JP2602877Y2 - Diamond blade - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a diamond blade used for cutting a road or the like paved with asphalt or concrete.

[0002]

2. Description of the Related Art As shown in FIG. 3, a conventional blade has a shape in which a diamond chip is brazed on the outer periphery of a disk-shaped steel substrate. Therefore, in order to know the depth (cutting depth) at the start of the cutting operation or during the operation, it is necessary to insert a gold scale or the like into the cutting groove for measurement. This is because the order of the cutting work is cut in 5 cm, 10 cm, 15 cm, etc., depending on the thickness of the concrete being paved, in units of 5 cm. A method is also conceivable in which the side of the blade is colored to detect the cutting depth of the blade during high-speed rotation by color, but the effect disappears immediately because the paint peels off during the work.

[0003]

SUMMARY OF THE INVENTION An object of the present invention is to provide a cutting diamond blade which can easily determine the cutting depth during high-speed rotation.

[0004]

SUMMARY OF THE INVENTION As described above, the inventor of the present invention has proposed a method in which the operator can easily set the cutting depth and can check the cutting state during the cutting operation. Pay attention to the fact that if a plurality of slit-shaped holes are penetrated and placed at the same distance from the center of rotation, a circular slit window appears to open on the disc-shaped substrate rotating at high speed by the principle of afterimage. This was applied to the measurement of the distance from the outer periphery to complete the present invention.

That is, the present invention provides a diamond blade having a diamond-shaped chip attached to the outer periphery of a disk-shaped substrate, and a plurality of through-holes for detecting a depth of cut formed on the circumference where the disk-shaped substrate is concentric with the outer circumference. Wherein the sum of the lengths of the through holes on the concentric circumference is 5 to 20% of the length of the concentric circumference. The present invention will be described in more detail with reference to the drawings of embodiments. FIG. 1 is a side view of a diamond blade according to an embodiment of the present invention.
It is used for cutting to a depth of 1 mm, and the substrate is placed at a position 50 mm from the outer edge of the substrate 1 on a regular diamond blade in which 18 diamond chips 2 are brazed to the outer edge of a disk-shaped substrate 1 having a radius of 156 mm. 8 through slit holes 3
There is a feature in the point provided.

The shape of the through hole according to the present invention can be selected from any shape such as a circle, a square, and an ellipse. However, a vertically elongated slit as shown in FIG. 1 reduces the area of the through hole. However, it is desirable because the position can be easily confirmed during rotation.
If the area of the through hole is large, the strength of the diamond blade decreases. In the diamond blade of this embodiment, a total of eight through slit holes 3 are provided at regular intervals, and the through slit holes 3 have a radius of 10 around the center 4 of the substrate.
6mm concentric circle, the longitudinal direction of the slit hole 3 is
The tangents of the concentric circles coincide with each other. In this embodiment, the length of the slit hole 3 is 14 mm and the width is 6 mm.

The outer side surface and the inner side surface of the slit hole 3 are also concentric arcs of the center 4. In addition, it is necessary that the concentric slit holes balance the weight with respect to the rotation center point. For example, the rotation balance can be maintained by keeping the intervals between the slit holes on the concentric circle constant. If the length of the slit hole 3 of the present invention is short, the position of the through hole of the diamond blade cannot be confirmed during rotation of the diamond blade. If it is too long, the strength of the diamond blade decreases. In the present embodiment, the total length of the eight slit holes 3 is 112 mm, which is equivalent to 16.8% of the circumference of the concentric circle, and corresponds to a central angle of 60 degrees when converted into an angle. One sixth of the angle of 360 degrees is a through hole.

In the present invention, it is necessary to make the length of the concentric circle where the slit hole 3 exists 5 to 20% of the circumference. This translates into an angle of 18 to 72 degrees. Further, it is desirable that the inner side and the outer side surface of the slit hole are formed into concentric arc shapes because the width of the slit hole during rotation can be clearly seen. The narrower the width of the slit hole 3 is, the more accurately the position can be grasped. However, the width is usually about 3 to 10 mm, and the larger the thickness of the substrate 1, the larger the width.

