JPH0631315A - Rolling equipment - Google Patents

Abstract

PURPOSE:To provide rolling equipment with which thrust forces are not generated between back-up rolls and work rolls even when only upper and lower work rolls are crossed. CONSTITUTION:A lubricating liquid 15 or a cleaning liquid 17 is fed between the work rolls 11, 12 and back-up rolls 13, 14 with lubricating/cleaning devices 18 Which are provided with a rotary switching mechanism 19 and the roll surface is ground during rolling by providing roll grinding devices 30. Frictional coefficient is reduced by reducing the frictional coefficient between the rolls with the lubricating liquid, decreasing thrust forces applied to the back-up rolls and preventing the roughness of the roll surface also by the laspe of time. The generation of scratch due to slip is prevented by feeding the lubricating liquid to the back-up rolls 13, 14 during rolling and, when the tail of sheet is passed through, increasing the frictional force between the rolls by cleaning the lubricating liquid by switching to cleaning liquid in a very short time with a rotary switching mechanism 19. Further, with a load cell 31 and controller 32, such control that the lubricating liquid is fed is executed only when detected rolling load is larger and the thrust forces are reduced in accordance with rolling load.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a work roll cross type rolling facility for crossing only upper and lower work rolls without changing the positions of intermediate rolls and backing rolls. The thrust force generated between the intermediate roll and the four-stage backup roll can be reduced.

[0002]

2. Description of the Related Art One of the methods for controlling the cross-sectional shape of a rolled product with high accuracy is to slightly cross the upper and lower work rolls to change the clearance distribution between the rolls, which has been put into practical use as a so-called cross mill.

In this cross mill, upper and lower work rolls are crossed in a horizontal plane by inclining their rotation axes in directions opposite to each other with respect to the direction perpendicular to the line.

When such a cross mill is constructed as, for example, a four-high rolling mill, if only the upper and lower work rolls are crossed and the upper and lower backing rolls supporting the work rolls are left in the state without being crossed, Thrust force is generated between the work roll and the rolled material, and a large thrust force is generated between the work roll and the backing roll.

For this reason, it is necessary to provide a strong thrust bearing at the end of the work roll or the supporting roll against the thrust force generated between the rolls so that the housing supports the thrust bearing.

[0006]

However, the thrust force between the rolls has a problem that the value itself is considerably large and also increases as the rolling load increases. On the other hand, due to the space limitation of the housing and the like, The thrust force cannot be supported by providing an excessively large thrust bearing.

Therefore, in the conventional cross mill, as shown in the schematic configuration of FIG. 4, upper and lower work rolls 1 and 2 and upper and lower support rolls (supporting rolls of a four-high rolling mill or 6
In order to eliminate the generation of thrust force between the intermediate rolls 3 and 4 of the multi-stage rolling mill, these support rolls 3 and 4 are of the pair cross type in which they are crossed at the same angle so as to be parallel to the rotation axes of the work rolls 1 and 2. The present situation is to prevent the thrust force from being generated in the upper and lower support rolls 3 and 4.

For this reason, in addition to the work rolls 1 and 2, a cross mechanism for supporting rolls 3 and 4 (retaining rolls and intermediate rolls) for supporting the work rolls 1 and 2 is required, and the structure of the cross mill becomes complicated. There is.

The present invention has been made in view of the above problems of the prior art. Even if only the upper and lower work rolls are crossed, a large thrust force is not generated between the supporting rolls such as the backing roll and the intermediate roll. It is intended to provide rolling equipment capable of doing so.

[0010]

In order to solve the problems of the above-mentioned prior art, a rolling mill of the present invention is a rolling mill in which only upper and lower work rolls cross each other in a horizontal plane. A lubricating liquid supply device for supplying a lubricating liquid between the intermediate roll or the auxiliary roll supporting the roller to reduce the frictional force to reduce the thrust force between the rolls is provided, and is in contact with the surface of the intermediate roll or the auxiliary roll. It is characterized in that it is provided with a roll polishing device for polishing by means of polishing.

