JP3300248B2 - Roll roll grinding method and system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and system for rolling a roll, and more particularly, to a method for grinding a roll surface near a rolling mill instead of a roll shop in a cold rolling mill for a plate. And systems.

[0002]

2. Description of the Related Art The current state of roll grinding in cold rolling equipment In the case of cold rolling equipment, since the rolled steel sheet is the final product, very strict quality requirements are made regarding the surface properties of the steel sheet. I have. For this reason, when a certain amount of rolled material is rolled, the surface roughness of the rolling roll deteriorates, and the surface quality of the steel sheet rolled by the rolling roll having a bad surface condition deteriorates, so that the surface roughness of the rolling roll deteriorates. It is common to change to a new rolling roll before performing. For this reason, in cold rolling, it is necessary to frequently exchange rolling rolls in order to protect the surface quality of the rolled material.

[0003] The used rolls that have been exchanged are transported to a roll shop using a crane or the like, and are naturally cooled for about several hours in a roll cooling place to cool the heat heated by the rolling. Remove the box and cool to room temperature. Then, the roll is set on a dedicated grinder in a state of a single roll, and the outer periphery of the roll is ground so as to have an optimum roll profile and surface texture (surface roughness) for the target rolling. The ground rolling roll is returned to the roll changing device and re-integrated into the rolling mill.

Here, a grinding machine in a roll shop usually performs grinding by position control using a cylindrical grinding wheel in order to grind the outer periphery of a rolling roll into a desired shape (roll profile). In this case, in the case of a roll having an unstable roll profile due to heat immediately after rolling, the target grinding position always changes, and it becomes difficult to grind to the target shape. For this reason, the rolling roll is cooled to room temperature and then ground as described above.

A roll grinder using a cylindrical grinding wheel is capable of producing a "chatter" even if a roll to be ground is slightly vibrated during grinding, or a base installed on a grinding device is affected by vibration. And so on. For this reason, in order not to be affected by the vibration generated during the rolling operation, the place where the grinding machine is installed is set to a place away from the rolling mill. Further, when the bearing box is integrated with the rolling roll, since the play between the rolling roll and the bearing box causes vibration when the roll rotates, the bearing box is extracted from the rolling roll before grinding as described above, and the rolling roll alone is formed. It is in the state of grinding.

Online Roll Grinding There are many known examples of online roll grinding technology for grinding a roll in a rolling mill. However, online roll grinding has been put to practical use in hot rolling mills, but in cold rolling mills, very strict quality requirements have been made regarding the surface properties of steel sheets, so they are satisfied with cold rolling. It is difficult to grind the rolling roll surface properties in a rolling mill, and there is no practical example.

[0007] Japanese Utility Model Application Laid-Open No. 61-158304 discloses that a rolling roll, which has been abraded in a rolling mill and has a reduced surface roughness, is pulled out onto a bogie for exchanging rolls. Describes a technique for grinding a rolling roll with a roll grinding device. This grinding operation is said to perform grinding for simply removing scratches or attaching a new roll crown required for the next rolling. FIGS. 1 and 3 of Japanese Utility Model Laid-Open Publication No. 61-158304 show a roll grinding apparatus using a cylindrical grinding wheel.

[0008]

The above-mentioned "Current State of Roll Grinding in Cold Rolling Equipment" is a general treatment method when the surface properties of a roll in a cold rolling equipment have been deteriorated. . In such a general treatment method, a roll roll extracted from a rolling mill is conveyed to a roll shop provided at a location remote from the rolling mill, cooled to room temperature in the roll shop, and then ground. In this case, since the cooling of the rolling roll is natural cooling, it takes time to cool. Also, in order to increase the surface quality of the rolled material, the frequency of changing the rolling rolls is increased. Particularly, in the case of a facility having a plurality of rolling mills called a tandem rolling mill, the number of rolls is large, so the frequency of changing rolls is high. Become.

For this reason, in the conventional general treatment method,
It is necessary to keep a number of rolling rolls extracted from the rolling mill before grinding in a roll shop for cooling, many spare rolls are required, and a large space for cooling is required, so that the equipment becomes large.

Further, in the case of a roll grinding machine using a cylindrical grinding wheel, since it is sensitive to vibration, there are also restrictions such as the need to extract the bearing box from the rolling roll and then grind it with the roll grinding machine. is there. Due to such constraints, a considerable amount of time and operators are required until the roll is extracted and used again for rolling again just by correcting the roll surface of the roll.

[0011] In the "on-line roll grinding", when a rolling roll is ground in a rolling mill like a hot rolling facility in a cold rolling facility, a cold roll using a small-diameter rolling roll is used as compared with a hot rolling mill. In a rolling mill, it is difficult to install the on-line grinding device in the rolling mill unless the size thereof is extremely reduced. There is also a problem that grinding powder generated when grinding is mixed into the cooling liquid of the rolling roll. In order to completely separate the cooling fluid from the rolling roll and the grinding fluid, it is necessary to completely seal the periphery of the grindstone of the online roll grinding device so that the grinding fluid does not leak. But,
Since a roll having a different diameter may be incorporated into the roll every time the roll is used, a structure for completely sealing the grinding fluid becomes complicated.

If a grinding device is provided in the rolling mill, it is not possible to secure a sufficient space for installing a roll coolant header for cooling the rolling rolls, which causes a problem of the cooling capacity of the rolling rolls.

Further, since the rolling roll used in the cold rolling mill has high roll surface roughness accuracy, the rolling oil used for rolling may not be suitable for grinding, and the roll roll ground in the rolling mill may be a rolled material. Can have a negative effect on

As described above, the on-line grinding apparatus has a structural problem at the time of being installed in a rolling mill and is difficult to be put into practical use.

Japanese Utility Model Application Laid-Open No. 61-158304 discloses that a rolled roll worn out for grinding a roll is drawn out onto a roll exchanging cart, and then a cylindrical grinding wheel is used on the roll exchanging cart. As a grinding operation, not only removing scratches,
It is stated to add a new roll crown necessary for the next rolling.

However, grinding in which a roll crown is given to a rolling roll by a cylindrical rotary grindstone is the same as grinding in a roll shop, and requires grinding by fixed position control.
For this reason, it is necessary to cool the rolling roll to room temperature and grind it after the roll shape is stabilized.Similar to the case of the roll shop, if the roll replacement frequency increases, the number of rolls during cooling before grinding increases, and The extra rolls are required, and the size of the trolley for replacing the rolls must be increased.

Further, since the grinding is performed at a place very close to the rolling mill, vibrations from the rolling mill are transmitted to the cylindrical rotary grindstone of the roll grinding device, and the vibrations cause phenomena such as "chatter" during grinding. The grinding accuracy of the surface deteriorates.

Further, in order to insert a ground roll after extracting the roll currently in use, the two rolls must slide laterally on a roll exchanging trolley. For this reason, the used rolling rolls alternately stand by on the left and right sides of the roll exchanging cart,
The number of grinding devices is four even if one grinding roll is required.

A first object of the present invention is to provide a rolling roll grinding method and system which can simplify a grinding facility including a roll shop when performing a rolling roll grinding of a rolling mill of a cold rolling facility outside the rolling mill. To provide.

[0020] A second object of the present invention is to perform the work required for grinding the rolling rolls of the rolling mills of the cold rolling mill when the rolling rolls of the rolling mills of the cold rolling equipment are performed outside the rolling mills. An object of the present invention is to provide a rolling roll grinding method and system capable of reducing the number of persons.

A third object of the present invention is to provide a method for grinding a roll roll in a rolling mill of a cold rolling facility outside a rolling mill, in which the roll surface can be satisfactorily ground close to the rolling mill. Is to provide a system.

[0022]

(1) In order to achieve the first object, the present invention relates to a method for grinding a rolling roll, which can be moved in a direction perpendicular to a roll axis adjacent to a rolling mill.
When a roll changer with a side shift cart is placed
In both cases, roll grinding is performed at a different location from this roll changer.
The device is arranged, the side of the roll changer from the rolling mill
Pull out the rolling roll used for rolling onto the shift trolley ,
The extracted rolls are then transferred to the roll changer
From the top of the shift car to the location of the roll grinding device, to improve the roll surface properties of the rolling roll by completely grinding the roll surface of the rolling roll at a certain depth by the roll grinding device, return this rolling rolls on side shift carriage of the roll changer, it shall be used in rolling back.

As described above, in a place different from the roll changing device
A roll grinding device is installed, and a side shift
Roll exchange the rolling roll of spent which was withdrawn on the door truck
Roll grinding device from the side shift trolley of the changer
In the roll shop, the roll shop improves the roll surface texture by grinding the roll surface with a constant depth to improve the roll surface properties. Grinding performed only for the purpose becomes unnecessary, and only when it is necessary to correct the roll profile, it is sufficient to carry the grinding to the roll shop, and the grinding frequency at the roll shop is reduced. Further, since the grinding with this roll grinding device is good at grinding at a constant depth, the grinding can be performed immediately without cooling the rolling roll to room temperature, and the equipment of the roll grinding device can be simplified.
For this reason, when performing rolling roll grinding outside the rolling mill,
Grinding equipment including roll shop can be simplified.

