JP2543660B2 - Diamond dresser - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a diamond dresser, and more particularly to a technique for obtaining durability and stable dressing performance.

[0002]

2. Description of the Related Art A diamond has a dressing surface embedded with its part exposed, and the dressing of the grinding wheel, that is, dressing and shape, is performed by pressing the dressing surface against the grinding surface of a rotating grinding wheel. A diamond dresser for repairing is known. As a kind of such a diamond dresser, a type in which columnar diamond having a similar cross section in the longitudinal direction is embedded is proposed. For example, Japanese Patent Laid-Open No. 59-214561
That is the diamond dresser described in the publication. According to such a diamond dresser, since the columnar diamond embedded in the dressing surface with one end protruding is used, its cross-sectional shape does not change even if the diamond wears during dressing, Since the dressing conditions do not change, there is an advantage that the dressing can be performed under constant conditions, and the variations in the grinding surface accuracy of the grinding wheel and the variations in the grinding process by the grinding wheel are reduced.

[0003]

By the way, in the conventional diamond dresser as described above, one end of the columnar diamond is held in a state of protruding from the dressing surface of the main body holding the columnar diamond. When the tip is brought into contact with a rotating grinding wheel, the diamond is prone to damage such as breakage or breakage, and lacks in durability, and stable dressing may not be obtained due to breakage or breakage. was there. In addition, on the other hand, multiple pillars
The diamond-shaped diamond out of the four sides that make up the rectangular cross section
The two sides on the upstream side and the downstream side of the
Are arranged in the direction of friction so that
Same as the flat dressing surface that is the end surface of the sing body
However, in such a case, the columnar
If the diamonds are too close together, the flow of crushed abrasive grains
Because it is difficult to form enough between pillar diamonds
Clogs and burns are more likely to occur, and columnar diamonds on the contrary
If the interval between the and is too wide, the polishing efficiency as a multi-stone dresser
There was a drawback that it was difficult to obtain enough .

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a diamond dresser having stable dressing performance and durability.

[0005]

The gist of the present invention for achieving such an object is that it is substantially the same in the longitudinal direction.
Columnar diamond single crystal having a rectangular sectional shape as is, the upstream side and among the four sides constituting the rectangular cross-section
Make sure that the two downstream sides are at right angles to the friction direction.
A plurality of pieces are embedded along the friction direction and at least the two
Direction sides has a flat dressing surface, the diamond dresser form dressing the grinding wheel is pressed against the grinding surface of the grinding wheel and the flat-de <br/> Lessing surface, the columnar diamond, the columnar Ri Do the same plane at the end face is the dressing surface of the diamond,且
The mutual spacing of the columnar diamonds is
1.5 to 4.5 times the size of the band in the direction of friction
It is embedded in the metal body in an exposed state so as to be inside .

[0006]

[Effect of the action and the Invention Thus, the columnar diamond single crystal, its end face Ri Do the same surface in the dressing surface, and the mutual spacing of the columnar diamond grinding
Since it was embedded in the metallic body in a state of being exposed to so that such a range of 1.5 to 4.5 times the rubbing direction of the dimension, the grinding time of dressing tip of the pillar-shaped diamond grinding wheel during rotation Even if the columnar diamond is brought into contact with the surface, the columnar diamond is prevented from being broken or broken. Therefore, it is possible to suitably suppress the deterioration of the durability and the instability of the dressing performance due to the loss or breakage of the columnar diamond. Also,
The mutual spacing between pillar-shaped diamonds
Within 1.5 to 4.5 times the dimension in the friction direction of
Since it is buried like
The flow of the abrasive grains of the grinding wheel crushed by the collision with the edge
Both sides of the columnar diamond from the upstream side in the friction direction
Since the width of the groove formed up to
The dressing performance can be maintained.

