JP2022144190A - Grinding wheel modifying device and method - Google Patents

Abstract

To provide a grinding wheel modifying device and method capable of suppressing the occurrence of chatter shape on a circumferential face of a grinding wheel.SOLUTION: A grinding wheel modifying device 10 includes a modification tool T which is supported so as to permit rotative driving and is relatively moved in a rotative axis direction of a grinding wheel G which is rotatively driven and, thereby, modifies a circumferential face of the grinding wheel, and a control device CR which controls rotational frequency of the grinding wheel and controls relative movement of the modifying tool and the grinding wheel. The control device relatively moves the modifying tool and the grinding wheel while changing the rotational frequency of the grinding wheel and, thereby, performs rough modification of the circumferential face of the grinding wheel by means of the modifying tool. Further, the control device relatively moves the modifying tool and the grinding wheel while keeping rotative frequency of the grinding wheel constant and, thereby, performs precise modification of the circumferential face of the grinding wheel with the modifying tool.SELECTED DRAWING: Figure 3

Description

The present invention relates to a grinding wheel correction apparatus and method.

A grinding wheel of a grinding machine is corrected, that is, trued and dressed, in a grinding wheel correcting device. Grinding wheel correction devices include vertical grinding wheel correction devices that include a cup-shaped correction tool having an axis of rotation arranged perpendicular to the axis of rotation of the grinding wheel shaft of the grinding wheel. Further, there is a horizontal grinding wheel correcting device provided with a disk-shaped correcting tool having a rotation axis arranged parallel to the rotation axis of the grinding wheel spindle of the grinding wheel. The correction tool has diamond electrodeposited on its peripheral surface, and corrects the peripheral surface of the rotating grinding wheel on the peripheral surface of the rotating correction tool.

In such a grinding wheel repairing apparatus, chattering may occur on the peripheral surface of the grinding wheel after repairing the grinding wheel. If grinding is performed with a grinding wheel having such a chattering shape, there is a possibility that the roundness or straightness of the workpiece may be defective. In the past, this was handled by exchanging the correction tool and the correction tool shaft, but this was costly. In addition, although correction conditions are changed (reduction of depth of cut, number of corrections, etc.), it is difficult and time-consuming to find correction conditions.

On the other hand, in Patent Documents 1 and 2, the grinding wheel is corrected by changing the relative rotation speed around the rotation speed at which the relative rotation speed of the correction tool and the grinding wheel is constant. A grinding wheel correcting device capable of suppressing the occurrence of chattering on the peripheral surface of the grinding wheel is described. According to this grinding wheel correction device, there is no need to replace the correction tool or the correction tool shaft as in the past, so the cost can be reduced, and it is necessary to change the correction conditions (reduce the depth of cut, reduce the number of corrections, etc.). Since there is no

JP-A-64-64777 JP 2008-149440 A

However, when the inventor of the present application modified the grinding wheel by varying the relative rotational speed of the correction tool and the grinding wheel, there were still cases where chattering occurred on the peripheral surface of the grinding wheel. The reason for this is that, in the case of a vertical grinding wheel correction device, resonance occurs when the natural frequency of the correction tool in the rotation axis direction becomes an integral multiple of the rotation frequency (rotational speed) of the grinding wheel. It was found that it occurred on the peripheral surface of the car and became a chattering shape. In addition, in the case of a grinding wheel correction device for a horizontal grinding wheel, resonance occurs when the natural frequency of the correcting tool in the direction perpendicular to the rotation axis of the correction tool becomes an integral multiple of the rotation frequency (rotational speed) of the grinding wheel. was found to occur on the peripheral surface of the grinding wheel, resulting in a chattering shape.

In order to suppress the chattering of the peripheral surface of the grinding wheel, the rotation frequency of the grinding wheel should be set so that the natural frequency of the correcting tool does not become an integer multiple of the rotation frequency of the grinding wheel. However, since the rotating shaft of the correction tool is supported by rolling bearings, the natural frequency of the correction tool changes due to wear of the rolling elements, inner and outer rings, deterioration of lubricating oil, and the like. If this change occurs, there is a risk that the set rotational frequency of the grinding wheel will not be able to suppress the occurrence of chattering on the peripheral surface of the grinding wheel.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a grinding wheel repairing apparatus and method capable of suppressing chattering of the peripheral surface of the grinding wheel.

