JPH08318465A - Diamond dresser - Google Patents

Abstract

PURPOSE: To improve the wear resistance and to stabilize the dressing function by forming the dressing face of a columnar diamond on the face with the largest wear resistance, and embedding the diamond in a dresser body with the angle of tiltation relative to the grinding surface of a grinding wheel so that the surface is the dressing face. CONSTITUTION: The vertical faces of a columnar diamond 1 are the face (111) which are parallel to each other, and the side faces are the faces (211) parallel to the other, and the end face is cut with the angle of about 60 deg. to the longitudinal direction of the column and with the angle of 23 deg. to the perpendicular plane to the side to form the face (111). The columnar diamond is embedded in a dresser body 3 so that the dressing face is the face (111) which is most difficult to wear. As a result, the wear resistance of the dressing face is excellent, the service life of the dresser is improved, and the stability of the dressing function can be increased.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a diamond dresser using columnar diamond.

[0002]

2. Description of the Related Art A diamond dresser for dressing a grinding wheel by pressing a dressing surface with a part of a diamond exposed to a grinding surface of a rotating grinding wheel is known, and the diamond is embedded in a sintered metal or the like. The dressing portion is attached to the tip of the shank, or is attached to the outer peripheral surface of the disk-shaped base body or the end surface of the cylindrical base body, and has been widely used as a plate-type dresser or a rotary dresser.

However, in the above-mentioned conventional diamond dresser, since the diamond to be buried in the dressing surface is generally a granular diamond, the size is not constant and the diamond diamond wears during use. However, there are problems that dressing conditions may change due to changes in the cross-sectional shape of the granular diamond, and the dressing function may become unstable due to grain removal of the granular diamond itself, causing the grinding surface of the grinding wheel to become rough. It was

Therefore, in order to solve the above problem, attention is paid to a single crystal columnar diamond having a substantially similar cross-sectional shape in the longitudinal direction, and the columnar diamond 11 is replaced with a dresser body, for example, a shank as shown in FIG. As shown in FIGS. 7 (a) and 7 (b), a diamond dresser has been proposed in which the dressing portion 13 at the tip of 12 has a rectangular shape or a diagonal line arrangement at regular intervals. (Patent Fair 6-696
(See Japanese Patent No. 66)

[0005]

However, the diamond dresser according to the above-mentioned proposal is very useful in the use of columnar diamond in terms of improving the performance of the dresser using the conventional granular diamond described above. Since the diamond array surface is held by the holder in a posture in which the diamond grinding wheel is at a right angle to the rotation axis of the grinding wheel, the end surface of the columnar diamond, which is the dressing surface, is the most easily polished (110) surface, shortening the life of the dresser and dressing. There was a problem of causing instability in the function.

The present invention addresses the above-mentioned situation, uses the above columnar diamond, and is abrasion resistant (111).
The purpose of the present invention is to improve the wear resistance of the dresser by finding that the surface is a dressing surface, to prolong the life and to stabilize the dressing function.

[0007]

That is, the feature of the present invention which meets the above object is that the dressing surface of the columnar diamond has the most abrasion resistance in the diamond dresser in which the columnar diamond is embedded in the dresser body.
1) The surface is formed, and the columnar diamond is embedded in the dresser main body with an inclination angle with respect to the grinding surface of the grinding wheel so that this surface becomes the dressing surface.

Here, the columnar diamond whose dressing surface is formed on the (111) surface having the highest abrasion resistance is cleaved from a single crystal synthetic diamond into a plate shape and further cut by a laser beam to form a (110) surface. A columnar diamond having an end face and a pair of side faces of the (111) face and the (211) face which are parallel to each other is obtained.
1) A cut surface obtained by cutting with the surface as the upper surface in the longitudinal direction of the column at a predetermined inclination angle, preferably 60 ° ± 10 ° and 23 ° ± 3 ° with respect to the vertical surface of the side surface. Is the (111) plane.

The invention according to claim 4 is a blade-type dresser in which a columnar diamond having the (111) face as the end face is embedded in a dresser body continuous to a shank, and the invention according to claim 5 is the end face ( This is a rotary dresser in which a columnar diamond having a (111) surface is embedded in a disk-shaped or cylindrical dresser body.

In any of the above cases, however, the exposed cross-sectional shape of the columnar diamond having the exposed end surface as the (111) plane may be rectangular or rhombic with respect to the grinding direction, and one row may be formed. However, the number of rows may be plural. Further, in the case of a plurality of rows, a staggered arrangement may be used.

[0011]

In the present invention, as described above, the end face is the most difficult to wear (1
11) Since the columnar diamond formed on the surface is embedded at an inclination angle with respect to the grinding surface of the grinding wheel so that the surface is exposed, the dressing surface is not easily worn (111)
Surface, increasing the life of the dresser and stabilizing the dressing function.

Moreover, since the columnar diamonds are arranged so as to be inclined, it is possible to use the dresser in different directions by changing the direction of the dresser and reversing it, and in the direction in which the surface roughness is improved and the finish is improved. , Increase usability.

[0013]

Embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows a columnar diamond 1 according to the present invention.
The upper and lower surfaces are parallel (111) surfaces and the side surfaces are parallel (211) surfaces, and the end surfaces are at an angle of about 60 ° with respect to the longitudinal direction of the column, and the side surfaces are perpendicular to each other. Cut at an angle of 23 ° to the face (111)
Is formed on the surface.

