KR20020034856A - On-line Roll Grinding Apparatus, On-line Roll Grinding Method, Rolling Mill Equipment And Rolling Method - Google Patents

Abstract

PURPOSE: To condition a surface roughness of roll by means of online roll grinding. CONSTITUTION: This features in a grinding measure with a rotary grindstone for online roll grinding and a conditioning measure for surface roughness of this roll.

Description

Online Roll Grinding Equipment, Online Roll Grinding Method, Rolling Equipment and Rolling Method {On-line Roll Grinding Apparatus, On-line Roll Grinding Method, Rolling Mill Equipment And Rolling Method}

The present invention relates to an on-line roll grinding facility, an on-line roll grinding method, a rolling facility, and a rolling method.

Rolling rolls are frequently exchanged with rolling rolls that are ground in roll shops when the rolled portion is in contact with the rolled material and the rolled steel sheet of the desired quality cannot be rolled. Since it is necessary to stop rolling in order to replace this rolling roll, production is inhibited.

Japanese Laid-Open Patent Publication No. 6-47654 discloses a technology of a rolling mill equipped with an on-line rolling mill suitable for a hot-rolling mill mainly for grinding a rolling roll inside a rolling mill in order to further improve such a decrease in productivity. The on-line roll grinding device in this technique rotates and drives the rotating grindstone attached to the large-size metal, which is a thin disk, having an elastic body function, which is formed by the CBN (cubic boron nitride) abrasive grain. Grinding.

In online roll grinding, grinding of grinding wheels from 1000 to 1500 rpm is recommended in order to increase grinding capacity and increase grinding life. When the grinding is carried out under these conditions, the surface roughness of the rolled roll made of nickel grain material is ground from Ra 1.2 micron to 0.7 micron. Even when a large abrasive grain is used, as the grinding progresses, the cutting edge of the abrasive grain becomes smooth, and the roll surface roughness becomes roughness of Ra1.2 microns or less.

However, in the rolling rolls used in the rough rolling equipment of hot rolling mills, the roughness of Ra1.5 to 3 microns is used to prevent the rolling rolls of the rough rolling mill from slipping between the rolling rolls and the slab materials when the slab material is filled. It is preferable to grind as much as possible.

However, in the above prior art, the on-line rolling grinding has not been considered, and an on-line roll grinding device that can be ground to maintain a rolled roll surface roughness suitable for rough rolling is desired.

An object of this invention is to adjust the surface roughness of the rolling roll in online grinding.

That is, the on-line roll grinding installation of this invention aims at providing the grinding means provided with the rotatable grindstone which grinds a rolling roll on-line, and the roughness adjustment means which can adjust the surface roughness of this rolling roll.

Moreover, the on-line roll grinding method of this invention grinds this rolling roll on-line by the grinding means provided with the rotatable rotary grindstone which grinds a rolling roll on-line, and grinds in the substantially circumferential direction of the rolling roll after that. It aims at making a grain and adjusting the surface roughness of a rolling roll.

Moreover, the rolling equipment of this invention aims at providing the grinding means provided with the rotatable rotary grindstone which grinds a rolling roll online, and the roughness adjustment means which can adjust the surface roughness of this rolling roll.

In addition, the rolling method of this invention grinds this rolling roll on-line by the grinding means provided with the rotatable rotary grindstone which grinds a rolling roll on-line, and makes a grinding grain in the substantially circumferential direction of the rolling roll after that, and rolls it. It aims at rolling, adjusting the surface roughness of a roll.

1 is a partial top view of a rolling mill with on-line roll grinding equipment.

2 is a plan view and a block diagram in a roll grinding device unit.

Fig. 3 is a side sectional view in the roll grinding device unit.

4 is a partial cross-sectional view of a rolling mill with on-line roll grinding equipment.

Fig. 5 is a side view showing a partial configuration of a rolling mill having an on-line roll grinding facility, according to the arrow A-A in Fig. 1;

FIG. 6 is a fragmentary view taken from the roll face side of a rolling mill with an on-line roll grinding facility, taken along arrow B-B in FIG. 1; FIG.

