JP2004066383A - Diamond disk for grinding - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a diamond disk for grinding for reducing unevenness in wear of a diamond grain piece even in long use by effectively working respective diamond grain pieces, and improving a discharge property of cut dust from a center part of a disk surface. <P>SOLUTION: The diamond disk includes the diamond piece 2 fixed from an intermediate part 5 to a peripheral edge part 6 of the disk surface. The respective diamond grain pieces are fixed orderly by setting a separating distance m1 between the diamond grain pieces before and behind on a common rotation locus to be longer than a separating distance m2 with the adjacent diamond piece on an adjacent rotation locus. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a grinding diamond disk used for grinding various kinds of workpieces using a disk grinder.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, diamond disks have been put into practical use in which a diamond piece is fixed on a disk surface made of a steel plate while leaving a central portion thereof.
[0003]
This type of diamond disk is attached to the rotating shaft of a disk grinder through a mounting hole provided in the center of the disk, and is used for grinding workpieces such as concrete members, stones, and tiles by rotating at high speed. Various diamond disks having different sizes and shapes of disks, and different particle sizes and densities of diamond flakes adhered to the disk surface are commercially available in accordance with the purpose of use.
[0004]
[Problems to be solved by the invention]
By the way, in the case of a diamond disk to which a relatively large grain of diamond particles is fixed, the individual diamond particles are fixed to the disk surface at appropriate intervals by brazing, laser welding, or the like. When the pieces are simply fixed to the disk surface at intervals so that there is no unevenness in the overall density, when used for actual grinding work, the pieces of the diamond particles located on a common rotation locus move back and forth in the rotational direction. However, if the separation distance between the preceding and following dangmond grains on the rotation trajectory is small, the subsequent dunnmond grains are hidden behind the preceding dunnmond grains, and the individual dannymond grains do not work effectively and the grinding efficiency is reduced. Lower.
[0005]
In addition, when used for a long period of time, the diamond flakes on the disk surface have uneven wear, which causes a decrease in grinding efficiency and a shortened service life.
[0006]
In addition, due to the arrangement of the danmond grains on the disk surface, the random arrangement prevents the density from becoming uneven throughout, and during the grinding operation, the cutting powder moves from the center of the disk surface to the periphery. Clogging is likely to occur, which also affects grinding efficiency.
[0007]
Therefore, the present invention can be used without any difference from the commercial product in terms of handling, can effectively work the individual diamond pieces, reduce uneven wear of the diamond pieces even if used for a long time, and, An object of the present invention is to provide a grinding diamond disk having improved dischargeability of cutting powder from the center of the disk surface.
[0008]
[Means for Solving the Problems]
In order to achieve the above object, the grinding diamond disk according to the present invention has a common rotation locus in a diamond disk in which a diamond portion is fixed from the middle of the disk surface to the peripheral portion while leaving a central portion of the disk. The distance between the adjacent diamond pieces is set to be longer than the distance between adjacent diamond pieces on the adjacent rotation trajectory, and the respective diamond pieces are fixedly aligned. I do.
[0009]
Here, the disk itself is made of a steel plate, and is hung from a disk intermediate portion to a central portion having a mounting hole, leaving a flat plate portion to be depressed to one disk surface side at a predetermined depth, and to the other disk surface side. In this example, a piece of diamond particles is fixed on the disk surface extending from the outer peripheral portion of the depression to the outer peripheral portion of the disk.
[0010]
According to the diamond disk configured in this way, the separation distance between the front and rear dangmond grains on the common rotation trajectory is longer than the separation distance between the adjacent danmond grains on the adjacent rotation trajectory. Because of the setting, in the grinding work on concrete and stone, etc., a sufficient space is secured between the preceding and succeeding diamond particles on the common rotation trajectory due to the rotation of the diamond disk, There is no possibility that grinding unevenness occurs behind the grain of the dang-a-mond, and each dang-a-mond can work effectively to increase the grinding efficiency.
[0011]
In addition, the individual diamond pieces receive uniform cutting resistance and reduce uneven wear of the diamond pieces even when used for a long time.Therefore, there is no reduction in grinding efficiency from this aspect, and the service life can be extended. It is planned.
[0012]
In addition, as the arrangement of the diamond particles on the disk surface, the gap formed between the diamond particles adjacent to each other on the adjacent rotation trajectory is inclined in the radial direction with the inner end preceding the rotation direction. If the inner end of the gap is made to precede in the rotation direction and become spiral toward the outer end, the cutting powder generated at the center of the disk surface during the grinding operation will be reduced. Since it is guided naturally and naturally toward the outer periphery of the disc from the gap formed between the preceding and following dangmond grains and discharged to the outside, it remains on the disc surface and does not clog, so grinding from this surface is also possible Efficiency can be increased.
