JPH11197722A - On-line roll grinding method and its device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an on-line roll grinding method and its device which elongates the period of roll exchange by detecting surface flaws and internal defects in a rolling roll generating during a rolling operation with a rolling roll defect detector traversable in the axial direction of the rolling roll, repairing detected defective parts by operating a rotary grinding stone of a traversable on-line roll grinding device during on-line and preventing roll troubles from generating. SOLUTION: Surface flaws and internal defects in the rolling roll 23 are detected with the rolling roll defect detector 26 while traversing in the axial direction of the rolling roll 23 the rolling roll grinding device 25 of a traversing mechanism capable of transferring the rotary grinding stone 24 in the axial direction of the rolling roll 23 and the rolling roll defect detector 26 which is traversable in the axial direction of the rolling roll. When the defective parts are detected, the rolling roll is ground with the rotary grinding stone based on a command from a commanding device which outputs a grinding command calculated with an arithmetic unit and repaired during on-line.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an online roll grinding method and apparatus for detecting surface defects and internal defects of a rolling roll of a rolling mill during rolling and repairing the defective portion during rolling.

[0002]

2. Description of the Related Art Rolls of rolling mills (particularly work rolls)
The rolling portion that comes into contact with the rolled material during the rolling operation, due to high temperature and uneven temperature distribution and repeated high rolling load,
There is a problem that a step is generated between the non-rolled portion and the roll profile of the work roll is changed. Therefore, conventionally, the influence of the step is avoided by sequentially rolling from a wide rolled material to a narrow rolled material, but this has a problem that a rolling schedule is limited. Also,
Due to the above-mentioned causes, uneven load, etc., surface scratches and internal defects of the rolling rolls are suddenly generated online, causing roll troubles, and there is a problem that the rolling line may be stopped for a long time.

In order to solve the above problems, Japanese Patent Application Laid-Open Nos. Hei 6-285517 and Hei 6-285517 have been proposed.
No. 63616, and the like. For example, JP-A-6-2855
No. 17, "roll grinding method", as shown in FIG.
The rotation axis O of the cup-shaped grindstone 1 is offset from the axis of the roll 2 by a predetermined amount e, the front surface of the cup-shaped grindstone 1 is pressed against the roll 2, and the cup-shaped grindstone 1 is reciprocated in the axial direction of the roll 2. I have. If the roll diameter changes in this state, the roll surface is ground by adjusting the offset amount e of the cup-type grindstone 1.

Further, the "rolling machine equipped with an online roll grinder" disclosed in JP-A-6-63616 has an elastic body function with the disk grindstone 6a of the rotary grindstone portion 6 of the online roll grinder 5, as shown in FIG. Thin disk 6b
And the rolling of the rolling roll 7 by the bending of the thin disk 6b.
Absorb the vibration of The load cell 9 for measuring the thrust force acting on the grindstone rotating shaft 8, the displacement detector 10 for measuring the amount of deflection of the thin disk 6b, and the grindstone feeder 11 are moved together with the rotating grindstone unit 6 in the roll axis direction to generate on the grindstone rotating shaft. The roll profile is determined from the change in the thrust force or the amount of deflection of the thin disk.

[0005]

SUMMARY OF THE INVENTION The above-mentioned JP-A-6-2
In the grinding method of No. 85517 (FIG. 7), when the offset is performed, the abrasive grains are severely worn, so that the abrasive grain plane of the ground surface is not uniformly reduced. As a result, there has been a problem that partial abnormal wear occurs. In addition, this grinding method does not include a roll defect detector for detecting a surface defect caused by surface roughening or cracks generated on the outer periphery of the roll and a defect such as a void portion generated inside the roll. Is grinding.
As described above, since it is not possible to detect a roll surface flaw or an internal defect on-line, there has been a problem that a sudden roll trouble such as roll breakage or damage to a rolled material surface occurs.