Fig. 7 is an operation diagram when grinding the rotating grindstone and the grindstone not rotating.

8 is a grinding flowchart showing a grinding operation of a rotating grindstone and a non-rotating grindstone;

<Explanation of symbols for the main parts of the drawings>

1a: rolled roll

1b: reinforcement roll

3: bearing box

5: roll grinding device unit

10: entrance guide

15: coolant header

20: rotating grindstone

21: grinding wheel rotation axis

23: grinding wheel transfer device

52: thin disk

58: traverse motor

71: grinding plate

77: pressure control valve

Example 1

Hereinafter, the present invention will be described in detail with reference to Examples. Fig. 4 shows a partial cross-sectional view of a rolling mill with on-line roll grinding equipment, and Fig. 1 shows a partial longitudinal cross-sectional view of a rolling mill with on-line roll grinding equipment.

In FIG. 4, the upper side of the rolling mill is shown. In fact, the lower side has the same structure. The rolling mill which concerns on a present Example has four stages which have a pair of top and bottom rolling rolls 1a which extend the rolling material S, and a pair of top and bottom reinforcement rolls 1b which respectively support the rolling roll 1a. Rolling mill. However, this invention is applicable also to rolling equipment other than a four-stage rolling mill. As shown in FIG. 1, the rolling roll 1a is rotatably supported by the bearing box 3, and these bearing boxes 3 are knitted on the stand 4 which is a rolling housing. As shown in FIG. 4, the side guide 10 is arrange | positioned at the side into which a rolling mill enters, This side guide 10 guides the rolling roll 1a of the rolling material S. As shown in FIG. In the rolling mill of this embodiment, the roll bender 30 is provided between the bearing 3 and the bander block 30a in order to apply the bending force perpendicular | vertical to the rolling roll 1a. In addition, a coolant header 15 for spraying cooling water for cooling the rolling roll 1a is provided.

In such a rolling mill, the on-line roll grinding installation which grinds the rolling roll 1a during rolling is provided. The online roll grinding facility has one or a plurality of roll grinding device units 5 for one rolling roll 1a. For example, in FIG. 4, it has the roll grinding apparatus unit 5 which grinds a pair of upper and lower rolling rolls 1a on line. In this description, grinding of the upper rolling roll 1a is demonstrated as a representative. In addition, it is necessary for the roll grinding apparatus unit 5 not to interfere with the bearing 3 at the time of roll replacement. Both ends of the rail 12 are slidably supported by the guide 13 mounted on the stand 4. The roll grinding device unit 5 is integrated with the rail 12 by the cylinder 11 and the guide 13. Can be moved backwards.

Next, the internal structure of the roll grinding apparatus unit 5 is demonstrated using FIG. 2 and FIG. Fig. 2 shows a plan view and a block diagram in the roll grinding apparatus unit, and Fig. 3 shows a side sectional view in the roll grinding apparatus unit.

The roll grinding device unit 5 is a planar rotary grindstone 20 for grinding the rolling roll 1a during rolling, and a grindstone rotation drive device 22 for rotating the rotary grindstone 20 through the grindstone rotation shaft 21. And a grindstone conveying device 23 for pushing the rotating grindstone 20 to the rolling roll 1a, and a grindstone traverse device 24 for moving the rotating grindstone 20 in the roll axis direction of the rolling roll 1a. have.

The rotating grindstone 20 has the grindstone layer 51 which consists of super abrasive grains, and the thin disk 52 which has the elastic body function which supports the grindstone layer 51. As shown in FIG. The thin disk 52 having the grindstone layer 51 on one side is mounted on the grindstone rotation shaft 21 and rotated by the rotation of the grindstone rotation shaft 21. The rotary grindstone 20 is rotated by the rotation operation of the hydraulic motor 54 being transmitted through the grindstone rotating shaft 21 which is a pulley shaft, a belt, and an output shaft.

When the rotary grindstone 20 is pushed to the rolling roll 1a by the grindstone conveying apparatus 23 which is a pushing means, the rotary grindstone 20 is bent by the elastic function of the thin disk 52. The amount of warpage varies depending on the contact force between the rolling roll 1a and the rotating grindstone 20. By this bending, vibration of the rolling roll 1a during rolling can be absorbed, and favorable grinding can be implement | achieved.

