JP2004181590A - Diamond blade - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a blade diamond blade by which a cutting quality at the beginning of cut-off is made good, and which is excellent in durability at cutting. <P>SOLUTION: The diamond blade 1 is mainly comprised of a plurality of slits 3 in which a substantially disc-like shape is presented and formed into a hook hole shape by a combination of a straight line and a round shape at a predetermined interval on the outer periphery, a rotary shaft hole 4 provided in a rotary shaft center, a steel-made substrate 6 having a rotary locking hole 5 for transmitting a rotary drive stably by being provided close to the rotary shaft hole 4, and a tip 2 presenting a flat plate shape installed between the slits 3, respectively, along the outer peripheral direction of the substrate 6. And the tip 2 is; having a tip face 7a having the groove in which three cut grooves 9 toward the direction of the rotary shaft hole 4 from the tip outer end are provided by being cut, and a tip 7b not having a cut groove 9; that the tip face 7a having a groove is installed by being jointed to the substrate 6 so that it is made to appear on the substrate surface 10 and the substrate rear face of the substrate 6 alternately. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a diamond blade, and more particularly to a diamond blade capable of cutting an object to be cut such as a stone material, a concrete material, and an asphalt material.
[0002]
[Prior art]
Conventionally, a plurality of slits (notches) are provided at predetermined intervals on the outer periphery of a metal substrate having a substantially disk shape, and a diamond chip of a super hard diamond is fixed between the slits by sintering. It is possible to cut hard materials such as stone materials, concrete materials, and asphalt materials used for road pavement, etc. using diamond blades provided by Is being done.
[0003]
The above prior art is naturally performed by those skilled in the art, and the applicant did not know the document describing this prior art at the time of filing the present application.
[0004]
[Problems to be solved by the invention]
However, the conventional diamond blade has various problems described below. In other words, it is used for cutting hard materials such as stone and concrete, so that the diamond blade is not warped or deformed during the cutting process, and is cut to have excellent durability. It was made of a material that was harder than the material and was formed thick.
[0005]
However, if the thickness is formed as described above in order to increase the strength of the diamond blade, the contact area between the diamond chip at the tip of the diamond blade and the object to be cut increases, especially at the start of cutting (start of cutting). This makes it difficult to quickly cut the object to be cut, that is, the sharpness may become dull. Therefore, in order to secure the strength of the diamond blade, it is necessary to form the substrate and the diamond chip with a large thickness, and on the other hand, to solve the conflicting problem of forming the diamond blade as thin as possible to sharpen the sharpness at the beginning of cutting. Many workers wanted a diamond blade having excellent durability and sharpness (cutting workability).
[0006]
In view of the above-mentioned circumstances, an object of the present invention is to provide a diamond blade having excellent sharpness at the start of cutting and having excellent durability at the time of cutting.
[0007]
[Means for Solving the Problems]
In order to solve the above problem, a diamond blade according to the invention of claim 1 has a substantially disk shape, a substrate having a plurality of slits formed at predetermined intervals on an outer periphery, and attached between the slits. A diamond blade for cutting an object to be cut by the diamond chip, wherein the diamond chip has a substantially flat plate shape and at least one of the chip surfaces has a circular shape of the substrate from an outer end of the chip. A cut groove is provided in the center direction.
[0008]
Here, the cut grooves may be provided on the front and rear chip surfaces of the flat diamond chip, respectively, or may be provided only on one of the chip surfaces. Furthermore, the number of cut grooves provided on the chip surface of one diamond chip is not particularly limited, and may be at least one.
[0009]
Therefore, according to the diamond blade of the first aspect, the notch is formed from the outer end of the diamond chip toward the center of the substrate. Accordingly, the contact area between the object to be cut at the start of the cutting process and the outer end of the chip in contact with the object to be cut can be reduced by providing the kerfs on the chip surface. The object to be cut is easily scraped off by the cutout portion. Thereby, in the cutting process using the diamond blade, the sharpness particularly at the start of cutting is improved, and the work is performed quickly. In addition, when the cutting work progresses, the diamond chip is buried in the object to be cut, and the substrate front surface and the substrate back surface of the substrate come into contact with the object to be cut, the cutting is smoothly performed by the kerf. . In addition, similarly to the conventional diamond blade, the thickness of the diamond tip can be formed to a thickness that does not impair the deformation or durability due to the object to be cut.
