JPH0752041A - Dressing method for cutting edge of slicing device and device therefor - Google Patents

Abstract

PURPOSE:To efficiently perform both the whole face dressing and the side face dressing of a cutting edge for slicing a work by the use of a single dress stone. CONSTITUTION:Slits C1, C2, C3, C4 are formed on a dress stone DS at equal spaces t1 by means of the cutting edge 11 of a blade 10, and hence after performing the whole dressing of the cutting edge 11 at a plurality of times, a slit C5 is formed leaving a space t2 larger than the space t1 so as to perform the last whole dressing. Next, the dress stone DS is minutely indexed from the whole dressing completed position, and the side dressing is performed by cutting only one side edge part of the slit C5 by means of the one side of the cutting edge 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a slicing device for cutting a work such as a semiconductor ingot by a cutting blade provided on a peripheral portion of a rotating blade to cut a thin piece such as a semiconductor wafer. The present invention relates to a method and an apparatus for performing.

[0002]

2. Description of the Related Art Conventionally, as a slicing device as described above, a blade having a circular cutting edge is provided on the inner circumference, one end of the work is exposed to the inside thereof, and the blade is rotated while rotating against the work. It is known that a blade is cut out from the work by moving the blade relatively in the radial direction. In such an apparatus, by repeating slicing, the sharpness of the cutting edge becomes dull and causes slicing failure, so that the sharpness of this cutting edge is kept good and in order to maintain the production of excellent products, it is appropriate. It is necessary to dress the cutting edge at the right time.

Such dresses include so-called full-face dresses for dressing the entire cutting edge and so-called side dresses for dressing only one side surface of the cutting edge. Full-face dressing is performed before the use of the cutting edge or when the cutting edge becomes dull due to the use of the cutting edge.For side dressing, the sharpness on one side of the cutting edge is better than the sharpness on the other side. Is relatively dull, and is performed when the blade is bent due to the imbalance.

Conventionally, as a method for dressing the entire surface, as shown in FIG. 12, for example, a cutting edge 11 on the inner peripheral surface of the blade 10 is cut to a position before the dress stone DS having a prismatic shape is completely cut. There is used a means of cutting in the radial direction and then extracting in the opposite direction. In this full-face dressing, the dressstone DS is indexed at a predetermined pitch in the axial direction (to the left in FIG. 12) every time the cutting operation and the extracting operation are performed. The same number of cuts C will be formed at a predetermined pitch.

On the other hand, as a method of performing side dressing, means shown in FIG. 13 is used. For example, when dressing one side 11a of the cutting edge 11,
As shown by the solid line in the figure, when the plate-like dress stone DS is reciprocally moved in contact with the one side surface 11a in an oblique state and the opposite one side surface 11b is dressed, the same operation is performed. An operation of turning the dressstone DS 180 ° from the solid line position to the two-dot chain line position and reciprocating the same as above is performed.

[0006]

According to the above-mentioned means, in order to dress the cutting edge 11, a device for dressing the entire surface as shown in FIG. 12 and a side dressing as shown in FIG. 13 are carried out. Therefore, it is inevitable to increase the size and cost of the equipment. Further, when the full dress and the side dress are continuously performed, the positioning operation for performing the full dress and the positioning operation for performing the side dress have to be individually performed, resulting in poor work efficiency.

In view of such circumstances, the present invention provides a method and apparatus for dressing a cutting edge in a slicing apparatus, which is capable of continuously and efficiently dressing the entire surface and the side surface of the blade with simple equipment. The purpose is to do.

[0008]

DISCLOSURE OF THE INVENTION The present invention is a slicing apparatus having a cutting edge on the peripheral edge thereof and a blade which is driven to rotate during work slicing, in which the stone is applied to the blade while rotating the blade. Cutting blade of the blade by performing a cutting operation for cutting the stone to a position before complete cutting of the stone by moving the stone in the radial direction and then an extracting operation for moving the stone in the opposite direction to the blade. After dressing the entire surface, the stone is relatively moved in the axial direction with respect to the blade to a position where one side edge of the cut formed in the stone by the cutting operation and the cutting edge of the blade face each other, and at this position By performing the cutting operation on the one side edge portion, only one side surface of the cutting blade is drained. A method of (claim 1).

