JPH04106165U - dry cutting blade - Google Patents

Abstract

(57) [Summary] [Structure] In a cutting blade in which a diamond segment 1 is fixed to the outer periphery of a substrate 2 made by bonding two steel plates, an annular groove is provided on the bonded surface of the substrate 2 to serve as a passage for cooling air. 3, and a through hole 4 that supplies air to this annular groove 3.
was formed. [Effect] As the blade rotates, air automatically enters the annular groove, and this air cools the board, preventing thermal deformation or bending of the board.

Description

[Detailed explanation of the idea]

0001

[Industrial application field]

The present invention uses cutting blades, more specifically, A dry cutting tool that can dry-cut paved roads, dirt floors, runways, etc. Regarding raids.

0002

[Conventional technology]

As a conventional dry cutting blade, for example, the blade described in Japanese Utility Model Application No. 1-164066 is things are known. This cutting blade has many connections between the thickness of the board. A hole is opened in the fixed part of the diamond chip, and compressed air from the communication hole is directed to the fixed part. It is something that is sprayed.

0003

[Problem that the idea aims to solve]

However, with this cutting blade, compressed air is applied to the fixed part of the diamond tip. The substrate itself is not cooled, especially if it comes into contact with the material to be cut. The problem is that the maximum depth of cut of the board becomes hot, causing thermal deformation and bending. Ru. Another problem is that compressed air needs to be mechanically injected, which complicates the structure. There is.

0004 Therefore, the present invention cools the substrate with air without requiring mechanical operations, allowing it to undergo thermal deformation. The purpose of the present invention is to provide a dry cutting blade that does not cause bending or bending.

[0005]

[Means to solve the problem]

The dry cutting blade of this invention is made by bonding two steel plates together to achieve the above-mentioned problems. In a cutting blade with a diamond segment fixed to the outer periphery of a , an annular groove that serves as a passage for cooling air on the bonding surface of the substrate, and an annular groove that serves as a passage for air for cooling; It is characterized by forming a through hole for supplying.

[0006]

[Effect]

As the blade rotates, air enters the annular groove from the through hole and cools the board. Ru.

[0007]

【Example】

FIG. 1 is a partially cutaway plan view showing an example of a dry cutting blade, and FIG. FIG.

[0008] In the figure, 1 is a diamond segment, which is laser welded to the outer periphery of the substrate 2. are arranged at regular intervals.

[0009] The substrate 2 is formed by bonding two steel plates 2a and 2b together, and an annular groove 3 that serves as an air passage is formed in the mating surfaces. This annular groove 3 is formed approximately concentrically with the substrate, and is provided at the maximum cutting portion where the material to be cut and the substrate 2 come into contact and are likely to reach high temperatures. In this example, the cut into the workpiece is 50 mm, and an annular groove 3 with a diameter of 10 mm in the radial direction and 0.5 mm in the thickness direction is formed at a position with an inner diameter R ₁ = 110 mm and an outer diameter R ₂ = 120 mm from the center of the substrate 2. was formed.

0010 4 is a through hole that penetrates the substrate. This through hole 4 has the annular groove 3 at its tip and the substrate. It is an oblong hole that is formed toward the inside, and has a rake angle to scrape out chips. To achieve this effect, it is tilted from the normal direction to the rotational direction by α=10° to 30°. Ru.

[0011] In addition, at the tip of the through hole 4 where the annular groove 3 is located, as shown in FIG. On the other hand, a notch 5 is provided on the rear side by partially cutting out the base plate 2, so that when the blade rotates, This enhances the effect of air insertion into the annular groove 3.

0012 In the above configuration, when the cutting blade is rotated, an annular shape is automatically formed from the through hole 4. Air is introduced into the groove 3 and flows through the annular groove 3, thereby cooling the substrate 2 from the inner surface. As a result, thermal deformation of the substrate 2 can be effectively prevented.

[0013] A cutting experiment was conducted under the following conditions, and the slit temperature, thermal deformation, and noise were measured. Established.

[0014] Blade dimensions: ^{12 ″} x 40 ^L x ^{3.4 T x} 7 Annular groove: inner diameter 110 mm, outer diameter 120 mm As a comparative example, a single plate blade without an annular groove was used.

[0015] The results show that in the comparative example, the substrate slit temperature was 70°C, and the deformation (surface wobbling) was 0.28 mm. In contrast, in the example, the substrate slit temperature was 45°C, and the deformation (surface wobbling) was 0. It was good at 0.09 mm.

[0016] Also, when the noise during cutting was measured, the comparative example had a maximum of 103 dB and the frequency at the maximum peak was 4,550 _Hz , whereas the example had a maximum of 87 dB and the frequency at the maximum peak was 2. , 600Hz, _which was good.

[0017] As you can see, the dry cutting blade of this example has a cooling effect on the board. It is excellent in terms of performance and can also reduce noise.

[0018]

[Effect of the idea]

As explained above, the dry cutting blade of this invention is made by bonding two steel plates together. An annular groove is formed on the bonded surface of the structured substrate to serve as a passage for cooling air, and A through hole is provided to supply air to the annular groove, so it is automatically emptied by the rotation of the blade. Air enters the annular groove, and this air cools the board, preventing it from thermal deformation or bending. No damage occurs.

[Brief explanation of drawings]

FIG. 1 is a partially cutaway plan view of a dry cutting blade.

FIG. 2 is a sectional view taken along line AA in FIG. 1.

FIG. 3 is an enlarged view of a main part of a through hole.

[Explanation of symbols]

1 Diamond segment 2 Board 3 Annular groove 4 Through hole 5 Notch

Claims (1)

[Scope of utility model registration request] 1. A cutting blade in which a diamond segment is fixed to the outer periphery of a substrate made of two steel plates bonded together, wherein the bonded surface of the substrate has an annular groove that serves as a passage for cooling air, and an annular groove in which air is provided. A dry cutting blade characterized by forming a through hole for supplying.