JP2003340714A - Dressing method of grinding wheel - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a dressing method of a grinding wheel capable of dressing the grinding wheel having a circular arc part into a desired shape, and easily managing the abrasion of the grinding wheel and a dresser. <P>SOLUTION: A position DZ1 in the Z-axis direction of a center of rotation O of a rotary dresser 32 is detected when it is brought into contact with a right end face part 24 of the grinding wheel 18, the dressing abrasion DM of the rotary dresser 32 is calculated, and the present dresser diameter DD is calculated on the basis of the dressing abrasion DM and the dresser diameter DD before dressing. A position DX in the X-axis direction of the center of rotation O of the rotary dresser is detected when it is brought into contact with a linear outer peripheral part 20 of the grinding wheel 18. The grinding wheel diameter WD is calculated on the basis of the dresser diameter DD and the position DX, and a moving trajectory of the center of rotation O in a dressing coordinate system is calculated on the basis of the grinding wheel diameter WD and the dresser diameter DD. The dressing is performed by the rotary dresser 32 on the basis of the moving trajectory. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for dressing a disk-shaped grindstone having an outer peripheral straight line portion forming a grinding portion and arcuate portions continuously forming a grinding portion on both sides of the outer peripheral linear portion.

[0002]

2. Description of the Related Art A dressing device is widely used for dressing (dressing or dressing) a grinding wheel in a work grinding device. For example, JP 2000
In the tool dressing machine disclosed in Japanese Patent Publication No. 190221,
By arranging the posture of the disc-shaped dresser so as to be two-dimensionally displaceable, it is possible to dress a disc-shaped grindstone having an outer peripheral straight line portion and arc portions on both sides thereof.

By the way, in order to accurately dress a disk-shaped grindstone having an arc portion as described above, the position of the disk-shaped dresser with respect to the disk-shaped grindstone is accurately grasped, and the locus of arc interpolation is performed with high accuracy. Need to calculate. The position of the disk-shaped dresser can be obtained by using the dresser diameter and the grindstone diameter.

Conventionally, the dresser diameter has been obtained from the dresser diameter before dressing and a product of the estimated dresser wear amount per dressing and the number of dressings given in advance, and the grindstone diameter has been found. And the amount of movement until the dresser comes into contact with the grindstone.

However, since the estimated dresser wear amount is obtained by, for example, averaging accumulated dressing data obtained in the past, reliability is poor, and therefore the estimated dresser wear amount is obtained based on this value. The dresser diameter and the grindstone diameter become inaccurate with an error, and as a result, the grindstone cannot be dressed into a desired shape.

[0006]

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems and is capable of dressing a grindstone having an arcuate portion into a desired shape and controlling the amount of wear of the grindstone and the dresser. An object of the present invention is to provide a method for dressing a grindstone that facilitates the polishing.

[0007]

In order to solve the above-mentioned problems, the present invention provides an outer peripheral straight line portion which constitutes a ground portion, and circular arc portions which continuously form a ground portion on both sides of the outer peripheral linear portion. In the dressing method of a disk-shaped grindstone including
The outer peripheral portion constituting the dressing portion of the disk-shaped dresser is brought into contact with the side surface portion which is a non-ground portion of the disk-shaped grindstone, and from the reference position of the disk-shaped dresser to the side surface portion of the disk-shaped grindstone. The first step of calculating the diameter of the disk-shaped dresser based on the movement amount of the disk-shaped dresser, the outer peripheral portion of the disk-shaped dresser is brought into contact with the outer peripheral linear portion of the disk-shaped grindstone, The diameter of the disk-shaped grindstone is calculated based on the amount of movement from the reference position of the dresser to the outer peripheral linear portion of the disk-shaped grindstone and the diameter of the disk-shaped dresser calculated in the first step. And a third step of calculating a movement locus of the disc-shaped dresser for dressing the disc-shaped grindstone, based on the diameter of the disc-shaped dresser and the diameter of the disc-shaped grindstone. , Consisting of the movement locus Accordingly and performing dressing of the disc-shaped grindstone (the invention according to claim 1).