On the other hand, in the rolling mill disclosed in JP-A-6-63616 (FIG. 8), if the roll profile calculation is performed by detecting the displacement of the thin disk, there is a problem that the accuracy is not high. Also,
Even with this method, it is not possible to detect roll surface scratches and internal defects online, causing sudden roll troubles such as roll breakage and damage to the rolled material surface, and reducing the frequency of roll changes other than roll surface wear. There were also problems that did not occur.

The present invention has been made to solve the various problems described above. That is, an object of the present invention is to detect surface scratches and internal defects of a rolling roll generated during a rolling operation, and to repair the detected defective portion online, thereby preventing the occurrence of roll trouble. Another object of the present invention is to provide an on-line roll grinding method and apparatus capable of prolonging the roll exchange cycle by preventing the above.

[0008]

According to the present invention, there is provided a rolling roll grinding apparatus having a traverse mechanism capable of moving a rotating grindstone in the axial direction of a rolling roll, and detecting a roll defect capable of traversing the rolling roll in the axial direction. While traversing the mill in the axial direction of the mill roll, the roll roll defect detector detects surface scratches and internal defects of the mill roll, and outputs a grinding command calculated by an arithmetic unit when a defect is detected. , An on-line roll grinding method is characterized in that, based on a command from the above, repair is performed on-line by grinding with a rotary grindstone.

According to the method of the present invention described above, the rotating grindstone can be moved in the axial direction of the rolling roll at a predetermined angle to each of the upper and lower rolling (work) rolls with the rolled material interposed from the upstream side in the rolling mill. Roll mill with a traverse mechanism,
A rolling roll defect detector capable of traversing in the axial direction of the rolling roll is arranged, and while traversing in the axial direction of the rolling roll, the roll roll defect detector detects surface scratches and internal defects of the rolling roll, and detects defective portions. Is detected, the grinding command calculated by the arithmetic unit is output, and the grinding wheel is ground based on the command from the commander, and the repair is performed online, so that the defective portion of the roll can be detected early and in the initial state. Discover and understand. Therefore, before the defect is enlarged, the grindstone is ground with a rotary grindstone based on a grinding command from a commander, and repair is performed on-line in the rolling line to prevent roll breakage and rolled material damage. In addition, the work roll is removed, and the roll replacement cycle for off-line repair outside the rolling line is greatly extended, thereby improving operability. Further, the productivity of the rolled material can be improved.

According to a preferred embodiment of the present invention, the traversing of the rolling roll grinding apparatus and the rolling roll defect detector in the axial direction of the rolling rolls is performed simultaneously or one of them. According to this method, the rolling grinder of the traverse mechanism capable of moving the rotating grindstone in the axial direction of the rolling roll and the rolling roll defect detector capable of traversing in the axial direction of the rolling roll are simultaneously operated, and the rolling is performed. If a defect is detected by the roll defect detector while traversing the roll in the axial direction, it can be repaired online with the rotating grindstone of the rolling roll grinding device based on a grinding command. Or, with the operation of the rotating grindstone of the rolling roll grinding device stopped, the roll roll defect detector is traversed in the axial direction of the work roll to perform detection for the presence and absence of a defective portion over the entire length of the work roll, and then The rotating grindstone of the rolling mill is operated based on the grinding command to perform online repair. Therefore, the operation can be selected according to the rolling schedule, and the productivity of the rolled material can be improved.

Further, according to the present invention, there is provided a rolling roll grinding device of a traverse mechanism capable of moving a rotating grindstone in the axial direction of a rolling roll, a rolling roll defect detector capable of traversing the rolling roll in the axial direction, and a rolling roll. An arithmetic device that calculates defect information from the defect detector, and a command device that outputs a grinding command calculated by the arithmetic device, including a rolling roll grinding device and a rolling roll defect detector, either simultaneously or either While operating to traverse in the axial direction of the rolling roll, the roll roll defect detector detects surface scratches and internal defects of the rolling roll, and outputs a grinding command calculated by an arithmetic unit when a defective portion is detected. The present invention provides an online roll grinding apparatus characterized in that grinding is performed with a rotary grindstone based on a command from the company and repair is performed online.