[0024] (2), in order to achieve the first object, the present invention provides a method of grinding the rolling roll, a rolling
Side plate that can move in the direction perpendicular to the roll axis
While disposing a roll changer with a lift cart,
Install a roll grinding device in a different location from this roll changing device.
And location, sideshift stand of the roll changer from the rolling mill
Extracting rolling rolls used in the rolling on the car side shift of the roll changer of the withdrawn mill roll
Conveyed from the carriage to the location of the roll grinding device ,
Without cooling the rolling rolls by the roll grinding apparatus to ambient temperature near the roll surface of the rolling roll entirely ground at a certain depth, the rolling rolls of the roll changer support
It shall be returned to the id shift cart and used again for rolling.

Thus, in a place different from the roll changing device
A roll grinding device is installed, and a side shift
Roll exchange the rolling roll of spent which was withdrawn on the door truck
Roll grinding device from the side shift trolley of the changer
In the roll shop, the surface of the roll is improved by grinding the roll surface at a certain depth without cooling the roll to near room temperature. This eliminates the need for grinding only for the purpose of grinding, and reduces the frequency of grinding at the roll shop. Further, since the grinding by the roll grinding device is immediately performed without cooling the rolling roll to room temperature, the equipment of the roll grinding device can be simplified. For this reason, in performing the roll roll grinding outside the rolling mill, it is possible to simplify the grinding equipment including the roll shop.

[0026] (3) Further, in order to achieve the first object, the present invention is, in the rolling roll grinding method in the rolling mill and cold rolling facility having a roll shop, rolling
Side plate that can move in the direction perpendicular to the roll axis
While disposing a roll changer with a lift cart,
Install a roll grinding device in a different location from this roll changing device.
And location, sideshift stand of the roll changer from the rolling mill
Extracting rolling rolls used in the rolling on the car side shift of the roll changer of the withdrawn mill roll
Conveyed from the carriage to the location of the roll grinding device ,
The roll surface of the rolling roll is improved by completely grinding the roll surface of the rolling roll at a constant depth by the roll grinding device.
Side shift back onto the carriage, it is used for rolling again, withdrawal of the rolling roll, conveying, grinding, after the reuse step was repeated several times, withdrawn from the mill onto a side shift carriage of the roll changer the mill roll was transported to the roll shop and, grinding the rolling rolls in the roll shop on the roll profile and surface quality of the object, Saidoshifu the rolling rolls of the roll changer
It is returned to the trolley and used again for rolling.

As described above, in a place different from the roll changing device,
A roll grinding device is provided, and grinding by the roll grinding device is performed when the roll surface properties are improved, and grinding at the roll shop is performed when the desired roll profile and surface properties are obtained. The role of grinding in the equipment and the roll shop can be shared, and the frequency of grinding in the roll shop is reduced. Further, since the grinding with the roll grinding device may be performed at a constant depth, the rolling can be immediately performed without cooling the roll to room temperature, and the equipment of the roll grinding device can be simplified. For this reason, in performing the roll roll grinding outside the rolling mill, it is possible to simplify the grinding equipment including the roll shop.

(4) In the above (1) to (3), preferably, as the roll grinding device, an abrasive layer made of superabrasive particles is attached on a circumference of a side surface of a disk-shaped base metal. Constant-pressure grinding control, where the contact force between the rolling roll and the flat type rotary grinding wheel is constant, using a roll grinding device with
Alternatively, the surface of the rolling roll is ground at a constant depth over a grinding range by a constant load grinding control in which the rotational torque of the flat rotary grindstone is constant.

(5) Further, in order to achieve the second and third objects, the present invention provides the method of the above (1) to (3), wherein the roll grinding apparatus is preferably Using a roll grinding device having a flat-type rotary grindstone on which an abrasive layer made of superabrasives is attached on the circumference of the side surface of the disk-shaped base metal, the disk-shaped base metal has a flexible elasticity. The flat type rotary grindstone is arranged so that only one portion of the abrasive layer is in contact with the rolling roll, and the rolling roll is ground.

As described above, the grindstone of the roll grinding device provided separately from the roll shop is a plane-type rotary grindstone, and its disk-shaped base has a flexible elastic body function. Is arranged in contact with the rolling roll,
Even if minute vibrations occur in the rolling roll due to backlash between the rolling roll and the bearing box, or vibration from the rolling mill is transmitted to the grinding wheel of the roll grinding device, the vibration is absorbed by the elastic function of the flat grinding wheel, and the grinding is performed. The change in contact force between the grain layer and the surface of the rolling roll is suppressed, and phenomena such as "chatter" do not occur. For this reason,
The rolling roll can be ground integrally with the bearing box, and the work of disassembling and reassembling the bearing box from the rolling roll becomes unnecessary, and the number of workers required for grinding the rolling roll can be reduced. Also, good grinding of roll surface properties can be performed even near a rolling mill.

(6) In order to achieve the first object, the present invention relates to a rolling roll grinding system, which is installed adjacent to a rolling mill having rolling rolls,
A roll changer that has a side shift cart that can move in a right angle direction, extracts a rolling roll of a rolling mill, and performs a roll change; and a roll roll that is extracted on the side shift cart of the roll changing device is placed on the side shift cart. From other
Rolled rolls after transportation to a location or after grinding elsewhere
And a roll transfer device for returning the roller to the side shift cart. The roll transfer device is disposed at a different place from the roll changing device.
And a roll grinding device for improving the roll surface properties of the rolling roll by entirely grinding the roll surface of the rolling roll conveyed from the lift cart at a constant depth.

This makes it possible to carry out the roll grinding method (1), and to simplify the rolling equipment including the roll shop when performing the rolling roll grinding of the rolling mill of the cold rolling equipment outside the rolling mill.

(7) Further, in order to achieve the first object, the present invention provides a side shift which is installed adjacent to a rolling mill having a rolling roll and can be moved in a direction perpendicular to the roll axis.
A roll exchanging device having a bogie, extracting a rolling roll of a rolling mill and exchanging rolls, and a side of the roll exchanging device
The Saidoshi a rolling roll that has been withdrawn on the shift truck
Transported to another location from the trolley or located in another location
Rolled roll after grinding was returned on the side shift cart
A roll transport means to benefit, in the rolling roll grinding system of this roll conveying means cold rolling and a roll shop to grind the roll profile and surface quality of the object roll surface of the rolling roll which is conveyed by the facility, prior to
The roll shop is located at a different location from the roll changer.
Apart from the roll grinder, before the said roll transport means
A roll grinding device that improves the roll surface properties of the rolling roll by grinding the roll surface of the roll roll conveyed from the side shift cart of the roll changing device at a certain depth shall be arranged. .

Thus, the roll grinding method of the above (3) can be carried out, and when the rolling roll grinding of the rolling mill of the cold rolling facility is performed outside the rolling mill, the grinding facility including the roll shop can be simplified.

(8) In the above (6) or (7), preferably, the roll grinding device attaches an abrasive layer made of superabrasive particles on a circumference of a side surface of a disk-shaped base metal. The rolling roll surface is constant over the grinding range by constant pressure grinding control where the contact force between the flat rotating wheel and the rolling roll and the flat rotating wheel is constant or constant load grinding control where the rotating torque of the flat rotating wheel is constant. Drive control means for grinding at a depth.

(9) In the above (6) or (7), preferably, the roll exchange device has a roll carriage for extracting the rolls in a state where the rolls are vertically arranged from the inside of a rolling mill. One of the exchange device and the roll grinding device is provided with a side shift means for arranging the rolls extracted in a vertically arranged state in a horizontal direction, and inserting the rolls one by one into the roll grinding device to perform grinding. .

As a result, the rolls are pulled out of the roll changer in a state where they are arranged vertically as in the prior art. It is rearranged left and right by means, inserted one by one into a roll grinding device, and ground.

(10) In the above (6) or (7), the roll transport means has a crane and a roll hanger provided at the tip of the crane, and the roll is hung by the crane and the roll hanger. At least one rolling roll extracted from the exchange device is lifted one by one and transported to the roll grinding device.

In this way, the rolls extracted on the roll changing device are generally arranged in the conventional cold-rolling facility in a state where they are arranged one above the other, two rolls at a time, or one by one after being rearranged left and right. It can be transported to a roll grinding device using the provided crane.

(11) In the above (6) or (7), preferably, the roll grinding device is a bearing box holding device for fixing and holding the bearing box so that the rolling roll can be ground integrally with the bearing box. And a flat rotary grindstone installed in contact with one of the upper and lower sides of the rolling roll, and a moving device for moving the flat rotary grindstone in the roll axis direction.

Thus, the surface of the roll can be ground by moving the flat-type rotary grindstone from one end to the other end of the roll in the roll axis direction without separating the rolling roll from the bearing box.

(12) In order to achieve the second and third objects, the present invention provides the rolling roll grinding system according to the above (6) or (7), wherein the roll grinding device is a disk-shaped grinding machine. A flat-type rotary grindstone in which an abrasive layer made of superabrasives is adhered on the circumference of the side surface of the base metal, a rotary drive device for rotating this flat-type rotary whetstone, and a rolling roll for rolling the flat-type rotary whetstone And a disc-shaped base metal having a flexible elastic body function, and the flat rotary grindstone is arranged so that only one portion of the abrasive layer is in contact with the rolling roll.

