JPH042410A - Rotary base for saw blade and saw blade - Google Patents

Abstract

PURPOSE:To restrain vibrations by forming at nearly equal intervals a plurality of S-shaped slits inclined toward the rotary center with reference to a circumference near the outer edge of a rotary base and filling a filler in the slit to be united with the rotary base. CONSTITUTION:S-shaped slits 4 are provided at nearly equal intervals to have the upper curve along a first circumference 7, the lower curve along a second circumference 8 and the straight face inclined to the center O, and may be provided therein with the appropriate number of discontinuous parts 5. The total length of a base can be elongated without reducing the toughness of the base by the disposition of the slits 4. The S-shaped slit 4 is filled with a filler prepared with synthetic resin and seal material having heat resisting property, pressure resisting property and vibration-proof property. The synthetic resin having the adjustable hardness, water proof property, metallic adhesive property which prevents the synthetic resin from dropping out of the slit by a centrifugal force and low viscosity for facilitating the filling of the resin is suitable, and for example the seal material including asbestos and glass fibers is used.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a rotating board for a saw blade used for cutting stone, concrete, etc., and a saw blade using the same board. The aim is to suppress the noise emitted by the

[Prior Art] A saw blade that can prevent the noise generated by the saw blade is disclosed in Japanese Patent Publication No. 10040/1983. In this saw blade, a suitable width, for example 1.
5 mm, a plurality of grooves having an appropriate length, for example, about 10% of the outer diameter of the saw body, are formed at equal intervals, and each of the grooves is filled with a hardening synthetic resin that is softer than the rotating substrate. It is shown fixed in the groove.

According to this configuration, when rotating, the low sound waves from the curable synthetic resin filling layer interfere with the sound waves generated from the blade,
Overall, it is explained that it interferes with the synchronization and resonance of sound waves, changing simple high tones into complex low tones, and eliminating high, sharp metallic sounds.

In fact, the blades formed around the rotating base rotate at high speed and create turbulence in the air, producing sound.This turbulence causes external force to vibrate in the receiver, or is caused by external force due to the load on the material to be cut. It is thought that this vibration is forced to vibrate at the receiver, and that this vibration resonates with the vibration of the rotating board and generates a loud sound. In this regard, what is described in the above-mentioned publication is that a plurality of grooves are provided approximately at the center from near the base of the blade portion, and this is filled with a hardening resin that is softer than the blade to serve as a buffer zone for vibration propagation. It is understood that the propagation of vibrations in the rotating substrate is partially stopped, and it is thought that resonance is also reduced.

[Problem to be solved] However, in the device described in the above publication, there is a vibration buffer band in the radial direction from the center, so that the vibration generated by the blade portion is suppressed in the circumferential direction on the rotating substrate. However, it is thought that the vibrations generated in the blade portion are reflected at the center, and the resulting vibrations cannot be sufficiently suppressed.

[Means for solving the problem] From the above point of view, the present invention aims to reduce the vibrations from the blades (serrations) around the rotating substrate, which cause large vibrations, not only in the circumferential direction on the rotating substrate, but also in the circumferential direction of the rotating substrate. The structure is made up of a plurality of S-shaped slits that are inclined toward the center of rotation of the rotating substrate with reference to the circumference near the outer edge of the rotating substrate. Form the slits at equal intervals and fill the slits with filler.
It is intended to be integrated with the rotating board.

Furthermore, the present invention also presents an embodiment in which the grooves between the multiple blades formed on the outer periphery of the substrate are filled with a filler in the same manner as described above to integrate the rotating blades.

The present invention will be explained below with reference to embodiments shown in the drawings.

FIG. 1 shows the entire rotating board for a saw blade according to the present invention.

1 indicates a rotating board. The rotating board 1 is formed into a circular shape by punching out a steel plate or a stainless steel plate, 2 is a shaft hole formed in the center of the rotating board 1, 3 is a blade,
4 indicates a 8-character slit. This S-shaped slit has 5
It is preferable to provide a discontinuous portion like this.

FIG. 2(A) is an enlarged view of the portion surrounded by BB in FIG. 1, and FIG. 2(rl) is an enlarged cross-sectional view of FIG. 1A-A. In the figure, 6 indicates the filled filler.

As shown in Figure 1, in this example, the board diameter is 44 inches and S
Eight letter-shaped slits are formed. Usually, substrates with a thickness of 4 to 9.5 m + a1 diameter of 30 to 100 inches (75 to 254 cm) are often used.

The center of the rotating substrate 1 is set to 0, a first circumference 7 is set near the outer edge of the rotating substrate 1, and a second circumference 8 is set inside the first circumference 7.
Set.

Therefore, the S-shaped slits are arranged at approximately equal intervals such that the upper curved surface is along the first circumference, the lower curved surface is along the second circumference, and the straight surface is inclined with respect to the center O. Provided for.

This S-shaped slit 4 is formed by a laser processing machine, and both ends of each slit are processed to be rounded, and the appropriate slit width is about 0.4 mm. An appropriate number of discontinuities may be provided within the S-shape, such as for internal reasons.

In the above, the difference between the first circumference 7 and the second circumference 8! , the radius r of the curved surface 69 between it and the slit 4, and the inclination angle of the straight surface are related to the mechanical strength of the rotating substrate 1 under cutting load.

This type of slit shape and arrangement does not weaken the stiffness of the substrate (the rigidity of the substrate to support the blade within a predetermined plane during high-speed rotational grinding), and increases the total length of the slit itself. This increases the amount of filler and improves the silencing effect.

