the heat retaining coiler 3 after being made to be mm, unwound from this, and reverse-rolled and wound on the heat retaining coiler 3 at 1.5 mm.
Finally, rewinding and forward rolling from the heat retention coiler 3 to 1.2 m
m and wind up on a down coiler 4.

Next, a sixth embodiment will be described. FIG. 6 shows the configuration and rolling schedule of the sixth embodiment. In this embodiment, rough rolling is performed by one reverse rolling machine R and finish rolling is performed by one reverse finishing rolling machine RF. The material to be rolled 2 supplied from the heating furnace 1 is rotated in the forward direction and the reverse direction by the reverse rolling mill R to be roughly rolled. A reverse finishing rolling mill R provided with heat retaining coilers 3 on the inlet side and the outlet side downstream of the reverse rolling mill R.
F is provided, and each time of forward rotation and reverse rotation, the heat-retaining coiler 3 winds and rewinds, and finish rolling is performed in a heat-retained state. Down coiler 4 is located downstream of heat retaining coiler 3 on the outlet side.
Is provided. Since there is a period during which the reverse rolling mill R and the reverse finish rolling mill RF can be rolled in parallel, the production efficiency is improved.

The rolling schedule shows the case of supplying 90 mm and rolling to a product of 1.5 mm. 90 mm
By the reverse rolling mill R, the forward rolling is performed to 65 mm, and the reverse rolling is performed to 40 mm. Next, it is forwardly rolled to 22 mm and wound on the heat retention coiler 3. Next, the finish rolling is started, and it is rewound from the heat retention coiler 3 by the reverse finish rolling machine RF and forward-rolled to 10.5 mm, wound up on the heat retention coiler 3, and then rewound and reverse-rolled.
It is made 5 mm and wound around the heat retaining coiler 3. Next, it is rewound and forward-rolled to 3.1 mm to be wound on the heat retaining coiler 3, and then unwound and reverse-rolled to 2.0 mm to be wound on the heat retaining coiler 3. Finally, it is rewound and forward-rolled from the heat retaining coiler 3 to 1.5 mm and wound on the down coiler 4.

FIG. 7 shows another rolling schedule of the sixth embodiment. This rolling schedule shows the case where the product is supplied at 105 mm and is rolled to a product of 1.2 mm. 105m
80 mm after forward rolling by reverse rolling machine R from m
And reverse-rolled to 55 mm. Next, it is forward-rolled to 30 mm. Next, the finishing rolling by the reverse finishing rolling mill RF is started, and 30 mm is forwardly rolled to 20 mm.
And it is wound around the heat insulation coiler 3. Next, heat retaining coiler 3
Rewind and reverse-roll to 10.5 mm, and wind on the heat-retaining coiler 3, then rewind and forward-roll to 5.5 mm.
Then, wind it on the heat insulation coiler 3. Next, it is rewound and reverse-rolled to 3.1 mm to be wound on the heat retaining coiler 3, and then unwound and forward-rolled to 2.0 mm to be wound on the heat retaining coiler 3. Next, it is rewound and reverse rolled to 1.5 mm and wound on the heat retaining coiler 3, and finally, rewinding and forward rolling from the heat retaining coiler 3 to 1.2 mm and wound on the down coiler 4.

Next, a seventh embodiment will be described. FIG. 8 shows the configuration and rolling schedule of the seventh embodiment. In this embodiment, two reverse finishing mills RF1 and RF2 in tandem are used to perform rough rolling to finish rolling. The material to be rolled 2 supplied from the heating furnace 1 is a train of reverse finish rolling machines RF1, RF2.
It is rolled normally and reversely. A heat retaining coiler 3 is provided on the inlet side and the outlet side of the reverse finish rolling mill trains RF1 and RF2. A down coiler 4 is provided downstream of the heat retaining coiler 3 on the outlet side.