[0007] Preferably, the columnar diamond, the
The wear resistance of the columnar diamond is
It is arranged so as to be parallel to the lessing direction. This
If so, the durability of the diamond dresser is suitably high.
Can be

[0008]

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

The blade type dresser 10 shown in FIG. 1 has a cylindrical shank portion 12 which is held by a holder 26 of a dressing device which will be described later, and a flat plate-like element which is formed integrally from the shank portion 12 in the axial direction. Dressing part 1
A metal body is composed of 4 and. The dressing portion 14 is provided with a flat dressing surface 16 at the tip, and is formed in a thick plate shape as a whole. And
With the cross-sectional shape of similar rectangles in the longitudinal direction, that
2 on the upstream side and the downstream side of the four sides forming the quadrangle
The sides are at right angles to the direction of friction of the dressing surface 16.
And its end surface is substantially the same as the dressing surface 16.
A plurality of wires (in this embodiment
4 pieces of columnar diamonds 18 are dressing parts 1
It is buried in 4. FIG. 2 shows the columnar diamond 18
The dressing surface 16 is shown with its end face exposed.

The columnar diamond 18 is cleaved from a single crystal synthetic diamond into a plate shape and cut by using a laser beam, so that the end face of the (1,1,0) face and the (1,1,1) face are formed. ) Plane and a pair of side surfaces of the (2,1,1) plane which are parallel to each other, and are arranged so that the end surfaces are parallel to each other in a state of being located on one plane,
It is buried by the sintered metal 20. Moreover, the columnar diamonds 18 are arranged at mutual intervals so as to maintain suitable dressing performance. The columnar diamond 18 has outer dimensions of, for example, about 0.6 mm ^W × 0.6 mm ^T × 3 mm ^L , and the mutual distance D (center-to-center distance) between them is 2.
It is set to about 0 mm. In the experiments conducted by the inventors of the present invention, the mutual distance D is within a range of 2 to 4 times the dimension of the columnar diamond 18 in the friction direction, that is, 0 in the mutual clearance.
It has been confirmed that when set within the range of 6 mm to 2.0 mm, suitable dressing performance can be obtained. If it is 1.5 times or less, clogging and burning of the dresser are likely to occur,
If it exceeds 4.5 times, the dressing performance efficiency will decrease and the characteristics as a multi-stone dresser will be impaired.

As shown in FIG. 3, the blade type dresser 10 constructed as described above is used as a blade type dresser 10.
However, the array surface of the columnar diamonds 18 has a grinding wheel 22.
While being held by the holder 26 in a posture perpendicular to the rotation axis of, the dressing surface 16 is pushed toward the grinding surface of the grinding wheel 22 by an amount corresponding to a predetermined cut amount. The grinding surface of the grinding wheel 22 is a cylindrical grinder,
The surface grinder and centerless grinder are rotated at a peripheral speed of 30 to 50 m / sec, the lapping machine is 3 to 4 m / sec, and the double-sided surface grinder and the inner surface grinder are rotated at a peripheral speed of about 30 m / sec. The dresser 10 is moved in the direction parallel to the rotation axis of the grinding wheel 22 at a constant speed by the width dimension of the grinding surface for one-way stroke or reciprocating stroke. As a result, the outer peripheral shape of the grinding surface of the grinding wheel 22 is adjusted with high accuracy, and at the same time, the grinding performance of the grinding wheel 22 is restored.

4 and 5 show the front and cross-section of the blade dresser 10 after it has been used for dressing as described above. In the figure, the arrow indicates the friction direction of the outer peripheral surface of the grinding wheel 22, and the flow of the abrasive grains crushed by the collision with the tip of the columnar diamond 18 leads from the upstream side in the friction direction of the columnar diamond 18 to both sides thereof. A groove 28 is formed. The groove 28 is deep on the upstream side of the columnar diamond 18, and becomes shallower suddenly in the process of reaching both sides thereof, and then further shallower toward the downstream side. The groove 28 represents the flow of abrasive grains in the dressing process as a result. If the gap between the columnar diamonds 18 is small, the width of the groove 28 is not sufficiently formed, and the dressing performance is impaired. The lower limit of the gap range in the frictional direction of the columnar diamond 18 is determined for this reason.