Further, the rolling equipment of the present invention is a rolling equipment in which only upper and lower work rolls cross each other in a horizontal plane, and a thrust force is applied between the work roll and an intermediate roll or a backing roll supporting the work roll. It is characterized in that a lubrication / cleaning device having a rotation switching mechanism for switching and supplying the reducing lubricating liquid and the cleaning liquid for cleaning the lubricating liquid is provided.

Further, the rolling equipment of the present invention is a rolling equipment in which only upper and lower work rolls cross each other in a horizontal plane, and a lubricating liquid is provided between the work roll and an intermediate roll or a backup roll supporting the work roll. Is provided to reduce the frictional force to reduce the thrust force between the rolls, while a load detector to detect the rolling load is provided, and based on the detection result, the supply amount of the lubricating liquid is increased / decreased and stopped. It is characterized in that a control device for controlling is provided.

[0013]

According to this rolling equipment, the lubricating liquid is supplied between the work roll and the supporting roll or the intermediate roll supporting the work roll by the lubricating liquid supply device, and the roll polishing device is provided to roll surface during rolling. By polishing the rolls with a lubricating liquid to reduce the friction coefficient between the rolls, the thrust force applied to the supporting rolls such as the backing rolls and intermediate rolls is reduced, and the friction caused by the roughening of the roll surface due to long-term operation The rolling equipment is designed to prevent the coefficient from increasing and to reduce the thrust force, to allow only work rolls to roll, and to simplify the cross mechanism.

Further, according to this rolling facility, the lubricating liquid or the cleaning liquid is supplied to the backup roll and the intermediate roll supporting the work roll of the work roll cross mill by the lubrication / cleaning device equipped with the rotation switching mechanism. , During rolling,
Lubricating liquid is supplied to supporting rolls such as backing rolls and intermediate rolls to reduce the thrust force by reducing the coefficient of friction. As a rolling facility that can be cleaned to increase the frictional force between the work roll and the support roll to prevent the occurrence of scratches due to slips, enable roll crossing with only higher performance work rolls, and simplify the crossing mechanism. There is.

Further, according to this rolling facility, the lubricating liquid is supplied between the work roll and the backing roll or the intermediate roll supporting the work roll by the lubricating liquid supply device, and a load detector for detecting the rolling load. The load detector detects the lubricating liquid supplied to reduce the thrust force applied to the supporting rolls such as the backup roll and the intermediate roll by reducing the friction coefficient between the rolls. Depending on the rolling load, when the load is small, the supply amount is reduced or stopped, and when the load is large, control such as supplying the lubricating liquid is performed to reduce the thrust force that increases according to the rolling load. Rolling equipment that enables only work rolls and a simple cross mechanism.

[0016]

Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 is a schematic side view of an embodiment in which the rolling equipment of the present invention is applied to a four-high rolling mill. The rolling equipment 10 is of a work roll cross type in which only the upper and lower work rolls 11 and 12 are crossed, and although not shown, the roll chock supported by the housing is movable by a cross mechanism, and the roll chock is line direction in a horizontal plane. Upper and lower work rolls 11 and 12 with respect to the direction perpendicular to L
The upper and lower holding rolls 13 and 14 supporting the upper and lower work rolls 11 and 12 which can cross each other's rotating shafts have their rotating axes at right angles to the line direction L as in a normal rolling mill. The roll chock is fixed to the housing.

A lubricating liquid supply device 16 for supplying a lubricating liquid 15 between the upper work roll 11 and the upper backing roll 13 of the rolling facility 10 and between the lower work roll 12 and the lower backing roll 14 is provided. It is provided.

In this embodiment, the lubricating liquid supply device 16 is
It is installed as a lubrication / cleaning device 18 for supplying the lubricating liquid 15 and the cleaning liquid 17 for cleaning the lubricating liquid 15, and the upper and lower holding rolls 1
A rotary header 19 is rotatably supported by the housing along the roll axis direction of 3, 14, and a large number of lubricating liquid nozzles 20 are arranged on one side of the rotary header 19 facing each other, and a large number of cleaning liquid nozzles 21 are arranged on the other side. It is arranged and configured. A rotary joint 22 is provided at one end of the rotary header 19, the lubricating liquid 15 in the lubricating liquid tank 24 is supplied via the lubricating liquid pump 23, and the cleaning liquid tank 2 via the cleaning liquid pump 25.
A cleaning liquid 17 is supplied from 6. Further, a motor 27 for switching between lubrication and cleaning is provided outside the rotary joint 22, is connected to the rotary header 19, and rotates the entire rotary header 19 so as to face the rolls with the lubricating liquid nozzle 20 or the cleaning liquid nozzle 21. The direction of can be switched in a very short time.