The rolling schedule shows the case of supplying 110 mm and rolling to a product of 1.2 mm. 110m
From m, it is normally rolled by the reverse finishing rolling mill trains RF1 and RF2 to 85 mm and 65 mm, and reversely rolled to 40 mm and 22 mm and wound on the heat retaining coiler 3. Next, it is rewound from the heat retention coiler 3 and forward-rolled.
It is wound on the heat retaining coiler 3 with a thickness of 5 mm and 5.5 mm, unwound from this and reverse-rolled to 3.1 mm and wound on the heat retaining coiler 3. Finally, it is rewound and forward-rolled from the heat retaining coiler 3 to 1.5 mm and 1.2 mm and wound on the down coiler 4.

Next, an eighth embodiment will be described. FIG. 9 shows the configuration and rolling schedule of the eighth embodiment. In this embodiment, rough rolling is performed by one reverse rolling machine R, and finish rolling is performed by the reverse finishing rolling mill trains RF1 and RF2. The material to be rolled 2 supplied from the heating furnace 1 is rotated in the forward direction and the reverse direction by the reverse rolling mill R to be roughly rolled. Downstream of the reverse rolling mill R, reverse finishing rolling mill trains RF1 and RF2 provided with heat retaining coilers 3 on the inlet side and the outlet side are provided, and are wound by the heat retaining coiler 3 at every forward rotation and every reverse rotation. Unwind and finish-roll while keeping heat. A down coiler 4 is provided downstream of the heat retaining coiler 3 on the outlet side. Since there is a period during which the reverse rolling mill R and the reverse finishing rolling mill trains RF1 and RF2 can be rolled in parallel, the production efficiency is improved.

The rolling schedule shows the case where the product is supplied at 90 mm and is rolled into a product of 1.2 mm. 90 mm
By the reverse rolling mill R, the forward rolling is performed to 65 mm, and the reverse rolling is performed to 40 mm. Next, it is forwardly rolled to 22 mm and wound on the heat retention coiler 3. Next, the finish rolling is started and the reverse finish rolling machine trains RF1 and RF2 are used to rewind from the heat-retaining coiler 3 and forward-roll to 10.5 m.
m, 5.5 mm and wound on the heat retention coiler 3, then rewound from this and reverse-rolled to 3.1 mm and 2.0 and wound on the heat retention coiler 3. Finally, it is rewound and forward-rolled from the heat retaining coiler 3 to 1.5 mm and 1.2 mm and wound on the down coiler 4.

Next, a ninth embodiment will be described. FIG. 10 shows the ninth
The structure of an Example and a rolling schedule are shown. In this embodiment, rough rolling and finish rolling are performed by the reverse rolling mill trains R1, R2 and R3. The material to be rolled 2 supplied from the heating furnace 1 is roughly rolled by reversely rotating and reversely rotating the reverse rolling mill trains R1 to R3. A heat retention coiler 3 is provided on the inlet side of the reverse rolling mill rows R1 to R3, and heat retention is required by reverse rolling 20
When it becomes less than or equal to mm, it is wound by the heat insulation coiler 3, then rewound and finish-rolled. Reverse rolling mill row R1
A down coiler 4 for winding the material to be rolled 2 that has been subjected to finish rolling is provided on the exit side of R3. The reverse rolling mill trains R1 to R3 are arranged together, and the rolling work is performed at the same time, which simplifies the system. Heat insulation coiler 3
Since only one is required, the device becomes simple.

Rolling schedules are 120 mm and 90 m
It is supplied in m and both are rolled into a product of 1.2 mm. The numbers in parentheses indicate the case of 90 mm supply. From 120 mm, it is normally rolled by the reverse rolling machine R1 to be 90 mm, and is normally rolled by R2 and R3 to be 62 mm and 34 mm, respectively. Then R3, R
2 and R1 are reverse rolled to 21mm and 10.5 respectively
mm and 5.5 mm, and wound up on the heat retaining coiler 3.
Next, it is unwound from the heat retaining coiler 3 and is forward-rolled by R1, R2, and R3, and is 2.9 mm, 1.6 mm,
It becomes 2 mm and is wound up on the down coiler 4. 9
When supplied at 0 mm, R1 is obtained by the first forward rolling.
~ R3, rolled to 63 mm, 38 mm, and 34 mm, respectively, and thereafter, the same as in the case of supplying 120 mm. In this case, the rolling ratio by R3 is adjusted to be small.

