JP3487371B2 - 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 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 high speed and has heat retaining properties, and at the same time, by performing reverse rolling to finish rolling by using this heat retaining coiler, a rolling facility with a significantly shortened rolling line is provided. The purpose is to provide.

[0010]

In order to achieve the above-mentioned object, the invention of claim 1 provides a finishing rolling mill train for finishing rolling a material to be rolled supplied from a heating furnace, and an entry side of the finishing rolling mill train. heated substantially uniformly coercive each part of the coil provided, and a heat retaining coiler returning is performed reeling, preceding the finish rolling mill train is composed of forward, reverse rolling reverse rolling mill, before
The heat insulation coiler has a coil wound around the outer periphery and burned inside.
Hollow mandrel for circulating burning gas and the mandrel
Provided around the coil to guide coil winding and retract
Possible wrapper and the mandrel before starting the winding of the coil
Winding the coil by surrounding the rel and heating the mandrel
A mandrel heating device that retracts from the mandrel during rewinding.
And the end face of the coil wound around the mandrel
It is installed facing the mandrel and detachable from the mandrel.
Equipped with a coil end face heating device that radiatively heats the coil end face.
The mandrel has a combustion gas inside the mandrel.
From along the coil end face is obtained by a so that the have a discharge opening for discharging.

Further, the invention of claim 2 is a reverse rolling machine 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, 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, respectively,
The heat retaining coiler has a coil wound around the outer periphery
A hollow mandrel through which combustion gas flows, and the mandrel
Are installed around the coil to guide and retract the winding of the coil.
The avoidable wrapper and the manipulator before starting the winding of the coil.
Winding the coil by enclosing the mantle and heating the mandrel
Mandrel heating that retracts from the mandrel during rewinding
Device and end face of coil wound on said mandrel
It is provided to face the mandrel and is detachable from the mandrel.
And a coil end face heating device for radiatively heating the coil end face.
The mandrel comprises a combustion gas within the mandrel.
Part has an exhaust opening for exhaust along the coil end surface
It was done so.

Further, the invention of claim 3 provides 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. 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. A heat retaining coiler that heats and winds and unwinds is provided, and the heat retaining coiler,
Wrap a coil around the outer circumference to allow combustion gas to flow inside
A hollow mandrel and provided around the mandrel,
A wrapper that guides the winding of the coil and can retract.
Enclose the mandrel before starting winding the coil.
The mandrel is heated and the mandrel is
The mandrel heating device that retracts from the
The end face of the coil wound around the
It is detachably attached to the rel and radiates the end surface of the coil.
A coil end face heating device for heating, and the mandrel
The combustion gas from inside the mandrel to the end face of the coil.
It has an exhaust opening for discharging .

Further, the invention of claim 4 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 provided on each of the inlet side and the outlet side of the reverse rolling mill train to keep the temperature of each part of the coil substantially uniform and to wind and unwind, the heat retaining coiler
While winding a coil around the circumference and circulating combustion gas inside
An empty mandrel and a
Wrapper that guides the winding of the ile and can be retracted,
The mandrel is surrounded by the mandrel before the start of winding
The mandrel is heated during the coil winding and rewinding by heating the drel.
Mandrel heating device retracting from the
The end face of the coil wound around the
It is detachably attached to the coil and radiates the coil end face.
And a coil end face heating device for heating the mandrel.
The combustion gas from inside the mandrel to the end face of the coil.
It has an exhaust opening for discharging .

Further, the invention of claim 5 provides 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. 2 arranged in a line to perform forward rolling, reverse rotation and finish rolling
Reverse finishing rolling mill train, and between the reverse rolling mill and the reverse finishing rolling mill train, and downstream of the reverse finishing rolling mill train, respectively, the temperature of each part of the coil is kept substantially even and the winding and rewinding are performed. And a heat retaining coiler that
The heat retaining coiler has a coil wound around the outer periphery.
A hollow mandrel for circulating combustion gas inside the casing,
Provided around the mandrel to guide coil winding
And retractable wrapper and before starting coil winding
Surround the mandrel and heat the mandrel to
Mandrel retracted from the mandrel during rewinding and rewinding
Rel heating device and carp wrapped around the mandrel
Facing the end surface of the mandrel and removable from the mandrel.
The end face of the coil is heated by radiantly heating the end face of the coil.
And a mandrel for supplying combustion gas to the mandrel.
Exhaust opening that discharges along the coil end surface from inside the rel
It has a mouth .