Moreover, since the grindstone rotating shaft 21 makes only one side of the rotating grindstone 20 contact a rolling roll 1a, it is preferable to arrange | position it with a small angle with respect to the axial perpendicular | vertical line of the rolling roll 1a. The load cell 53 which measures the contact force between the rotating grindstone 20 and the rolling roll 1a is arrange | positioned at the semi-rotating grindstone side of the rotating grindstone 21. As shown in FIG. In this embodiment, the information processing apparatus 14 which controls the grindstone conveying apparatus 23 and the grindstone traversing apparatus 24 from the contact force information of the load cell 53 is provided. In addition, the detailed structure and operation | movement in the roll grinding apparatus unit 5 are described, for example in Unexamined-Japanese-Patent No. 6-47654.

The roll grinding device unit 5 is moved in the roll axis direction by the grindstone traverse device 24. As shown in Figs. 3 and 4, the grindstone traverse device 24 is provided with a traverse motor 58 provided in a case 25 for housing the roll grinding device unit 5, and the traverse motor 58 The attached rotating shaft and the rack, pinion, etc. which convert the rotational force from this rotating shaft to a roll axis direction are provided. The rotation of the traverse motor 58 engages the guide roller 26 along the rail 12 and moves the roll grinding device unit 5 in the roll axis direction.

The grindstone conveying apparatus 23 performs the operation (retraction operation) of pushing the rotating grindstone 20 to the rolling roll 1a by the ball screw type by the rotational drive of the feed motor 57. As shown in FIG.

In this embodiment, the surface roughness adjusting means (second grinding means) is provided separately from the above-described grinding means (first grinding means). 1 and 5 are the abrasive grains 7 shown in FIG.

The abrasive device 7 of this embodiment includes an abrasive layer 72, a grinding plate 71 which is a die sheet of the abrasive layer 72, a slide rod 74 which is an axis supporting the grinding plate 71, and , The bearing 73 of the linear bearing structure movably supporting the slide rod 74 in the pushing direction (the direction in which the abrasive grain layer 72 is pushed by the roll), and the slide rod 74 in the pushing direction. Pushing cylinder 75 which is a moving means to make, switching valve 76 which switches back and forth in the pressing direction of pushing cylinder 75, and pressure control valve which adjusts the pressure supplied to pushing cylinder 75 A pressure pump for supplying pressure to the pushing cylinder 75 through the pressure control valve 77 is provided.

Here, the abrasive device 7 does not rotate the grinding plate 71 at the time of grinding. And this abrasive grain apparatus 7 is attached to the case 25 which accommodates the roll grinding apparatus unit 5.

The structure of the grinding plate 71 has the structure which stuck the abrasive grain layer 72 to one side on the surface. Then, the grinding plate 71 is fixed to one side girders to give the grinding plate 71 an elastic body function. Since the spring constant of the elastic body function of the grinding plate 71 has the function of absorbing the vibration of the rolling roll 1a, the spring constant of the thin disk 52 of the rotating grindstone 20 having the elastic body function described above is good. That is, it is preferable to use the grinding plate 71 having a spring constant in the range of 9800 KN / mm to 300 KN / mm.

The abrasive grain layer 72 and the grinding plate 71 are equipped with the pressing means with respect to the roll which can be operated individually. That is, it has the pushing cylinder 75 so that contact and non-contact can be arbitrarily specified with respect to the rolling roll 1a. And the grinding plate 71 is pushed to the rolling roll 1a in this pushing cylinder 75, and when not grinding, the operation | movement of the pushing cylinder 75 is switched so that it may retract from the rolling roll 1a. The switching valve 76 is provided.

The push cylinder 75 may be either hydraulic or pneumatic. However, since the push force here is only a small force of about 19.6 KN / mm with respect to the grindstone width 1mm, the pneumatic type can easily control the push force. In this embodiment, since the grinding plate 71 is pushed to the rolling roll 1a via the pushing cylinder 75 and the slide rod 74, it is a structure which can be retracted when not using. The slide rod 74 is held as a bearing 73 of a linear bearing structure that can slide back and forth without swinging.