Further, the present invention provides a method for dressing a disc-shaped grindstone, comprising a peripheral straight line portion forming a grinding portion and arcuate portions continuously forming a grinding portion on both sides of the peripheral straight line portion. The outer peripheral portion that constitutes the dressing portion of the disk-shaped dresser is brought into contact with the side surface portion that is the non-ground portion of the disk-shaped grindstone, and moves from the reference position of the disk-shaped dresser to the side surface portion of the disk-shaped grindstone. The first step of calculating the amount, the outer peripheral portion of the disk-shaped dresser is brought into contact with the outer peripheral straight line portion of the disk-shaped grindstone, and the disk-shaped grindstone is moved from the reference position of the disk-shaped dresser. The second step of calculating the movement amount to the outer peripheral straight line portion, the dressing of the disk-shaped grindstone based on the movement amount calculated in the first step and the movement amount calculated in the second step Disk Third calculating a movement trajectory of the dresser
And a step of dressing the disk-shaped grindstone according to the movement locus (the invention according to claim 2).

According to the present invention, the movement locus of the dresser when dressing the arc portion of the grindstone can be calculated with high accuracy, and the grindstone having the arc portion can be dressed into a desired shape, and the grindstone and the dresser can be dressed. It becomes easy to manage the wear amount of the.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION A dressing method for a grindstone according to the present invention will be described in detail below with reference to the accompanying drawings, by showing preferred embodiments in relation to an apparatus for carrying out the method.

FIG. 1 shows a grinding device 10 for grinding a work W.
Indicates. The grinding device 10 includes a grinder 12 and a grindstone dressing device 30.

The grinder 12 is provided with a disc-shaped grindstone 18. The grindstone 18 is pivotally supported by the rotary shaft 16 of the drive motor 14. That is, the grindstone 18 rotates around the rotary shaft 16 under the rotating action of the drive motor 14 to grind the work W. In this case, the work W is, for example, a crank pin that constitutes a crank shaft. As shown in FIG. 1, the work W includes a cylindrical outer peripheral surface 11a having a straight cross section, and arcuate curved surfaces 11b formed on both end sides of the cylindrical outer peripheral surface 11a. As shown in FIG. 2, the outer peripheral portion of the grindstone 18 for grinding the work W is a straight outer peripheral portion 20 having a straight cross-sectional outer peripheral shape, and a right end of the straight outer peripheral portion 20. A right circular arc outer peripheral portion 22, a right end surface portion 24 that is continuous to the right end of the right circular arc outer peripheral portion 22, a left circular arc outer peripheral portion 26 that is continuous to the left end of the straight linear outer peripheral portion 20 and has an arc cross section outer shape, and a left circular arc. A left end surface portion 28 that is continuous with the left end of the outer peripheral portion 26 is provided. The straight outer peripheral portion 20 grinds the cylindrical outer peripheral surface 11a of the workpiece W, and the right circular arc outer peripheral portion 22 and the left circular arc outer peripheral portion 26 grind the circular arc-shaped curved surface 11b of the workpiece W. The right end surface portion 24 and the left end surface portion 28 are regions that do not contribute to the grinding of the work W and are not subject to dressing.

The grindstone dressing device 30 includes a disc-shaped rotary dresser 32. A large number of diamond particles 36 are arranged on the outer peripheral surface of the rotary dresser 32 to form a dressing surface 38. The rotary dresser 32 is
It engages with the rotating shaft 42 of the spindle unit 40. That is, the rotary dresser 32 includes the spindle unit 4
It rotates about the rotary shaft 42 under the rotating action of 0 to dress the grindstone 18 with the dressing surface 38.

The spindle unit 40 has an AE for detecting that the dressing surface 38 and the grindstone 18 are in contact with each other.
An (Acoustic Emission) sensor 44 is provided.
The AE sensor 44 detects an elastic wave (ultrasonic wave, acoustic energy) generated when the dressing surface 38 and the outer peripheral surface of the grindstone 18 come into contact with each other, converts the elastic wave into an electric signal, and outputs the electric signal to the control unit 66.

The spindle unit 40 is axially supported by the shaft member 48 of the first support member 46. Spindle unit 4
0 is rotatable in the direction of arrow A about the shaft member 48, and its rotation control is performed by the A-axis rotation control unit 60.

The first support member 46 engages with a first guide member 50 extending in the X-axis direction. The X-axis direction displacement control of the first support member 46 is performed by the X-axis displacement control unit 62.

The first guide member 50 is supported by the second support member 52, and the second support member 52 is a second support member extending in the Z-axis direction.
The guide member 54 is engaged. The displacement control of the second support member 52 in the Z-axis direction is performed by the Z-axis displacement controller 64.

The control unit 66 basically has a CPU 68.
And a storage unit 70 that stores an NC program for setting the dressing surface 38 to a desired position and posture, various management data described later, and the like.