Next, a tenth embodiment will be described. FIG. 11 shows the configuration and rolling schedule of the tenth embodiment. In this embodiment, rough rolling and finish rolling are performed by the reverse rolling mill trains R1, R2, R3 and R4. The material to be rolled 2 supplied from the heating furnace 1 is roughly rolled by reversely rotating and reversely rotating the reverse rolling mill trains R1 to R4. During forward rolling, R3 and R4 are only passed or lightly reduced. A heat retaining coiler 3 is provided on the inlet side of the reverse rolling mill trains R1 to R4, and when the temperature is 20 mm or less that requires heat retention due to reverse rolling, the heat retaining coiler 3 winds up.
Next, rewinding is performed and finish rolling is performed. On the exit side of the reverse rolling mill trains R1 to R4, a down coiler 4 for winding the material to be rolled 2 that has been subjected to finish rolling is provided. As in the ninth embodiment, the reverse rolling mill trains R1 to R4 are arranged together and the rolling work is performed simultaneously, so that the system is simplified. Further, since the heat retaining coiler 3 may be one, the device becomes simple. Also, since there is one more rolling mill than in the ninth embodiment, a thin coil can be obtained.

The rolling schedule shows the case where the product is fed by 120 mm and both are rolled into 0.8 mm products. 12
9 mm after 0 mm rolling in the normal direction by the reverse rolling machine R1
It becomes 0 mm, and it is forward rolled by R2 and each 62
mm, and R3 and R4 are passed only or lightly pressed and the plate thickness does not change. Then reverse rolled to R4, R3, R2, R1 to 34mm, 21mm, 10.1m respectively.
It becomes m, 5.5 mm and is wound around the heat retaining coiler 3. Next, it is unwound from the heat retaining coiler 3 and is R1, R2, R3, R4.
Are forward rolled by 2.9 mm, 1.6 mm,
It becomes 1.2 mm and 0.8 mm and is wound up by the down coiler 4. Although the heat retaining coiler 3 is used in the fifth to tenth embodiments, the roller hearth furnace described in the second embodiment may be provided, and a heater is used instead of the heating burner such as the roller hearth furnace. It may be used as thin plate heater equipment.

Next, the heat retaining coilers used in the above-described first to tenth embodiments will be described as the eleventh and twelfth embodiments. 12 and 13 show an eleventh embodiment, and FIG.
2 shows a state in which the heating body wraps around the mandrel and is heating, and FIG. 13 shows a state in which the heating body is opened and retracted from the mandrel. Around the mandrel 11, three wrappers 12 are provided, and the coil 8 is attached to the mandrel 11 in the first two.
During winding for 3 turns, the coil 8 is guided at the position shown in FIG. 13 and then retracted to the position shown in FIG. Rapper 1
2 has a rotation center 13 at one end and a mandrel 11 at the other end.
An arm 15 having a guide portion 14 having substantially the same circular arc as the outer circumference of, a wrapper roll 16 provided near the guide portion 14, and a cylinder (not shown) for rotating the arm 15 around the rotation center 13. The material 2 to be rolled moves on the transport table 17, and is guided by the guide roll 18 to the mandrel 11
To be wound up. At the time of rewinding, the guide roll 18 and the drive roll 19 form a pair to form the pinch roll 50, and rewinding is performed. It should be noted that rewinding in the opposite direction of winding is also possible.

Below the mandrel 11, the mandrel 1
1. An elevating device 20 is provided for supporting the mandrel 11 during replacement and for supporting the coil 8 when removing the coil 8. The elevating device 20 is provided with a base 21, a hollow cylinder 22 slidably fitted in a shaft opening provided in the base 21 in the vertical direction, and a hollow cylinder 22 provided on the top of the hollow cylinder 22.
It is composed of a support member 23 for supporting the hollow cylinder 22 and an elevating cylinder 24 that is provided in the hollow portion of the hollow cylinder 22 and the shaft opening of the base 21 and that moves the hollow cylinder 22 up and down.