Further, a seal jacket 28 is provided so as to cover the rotary header 19, and the leading edge thereof is the surface of the upper work roll 11 and the upper backing roll 13, or the surface of the lower work roll 12 and the lower backing roll 14. Since the lubricating liquid 15 or the cleaning liquid 17 sprayed from the lubricating liquid nozzle 20 or the cleaning liquid nozzle 21 is sealed, the rolling material W is prevented from being excessively covered with the lubricating liquid 15 or the like. In addition, upper and lower work roll 1
A spatula-shaped supply liquid scraping device 29 made of rubber or the like is provided on the inlet side of the rubbers 1 and 12 to scrape off the lubricating liquid 15 and the cleaning liquid 17. Oil is used as the lubricating liquid 15 supplied between the rolls, and water is used as the cleaning liquid 17.

In the rolling equipment 10 thus constructed, oil is supplied as the lubricating liquid 15 between the upper work roll 11 and the upper backing roll 13 and between the lower work roll 12 and the lower backing roll 14 to supply the lubricating liquid 15. By injecting from the nozzle 20, the friction coefficient between the upper and lower work rolls 11 and 12 and the upper and lower holding rolls 13 and 14 becomes small, and the thrust force generated between the rolls can be reduced.

As a result, the upper and lower work rolls 11 and 12 are
Even if only the cross rolls are crossed and the upper and lower holding rolls 13 and 14 are left as they are without being crossed, the thrust force between the rolls becomes small, and the thrust countermeasure can be easily performed. In addition to being able to do, the cross mechanism also has work rolls 11, 12
Just be good and easy.

When rolling is performed while supplying the lubricating liquid 15 in this manner, the roll surface becomes rough with the passage of time, the friction coefficient increases, and the effect of supplying the lubricating liquid 15 decreases.

Therefore, the rolling equipment 10 is equipped with a roll polishing device 30 for polishing the roll surface during rolling, and in the embodiment shown in FIG. 1, it is arranged so as to contact the upper and lower holding rolls 13 and 14, The surface of the roll can be polished by traveling in the axial direction of the roll by a drive mechanism (not shown). In addition, the upper and lower support rolls 13 and 14
Not only that, the roll polishing apparatus 30 may be additionally installed so as to perform the roll polishing of the upper and lower work rolls 11 and 12.

In the rolling equipment 10 provided with such a roll polishing device 30, the roll surface roughness of the upper and lower holding rolls 13 and 14 can always be maintained at a certain value or less, and the operation time in combination with the supply of the lubricating liquid 15 can be maintained. It is possible to reduce the thrust coefficient by reducing the friction coefficient between the rolls irrespective of the above, and it is possible to realize a work roll cross mill with better performance.

Next, in such a rolling facility 10, the upper and lower work rolls 1 are supplied by supplying the lubricating liquid 15 and roll polishing.
The coefficient of friction between the rolls 1 and 12 and the upper and lower backing rolls 13 and 14 is reduced, and the thrust force generated between the rolls can be reduced. However, when the rolling force is small, the friction coefficient between the rolls is small. There is a problem that slips occur between the work rolls 11 (12) and the backup rolls 13 (14) and the rolls are damaged, and when the rolling equipment 10 is emergency stopped or suddenly decelerated, similarly, Roll slip occurs,
The backing roll 13 (14) may continue to rotate due to the inertial force, and the surface of the work roll 11 (12) may be damaged.

Therefore, in this rolling facility 10, as shown in FIGS. 1 and 2, the lubrication / cleaning device 18 is used as the lubrication liquid supply device 16, and not only the lubrication liquid 15 is supplied between the rolls but also the rolls. If it is necessary to increase the friction coefficient between the two, it is also used to wash away the lubricating liquid 15 by supplying the cleaning liquid 17 to increase the friction coefficient.