A grinding wheel repairing device according to the present invention comprises a repairing tool that is rotatably supported and relatively moves in the rotational axis direction of the grinding wheel to repair the peripheral surface of the grinding wheel; A grinding wheel correcting apparatus comprising a control device for controlling a rotation frequency and for controlling relative movement of the correction tool and the grinding wheel, wherein the control device controls the rotation frequency of the grinding wheel while varying the rotation frequency of the grinding wheel. By relatively moving the correction tool and the grinding wheel, the correction tool roughly corrects the peripheral surface of the grinding wheel, and the correction tool and the grinding wheel are moved relative to each other while the rotation frequency of the grinding wheel is kept constant. By moving the correction tool, the peripheral surface of the grinding wheel is finely corrected.

In this grinding wheel correction device, first, coarse correction is performed while varying the rotational frequency of the grinding wheel, so the number of crests that form chattering shapes is not constant, and the crests are formed while shifting. Next, fine correction is performed while the rotation frequency of the grinding wheel is kept constant, so that most of the peaks remaining after rough correction can be removed. Therefore, it is possible to suppress the occurrence of chattering on the peripheral surface of the grinding wheel.

A grinding wheel repairing method according to the present invention is a grinding wheel repairing method for repairing the circumferential surface of a rotatably driven grinding wheel with a rotatably driven repairing tool, wherein the repairing tool and the grinding wheel are adjusted while varying the rotational frequency of the grinding wheel. a rough correction step of roughly correcting the circumferential surface of the grinding wheel with the correction tool by moving the grinding wheel relative to each other; and a fine correction step of finely correcting the circumferential surface of the grinding wheel with the correction tool by moving the correction tool. This provides an effect similar to that of a grinding wheel correction device.

It is a top view which shows the grinding-processing apparatus with which a grinding wheel correction apparatus is applied. It is a partial cross-sectional view showing a grinding wheel correction device, a grinding wheel head, and a control device. FIG. 10 is a diagram showing the relationship between the grinding wheel rotation frequency and the elapsed time during the grinding wheel correcting operation; FIG. 10 is a diagram showing a state in which the correction tool and the grinding wheel are positioned at the correction start position in one pass of the grinding wheel correction operation; FIG. 10 is a diagram showing a state in which the grinding wheel has been completely repaired with a repair tool in one pass of the grinding wheel repair operation. FIG. 4 is a diagram showing a state in which the grinding wheel is moved in the X-axis direction with respect to the correction tool in one pass of the grinding wheel correction operation; FIG. 10 is a diagram showing a state in which the correction tool is moved in the Z-axis direction with respect to the grinding wheel in one pass of the grinding wheel correction operation; 4 is a flow chart showing the first half of control processing of the grinding wheel correction device in the grinding apparatus. 4 is a flow chart showing the latter half of the control process of the grinding wheel correction device in the grinding apparatus.

(1. Configuration of Grinding Device 1)
The grinding wheel correcting device of this embodiment is provided in, for example, a grinding device for cylindrical grinding. As shown in FIG. 1, the grinding apparatus 1 includes a bed 2 constituting a base portion, a wheel table 3 placed on the bed 2 and supporting a grinding wheel G so as to be rotatable, and the wheel table 3 arranged in an X direction. An X-axis driving device 4 for moving in the axial direction and a work table 5 placed on the bed 2 at a position different from the wheel head 3 are provided.

Further, a headstock 7 and a tailstock 8 which are mounted on a work table 5 to support the work W and have a main shaft 6 for rotating the work W, and a Z-axis driving device for moving the work table 5 in the Z-axis direction. 9, a grinding wheel correction device 10 which is provided on the headstock 7 and rotatably supports a correction tool T for correcting the grinding wheel G, and a control device CR. The X-axis driving device 4 and the Z-axis driving device 9 are known driving devices each using a servomotor, a feed screw, and the like.

The grinding wheel head 3 includes a grinding wheel shaft GA on which a grinding wheel G is mounted, and a grinding wheel shaft driving device GM including a motor or the like for rotating the grinding wheel shaft GA. Grinding wheel G is formed in a disc shape using an appropriate grinding wheel material such as a CBN grinding wheel so that the outer peripheral surface and the end surface in the vicinity of the outer peripheral surface serve as grinding surfaces. be done. The headstock 7 includes a spindle drive device 16 including a motor or the like for rotating the spindle 6 .

