JPS61117070A - Round saw for cutting hard substance - Google Patents

Abstract

PURPOSE:To improve economic efficiency and cutting precision by arranging the notched parts at equal intervals onto a cutting-edge formation part formed into tooth form and forming the cut parts onto an annular disc corresponding to the notched parts. CONSTITUTION:A cutting-edge formation part 2 is formed thinner than the thickness of an annular disc 1, and formed into comb shape, and a cutting-edge part 7 is formed by attaching minute diamond grains 6 onto the surface. The connection part 5 with the root parts 4 and 4 of the cutting-edge formation part 2 is formed into circular form. In the round saw thus formed, the notched parts 10 having a proper width are arranged at equal intervals onto the cutting- edge formation part 2 formed into tooth form, and the cut parts 11 are formed by a circular curve onto the annular disc 1 corresponding to the notched parts 11. Therefore, the efficiency of cooling effect can be improved by improving the flow of water or cutting oil.

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention is a circular saw for cutting hard materials such as various semiconductor materials such as silicon, ceramics, tungsten, kerosene, and jewelry. It is related to.

(Prior Art) The present inventor previously developed a technology related to a circular saw for cutting hard materials, which was developed in Japanese Patent Application No. 1986/Tata? A patent application is currently pending as No. 07.

In this prior art, a large number of holes are arranged at equal intervals in a blade forming part having an appropriate width from the inner circumferential end of the annular circular plate toward the outer circumferential direction of the annular circular plate. In a circular saw for cutting hard materials in which a blade part is formed by bonding a series of diamond particles to the surface and the inner circumferential wall of the hole, the wall thickness of the blade part forming part is set to be equal to or greater than the wall thickness of the annular circular plate. This is a circular saw for cutting hard materials, which is characterized by its thinness.

(Problems to be Solved by the Invention) According to such conventional technology, diamond particles are bound to the inner circumferential wall of the holes provided in the blade forming portion, that is, pillars of diamond particles are formed. , the diamond fine particles that adhere to the surface of the blade forming part can be firmly bound, and the formed blade part continuously exhibits a cutting effect, and the holes allow good circulation of water or cutting oil. Not only does it have the effect of improving the cooling effect, but by making the wall thickness of the blade part forming part thinner than the wall thickness of the annular disc, the blade part can be improved without reducing the wall thickness of the entire annular disc. The wall thickness can be made thinner, and the binding area can be increased by the step formed by making the wall thickness of the blade forming part thinner than the wall thickness of the annular plate. The binding force to the blade forming part can be increased, and the stepped part can at least withstand the stress applied to the diamond particles near the stepped part.
It is possible to improve the durability of the blade part, that is, the circular saw.

However, with such conventional technology, it is troublesome to arrange a large number of holes in the blade forming part, and there is a limit to further increasing the binding area by the inner peripheral wall of the holes. Therefore, the binding force of the diamond particles that bind to the inner peripheral wall of this hole cannot be increased any further;
There is also a problem that there is room for improvement in improving the cooling effect by improving the flow of water or cutting oil through the holes formed in the blade.

(Means to Solve the Problems) This invention was made to solve the problems of the prior art, and furthermore, it is an invention based on patent application (1) filed at the same time as the present patent application. According to the present invention, the thickness of the blade forming portion having an appropriate width from the inner circumferential end of the annular circular plate toward the outer circumference 1 and τ direction of the annular circular plate is set as above. The blade portion is made thinner than the wall thickness of the annular circular plate, and the blade portion is formed into a comb tooth shape, and diamond fine particles are bound in series to the surface of the blade portion formed into the comb tooth shape to form the blade portion. In the circular saw for cutting hard materials, intermittent portions are arranged at equal intervals in the blade forming portion formed in the comb tooth shape, and notches are formed in the annular circular plate corresponding to the intermittent portions. A circular saw for cutting hard materials is provided.

In the above configuration, the tooth-shaped blade forming portion can be formed by connecting the respective root portions with a curved line.

In this case, it is possible to prevent cracks from forming and breaking at the connection portions between the root portions of the tooth-shaped blade forming portions.

In the above configuration, the cutout portion formed in the annular plate can be formed by an arcuate curve.

In this case, it is possible to prevent cracks from forming in the notch and breakage.

(effect) The above technical means works as follows.

First, there is an effect that the thickness of the blade forming portion is made thinner than the thickness of the annular plate, which is the same as in the prior art described above.

That is, by making the wall thickness of the blade portion forming part thinner than the wall thickness of the annular circular plate, firstly, the strength of the annular circular plate can be reduced without reducing the overall wall thickness of the annular circular plate. Without,
This works to form a thinner blade and reduce the cutting width as much as possible.Secondly, the diamond particles that adhere to the blade forming part cause the thickness of the blade forming part to be smaller than the thickness of the annular plate. By making the diamond thinner, the binding area of the stepped portion increases, which acts to strengthen the binding force. Thirdly, when used, at least the diamond particles near the stepped portion are By having the stepped portion absorb the stress, durability is improved.