Thus, as described in the above (5), even if a slight vibration is generated in the rolling roll due to the play between the rolling roll and the bearing box, or the vibration from the rolling mill is transmitted to the grindstone of the roll grinding device, Since the vibration is absorbed by the elastic body function of the flat grinding wheel, the rolling roll can be ground integrally with the bearing box, and the number of workers required for grinding the rolling roll can be reduced. Also, good grinding of roll surface properties can be performed even near a rolling mill.

(13) In the above (12), preferably, a plurality of the flat rotary grindstones are prepared for one roll grinding device, and the properties of the abrasive layer between the plurality of flat rotary grindstones are preferably set. Or make the disk-shaped base have a different elastic body function.

By varying the properties of the abrasive layer between a plurality of planar grinding wheels in this way, the surface properties of the ground roll can be changed and the base metal has different elastic functions. , It is possible to change the removability of the local unevenness.

(14) Further, in the above (6) or (7), preferably, the roll grinding device is capable of grinding two rolling rolls arranged vertically and integrally with a bearing box. A bearing box holding device for fixedly holding the bearing box, a flat rotary grindstone provided on each of the two rolling rolls, and a moving device for moving each flat rotary grindstone in the roll axis direction.

As a result, the two rolls arranged vertically can be set together in a roll grinding device, and the two rolls can be ground simultaneously.

(15) In the above (11) or (14), preferably, the roll grinding device comprises a rotary drive device for rotating a rolling roll supported by a bearing box fixed and held by the bearing box holding device. Have.

(16) The above (11) or (14)
Preferably, the bearing box holding device of the roll grinding device has a cylinder that presses the bearing box against a frame of the roll grinding device.

[0050]

Embodiments of the present invention will be described with reference to the drawings.

First, as a first embodiment of the present invention, FIG. 1 shows an embodiment in which rolling rolls extracted in a state of being arranged vertically from a rolling mill are rearranged left and right and ground one by one. This will be described with reference to FIG.

In FIGS. 1 and 2, the rolling equipment for rolling the cold-rolled steel sheet is a cold rolling mill 3, and the cold rolling mill 3 is a rolling roll 31 for directly extending the cold-rolled steel sheet (this roll is generally a work roll). ), And each has a reinforcing roll 32 for supporting a rolling load, each of which is provided vertically symmetrically with respect to the rolled material. In FIG. 2, the upper roll is denoted by a suffix a, and the lower roll is denoted by a suffix b. At both ends of these rolls 31 and 32, bearing boxes 34 are provided.
Roll 31 is supported by a spindle 38
And is driven to rotate at a target speed. Although not shown, an intermediate roll may be provided between the rolling roll 31 and the reinforcing roll 32 and movable in the roll axis direction according to the width of the cold-rolled steel sheet.

In the rolling of the cold-rolled steel sheet, the cold-rolled steel sheet passes between the rolling rolls 31 pressed with a strong force, so that the roll surface properties of the rolling roll 31 deteriorate as the rolling amount increases. Therefore, it is necessary to replace the rolling roll 31 with a new rolling roll. For this purpose, a roll changer 2 is arranged on the operating side of the mill 3 adjacent to the mill 3 and the used roll 31 is replaced by a new ground roll.

The roll exchanging device 2 is provided with an entire carriage 21 that can travel on the rail 10a in the roll axis direction, and is provided on the rail 10b so that it can travel on the rail 10b in the direction perpendicular to the roll axis. The old rolling roll 31 and the new rolling roll 31 can be moved in a direction perpendicular to the roll axis, and the old rolling roll 31 is extracted from the rolling mill 3 to the side shift bogie 22, and the new rolling roll 31 is pushed into the rolling mill 3. A push-pull device 23 is provided. Also, on the side shift trolley 22,
Two sets of rails 10c are provided in the roll axis direction, and the old rolling roll 31 and the new rolling roll 31
0c so as to be able to run, and is pulled out or pushed into the rolling mill 3 by the push-pull device 23.
The side shift truck 22 is a side shift cylinder (not shown).
) To move on the rail 10b and shift its position.

Further, the used rolling roll 31 is moved to the bearing housing 3.
In order to move the roll hanger 36 integrally to the roll grinding place, the roll hanger 36 can be hung on the tip of a crane 37 as shown in FIG.

The equipment up to this point is a known rolling equipment.
Conventionally, as shown in FIG. 28, the used rolling roll 31 is transported from the roll changing device 2 to the roll shop 100 </ b> A shown in FIG. 28 by the roll shop crane 905, and heated by the chock attaching / detaching device 901 by rolling. After cooling for several hours, the bearing box is extracted from the rolling roll, and then cooled in the roll cooling area 9.
02, where it is further cooled naturally and cooled to room temperature. After that, a rolling machine alone is used for the rolling machine 9 in sequence.
03, and the outer periphery of the roll is ground so as to obtain the optimum roll profile and surface texture (surface roughness) for the target rolling. The ground roll is transferred to a ground roll storage area 904, and when the turn comes, the roll is returned to the roll changing device 2 and re-integrated into the rolling mill 3.

In the present invention, the used rolling roll 3
Instead of transporting the rolls 1 to a roll shop, as shown in FIG. 3, the used rolls 31 used in the roll grinding device 1 installed near the rolling mill 3 are transported one by one or together.
Further, in the roll grinding device 1, the roll surface of the roll is improved by grinding the roll surface of the roll 31 at a constant depth, and the roll is returned to the roll changing device 2 and used again for rolling. I do. At this time, the roll grinding apparatus 1 immediately grinds the rolling roll 31 without cooling it to near room temperature.

As an example, the roll surface temperature when the rolling is completed and the rolls are rearranged is about 120 ° C. to 150 ° C., and the roll surface temperature when grinding by the roll grinding apparatus 1 is about 100 ° C. Roll surface temperature is 7
It is about 0 ° C to 100 ° C.

The "normal temperature" is, for example, about 20.degree. C., and qualitatively speaking, is the temperature at which the roll surface temperature becomes substantially equal to the ambient temperature and the roll profile does not change during grinding, or the roll axis. This is the temperature at which the temperature distribution in the direction and the radial direction becomes uniform.

Grinding by the roll grinding device 1 as described above is performed for the purpose of improving the surface properties of the rolling roll 31.
Correction of the roll profile due to wear of the rolling roll 31 cannot be performed accurately. For this reason, the roll roll 31 is taken out from the rolling mill 3, transported, and the roll grinding device 1
After repeating the steps of grinding and reusing in a plurality of times (for example, about three times), the rolling roll 31 extracted from the rolling mill 3 onto the roll changing device 2 is transported to the roll shop 100,
The roll grinder 903 of the roll shop 100 grinds the roll 31 into a desired roll profile and surface properties, returns the roll 31 to the roll changing device 2, and uses it again for rolling.

As a result, the number of the rolling rolls 31 that need to be ground in the roll shop 100 is reduced to about 比較 of the current roll grinding system, and
a, the roll cooling area 902a, and the ground roll storage area 904a are smaller than the conventional roll storage area 904 shown in FIG. 28, and the number of roll grinders 903 conventionally required at least two may be reduced to one. Therefore, the equipment including the roll grinder of the roll shop 100, the equipment cost of the building, and the number of workers can be significantly reduced.

Next, the overall structure of the roll grinding device 1 is shown in FIG.
This will be described with reference to FIG.

The roll grinding device 1 includes an entire frame 11,
A pair of left and right vertical frames 11a mounted on the entire frame 11, a horizontal frame 11b mounted on the vertical frame 11a, and a grinding wheel traversably supported by a sliding rail 17 mounted on the horizontal frame 11b. And a head 5. The grinding head 5 is provided with a flat rotary grindstone 51 for grinding the rolling roll 31.

The roll grinding device 1 is provided with a rolling roll 31.
In order to set the roll insertion carriage 18, a roll insertion carriage 18 capable of being transported to the roll grinding apparatus 1 in a state where the rolling roll 31 is integrated with the bearing box 34 is provided, and the roll insertion carriage 18 is moved from the roll grinding apparatus 1 in the roll axial direction. Extended rail 19
It is arranged to be able to run on. The roll insertion cart 18 on which the rolling rolls 31 are set is inserted into the entire frame 11 of the roll grinding device 1 by a cylinder or the like. Coupling 1 for rotating and driving rolling roll 31 simultaneously with insertion
The shaft end of the rolling roll 31 is fitted into 4 and is driven by the roll rotating motor 15 to rotate at an arbitrary roll speed.

At the time of grinding, in order to prevent a large displacement of the rolling roll 31 due to the rotation of the roll, the bearing housing 34 is used.
The bearing box holding device 13 for fixing the
Each is mounted on the entire frame 11. The bearing box holding device 13 has a holding frame 13a. The holding frame 13a has a built-in pressing cylinder 131 for pressing the bearing box 34 against the entire frame 11 side.