The grinding wheel correcting device 10, which will be described later in detail, comprises a correcting tool shaft TA on which a correcting tool T is mounted, and a correcting tool shaft drive device TM comprising a built-in motor or the like for rotating the correcting tool shaft TA. . The correction tool T is formed in a cup shape with a diamond electrodeposited on its outer peripheral surface, and is rotationally driven together with a correction tool shaft TA by a correction tool shaft driving device TM.

The control device CR drives and controls the X-axis driving device 4 to move the wheelhead 3 in the X-axis direction, and drives and controls the Z-axis driving device 9 to move the work table 5 in the Z-axis direction. In addition, the main shaft driving device 16 is driven and controlled to rotate the workpiece W, the grinding wheel shaft driving device GM is driven and controlled to rotate the grinding wheel G, and the correction tool shaft driving device TM is driven and controlled to rotate the correcting tool T. Let

(2. Detailed Configuration of Grinding Wheel Correcting Device 10)
As shown in FIG. 2, the grinding wheel correcting device 10 includes a correcting tool T, a correcting tool shaft TA, a correcting tool shaft drive device TM, a housing TH, bearings TB1 and TB2, and the like. This grinding wheel correction device 10 is a vertical grinding wheel correction device provided with a cup-shaped correction tool T having a rotation axis TL arranged perpendicular to the rotation axis GL of the grinding wheel shaft GA of the grinding wheel G. A diamond D is electrodeposited on the outer peripheral surface of the correction tool T, and a coaxial and substantially cylindrical correction tool shaft TA is attached to one end surface side. The correcting tool shaft driving device TM rotates the correcting tool T together with the correcting tool shaft TA, and corrects the surface condition of the outer peripheral surface of the grinding wheel G with the outer peripheral surface of the correcting tool T, that is, performs at least one of truing and dressing.

Here, truing is a work of reshaping, and when the grinding wheel G is worn by grinding, it is a work of shaping the grinding wheel G according to the shape of the workpiece W, and a work of removing the runout of the grinding wheel G due to uneven wear. etc. Dressing is a dressing (sharpening) work, and is a work of adjusting the protrusion amount of abrasive grains and creating a cutting edge of abrasive grains. Dressing is an operation for correcting blindness, clogging, spillage, etc., and is usually performed after truing. Also, truing and dressing may be performed without any particular distinction.

The housing TH includes a disk-shaped housing cap 11 , a cylindrical first housing 12 and a cylindrical second housing 13 . A housing cap 11 is attached to the front end of the first housing 12 . The second housing 13 is attached to the rear end of the first housing 12 . The housing cap 11 and the housings 12 and 13 are integrally connected and fixed by bolts or the like.

The correction tool axis TA is arranged within the housing TH so as to be rotatable about the rotation axis TL with respect to the housing TH. A bearing TB1 is arranged on the housing cap 11 side of the correction tool axis TA. The inner peripheral surface of the inner ring of the bearing TB1 is supported by the outer peripheral surface of the correction tool shaft TA, and the outer peripheral surface of the outer ring of the bearing TB1 is supported by the inner peripheral surface of the first housing 12 . Thereby, the housing cap 11 side of the correction tool shaft TA is rotatably supported by the housing TH via the bearing TB1. The bearing TB1 is a rolling bearing, and is a known parallel combination type angular contact ball bearing. Lubricating oil is supplied to the bearing TB1 through an oil passage (not shown) provided in the housing TH. However, the bearing TB1 may be another type of bearing depending on the conditions of use.

A bearing TB2 is arranged on the second housing 13 side of the correction tool axis TA. The inner peripheral surface of the inner ring of the bearing TB2 is supported by the outer peripheral surface of the correction tool shaft TA, and the outer peripheral surface of the outer ring of the bearing TB2 is supported by the inner peripheral surface of the second housing 13 . As a result, the second housing 13 side of the correction tool axis TA is rotatably supported by the housing TH via the bearing TB2. Bearing TB2 is a rolling bearing and is a known cylindrical roller bearing. Lubricating oil is supplied to the bearing TB2 through an oil passage (not shown) provided in the housing TH. However, the bearing TB2 may be another type of bearing depending on the conditions of use.