That is, the control unit 66 drives the A-axis rotation control unit 60, the X-axis displacement control unit 62, and the Z-axis displacement control unit 64 to control the rotary dresser 32 to a desired position and posture, and further, the spindle. The unit 40 is driven, the rotary dresser 32 is rotated at a desired speed, and the grindstone 18
To the desired shape.

The grinding apparatus 10 according to the present embodiment is basically constructed as described above. Next, the dressing method of the grindstone 18 in the grindstone dressing apparatus 30 and the function and effect will be described.

Prior to dressing the grindstone 18, FIG.
As shown in, a dress coordinate system is set with the rotation center O of the rotary dresser 32 at the reference position P0 as the origin. 4 to 10 are flowcharts for explaining a dressing method of the grindstone 18 in the grindstone dressing device 30. The flowchart shown in FIG. 4 is a main routine, and the flowcharts shown in FIGS. 5 to 10 show each subroutine in the main routine.

First, it is determined whether or not the grindstone 18 has been replaced (step S1). When the grindstone 18 is replaced, it is determined whether the replaced grindstone 18 is a new grindstone or a grindstone dressed last time (step S).
2).

When the grindstone 18 is replaced with a new grindstone 18, the grindstone diameter WD and the grindstone width WW, which are specification data that may include an error, are input, and a known dresser diameter DD, for example, a master jig is used. Dresser diameter measured by D or dresser diameter D obtained at the end of the previous dressing
D is read from the storage unit 70 (step S3). The grindstone diameter WD and the grindstone width WW are input through an input device such as a keyboard and a mouse (not shown) connected to the control unit 66, or transmitted as data from another device through an interface (not shown). . Then, the process of step S4 is executed.

When the whetstone 18 that has been dressed last time is replaced, the whetstone diameter WD obtained at the last dressing, the right end surface contact position DZ1 of the whetstone 18 obtained at the last dressing, and the last dressing obtained The left end face contact position DZ2 of the grindstone 18 and the dresser diameter D
D and D are read from the storage unit 70 (step S5), and the process of step S6 is executed.

When the grindstone 18 is not replaced, the grindstone diameter WD obtained at the last dressing, the right end surface contact position DZ1 obtained at the last dressing, and the left end surface contact position DZ2 obtained at the last dressing are stored. It is read from the unit 70 (step S7), and it is determined whether the rotary dresser 32 has been replaced (step S8).

When the rotary dresser 32 is not replaced, the dresser diameter DD is read from the storage unit 70 (step S9), and the process of step S10 is executed.

When the rotary dresser 32 is replaced, the dresser diameter DD of the replaced rotary dresser 32 is input (step S11). The dresser diameter DD is accurately measured in advance by a master jig or the like and input through an input device such as a keyboard or a mouse (not shown) connected to the control unit 66, or shown via an interface (not shown). Not sent as data from another device. Then, the process of step S12 is executed.

Next, the processing shown in step S4 will be described in detail below with reference to FIGS. Using the dresser diameter DD read in step S3, the grindstone 18
The right end face predicted contact position DZ1 ′, which is the predicted position in the Z-axis direction of the rotation center O of the rotary dresser 32 when the dressing surface 38 contacts the right end face portion 24 of the above, is calculated (step S20), and the rotary dresser 32 is moved at high speed. Then, the position near the expected contact position DZ1 'on the right end face (in FIG. 3,
The position is approached to a position slightly right of the position P1 (step S21). Next, the moving speed of the rotary dresser 32 is switched to a low speed, and the rotary dresser 32 moves the grinding stone 18
It is moved until it comes into contact with the right end face portion 24 (step S
22). The movement of the rotary dresser 32 in steps S21 and S22 is performed by the A-axis rotation control unit 60, X.
This is performed by the axial displacement control unit 62 and the Z-axis displacement control unit 64. The rotary dresser 32 and the right end surface portion 24 of the grindstone 18
When the contact with is detected by the AE sensor 44 (step S23), the position of the rotation center O of the rotary dresser 32 at that time in the Z-axis direction (right end face contact position DZ).
1) is calculated (step S24). The calculated right end surface contact position DZ1 is stored in the storage unit 70 of the control unit 66.