In this method, the dressing on the entire cutting edge is set to 2
When the natural number N is performed N times, the cutting operation, the extracting operation, and the indexing operation of axially moving the stone relative to the blade by a distance larger than the width dimension of the cutting edge ( By repeating N-1) times, the entire surface of the cutting edge is dressed (N-1) times, and then the stone is axially moved with respect to the blade at a distance larger than the relative movement distance in the indexing operation up to that point. The cutting edge and the extracting operation at this position to dress the entire surface of the cutting edge a total of N times, and then from this position, the stone is sized in the axial direction with respect to the blade. More preferably, only one side surface of the cutting edge is dressed by relatively moving the cutting edge at a smaller distance and performing the cutting operation at this position. .

Further, in the slicing apparatus of the present invention, there is provided a cutting feed means for moving the stone in the radial direction of the blade, and an indexing feed means for moving the stone in the axial direction of the blade. A dressing control means for executing the dressing method (claims 3 and 4).

[0011]

According to the above method and device, the cutting edge of the blade is subjected to the cutting operation and the extracting operation with respect to the stone to dress the entire surface of the cutting edge, and then the stone is moved from the position where the cutting operation is performed. Only one side surface of the cutting edge can be dressed by slightly shifting the relative position in the axial direction with the blade and re-cutting the one side edge of the cut by the above-mentioned full-face dressing. That is, it is possible to perform both full dressing and side dressing of the cutting edge with a single stone.

[0012] Here, in the case where the side dressing is performed after the stones are indexed in the axial direction with respect to the blade and continuously dressed N times over the entire surface, according to the method and apparatus of claims 2 and 4, By setting the indexing distance of the stone immediately before the cutting operation to be larger than the indexing distance before that, the cutting formed on the stone by the Nth cutting operation and the (N-1) th cutting operation A cutting margin larger than the distance between other cuttings is ensured between the cutting formed in the stone and. Therefore, it is possible to dress the side surface of each of the cutting edges a sufficient number of times by utilizing the cutting by the N-th cutting operation.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings.

The slicing apparatus shown in FIGS. 2 and 3 comprises a base 1, on which a guide rail 2 is installed, and a slide table 3 is slidably supported along the guide rail 2. ing.

A headstock 4 is installed on the base 1 at a position facing the slide table 3. A main bearing 4a is provided above the headstock 4, and the main shaft 6 is rotatably supported by the main bearing 4a.
An output shaft of a main shaft drive motor 8 is connected to the main shaft 6 via a belt transmission mechanism 7. A tension disk 9 is fixed to the tip of the main shaft 6, and the tension disk 9 is rotatably driven by a rotary drive means 5 including the main shaft 6, the belt transmission mechanism 7, and a main shaft drive motor 8. . At the periphery of the tension disc 9,
A blade 10 made of a donut-shaped thin plate is mounted, and a cutting edge 11 made of diamond particles or the like is fixed to the inner peripheral edge of the blade 10.

A holding member 15 and index feeding means 18 are provided on the slide table 3, and the holding member 15 is provided.
Is a work 30 made of a silicon semiconductor ingot or the like.
Is held. The indexing feed means 18 has a ball screw 16 and a holding member drive motor 17 that rotationally drives the ball screw 16. The indexing feed means 18 causes the holding member 15 to slide in the axial direction of the spindle 6. By being driven, one end of the work 30 can slightly project from the front surface side of the blade 10, that is, the work holding side, to the back surface side through the central hole of the blade 10.

On the slide table 3, a cutting blade 11 is provided.
A dressing device 19 for dressing is provided.
The dressing device 19 holds the dressing stone DS and appropriately supplies the stone DS to a cutting position (dressing position) by the blade 10. The specific structure thereof will be described in detail later.

On the base 1 is provided a cutting feed means (constituting a cutting feed means in the present invention) 14 having a ball screw 12 and a cutting feed motor 13 for rotationally driving the ball screw 12. There is. This cutting feed means 1
4, the entire slide table 3 is slidably driven along the guide rails 2 in the direction orthogonal to the main shaft 6, and the slide table 3 slides from the front side to the back side in FIG.
Is relative to the blade 10 in the radial direction (arrow A in FIG. 3).
Direction (i.e., direction) relative movement (that is, cutting feed). Therefore, by rotating the blade 10 and performing the cutting feed with one end of the work 30 facing the inside of the blade 10, one end of the work 30 is sliced by the cutting blade 11 and the wafer (thin piece) is cut.
Is cut out. Further, the cutting edge 11 is dressed by exposing the stone DS instead of the blade 10.