Between the bearing TB1 and the bearing TB2 on the correcting tool shaft TA, the inner peripheral surface of the rotor 14 constituting the correcting tool shaft driving device TM is fixed. A stator 15 that constitutes the correction tool shaft drive device TM is arranged on the outer peripheral surface side of the rotor 14 . Specifically, the outer peripheral surface of the stator 15 is fixed to the inner peripheral surface of the second housing 13 so that the inner peripheral surface of the stator 15 has a predetermined gap from the outer peripheral surface of the rotor 14 . As a result, the correcting tool shaft TA is rotationally driven together with the correcting tool T by driving the correcting tool shaft driving device TM controlled by the control device CR.

(3. Whetstone correction operation)
Next, the whetstone correcting operation will be described. As described in the problem to be solved by the invention, when the inventor of the present application modified the grinding wheel G by varying the relative rotational speed between the repair tool T and the grinding wheel G, the chattering shape of the outer peripheral surface of the grinding wheel G still occurred. could have occurred. The reason for this is that when the natural frequency of the correction tool T in the direction of the rotation axis TL becomes an integer multiple of the rotation frequency (rotational speed) of the grinding wheel G, resonance occurs. It was found that it occurred and became a chattering shape.

In order to suppress the occurrence of chattering on the outer peripheral surface of the grinding wheel G, the rotation frequency of the grinding wheel G should be set so that the natural frequency of the correction tool T does not become an integral multiple of the rotation frequency of the grinding wheel G. . However, since the correcting tool shaft TA of the correcting tool T is supported by the bearing TB1, the natural frequency of the correcting tool T changes due to wear of the rolling elements, inner ring, outer ring, etc., deterioration of lubricating oil, and the like. If this change occurs, there is a risk that the set rotational frequency of the grinding wheel G will not be able to suppress the occurrence of chattering on the outer peripheral surface of the grinding wheel G.

Therefore, first, by moving the correction tool T in the direction of the rotation axis of the grinding wheel G while varying the rotation frequency of the grinding wheel G, the outer peripheral surface of the grinding wheel G is roughly corrected by the correction tool T. At this time, the rotation frequency of the grinding wheel G is varied so that the number of crests forming a chattering shape is not constant, for example, by one crest. Then, one cycle when the rotation frequency of the grinding wheel G is varied is set to be different from one cycle of rough correction performed on the outer peripheral surface of the grinding wheel G by the correction tool T.

Specifically, the rotation frequency V of the grinding wheel G is represented by the quotient obtained by dividing the natural frequency of the correction tool T by the number of ridges forming the chattering shape. Therefore, as shown in FIG. 3, the rotation frequency (first grinding wheel rotation frequency) V1 of the grinding wheel G at which the number of ridges is n (integer) (in this example, when the workpiece W is ground by the grinding wheel G ) and the rotation frequency (second grinding wheel rotation frequency) V2 of the grinding wheel G at which the number of peaks is n (integer)-1.

Then, the rotation frequency V of the grinding wheel G is varied between the first grinding wheel rotation frequency V1 and the second grinding wheel rotation frequency V2 of the grinding wheel G. In FIG. 3, the frequency is linearly varied from the first grinding wheel rotation frequency V1 to the second grinding wheel rotation frequency V2, and linearly varied from the second grinding wheel rotation frequency V2 to the first grinding wheel rotation frequency V1. As a result, the number of ridges forming a chattering shape is not formed uniformly, and the ridges are formed while shifting. In particular, the greater the number of fluctuations, the more effective.

Further, as shown in FIGS. 4A to 4D, one cycle (one pass) of rough correction performed on the peripheral surface of the grinding wheel G by the correction tool T means that the grinding wheel G and the correction tool T are positioned at the correction start position. (state of FIG. 4A), the outer peripheral surface of the grinding wheel G is corrected by the correction tool T (state of FIG. 4B), and then the grinding wheel G and the correction tool T are again positioned at the correction start position (FIG. 4B). 4C, the state of FIG. 4D) (tp in FIG. 3). Further, one period when the rotation frequency of the grinding wheel G is changed means that the grinding wheel G reaches the second grinding wheel rotation frequency V2 from the first grinding wheel rotation frequency V1, and the second grinding wheel rotation frequency V2 reaches the first grinding wheel rotation frequency V2. It means the time (tv in FIG. 3) until the grinding wheel rotation frequency V1 is reached.

When one cycle (tv) when changing the rotation frequency of the grinding wheel G is synchronized with one cycle (one pass tp) of rough correction performed on the peripheral surface of the grinding wheel G by the correction tool T, chattering occurs. However, if the one period (tv, tp) is made different, the occurrence of chattering can be further suppressed. Note that the repetition cycle of rough correction is 14 passes in this example.

