JPH07204704A - Rolling equipment - Google Patents

Abstract

PURPOSE:To provide a rolling equipment by which a hot skin pass process is executed in a hot rolling line and improvement of bitting property and reduction of rolling load are made compatible. CONSTITUTION:A warm rolling machine 13 is provided on the downstream side of a cooling table 12 on the outlet side of a line of hot rolling machines and a pinch roll 16 provided with an air reduction type large diameter roll 17 for preliminary pass is provided on the inlet side of the warm rolling machine 13. Thus, a material to be rolled is biten with the warm rolling machine 13 after engaging with the large diameter roll 17, improving biting property by enlarging the diameter of pinch roll 16 and rolling load is reduced by fixing the diameter of roll of warm rolling machine 13 to be small. Further, a floating carrying device 31 is provided between the pinch roll 16 and warm rolling machine 13, the material to be rolled 14 is held in a floating state and more surely biten with the warm rolling machine 13.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rolling facility equipped with a warm rolling mill (skin pass mill) in a hot rolling line, in which a material to be rolled sent from a row of hot finishing rolling mills is warmed in-line. In addition to being able to be rolled, it is easy to bite.

[0002]

2. Description of the Related Art A metal strip rolled in a hot rolling line is cooled by a cooling table 2 arranged on the outlet side of a hot finishing rolling mill train 1 as shown in FIG. 4 (a), for example. Then, after passing through the shear 3, it is alternately wound around a winder 4 such as a down coiler.

The metal strip 5 thus wound has a poor flatness due to a defective shape due to cooling, and it is necessary to correct the flatness. For example, as shown in FIG. 4B, a hot rolling line is used. It is sent to a separate hot skin pass mill 6 for correction.

When the hot skin pass mill 6 is separately provided in this manner, the winding and rewinding machines 7 may be required on the inlet side and the outlet side of the hot skin pass mill 6, respectively. It has been proposed to install a hot skin pass mill 6 downstream of the cooling table 2 on the delivery side.

[0005]

However, by installing a hot skin pass mill in the hot rolling line, it is possible to rationalize the equipment and to simplify the process, but at the same time, from the hot rolling mill train at high speed. It is difficult to bite the material to be rolled (metal strip 5) sent out into the hot skin pass mill, and a biting failure often occurs.

Therefore, if the roll diameter of the hot skin pass mill is increased to improve the biting property, there is a problem that the force required to obtain a predetermined rolling load increases.

The present invention has been made in view of the above problems of the prior art. The flatness and the like can be corrected by a warm rolling mill in a hot rolling line, and the biting property and rolling load can be improved. It is intended to provide a rolling facility that can achieve both reductions.

[0008]

In order to solve the problems of the above-mentioned prior art, the rolling equipment according to claim 1 of the present invention is a hot rolling machine downstream of a cooling table on the outlet side of a hot finish rolling mill train. While the machine is provided, a pinch roll provided with an air pressure type large diameter roll for pre-passing is provided on the inlet side of the warm rolling mill.

According to a second aspect of the present invention, in addition to the structure of the first aspect, the rolling material is placed between the pinch roll and the warm rolling mill so as to face the surface of the material to be rolled. The present invention is characterized in that a floating transfer device for holding the above in a floating state is provided.

[0010]

According to the rolling equipment of claim 1 of the present invention,
A warm rolling mill is installed on the downstream side of the cooling table on the exit side of the hot finish rolling mill row, while a large pneumatic diameter type with excellent shock absorption for pre-passing is provided on the inlet side of this warm rolling mill. A pinch roll equipped with a roll is provided so that the pinch roll having a large diameter can be bitten into the warm rolling mill and then the pinch roll can be bitten while improving the biting property. The roll diameter of the warm rolling mill is kept small to reduce the rolling load.

According to the rolling equipment of claim 2 of the present invention, in addition to the structure of claim 1, a floating transport device is provided between the pinch roll and the warm rolling mill.
The material to be rolled is held in a floating state so that it can be more surely caught in the warm rolling mill.

According to these inventions, the hot skin pass process can be carried out in the hot finish rolling line.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the drawings. 1 and 2 are a schematic configuration diagram and a schematic layout diagram of an entire main part according to an embodiment of the rolling equipment of the present invention.

In this rolling facility 10, a warm rolling mill 13 is arranged downstream of a cooling table 12 arranged on the outlet side of the hot finishing rolling mill train 11, and a hot skin pass mill is used in the hot finishing rolling line. The rolled material 14 can be straightened. This warm rolling mill 13 is composed of, for example, a four-high rolling mill and a pair of upper and lower skin pass rolls constituted by small-diameter rolls, like a hot skin pass mill installed separately from a conventional hot finish rolling line. It is equipped with 15.