A slice base 31 made of carbon or the like is fixed to the outer peripheral portion of the work 30 on the downstream side in the cutting feed direction, that is, the portion of the work 30 that is finally cut by the cutting blade 11. By fixing the slice base 31, it is possible to prevent the cutting resistance acting on the blade 10 from being suddenly released at the end of the cutting of the work 30 to prevent the final cut portion of the work 30 from being chipped.

A resistance detecting means 24 is attached to an end portion on the back side of the work 30. This resistance detecting means 24 is
Based on the distribution of the load received from the work 30 during the cutting work of the work 30, the work 30 as shown in FIG.
The cutting resistance Fx in the radial direction and the cutting resistance Fz in the axial direction of the work 30 are detected.

Next, the structure of the dressing device 19 is shown in FIGS.
It will be described with reference to FIG.

In FIG. 5, reference numeral 70 denotes a base fixed on the slide table 3, and the base 70 has:
A pair of left and right guide rods 71 as shown in FIG. 2 are fixed. Sliders 73 are attached to these guide rods 71 so as to be slidable along the guide rods 71 via ball bearings 72. A stone advancing / retreating cylinder 74 is fixed to the rear end of the base 70, and the stone advancing / retreating cylinder 74 is extended / contracted by a cylinder drive circuit 75. Then, the slider 73 is attached to the tip of the rod 76 of the stone advancing / retreating cylinder 74.
Are connected.

A table 77 is fixed to the slider 73, and a dressing device main body 80 is fixed on the table 77. As shown in FIG. 7, the dressing device main body 80 includes a cylindrical housing 81, and a shaft 83 is held in the housing 81 via a ball bearing 82 so as to be movable back and forth (movable in the left and right directions in FIG. 7). Has been done. A ball screw device 84 and a stepping motor 85 are fixed to the rear end portion of the housing 81, and the rotation of an output shaft (not shown) of the stepping motor 85 is caused by the ball screw device 84 to move the shaft 86 forward and backward. It is designed to be converted to. A seat 87 is provided between the tip of the shaft 86 and the rear end of the shaft 83, and a coil spring 90 for restricting backlash is press-fitted in the space in front of the seat 87. A chuck 91 is fixed to the tip of the shaft 83, and the dressstone DS is detachably held by the chuck 91. Further, a rotation stop pin 88 is provided on the seat 87 so as to project radially outward, and the rotation stop pin 88 is fitted in an axial elongated hole 89 formed in the peripheral surface of the housing 81.

As the stone advancing / retracting cylinder 74 extends, the dressing device main body 80 as a whole advances together with the slider 73 to advance to the dressing position where the end of the dressing stone DS faces the inside of the blade 10. When the stone advancing / retreating cylinder 74 retreats, the dressing device main body 80 as a whole retreats and the dressstone DS retracts to a position behind the blade 10. Also, the stepping motor 85
The output shaft of the shaft 8 is rotated by the action of the ball screw device 84.
6, the shaft 83 is pushed out stepwise by the shaft 86 via the seat 87, and the dressstone DS attached to the tip of the shaft 83 is indexed by a predetermined pitch. This specific operation will be described in detail later.

This slicing device has a drive control section 40 as shown in FIG. This drive control unit 40
Includes a reference resistance storage device 41, a comparator 42, a cutting feed speed calculation device 51, a cutting feed motor control device 52, a dress timing determination device 61, and a dress control device 62.

In the figure, the reference resistance memory device 41 is
The resistance detection is performed when the work 30 is moved to a position immediately before the start of cutting by driving the cutting feed motor 13 (a position slightly left of the position shown by the two-dot chain line on the left side in FIG. 3; hereinafter referred to as the immediately preceding position). The resistance in each direction detected by the means 24 is stored as a reference resistance. The comparator 42 fetches the resistances Fx and Fz in each direction detected by the resistance detecting means 24 at a predetermined sampling cycle, and subtracts these values from the reference resistance stored in the resistance detecting means 24. Is calculated and output as the actual cutting resistance. This calculated cutting resistance F
x and Fz are input to the cutting feed speed calculation device 51 and the dress timing determination device 61.

The cutting feed speed calculator 51 calculates a target cutting feed speed required to reduce the cutting resistance detected by the comparator 42 when receiving a drive command signal from the cutting feed motor controller 52. , And outputs a signal corresponding to the calculation result to the cutting feed motor control device 52.

