JPH1148140A - Blade grinding device of porous diamond cutting blade and its method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To properly grind a blade even of a diamond tool constituting a porous diamond cutting blade by laminating diamond grains. SOLUTION: A blade grinding device of a porous diamond cutting blade 31 formed by holding and laminating diamond grains on a connecting part of a small contact point is constituted as a blade grinding device 21, of the porous diamond cutting blade 31 of a rotating contact part 22 abutting to the porous diamond cutting blade; a pressurizing mechanism 23 to pressurize stress higher than rupture strength of a connecting part of the porous diamond cutting blade 31; a work rotating body 33 to hold the diamond cutting blade 31 free to revolve; and a revolving mechanism 40 to revolve at least one of the rotating abutting part 22 and the work rotating body 33.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sharpening structure for a diamond cutting tool having a diamond grain cutting blade for cutting, polishing, cutting, drilling or excavating various workpieces such as metal materials. In particular, the present invention relates to an apparatus and a method for sharpening a porous diamond cutting blade formed by laminating diamond grains.

[Prior art]

In general, when sharpening a grinding wheel tool, truing, dressing, or clogging is performed by means of a single-stone dresser, a multi-stone dresser, an impregnated dresser, a block dresser, or a rotary dresser. .

As shown in FIG. 6, it is known that, for example, when a diamond grindstone 50 is sharpened, an operation is performed using a block dresser 62. When the block dresser 62 is used, a dresser mechanism 6 configured by fixing the block dresser 62 on the upper surface of a table 61 movably provided in the direction of the arrow.
Used as 0.

A diamond cutting blade 51 of a diamond wheel 50 is provided in a groove portion of the block dresser 62.
Are held so as to be in contact with each other, and the center hole portion of the substrate 52 of the diamond wheel 50 is held by a rotation holding mechanism 53 and rotated at a constant speed. Further, the table 61
Is moved in the direction of the arrow to sharpen the diamond cutting blade 51 of the diamond wheel 50.

[0005] Currently, diamond cutting blades formed by laminating diamond grains with a small contact point at the bond portion are being developed, and exhibit the properties of diamond such as insulation, heat dissipation and thermal conductivity. By that, Fe
There has been proposed a diamond tool capable of cutting a steel material while minimizing the problem of the reaction between (iron) and C (carbon). When the porous diamond cutting blade on which the diamond grains are laminated is sharpened, the sharpening cannot be performed with a diamond whetstone or a diamond dresser.

In the conventional blade sharpening means, when the density of diamond grains at the cutting edge is lower than the density of the bond, the defective cutting edge is dropped by consuming the bond and the cutting edge surface is reduced. It works effectively by measuring the regeneration of the diamond.However, when the diamond grains are larger than the bond density, such as a porous diamond cutting blade in which diamond grains are connected by small contact bonds, the blade sharpening means side It was worn and could not be properly sharpened.

[0007]

However, if the porous diamond cutting blade is used without sharpening the blade, the work such as grinding or cutting of an appropriate workpiece cannot be performed, and the porous diamond cutting blade cannot be used. In some cases, it was damaged.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has a diamond blade capable of appropriately sharpening a diamond tool having a porous diamond cutting blade formed by laminating diamond grains. It is an object to provide a sharpening device and a method thereof.

[0009]

In order to achieve the above-mentioned object, the present invention provides a blade sharpening apparatus for a porous diamond cutting blade formed by laminating and stacking diamond grains at connection portions of small contacts. A rotary abutting portion that abuts against the porous diamond cutting blade, a pressing mechanism that presses a stress higher than a breaking strength of the connecting portion of the porous diamond cutting blade, and a work that rotatably holds the diamond cutting blade A rotating body,
A blade sharpening device for a porous diamond cutting blade is constituted by the rotating contact part and a rotating mechanism for rotating at least one of the workpiece rotating body.

A first step of rotating a diamond tool having a porous diamond cutting blade formed by laminating and laminating diamond grains at a connection portion of a small contact, and bringing a rotary contact portion into contact with the diamond tool. And a method of sharpening the surface of the porous diamond cutting blade by applying a stress higher than the breaking strength of the connecting portion to the rotating body.