FIG. 2 shows an embodiment of the diamond blade of the present invention used for cutting at a depth of 150 mm.
The substrate 1 of FIG. 2 has a radius of 225 mm, and from its outer edge,
They are provided at positions of 50 mm, 100 mm, and 150 mm, that is, on concentric circles with radii of 175 mm, 125 mm and 75 mm. The width of all the slit holes 3 is 6 mm, but the length is 23 mm 50 mm inside from the outer circumference and 1 mm when 100 mm.
The ones at 6 mm and 150 mm are 10 mm long, and the total length of the slit holes on each concentric circle is about 16% of the length of each circle. In the present invention, when providing several rows of slit holes, it is desirable to keep the ratio of the total length of the slit holes and the concentric circumference approximately constant, because the positions of the slit holes in each row during rotation are uniform. .

When a plurality of rows of slit holes are provided as in this embodiment, the size of each slit hole is fixed and the number is changed for each row, so that the ratio of the total length of the slit holes is approximately constant. Can also be aligned. When the diamond blade of the embodiment of FIG. 2 rotates at a high speed, three concentric fenestration lines appear, and the cutting depth can be determined by comparing this with the edge of the object to be cut. When the diamond blade of the present invention is used, for example, a blade for cutting a road or the like has a different outer diameter according to the cutting depth.

Normally, a diamond blade substrate having a diameter of about 30 cm is used for a work having a cutting depth of 5 cm, a diamond blade having a diameter of about 35 cm is for a cutting depth of 10 cm, and a diamond blade having a diameter of about 45 cm is used for cutting. For example, a diamond blade having a large size is used every time the cutting depth is increased by 5 cm, for example, for a blade of 15 cm. Therefore, in the case of a 30 cm blade, a hole can be provided at a position 5 cm from the outer circumference as shown in FIG. 1 and the blade can be used for cutting at a depth of 5 cm or less.

Similarly, in the case of a diamond blade of 35 cm, two rows are arranged at 5 cm and 10 cm from the outer periphery of the substrate.
In the case of a 45 cm diamond blade, slit holes can be provided on three lines of 5 cm, 10 cm and 15 cm from the outer periphery of the substrate as shown in FIG. In these embodiments, since the center of each slit hole is a distance from the outer periphery of the substrate, when the thickness of the diamond chip is taken into consideration, when the cutting is performed just to the position of the slit hole, each slit hole has a predetermined depth. It means that it has been cut.

[0013]

[Effect of the Invention] The use of the diamond blade of the present invention is convenient because the work can be performed while checking the cutting depth at the position of the through hole without the need for a separate tool for the gauge. In addition, since a hole is formed in the substrate and this is used as a gauge, the identification mark does not peel off as in the case of identification with paint, and the blade can be used for the life of the blade. Although the holes are formed in the substrate, the reduction of the strength of the substrate due to the holes is small, and the high-speed rotation prevents the cutting powder from clogging the holes, so that the work can be suitably performed.

[0014]

[Brief description of the drawings]

FIG. 1 is a side view of a diamond blade according to one embodiment of the present invention.

[0015]

FIG. 2 is a side view of a diamond blade according to another embodiment of the present invention.

[0016]

FIG. 3 is a side view of a conventional diamond blade.

[0017]

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Disc-shaped substrate 2 Diamond chip 3 Through slit hole 4 Diamond blade center

Continuation of the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B24D 5/12 B24D 5/00 B24D 3/00 320

Claims (3)

(57) [Scope of request for utility model registration] 1. A diamond blade having a diamond chip mounted on an outer periphery of a disk-shaped substrate , wherein a plurality of cuts are made on a circumference where the disk-shaped substrate is concentric with its outer circumference.
A diamond blade having a through hole for detecting depth only, wherein the total length of the through holes on a concentric circle is 5 to 20 % of the length of the concentric circle. 2. The diamond blade according to claim 1, wherein the cut depth detecting through-hole is a slit hole, and the longitudinal direction of the slit hole is concentric. 3. The diamond blade according to claim 1, wherein the through holes for detecting the cut depth are present on a plurality of concentric circles.