The cutting feed motor control device (constituting dressing operation control means) 52 controls the cutting feed motor 13 based on a signal from the speed calculation device 51. Further, the cutting feed motor control device 52 controls the cutting feed motor 13 so as to perform a feeding operation required for the dress when a dress mode described later is entered.

The dress timing determination device 61 determines, when it receives the drive command signal, whether or not it is time to perform dressing based on the cutting resistances Fx and Fz.
When it is determined that the dressing timing is reached, a command signal is output to the dressing control device 62, and the work mode of the device is switched to the dressing mode at a predetermined time.
Specifically, when no dressing is performed at all, the cutting resistances Fx and Fz increase as the number of cut workpieces increases as shown in FIG. 8A, and therefore, as shown in FIG. As a general rule, when the cutting resistance Fx increases by a certain amount or more, a full-face dressing command is output, and when the absolute value of the cutting resistance Fx increases by a certain amount or more, a side surface dressing command for the side face corresponding to the positive / negative is output. The cutting resistance Fx,
Prevents an increase in Fz. Dress control device (dress control means)
Reference numeral 62 controls the dressing device 19 so as to perform the operation required for dressing at the time of receiving the command signal, that is, at the time of entering the dressing mode, and cuts and feeds it through the motor control device 52 in the dressing mode. It is configured to control the dressing of the motor 13.

Next, the control operation performed by the dress control device 62 when the dress mode is entered will be described with reference to the flow chart of FIG. In the following explanation,
A case will be described in which after performing the whole-face dressing operation a plurality of times, the side-dressing operation is continuously performed.

First, the dressing conditions, specifically, the number of times mo that requires full-face dressing, the number of times that side dressing is required, and the side surface of the cutting edge 11 that requires side dressing (inner cutting surface 1
1a or outer cut surface 11b) is the cutting resistance Fx,
It is set based on Fz (step S1). Then
The dress stone DS advances to the dress position by the extension of the stone advance / retreat cylinder 74 and is positioned (step S2), and at the same time, the variable m for counting the number of stone indexing in the full dress mode is reset to 0 (step S3). ). Then, the full-face dressing operation is started from this state (step S4).

Specifically, while rotating the blade 10 at a predetermined number of revolutions, the dressing stone DS is moved in the radial direction of the blade 10 so that the cutting edge 11 is cut into the dressing stone DS. The entire surface of 11 is dressed. Then, the blade 10 moves in the opposite direction, so that the cutting edge 11 is extracted from the cut formed in the dress stone DS.

Each time such an entire dressing operation is performed, 1 is added to the count variable m (step S
5) Until the variable m reaches (mo-1) (NO in step S6), an operation of indexing the dressstone DS by a dimension obtained by adding the dimension t1 to the cutting width (≈width dimension of the cutting edge 11) (step). The step S7) and the full dressing operation (step S4) are repeated.

After the variable m reaches (mo-1), that is, after the (mo-1) th total dressing operation is completed (YES in step S6), the dressstone DS sets the cut width to the predetermined dimension t2. Only the dimension to which (> t1) is added is calculated (step S8), and then the final full face dressing operation is executed (step S9). With the above operation, as shown in FIG. 10, (mo-1) (four in the illustrated example) cuts C1, C2, C3, C4 are formed at equal intervals t1 in the dressstone DS, and The final cut C5 is formed with a space t2 larger than the space t1 from the cut C4.

After the completion of such a full-face dressing mode, the side dressing mode is entered. First, the variable n for counting the number of side dressing operations is reset to 0 (step S10), and is smaller than the width dimension of the cutting edge 11 in a predetermined direction from the position where the entire dressing is completed (that is, the last cutting position). Dressstone DS only for small dimension t3
Is calculated (step S11). This "predetermined direction"
Is the inner surface 11a of the cutting blade 11 as shown in FIG.
When dressing the outer side surface 11b of the cutting edge 11 as shown in FIG. 6B, the dressing direction is set to the backward direction opposite to the indexing direction up to that time. It is set in the forward direction that is the same as the indexing direction of.

After such an indexing operation, a cutting operation and a withdrawing operation are carried out in the same manner as the above-mentioned whole surface dressing operation, so that the cutting edge 1 is cut as shown in FIGS.
Only the inner side surface 11a or the outer side surface 11b of No. 1 cuts the one side edge portion of the final cut C5 while the dress stone DS is in contact, and thereby only one of the side surfaces 11a and 11b is dressed (step S
12).