Further, in order to prevent the wheels of the roll insertion cart 18 from directly receiving the force of the pressing cylinder 131,
For each of the entire frame 11 and the roll insertion cart 18,
Blocks 16a and 16b having a tapered shape are attached, and the wheels of the roll insertion cart 18 are separated from the rails 19 when the roll insertion cart 18 is pushed in.

Next, the rolls extracted in a state where the rolls are arranged up and down from the rolling mill are rearranged left and right, and automatically
The side shift means for setting the roll grinding apparatus 1 one by one will be described.

Roll roll 31 extracted from rolling mill 3
Has a structure in which a spacer is inserted between the upper and lower bearing boxes 34a and 34b so that the upper and lower bearing boxes 34 do not shift and the rolling rolls do not contact each other. This structure will be described with reference to FIG.

In FIG. 6, the lower bearing box 34b is
1 and a rod 342 which is integrated with a lower bush 343 attached to the lower bearing box 34.
It is slidably supported in the vertical direction. When the wheel 341 is mounted on the rail 10c, the upper bearing box 34a
The lower bearing box 34b is lowered in the state where it is lifted, and a gap is formed between the upper and lower rolling rolls 31a and 31b.
In the rolling mill 3, when the rail 10c is lost, the rod 3
42 is lowered, and the upper and lower rolling rolls 31a and 31b come into contact with each other. The rod 342 fits into the upper bearing box 34a so that there is no displacement between the upper and lower bearing boxes 34a and 34b.

The side shift means separates the bearing box 34 having the above structure, and automatically sets the rolling rolls 31 in the roll grinding device 1 one by one.

First, as a first example of the side shift means, an example in which rolling rolls arranged vertically after being conveyed to a roll grinding device are rearranged left and right and set, as shown in FIGS.
This will be described with reference to FIG. In this example, a known roll changing device 2 shown in FIG. 1 is used, and the following equipment as side shift means is added around the roll insertion cart 18 shown in FIG.

In FIG. 7, the upper and lower rolling rolls 31 pulled out on the roll exchanging device 2 are simultaneously lifted by a roll hanger 36, and provided beside the roll grinding device 1 shown in FIGS. It is transported to the roll preparation cart 12.

The roll preparation trolley 12 automatically separates the two rolling rolls 31 and sets them one by one in the roll grinding device 1. After grinding by the roll grinding device 1, the two roll changing devices 2 are integrated again. It has a function to transport to

The roll preparation trolley 12 has a frame 121 for moving the rolling roll 31 in a direction perpendicular to the roll axis.
Two sets of rails 19B that can be connected to 9A are provided, and two roll insertion carts 18 for inserting the rolling rolls 31 into the roll grinding device 1 described above are mounted on the rails 19B. In FIG. 9, the two roll insertion carts are 18a and 18
b, the roll insertion cart 18a is the lower rolling roll 3
1b, and the roll insertion cart 18b is used for the upper rolling roll 3
1a. The roll insertion carriage 18 placed on the frame 121 is moved by rails 19B and 19 by a cylinder 181.
It is moved to the inside of the roll grinding device 1 on A and set. Instead of using the cylinder 181, the roll insertion cart 18 may be a self-propelled carrier.

The frame 121 is arranged on the rail 122 by engaging the pinion 123a of the traversing motor 123 mounted on the frame 121 and the rack 124 in order to rearrange the upper and lower rolling rolls 31 from the vertical direction to the horizontal direction and grind one by one. Can be moved in the direction perpendicular to the roll axis.

Further, two roll lift devices 4 a and 4 b for raising and lowering the upper rolling roll 31 are provided at both ends of the rolling roll 31. The roll lift device 4a includes a tapered shaft 4 inserted into tapered holes at both ends of the rolling roll 31.
1 and a cylinder 42 for pressing the tapered shaft 41
A sliding frame 43 incorporating a tapered shaft 41 and a cylinder 42, an elevating cylinder 45 for raising and lowering the sliding frame 43, and a roll lift frame 44 for guiding the sliding frame 43 when it moves up and down. The roll lift device 4b has the same structure.

By using the above-described roll lift devices 4a and 4b to shift the roll preparation trolley 12, the upper and lower two rolls 31 are separated from each other, and are placed on the respective roll trolleys 18a and 18b as shown in FIG. Rearranged horizontally.

Next, the procedure for inserting the rolling rolls one by one into the roll grinding device 1 one by one using the above-described roll preparation cart 12 and the roll lift devices 4a and 4b and performing the grinding will be described.

The upper and lower rolling rolls 31 are lifted by a roll hanger 36 at the same time, and are transported to the roll preparation cart 12 provided beside the roll grinding device 1.
As shown in (a), two pieces are put together on the roll insertion cart 18a. The tapered shafts 41 of the roll lift devices 4a and 4b provided on both sides of the roll preparation
1a is pressed against the tapered holes at both ends of the sliding frame 43.
The rod 342 integrated with the wheel 341 provided on the lower bearing box 34b by the lifting cylinder 45
Lift up until it gets away from the indentation of a. The frame 121 of the roll preparation trolley 12 is side-shifted to a position where the rail 19B of the roll insertion trolley 18a coincides with the rail 19A of the roll grinding device 1, and the state shown in FIG. The sliding frame 43 is lowered so that the upper rolling roll 31a rests on the roll insertion cart 18b.

The lower rolling roll 31b is inserted into the roll grinding device 1 by the cylinder 181, and
The lower rolling roll 31b is pressed against the entire frame 11 integrally with the bearing box 34b by a pressing cylinder 131 incorporated in the third rolling unit 31. In this state, the lower rolling roll 31b is driven to rotate by the roll rotation motor 15 and is ground using the grinding head 5. After the grinding is completed, the force of the pressing cylinder 131 built in the bearing box holding device 13 is released, and the roll insertion cart 18a is pulled back onto the frame 121 of the roll preparation cart 12.

Next, in order to grind the upper rolling roll 31a, the frame 121 is connected to the rail 1 of the roll inserting cart 18b.
9B side-shifts to a position where it coincides with the rail 19A of the roll grinding device 1, and the state shown in FIG. Like the lower rolling roll 31b, the upper rolling roll 31a is inserted into the roll grinding device 1, and after the grinding, is pulled back to the frame 121 again.

The frame 121 on which the two rolls 31 having been ground is placed is again shifted to the position shown in FIG. 11B, and the upper roll 31a is lifted at this position by the roll lifting devices 4a and 4b. Then, the state is returned to the state of FIG. Further, after the side shift to the position of FIG. 11A, the upper rolling roll 31a is lowered onto the lower rolling roll 31b, and the upper and lower two rolling rolls 31 are returned to the overlapping state.

The upper and lower rolling rolls 31 are lifted by the roll hanger 36 at the same time, transported onto the roll changing device 2 and used for rolling.

In the above embodiment, the roll hanger 3
6, the two upper and lower rolling rolls 31 are placed together on the roll insertion carriage 18a, and then the upper and lower rolling rolls 31 are rearranged in the left-right direction using the roll lifting devices 4a and 4b. Then, the upper and lower rolling rolls 31 were ground by the roll hanger 36.
After the rolls are put together on the roll insertion cart 18a, only the upper rolling roll 31a is lifted by the roll hanger 36 and put on the roll insertion cart 18b, so that the rolls can be rolled one by one without using the roll lift devices 4a and 4b. It can be inserted into the grinding device 1 for grinding.

A second example of the side shift means will be described with reference to FIGS. In this example, the upper and lower rolling rolls are separated to the left and right by using the roll exchanging device 2 before being transported to the roll grinding device.

[0086] In FIGS. 12 and 13, roll replacement instrumentation
The device 2A includes a roll lift device 4a shown in FIG. 8 on both sides of the entire carriage 21 of the known roll change device 2 shown in FIG.
4b.

The used upper and lower rolling rolls 31a, from the rolling mill are placed on the side shift carriage 22 on the roll changing device 2A.
After extracting 31b, the taper shafts 41 of the roll lift devices 4a, 4b are pressed against the tapered holes at both ends of the upper rolling roll 31a, and lifted by the lifting cylinder 45.
The rod 342 incorporated in the lower bearing box 34b is removed from the fitting portion of the upper bearing box 34a. Side shift trolley 22
Is shifted by the side shift cylinder 24, and the lower rolling roll 31b is moved to the center of the entire bogie 21 to obtain the state shown in FIG. In this state, the upper rolling roll 31a and the upper bearing box 34a are lifted one by one by the roll hanger 36,
It is conveyed on the roll insertion cart 18 shown in FIG.

In this example, the work of transporting the rolling rolls 31 is doubled as compared with the first example, but there is no need to provide the roll preparation cart 12 shown in FIG. Since only the roll preparation cart 12 shown in FIG. 4 is required, there is an advantage that the equipment on the roll grinding apparatus 1 side can be simplified.

A third example of the side shift means will be described with reference to FIGS. In this example, as in the second example, two upper and lower rolling rolls are separated to the left and right on the side of the roll changing device 2, but this is another example.