According to the configuration of the present invention, the rotating grindstone can be moved in the axial direction of the rolling roll at a predetermined angle with respect to each of the upper and lower work rolls with the rolled material interposed therebetween from the upstream side arranged in the housing of the rolling mill. Roll grinding device with a simple traverse mechanism, a roll roll defect detector capable of traversing in the axial direction of the roll, an arithmetic unit for calculating defect information from the roll roll defect detector, and a grinding command calculated by the arithmetic unit And a roll roll grinding device and a roll roll defect detector are operated simultaneously or one of them to traverse in the axial direction of the roll. And internal defects are detected, so the defect can be monitored and confirmed at all times, and if detected, via the command device that outputs the grinding command calculated by the arithmetic unit, Grinding and can be repaired in inline, as a result, it is possible to prevent breakage and damage of the rolled material in the roll. In addition, since a defective portion can be detected early and repaired online, the roll replacement cycle is greatly extended, and operability is improved.

[0013] Further, according to a preferred embodiment of the present invention, the rolling roll grinding apparatus comprises: a hydraulic motor that rotationally drives the rotating grindstone; a hydraulic cylinder that moves the rotating grindstone close to and away from the rolling roll; It comprises a traverse mechanism when moved in the axial direction of the roll, an actuator for pressing the rotating grindstone against the rolling roll, and another actuator for moving the angle of the rotating grindstone. According to this configuration, the rotating grindstone of the rolling roll grinding device can be brought into uniform contact with the outer peripheral surface of the body of the work roll. Further, when a defective portion is detected, it can be quickly traversed to the corresponding position and repaired online.

Further, the rolling roll defect detector is mounted and disposed in a case where the rolling grindstone is incorporated in a case where the rolling grindstone can move close to and away from the rolling roll and can be traversed as the rolling grindstone moves in the axial direction of the rolling roll. According to this configuration, the defect detector is mounted on the rolling roll so as to be able to approach and separate from the rolling roll on the built-in case of the rotary grindstone, so that the defect detector can be simply mounted. In addition, the number of detector components is reduced, so that the apparatus can be made compact.

According to another preferred embodiment of the present invention,
The rolling roll defect detector, a detector mounting stand arranged independently of the rolling roll grinding device, an actuator having a detector mounted on the detector mounting base so as to be able to approach and separate from the rolling roll, and a detector mounting base. A threaded rod that penetrates and is arranged in parallel with the axial direction of the rolling roll, a servomotor that is arranged at the end of the threaded rod and traverses the detector mount, and a position of the detector that is arranged at the other end of the threaded rod And traverses independently or in conjunction with the rotating grindstone in the axial direction of the rolling roll. In the case where the above-described case cannot be mounted on the built-in case of the rotating grindstone, even if it is separated and independent from the rolling roll grinding apparatus, the defective portion can be detected by traversing in a self-propelled manner in conjunction with the rotating grindstone or independently.

Further, the rolling roll defect detector is a non-contact eddy current displacement type. According to this configuration, since the defect detector adopts a non-contact eddy current displacement type, a defect such as a surface flaw of the work roll or a void close to the surface can be detected quickly and easily.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. In the drawings, common portions are denoted by the same reference numerals, and redundant description is omitted. 1 to 4 show a first embodiment of an online roll grinding apparatus according to the present invention. FIG. 1 is an overall configuration diagram of an online roll grinding apparatus according to the present invention. FIG.
FIG. 2 is a view taken along the line AA in FIG. 1. FIG. 3 is an enlarged plan view showing the carrier. FIG. 4 is a view taken in the direction of arrows BB in FIG.

In FIG. 1 and FIG. 2, an online roll grinding apparatus 20 of the present invention is disposed in a housing 21 of a rolling mill, and is vertically rolled (working) across a rolled material 22 from an upstream side.
A roll roller grinding device 25 of a traverse mechanism capable of moving the rotating grindstone 24 in the axial direction of the rolling roll at a predetermined angle (a lower online roll grinding device is omitted) for each of the rolls 23; A roll roll defect detector 26 that can be traversed, a calculation device 27 that calculates defect information from the roll roll defect detector 26, and a command device 28 that outputs a grinding command calculated by the calculation device 27;
The rolling roll defect detector 26 and the online roll grinding device 20 are traversed to detect a roll defective portion generated during the rolling operation, and can be repaired online by the rotating grindstone 24 based on a grinding command. Note that the online roll grinding includes both the rolling of the rolled material by the work rolls and the absence of the rolled material. In addition, the present invention can also be used for online grinding with a holding roll and an intermediate roll in addition to the work roll.