Each time the stone fine indexing operation and the side dressing operation are performed, 1 is added to the variable n (step S13), and the variable n is set to the preset number no.
(YES in step S14), the dress stone DS retracts from the dress position due to the contraction of the stone advancing / retracting cylinder 74 (step S15), and the dress mode ends.

As described above, this dressing method and apparatus utilize the notch C5 formed in the dressstone DS by the full-face dressing operation to make the same dressstone D.
By contacting S with only one side surface 11a or 11b of the cutting edge 11, it is possible to perform both full-side dressing and side-side dressing with a single device. Compared with the case where a device and a device for side dressing are installed side by side, it is possible to reduce the size and cost of the equipment, and it is possible to significantly reduce the time required when performing full dress and side dress continuously. .

The present invention is not limited to such an embodiment, and the following modes can be adopted as an example.

(1) In the above embodiment, the case where the full face dressing operation and the side dressing operation are continuously performed a plurality of times has been described.
In the present invention, the number of dressing operations is not particularly limited. However, when performing the side dressing operation after performing the full dressing operation a plurality of times consecutively as in the above embodiment, the indexing dimension at the time of shifting to the final full dressing operation is larger than the indexing dimension up to that point. If you set a large value, the final cut C5
And a sufficient cut margin t2 between the previous cut C4 and
Can be ensured and therefore the final cut C
When the side dressing operation is performed by using 5, the inner side surface 11a and the outer side surface 11b of the cutting blade 11 can be side dressed.

Further, the present invention is not limited to the case where the full dressing operation and the side dressing operation are carried out continuously, but after the completion of the full dressing operation, the dressing device main body 80 is once retracted to make the work 30.
Slicing, then again dressing device body 80
It can also be applied to the case of performing the side dressing operation by moving forward. Also in this case, if the stepping motor 85 is stopped during the slicing of the work 30, the dressing device main body 80 is moved forward by the extension of the stone advancing and retracting cylinder 74, and the dressing stone DS is returned to the position immediately after the completion of the full dressing operation. The side dressing motion can be indexed from this position.

(2) In the above embodiment, the blade 10 is fixed and the dressstone DS is moved in the radial direction of the blade 10.
S may be fixed and the blade 10 may be moved in the radial direction. Further, regarding the indexing of the dressstone DS, the dressstone DS may be fixed and the blade 10 may be sequentially moved in the axial direction.

[0043]

As described above, according to the present invention, the dress stone is cut by the cutting blade to perform the entire dressing of the cutting blade, and the one side edge portion of the cut formed in the stone by this cutting operation is cut as described above. By cutting with a blade, only one side of this cutting edge is brought into contact with the stone so that only this one side is side-dressed. Both full dress and side dress can be performed using a single device and a single dressstone without the need for side by side equipment. For this reason, there is an effect that the size and cost of the equipment can be reduced and the work required when shifting from the full dress to the side dress can be greatly simplified and the dressing time can be shortened.

Here, the above-mentioned full-face dressing operation is set to N (≧ 2).
When performing side dressing operation after repeating continuously,
(N-1) After the dressing operation of the entire face is completed, the dressing stone is indexed by a distance larger than the relative movement distance in the indexing operation up to that time, and the Nth dressing operation is performed. In the notch formed by the Nth full-face dressing operation at (N
-1) A sufficient cut margin can be secured between the cut formed by the first full-face dressing operation,
Therefore, there is an effect that the side surface on any side of the cutting edge can be laterally dressed by utilizing the notch formed by the Nth entire surface dressing operation.

[Brief description of drawings]

FIG. 1 is a block diagram showing a functional configuration of a drive control unit provided in a slicing device according to an embodiment of the present invention.

FIG. 2 is a partially cut front view of the slicing device.

3 is a sectional view taken along line III-III in FIG.

FIG. 4 is an explanatory diagram showing each cutting resistance generated in the slicing device.

FIG. 5 is an overall side view of a dressing device provided in the slicing device.

6 is a sectional view taken along line VI-VI of FIG.

FIG. 7 is a partial cross-sectional side view of the main body of the dressing device.