In FIG. 14, a roll carriage 6 is provided on the side opposite to the rolling mill 3 of the roll exchanging device 2B, and the lower rolling roll 31b of the upper and lower rolling rolls 31a and 31b extracted from the rolling mill 3 is used as the lower rolling roll 31b. , So that the rolls 31a and 31b can be easily lifted one by one by the roll hanger 36.

[0091] to roll exchange apparatus 2B, the upper rolling roll 3
Roll lift frames 27a and 27b for separating 1a from the lower rolling roll 31b and moving up and down are provided on both sides of the bearing box 34, respectively. Roll lift frames 27a, 27
b has a cylinder 271 for raising and lowering the upper bearing box 34a.

The roll truck 6 has a whole frame 61 on which the lower rolling roll 31b is mounted, a rail 62 for drawing the lower rolling roll 31b onto the whole frame 61, and a cylinder 64. The rail 61 is a rail 10 on the side shift truck 22.
c and a rail 10d provided on the entire carriage 21. Further, a traversing rail 63 is provided which enables the roll carriage 6 to move in a direction perpendicular to the roll axis of the rolling roll 31.

The upper and lower rolling rolls 31 pulled out of the rolling mill 3 by the push-pull device 23 are shifted by the side shift cart 22, and then the upper bearing box 34a is moved to the roll lift frame 2.
At 7, the rod 342 is lifted together with the upper rolling roll 31 a and the rod 342 is removed from the fitting portion of the upper bearing box 34 a. The lower bearing box 34b is moved by the cylinder 64 to the side shift truck 22.
By moving the upper rail 10c and the rail 62 of the entire frame 61, the lower rolling roll 31b is set on the roll carriage 6 integrally with the lower bearing box 34b. Upper rolling roll 31a
The lower rolling roll 31b is lifted by the roll hanger 36 from above the roll exchanging device 2B and from above the roll carriage 6, and is conveyed onto the roll insertion carriage 18 shown in FIG.

Next, grinding using the grinding head 5 in the roll grinding apparatus 1 will be described.

In FIGS. 4 and 5, the rolling roll 31 is set on the roll insertion carriage 18 and then inserted into the roll grinding device 1 while being mounted on the roll insertion carriage 18. In the roll grinding device 1, after the rolling roll 31 is fixed by the bearing box holding device 13, grinding is performed by the grinding head 5.
The grinding head 5 is arranged so that the flat rotary grindstone 51 is in contact with the upper surface of the rolling roll 31 and traverses the rail 17 to grind from one end of the rolling roll 31 to the other end.

When the rolling roll 31 is ground, it is easier to grind the side surface than the upper and lower surfaces of the rolling roll 31 from the surface on which the grinding head 5 is mounted. However, since the bearing box 34 protrudes forward from the roll on the side of the roll 31, when the grinding head 5 using the flat grinding wheel 51 is mounted to grind the side of the roll 31, At both end positions, the outer periphery of the flat grinding wheel 51 and the bearing box 34a interfere with each other, and it becomes difficult to perform grinding from one end of the rolling roll 31 to the other end. For this reason, in the present embodiment, the rolling roll 31 is used.
The grinding head 5 is attached so as to grind the upper surface of the slab.
Note that a space may be provided below the roll grinding device 1 and the grinding head 5 may be attached to grind the lower surface of the rolling roll 31.

As shown in FIG. 16, the flat rotary grindstone 51 has an abrasive layer 512 on the outer periphery of the side surface of a base metal 511 made of a thin disk, and is driven to rotate by a rotary grindstone shaft 513. The abrasive layer 512 is made of cubic boron nitride abrasive grains or diamond abrasive grains, and has a thickness of about 2 mm to 5 mm in order to reduce the mass of the movable part.

Further, the axis Rb of the grinding wheel rotating shaft 513 is set at a small angle α with respect to the right axis Ra of the axis Rc of the rolling roll 31.
And only one portion of the abrasive layer 512 of the flat rotary grindstone 51 is arranged so as to be in contact with the surface of the rolling roll 31 and be ground. When supported in one place in this manner, a larger deflection can be obtained using the base metal 511 made of the same thin disk.

In order to support and bend the base metal 511 made of a thin disk at one place, the axis of the grinding wheel rotating shaft 513 is offset from the axis of the rolling roll 31 as shown in FIG. The flat-type rotary grindstone 51 may be arranged so as to perform. In this case, it is not necessary to incline the axis Rb of the grinding wheel rotating shaft 513 with respect to the right axis Ra of the axis Rc of the rolling roll 31 by a small angle α (see FIG. 16), and the axis Rb and the axis Rc are set at right angles. To be placed.

The base metal 511 made of a thin disk of the plane type rotary grindstone 51 is flexible and has an elastic function, and a small vibration of the rolling roll 31 causes a small vibration between the abrasive grain layer 512 and the surface of the rolling roll 31 during grinding. The base metal 511 is used to prevent the contact force from changing.
Has a function of absorbing vibration. The spring constant as an elastic body of the base metal 511 made of a thin disk is 1000 kg.
/ Mm to 30 kg / mm. Therefore, rolling mill 3
Even if vibrations are transmitted through the foundation or there are vibrations caused by a gap between the bearing box 34 and the rolling roll 31, it has a function of not deteriorating the surface properties of the ground roll due to “chatter” or the like. .

Since the grinding by the roll grinding apparatus 1 is performed for the purpose of improving the surface properties of the rolling roll 31, the roll profile cannot be accurately corrected due to the wear of the rolling roll 31. For this reason, as described above, after the surface properties of the rolling roll 31 are improved by the roll grinding device 1 provided near the rolling mill 3, the rolling roll 31 is used for rolling, and this is repeated about three times. The roll profile is corrected by the roll grinder of the roll shop 100. Since the number of rolling rolls 31 that need to be ground in the roll shop 100 is reduced to about １ ／ as compared with the current roll grinding system, the number of facilities and operators of the roll shop 100 can be greatly reduced.

Also, in a usual roll grinder, since a cylindrical grinding wheel is used, the grinding roll 31 which is a material to be ground is slightly vibrated during grinding, or the foundation mounted on the grinding device is affected by the vibration. Also cause "chatter" and the like.
For this reason, in order not to be affected by the vibration generated during the rolling operation, the place where the grinding machine is installed is set to a place away from the rolling mill. Further, when the bearing box 34 is integrated with the rolling roll 31, the play between the rolling roll 31 and the bearing box 34 causes vibration during the roll rotation. Grinding is performed with the roll alone.

In the present invention, the grindstone of the roll grinding apparatus 1 is a flat rotary grindstone 51, and its disk-shaped base metal 511 has a flexible elastic function, and only one portion of the abrasive grain layer 512 is rolled. Since the roll 31 is disposed so as to be in contact with the roll 31, a slight vibration is generated in the roll 31 due to a play between the roll 31 and the bearing box 34, and a vibration from the rolling mill 3 is generated by the roll grinding device 1.
Even if it is transmitted to the grinding wheel 51, the vibration is absorbed by the elastic body function of the base metal 511, the change in the contact force between the abrasive layer 512 and the roll surface is suppressed, and the phenomenon such as "chatter" does not occur. For this reason, it becomes possible to set the rolling roll 31 integrally with the bearing box 34 in the roll grinding device 1 and perform grinding.
The operation of disassembling and reassembling the bearing box 34 from the rolling roll 31 is not required, and the number of workers required for grinding the rolling roll 31 can be greatly reduced. Also, good grinding of roll surface properties can be performed even near the rolling mill 3.

The roll 31 requires different roll surface properties depending on the material to be rolled. In order to satisfy such demands, the abrasive layer 512 of the flat-type rotary grindstone 51 is ground by changing the size of the superabrasive material contained in the abrasive layer 512 and the type of the binder fixing the superabrasive material. Roll roll 31
Can be changed in surface properties. By changing the elastic body function of the base metal 511 made of a thin disk supporting the abrasive layer 512, that is, by changing the spring constant of the base metal 511, it is possible to change the removability of local unevenness. By increasing the spring constant, the removability of local irregularities is improved. However, when the same abrasive layer 512 is used, factors such as scratches that deteriorate the surface properties of the rolling roll 31 are waiting. By lowering the spring constant, the removability of local irregularities is reduced, but when the same abrasive layer 512 is used, factors such as scratches that deteriorate the surface properties of the rolling roll 31 can be reduced. The provision of the plurality of planar rotary grindstones 51 enables more appropriate roll grinding.

Next, the structure of the grinding head 5 and details of the control system will be described with reference to FIGS. The structure of the grinding head 5 is substantially the same as that described in JP-A-6-47654.

As shown in FIGS. 18 and 19, the grinding head 5 is a flat rotary grindstone 51 for grinding the rolling roll 31.
522 for rotating the grindstone rotating shaft 513 to which the flat grinding wheel 51 is connected, a pressing device 523 for pressing the flat grinding wheel 51 against the rolling roll 31, and a moving device for moving the flat grinding wheel 51 in the axial direction of the rolling roll 31. 524.

As shown in FIG. 18, the rotary drive unit 522 is provided with an electric motor 554 for driving the plane rotary grindstone 51 to rotate at a predetermined peripheral speed of the grindstone, and an output shaft 554a of the electric motor 554 for rotating the grindstone rotary shaft. 513, a pulley shaft 554b and a belt 555 for transmitting to the output shaft 55.
4a and the pulley shaft 554b are parallel splines 55
4c. Pulley shaft 554b
Is rotatably supported by the body 559. The electric motor 554 is provided with an encoder 554a for detecting a rotation angle of the electric motor 554.