In such a dressing process,
The end surface of the columnar diamond 18 scrapes off the abrasive grains and the binder on the surface of the grinding wheel 22 and crushes the abrasive grains. At the same time, the sintered metal 20 constituting the end portion of the columnar diamond 18 and the dressing portion 14 is also broken. It is abraded and the dressing surface 16 is retracted.

In the blade type dresser 10 of the present embodiment, even if the dressing surface 16 is retracted as described above, the end face shape of the columnar diamond 18 does not change, and there is no shedding compared with the granular diamond. During the consumption process of the blade type dresser 10, the grinding wheel 2 may be changed due to the change of dressing performance or the shedding of diamond.
It is possible to solve the problem that the unevenness of the second ground surface is generated or the accuracy of the ground work is lowered.

Further, in the blade type dresser 10 described above,
The end surface becomes the same surface on the dressing surface 16 ,
Moreover, the mutual distance between the columnar diamonds 18 is the dimension in the friction direction.
Since it is embedded in the metal body in an exposed state so as to be within the range of 1.5 to 4.5 times, the tip of the columnar diamond 18 contacts the grinding surface of the rotating grinding wheel 22 during dressing. The columnar diamond 18 is formed so that the end face thereof is flush with the dressing face 16 even if it is made to move.
Is embedded in the metal body, the columnar diamond 18 is prevented from being broken or broken. Therefore, it is possible to suitably suppress the deterioration of the durability and the instability of the dressing performance due to the loss or breakage of the columnar diamond 18. Also,
Since the columnar diamond 18 is embedded in the metal body so that the end surface is flush with the dressing surface 16, since the metal body is in contact with the grinding wheel from the beginning, the grinding caused by the change in the dressing condition is performed. Variations in the grinding surface accuracy of the grinding wheel and the grinding processing accuracy of the grinding wheel are eliminated, and stable dressing performance can be obtained. Furthermore, the mutual spacing of the columnar diamonds 18 is
The dimension of the columnar diamond 18 in the friction direction is 1.5 to
Is it buried so that it is within the range of 4.5 times?
Crushed by collision with the tip of the columnar diamond 18.
By the flow of the abrasive grains of the grinding wheel 22
Formed from the upstream side to both sides of the columnar diamond 18.
Since the width of the groove 28 to be formed is sufficiently formed, a suitable dresser is formed.
Singing performance can be maintained.

Next, another embodiment of the present invention will be described. In the following description, the same parts as those in the above-described embodiment will be designated by the same reference numerals and the description thereof will be omitted.

According to the experiments conducted by the present inventors, the columnar diamond 18 which is cut so that the (1,1,0) plane of the single crystal is exposed as an end face is shown in FIG. 6 (a) or (b). It was found that there is an easy wear direction indicated by the solid arrow and a wear resistant direction indicated by the broken arrow as shown in FIG. From this, as shown in FIG. 7 , the blade dresser 10 is set so that the wear-resistant direction indicated by the broken line arrow is as parallel as possible to the arrangement direction of the columnar diamonds 18, that is, the dressing direction with respect to the grinding surface. You may comprise. In this way, the blade type dresser 10
The durability of is improved suitably.

Further, as shown in FIG. 8 , the columnar diamond 18 may be cut so that the wear resistance direction indicated by the broken line arrow coincides with the arrangement direction. The wear-resistant direction can be relatively easily confirmed from the state of occurrence of streaks on the end face when the end face of the columnar diamond 18 is pressed against a rotating grindstone or against another rotating body. Since the diamond 18 is not processed with high accuracy, its wear resistance direction cannot be specified with high accuracy. Therefore, the wear resistance direction indicated by the broken line in each figure includes a variation of, for example, several degrees to ten degrees.