FIG. 8A is a graph showing the relationship between the number of workpieces cut when dressing is not applied and the cutting resistance in each direction, and FIG. 8B is the number of workpieces cut when dressing is performed at appropriate timings and in each direction. It is a graph which shows the relationship with cutting resistance.

FIG. 9 is a flowchart showing a control operation performed in the dressing device.

FIG. 10 is a sectional plan view showing a notch formed in a dress stone by a full dressing operation by the dressing device.

FIG. 11A is a sectional plan view showing a state of side-dressing an inner side surface of a cutting blade in the dressing device, and FIG. 11B is a sectional plane view showing a state of side-dressing an outer side surface of the cutting blade in the dressing device. It is a figure.

FIG. 12 is a cross-sectional plan view showing a conventional full-face dressing method.

FIG. 13 is a cross-sectional plan view showing a conventional side dressing method.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 blade 11 cutting edge 11a inner cutting surface of cutting blade 11b outer cutting surface of cutting blade 14 cutting feed means (cutting feed means) 19 dressing device 24 resistance detecting means 30 work 40 drive control unit 62 dress control device (dress control means) 80 Dressing device main body 85 Stepping motor (index feeding means) DS Dress stone

Claims (4)

[Claims] 1. A slicing apparatus having a blade having a cutting edge on its peripheral edge and being driven to rotate during work slicing, by moving the stone relative to the blade in the radial direction while rotating the blade. After dressing the entire cutting edge of the blade by performing a cutting operation to cut the stone to a position before completely cutting the stone and then an extracting operation to relatively move the stone in the opposite direction to the blade, the cutting The stone is relatively moved in the axial direction with respect to the blade to a position at which one side edge of the cut formed in the stone and the cutting edge of the blade face each other, and at this position, the stone is moved relative to the one side edge. A slash characterized by dressing only one side of the cutting edge by performing a cutting operation. Dressing method of cutting edge in icing device. 2. The method of dressing a cutting edge in a slicing device according to claim 1, wherein the cutting operation, the extracting operation, and the stone are axially relative to the blade by a distance larger than a width dimension of the cutting edge. Indexing operation to move and natural number N of 2 or more (N-1)
By repeating the above operation, the entire surface of the cutting edge is dressed (N-1) times, and then the stone is moved relative to the blade in the axial direction by a distance larger than the relative movement distance in the indexing operation up to that time. By performing the cutting operation and the withdrawing operation at this position, the total cutting blade surface N
One piece of the cutting blade by rotating the stone from this position, and then relatively moving the stone in the axial direction relative to the blade by a distance smaller than the width dimension of the cutting blade, and performing the cutting operation at this position. A method of dressing a cutting edge in a slicing device, characterized in that only the side surface is dressed. 3. A slicing device having a blade having a circular cutting edge on the inner circumference and being driven to rotate during work slicing, and a cutting feed means for moving the stone in the radial direction with respect to the blade. , Indexing and feeding means for moving the stone in the axial direction with respect to the blade, and before the complete cutting of the stone by moving the stone in the radial direction relative to the blade while rotating the blade. After dressing the entire cutting edge of the blade by performing a cutting operation to cut the same stone to the position and then an extracting operation to relatively move the stone in the opposite direction to the blade, the cut formed in the stone by the cutting operation To the blade up to the position where one side edge of the blade and the cutting edge of the blade face each other On the other hand, the stone is relatively moved in the axial direction, and the cutting operation is performed on the one side edge portion at this position, so that only one side surface of the cutting edge is dressed, and the cutting feeding means and the index feeding means. Dressing control means for controlling the operation of the cutting blade. 4. A dressing device for a cutting edge in a slicing device according to claim 3, wherein the cutting operation, the extracting operation, and the stone are axially relative to the blade by a distance larger than a width dimension of the cutting edge. Indexing operation to move and natural number N of 2 or more (N-1)
By repeating the above operation, the entire surface of the cutting edge is dressed (N-1) times, and then the stone is moved relative to the blade in the axial direction by a distance larger than the relative movement distance in the indexing operation up to that time. By performing the cutting operation and the withdrawing operation at this position, the total cutting blade surface N
One piece of the cutting blade by rotating the stone from this position, and then relatively moving the stone in the axial direction relative to the blade by a distance smaller than the width dimension of the cutting blade, and performing the cutting operation at this position. A dressing device for a cutting edge in a slicing device, wherein the dressing control means is configured to control the cutting feed means and the indexing feed means so as to dress only the side surface.