The applicant of the present application discloses a rolling roll grinding apparatus 25 disclosed in Japanese Patent Application No. 8-173633 (filing date: July 1996).
(Unpublished on March 3). That is, the rolling roll grinding device 25 includes a rotating grindstone 24 of a cup-type grindstone having an inclined contact surface 24a that comes into contact with the surface of the work roll 23 at the tip end, a rotating grindstone 24 attached thereto, and a pinion 30 near an intermediate portion. A rotating shaft 32 incorporated in a built-in case 31 formed and attached to a base plate 39, a hydraulic motor 34 that forms a pinion 33 that meshes with the pinion 30 and drives the rotating grindstone 24 to rotate, and the rotating grindstone 24
3, a hydraulic (hydraulic) cylinder 35 for moving toward and away from the outer peripheral portion, a traverse mechanism 36 for moving the rotary grindstone 24 in the axial direction of the work roll 23, and a servomotor 37 for pressing the rotary grindstone 24 against the work roll 23. And the rotating whetstone 2
And a hydraulic motor 38 for moving the angle 4.

Further, a hydraulic cylinder 35 (two in FIG. 2)
The work rolls 2 are mounted on a gantry 40 laid on a housing 21 of a rolling mill across a rolling line from the upstream side of a rolled material passing plate.
It is attached to extend freely toward 3. Further, a pair of left and right retract guides 41 (see FIG. 1) extending at a predetermined angle from the upstream side of the rolled material passing plate toward the work roll 23 are mounted inside the housing 21 of the rolling mill.

As shown in FIGS. 1 and 2, the traverse mechanism 36 is fitted to the retract guide 41 so as to be able to approach and separate from the work roll 23 and is parallel to the axis of the work roll 23. Extending guide beam 45
A rack gear 46 fixed to the upper surface of the center portion of the guide beam 45 in the front-rear direction and extending parallel to the axis of the work roll 23; and a guide arranged substantially parallel to both sides of the rack gear 46 and fixed to the guide beam 45. Rail 47
A moving block 48 which engages with the guide rail 47 and is movable along the guide rail 47;
8 and the work roll 2 attached to the guide beam 45
3, a plurality of (two in FIG. 2) carriers 49 movable in parallel to the axial direction, and a traverse hydraulic motor 51 having a pinion 50 mounted on the carrier 49 and engaged with the rack gear 46. , Hydraulic motor 5
1 drives the pinion 50, the carrier 49 is driven in accordance with the rotation direction of the pinion 50 with respect to the rack gear 46.
Can move along the guide rail 47 toward one end or the other end of the work roll 23 in the axial direction.

1 and 2, the guide beam 4
5 is connected to the tip of the piston rod 52 of the hydraulic cylinder 35, and the guide beam 45 and the carrier 49 are moved along the retract guide 41 by the pressurized oil and drained oil to the hydraulic cylinder 35, and You can approach and move away.

In FIG. 4, for grinding a defective portion,
The pressing of the rotating grindstone 24 against the work roll 23 is performed by the carrier 4.
9, a pressing frame 56 that moves along a guide rail (not shown) extending in a direction orthogonal to the axis of the work roll 23 and fixed to the upper surface near the tip of the pressing roller 56; This operation is performed with pressure oil and oil drainage.