The grindstone rotating shaft 513 is rotatably supported in the body 559 via slide type radial bearings 521a and 521b and movably in the axial direction.
On the opposite side of the grindstone rotating shaft 513 to the grindstone, a flat type grindstone 5
Load cell 5 for measuring contact force between roll 1 and rolling roll 31
53 is housed in the body 559.

The body 559 is housed in a case 525, and the electric motor 554 is mounted on the case 525. The body 559 is, as shown in FIG.
It is mounted on the bottom of the case 525 via a slide bearing 525a so as to be movable in the axial direction of the grindstone rotating shaft 513.

As shown in FIG. 18, the pressing device 523 includes a pressing motor 55 attached to the case 525.
7 and the rotation of the pressing motor 557 to move the body 559 in the direction in which the rolling roll 31 comes into contact with or separate from the rolling roll 31.
1. It has a backlashless type preload ball screw 556 for feeding the grindstone rotating shaft 513 and the load cell 553 back and forth together, and an encoder 557a for detecting the rotation angle of the pressing motor 557. A backlashless type gear mechanism may be used instead of the preload ball screw 556.

[0111] As shown in FIG.
Traverse motor 558 attached to case 525
A pinion 58a mounted on the rotating shaft of the traverse motor 558 and meshing with the rack 514; two pairs of guide rollers 526 mounted on the upper surface of the case 525 and engaging with the sliding rail 17; And an encoder 558b for detecting the As shown in FIG. 4, the sliding rail 17 is horizontally extended across the horizontal frame 11b, and the rack 514 is
Formed on the upper surface. Thus, the grinding head 5
While being supported by the slide rail 17 via the guide roller 526, the traverse motor 558 can be smoothly moved in the roll axis direction by the rotation of the traverse motor 558 and the engagement of the pinion 558a and the rack 514.

The electric motor 554 of the rotary drive 522,
As shown in FIG. 20, the pressing motor 557 of the pressing device 523 and the traverse motor 558 of the moving device 524 are provided with control devices 513a, 513b, and 513, respectively.
c. Further, the encoder 554a of the electric motor 554, the load cell 553, the pressing motor 5
57 encoder 557a, traverse motor 558
The detection signal of the encoder 558b of the information processing device 51
It is sent to 3d for processing. In addition, the control device 513b
Rotational force (load) when rotating the planar rotary grindstone 51
In order to calculate the current, a current flowing through the electric motor 554a is detected, and the detection signal is transmitted to the information processing device 513d.

The information processing device 513d has various processing functions, and outputs the processed signal to the control device 513a,
513b, 513c, and controls the electric motor 554, the pressing motor 557, and the traverse motor 558.

As described above, the roll grinding apparatus 1 improves the surface properties of the rolling roll 31 by grinding the roll surface of the rolling roll 31 at a constant depth. This grinding control method will be described with reference to FIGS.

A first method of grinding the roll surface of the rolling roll 31 at a constant depth is to perform constant-pressure grinding control so that the contact force between the rolling roll 31 and the flat rotary grindstone 51 is constant. FIG. 21 shows a processing procedure of this control.

The flat type rotary grindstone 51 of the grinding head 5 is driven to rotate by the electric motor 554 of the rotary drive 522,
The surface of the rolling roll 31 is ground by being pressed against the surface of the rolling roll 31 by the pressing motor 557 and moving the grinding head 5 along the rail 17 in the axial direction of the rolling roll by the traverse motor 558. During such grinding, the information processing device 513d inputs a detection signal of the load cell 53 (procedure S100), and checks whether the contact force between the rolling roll 31 and the flat rotary grindstone 51 detected by the load cell 53 exceeds a set value. (Step S11)
0), when the contact force exceeds the set value, the rotation direction command value of the pressing motor 557 for moving the flat rotary grindstone 51 in the direction away from the rolling roll 31 is calculated so as to reduce the contact force (step S120). Conversely, when the contact force is equal to or less than the set value, the pressing motor 55 that moves the flat rotary grindstone 51 in the direction toward the rolling roll 31 so as to increase the contact force.
7 (step S130), and outputs these command values to the control device 513a (step S14).
0). The control device 513a creates a command signal according to the command value and controls the rotation direction of the pressing motor 557. As a result, the rolling roll 31 and the flat rotary grindstone 51
Is maintained at a constant set value.

A second method of grinding the roll surface of the rolling roll 31 with a constant depth is to perform a constant load grinding control in which the rotational torque of the flat rotary grindstone 51 is constant. FIG. 22 shows a processing procedure of this control.

The plane type rotary grindstone 51 of the grinding head 5 is rotationally driven by the electric motor 554 of the rotary driving device 522,
The surface of the rolling roll 31 is ground by being pressed against the surface of the rolling roll 31 by the pressing motor 557 and moving the grinding head 5 along the rail 17 in the axial direction of the rolling roll by the traverse motor 558. During such grinding, the information processing device 513d operates the electric motor 554.
Detection signal from the encoder 554a and the control device 51
A detection signal of a current flowing from the motor 3b to the electric motor 554a is input (step S200), and a grinding driving force at a constant wheel rotation speed is calculated (step S210). It is monitored whether or not the driving pressure has exceeded the set value (step S220). If the grinding driving force has exceeded the set value, the planar rotary grindstone 51 is moved away from the rolling roll 31 so as to reduce the grinding driving force. The rotation direction command value of the pressing motor 557 to be moved is calculated (step 230). Conversely, when the grinding driving force is equal to or less than the set value, the plane type rotary grindstone 51 is moved toward the rolling roll 31 so as to increase the grinding driving force. The rotation direction command value of the pressing motor 557 to be moved is calculated (step S24).
0), and outputs these command values to the control device 513a (step S250). The control device 513a creates a command signal according to the command value and controls the rotation direction of the pressing motor 557. As a result, the grinding driving force for grinding the rolling roll 31, that is, the rotational torque of the planar rotary grindstone 51 is maintained at a constant set value.

Next, as a second embodiment of the present invention, 2
FIG. 2 shows an embodiment in which two rolls are ground simultaneously.
This will be described with reference to FIGS.

23 to 25, the roll grinding apparatus 1B has an entire frame 11B.
The bearing box holding device 13B is attached to 1B. The bearing box holding device 13B includes a fixed block 135 attached to an upper portion of the entire frame 11B,
B, a holding block 13b attached to the rear part, and a cylinder 1 built in the holding block 13b, which presses the upper bearing box 34a against the fixed block 135 to remove vertical play.
32. The bearing box holding device 13B is
Similarly, in order to remove backlash from the lower bearing box 34b, the fixing block 136 attached to the holding block 13b is used.
And a cylinder 133 attached to a lower portion of the entire frame 11. Further, the bearing box holding device 13 includes:
It has a cylinder 134 (shown only for the lower bearing box 34b) built in the holding block 13b to remove backlash in the horizontal direction of the bearing boxes 34a and 34b. With such a configuration of the bearing box holding device 13B, the roll grinding device 1B makes the upper rolling roll 31a and the lower rolling roll 31b a bearing box 34.
The grinding can be performed in a state of being firmly fixed to the entire frame 11B integrally with the a and 34b.

A rail 19B on which two upper and lower rolling rolls are mounted and runs extends from the inside to the outside of the roll grinding device 1B, and the two rolling rolls 3 are mounted on the rail 19B.
A push-pull device 182 that integrally inserts and withdraws the roller 1 into and from the roll grinding device 1B is movably mounted.

Further, motors 15a and 15b for driving the rolling rolls 31a and 31b drawn into the roll grinding device 1B to a predetermined grinding rotation speed, and motors 15a and 15b
Spindles 14a and 14b for transmitting the rotational force of the rollers to the rolling rolls 31a and 31b.

Further, a grinding head 5a for the upper rolling roll 31a and a grinding head 5b for the lower rolling roll 31b are provided as the grinding head 5 to which the plane type rotary grindstone 51 is attached, and these grinding heads 5a and 5b are respectively provided. Sliding rail 17 mounted on grinding frames 52a, 52b
The rolls 31a and 31b are mounted so as to be able to traverse in the axial direction via the rolls a and 17b. When the grinding frames 52a and 52b pull the rolling rolls 31a and 31b out of the roll grinding apparatus 1B, the rolling rolls 31a and 31b are used.
In order not to interfere with the grinding heads 5a and 5b, the frame guides 53a and 53b and a cylinder (not shown) can move in the direction perpendicular to the axial direction of the rolling rolls 31a and 31b. The frame guides 53a and 53b are attached to the entire frame 11B.

Next, a roll grinding method using the above-described roll grinding apparatus 19B will be described.