FIG. 9 shows a usage state of the rotary dresser 30 to which the present invention is applied. In the figure, the rotary dresser 30 has a disk shape as a whole, and is attached to a rotary shaft of a rotary drive device 32. Rotary drive 32
Is disposed such that its rotation axis is parallel to the rotation axis of the grinding wheel 22 and is movable in a direction parallel to the rotation axis. When dressing the grinding wheel 22,
The rotary driving device 32 rotationally drives the rotary dresser 30 while rotating the annular dressing surface 46 provided on the outer periphery of the rotary dresser 30.
The rotary dresser 3 is pressed against the grinding surface of 2
0 is moved in one direction or reciprocatingly in a direction corresponding to the width of the grinding surface in a direction parallel to the rotation axis.

The rotary dresser 30 is manufactured, for example, as follows. First, a disk-shaped main body 34 having the cross-sectional shape shown in FIG. 10 is prepared. On the outer peripheral edge portion of the main body 34, an annular recess 40 having a peripheral surface 36 parallel to the rotation axis and a flange surface 38 perpendicular to the rotation axis is formed. Then, a large number of columnar diamonds 18 are radially arranged on the flange surface 38 at predetermined intervals. When arranging the columnar diamond 18, the columnar diamond 18 is fixed by an adhesive material in order to stabilize the arrangement position or the arrangement posture. In this case, on the flange surface 38,
A groove for positioning or stabilizing the posture of the columnar diamond 18 may be formed in advance, and the groove may be used for fixing. Then, a nickel plating layer 42 is formed on the flange surface 38 by nickel electroplating, and columnar diamonds 18 are embedded in the nickel plating layer 42, as is often done when manufacturing electrodeposited products.
FIG. 11 shows this state. The Figure 1 the shape of the nickel plating layer 42 is by grinding or polishing
After being arranged as shown in FIG. 2 , a resin 44 is filled in the recess to finish the shape. FIG. 13 shows this state. The nickel plating layer 42 and the resin 44 are used.
Alternatively, a sintered metal or a brazing material may be used.

On the outer peripheral surface of the rotary dresser 30 constructed as described above, that is, on the dressing surface 46, the columnar diamond 18 has its end surface substantially flush with the dressing surface 46, and the mutual spacing between the columnar diamonds 18 is
Since it is exposed so as to be 1.5 to 4.5 times the dimension of the columnar diamond 18 in the friction direction, the same effects as those of the blade-shaped dresser 10 described above can be obtained. Arranged by. For example, the figure
14 shows the FIG. 7 or FIG. 8 and an example of a rotary dresser 30 where the columnar diamond 18 are arranged in the same manner, respectively.

FIG. 15 shows a cup-shaped rotary dresser 5
An example of 0 is shown. The rotary dresser 50 includes a main body 52 having a bottomed cylindrical shape, and a large number of columnar diamonds 18 embedded in an annular dressing surface 54 inclined by an angle θ with respect to the outer peripheral surface of the main body 52. There is. For example, when the angle θ is 45 °, the columnar diamonds 18 are arranged along lines intersecting the rotation axis of the rotary dresser 50 at an angle of 45 °. FIG. 16 also shows an example of the cup-shaped rotary dresser 58. The rotary dresser 58 includes a main body 60 having a bottomed cylindrical shape, and a large number of columnar diamonds 18 embedded in an annular dressing surface 62 that is an end surface of the main body 60. In this embodiment, the columnar diamond 18 is arranged parallel to the axis of rotation.

Although one embodiment of the present invention has been described above with reference to the drawings, the present invention can be applied to other modes.

For example, in the above-mentioned embodiment, the blade-shaped dresser 10 is a type in which four columnar diamonds 18 are arranged in parallel on one plane, and the type in which a large number of columnar diamonds 18 are arranged on the annular outer peripheral surface. The rotary dresser 30 has been described, but the external dimensions are, for example, 0.3 to 1.7 mm ^W x 0.3 to 1.7 mm ^T x 1 to 6.
It can be selected from the range of about mm ^L according to the grinding wheel to be dressed. Further, the columnar diamond 18 may be different in number, or may be another type of dresser such as a multi-row type multi-stone dresser in which a plurality of columnar diamonds 18 are arranged in multiple stages.