A pinch roll 16 is disposed close to the entry side of the warm rolling mill 13, and the upper pinch roll 17 is compared with the lower pinch roll 18 in order to facilitate passing of rolled material. It has a large diameter roll, and is a pneumatic roll type to facilitate biting with a small rolling force.
Further, above the entrance side rolling line of the upper pinch roll 17 which is a large diameter roll, a strip guide 19 is attached so as to incline downward toward the downstream side in the line direction, and the tip of the material 14 to be rolled is pinched. It is guided between the rolls 16.

A shape detector 20 for detecting the shape after warm rolling is provided downstream of the warm rolling mill 13,
For example, light from a rod-shaped light source is applied to the surface of the rolled material, the reflected light is monitored by the TV camera 21, and a change in shape is obtained by image processing. It is designed to be controlled.

Further, a shear 23 is provided further downstream and two winders 24 such as a down coiler are provided so that a predetermined amount can be alternately wound.

In the rolling equipment 10 constructed as above, the material 14 to be hot-finished and rolled by the row 11 of hot-finishing rolling mills.
Is sent to the cooling table 12 and the temperature from about 900 ° C to 50
After being cooled to about 0 to 600 ° C., it is sent to the pinch roll 16.

Since the pinch roll 16 is provided with a threading guide 19 on the entrance side, the leading end of the material 14 to be rolled is first guided by the threading guide 19 and between the upper and lower pinch rolls 17, 18. At the same time, the upper pinch rolls 17 having a large diameter guide the upper and lower pinch rolls 17, 18
The tip is bitten smoothly by being guided between them.

After the pinch roll 16 is pre-engaged in this way, the tip of the material 14 to be rolled is bitten between the skin pass rolls 15 of the warm rolling mill 13.

Skin pass roll 1 of this warm rolling mill 13
Since the pinch roll 16 is provided close to the upstream side, the tip of the material 14 to be rolled advances linearly so that the skin pass roll 15 having a small diameter can be caught.
I get caught in between.

The rolled material 14 bitten in this way is rectified by the warm rolling mill 13 for shape defects due to cooling, passes through the shear 23, and is wound up by a winder 24 such as a down coiler.
When a predetermined amount of rolled material is wound on one of the winders 24, it is cut by the shear 23 and wound by the other winder 24. By performing the winding, the winding is continuously performed.

According to such a rolling facility 10, even if the skin pass roll 15 of the warm rolling mill 13 is constituted by a roll having a small diameter, a pinch roll having a large diameter upper pinch roll 17 is provided close to the entrance side thereof. Since 16 are arranged, the rolled material 14 is first bited into the pinch roll 16,
The large-diameter upper pinch roll 17 facilitates this, and since the threading guide 19 is also installed, it can be more easily engaged.

By the preliminary biting into the pinch roll 16, even the warm rolling mill 13 provided with the skin pass roll 15 having a small diameter can easily bite.

Therefore, the rolling load in the warm rolling mill 13 can be obtained with a small rolling force, and the problem of biting and the problem of rolling force can be solved at the same time.

Further, since the warm rolling mill 13 is installed in the hot finish rolling line, it is not necessary to install a hot skin pass line separately, and the labor of the equipment can be saved, and at the same time, the cooling table 12 is provided. Cooled in 500-6
Since warm rolling is performed by applying a rolling force with the warm rolling mill 13 in a state of about 00 ° C., it is possible to improve the formability of the plate in the pressing step, for example, the drawability.

Next, an embodiment of rolling equipment according to claim 2 of the present invention will be described.

In this rolling facility 30, the pinch roll 16 is provided in order to further ensure the biting into the warm rolling mill 13.
A floating transfer device 31 is installed between the hot rolling mill 13 and the warm rolling mill 13. The floating conveyance device 10 has a rolling material guide plate 34 constituting a substantially horizontal rolling material guide surface 33 at a position slightly higher than the conveyance level 32 of the rolling material 14, and extends in the rolling line direction over the entire length. In the width direction of the rolled material 14, one row or a plurality of rows, for example, two rows as shown in FIG. 3B are provided.

An air header 35 is provided in the central portion of the rolled material guide plate 34 in the rolling line direction, and is connected to a compressed air supply device (not shown) to supply compressed air.

On both sides of the rolled material guide plate 34 in the width direction of the rolled material 14, slit-shaped nozzles 36 for forming a high-speed air flow from the inside of the air header 35 toward the outer side of the rolled material 14 in the width direction are provided. One pair is formed so that high-speed air streams can be formed in opposite directions.

Next, the floating transfer device 3 thus constructed
The operation of the rolling equipment 30 equipped with No. 1 will be described.

In this rolling equipment 30, the rolled material 14 bitten by the pinch rolls 16 and sent out is sent to the floating transfer device 31, as in the first embodiment.

In this floating transfer device 31, the air header 3
5, compressed air is supplied to the rolled material guide plate 34 from a pair of nozzles 36 between the lower surface of the rolled material guide surface 33 and the upper surface of the rolled material 14 in opposite directions toward both sides in the width direction of the rolled material 14. To form a high-speed air flow (see the arrow in FIG. 3A).