The abrasive grain layer 72 attached to the grinding plate 71 does not rotate about the roll radial direction. In this state, when the abrasive grain layer 72 is pushed onto the rotating rolling roll 1a, a peripheral speed difference occurs between the abrasive layer 72 and the rotating rolling roll 1a. The rolling roll 1a is ground. However, since the abrasive grain layer 72 does not rotate about the radial direction of the roll, the grinding ability such as the above-described rotary grindstone 20 cannot be improved, but the rolled roll 1a is caused by the abrasive grain in the abrasive grain layer 72. It is possible to leave almost no grain in the circumferential direction of the roll on the surface of the roll.

That is, the grinding ability mainly used for grinding amount falls, but it is excellent in leaving a grinding grain. By controlling the depth of this grinding grain, the surface of the rolling roll 1a can be adjusted to target roughness. That is, since the means which produces the grinding grain of the roll circumferential direction is provided in this way, surface roughness adjustment is possible.

The direction of grinding by the abrasive grain layer 72 affixed to the grinding plate 71 is a roll circumferential direction (roll rotation direction), since the fixed abrasive grain layer 72 is pushed and grind | pulverized to the rotating roll. However, since the abrasive grain layer 72 attached to the grinding plate 71 is moved in the roll axis direction during grinding, the grinding grains are slightly inclined and the grinding grains are almost roll circumferential.

The abrasive grain of the grindstone which adjusts the roughness of this surface is demonstrated. In general, the surface of the rolled roll 1a ground with a rotating grindstone or the like even in an abrasive grain layer made of abrasive grains of the same size is smaller in roughness than the surface of the rolled roll 1a ground with the abrasive grain device 7. The abrasive grain layer 72 has an abrasive grain in the surface of the rolling roll 1a, and can make surface roughness Ra1.5 micrometer or more. However, when a general abrasive grain made of alumina oxide or the like is used, since the hardness of the abrasive grain is low, it is difficult to dig into the rolling roll 1a and leave sharp grinding grains. In addition, the life of the grindstone itself is short, and frequent replacement of the grindstone is required. Therefore, it is not very suitable for the on-line grinding performed during rolling inside a rolling mill.

Therefore, in the case of the abrasive grain layer 72 of this embodiment, since the force which the abrasive grain dug into the rolling roll 1a receives is large, the abrasive grain layer 72 uses a diamond abrasive grain or a cubic boron nitride (CBN) abrasive grain with high hardness. have. Thus, abrasive grains with high hardness can penetrate into the surface of the rolling roll 1a, leaving behind sharp grinding. In addition, the life of the grindstone itself is long, which reduces the frequency of grinding the grindstone. Therefore, it is suitable for the on-line grinding performed during rolling inside the rolling mill.

Usually, as for the rolling roll 1a used for rough rolling equipment, it is preferable to make the surface roughness into about Ra2micrometer. However, when it is necessary to change the roughness of the rolling roll 1a according to the rolling conditions, the force generated by the cylinder 75 is controlled by the pressure control valve 77 to control the abrasive grain layer 72 and the rolling roll 1a. To change the contact force. Therefore, the surface roughness of the rolling roll 1a can be changed by changing the contact force of the abrasive grain layer 72 and the rolling roll 1a.

Next, the grinding in actual rolling is demonstrated. The portion through which the rolled material passes deteriorates metallicly due to heat of the rolled material and the like as the rolling proceeds. Therefore, first, the surface of this deteriorated rolling roll 1a is ground by the rotation grindstone 20 of the roll grinding apparatus unit 5. FIG. This grinding pushes the rotary grindstone 20 to the rolling roll 1a with the grindstone feeder 23 while rotating the rotary grindstone 20 through the grindstone rotation shaft 21 by the grindstone rotation drive device 22. To perform. Then, the grinding wheel 20 is moved in the roll axis direction by the grinding wheel traverse device 24 to grind the surface of the rolling roll 1a. This planar rotary grindstone 20 itself is bent and ground while absorbing roll vibration during rolling, so that the roll surface can be ground cleanly. That is, when grinding is performed by the rotary grindstone 20, the surface of the rolling roll 1a is ground to a surface thinner than desired roughness while grinding and removing the surface part which was deteriorated metallicly.