Further, in FIGS. 3 and 4, a rotary shaft 32 having a rotary grindstone 24 at a tip portion is incorporated. The assembled case 31 is formed into a pressing frame 56 and a curved shape in which a tangent from one end to the other end on the upper surface of the pressing frame 56 changes from a state parallel to the axis of the work roll 23 to a direction crossing the axis of the work roll 23. Two linear guides 53,
The tilting hydraulic motor 38 mounted on the pressing frame 56
The base plate 3 attached above the linear guide 53 together with
9. Further, a tilting pinion 5 rotatably connected to an output shaft of the hydraulic motor 38 is provided on the base plate 39.
4 and a sector gear 55 meshing with the tilting pinion 54 are attached. With this configuration, the entire width of the contact surface 24a that forms the effective grinding surface of the rotating grindstone 24 can be brought into contact with a defective portion generated on the work roll 23 by tilting the rotating shaft 32 at a predetermined angle. As a result, efficient grinding can be performed.

As shown in FIG. 4, the rolling roll defect detector 26 is located at a position coinciding with the respective axes of the rotating grindstone 24 and the rotating shaft 32, and is located at the position of the built-in case 31 attached to the base plate 39. At the tip of the cylinder rod 61 of the hydraulic cylinder 60 fastened with bolts on the upper surface, it is mounted on the outer periphery of the work roll 23 so that it can be adjusted close to and separated from the outer circumference of the work roll 23 according to the outer diameter of the roll, and is easily attached. . Further, the rolling roll defect detector 26 includes the rotating grindstone 24 and the rotating shaft 3.
2 is disposed on the carrier 49 movable in parallel to the axial direction of the work roll 23 via the base plate 39, so that the work roll 23 is simultaneously moved with the rotation of the rotating grindstone 24. Can be traversed in parallel to the axial direction of. The roll roll defect detector 26 employs a non-contact type eddy current displacement meter 62 that can be sufficiently used even in an atmosphere such as high temperature and high humidity during the rolling operation, and makes the detector device compact. .

Therefore, during the rolling to the work roll 23 shown in FIG. 1, surface scratches X and internal defects Y suddenly generated due to thermal wear, uneven load, etc. can be detected quickly and accurately. Further, since a defective portion can be detected at an early stage, a roll trouble that occurs suddenly online can be prevented beforehand, and the roll life can be greatly extended. In addition, an apparatus or method for grinding a roll profile online has been conventionally implemented.However, a roll defect detector that detects a roll defect portion online and a rotary grindstone as in the present invention are used, and a defect is detected by the roll defect detector. No part was detected and the detected defective part was repaired with the rotary grindstone of the roll grinding device while online.

In FIG. 2, a roll defect detector 26 is shown.
Of defect information detected by the eddy current displacement meter 62 (defect position,
The type, shape, etc.) are input to the arithmetic unit 27. The grinding command calculated by calculating the information input to the arithmetic unit 27 is:
An operation signal is output from the command unit 28 to instruct the hydraulic motor 34 to rotate and rotate the grindstone 24 at a predetermined speed and angle to grind and repair the defective portion of the work roll 23 online. .

The on-line roll grinding method of the present invention will be described with reference to FIGS. As shown in these figures,
The upper work roll 2 is applied to the rolled material 22 from the upstream side in the rolling mill.
3, a rolling roll grinding device 25 of a traverse mechanism capable of moving the rotating grindstone 24 in the axial direction of the rolling roll 23 at a predetermined angle, and a surface scratch X and an internal surface of the working roll 23 which can be traversed in the axial direction of the rolling roll 23. The rolling roll defect detector 26 which employs a non-contact type eddy current displacement meter 62 for quickly and accurately detecting the defect Y is arranged, and
While operating the traverse simultaneously or one of the three in the axial direction, the roll roll defect detector detects the surface scratches and internal defects of the rolls, and when the defective portion is detected, the grinding command calculated by the arithmetic unit 27. Commander 28 that outputs
Is grinded by the rotary grindstone 24 based on the instruction from the maker, and repair is performed online.