Further, the invention of claim 6 includes a plurality of reverse rolling mill trains 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 provided on the inlet side of the reverse rolling mill row to keep the temperature of each part of the coil substantially uniform and perform rewinding and rewinding, and the heat-retaining coiler has a coil on the outer peripheral part.
Hollow mandrel for circulating combustion gas inside the winding
And around the mandrel, coil winding
Wrapper that can guide and retract the coil and open the coil
Before starting, surround the mandrel and heat the mandrel
And retract from the mandrel during coil winding and rewinding.
Mandrel heating device and the mandrel
Facing the end surface of the coil and attached to and detached from the mandrel
Coil which is provided so as to radiatively heat the end face of the coil
And an end face heating device, the mandrel
Eject from the inside of the mandrel along the coil end surface
It has an exhaust opening .

[0016]

[0017]

According to the invention of claim 1, 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 time of the last reverse rolling and is wound up 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. The length of the rolling line can be shortened significantly. Heat retaining carp
Ra wound the coil with a mandrel,
The initial wrapping around the wrapping is securely wrapped by the wrapper roll
Since it can be wound, high-speed winding and rewinding is possible even with thin plates
Become. In addition, the mandrel and the combustion gas flowing inside
Of the mandrel heating device surrounding the outer circumference of
Prevents the inner coil side from being cooled, and
By heating the end surface of the coil, it prevents the coil from cooling and
The entire package is kept at a substantially uniform temperature. This makes it thinner
Even if it is rolled up and wound into a coil, the coil retains heat.
Therefore, the number of finishing rolling mills can be reduced by rough rolling to a thin thickness.
Can be reduced. Also, by using a heat retaining coiler, finishing
In rolling, one or two rolling mills can be used for normal rotation and reverse rotation.
It is possible and the number of finish rolling mills can be reduced. In addition,
The end face heating device is detachably attached to the mandrel.
The coil is removed when an accident occurs.
Easy to remove.

According to the second aspect of the present invention, one reverse rolling mill performs rough rolling to finish rolling, and when it is rolled to about 20 mm which requires heating, it is wound around the 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.
The heat retention coiler uses a mandrel to wind the coil and
Wrapper roll ensures initial winding around the ndrel
Since it is wound around, high-speed winding and rewinding even for thin plates
Will be possible. Combustion flowing through the mandrel
A mandrel heating device that surrounds the gas and its circumference
As it heats up, the coil inner winding side is prevented from cooling and
Prevents coil cooling by easily heating the end surface of the coil
However, the entire coil is kept at a substantially uniform temperature. to this
The coil retains heat even when rolled to a thinner thickness and wound into a coil
Therefore, rough rolling can be performed to a thin thickness, and finish rolling can be performed.
The number of machines can be reduced. In addition, by using a heat insulation coiler
In finish rolling, one or two rolling mill trains
The number of finishing rolling mills can be reduced because it is possible to rotate and reverse.
In addition, the coil end face heating device is removable from the mandrel.
Because it is possible, in case of accident etc.
The coil can be easily removed.

According to the invention of claim 3, 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. The heat insulation coiler
Winding the coil using a mandrel, initializing the mandrel
Make sure to wrap it with a wrapper roll
Thus, high-speed winding and rewinding can be performed even with a thin plate.
In addition, the combustion gas flowing inside the mandrel and its outer circumference
Since it is heated by the mandrel heating device that surrounds the
Cooling of the inner winding side of the coil is prevented and
The end face is heated to prevent the coil from cooling, and the entire coil is
Is kept at a substantially uniform temperature. This makes it possible to reduce the pressure
Even if it is rolled up and wound into a coil, the coil retains heat
The number of finishing rolling mills can be reduced by rough rolling to thin.
Can be reduced. Also, by using a heat insulation coiler, finish rolling
With 1 or 2 rows of rolling mills, normal rotation and reverse rotation are possible
Therefore, the number of finishing rolling mills can be reduced. Furthermore, the coil
The end face heating device is provided so as to be detachable from the mandrel.
The coil is removed when an accident occurs.
It is easy to do.