After grinding to the rotary grindstone 20, the non-rotating abrasive grain layer 72 is pushed by the pushing cylinder 75 to the surface of the rolling roll 1a so that the rolling roll 1a may have a surface roughness. Create circumferential grinding. Appropriate roughness can be obtained by making grinding grains into the above-mentioned roughness surface.

Next, arrangement | positioning and concrete grinding of the granulation layer 72 which are roughness adjustment means are demonstrated. The case where the abrasive grain apparatus 7 which does not rotate only in one side of the rotating grindstone 20 in the roll axis direction is demonstrated using FIG. 7 and FIG. The arrangement and the movement relationship are shown in FIG. 7, and the grinding flow is shown in FIG.

First, as shown in (1) step of FIG. 8, the rotary grindstone 20 is moved to the rolling roll 1a end part. And when grinding the part L (board | board area | region) through which the rolling material shown in FIG. 7 passes, the rotary grindstone 20 contacts the rolling roll 1a like step (2) of FIG. Start from. In other words, portions other than the portion L through which the rolled material passes (out of the plated region) do not come into contact with the rolled material, and the portion L that contacts the rolled material wears out to cause a step in both parts. Therefore, at the time of grinding, grinding is started from the roll end part in order to grind the part (outside the plate region) other than the part L through which a rolling material passes.

After that, grinding is performed while moving the rotary grindstone 20 in the opposite direction (a direction) in which the abrasive grain device 7 is arranged as shown in Fig. 8 (3).

Next, as shown in the step of Fig. 8 (4), the movement of the grinding position of the rotary grindstone 20 to the maximum plate width position (maximum plate width end position of the rolled rolling material) is detected by an axial moving device or the like. If the maximum plate width position in this rolling roll 1a is detected, the non-rotary granulation apparatus 7 which is an illuminance adjustment means will be pushed to the rolling roll 1a as shown in the step of FIG. Start grinding (adding grinding grains for roughness adjustment). Here, as shown in FIG. 8 (6), the grindstone device 7 and the rotation grindstone 20 which do not rotate are moved in the a direction while grinding together. That is, in this method, roughness adjustment is performed with respect to the board | plate part (plate drawing) of the rolling material which requires roughness adjustment, and the consumption of the grindstone of the abrasive grain apparatus 7 which is roughness adjustment means is suppressed. In addition, since the means for pushing the abrasive grain 7 which is an illuminance adjustment means to a roll and the means which pushes the rotary grindstone 20 which is a grinding means to a roll are provided separately, respectively, grinding suitably suitable for each plate and plate, etc. And illuminance adjustment becomes possible.

As shown in step (7) of FIG. 8, when the grinding position of the rotary grindstone 20 is moved to the center portion of the rolling roll 1a, the rotary grindstone 20 and the non-rotating grindstone device 7 are rolled rolls 1a. Stop grinding.

As described above, almost half the region (right half in FIG. 7) of the rolling roll 1a can be ground in the roll axis direction, and the roughness can be adjusted. In the other left half region, the grinding grindstone 20 and the grindstone grinder 7 which do not rotate may be provided similarly to the other side, and grinding and roughness adjustment may be performed similarly.

In addition, when the rotating grindstone 20 or the non-rotating grindstone device 7 is moved after grinding and roughness adjustment, both the rotating grindstone 20 and the non-rotating grindstone device 7 are placed on the surface of the rolling roll 1a. Both of the rotating grindstone 20 and the non-rotating grindstone device 7 are retracted toward the half-center side of the roll so as not to contact, and both are moved in the end direction (b direction) in the roll axis direction.

In this embodiment, the rotation grindstone 20 which is a grinding means and the roll axis direction movement means of the grindstone device 7 which are roughness adjustment means share, and the installation can be simplified. That is, since the abrasive grain apparatus 7 which is roughness adjustment means is attached to the roll grinding unit 5 which is grinding means, the movement means to roll axial direction movement can also be combined, and the installation can be simplified.