Further, there is provided a blade sharpening device for a porous diamond cutting blade of a diamond tool formed by laminating diamond grains, wherein the contact portion is in contact with the porous diamond cutting blade, and the contact portion is formed by ultrasonic vibration. The porous diamond cutting blade was provided with a vibrating means for vibrating and a rotating means for rotating the diamond tool.

[0012] Then, a diamond tool having a porous diamond cutting blade formed by holding the diamond grains at the connecting portions of the small contacts is rotated by rotating means, and the porous diamond cutting blade is brought into contact with the contact portion vibrated by ultrasonic vibration. ,
The present invention was configured as a method for sharpening a porous diamond cutting blade, which is brought into contact with the porous diamond cutting blade in a width direction at a constant pressure.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a front view of a main part showing a blade sharpening device for a porous diamond cutting blade, and FIG.
(B) is a principle diagram showing an operating state of a blade sharpening device for a porous diamond cutting blade. FIG. 3 is a perspective view showing a main part of a blade sharpening device for a diamond cutting blade showing another embodiment.
5A and 5B are principle diagrams showing the principle of the blade sharpening operation of the porous diamond cutting blade, and FIGS. 5A and 5B are principle diagrams showing the working angle of the contact portion of the porous diamond cutting blade.

As shown in FIG. 1, a porous diamond blade sharpening device 21 includes a work rotating body 33 rotatably supporting a work 30 which is a porous diamond tool, and a rotary abutment abutting on the work 30. Part 22 and a pressing mechanism 2 for pressing the rotary contact part 22 against the work with a predetermined pressure.
3 and a rotating mechanism 40 for rotating at least one of the work rotating body 33 and the rotating contact part.

The work rotating body 33 comprises a fixing part 34 for detachably fixing the substrate 32 side of the work 30 and a rotating shaft 35 for supporting the fixing part 34. The rotating contact portion 22 is rotatably supported, and applies a stress higher than the breaking strength of the connection portion 31b (see FIG. 2) of the porous diamond 31 of the work 30 by the pressing mechanism 23. It has a hydraulic cylinder mechanism for pressing.

The work rotating body 33 and the rotating contact part 2
Numeral 2 is configured to rotate at a predetermined speed by driving a drive motor or the like of the rotating mechanism 40, and is configured to rotate in opposite directions as shown in FIG. The work rotator 33 and the rotation contact portion 22
Are in contact with each other at a predetermined pressure, so that one of them may be rotated by the rotating mechanism 40 and the other may be driven to rotate.

Therefore, as shown in FIGS. 2A and 2B, when performing the blade sharpening work of the work 30 by the work rotating body 33 and the rotating contact portion 22, first, the work 3 is sharpened.
The work 30 is mounted on the rotating shaft 35 while the substrate 32 portion of the “0” is fixed by the fixing portion 34. Then, in a state where a stress higher than the breaking strength of the connection portion 31b for connecting the diamond grains 31a of the work 30 with the small contacts is applied by the pressing mechanism 23,
The work rotating body 33 and the rotating contact part 22 are rotated by the rotating mechanism 40. Therefore, as shown in FIG. 2B, the rotating contact portion 22 can break the connecting portion 31b of the diamond grain 31a and perform the sharpening operation of the porous diamond 31.

Although FIG. 2 shows the shape of the diamond grains 31a in a spherical shape, the diamond grains 31a are originally composed of polyhedrons such as tetrahedron, hexahedron, octahedron, and dodecahedron. Are arranged in different directions.

Next, a second embodiment of the present invention will be described. As shown in FIG. 3, the blade sharpening device 1 includes a porous diamond cutting blade 11 of a laminated diamond grindstone 10.
Abutment portion 2 that abuts on contact portion, holding portion 3 that holds this abutment portion 2, main body portion 5 including holding portion 3, and main body portion 5
And a connecting cord 6 on the contact portion 2 side.
And an oscillator 7 that transmits oscillations via the oscilloscope. In addition, the main body 5 is configured to include a longitudinal vibration magnetostrictive vibrator, and is configured to vibrate the contact portion 2 back and forth with respect to the axial direction. The contact part 2 is made of a cemented carbide, and its tip is 0.3 to 1.0 [m
m] is convenient.