[0010]
A diamond blade according to a second aspect of the present invention is the diamond blade according to the first aspect, wherein the diamond tip has the groove provided on one of the chip surfaces and the groove provided with the groove. Chip surfaces are alternately arranged on the substrate front side and the substrate back side of the substrate.
[0011]
Therefore, according to the diamond blade of the second aspect of the present invention, in addition to the action of the diamond blade of the first aspect, the kerf is formed only on one of the chip surfaces of the diamond tip, and the grooved tip having such a kerf The diamond chip is attached to the substrate so that the surface alternately appears on the substrate front side and the substrate back side of the substrate. Thereby, at the time of cutting, the contact portions of the object to be cut contacting the cut grooves on the grooved chip surface of the diamond chip are evenly distributed to the left and right in the cutting direction of the diamond blade to be cut by rotation. Thereby, the cutting process is stabilized, and the wear of the diamond blade and the diamond tip is averaged, so that the bias due to the wear of the diamond blade is suppressed, the durability is improved, and the life can be extended. Therefore, the cutting can be stably performed over a long period of time.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, a diamond blade 1 according to an embodiment of the present invention will be described with reference to FIGS. FIG. 1 is a front view showing the configuration of the diamond blade 1 of the present embodiment, FIG. 2 is a plan view showing the configuration of the diamond blade 1, and FIG. 3 is a rear view showing the configuration of the diamond blade 1. 4 is an enlarged front view showing a configuration of a main part near the diamond tip 2 in the diamond blade 1.
[0013]
As shown in FIGS. 1 to 4, the diamond blade 1 of the present embodiment has a substantially disk shape, and has a plurality of slits 3 formed in a hook hole shape by a combination of a straight line and a circle at predetermined intervals on the outer periphery. A steel substrate 6 having a rotation shaft hole 4 provided in the rotation shaft center, and a rotation locking hole 5 provided in close proximity to the rotation shaft hole 4 for stably transmitting the rotation drive; Along the outer peripheral direction, and is mainly constituted by a flat diamond chip 2 (hereinafter simply referred to as “chip 2”) attached between the slits 3. In the present embodiment, 22 pieces of the chip 2 are attached to the substrate 6.
[0014]
Further, the chip 2 attached to the substrate 6 will be specifically described. As shown in FIG. 4, the chip 2 is a plate-like member in which a super hard diamond grindstone is fixed on the surface by sintering. On one chip surface 7a (hereinafter referred to as “groove chip surface 7a”), three cut grooves 9 are cut from the chip outer end 8 toward the rotation shaft hole 4 of the substrate 6 attached. Have been. The above-described cut groove 9 is not formed in the other opposing chip surface 7b.
[0015]
That is, the cut groove 9 is provided only on one surface of the chip 2 (the grooved chip surface 7a). Then, the chip 2 is bonded and attached between the slits 3 of the substrate 6 by brazing. At this time, the grooved chip surfaces 7a having the cut grooves 9 are attached to the substrate front surface 10 and the substrate back surface 11 of the substrate 6 so as to appear alternately. That is, when the diamond blade 1 of the present embodiment is viewed from the direction facing the substrate surface 10 (corresponding to the front of the paper surface in FIG. 1), the grooved chip surface 7a having the kerf 9 is the chip surface without the kerf 9 7b are interleaved alternately. In the present embodiment, an example in which three kerfs 9 are provided on the grooved chip surface 7a is illustrated, but the number of kerfs 9 for one grooved chip surface 7a is not particularly limited, and cutting is performed. It can be changed as appropriate depending on the size of the object to be cut or the size of the chip 2 forming the cutting groove 9, and at least one or more may be provided.
[0016]
When the number of the chips 2 to be bonded and attached to the substrate 6 is an even number (22) as in this embodiment, the grooved chip surfaces 7a and the chip surfaces 7b are alternately and regularly alternately. It will be arranged in. When the number of the chips 2 is an odd number, the grooved chip surface 7a (or the chip surface 7b) may be continuously provided at any one place.