Moreover, as a means for making grinding grains in the roll circumferential direction, a grindstone or the like that rotates about an axis parallel to the roll axis can be considered, and the roughness of the roll surface can be adjusted. However, the abrasive grain device 7 mentioned above is excellent in terms of equipment and precision. Since the above-described abrasive device 7 is non-rotating, the facility is simple and easy to install. In addition, since the above-mentioned abrasive grain device 7 can use a plastic elastic body as a die sheet, it can make grinding grains, absorbing the vibration of the rolling roll at the time of on-line during rolling, so that the grinding grains of a roll circumferential direction can be precisely attached. Can be.

The part L through which a rolled material passes is not the whole width of the rolling roll 1a but is a width of 2/3 to 1/2 in many cases. Therefore, the range grinding by the abrasive grains 7 which do not rotate in many cases does not require the whole width of the rolling roll 1a. If necessary grinding range is grind | pulverized the maximum rolling material width rolled between one rolling roll 1a exchange, the range which a rolling material and the rolling roll 1a contact can always be maintained to required roughness. There is no problem even when grinding with the abrasive device 7 which does not always rotate the rolling roll 1a full width, but when grinding with the abrasive device 7 which does not rotate the range which is not needed, the consumption of the abrasive layer 72 which does not rotate is lost. Problem arises.

Here, when rolling a slab material or a hot thick steel sheet corresponding thereto, the rolling roll 1a which has been ground as described above has an appropriate roughness, so that it will slip between the rolling roll 1a and the hot steel piece when it is bitten in. There is no concern. In this embodiment, since the roughness of the roll surface can be adjusted to a desired roughness, the roll surface roughness can be roughened, and the meshing properties of the rolling mill or the rolling equipment can be improved. This embodiment can be applied to various roughing mills, finish rolling mills, rough rolling facilities and finish rolling facilities, and the like, and particularly, problems of meshing properties, such as rough rolling facilities in the hot field, can be solved remarkably.

According to this embodiment, in the rolling equipment used for rolling slab materials such as rough rolling mill, the rolling roll surface is not rotated apart from the rotating grindstone which removes the wear step of the rolling roll in order to make the rolling roll surface roughness Ra2μm to 4μm. A non abrasive grain layer is pushed on a rolling roll, and the roughness of roughness on a roll surface can be made by the speed difference with a rolling roll.

As a result, when a thick material such as a slab material is passed into the rolling roll, it can be made to a suitable rolling roll surface roughness to prevent rolling trouble due to slip and the like and can always be rolled into a rolling roll having a small wear step.

That is, by performing grinding and roughness adjustment during rolling similar to the present embodiment, the problem of pinching during rolling can be suppressed. The abrasive roll, which is not rotated separately from the rotary grinding, is mounted on an on-line roll grinding device on the plate at the tip of the pusher that can move forward and backward, and the abrasive layer is pushed on the rolled roll to grind at the speed difference between the roll rotation and the fixed abrasive layer. Do this.

When the abrasive grain layer attached to the plate at the tip of the pushing device is fed into the rolling roll, it is possible to obtain a roll surface having a coarse roughness that cannot be obtained by grinding the grinding wheel.

In the hot rolling equipment, when the roll of the rough rolling mill for rolling the slab material is ground with the on-line grinding equipment installed in the rolling mill, the roll surface roughness of the roll surface and the rolled material is not reduced when the water is pulled in even under high pressure rolling. It can be made into a roughness of 5 µm or more.

An on-line roll grinding device is equipped with an abrasive grain layer that does not rotate separately from the rotating grindstone on the plate at the tip of the pusher device capable of retreating forward, and pushes the abrasive layer with a rolled roll to grind at the speed difference between the roll rotation and the fixed abrasive layer. As a result, the abrasive grain layer attached to the plate at the tip of the pushing device is fed into the rolling roll, thereby obtaining a roll surface having a rough roughness that cannot be obtained by grinding the grinding wheel.