The columnar diamond as a raw material is provided by cleaving a single crystal synthetic diamond into a plate shape and cutting it with a laser beam. The end faces become (110) faces and the side faces become (111) faces and (211) faces. It is composed of a pair of surfaces parallel to each other. Then, this columnar diamond has the inclination angle in the longitudinal direction of the column as shown in FIG. 1 and is cut at an inclination angle with respect to the vertical surface of the side surface to become the above-mentioned columnar diamond 1 of the present invention, and the cut surface is (11
1) It becomes a surface. Of course, it may be easier to grind or cut the end face from the uncut face. The pillar-shaped diamond 1 according to the present invention is arranged in a rhombic cross-section so that the exposed cross-section upon embedding in the dresser body is a rectangular cross-section as shown in FIGS. 7A and 7B, or a diagonal is parallel to the longitudinal direction of the dressing surface. It However, the cross-sectional shape of the columnar diamond is not limited to the rectangular shape or the rhombic shape, and may be a different shape such as a circular shape, a polygonal shape, or a star shape.

Further, the arrangement is not limited to one row arrangement, but may be plural rows arrangement of two rows or more, and in the case of two rows or more, they may be arranged in a staggered arrangement.

On the other hand, the columnar diamond 1 according to the present invention
It is necessary that the end surface of the column has an inclination angle with respect to the column longitudinal direction and the vertical surface of the side surface, and the inclination angle cut with an inclination with respect to the column longitudinal direction and the vertical surface of the side surface is basically the former. 60 ° and the latter is practically 22 ° 47′51 ″.

However, considering that there are variations,
It is preferable to allow an allowable range of ± 10 ° for the former and ± 3 ° for the latter.

2 to 4 are examples of diamond dressers using the above-mentioned columnar diamond, and FIGS.
Shows a blade dresser, while FIG. 4 shows a rotary dresser. 2 and 3, the columnar diamond 1 is embedded in the dressing portion 3 continuous with the shank 2 and is pressed against the grinding surface of the grinding wheel 4. In this case, the columnar diamond 1 is gripped at a predetermined inclination angle with respect to the grinding surface of the grinding wheel 4, that is, at an angle of 60 ° ± 10 °, and the grinding wheel 4 has an amount corresponding to a predetermined grinding amount. It is pushed toward the grinding surface.

FIG. 4 shows a rotary dresser in which the columnar diamonds 1 are arranged on the outer circumference, and in this case also, the disk-shaped or cylindrical dresser main body 5 is embedded in an inclined manner in the radial direction.

When the pillar-shaped diamond 1 is buried, the direction of the dresser can be reversed as shown in FIGS. 5 (a) and 5 (b). In the case of (a), the rake angle is small and the sharpness is sharp. On the other hand, in the case of (b), a negative rake angle is obtained and a good finished surface can be formed. Therefore, the direction of the dresser can be changed appropriately according to the purpose.

Next, the dresser according to the present invention is compared with a dresser in which conventional columnar diamonds are arranged in a direction perpendicular to the rotation axis of the grinding wheel, and both the blade type and the rotary type are compared under the same conditions and ground. The dresser according to the present invention had much better durability, and a life of 2 to 4 positions was recognized as compared with the comparative dresser.

[0023]

As described above, according to the present invention, the columnar diamond is embedded in the dresser body so that the dressing surface is the (111) surface which is the most difficult to wear. Therefore, the dressing surface is arranged in the direction perpendicular to the grinding surface of the grinding wheel. Compared with the dresser provided, the dressing surface has better wear resistance, has the effect of extending the life of the dresser and increasing the stability of the dressing function.

Further, in the present invention, the columnar diamond is embedded with a slanting angle with respect to the longitudinal direction of the column and the vertical surface of the side face and at an inclination angle with respect to the grinding surface of the grinding wheel. It is possible to selectively use the better direction and the direction to improve the surface roughness, and there is an advantage that the usability is improved as compared with the prior art.

[Brief description of drawings]

FIG. 1 is an inclined view showing an example of a columnar diamond used in the present invention.

FIG. 2 is a schematic side view of a blade type dresser using the columnar diamond.

FIG. 3 is a schematic plan view of the blade type dresser.

FIG. 4 is a partial schematic view of a rotary dresser using the columnar diamond shown in FIG.

5 (a) and 5 (b) are views showing an inverted attachment mode of a columnar diamond according to the present invention.

FIG. 6 is a perspective schematic view of a known blade type dresser using columnar diamond.

7 (a) and 7 (b) are diagrams showing respective arrangements of dressing surfaces of columnar diamonds.

[Explanation of symbols]

 1 columnar diamond 2 shank 3 dressing part 4 grinding wheel 5 disk-shaped or cylindrical dresser body

Claims (5)

[Claims] 1. A diamond dresser in which single-crystal columnar diamond is embedded in a dresser body with a part of the columnar diamond exposed on the dressing surface, and the dressing surface of the columnar diamond is the most abrasion resistant (111) plane. And the columnar diamond is embedded in the dresser body by inclining the columnar diamond with respect to the grinding surface of the grinding wheel so that the surface becomes a dressing surface. 2. The dressing surface has the most abrasion resistance (1
The columnar diamond formed on the (11) plane is cleaved from a single crystal synthetic diamond into a plate shape and further cut by a laser beam to obtain an end surface of the (110) plane,
A columnar diamond having a pair of (111) planes and (211) planes parallel to each other has a predetermined inclination angle in the column longitudinal direction with the (111) plane as an upper surface and has a predetermined plane with respect to the vertical plane of the side surfaces. The diamond dresser according to claim 1, wherein the cut surface is a (111) surface by cutting at an angle. 3. The inclination angle of the column longitudinal direction is 60 ° ± 10 °
And the inclination angle of the side surface with respect to the vertical plane is 23 ° ± 3
The diamond dresser according to claim 2, wherein 4. The diamond dresser according to claim 1, wherein the dresser body is a blade type dresser body which is continuous with a shank. 5. The diamond dresser according to claim 1, wherein the dresser body is a disk-shaped or cylindrical rotary dresser body.