Therefore, the rolling equipment 10 is provided with a load detector 31 for detecting the rolling load, and the detection result is the control device 3.
2 is input, and the control device 32 controls the motor 27 for rotationally driving the rotary header 19.

In the rolling equipment 10 as described above, when the lubricant 15 is supplied from the lubrication / cleaning device 18 between the rolls for rolling, for example, when the rolling material W slips out, the load detector 31 is used. When a low rolling load is detected,
A switching signal is output from the control device 32 to the motor 27, the entire rotary header 19 is rotated to direct the cleaning liquid nozzle 21 between the rolls, and the supply of the lubricating liquid 15 is stopped.
The cleaning liquid 17 is supplied.

By doing so, the lubricating liquid 15 which has been supplied between the rolls is washed away by the cleaning liquid 17 to be washed, and the friction coefficient between the rolls increases to the state where there is no lubricating liquid. Is prevented and scratches on the roll are prevented.

Further, since the switching between the lubricating liquid 15 and the cleaning liquid 17 is carried out by using the rotary header 19, the switching speed is faster than that in the case of switching by a valve, and it is possible to respond with good responsiveness. it can.

On the other hand, when the rolled material W is caught, when the load detector 31 detects an increase in the rolling load,
A switching signal is sent from the control device 32 to the motor 27 of the rotary header 19 so that the cleaning liquid nozzle 21 faces rearward and the lubricating liquid nozzle 20 faces forward.
The supply of 5 also increases.

As a result, a large amount of the lubricating liquid 15 is supplied between the rolls, the friction coefficient between the rolls is reduced, and the generated thrust force can be reduced.

Further, the constant rolling load during rolling is detected, and when the load increases, the supply amount of the lubricating liquid 15 is increased,
When the rolling load decreases, the control device 32 reduces the amount of the lubricating liquid 15 or, in some cases, stops the supply.
Control with.

As the rotation switching mechanism of the lubrication / cleaning device 18, in addition to rotating the entire rotary header 19 by a motor 27, as shown in FIG. 3, the outer side constituted by a double cylinder is used as a fixed header 41. A large number of spray nozzles 42 are installed on the roll side, and the inside of the double cylinder is rotated.
Then, the fixed header 41 is rotated about its central axis, and the pipe lines 44 and 45 for the lubricating liquid 15 and the cleaning liquid 17 are formed in the rotating header 43. A drive motor 46 is connected to the rotary header 43, and the lubricating liquid 15 and the cleaning liquid 17 are supplied to the pipelines 44 and 45 via a rotary joint 47.

Even with such a rotation switching mechanism, the lubricating liquid 15 and the cleaning liquid 17 can be switched in a very short time.

When the amount of the lubricating liquid 15 is increased or decreased by the rolling load or stopped, it is possible to install only the lubricating liquid supply device 16, and it is not necessary to combine the cleaning with the cleaning liquid 17, but the cleaning is performed. Higher precision control is possible by combining with.

In this case, the relationship between the supply amount of the lubricating liquid 15 and the rolling load is not a simple proportional relation, but an appropriate amount is supplied by using a function determined in advance by experiments or the like.

Further, excessive accumulation of the lubricating liquid 15 between the rolls has a bad effect on the rolling operation, and the rotary header 1
It is preferable to connect a lubricating liquid discharge pump to the outlet side of 9 to collect the retained lubricating liquid 15 in the lubricating liquid tank 26.

Furthermore, in the above-mentioned embodiment, the case where the rolling equipment is applied to the four-high rolling mill has been described, but the present invention is not limited to this, and it can be applied to a multi-high rolling mill such as a six-high rolling mill.

Further, each constituent element may be modified within a range not changing the gist of the present invention.

[0041]

As described above in detail with reference to the embodiments, according to the rolling equipment of the present invention, the lubricating liquid is supplied between the work roll and the backing roll or the intermediate roll supporting the work roll. In addition to the above, the roll polishing device is installed to polish the roll surface during rolling.By reducing the friction coefficient between the rolls with a lubricating liquid, the thrust applied to the supporting rolls such as the backup roll and the intermediate roll can be reduced. The force can be reduced and the friction coefficient can be prevented from increasing due to the surface roughness of the roll due to long-term operation, and the thrust force can be reduced more reliably. The mechanism only needs to be for work rolls,
Easy to do.