The rolling roll 31 is pulled out from the rolling mill 3 onto the roll exchanging device 2, and the upper and lower two rolling rolls 31 are simultaneously transported together with the bearing box 34 to the roll grinding device 1B by the roll hanger 36, and the rail 19B is moved. Put on top. Further, the two rolls are simultaneously incorporated into the roll grinding device 1B using the push-pull device 182, and the end of the rolling roll 31 is inserted into the spindle 14 at the same time. Upper rolling roll 31
a, After the lower rolling roll 31b and the bearing boxes 34a, 34b are fixed together by the cylinders 132, 133, 134 of the bearing box holding device 1B3 to the entire frame 11B of the roll grinding device 1B, the rolling roll 31 is predetermined by the motor 15. Drive to the grinding rotation speed. The grinding frame 52 is moved to the rolling roll 31 side, and the grinding head 5 is moved from one roll barrel end of the rolling roll 31 to the other end for grinding.

Usually, one rolling roll 31 is ground by using one grinding head 5. In order to grind the two rolling rolls 31 at the same time, it is necessary to arrange the grinding head 5 on the side face or the oblique side face of the rolling roll 31 for grinding. For this reason, with one grinding head 5, the plane rotating grindstone 51 or the grinding head 5 may interfere with the bearing box 34, and there is a possibility that the entire surface cannot be ground from one roll barrel end to the other end. When grinding the entire barrel is required, use one roll 3
It is preferable to use two roll grinding heads 5 for grinding. In this case, the axis Rb of the rotating shaft 513 of the grinding head 5 is arranged at a slight angle in a direction opposite to the axis perpendicular to the axis Ra of the rolling roll 31. Two more grinding heads 5
Is used, when grinding, the axis Rc of the rolling roll 31 and the center of the planar rotary grindstone 51 are arranged so as to be aligned in the height direction. As a result, the grinding stitches of the two flat rotary grindstones 51 are the same in the direction perpendicular to the axis Rc of the rolling roll 31, so that the difference in the direction of the grinding stitches caused by the flat rotary grindstone 51 in the lap portion is prevented. Become.

[0127] As shown in FIG.
If the plane-type rotary grindstone 51 is arranged so that the axis of 13 is offset with respect to the axis of the rolling roll 31, one grinding head 5 is arranged on the side face or the oblique side face of the rolling roll 31, The entire surface can be ground from the barrel end to the other end. In this case, as described above, the grinding wheel rotating shaft 5
It is not necessary to incline the thirteen axes Rb with respect to the right axis Ra of the axis Rc of the rolling roll 31 by a small angle α (see FIG. 16), and the axis Rb and the axis Rc are arranged at right angles.

As described above, the flat rotary grindstone 51 of the grinding head 5 is flexible on the base metal 511 so that it can exhibit an elastic body function.

After the surface of the rolling roll 31 is finished to a desired roughness, the rolling roll 31 is again moved to the push-pull device 182.
And is pulled out from the roll grinding apparatus 1B. The drawn-out rolls 31 transport the two rolls 31 simultaneously onto the roll changing device 2 using the roll hanger 36.

Next, an embodiment in which two rolling rolls 31 are simultaneously transported from the roll changing device 2 to the roll grinding device 1B without using the roll hanger 36 will be described with reference to FIGS. 26 and 27.

In FIGS. 26 and 27, a roll transporting trolley 20 is arranged on the side opposite to the rolling mill of the roll changing device 2C.
The roll transporting trolley 20 is connected to the rail 10a on the side shift trolley 22 of the roll exchanging device 2C and the rail 20a connected in a straight line via the rail 10c provided on the entire trolley 21.
And the two rolls 31 pulled out on the roll changing device 2C can be simultaneously moved from the push-pull device 182 to the roll carrier 20. Below the roll carrier 20 is a roll carrier 20 parallel to the rolling direction.
Is provided. The rail 20b extends to the side of the roll grinding device 1C, and moves the roll carrier 20 on the rail 20b to the front surface of the roll grinding device 1C with two rolling rolls 31 loaded.

Thereafter, the rail 19 of the roll grinding device 1C is used.
A and the rail 20a of the roll transporting trolley 20 are arranged in a straight line, and two rolling rolls 31 are transported simultaneously into the roll grinding device 1C by using the push-pull device 182. The structure of the roll grinding device 1C is the same as that described with reference to FIGS. 23 and 24 except that the rail 19A does not extend outside the roll grinding device. After being inserted into the roll grinding device 1C, grinding is performed by the method described above. After the grinding, the rolling roll 31 is moved to 2
This is simultaneously returned to the roll exchanging device 2C.

By using the above method, the need for a crane operator is eliminated, and furthermore, unmanned rolling roll grinding can be achieved.

According to the second embodiment described above, it is possible to grind two rolling rolls 31 at the same time, so that the grinding capacity per roll grinding device is doubled, and the rolling mill 31 is different from a tandem rolling mill. It is suitable for the case where more surface improvement of the rolling roll 31 is required in a shorter time.

In the first embodiment, the rolling rolls 3
1, that is, the case where the work rolls are set one by one in the roll grinding device and the grinding is described, but the intermediate rolls can be similarly set one by one in the roll grinding device 1 and ground.

In the above embodiment, the grinding of the rolling rolls of the four-high rolling mill has been described. However, the cold rolling mill has a six-high rolling mill in which an intermediate roll is provided between a rolling roll (work roll) and a reinforcing roll. Rolling mills are also widely used. This 6
Also in the case of a step rolling mill, the roll surface roughness of the intermediate rolls deteriorates as the rolling amount increases. For this reason, the rolling roll 3
Although not as frequent, replacement and grinding are required about once a day. This intermediate roll can also be set one by one in the roll grinding device 1 and ground as in the first embodiment.

In the case of the intermediate roll, since the roll diameter is not significantly different from that of the work roll, a total of four work rolls, two upper and lower work rolls and two upper and lower intermediate rolls, are arranged vertically from the rolling mill. By making the extraction and roll grinding device a structure that can rotate and drive four rolls and fix each bearing box, the four rolls can be ground together.

[0138]

According to the present invention, the number of times the rolls of a rolling mill of a cold rolling facility are transported to a roll shop for grinding is greatly reduced. Equipment costs can be reduced.

Further, according to the present invention, since the rolling roll can be ground integrally with the bearing box, it is not necessary to disassemble or reassemble the bearing box from the rolling roll. For this reason, the number of workers required for rolling mill grinding can be significantly reduced.

Further, according to the present invention, good grinding of roll surface properties can be performed even near a rolling mill.

[Brief description of the drawings]

FIG. 1 is a plan view of a rolling roll grinding system according to an embodiment of the present invention.

FIG. 2 is a front view of a rolling mill and a roll changing device of the rolling roll grinding system shown in FIG.

FIG. 3 is a plan view schematically showing an overall configuration including a roll shop of the rolling roll grinding system shown in FIG.

FIG. 4 is a front view of a roll grinding device of the rolling roll grinding system shown in FIG. 1;

5 is a side view of the roll grinding device shown in FIG.

FIG. 6 is a partial sectional view showing a mechanism for separating an upper bearing box from a lower bearing box.

FIG. 7 is a view for explaining a method of transporting the upper and lower rolling rolls from the roll exchanging cart to the roll grinding device integrally with the bearing box.

FIG. 8 is a front view of a roll preparation cart provided with a mechanism for separating the upper and lower rolling rolls conveyed from the roll exchange cart in the horizontal direction.

FIG. 9 is a plan view of the roll preparation cart shown in FIG. 8;

FIG. 10 is a plan view of the roll preparation cart showing a state after the upper and lower rolling rolls have been separated in the left-right direction.

FIG. 11 is a process diagram showing a procedure for separating upper and lower rolling rolls on the roll preparation carriage in the left-right direction.

FIG. 12 is a plan view of a roll exchanging carriage provided with a mechanism for separating upper and lower rolling rolls in the left-right direction.

FIG. 13 is a side view of the roll exchanging cart shown in FIG.

FIG. 14 is a front view of a roll exchanging cart provided with another mechanism for separating the upper and lower rolling rolls in the left-right direction.

FIG. 15 is a view of the roll exchanging cart shown in FIG.

FIG. 16 is a view showing an arrangement state of a flat rotary grindstone attached to a grinding head with respect to a rolling roll together with a cross-sectional view of the flat rotary grindstone.

FIG. 17 is a view showing another arrangement state of the flat rotary grindstone attached to the grinding head with respect to the rolling roll.

FIG. 18 is a longitudinal sectional view taken along a plane parallel to an axial direction of a rolling roll of a grinding head.

FIG. 19 is a vertical cross-sectional view taken along a plane perpendicular to the axial direction of the rolling roll of the grinding head.

FIG. 20 is a diagram illustrating a control system of the roll grinding device.

FIG. 21 is a flowchart showing constant pressure grinding control.

FIG. 22 is a flowchart showing constant load grinding control.

FIG. 23 is a front view of a roll grinding device capable of simultaneously grinding two rolls in a roll roll grinding system according to another embodiment of the present invention.

24 is a plan view of the roll grinding device shown in FIG.

25 is a side view of the roll grinding device shown in FIG.

FIG. 26 is a plan view of a rolling roll grinding system including a roll transport cart that transports two upper and lower rolling rolls simultaneously.

FIG. 27 is a front view of the roll transport cart and the roll changing device shown in FIG. 26.

