JP2519166B2 - Substrate for cutter - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure for a cutter substrate.

[0002]

2. Description of the Related Art In cutting work of stone, concrete, wood, metal, etc., a cutter in which a diamond tip, a super hard tip, etc. are fixed to the periphery of a circular steel substrate is used.

Since the cutting work is performed by rotating the cutter at a high speed, a considerable noise is generated.

As a measure for reducing noise, a substrate composed of a plurality of plates has been proposed, but the effect is not always sufficient.

[0005]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a cutter substrate capable of sufficiently reducing noise during use.

[0006]

According to the cutter substrate of the present invention, a large number of holes are formed in a radial direction and a circumferential direction in a cutter substrate in which chips such as diamond chips are mounted on the outer peripheral edge of a circular substrate. A steel inner plate, and a plurality of slits provided at appropriate places, and a pair of steel outer plates filled with an elastic member such as synthetic resin or rubber over the entire slits, The outer plate is integrally joined to both sides of the inner plate, and the large number of holes of the inner plate are closed by the outer plate to form an air layer.

The above substrate can be applied to a cutter used for stones, concrete, etc. having a diamond tip fixed to its periphery, and can also be applied to a cutter used for wood, metal, etc. having a cemented carbide tip fixed to its periphery. it can.

The shape of the holes is not limited to a circle, but may be other shapes such as a triangle and a polygon. The size and pitch are appropriately determined in consideration of strength and the like. Also,
The joining of the inner plate and the pair of outer plates is performed by spot welding, an adhesive, or the like.

The position and shape of the slit are appropriately determined in consideration of strength and the like. The filler may be any member that absorbs vibration, and is not limited to synthetic resin or rubber.

[0010]

In the cutter substrate of the present invention, the inner plate and the outer plate have different natural frequencies, and the vibrations interfere with each other.
Moreover, since an air layer is formed inside, vibration is absorbed. Further, the vibration is further absorbed by the elastic material filled in the slit.

[0011]

EXAMPLES As described above, as a measure for reducing noise, it has been proposed that the cutter substrates are joined by a plurality of plates. 1 and 2 show a modification of the cutter substrate by the present applicant and show a comparative example of the cutter substrate according to the present invention.

This cutter has a circular substrate 1. A radial cutout 2 is formed on the periphery of the substrate 1. A diamond tip 4 is fixed to the outer edge of the segment 3 formed by the cutouts 2.

The substrate 1 is made of steel and has a diameter of 550 mm, and the outer plates 1b, 1 are provided on both sides of the inner plate 1a.
c are joined to each other by spot welding. The inner plate 1a interposed in the middle has a plate thickness of 0.
6mm, diameter 3mm, pitch 5m over the entire surface
A plate with a large number of m holes 5 is used.
Outer plates 1 arranged on both sides of the inner plate 1a
The plates b and 1c have a plate thickness of 1.2 mm.

A weight was struck against the cutter substrate of the present comparative example and a conventional substrate having the same diameter (550 mm) and plate thickness (3.0 mm) as this substrate under the same conditions to generate noise. As a result of measuring the noise with a sound level meter, it was 105 to 109 dB in the conventional substrate, whereas it was 87 to 89 dB in the substrate of the present invention.

The applicant of the present invention has proposed a cutter substrate that further reduces noise as compared with the cutter substrate of the comparative example. 3 and 4 show an embodiment of the cutter substrate according to the present invention. The same components as those in the comparative example are designated by the same reference numerals, and detailed description thereof will be omitted.

The cutter of this embodiment has substantially the same structure as the above-mentioned control example. The difference from the cutter of the comparative example is that the outer plates 1b ', 1c' arranged outside
Is formed with a plurality of slits 6 arranged substantially evenly in the circumferential direction on the surface thereof.
Is only filled. In addition to rubber, an elastic member such as synthetic resin can be used as the filler.

Noise was generated by hitting the weight on the substrate of this embodiment under the same conditions as above, and the noise was measured by a sound level meter. As a result, it was 85 to 87 dB. . As a result, it can be seen that the noise was further reduced.

[0018]

According to the present invention, since a large number of holes in the inner plate are closed by the outer plate to form an air layer, vibrations are absorbed by the air layer. In addition, since the outer plate is provided with a plurality of slits and is filled with an elastic member, the inner plate and the pair of outer plates have different natural frequencies, and the outer plate itself is prevented from resonating. You can The combination of the inner plate and the outer plate can reduce the noise by interfering with the vibration, and can significantly reduce the noise as compared with the conventional one.

[Brief description of drawings]

FIG. 1 is a partial front view showing a cutter of a comparative example of the present invention with a part thereof cut away.

FIG. 2 is an enlarged partial cross-sectional view showing a structure of a peripheral edge portion in a cutter of a comparative example of the present invention.

FIG. 3 is a partial front view showing a cutter according to an embodiment of the present invention with a part thereof cut away.

FIG. 4 is an enlarged partial cross-sectional view showing the structure of the peripheral edge portion of the cutter according to the embodiment of the present invention.

[Explanation of symbols]

 1 Substrate 1a Inner Plate 1b, 1c, 1b ', 1c' Outer Plate 2 Notch 3 Segment 4 Diamond Tip 5 Hole 6 Slit 7 Rubber

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display location B28D 1/04 B28D 1/04 Z 1/24 1/24

Claims (1)

(57) [Claims] 1. A cutter substrate comprising a circular substrate and a chip such as a diamond chip mounted on the outer peripheral edge thereof,
An inner plate made of steel with a large number of holes formed in the radial and circumferential directions, and a plurality of slits formed at appropriate places, and the entire slits are filled with an elastic member such as synthetic resin or rubber. A pair of outer plates made of steel, wherein the outer plates are integrally joined to both sides of the inner plate, and the multiple holes of the inner plate are closed by the outer plates to form an air layer. Substrate for cutter.