Next, by forming the blade forming part into a comb tooth shape,
Firstly, it is easier to form the toothed shape than the conventional technique of arranging a large number of holes in the blade forming part. The right and left sides of each of the blade forming parts formed in the shape act to strengthen the binding force of the diamond particles, and thirdly, the binding force between the blade forming parts formed in the tooth shape is increased. The gaps serve to improve the circulation of water or cutting oil, thereby further improving the cooling effect.

Furthermore, the intermittent portions are arranged at equal intervals in the blade forming portion formed in the comb tooth shape, and notches are formed in the annular plate corresponding to the intermittent portions, so that the intermittent portion is formed in the blade forming portion. The notches in the annular plate and the annular plate serve to improve the circulation of water or cutting oil and improve the efficiency of the cooling effect.

(Embodiment) An embodiment of the present invention will be described with reference to the drawings (1)
is an annular circular plate made of a steel plate, etc., and the annular circular plate (1) has an appropriate width from its inner circumferential end toward the outer circumference of the disk, and both the front and back sides of the annular circular plate (1) are cut. By doing so, the blade forming portion (2) is formed to be thinner than the wall thickness of the annular plate (1).

The blade forming part (2) is formed into a comb tooth shape by forming a large number of gaps (3), and the root part (4) of each blade part forming part (2) Connection part (5
) is formed in an arc shape.

In the blade forming part (2) formed in the shape of a comb tooth, intermittent parts αQ having an appropriate width are arranged at equal intervals, and on the other hand, in the annular circular plate (1) corresponding to the intermittent parts αQ, A notch (6) is formed by an arcuate curve.

(6) is a single layer of diamond particles bonded to the surface of the blade forming portion (2) by electroplating.
) is formed.

(8) is a stepped portion formed by cutting both the front and back sides of an annular circular plate (1), and the stepped portion (8) is a blade portion.
' Diamond particles (6
) are tied together.

Note that the annular plate (1) determines the thickness of the blade forming part (2).
) is the amount of cutting on both the front and back sides of the diamond particles (
The thickness of the blade portion (7) may be the same as or slightly less than the thickness of the annular plate (1), or may be slightly thicker.

When carrying out the present invention, the wall thickness of the annular circular plate (1) can be set to an ultra-thin steel plate, for example, about 0.1 to 1.5 mm, and the diamond particles (6) are can be bonded to the surface of the blade forming part (2) in a multilayered form of two or more layers.

(Effects of the Invention) As explained above, the present invention provides the blade forming portion as described in the section of the effect by making the wall thickness of the blade forming portion thinner than the wall thickness of the annular plate. The effect is achieved by making the wall thickness of the annular plate thinner than that of the annular plate.

Next, by forming the blade forming part into a comb tooth shape,
Firstly, the work of forming the blade part forming part into a comb tooth shape is easier than the work of arranging a large number of holes in the blade part forming part as in the conventional technology. The adhesion of the diamond particles can be strengthened by the left and right sides of each of the blade formation parts formed, and thirdly, the gap between each of the blade formation parts formed in the tooth shape allows water or cutting oil to be absorbed. The cooling effect can be further improved by improving the flow of water.

Furthermore, by arranging the intermittent parts at equal intervals in the blade forming part formed in the tooth shape and forming notches in the annular plate corresponding to the intermittent parts, the intermittent parts and The cutout portion of the annular plate allows for better circulation of water or cutting oil, thereby improving the efficiency of the cooling effect.

As a result, according to the present invention, it is possible to cut expensive hard materials with less cutting allowance and to improve economical efficiency, such as extending the life of the circular saw, and further improving cutting accuracy. Can be done.

[Brief explanation of the drawing]

The drawings show an embodiment of a circular saw for cutting hard materials according to the present invention, and FIG. 1 is a front view of the main part with part of the diamond particles of the blade peeled off to expose the blade forming part. Figure 2 is an enlarged sectional view taken along line A-A in Figure 1, and Figure 3 is an enlarged cross-sectional view of Figure 1.
It is a partially enlarged front view of the figure. In the drawing, (1) is an annular circular plate, (2) is a blade forming part formed in a comb tooth shape, (3) is a gap, (4) is a root part, (5) is a connecting part, and (6) is a diamond. Fine particles, (7)
(8) is a stepped portion, (9) is a lower edge of the blade, α0 is an intermittent portion, and α〃 is a notch portion.

Claims (1)

[Scope of Claims] 1. The thickness of the blade forming portion having an appropriate width from the inner circumferential end of the annular disk toward the outer circumference of the annular disk is made thinner than the wall thickness of the annular disk, and A circular saw for cutting hard materials, in which the blade forming part is formed into a comb tooth shape, and the blade part is formed by binding diamond particles in series to the surface of the blade forming part formed into the comb tooth shape. In the above-mentioned comb tooth-shaped blade forming portion, intermittent portions are arranged at equal intervals, and cut-out portions are formed in the annular circular plate corresponding to the intermittent portions. Noko. 2. A circular blade for cutting hard materials according to claim 1, wherein the blade forming portion formed in a comb tooth shape is formed by connecting each root portion with a curved line. child. 3. The circular saw for cutting hard materials according to claim 1 or 2, wherein the notch is formed by an arcuate curve.