In step S25, equation (1) shown below is used.
The attachment position error WT of the grindstone 18 is calculated based on, and stored in the storage unit 70. WT = DZ1'-DZ1 (1)

Similarly, the expected contact position DZ2 'on the left end face is calculated using the dresser diameter DD (step S26),
The rotary dresser 32 is moved at high speed to approach the position near the left end face expected contact position DZ2 '(a position slightly left of the position P2 in FIG. 3) (step S2).
7). Next, the moving speed of the rotary dresser 32 is switched to a low speed, and the rotary dresser 32 is moved until it comes into contact with the left end surface portion 28 of the grindstone 18 (step S28).
When the contact between the rotary dresser 32 and the left end surface portion 28 of the grindstone 18 is detected by the AE sensor 44 (step S
29), the rotation center O of the rotary dresser 32 at that time
The position in the Z-axis direction (left end surface contact position DZ2) is calculated (step S30). The calculated left end surface contact position DZ2 is stored in the storage unit 70.

In step S31, equation (2) shown below is used.
Based on the above, the grindstone width WW is calculated and stored in the storage unit 70. WW = DZ2-DZ1-DD (2)

In step S32, the expected outer peripheral portion contact position DX 'is calculated using the dresser diameter DD. The rotary dresser 32 is moved at a high speed to approach a position near the linear outer peripheral portion expected contact position DX '(a position slightly above the position P3 in FIG. 3) (step S33). Next, the moving speed of the rotary dresser 32 is switched to a low speed, and the rotary dresser 32 moves the linear outer peripheral portion 2 of the grindstone 18.
It is moved until it contacts 0 (step S34). When the contact between the rotary dresser 32 and the linear outer peripheral portion 20 of the grindstone 18 is detected by the AE sensor 44 (step S3
5) Then, the position of the rotation center O of the rotary dresser 32 at that time in the X-axis direction (the linear outer peripheral portion contact position DX) is calculated (step S36). The calculated linear outer peripheral portion contact position DX is stored in the storage unit 70. Step S3
In 7, the grindstone diameter WD is calculated from the linear outer peripheral portion contact position DX calculated in step S36 and the dresser diameter DD. The calculated grindstone diameter WD is stored in the storage unit 70.

In step S38, from the dresser diameter DD and the grindstone diameter WD calculated in step S37, or the moving amount of the rotation center O of the rotary dresser 32 (right end face contact position DZ1, left end face contact position DZ2, straight outer circumference). Part contact position DX), the movement locus of the rotation center O in the dress coordinate system (see FIG. 3) for dressing the linear outer peripheral portion 20, the right circular arc outer peripheral portion 22 and the left circular arc outer peripheral portion 26 of the grindstone 18 into a desired shape. Is calculated. Based on the movement locus, each part of the grindstone 18 by the rotary dresser 32 (straight line outer peripheral part 20, right circular arc outer peripheral part 22, left circular arc outer peripheral part 2)
6) Dressing is performed (step S39). After the dressing, the grindstone diameter WD after the dressing is calculated, and the calculated grindstone diameter WD is stored in the storage unit 70 (step S4).
0). The wheel diameter WD in this case is determined by bringing the rotary dresser 32 into contact with the right end surface portion 24 of the wheel 18 again to calculate the dresser diameter DD after dressing, and then bringing the rotary dresser 32 into contact with the linear outer peripheral portion 20 of the wheel 18. , The straight line outer peripheral portion contact position DX is obtained.

As described above, in the process, when the grindstone 18 is replaced with a new grindstone 18, the known dresser diameter DD is used, and the outer peripheral portion of the right circular arc is irrespective of whether or not there is an error in the mounting position of the grindstone 18 in the Z-axis direction. 22 and the movement path of the rotary dresser 32 including the left circular arc outer peripheral portion 26 are calculated, and the grindstone 18
Can be dressed.

In the process shown in step S6 of FIG. 4, when the grindstone 18 is replaced, the grindstone dressing device 3 of the last time is replaced.
Using the data obtained during 0 dressing, the movement trajectory of the rotary dresser 32 is calculated in substantially the same manner as in the processing.

Next, the processing shown in step S10 will be described in detail below with reference to FIGS. The previous right end surface contact position DZ1 read in step S7 is set as the right end surface expected contact position DZ1 '(step S10).
0). The rotary dresser 32 is moved at high speed to move to a position in the vicinity of the expected contact position DZ1 'on the right end face (position P in FIG. 3).
(Slightly to the right of position 1) (step S
101). Next, the moving speed of the rotary dresser 32 is switched to a low speed, and the rotary dresser 32 is moved until it comes into contact with the right end surface portion 24 of the grindstone 18 (step S10).
2). The rotary dresser 32 and the right end surface portion 24 of the grindstone 18
When contact with the AE sensor 44 is detected by the AE sensor 44 (step S103), the position of the rotation center O of the rotary dresser 32 at that time in the Z-axis direction (right end face contact position DZ).
1) is calculated (step S104). The calculated right end surface contact position DZ1 is stored in the storage unit 70.