This invention provides the on-line roll grinding installation provided with the grinding means provided with the rotatable rotary grindstone which grinds a rolling roll on-line, and the roughness adjustment means which can adjust the surface roughness of this rolling roll.

Claims (12)

Grinding means 5 provided with the rotatable rotary grindstone 20 which grinds the rolling roll 1a online, and the roughness adjusting means 7 which can adjust the surface roughness of this rolling roll is provided, It is characterized by the above-mentioned. Online roll grinding equipment. First grinding means (15) having a rotatable rotary grindstone (20) for grinding the rolling roll (1a) on-line, and second grinding means (7) capable of forming a grinding grain in a substantially circumferential direction of the rolling roll. On-line roll grinding equipment comprising the. A rotating grindstone 20 mounted so as to face the rolling roll 1a, a grindstone driving device 22 for rotationally driving the rotating grindstone, and a pushing device 23 for pushing the rotating grindstone against the rolling roll. In the on-line roll grinding equipment which has the grindstone apparatus 5 provided with the provision of the traverse apparatus 24 which moves this grindstone apparatus to a rolling roll axis direction, On-line roll grinding equipment characterized by providing a grindstone having a non-rotating abrasive grain layer (72) in the grindstone device. The non-rotating abrasive grain blowing device (23), which is capable of moving forward and backward, is provided with respect to the rolling roll (1a), and one side support plate (71) is provided at the tip of the non-rotating abrasive grain pushing device (4). And providing an elastic body function to the one side support plate, and attaching an abrasive grain layer 72 to one surface thereof. 4. The on-line roll grinding facility according to claim 3, wherein the non-rotating abrasive grain layer (72) is made of ultra abrasive grain made of diamond or cubic boron nitride. 4. The on-line roll grinding machine according to claim 3, wherein a control means for controlling the pushing force of the pushing device which can move the non-rotating abrasive grain layer (72) forward and backward with respect to the rolling roll (1a) is provided. 4. The nonrotating abrasive grain layer 72 according to claim 3, wherein the nonrotating abrasive grain layer 72 is disposed on one side of the rotary grindstone 20 in the roll axis direction, and the nonrotating abrasive grain layer 72 is moved in the roll axis direction when the rotary grindstone moves while grinding. And the non-rotating abrasive grain layer (72) is pushed to the surface of the rolled roll only when it moves to the opposite side on which the roll is placed. 4. The on-line roll grinding facility according to claim 3, wherein the non-rotating abrasive grain layer (72) is controlled so as to push only the portion through which the rolling material on the rolling roll surface passes to the rolling roll surface. The rolling rolls are ground on-line by the grinding means 5 provided with the rotatable rotary grindstone 20 for grinding the rolling rolls 1a on-line, and thereafter, grinding grains are formed in the substantially circumferential direction of the rolling rolls. The on-line roll grinding method of adjusting the surface roughness of a rolling roll. A rotating grindstone 20 mounted so as to face the rolling roll 1a, a grindstone driving device 22 for rotationally driving the rotating grindstone, and a pushing device 23 for pushing the rotating grindstone against the rolling roll. In the on-line roll grinding equipment which has the grindstone apparatus 5 provided with the provision of the traverse apparatus 24 which moves this grindstone apparatus to a rolling roll axis direction, To grind the grindstone having the non-rotating abrasive grain layer 72 in the grindstone device and remove the wear step of the rolled roll, the grindstone is ground using the grindstone to adjust the roughness of the surface of the rolled roll to a desired roughness. The on-line roll grinding method which pushes a non-rotating abrasive grain layer to this rolling roll, and grinds for grinding. Grinding means 5 provided with the rotatable rotary grindstone 20 which grinds the rolling roll 1a on-line, and the roughness adjustment means 7 which can adjust the surface roughness of this rolling roll, It characterized by the above-mentioned. equipment. Grinding this rolling roll on-line by the grinding means 5 provided with the rotatable rotary grindstone 20 which grinds the rolling roll 1a on-line, and then grinds in the substantially circumferential direction of this rolling roll, Rolling method adjusting the surface roughness of a rolling roll, The rolling method characterized by the above-mentioned.