According to the invention of claim 4, rough rolling to finish rolling are carried out by the two reverse rolling mill trains, and when rolling to about 20 mm where heating is required, it is wound around the 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. Heat insulation coiler is a mandrel
Winding the coil using the cable and initial winding on the mandrel
Wraps securely with a wrapper roll, so
Even in this case, high-speed winding and rewinding are possible. Again mand
Encloses the rel around the combustion gas flowing inside and the outer circumference
Since it is heated by the mandrel heating device, the coil winding side
Cooling of the coil is prevented, and the end face of the coil is easily cooled.
Prevents the coil from cooling and makes the entire coil almost uniform
Is kept at a proper temperature. This makes it possible to roll it to a thin thickness
The coil retains heat even when wound into a roll, so
It can be rolled to a thin thickness and the number of finish rolling mills can be reduced. Well
In addition, by using a heat retention coiler
Is capable of normal rotation and reverse rotation by two rolling mill rows, and finishing pressure
The number of deferred machines can be reduced. Furthermore, coil end face heating device
Is detachably attached to the mandrel,
It is easy to remove the coil in case of an accident.
It

According to the invention of claim 5, 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. Heat retention coiler
-The mandrel is used to wind the coil and move to the mandrel.
Securely wraps the initial winding of the wrapper
Therefore, high-speed winding and rewinding is possible even with thin plates.
It In addition, the mandrel and the combustion gas flowing inside
It is heated by a mandrel heating device that surrounds the outer circumference.
Prevents the inner coil side from being cooled, and
By heating the end surface of the coil, it prevents the coil from cooling and
The entire package is kept at a substantially uniform temperature. This makes it thinner
Even if it is rolled up and wound into a coil, the coil retains heat.
Therefore, the number of finishing rolling mills can be reduced by rough rolling to a thin thickness.
Can be reduced. Also, by using a heat retaining coiler, finishing
In rolling, one or two rolling mills can be used for normal rotation and reverse rotation.
It is possible and the number of finish rolling mills can be reduced. In addition,
The end face heating device is detachably attached to the mandrel.
The coil is removed when an accident occurs.
Easy to remove.

According to the invention of claim 6, a plurality of reverse rolling mill rows are normally or reversely rotated, and the material to be rolled is rough rolled to a thickness of 20 mm or less and wound around a heat retaining coiler, and then the heat retaining coiler. After unwinding, the reverse rolling mill train is rotated in the forward direction, 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. Heat retention coiler
-The mandrel is used to wind the coil and move to the mandrel.
Securely wraps the initial winding of the wrapper
Therefore, high-speed winding and rewinding is possible even with thin plates.
It In addition, the mandrel and the combustion gas flowing inside
It is heated by a mandrel heating device that surrounds the outer circumference.
Prevents the inner coil side from being cooled, and
By heating the end surface of the coil, it prevents the coil from cooling and
The entire package is kept at a substantially uniform temperature. This makes it thinner
Even if it is rolled up and wound into a coil, the coil retains heat.
Therefore, the number of finishing rolling mills can be reduced by rough rolling to a thin thickness.
Can be reduced. Also, by using a heat retaining coiler, finishing
In rolling, one or two rolling mills can be used for normal rotation and reverse rotation.
It is possible and the number of finish rolling mills can be reduced. In addition,
The end face heating device is detachably attached to the mandrel.
The coil is removed when an accident occurs.
Easy to remove.

[0023]

[0024]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference examples and 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 a first reference example of the present invention. 9 from heating furnace 1
A material 2 to be rolled having a size of 0 to 60 mm is loaded into a reverse rolling mill R that performs forward rotation and reverse rotation. 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. When the material to be rolled 2 is short, the inlet side 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 reference example will be described. Figure 2 is the second visit
Is a diagram showing the configuration and the rolling schedule of Reference Example. 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 reference example will be described. FIG. 3 shows the configuration and rolling schedule of the third reference example. 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 the case of supplying 120 mm and rolling to 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, the first embodiment will be described. FIG. 4 shows the configuration and rolling schedule of the first 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 a case where the product is fed by 90 mm and is rolled into 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 second embodiment will be described. FIG. 5 shows the configuration and rolling schedule of the second 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 a case where the product is supplied at 90 mm and rolled to 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 third embodiment will be described. FIG. 6 shows the configuration and rolling schedule of the third 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 third 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 fourth embodiment will be described. FIG. 8 shows the configuration and rolling schedule of the fourth 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, a fifth embodiment will be described. FIG. 9 shows the configuration and rolling schedule of the fifth 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 fed 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, 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 sixth embodiment will be described. FIG. 10 shows the sixth
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.

The rolling schedule is 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 seventh embodiment will be described. FIG. 11 is the seventh
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, R3 and R4. Rolled material 2 supplied from heating furnace 1
Is reverse-rolled and reverse-rolled in the reverse rolling mill trains R1 to R4 for rough rolling. During forward rolling, R3 and R4 are only passed or lightly reduced. A heat retention coiler 3 is provided on the inlet side of the reverse rolling mill rows R1 to R4, and heat retention is required by reverse rolling.
When it becomes 0 mm or less, it is wound by the heat retention coiler 3, then rewound and finish-rolled. Reverse rolling mill row R
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 1 to R4. 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 sixth embodiment, a thin coil can be obtained.