As shown in FIGS. 3 and 4, the laminated diamond grindstone 10 rotatably holds a substrate 12 by a holding and rotating mechanism 13, and a porous diamond cutting blade 11 provided on a peripheral edge of the substrate 12 is provided. The blade sharpening device 1 is disposed at a position facing the contact portion 2.

When the grinding operation is performed on the laminated diamond grindstone 10 using the blade sharpening device 1, as shown in FIG. 3 and FIG. A frequency is given in the range of [kHz] to 30 [kHz], and the contact portion 2 has an amplitude of 0.001 to 0.002 [inc.
h). And, the contact portion 2 is positioned 1 mm away from the laminated porous diamond cutting blade 11.
The adjustment is performed so that the contact is made at a pressure of about 2 [lb / inch]. The frequency is 10 which is a low frequency.
Performing at [kHz] is convenient.

With the laminated diamond wheel 10 being rotated at a low speed by the holding and rotating mechanism 13, the contact portion 2 is applied with a pressure of 1 to 2 [lb / inch] and an amplitude of 0.001 to 1 [lb / inch].
When the diamond particles 11a come into contact with the diamond particles 11a in an ultrasonic vibration state of 0.002 inch, the diamond particles 11a
Are microscopically damaged and sharpened by phenomena such as cleavage and sharp cleavage in the crystal. At this time, the surface of the porous diamond cutting blade 11 is adjusted to almost the same level height,
Since the diamond grains 11a are arranged in random directions, the surface of the porous diamond cutting blade 11 is
It becomes jagged and the sharpness is good.

Although FIG. 4 shows the shape of the diamond grains 11a in a spherical shape, the diamond grains 11a are originally composed of polyhedrons such as tetrahedron, hexahedron, octahedron, and dodecahedron, and each diamond grain 11a is randomly formed. Are arranged in different directions.

The porous diamond cutting blade 11 is formed by connecting the diamond grains 11a to each other with a small contact connection bond 11b of an active wax (silver brazing or the like), so that concrete, stone, metal or iron can be used. By performing operations such as cutting on the metal containing, it is possible to maximize the properties of the diamond grains 11a such as high hardness, heat dissipation, heat conductivity or large heat capacity. In addition, the occurrence of a reaction between iron (Fe) and diamond is suppressed, and the work can be performed smoothly without lowering the sharpness.

Further, when performing the blade sharpening operation, depending on the shape of the diamond tool, one or both of the holding and rotating mechanism 13 and / or the fixed portion 4 can be freely moved in the left and right direction via the moving mechanism as required. It is convenient to provide a configuration. The moving mechanism only needs to have a distance enough to allow the contact portion 2 to reciprocate in the width direction of the laminated porous diamond cutting blade 11, such as a feed screw mechanism, a hydraulic or pneumatic cylinder mechanism, and a rack and pinion. Is performed. Further, the blade may be sharpened while supplying the coolant to the working position of the contact portion 2 as necessary. By supplying the coolant, heat generation during the blade sharpening operation may be suppressed. Can be.

In FIG. 3, the sharpening operation is performed from a direction perpendicular to the tangent line of the working position of the contact portion 2 contacting the laminated diamond grindstone 10, but FIGS. ), The work may be performed in a state where the contact part 2 is inclined with respect to the tangent s of the work part.

That is, as shown in FIG. 5A, the tangent line s of the working part is turned from 90 degrees (θa) to the acute angle (θ
The abutment portion 2 may be inclined at an arbitrary angle by tilting the contact portion 2 in the direction from a to θd direction). Also, the contact portion 2 is set at 60 degrees (θb) and 45 degrees (θc) with respect to the tangent line.
Alternatively, the work may be performed by setting the angle to 30 degrees (θd).

Further, as shown in FIG.
Is a fixed position, the lamination diamond wheel 10 side is moved as shown by the imaginary line, and the working state of the contact portion 2 is changed to the tangent line s.
It may be configured to be able to work in a state inclined with respect to. At this time, the contact portion 2 moves along the tangent line s of the work site by moving the laminated diamond grindstone 10 like an imaginary line.
60 degrees, 45 degrees, and 30 degrees with respect to the laminated diamond grindstone 10.