By this operation, a defective portion of the roll can be detected early and in an initial state, and an abnormality can be found and grasped. Therefore, before the defective portion is enlarged, grinding is performed with a rotary grindstone based on a grinding command from a command device, and repair is performed on-line in a rolling line to prevent roll breakage and rolled material damage. In addition, the work roll is removed, and the roll replacement cycle for off-line repair outside the rolling line is greatly extended, thereby improving operability. Also, while simultaneously operating the rolling roll grinding device 25 and the rolling roll defect detector 26 and performing a traverse, if a defect is detected by the defect detector, the rotary grinding wheel 24 of the grinding device is online based on a grinding command based on a grinding command. Can be repaired. Or, with the operation of the rotary grindstone of the grinding device stopped, the rolling defect detector is traversed to detect a defective portion over the entire length of the work roll, and then the rotary grindstone is operated based on a grinding command to perform online repair. .

As a result, the operation can be selected according to the rolling schedule, and the productivity of the rolled material can be improved. Further, in a state where the operation of the rolling roll defect detector is stopped, the rotating grindstone of the rolling roll grinding device is operated to traverse in the axial direction of the work roll to perform predetermined grinding over the entire length of the work roll. After grinding, the rolling roll defect detector can be operated to traverse in the axial direction to detect the defective portion and the state of the roll profile at the same time.

FIGS. 5 and 6 show a second embodiment of the online roll grinding apparatus according to the present invention. FIG. 5 is an overall configuration diagram showing a second embodiment of the online roll grinding device according to the present invention. FIG. 6 is a view taken in the direction of the arrows CC in FIG. The rolling roll defect detector 70 includes a detector mounting base 71 that is disposed independently of the above-described rolling roll grinding device 25,
A hydraulic cylinder 60 in which a non-contact type eddy current displacement meter 62 forming a detector is mounted on a detector mounting base 71 so as to be able to approach and separate from the work roll 23, and an axial direction of the work roll 23 passing through the detector mounting base 71. A screw rod 72 arranged in parallel with
A servomotor 74 disposed at the end of the screw rod 72 and traversing the detector mount 71 via a driving gear 73
And the detection gear device 7 arranged at the other end of the screw rod 72.
5 and a position detector (for example, a pulse generator) 76 for detecting the position of the eddy current displacement meter 71.

Further, a guide rod 77 penetrates the detector mounting base 71 and is parallel to the screw rod 72 to smoothly guide the traverse of the detector mounting base 71 and prevent rotation. The defect detector 70 is built in a mounting frame 78 fixed to the retract guide 41 described above.
The work roll 23 can be traversed in the axial direction in conjunction with the rotating grindstone 24 or independently. When it is not possible to mount the rotating grindstone 24 on or near the built-in case 31 as described above, it is separated from the rolling roll grinding device in this way.
Even if it is made independent, it can be traversed in a self-propelled manner in conjunction with or independently of the rotating grindstone to detect a defective portion.

It should be noted that the present invention is not limited to the above-described embodiment, but can be variously changed without departing from the gist of the present invention.

[0034]

As described above, according to the on-line roll grinding method and apparatus of the present invention, the on-line roll grinding apparatus and the roll roll defect detector are provided to simultaneously or one of the roll rolls in the axial direction of the roll. Operates and traverses, constantly monitors and detects roll surface flaws and internal defects during rolling operation, and if a defect is detected, it can be repaired online with a rotating grindstone, detects the defect early and online Roll troubles that occur suddenly,
It has excellent effects such as extending the roll life and greatly extending the roll replacement cycle.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram of an online roll grinding device according to the present invention.

FIG. 2 is a view as viewed in the direction of arrows AA in FIG. 1;

FIG. 3 is an enlarged plan view showing a carrier.

FIG. 4 is a view taken in the direction of arrows BB in FIG. 3;

FIG. 5 shows a second embodiment of the online roll grinding apparatus according to the present invention.
1 is an overall configuration diagram showing an embodiment.

6 is a view taken in the direction of the arrows CC in FIG. 5;

FIG. 7 is a schematic view showing a conventional grinding method.