The rolling schedule shows a 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 seventh embodiments will be described as the eighth and ninth embodiments. 12 and 13 show the eighth embodiment, FIG. 12 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. Three wrappers 12 are provided around the mandrel 11, and the coil 8 is wound on the mandrel 11 for the first two to three turns.
During winding, the coil 8 is guided at the position shown in FIG. 13 and then retracted to the position shown in FIG. The wrapper 12 has an arm 15 having a center of rotation 13 at one end and a guide portion 14 at the other end having an arc substantially the same as the outer circumference of the mandrel 11.
And 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 to be rolled 2 is the transport table 1
7 and is wound around the mandrel 11 by the guide roll 18. Guide roll 18 and drive roll 1 when rewinding
9 form a pair to form a pinch roll 50, and rewind. 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 ninth embodiment will be explained. 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 ninth 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. At this time, the wrapper 12 is set on the surface of the mandrel and set according to the width of the coil on which the heating device 40 on the coil end surface is wound. In setting the heating device 40 for the coil end face, first, the lower heating device 40 is raised to a prescribed position by the elevator 44, and the upper heating device 40 is lowered by the pulley 43, and both are integrally joined. After that, the cylinder 45 is moved to a position corresponding to the coil width. Next, the winding of the coil 8 is started and 2
After wrapping about 3 rolls on the mandrel 11, 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. In addition, the mandrel 1 by the combustion device 36
The heating of No. 1 may be performed until the coil winding is started as in the first reference example, 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 or the coil 8 that is being wound up is not normally taken out, but it 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 the present embodiment, the heating device 40 for the end face of the coil is designed to heat the radiant body by the combustion gas to perform radiant heating, but the combustion chamber 41 is formed of a disk, and a resistance heating device or 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.

[0055]

As is apparent from the above description, since a thin plate for finish rolling can be heat-retained by a heat-retaining coiler, it is possible to perform forward rotation and reverse rolling, and one or two tandem reverse finishing rollings can be performed. The finishing rolling can be performed by the rolling mill, and the finishing rolling mill 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 of a first reference example of the present invention.

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

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

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

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

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

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

FIG. 8 is a diagram showing a configuration and rolling schedule of a fourth example of the present invention.

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

FIG. 10 is a diagram showing the configuration and rolling schedule of a sixth embodiment of the present invention.

FIG. 11 is a diagram showing the configuration and rolling schedule of a seventh embodiment of the present invention.

FIG. 12 is a view showing a state in which a mandrel is kept warm by a heat retaining coiler according to an eighth embodiment of the present invention.

FIG. 13 is a diagram showing a state of the initial stage of winding with the heat retention coiler of the eighth embodiment of the present invention.

FIG. 14 is a view showing a heat retaining coiler according to a ninth 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]

1 heating furnace 2 Rolled material 3 heat retaining coiler 4 down coiler 5 Roller hearth furnace (heat retention equipment) 8 coils 11 Mandrel 12 rapper 13 center of rotation 14 Information 15 arms 16 rapper roll 17 Transport table 18 guide roll 19 drive roll 20 Lifting device 21 Foundation 22 hollow cylinder 23,37 Support material 24,30 lifting cylinder 25 Mandrel heating device 26 Foundation 27 Lower heating element 28 Upper heating element 29 open / close cylinder 32 rotary drive 33 External support material 34 Eccentric bearing 35 wedge 36 Combustion device 38 Exhaust opening 39 bearings 40 Coil end face heating device 41 Combustion chamber 42 Radiant 43 Pulley 44 Elevator 45 adjusting cylinder 50 pinch rolls R reverse rolling machine RF reverse finishing mill

─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-59-137107 (JP, A) JP-A-57-58903 (JP, A) JP-A-4-197521 (JP, A) JP-A-3- 193217 (JP, A) JP-A-2-37903 (JP, A) JP-A-1-317618 (JP, A) JP-A-1-254302 (JP, A) (58) Fields investigated (Int.Cl. ⁷ , DB name) B21B 45/00-45/02 B21B 1/00-11/00 B21C 47/00

Claims (6)