Next, by moving the correction tool T in the direction of the rotation axis of the grinding wheel G while keeping the rotation frequency of the grinding wheel G constant, the peripheral surface of the grinding wheel G is finely corrected by the correction tool T. The reason for this fine correction is as follows. The rotation frequency of the grinding wheel G is varied in the rough correction, but at this time, the rotation center of the grinding wheel G changes due to the unbalance of the grinding wheel G, and chattering may occur on the outer peripheral surface of the grinding wheel G. . Therefore, precise correction is performed at the rotation frequency of the grinding wheel G when the work W is actually ground to remove the chattering shape.

Specifically, as shown in FIG. 3, the rotation frequency V of the grinding wheel G in fine correction is the rotation frequency when the workpiece W is ground by the grinding wheel G, which is the first grinding wheel rotation frequency V1 in this example. Maintain constant speed. As a result, most of the peaks remaining after the rough correction can be removed, thereby suppressing the occurrence of chattering. However, at the first grinding wheel rotation frequency V1, the number of crests that form a chattering shape is n (integer), so if fine correction is performed for a long time, the peripheral surface of the grinding wheel G will have a chattering shape. Therefore, the repetition cycle of fine correction (two passes in this example) is performed until the outer peripheral surface of the grinding wheel G attains the state required when grinding the workpiece W with the grinding wheel G determined in advance.

(4. Control processing of the grinding wheel correction device 10 in the grinding device 1)
Next, control processing (grinding wheel correction method) of the grinding wheel correction device 10 in the grinding apparatus 1 will be described with reference to the flowcharts of FIGS. 5A and 5B. The control device CR of the grinding wheel correction device 10 sets the first grinding wheel rotation frequency V1 and the second grinding wheel rotation frequency V2 of the grinding wheel G (step S1 in FIG. 5A).

Specifically, when the quotient obtained by dividing the natural frequency of the correcting tool axis TA of the correcting tool T by the rotation frequency when the work W is ground by the grinding wheel G is an integer, the control device CR The rotation frequency when grinding the workpiece W with the grinding wheel G is set as the first grinding wheel rotation frequency V1. Then, the rotational frequency of the grinding wheel G is obtained by dividing the natural frequency of the correction tool shaft TA of the correction tool T by an integer smaller than the quotient, and the obtained rotational frequency of the grinding wheel G is calculated as the second grinding wheel. It is set as the rotation frequency V2.

The control device CR drives the grinding wheel shaft driving device GM and the correction tool shaft driving device TM to start rotating the grinding wheel G and the correction tool T (step S2 in FIG. 5A). Then, the grinding wheel G is cyclically varied between the first grinding wheel rotation frequency V1 and the second grinding wheel rotation frequency V2 (step S3 in FIG. 5A).

Specifically, the control device CR controls one cycle of changing the rotation frequency of the grinding wheel G so as not to synchronize with one cycle of rough correction performed on the outer peripheral surface of the grinding wheel G by the correction tool T as a time constant. to set. That is, the time for one pass of rough correction linearly extends from the first grinding wheel rotation frequency V1 to the second grinding wheel rotation frequency V2, and linearly from the second grinding wheel rotation frequency V2 to the first grinding wheel rotation frequency V1. Set it to be different from the time to return to. Then, the rotation frequency of the grinding wheel G is periodically varied with the set time constant.

The control device CR drives the X-axis driving device 4 to move the grinding wheel head 3 in the X-axis direction, and drives the Z-axis driving device 9 to move the grinding wheel correction device 10 together with the work table 5 in the Z-axis direction. , the grinding wheel G and the correction tool T are positioned at the correction start position (step S4 in FIG. 5A, rough correction step). Then, for example, when the rotational frequency of the grinding wheel G reaches the first grinding wheel rotational frequency V1, rough correction is started (step S5 in FIG. 5A, rough correction step). Then, the rough correction is repeated until the predetermined number of rough correction passes is completed (step S6 in FIG. 5A, rough correction step). While returning to the wheel rotation frequency V1, the grinding wheel G and the correction tool T are moved to the correction start position (step S7 in FIG. 5A, fine correction step).