Then, the air between the rolled material guide surface 33 between the pair of nozzles 36 and the rolled material 14 is entrained in the high-speed air flow and discharged, and the pressure in this portion is compared with the atmospheric pressure due to the ejector effect. Will decrease.

Therefore, a suction force is generated based on the differential pressure between the atmospheric pressure applied to the lower surface of the rolled material 14 and the pressure on the upper surface of the rolled material 14 (see the pressure diagram in FIG. 3A), and the rolled material 14 so as to be attracted to the rolled material guide surface 33 side. Then, when the rolled material 14 approaches the rolled material guide surface 33 to some extent, the distance between the rolled material and the rolling material is narrowed, and the air resistance of the high-speed air flow ejected from the pair of nozzles 36 is increased. The pressure on the upper surface of the rolling material 14 increases and the suction force based on the differential pressure weakens, and the rolling material 14 is rolled at a position where the gravity force acting on the rolled material 14 and the suction force based on the differential pressure between the atmospheric pressure applied to the rolled material 14 are balanced. The material guide surface 33 is stably floated and held with a substantially constant interval.

In this case, the rolled material guide surface 33, which supports the rolled material 14 in a floating state, has a function of determining the posture of the rolled material 14 to be sucked and held, and a portion where air outside before and after the rolling line direction cannot enter. It is positively formed to improve the suction-holding efficiency by the high-speed air flow from the nozzle 36, and fulfills the function of ensuring the necessary suction-holding area.

The rolled material 1 thus held in a floating state
No. 4 has a substantially flat shape along the rolled material guide surface 33 of the rolled material guide plate 34 to increase the rigidity in the rolling line direction, and there is almost no frictional resistance in the rolling line direction. It becomes possible to transfer the applied transfer force and transfer at high speed.
3 can be more smoothly and surely engaged.

Needless to say, the rolling facility 30 also has the same effects as the rolling facility 10.

As shown in FIG. 2, if the floating conveying device 31 is also installed between the sheer 23 and the winder 24 on the downstream side, the following material cut by the shear 23 can be used. The tip can be reliably guided to the winder 24.

Further, these inventions are not limited to the above-mentioned embodiments, and each constituent element may be modified within a range not changing the gist of these inventions.

[0041]

As described above in detail with reference to the embodiment, according to the rolling equipment of claim 1 of the present invention,
A warm rolling mill is installed downstream of the cooling table on the exit side of the hot finish rolling mill train, and a pinch roll equipped with an air pressure type large diameter roll for pre-passing on the inlet side of this warm rolling mill. Since it is provided, it is possible to bite into a warm rolling mill after it is bitten into a large diameter pinch roll, and while improving the biting property by increasing the diameter of the pinch roll, It is possible to reduce the rolling load by keeping the roll diameter small.

According to the rolling equipment of the second aspect of the present invention, in addition to the structure of the first aspect, the floating conveying device is provided between the pinch roll and the warm rolling mill.
By holding the material to be rolled in a floating state, it is possible to more surely make the material to be caught in the warm rolling mill.

According to these inventions, the shape can be corrected by performing the hot skin pass process in the hot finish rolling line, and the labor of the rolling equipment can be saved.

Further, by performing the hot skin pass process by the warm rolling mill in the hot finish rolling line, the rolling force is applied to the rolled material and the formability of the plate can be improved.

Further, even when the rolled material is sent out at a high speed from the hot finish rolling line, it can be reliably passed.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram of a main part according to an embodiment of rolling equipment of the present invention.

FIG. 2 is an overall schematic layout diagram according to an embodiment of rolling equipment of the present invention.

FIG. 3 is a cross-sectional view and a front view of a floating transfer device used in the rolling equipment of the present invention.

FIG. 4 is a schematic configuration diagram of a conventional hot rolling facility and hot skin pass mill.

[Explanation of symbols]

 10 Rolling Equipment 11 Hot Finishing Rolling Machine Row 12 Cooling Table 13 Warm Rolling Machine 14 Rolled Material, Rolled Material 15 Skin Pass Roll 16 Pinch Roll 17 Upper Pinch Roll 18 Lower Pinch Roll 19 Threading Guide 20 Shape Detector 21 Television Camera 22 Control device 23 Shear 24 Winding machine 30 Rolling equipment 31 Floating transfer device 32 Transfer level 33 Rolled material guide surface 34 Rolled material guide plate 35 Air header 36 Nozzle

Claims (2)

[Claims] 1. A warm rolling mill is provided downstream of a cooling table on the exit side of a hot finish rolling mill train, and a pinch provided with a large-diameter roll for pre-passing on the entry side of this warm rolling mill. Rolling equipment characterized by having rolls. 2. A floating conveyance device is provided between the pinch roll and the warm rolling mill so as to face the surface of the material to be rolled and hold the material to be rolled in a floating state. Rolling equipment described.