Therefore, as shown in FIGS. 5 (a) and 5 (b), the laminated diamond grindstone 1
When the ultrasonic cutting tool is brought into contact with zero by ultrasonic vibration, the sharpening operation of the porous diamond cutting blade 11 can be easily performed.
In addition, it becomes possible to perform the sharpening work in a suitable manner even with blades of various types of porous diamond tools of other forms constituted by laminating diamond grains.

In addition to the sharpening of the diamond when the laminated diamond grinding wheel 10 is manufactured, the sharpening of the porous diamond cutting blade 11 is also performed when the diamond grains are damaged or clogged due to use. It can be. In particular, when clogging occurs due to use, the contact portion 11 abuts on the porous diamond cutting blade 11 by ultrasonic vibration to work, so that the clogging can be easily released by vibration. Become.

[0031]

The present invention has the following advantages because it is configured as described above. Even if a diamond tool is constructed using laminated diamond grains,
The surface diamond of the porous diamond can be appropriately sharpened. In addition, when performing blade sharpening work, if a stress higher than the breaking strength of the connection part of the small contact connecting the porous diamond is pressed by the rotating contact part, it is possible to perform high-precision mass production processing. Become. Further, when dressing is performed by vibrating the contact portion by ultrasonic vibration, it becomes possible to sharpen the porous diamond cutting blade in a state where the characteristics of diamond can be maximized. In addition, when the porous diamond cutting blade is clogged due to use, the clogging can be easily eliminated by the contact portion that vibrates ultrasonically.

[Brief description of the drawings]

FIG. 1 is a front view of a main part showing a blade sharpening device for a porous diamond cutting blade of the present invention.

FIGS. 2 (a) and 2 (b) are principle diagrams showing a working state of a device for sharpening a porous diamond cutting blade according to the present invention.

FIG. 3 is a perspective view of a main part of a blade sharpening device for a porous diamond cutting blade showing another embodiment of the present invention.

FIG. 4 is a principle diagram showing the principle of the sharpening operation of the porous diamond cutting blade of the present invention.

FIGS. 5 (a) and 5 (b) are principle diagrams showing working angles of contact portions of the porous diamond cutting blade of the present invention.

FIG. 6 is a perspective view showing a configuration of a conventional blade sharpening device for a diamond cutting blade.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Blade sharpening device 2 Contact part 3 Holding part 4 Fixed part 5 Main part 6 Connection cord 7 Oscillator 10 Laminated diamond grindstone 11 Porous diamond cutting blade 11a Diamond grain 11b Small contact connection bond 12 Substrate 13 Holding rotation mechanism 21 Porous diamond Blade sharpening device 22 rotating contact part 23 pressing mechanism 30 work 31 porous diamond 31a diamond grain 31b connecting part 32 substrate 33 work rotating body 34 fixing part 35 rotating shaft 40 rotating mechanism

Claims (4)

[Claims] 1. A blade sharpening device for a porous diamond cutting blade formed by laminating and laminating diamond grains at a connection portion of a small contact, comprising: a rotating contact portion abutting on the porous diamond cutting blade;
A pressurizing mechanism that presses a stress higher than the breaking strength of the connection part of the porous diamond cutting blade, a work rotating body that rotatably holds the diamond cutting blade, and a rotating contact part and a work rotating body. A blade sharpening device for a porous diamond cutting blade, comprising a rotating mechanism for rotating at least one of the blades. 2. A first step of rotating a diamond tool having a porous diamond cutting blade formed by laminating and laminating diamond grains at connection portions of small contacts, and bringing a contact rotating portion into contact with the diamond tool. And a method of sharpening the surface of the porous diamond cutting blade by applying a stress higher than the breaking strength of the connecting portion to the rotating contact portion. 3. A blade sharpening device for a porous diamond cutting blade of a diamond tool formed by laminating diamond grains, comprising: a contact portion in contact with the porous diamond cutting blade; An edge sharpening device for a diamond cutting blade, comprising: a vibrating means for vibrating; and a rotating means for rotating the diamond tool. 4. A diamond tool having a porous diamond cutting blade formed by holding diamond grains at a connection portion of a small contact is rotated by rotating means, and the porous diamond cutting blade is brought into contact with a contact portion vibrated by ultrasonic vibration. A method for sharpening a porous diamond cutting blade, comprising bringing the porous diamond cutting blade into contact with the width direction of the porous diamond cutting blade at a constant pressure.