The control device CR sets the rotation frequency of the grinding wheel G so as to maintain it at the first grinding wheel rotation frequency V1 (step S8 in FIG. 5B, precision correction step). Then, at the same time when the grinding wheel G and the correction tool T are positioned at the correction start position, the fine correction is started (step S9 in FIG. 5B, fine correction step), and the fine correction is completed until the fine correction is completed for the predetermined number of passes set in advance. is repeated (step S10 in FIG. 5B, precise correction step). When the fine correction is completed for a predetermined number of passes, the grinding wheel G is moved to the retracted position (step S11 in FIG. 5B), the rotation of the grinding wheel G and the correction tool T is stopped (step S12 in FIG. 5B), and all processing is completed. finish.

(5. Others)
In the above-described embodiment, the rotation frequency of the grinding wheel G is changed so as to shift the number of crests of the chatter shape by one crest during rough correction. However, it is not limited to this, and may be shifted by an arbitrary number of mountains. One pass of rough correction linearly varies from the first grinding wheel rotation frequency V1 to the second grinding wheel rotation frequency V2, and linearly varies from the second grinding wheel rotation frequency V2 to the first grinding wheel rotation frequency V1. explained when to do so. However, it is not limited to this, and for example, it may be changed in a zigzag manner or in a curved line.

Moreover, although the case where multiple passes are performed in the rough correction has been described, the rough correction may be completed in one pass. Also, the description has been given of the case where one cycle of varying the rotation frequency of the grinding wheel G is not synchronized with one cycle of the rough correction performed on the peripheral surface of the grinding wheel G by the correction tool T. If removal is possible, it may be synchronized.

Further, although the vertical grinding wheel repairing device has been described as an example of the grinding wheel repairing device 10, a horizontal grinding wheel repairing device can also be applied in the same manner. In addition, although the cylindrical grinding device was described as an example of the grinding device 1 to which the grinding wheel correcting device 10 is applied, an internal grinding device, a centerless grinding device, and a surface grinding device can be similarly applied.

1; Grinding device, 3; Grinding wheel head, 10; Grinding wheel correcting device, G; Grinding wheel, GA; Grinding wheel shaft, GM; Shaft drive device, CR; control device, TB1, TB2; bearing

Claims (6)

a correction tool that is rotatably supported and relatively moves in the rotational axis direction of the rotatably driven grinding wheel to correct the peripheral surface of the grinding wheel;
a control device that controls the rotation frequency of the grinding wheel and controls the relative movement of the correction tool and the grinding wheel;
A grinding wheel correction device comprising:
The control device relatively moves the correction tool and the grinding wheel while varying the rotational frequency of the grinding wheel, thereby performing rough correction of the peripheral surface of the grinding wheel with the correction tool, and rotating the grinding wheel. A grinding wheel correcting device for performing precise correction of the circumferential surface of the grinding wheel with the correcting tool by relatively moving the correcting tool and the grinding wheel while maintaining a constant frequency. When the quotient obtained by dividing the natural frequency of the correction tool shaft of the correction tool by the rotation frequency (referred to as the first grinding wheel rotation frequency) when grinding the workpiece with the grinding wheel is an integer, the control device , the natural frequency is divided by an integer smaller than the quotient to obtain the rotation frequency of the grinding wheel (referred to as the second grinding wheel rotation frequency), and the rotation frequency of the grinding wheel is divided between the first grinding wheel rotation frequency and the second grinding wheel rotation frequency. 2. The grinding wheel correction device according to claim 1, wherein said rough correction is performed while varying between two grinding wheel rotation frequencies. 3. The grinding wheel correction device according to claim 2, wherein said control device performs said fine correction while maintaining said first grinding wheel rotation frequency. The control device performs the rough correction by controlling one period of the rough correction performed on the peripheral surface of the grinding wheel by the correction tool and one period when the rotational frequency of the grinding wheel is varied to be different. A grinding wheel correction device according to any one of claims 1-3, wherein A grinding wheel correction device according to any one of claims 1 to 4, wherein a correction tool shaft of said correction tool is rotatably supported by a rolling bearing. A grinding wheel correction method for correcting the peripheral surface of a rotary-driven grinding wheel with a rotary-driven correction tool, comprising:
a rough correction step of performing rough correction of the peripheral surface of the grinding wheel with the correction tool by relatively moving the correction tool and the grinding wheel while varying the rotation frequency of the grinding wheel;
a fine correction step of performing fine correction of the peripheral surface of the grinding wheel with the correction tool by relatively moving the correction tool and the grinding wheel while maintaining the rotation frequency of the grinding wheel constant;
A grinding wheel correction method comprising:

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