A mandrel heating device 25 is provided on the support member 23 of the lifting device 20. The heating device 25 includes a support member 23 and a base portion 26 slidably fitted in the vertical direction,
An arc-shaped lower heating element 27 fixed to the base portion 26, and an arc-shaped upper heating element 28 pin-joined to the lower heating element 27
And the cylinder end is rotatably connected to the base portion 26,
The rod end is rotatably coupled to the upper heating body 28, and is connected to the opening / closing cylinder 29 that opens and closes the upper heating body 28, the top of the base 21 of the lifting device 20 and the lower surface of the base 26 of the heating device 25. It is composed of an elevating cylinder 30 for elevating the part 26.

The main heating device 25 heats the mandrel 11 before the start of coil winding to prevent cooling of the coil inner winding side, and is used with the wrapper 12 retracted.
During coil winding and rewinding, the coil is retracted below the mandrel 11 as shown in FIG. The lower heating element 27 and the upper heating element 28 are provided with a resistance heating coil, an induction heating coil, or a radiant heating heating element inside. It should be noted that this embodiment is used together with a coil end face heating device of a twelfth embodiment described later.

Next, the heat retaining coiler of the twelfth embodiment will be described. 14 shows a sectional view of this embodiment, and FIG. 15 shows FIG.
FIG. The apparatus of this embodiment is a mandrel 1
1 and the end surface of the coil are heated. One end of the mandrel 11 is detachably coupled to the rotary drive device 32, and the other end is pivotally supported by a detachable outer support member 33. Outer support 3
Reference numeral 3 denotes an eccentric bearing 34, which pivotally supports the mandrel 11. The eccentric bearing 34 and the mandrel 11 can be fixed and removed by a wedge 35. The mandrel 11 is composed of a hollow shaft, and a combustion device 36 is attached to the hollow portion by a supporting member 37 with a space from the inner surface of the mandrel 11, and the supporting member 37 is supported by an external supporting member 33. .

An exhaust opening 38 is provided near the coil end position of the mandrel 11 so that the combustion exhaust gas from the combustion device 36 is discharged along the coil end surface. In addition, a bearing 39 that axially supports a heating device for the coil end surface, which will be described later.
Is provided.

A coil end face heating device 40 is provided on both end faces of the coil to heat the coil end face and prevent cooling.
The coil end face heating device 40 has a heating body, and the heating body is a short cylinder having an opening for coupling with the mandrel 11 at the center, and one end face is closed by a side plate to form a combustion chamber 41,
Radiators 42 are provided in a grid pattern on the other end surface. The heating device 40 is pivotally supported by the bearing 39 of the mandrel 11, but the mandrel 11 rotates and the heating device 40 is stationary. The heating device 40 is divided into two horizontally, and the mandrel 1
It can be attached to and removed from 1. The heating device 40 on the upper side is attached and detached by a pulley 43, and the heating device 40 on the lower side is moved up and down by an elevator 44. An adjusting cylinder 45 that expands and contracts in the axial direction of the mandrel 11 is provided, and the heating device 40 is adjusted according to the width of the coil 8. Although not shown in FIG. 14 in this embodiment, the wrapper 12 shown in FIGS. 12 and 13 is provided.

Next, the operation of the twelfth embodiment will be described. Before the coil winding is started, the combustion gas in which the air is premixed is blown into the mandrel 11 from the combustion device 36 and burned to heat the mandrel 11. Wrapper 1 at this time
2 is set on the surface of the mandrel, and is set according to the width of the coil on which the heating device 40 on the end face of the coil is wound. In setting the heating device 40 for the coil end surface, first, the lower heating device 40 is raised to a prescribed position by the elevator 44,
After that, the upper heating device 40 is lowered by a pulley 43, both are integrally connected, and then the cylinder 45 is moved to a position corresponding to the coil width. Next, the winding of the coil 8 is started, the coil 8 is wound around the mandrel 11 for 2 to 3 turns, and then the wrapper 12 is retracted. Before or after this, the combustion gas is supplied to the combustion chamber 41 and burned to heat the radiant body 42, and the radiant heating of the coil end surface is performed. The heating of the mandrel 11 by the combustion device 36 may be performed until the coil winding is started as in the first embodiment, but may be heated during the winding and rewinding if necessary. When the winding is completed, the rewinding is performed, and the coil end surface is heated by the heating device 40 during the rewinding.