[0013]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an example of an embodiment of the present invention will be described with reference to the drawings.
[0014]
FIG. 1 is a front view of a diamond disk showing an embodiment of the present invention, FIG. 2 is a longitudinal sectional view of the diamond disk, and FIG. 3 is a partially enlarged front view of the diamond disk for explaining the arrangement of diamond particles. .
[0015]
In the figure, a diamond piece 2 is fixed to a disk surface on one side of a disk 1 made of steel plate with a limited area.
[0016]
The disc 1 according to the embodiment is formed by hanging from the middle of the disc to the center portion having the mounting hole 3 and leaving a flat portion to be recessed at a predetermined depth toward one of the disc surfaces to form a recessed portion 4. The outer peripheral portion 5 is rounded to the other disk surface side to form a bulging shape, and the outer peripheral portion 5 is hung on the outer peripheral portion 6 of the disk to form a gentle curved surface and bend toward the concave portion 4 side. The piece 2 of the diamond-shaped diamond is fixed to the disk surface extending from the outer peripheral portion 5 of the depression to the outer peripheral portion 6 of the disk by a known method.
[0017]
The arrangement of the granulated diamond pieces 2 in the embodiment will be described with reference to FIG. 3 taking three adjacent rotation trajectories a, b, and c as examples.
[0018]
As shown in FIG. 3, the positional relationship between the adjacent diamond trajectories a, b, and c is the distance between the adjacent diamond trajectories 2 a on the common rotation trajectory a. m1 is set to be longer than the separation distance m2 between the adjacent diamond trajectories 2b and 2c on the rotation trajectories b and c on both sides of the rotation trajectory a, and the respective diamond flakes 2 are fixed in an aligned manner. I have.
[0019]
In this case, as the alignment of the diamond pieces 2, the diamond pieces 2 adjacent to each other are locally arranged in a substantially diamond shape when viewed locally in the rotation direction (the direction of the rotation trajectory) of the disk 1. As a spatially wide array, a gap 7 is formed between the adjacent diamond locus pieces 2 on adjacent rotation trajectories, and this gap 7 causes its inner end 7a to precede in the rotation direction. The outer end 7b reaches the outer peripheral portion 6 of the disk in an arch shape inclined in the radial direction.
[0020]
【The invention's effect】
The present invention is carried out in the form described above, and according to the present invention, it is attached to the rotating shaft of a disk grinder through a mounting hole provided in the center of a diamond disk, and grinds concrete, stone, etc. In terms of handling, it can be used without any difference from commercial products. Arrangement of the diamond pieces fixed to the disk surface, the separation distance between the adjacent diamond pieces on the common rotation trajectory is longer than the separation distance between the adjacent diamond pieces on the adjacent rotation trajectory. During the grinding operation, the subsequent dhammond grains do not hide behind the preceding dhammond grains on a common rotation trajectory, and the individual dhammond grains work effectively to improve work efficiency. Can be enhanced.
[0021]
In addition, a gap is formed between adjacent diamond trajectories on the rotation trajectory, in which the inner end precedes in the rotational direction and the radially incline reaches the outer peripheral portion of the disk. The cutting powder generated at the center of the surface is naturally guided to the outer periphery of the disc naturally and discharged from this gap, preventing clogging.This also ensures stable cutting performance from this surface and increases grinding efficiency. it can.
[Brief description of the drawings]
FIG. 1 is a front view of a diamond disk showing an embodiment of the present invention.
FIG. 2 is a longitudinal sectional view of the diamond disk in FIG.
FIG. 3 is a partially enlarged front view of a diamond disk for explaining the arrangement of granulated diamond pieces.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Disc 2 Dan-yamond grain piece 2a Dan-yamond grain piece 2b Dan-yamond grain piece 2c Dan-yamond grain piece 3 Mounting hole 4 Recessed part 5 Recessed part outer peripheral part 6 Disk peripheral part 7 Gap 7a Gap inner end 7b Gap outer end

Claims (3)

In a diamond disk in which the diamond part is fixed from the middle part of the disk to the peripheral part, leaving the center part of the disk, the separation distance between the preceding and succeeding diamond particles on the common rotation trajectory is determined by the adjacent rotation trajectory. A diamond disc for grinding, characterized in that each of the diamond pieces is fixed in an aligned manner by setting the distance between the diamond pieces to be longer than that of the adjacent diamond pieces. A gap formed between adjacent pieces of dangmond grains on adjacent rotation trajectories and adjacent to each other, wherein the gap has an arch shape inclined in a radial direction with an inner end preceding the rotation direction. The diamond disc for grinding according to 1. 2. A gap formed between adjacent pieces of dangmond grains on adjacent rotation trajectories and adjacent to each other, and spirals toward the outer end with the inner end preceding the rotation direction. The described diamond disc for grinding.

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