In step S105, the dress wear amount DM is calculated based on the following equation (3), and the calculated dress wear amount DM is stored in the storage unit 70. DM = DZ1'-DZ1 (3)

In step S106, step S9
The previous dresser diameter DD read in step S1
The current dresser diameter DD is calculated from the dress wear amount DM obtained in step 05 and stored in the storage unit 70 (step S10).
6).

The expected outer peripheral portion contact position DX 'is calculated from the previous wheel diameter WD read in step S7 and the current dresser diameter DD calculated in step S106 (step S107). The rotary dresser 32 is moved at a high speed to approach a position near the linear outer peripheral portion expected contact position DX '(a position slightly above the position P3 in FIG. 3) (step S108). Next, the moving speed of the rotary dresser 32 is switched to a low speed, and the rotary dresser 32 is moved until it comes into contact with the linear outer peripheral portion 20 of the grindstone 18 (step S109). When the contact between the rotary dresser 32 and the linear outer peripheral portion 20 of the grindstone 18 is detected by the AE sensor 44 (step S110), the position of the rotation center O of the rotary dresser 32 at that time in the X-axis direction (the linear outer peripheral portion contact position). DX) is calculated (step S111). The calculated linear outer peripheral portion contact position DX is stored in the storage unit 70.

In step S112, step S106
The current dresser diameter DD calculated in step S11
The current grindstone diameter WD is calculated from the linear outer peripheral portion contact position DX calculated in 1.

In step S113, the wheel diameter WD acquired in the previous dressing read in step S7.
Then, the difference between the present grinding wheel diameter WD calculated in step S112 is calculated to calculate the grinding wheel wear amount WM, and the calculated grinding wheel wear amount WM is stored in the storage unit 70.

In step S114, step S106
The current dresser diameter DD calculated in step S11
Of the grinding wheel 18 from the current grinding wheel diameter WD calculated in 2 or from the movement amount of the rotation center O of the rotary dresser 32 (right end surface contact position DZ1, left end surface contact position DZ2, straight outer peripheral contact position DX). A movement locus of the rotation center O in the dress coordinate system (see FIG. 3) for dressing the straight line outer peripheral portion 20, the right circular arc outer peripheral portion 22, and the left circular arc outer peripheral portion 26 into a desired shape is calculated. Based on the movement trajectory, each part of the grindstone 18 by the rotary dresser 32 (straight line outer peripheral portion 20, right circular arc outer peripheral portion 22, left circular arc outer peripheral portion 26).
Dressing is performed (step S115). After the dressing is completed, the dressing wheel diameter WD is calculated, and the calculated dressing wheel diameter WD is stored in the storage unit 70 (step S116). As for the grindstone diameter WD in this case, the rotary dresser 32 is again brought into contact with the right end surface portion 24 of the grindstone 18, the dresser diameter DD after dressing is calculated, and the straight line outer peripheral portion 20 is brought into contact with the straight outer peripheral portion contact position DX. It is obtained by doing.

In step S117, it is determined whether or not the grindstone 18 is scheduled to be replaced before the next dressing. If the grindstone 18 is not scheduled to be replaced, the process is terminated,
If the whetstone 18 is scheduled to be replaced, step S11
The processes of 8 to S124 are executed. In this case, the processing of steps S118 to S124 is the same as step S100 described above.
It is the same as the processing of S106. That is, when the replacement of the grindstone 18 is scheduled (that is, when the process or the process is executed next time), steps S118 to S12.
Since the accurate dresser diameter DD after dressing is calculated by performing the processing of No. 4, the grinding wheel diameter WD can be accurately calculated in the processing or the processing.

As described above, in the processing, the rotary dresser 32 is brought into contact with the right end surface portion 24 and the straight outer peripheral portion 20 of the grindstone 18 so that the dresser diameter DD and the grindstone diameter WD, or the rotation center O of the rotary dresser 32. Since the movement amount of the right circular arc can be accurately calculated,
Also, the movement locus of the rotary dresser 32 including the outer peripheral portion 26 of the left circular arc can be calculated, and the grindstone 18 can be dressed with high accuracy.

The process shown in step S12 of FIG. 4 is executed when the rotary dresser 32 is replaced, as described above. In this case, the rotary dresser 32 has not been worn because it has just been replaced. That is, the only difference between the processes is that the dress wear amount DM calculation process in step S105 of the process is not performed. In the process, the movement locus of the rotary dresser 32 is calculated in substantially the same manner as the process, using the data obtained during the previous dressing by the grindstone dressing device 30.