[0017]
Further, as shown in FIGS. 1 and 4, the diamond blade 1 according to the present embodiment has a first protrusion 13 a and a second protrusion 13 a having different lengths at a part of the periphery of the slit 3 cut out from the substrate 6. Pieces 13b are provided respectively. Here, the first projecting piece 13a and the second projecting piece 13b are attached to the linear portion of the slit 3 corresponding to the rotation direction of the diamond blade 1. Note that the first protruding piece 13a has a length extending over the entire length of the linear portion of the slit, while the second protruding piece 13b is formed with a length that is approximately half the length of the first protruding piece 13a.
[0018]
Next, a method of using the diamond blade 1 of the present embodiment will be described. First, a driving unit (not shown) for driving the diamond blade 1 of this embodiment to rotate at high speed along an axis and a rotation shaft hole 4 and a rotation locking hole 5 provided in a substrate 6 are provided. Connecting. At this time, the rotational driving force transmitted to the diamond blade 1 is transmitted by the rotating shaft 14 of the driving unit connected to the rotating shaft hole 4. Then, a locking shaft 15 is inserted into the rotation locking hole 5 in order to reliably transmit the rotation driving force transmitted through the rotation shaft 14 to the diamond blade 1. Accordingly, the diamond blade 1 is rotated at a high speed and in a stable state without loss of the rotational driving force from the driving unit, in other words, without slippage between the rotating shaft 14 and the rotating shaft hole 4. be able to. Note that the above-described mounting method is an example of a conventionally known method, and the connection with the driving unit for rotating the diamond blade 1 may use other known techniques and members. .
[0019]
By the above-described operation, the outermost end of the diamond blade 1 is brought close to the object to be cut while the diamond blade 1 is rotating at a high speed. Here, the outermost end of the diamond blade 1 corresponds to the outer end 8 of the tip 2 as shown in FIGS.
[0020]
Then, when the outer end 8 of the chip comes into contact with the object to be cut, the contact portion of the object to be cut is shaved off by the chip 2 to which the cemented carbide diamond grindstone is fixed by sintering, and cutting is performed. At this time, as described above, the chip 2 has the grooved chip surface 7a having the cut groove 9 and the chip surface 7b having no cut groove 9 joined to the substrate front surface 10 and the substrate back surface 11 so as to appear alternately. I have. The chip outer end 8 is partially notched by a cut groove 9. Therefore, when the outer end 8 of the chip comes into contact with the object, that is, at the start of cutting the object by the diamond blade 1, the contact area between the outer end 8 of the chip and the object can be reduced.
[0021]
Then, a part of the kerf 9 increases the coefficient of friction with the object to be cut, so that the object to be cut can be efficiently scraped even with a small contact area. Therefore, similarly to the case where the chip 2 is formed thin, the sharpness (cutting workability) of the diamond blade 1 particularly at the start of cutting can be improved, and the cutting operation can be performed stably.
[0022]
In the state where the cutting of the object to be cut has progressed by the diamond blade 1 after the start of cutting described above, that is, when the cutting operation is virtually viewed from the side, the chip surfaces 7a and 7b of the chip 2 are cut. Even in a state where the diamond blade 1 is hidden by the cut object, the diamond blade 1 of the present embodiment can efficiently cut the cut object by cutting with the tip outer end 8 or the like. At this time, since the cutting grooves 9 are provided, it is easy to discharge chips and the like cut from the object to be cut, and the operation is performed more quickly.
[0023]
In addition, since the chip 2 of the diamond blade 1 can be formed into a thick plate in the same manner as a conventional diamond blade, problems such as deformation and warpage may occur due to the force applied to the diamond blade 1 during cutting. There is no.
[0024]
Further, since the chip surfaces 7a having the kerfs 9 are arranged alternately on the front and back surfaces 10 and 11 of the substrate 6, the kerfs 9 of the respective chips 2 of the diamond blade 1 rotating at high speed are provided. The point of contact with the object to be cut changes every moment as the tip 2 rotates. That is, portions cut by the cut grooves 9 appear alternately on the substrate front surface 10 side and the substrate back surface 11 side of the substrate 6. Therefore, the diamond blade 1 is cut evenly to the thickness of the substantially disk-shaped diamond blade, and stable cutting is performed.