Further, the dressing surface 1 of the above-mentioned embodiment
In each of 6, 46, 54 and 62, the columnar diamonds 18 are arranged in one line in the straight or circumferential direction, but they may be arranged in three or more lines.

Further, the dressing surface 1 of the above-mentioned embodiment
Although 6, 46, 54 and 62 were formed in a straight line or an annular shape, when the grinding wheel has a full-scale grinding surface,
A dressing surface having a shape corresponding to the complex grinding surface of the mold may be formed. The dressing surface of such a full-dresser can also be configured by embedding a large number of columnar diamonds 18 with the end faces exposed.

Further, in the above-mentioned embodiment, the columnar diamond 18 is fixed by the sintered metal 20 or the electrically deposited nickel plating layer, but it may be fixed by another method.

Further, the columnar diamond 1 of the above-mentioned embodiment
Although 8 was a synthetic diamond, it may be a sintered diamond or a natural single crystal diamond.

The above description is merely one embodiment of the present invention, and the present invention can be variously modified without departing from the spirit thereof.

[Brief description of drawings]

FIG. 1 is a perspective view showing a blade type dresser according to an embodiment of the present invention.

2 is a diagram showing the dressing surface of FIG. 1. FIG.

FIG. 3 is a diagram illustrating a dressing operation.

FIG. 4 is a front view of a dressing surface after it has been used for dressing.

FIG. 5 is a diagram showing a cross section of a dressing surface after being used for dressing.

6A and 6B are diagrams showing crystal plane orientations, and FIG. 6B is a diagram showing crystal axis directions related to wear resistance on each surface of the columnar diamond used in the dresser of FIG. is there.

FIG. 7 is a view corresponding to FIG. 2 showing another embodiment of the present invention.

FIG. 8 is a view corresponding to FIG. 2 showing another embodiment of the present invention.

FIG. 9 is a diagram illustrating a usage state of a rotary dresser according to another embodiment of the present invention.

FIG. 10 is a diagram illustrating a manufacturing process of the rotary dresser of FIG.

FIG. 11 is a diagram illustrating a manufacturing process of the rotary dresser of FIG. 9.

FIG. 12 is a diagram illustrating a manufacturing process of the rotary dresser of FIG. 9.

FIG. 13 is a diagram illustrating a manufacturing process of the rotary dresser of FIG. 9.

14 is a diagram showing an array example of columnar diamonds on the dressing surface of the rotary dresser of FIG.

FIG. 15 is a view showing a cup-shaped rotary dresser which is another embodiment of the present invention.

FIG. 16 is a view showing a cup-shaped rotary dresser that is another embodiment of the present invention.

[Explanation of symbols]

 10: Blade type dresser (diamond dresser) 16, 46, 54, 62: Dressing surface 18: Columnar diamond 22: Grinding wheel 30: Disc-shaped rotary dresser 50, 58: Cup-shaped rotary dresser

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Yasuhiro Michikura 8-9, Moji, Tokikoi-cho, Muko-shi, Kyoto Prefecture (56) References JP-A-59-30668 (JP, A) Sho 55-7658 (JP, U)

Claims (2)

(57) [Claims] 1. A rectangular cross-sectional shape that is substantially the same in the longitudinal direction.
Columnar diamond single crystal having a can structure the said rectangular cross-section
Of the four sides formed, the two sides on the upstream side and the downstream side rub
Multiple pieces along the friction direction so that they are at right angles to the direction
In a diamond dresser of a type that is embedded and has a dressing surface that is flat in at least two sides , and presses the flat dressing surface against the grinding surface of the grinding wheel to dress the grinding wheel. the columnar diamond, Ri Do flush end face of the columnar diamond at said dressing surface, and, pillar
The mutual spacing of the diamond-shaped diamonds is
A diamond dresser, which is embedded in a metal body in an exposed state so as to be within a range of 1.5 to 4.5 times the dimension in the friction direction . 2. The columnar diamond is the columnar diamond.
Dressing of the grinding surface depending on the wear resistance of the mond
The diamond dresser according to claim 1, wherein the diamond dresser is arranged so as to be parallel to the direction .