FIG. 8 is a schematic view showing a conventional grinding device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Cup-type grindstone 2 Roll 5 Online roll grinder 6 Rotating grindstone part 6a Disk grindstone 6b Thin disk 7 Rolling roll 8 Grinding wheel rotation axis 9 Load cell 10 Displacement detector 11 Grindstone feeder 20 Online roll grinder 21 Housing 22 Rolled material 23 Rolling ( Operation) Roll 24 Rotary grindstone 24a Contact surface 25 Rolling roll grinding device 26 Rolling roll defect detector 27 Computing device 28 Commander 30 Pinion 31 Assembly case 32 Rotating shaft 33 Pinion 34, 38 Hydraulic motor 35 Hydraulic (hydraulic) cylinder 37 Servo Motor 36 Traverse mechanism 39 Base plate 40 Mount 41 Retract guide 45 Guide beam 46 Rack gear 47 Guide rail 48 Moving block 49 Carrier 50 Pinion 51 Hydraulic motor 52 Piston rod 53 Linear Id 54 Tilting pinion 55 Sector gear 56 Press frame 60 Hydraulic cylinder 61 Cylinder rod 62 Eddy current displacement meter 70 Rolling roll defect detector 71 Detector mount 72 Screw bar 73 Driving gear unit 74 Servo motor 75 Detection gear unit 76 Position Detector (pulse generator) 77 Guide rod 78 Mounting frame O Shaft core e Predetermined amount X Surface scratch Y Internal defect

Claims (7)

[Claims] A rolling roll grinding device of a traverse mechanism capable of moving a rotating grindstone in the axial direction of a rolling roll, and a rolling roll defect detector capable of traversing the axial direction of the rolling roll, are traversed in the axial direction of the rolling roll. While detecting the surface scratches and internal defects of the rolling rolls with the roll roll defect detector, and based on the command from the command device that outputs the grinding command calculated by the arithmetic unit when the defective portion is detected, grinding with the rotary grinding wheel An online roll grinding method characterized by performing repairs during online. 2. The traverse in the axial direction of the rolling roll of the rolling roll grinding device and the rolling roll defect detector,
The online roll grinding method according to claim 1, wherein the method is performed simultaneously or by operating one of them. 3. A rolling roll grinding device of a traverse mechanism capable of moving a rotating grindstone in the axial direction of a rolling roll, a rolling roll defect detector capable of traversing the rolling roll in the axial direction, and a defect from the rolling roll defect detector. An arithmetic device for calculating information, and a command device for outputting a grinding command calculated by the arithmetic device, comprising: a rolling roll grinding device and a rolling roll defect detector, operating simultaneously or one of the rolling rolls. While traversing in the axial direction of the rolling roll, the roll roll defect detector detects surface scratches and internal defects of the rolling roll, and based on a command from a command device that outputs a grinding command calculated by an arithmetic unit when a defective portion is detected. An on-line roll grinding device, which grinds with a rotating grindstone and performs repairs online. 4. The rolling roll grinding device includes a hydraulic motor that drives the rotating grindstone to rotate, a hydraulic cylinder that moves the rotating grindstone close to and away from the rolling roll, and a traverse mechanism that moves the rotating grindstone in the axial direction of the rolling roll. The online roll grinding device according to claim 3, comprising: an actuator that presses the rotating grindstone against the rolling roll; and another actuator that moves the angle of the rotating grindstone. 5. The rolling roll defect detector is mounted and arranged in a built-in case of the rotating grindstone so as to be able to approach and separate from the rolling roll, and to be able to traverse with the movement of the rotating grindstone in the axial direction of the rolling roll. 4. The method according to claim 3, wherein
Or the online roll grinding device according to 4. 6. The rolling roll defect detector includes: a detector mounting base arranged independently of the rolling roll grinding device; an actuator having a detector mounted on the detector mounting base so as to be able to approach and separate from the rolling roll; A screw rod that penetrates the detector mounting base and is arranged in parallel with the axial direction of the rolling roll, a servomotor that is disposed at the end of the screw rod and traverses the detector mounting base, and is disposed at the other end of the screw rod 5. The online roll grinding apparatus according to claim 3, further comprising a position detector for detecting the position of the rolling detector, and interlocking with the rotating grindstone in the axial direction of the rolling roll or traversing alone. 7. The rolling roll defect detector is of a non-contact eddy current displacement type.
An online roll grinding device according to item 1.