FIG. 28 is a plan view showing a layout of a rolling facility including a conventional roll shop.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Roll grinding device 2 Roll exchange device 3 Rolling machine 4 Roll lift device 5 Grinding head 6 Roll trolley 11 Whole frame 11a Vertical frame 11b Horizontal frame 13 Bearing box holding device 14 Coupling 15 Rotary drive motor 17 Sliding rail 18 Roll insertion trolley DESCRIPTION OF SYMBOLS 21 Whole trolley 22 Side shift trolley 23 Push-pull apparatus 31 Rolling roll 32 Reinforcement roll 34 Bearing box 35 Housing 36 Roll hanger 37 Crane 41 Tapered shaft 42 Pressing cylinder 43 Sliding frame 44 Roll lift frame 45 Lifting cylinder 51 Flat rotary grindstone 61 Overall frame 62 Rail 63 Traversing rail 64 Cylinder 100 Roll shop 121 Frame 122 Rail 123 Traversing motor 341 Wheel 342 Rod 511 Base metal 51 The abrasive grain layer

Continuation of the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B21B 28/02 B21B 31/08 B24B 5/37 B21B 31/10

Claims (16)

(57) [Claims] (1) moving in a direction perpendicular to a roll axis adjacent to a rolling mill;
Roll change device with a movable side shift cart
And place it in a location separate from the roll changer.
Place Lumpur grinding apparatus, the roll changer from the rolling mill
Withdrawn rolling rolls used in the rolling on the side shift carriage, is the withdrawn mill roll from the side shift carriage of the roll changer of the roll grinding device
Transported to the location, to improve the roll surface texture of the rolling roll by the entire surface grinding with a constant depth roll surface of the rolling roll by the roll grinding device, before the rolling roll
A roll roll grinding method, wherein the roll is returned to a side shift trolley of the roll exchanging apparatus and is used again for rolling. Wherein adjacent rolling mill, moves in the roll axial direction perpendicular
Roll change device with a movable side shift cart
And place it in a location separate from the roll changer.
Place Lumpur grinding apparatus, the roll changer from the rolling mill
Withdrawn rolling rolls used in the rolling on the side shift carriage, is the withdrawn mill roll from the side shift carriage of the roll changer of the roll grinding device
Transported to the location, without cooling the rolling rolls to room temperature closer to the roll grinding unit, the roll surface of the rolling roll entirely ground at a certain depth, the the rolling rolls b <br/> Lumpur changer A method of grinding a roll roll, wherein the roll roll is returned to the side shift cart and used for rolling again. 3. A rolling roll grinding method in a cold rolling facility having a rolling mill and a roll shop, wherein a roll capable of moving in a direction perpendicular to the roll axis is provided adjacent to the rolling mill.
Roll changer with shift gears
In a different place from the roll changer
It was placed, Saidoshifu from the rolling mill of the roll changer
The rolling roll used for rolling is extracted onto a trolley , and the extracted rolling roll is inserted into a side sheet of the roll changing device .
Transported from the shift carriage and the location of the said roll grinding device, to improve the roll surface texture of the rolling roll by the entire surface grinding roll surface of the rolling roll at a constant depth by the roll grinding apparatus, the rolling roll back on the sideshift carriage of the roll changer, it used to rolling again, withdrawal of the rolling roll, conveying, grinding, after the reuse step was repeated several times, the roll changer from the rolling mill
The roll roll extracted to the side shift cart is conveyed to the roll shop, and the roll roll is ground in the roll shop to a desired roll profile and surface properties,
This rolling roll is moved to a side shift table of the roll changing device.
A rolling roll grinding method characterized by being returned to a vehicle and used for rolling again. 4. The method according to claim 1, wherein the roll grinding device is formed by super-abrasive grains formed on a circumference of a side surface of a disk-shaped base metal. Using a roll grinding device with a plane type grinding wheel with a layer attached, constant pressure grinding control where the contact force between the rolling roll and the plane type grinding wheel is constant, or constant load grinding where the rotation torque of the plane type grinding wheel is constant A rolling roll grinding method characterized in that the rolling roll surface is ground at a constant depth over a grinding range by control. 5. A method according to claim 1, wherein said roll grinding device comprises abrasive grains formed of superabrasive grains on a circumference of a side surface of a disk-shaped base metal. Using a roll grinding device having a plane-type rotary grindstone to which a layer has been attached, giving the disk-shaped base metal a flexible elastic body function,
A rolling roll grinding method, comprising: arranging the flat rotary grindstone so that only one location of the abrasive layer is in contact with the rolling roll, and grinding the rolling roll. 6. A side shift cart installed adjacent to a rolling mill having a rolling roll and movable in a direction perpendicular to the roll axis.
A roll exchanging device for extracting a rolling roll of a rolling mill and exchanging a roll, and a side shifter of the roll exchanging device
Side shift of the rolls extracted on the trolley
Conveyed to other places from the trolley or grinding elsewhere
Return the rolling roll afterwards to the side shift cart
A roll transport means that, different location and the roll changing device
And the roll is exchanged by the roll conveying means.
A roll roll grinding system comprising: a roll grinding device that improves the roll surface properties of the roll by rolling the roll surface of the roll roll conveyed from a side shift cart of the apparatus at a predetermined depth. 7. A side shift cart installed adjacent to a rolling mill having a rolling roll and movable in a direction perpendicular to the roll axis.
A roll exchanging device for extracting a rolling roll of a rolling mill and exchanging a roll, and a side shifter of the roll exchanging device
Side shift of the rolls extracted on the trolley
Conveyed to other places from the trolley or grinding elsewhere
Return the rolling roll afterwards to the side shift cart
A roll roll grinding system of a cold rolling equipment, comprising: a roll transporting means; and a roll shop for grinding a roll surface of a rolling roll transported by the roll transporting means to a desired roll profile and surface properties. In a different place from the device, separate from the roll grinder of the roll shop , by the roll conveying means
Conveyed from the side shift trolley of the roll changing device
A rolling roll grinding system, comprising a roll grinding device for improving the roll surface properties of the rolling roll by completely grinding the roll surface of the roll at a constant depth. 8. The rolling roll grinding system according to claim 6, wherein the roll grinding device has an abrasive layer made of superabrasives attached to a circumference of a side surface of a disk-shaped base metal. The surface of the rolling roll is brought to a constant depth over the grinding range by the constant-pressure grinding control in which the contact force between the flat rotating wheel and the rolling roll and the flat rotating wheel is constant or the constant load grinding control in which the rotating torque of the flat rotating wheel is constant. And a drive control means for grinding by means of a roll. 9. The rolling roll grinding system according to claim 6, wherein said roll exchanging device has a roll carriage for extracting said rolling rolls in a state of being arranged vertically in a rolling mill. One side of the roll grinding device is provided with a side shift means for rearranging the rolls extracted in a vertically arranged state, and the rolling rolls are inserted one by one into the roll grinder to perform grinding. And rolling roll grinding system. 10. The rolling roll grinding system according to claim 6, wherein said roll transport means comprises: a crane;
A roll hanger provided at a tip of the crane, wherein the crane and the roll hanger lift at least one roll taken out on the roll changing device and transport the roll to the roll grinding device. And rolling roll grinding system. 11. A rolling roll grinding system according to claim 6, wherein said roll grinding device is a bearing box holding device for fixedly holding a bearing box so that a rolling roll can be ground integrally with the bearing box. A rolling roll grinding system, comprising: a flat rotary grindstone installed to be in contact with one of an upper side and a lower side of a roll; and a moving device for moving the flat rotary grindstone in a roll axis direction. 12. The rolling roll grinding system according to claim 6, wherein the roll grinding device has an abrasive layer made of superabrasives attached to a circumference of a side surface of a disk-shaped base metal. A flat rotary grindstone, a rotary drive for rotating the flat rotary grindstone, and a pressing device for pressing the flat rotary grindstone against a rolling roll, wherein the disk-shaped base metal has a flexible elastic body function. A rolling roll grinding system, wherein the flat rotary grindstone is arranged so that only one location of the abrasive layer is in contact with the rolling roll. 13. A rolling roll grinding system according to claim 12, wherein a plurality of said plane type rotary grinding wheels are prepared for one roll grinding device, and an abrasive layer is formed between said plurality of planar type grinding wheels. A roll roll grinding system characterized by different properties or a disk-shaped base having a different elastic body function. 14. The rolling roll grinding system according to claim 6, wherein the roll grinding device is arranged vertically and is capable of grinding two rolling rolls integrally with the bearing housing. A bearing box holding device for fixedly holding the rolling rolls, a flat rotary grindstone provided on each of the two rolling rolls, and a moving device for moving each flat rotary grindstone in the roll axis direction. Rolling roll grinding system. 15. The rolling roll grinding system according to claim 11, wherein said roll grinding device has a rotary drive device for rotating a rolling roll supported by a bearing box fixedly held by said bearing box holding device. A rolling roll grinding system, characterized in that: 16. The rolling roll according to claim 11, wherein the bearing box holding device of the roll grinding device has a cylinder for pressing the bearing box against a frame of the roll grinding device. Grinding system.