[0025]
Furthermore, the degree of wear of the chip 2 of the diamond blade 1 that is worn by contact with the object to be cut is also substantially uniform on the substrate front surface 10 side and the substrate rear surface 11 side, so that the durability of the diamond blade 1 is not impaired. In addition, in the diamond blade 1 of the present embodiment, the first protruding pieces 13a and the second protruding pieces 13b are alternately arranged in the slit 3, so that the cutting locations are not concentrated in one place. Good cutting can be performed, and the durability of the diamond blade 1 can be improved.
[0026]
As described above, the present invention has been described with reference to the preferred embodiments. However, the present invention is not limited to these embodiments, and various improvements can be made without departing from the gist of the present invention as described below. And design changes are possible.
[0027]
That is, in the diamond blade 1 of the present embodiment, the number of the cut grooves 9 formed in the chip 2 is three provided for one chip 2, but the present invention is not limited to this. The number of the cut grooves 9 can be appropriately changed according to the material and hardness of the object to be cut and the outer diameter of the diamond blade. In addition, the number of chips 2 attached to the substrate 6 is not particularly limited, and can be changed according to the diameter of the diamond blade 1.
[0028]
In addition, a cut groove 9 is provided in one of the chips 2 and the grooved chip surfaces 7a are arranged so as to alternately appear on the substrate front surface 10 and the substrate back surface 11, but the present invention is not limited to this. Instead, the arrangement rule may be changed, such as every two or three. Further, the grooved chip surfaces 7a may be randomly arranged without giving regularity to the appearance thereof. Thereby, a cutting part changes and durability of the diamond blade 1 can be improved.
[0029]
In addition, although the cut grooves 9 are provided only on one chip surface 7a, the cut grooves 9 may be formed on both surfaces of the chip 2. Thereby, the contact area with the object to be cut is further reduced, so that good sharpness is maintained. However, by forming the kerfs 9 on both sides of the chip, the strength of the chip 2 is reduced, and the diamond blade 1 and the chip 2 are more likely to be bent or the like during the cutting process. As described above, it is particularly preferable that the grooved chip surfaces 7a and the chip surfaces 7b are alternately arranged.
[0030]
【The invention's effect】
As described above, in the diamond blade according to the first aspect of the present invention, one or more cut grooves are formed on the tip surface of the diamond tip. Thereby, without affecting the strength of the diamond blade, the contact area between the object to be cut and the outer end of the chip at the time of cutting can be reduced, and the sharpness, especially at the start of cutting, can be improved. Cutting work.
[0031]
A diamond blade according to a second aspect of the present invention is arranged such that, in addition to the effects of the diamond blade according to the first aspect, the grooved chip surfaces having the cut grooves alternately appear on the substrate front surface and the substrate rear surface, respectively. Have been. Thereby, the wear of the chip at the time of cutting becomes uniform, and the durability of the diamond blade is improved. Furthermore, since the cut grooves are formed only on one surface, the strength of the chip is not impaired, and the possibility of the chip or the like being deformed by the force applied at the time of cutting can be reduced.
[Brief description of the drawings]
FIG. 1 is a front view illustrating a configuration of a diamond blade according to an embodiment.
FIG. 2 is a plan view showing the configuration of the diamond blade of the present embodiment.
FIG. 3 is a rear view showing the configuration of the diamond blade of the present embodiment.
FIG. 4 is an enlarged front view showing a configuration of a main part near a diamond tip in a diamond blade.
[Explanation of symbols]
1 diamond blade 2 tip (diamond tip)
3 Slit 6 Substrate 7a Groove chip surface (chip surface)
7b Chip surface 8 Chip outer end 9 Cut groove 10 Substrate surface 11 Substrate back surface

Claims (2)

Substrate having a substantially disk shape and having a plurality of slits formed at predetermined intervals on the outer periphery, and a diamond blade comprising a diamond chip attached between the slits, and cutting the object to be cut by the diamond chip And
The diamond tip,
A diamond blade having a substantially flat plate shape, wherein at least one of the chip surfaces is provided with a cut groove from an outer end of the chip toward a center of the substrate. The diamond tip,
The kerf is provided on one of the chip surfaces,
2. The diamond blade according to claim 1, wherein the grooved chip surfaces provided with the cut grooves are alternately arranged on the front surface side and the back surface side of the substrate, respectively. 3.

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