The coil 8 that has been wound up and the coil 8 that is being wound up are not normally taken out, but they may be taken out when an accident or the like occurs. In this case, the heating device 40
Is separated and removed by the pulley 43 and the elevator 44, and then the coil 8 is supported by the elevator 20 provided below the mandrel 11. Next, after removing the combustion device 36, the wedge 3 connecting the outer support member 33 and the mandrel 11 to each other.
5 is removed, the external support material 33 is removed from the mandrel 11, and taken out by a crane or the like not shown. Mandrel 1
The same applies when replacing 1.

In this embodiment, the heating device 40 for the coil end surface heats the radiant body by the combustion gas to perform the radiant heating. However, the combustion chamber 41 is formed of a disk, and the resistance heating device and An induction heating device may be provided. Further, the pulley 43 and the elevator 44 are used as a device for setting the heating device 40 to the mandrel 11, but other lifting equipment such as a crane may be used. Although the heating device 40 is divided into two parts in the horizontal direction, it may be divided into two parts vertically, or may be divided into three parts or four parts if necessary.

[0061]

As is apparent from the above description, according to the present invention, a rough rolled material that has been roughly rolled is rolled by a heat-retaining coiler to be rolled to a thin thickness by rough rolling. Therefore, the number of finishing rolling mills can be reduced and a rolling facility with a shortened rolling line can be realized. Also, the thin plate for finish rolling can be heat-retained by the heat-retaining coiler, so that it can be forward-rotated and reverse-rolled, and can be finished-rolled by one or two tandem reverse-finishing mills. Can be significantly reduced. Further, by performing rough rolling and finish rolling by one or a plurality of tandem reverse rolling mills, the rolling equipment can be significantly reduced. In addition, the mandrel and the wrapper are used to securely fix the coil tip to the mandrel to enable high-speed winding and rewinding of the thin plate, the heating of the mandrel prevents cooling on the winding side of the coil, and the heating of the coil end surface causes the coil end surface to cool. A heat-retaining coiler that prevents cooling is realized.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration and a rolling schedule according to a first embodiment of the present invention.

FIG. 2 is a diagram showing a configuration and a rolling schedule of a second embodiment of the present invention.

FIG. 3 is a diagram showing the configuration and rolling schedule of a third embodiment of the present invention.

FIG. 4 is a diagram showing the configuration and rolling schedule of a fourth embodiment of the present invention.

FIG. 5 is a diagram showing the configuration and rolling schedule of a fifth embodiment of the present invention.

FIG. 6 is a diagram showing the configuration and rolling schedule of a sixth embodiment of the present invention.

FIG. 7 is a diagram showing another rolling schedule according to the sixth embodiment of the present invention.

FIG. 8 is a diagram showing the configuration and rolling schedule of a seventh embodiment of the present invention.

FIG. 9 is a diagram showing the configuration and rolling schedule of an eighth embodiment of the present invention.

FIG. 10 is a diagram showing the structure and rolling schedule of a ninth embodiment of the present invention.

FIG. 11 is a diagram showing the structure and rolling schedule of a tenth embodiment of the present invention.

FIG. 12 is a view showing a state where the mandrel is kept warm by the heat retaining coiler of the eleventh embodiment of the present invention.

FIG. 13 is a view showing the initial state of winding with the heat retention coiler of the eleventh embodiment of the present invention.

FIG. 14 is a diagram showing a heat retaining coiler according to a twelfth embodiment of the present invention.

15 is a view on arrow AA of FIG.

FIG. 16 is a diagram showing a conventional rolling facility.

FIG. 17 is a diagram showing another conventional rolling facility.