Further, according to this rolling facility, the lubricating liquid or the cleaning liquid is supplied to the auxiliary rolls and the intermediate rolls supporting the work rolls of the work roll cross mill by the lubrication / cleaning device equipped with the rotation switching mechanism. , During rolling,
It is possible to reduce the thrust force by reducing the friction coefficient by supplying the lubricating liquid to the supporting rolls such as the backing rolls and intermediate rolls.If the rolling material slips out, switch to supplying the cleaning liquid in a very short time. It is possible to wash the lubricating liquid, increase the frictional force between the work rolls and the support rolls, prevent the occurrence of scratches due to slip, and enable a roll cloth of only higher performance work rolls.

Further, according to this rolling facility, the lubricating liquid is supplied between the work roll and the supporting roll or the intermediate roll supporting the work roll by the lubricating liquid supply device, and a load detector for detecting the rolling load. Since a control device is provided, the load detector detects the lubricating liquid that is supplied to reduce the thrust force applied to the supporting rolls such as the auxiliary roll and the intermediate roll by reducing the friction coefficient between the rolls. Depending on the rolling load, the supply amount is reduced or stopped when the load is small, and the lubricating liquid is supplied only when the load is large, so that the thrust force that increases according to the rolling load can be reduced more reliably. Therefore, it is possible to roll rolls only with work rolls.

With any of these, it is possible to easily take measures against the thrust force generated between the rolls, and it is possible to realize a rolling facility for crossing only the work rolls.

[Brief description of drawings]

FIG. 1 is a schematic side view according to an embodiment in which the rolling equipment of the present invention is applied to a four-high rolling mill.

FIG. 2 is a schematic configuration diagram according to another embodiment in which the rolling equipment of the present invention is applied to a four-high rolling mill.

FIG. 3 is a partial plan view according to still another embodiment in which the rolling equipment of the present invention is applied to a four-high rolling mill.

FIG. 4 is a schematic configuration diagram of a conventional pair cross type cross mill.

[Explanation of symbols]

 10 Cross Mill 11 Upper Work Roll 12 Lower Work Roll 13 Upper Holding Roll 14 Lower Holding Roll 15 Lubricating Liquid 16 Lubricating Liquid Supply Device 17 Cleaning Liquid 18 Lubricating / Cleaning Device 19 Rotary Header 20 Lubricating Liquid Nozzle 21 Cleaning Liquid Nozzle 22 Rotary Joint 23 Lubricating Liquid Pump 24 Lubricating liquid tank 25 Cleaning liquid pump 26 Cleaning liquid tank 27 Motor (for nozzle switching) 30 Roll polishing device 31 Load detector 32 Control device W Rolled material

Claims (3)

[Claims] 1. In a rolling facility in which only upper and lower work rolls are crossed with each other in a horizontal plane, a lubricating liquid is supplied between the work roll and an intermediate roll or a backing roll supporting the work roll to reduce frictional force. Rolling equipment, characterized in that it is provided with a lubricating liquid supply device for reducing the thrust force between the rolls, and a roll polishing device for abutting and polishing the surface of the intermediate roll or the backup roll. 2. A rolling facility in which only upper and lower work rolls are crossed with each other in a horizontal plane, and a lubricating liquid for reducing thrust force and lubrication are provided between the work roll and an intermediate roll or an auxiliary roll supporting the work roll. A rolling facility equipped with a lubrication / cleaning device equipped with a rotation switching mechanism for switching and supplying a cleaning liquid for cleaning the liquid. 3. In a rolling facility in which only upper and lower work rolls are crossed with each other in a horizontal plane, a lubricating liquid is supplied between the work rolls and an intermediate roll or a backing roll supporting the work rolls to generate a frictional force. While providing a lubricating liquid supply device that reduces the thrust force between the rolls,
A rolling facility comprising a load detector for detecting a rolling load, and a control device for increasing or decreasing the supply amount of the lubricating liquid based on the detection result and stopping the control.