[0046]

As described above, according to the present invention, the diameter of the grindstone and the diameter of the dresser or the movement amount of the dresser with respect to the grindstone can be accurately detected, so that the movement locus of the dresser with respect to the grindstone having the arc portion can be increased. It can be calculated accurately. Therefore, it is possible to dress the outer peripheral portion of the grindstone, in particular, the arcuate portion requiring precision to a desired shape. Further, it is easy to control the amount of wear of the grindstone and the dresser.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of a grinding device of the present embodiment.

FIG. 2 is a vertical sectional view taken along the line II-II of FIG.

FIG. 3 is an explanatory diagram of a dress coordinate system.

FIG. 4 is a flowchart illustrating a main routine process of grinding wheel dressing.

FIG. 5 is a flowchart illustrating a subroutine process when a new grindstone is replaced.

FIG. 6 is a flowchart illustrating a subroutine process when a new grindstone is replaced.

FIG. 7 is a flowchart illustrating a subroutine process when a new grindstone is replaced.

FIG. 8 is a flowchart illustrating a subroutine process when neither a grindstone nor a dresser has been replaced.

FIG. 9 is a flowchart illustrating a subroutine process when neither the grindstone nor the dresser has been replaced.

FIG. 10 is a flowchart illustrating a subroutine process when neither the grindstone nor the dresser has been replaced.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 ... Grinding device 12 ... Grinder 18 ... Whetstone 20 ... Straight outer peripheral part 22 ... Right circular arc outer peripheral part 24 ... Right end face part 26 ... Left circular arc outer peripheral part 28 ... Left end face part 30 ... Whetstone dressing device 32 ... Rotary dresser 36 ... Diamond particle 38 ... Dressing surface 40 ... Spindle unit 44 ... AE sensor 48 ... Shaft member 60 ... A axis rotation control section 62 ... X axis displacement control section 64 ... Z axis displacement control section 66 ... Control section 68 ... CPU 70 ... Storage section

Continued front page    (72) Inventor Satoshi Kaneko             1-10-1 Shinsayama, Sayama City, Saitama Prefecture             Engineering Co., Ltd. F term (reference) 3C047 DD02 DD03 DD19 DD20

Claims (2)

[Claims] 1. A dressing method for a disk-shaped grindstone, comprising: an outer peripheral straight line portion forming a grinding portion; and circular arc portions continuously forming grinding portions on both sides of the outer peripheral straight line portion. The outer peripheral portion constituting the portion is brought into contact with the side surface portion which is a non-ground portion of the disk-shaped grindstone, based on the amount of movement from the reference position of the disk-shaped dresser to the side surface portion of the disk-shaped grindstone, A first step of calculating the diameter of the disc-shaped dresser, the outer peripheral portion of the disc-shaped dresser is brought into contact with the outer peripheral linear portion of the disc-shaped grindstone, and from the reference position of the disc-shaped dresser. A second step of calculating the diameter of the disk-shaped grindstone based on the amount of movement of the disk-shaped grindstone to the outer peripheral linear portion and the diameter of the disk-shaped dresser calculated in the first step; In front of the disk-shaped dresser A third step of calculating a movement locus of the disc-shaped dresser for dressing the disc-shaped grindstone on the basis of a diameter and the diameter of the disc-shaped grindstone, and the disc-shaped grindstone according to the movement locus The dressing method of the grindstone characterized by performing the dressing of. 2. A dressing method for a disk-shaped grindstone, comprising: an outer peripheral straight line portion forming a grinding portion; and circular arc portions continuously forming grinding portions on both sides of the outer peripheral straight line portion. The outer peripheral portion constituting the portion is brought into contact with the side surface portion which is a non-ground portion of the disk-shaped grindstone, and the movement amount from the reference position of the disk-shaped dresser to the side surface portion of the disk-shaped grindstone is calculated. 1st step, the said outer peripheral part of the said disk-shaped dresser is made to contact the said outer peripheral linear part of the said disk-shaped grindstone, and the said outer peripheral linear part of the said disk-shaped grindstone from the said reference position of the said disk-shaped dresser. To the disk-shaped dresser based on the movement amount calculated in the first step and the movement amount calculated in the second step. Transfer of Third and step consists, dressing method of the grindstone, characterized in that dressing of the disc-shaped grinding wheel in accordance with the movement locus of calculating the trajectory.