FIG. 18 is a diagram showing a configuration of a conventional winding and rewinding machine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Heating furnace 2 Rolled material 3 Heat retention coiler 4 Down coiler 5 Roller hearth furnace (heat retention equipment) 8 Coil 11 Mandrel 12 Wrapper 13 Rotation center 14 Guide part 15 Arm 16 Wrapper roll 17 Conveying table 18 Guide roll 19 Drive roll 20 Lifting device 21 Foundation table 22 Hollow cylinder 23,37 Supporting material 24,30 Lifting cylinder 25 Mandrel heating device 26 Foundation part 27 Lower heating element 28 Upper heating element 29 Opening / closing cylinder 32 Rotation drive device 33 External support material 34 Eccentric bearing 35 Wedge 36 Combustion device 38 Exhaust opening 39 Bearing 40 Coil end face heating device 41 Combustion chamber 42 Radiator 43 Pulley 44 Elevator installation 45 Adjustment cylinder 50 Pinch roll R Reverse rolling mill RF reverse finishing mill

Claims (10)

[Claims] 1. A material to be rolled supplied from a heating furnace is normally rotated,
A reverse rolling mill that reverse-rolls, a heat retaining coiler that is provided on the exit side of the reverse rolling mill and that keeps the temperature of each part of the coil substantially even and winds and rewinds, and the heat retaining coil that is provided downstream of the heat retaining coiler. A rolling mill, comprising: a finishing rolling mill train for finishing rolling the material to be rolled unwound from a coiler. 2. The rolling equipment according to claim 1, further comprising a heat-retaining coiler provided on the inlet side of the reverse rolling mill to keep the temperature of each part of the coil substantially uniform and to wind and unwind the coil. . 3. The rolling apparatus according to claim 1, wherein the material-to-be-rolled material conveying equipment on the inlet side of the reverse rolling mill is provided with heat-retaining equipment for heating and heat-retaining the material-to-be-rolled. Facility. 4. A finish rolling mill train for finishing rolling a material to be rolled supplied from a heating furnace, and a coil provided on the inlet side of the finish rolling mill train is kept substantially evenly heated to perform rewinding. A rolling mill comprising a heat-retaining coiler, and the preceding stage of the finish rolling mill train is constituted by a reverse rolling mill that performs forward and reverse rolling. 5. The material to be rolled supplied from the heating furnace is normally rotated,
A reverse rolling machine that reverses and performs rough rolling to finish rolling, and a heat retaining coiler that is provided on each of the input side and the output side of the reverse rolling machine to heat the temperature of each coil portion substantially evenly and to wind and unwind. Rolling equipment characterized by having. 6. A material to be rolled supplied from a heating furnace is normally rotated,
A reverse rolling machine that reverses and rough-rolls, and a reverse finishing rolling machine that is provided on the downstream side of the reverse rolling machine to perform normal rolling, reverse rotation, and finish rolling, the reverse rolling machine, and the reverse finishing rolling. And a heat-retaining coiler that is provided downstream of the reverse finishing rolling mill and that keeps the temperature of each part of the coil substantially uniform and winds and unwinds the rolling mill. 7. The material to be rolled supplied from the heating furnace is normally rotated,
Two reverse rolling mill trains arranged in a row to reverse and perform rough rolling to finish rolling, and windings are provided at the inlet side and the output side of the reverse rolling mill trains while keeping the temperature of each part of the coil substantially uniform. A rolling facility equipped with a heat retaining coiler for rewinding and rewinding. 8. The material to be rolled supplied from the heating furnace is normally rotated,
A reverse rolling mill that reverses and rough-rolls, and two reverse finishing rolling mill trains that are provided on the downstream side of the reverse rolling mill and that perform normal rolling and reverse rolling of the material to be rolled and perform finishing rolling, A heat-retaining coiler, which is provided between the reverse rolling mill and the reverse finishing rolling mill train and downstream of the reverse finishing rolling mill train, heat-rewinds and rewinds the heat of each part of the coil substantially evenly, respectively. Rolling equipment characterized by 9. The material to be rolled supplied from the heating furnace is normally rotated,
A plurality of reverse rolling mill trains arranged in a line that reverses and performs rough rolling to finish rolling, and the coil windings are provided at the inlet side of the reverse rolling mill train to keep the temperatures of the coil parts substantially uniform and to rewind and rewind. A rolling facility equipped with a heat-retaining coiler. 10. The heat retaining coiler is provided around a mandrel around which a coil is wound, a wrapper that is provided around the mandrel and can guide winding of the coil and retract, and a mandrel that is provided around or inside the mandrel. 10. A mandrel heating device for heating a coil, and a coil end surface heating device provided to face an end surface of a coil wound around the mandrel and heating the coil end surface. Rolling equipment described in.