(57) [Claims] 1. A finish rolling mill train for finishing rolling a material to be rolled supplied from a heating furnace, and a coil provided on an inlet side of the finish rolling mill train, which retains heat substantially evenly and performs rewinding. A heat-retaining coiler is provided, and the front stage of the finish rolling mill row is constituted by a reverse rolling machine that performs normal rotation and reverse rolling, and the heat-retaining coiler has a coil wound around the outer peripheral portion.
A hollow mandrel through which combustion gas flows, and the mandrel
Are installed around the coil to guide and retract the winding of the coil.
The avoidable wrapper and the manipulator before starting the winding of the coil.
Winding the coil by enclosing the mantle and heating the mandrel
Mandrel heating that retracts from the mandrel during rewinding
Device and end face of coil wound on said mandrel
It is provided to face the mandrel and is detachable from the mandrel.
And a coil end face heating device for radiatively heating the coil end face.
The mandrel comprises a combustion gas within the mandrel.
Part has an exhaust opening for exhaust along the coil end surface
That, rolling equipment, characterized in that. 2. 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. The heat retaining coiler is equipped with a coil around the outer periphery to
A hollow mandrel through which combustion gas flows, and the mandrel
Are installed around the coil to guide and retract the winding of the coil.
The avoidable wrapper and the manipulator before starting the winding of the coil.
Winding the coil by enclosing the mantle and heating the mandrel
Mandrel heating that retracts from the mandrel during rewinding
Device and end face of coil wound on said mandrel
It is provided to face the mandrel and is detachable from the mandrel.
And a coil end face heating device for radiatively heating the coil end face.
The mandrel comprises a combustion gas within the mandrel.
Part has an exhaust opening for exhaust along the coil end surface
That, rolling equipment, characterized in that. 3. The material to be rolled supplied from the 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 to heat the temperature of each part of the coil substantially evenly and winds and unwinds the heat-retaining coiler. Wrapped around
A hollow mandrel through which combustion gas flows, and the mandrel
Are installed around the coil to guide and retract the winding of the coil.
The avoidable wrapper and the manipulator before starting the winding of the coil.
Winding the coil by enclosing the mantle and heating the mandrel
Mandrel heating that retracts from the mandrel during rewinding
Device and end face of coil wound on said mandrel
It is provided to face the mandrel and is detachable from the mandrel.
And a coil end face heating device for radiatively heating the coil end face.
The mandrel comprises a combustion gas within the mandrel.
Part has an exhaust opening for exhaust along the coil end surface
That, rolling equipment, characterized in that. 4. 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 heat retaining coiler for performing rewinding and rewinding, wherein the heat retaining coiler has a coil wound around an outer peripheral portion thereof.
A hollow mandrel through which combustion gas flows, and the mandrel
Are installed around the coil to guide and retract the winding of the coil.
The avoidable wrapper and the manipulator before starting the winding of the coil.
Winding the coil by enclosing the mantle and heating the mandrel
Mandrel heating that retracts from the mandrel during rewinding
Device and end face of coil wound on said mandrel
It is provided to face the mandrel and is detachable from the mandrel.
And a coil end face heating device for radiatively heating the coil end face.
The mandrel comprises a combustion gas within the mandrel.
Part has an exhaust opening for exhaust along the coil end surface
That, rolling equipment, characterized in that. 5. 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. , The heat insulation coiler has a coil wound around the outer circumference
A hollow mandrel through which combustion gas flows, and the mandrel
Are installed around the coil to guide and retract the winding of the coil.
The avoidable wrapper and the manipulator before starting the winding of the coil.
Winding the coil by enclosing the mantle and heating the mandrel
Mandrel heating that retracts from the mandrel during rewinding
Device and end face of coil wound on said mandrel
It is provided to face the mandrel and is detachable from the mandrel.
And a coil end face heating device for radiatively heating the coil end face.
The mandrel comprises a combustion gas within the mandrel.
Part has an exhaust opening for exhaust along the coil end surface
That, rolling equipment, characterized in that. 6. A material to be rolled supplied from a 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. And a heat retaining coiler for performing the heat retaining coil.
The coil has a coil wound around the outer periphery to allow combustion gas to flow inside.
A hollow mandrel to be passed through and the installation around the mandrel.
And the guide that guides the coil winding and the retractable rack.
Par and surround the mandrel before starting coil winding
And heating the mandrel,
A mandrel heating device retracting from the mandrel;
Facing the end face of the coil wound around the mandrel,
The coil end is detachably attached to the mandrel.
And a coil end surface heating device for radiatively heating the surface.
The mandrel coils the combustion gas from the inside of the mandrel.
A rolling facility having an exhaust opening for discharging along an end face .