Further, each of the eight-figure slits 4 may have the same shape, or may have a slight difference.

All the S-shaped slits 4 are filled with a filler made of a synthetic resin mixed with a heat-resistant, pressure-resistant, and vibration-resistant sealant. The synthetic resin filled here can be adjusted in hardness from rigid to flexible, has water resistance that does not dissolve in cutting water, and has strong metal adhesion that will not come off due to the centrifugal force caused by high rotational speeds. A material with low viscosity that is easy to fill and is easy to fill is optimal.As a sealing material, for example, asbestos,
A material containing glass fiber is used, and the filler shall have a hardness lower than that of the rotary substrate after flaking.

[Test examples] Diameter: 40, [io, 72, 100 inches (approximately 10
0-254cm), thickness 5.0-7.0. [i, 5~
A rotating board (normal board) of 9.0 mm and a width of 0.0 mm on the same board.
A 2mm S-shaped slit (slit processed substrate), a base material of low viscosity, flexibility and adjustable epoxy casting resin of 40 or more, a hardening agent of 55 or less, and a heat-resistant, pressure-resistant, and vibration-resistant sole agent lO for all slits. A material (resin-filled substrate) was prepared by injecting and curing a filler selected by weight from ~+5 (all weight %), and a sound-dampening effect test was conducted. Table 1 shows the results.

Note that the measurement distance was measured using a 1 m 1 measuring instrument, NA-09 manufactured by Hir-On Co., Ltd., on the A scale.

Table 1 On the other hand, the size of Table 1 above is 40 inches (approximately 100 cm + m)
The same formulation as above was added to the above-mentioned publication by forming the four grooves from the vicinity of the base of the sawtooth part toward the center with a groove width of 1.5 ma+ and a length of 4 inches (approximately 10 cm). When we filled it with a synthetic resin filler and tested the silencing effect under the same conditions, the results were 94 dB and 1, eh.

Next, a rotary blade of the present invention using the slit-processed substrate will be explained with reference to FIGS. 3(A) and 3(B).

Fig. 3 (A) shows the part corresponding to the blade around the board in Fig. 1, and 7 is a U-groove formed at equal intervals on the outer edge of the board 1 to allow grinding powder to escape. , This is the part that becomes the heat dissipation part. A chip made by integrally sintering diamond powder with metal or another chip 9 made by sintering tungsten carbide is fixed as a blade by brazing or welding to the entire base part 8 formed by the U groove 7, thereby forming a blade. This point is no different from the conventional one.

Next, in the present invention, the U-groove 7 is filled with a filler 6 having the same composition as the filler described above. However, the compositions do not necessarily have to be the same. In this case, the upper surface l of the filler 6
O is placed in the groove, leaving a groove with sufficient depth for the chips 9 in front and behind.

Figure 3 (b) shows a keyway II instead of the embodiment (a) above.
Indicates what is equipped with. Regarding filling of filler 6 (a)
There is no difference from what is shown in .

A rotating blade is thus formed.

[Test Example] Diameter: 40 inches, thickness: 5. S-shaped slits are formed in the OI rotating substrate, each slit is filled with a filler, and around the rotating substrate, chips are fixed to the entire base as described above, and the U-groove is filled. A prototype rotating blade filled with the agent was made and rotated at 550 r, l) and +a without applying any grinding load. 12d
It was B.

When the latter was subjected to grinding with a load applied and the same measurements were taken, !
It was 00dB. This was found to be about 1 OdB lower than the conventional one with the same shape but without any noise reduction on the rotating board.

However, the strength of the substrate of the present invention was slightly lower than that of the substrate of the present applicant, which had semicircular slits arranged alternately, but this did not pose a problem in practical use. It is easy to manufacture and highly practical.

Furthermore, in the above embodiments, the blade has a fixed tip, but the shape of the tip may be a short cane, a tapered shape, or a stepped step shape, and the tip is not fixed but may be shaped like a step. A removably attached cassette structure as shown in Fig. 4 can be used more effectively.

In FIGS. 4(A) and 4(B), reference numeral 1 indicates the outer side of the substrate, and a cassette base metal 12 having a U-shaped cross section is fixed to the outer end face by welding or the like. Reference numeral 9 denotes a chip, and a cassette base metal 12 having a U-shaped cross section is fixed to the inner end surface of the chip by welding or the like. One of the upper and lower sides of the two-sided set base metal is long, and the outside of the long side is fixed to the chip as well as the body so that the U-shaped parts intertwine and fit together.

The inside of the long side has an acute taper 14 in the cross-sectional direction,
Tapered surfaces 1 that correspond to each other in the length direction and slope in opposite directions.
5 is formed.

The short sides 17 are fitted into the U-shaped recesses 111i on the other side, so that in the cross section and the direction perpendicular to the cross section,
Surface 1 corresponding to the taper 14 and tapered surface 15
8 is formed.

As shown in the figure, a large number of cassette base metals 12 are fixed on the outer edge of the substrate 1 at intervals, but the tapered surfaces 15 are fixed so that one direction of the taper is all aligned in the same direction.

and a cassette base 1 fixed to a large number of chips 9 respectively.
2 are tapered fitted to the respective parts fixed to the substrate 1 in the direction of the arrows in FIG.

Of course, the direction of rotation or movement of the substrate during cutting is opposite to the direction of the arrow, and the bond is strong.

[Effects of the Invention] Based on the above results, the present invention has the advantage of forming an S-shaped slit and filling it with a filler containing a synthetic resin and a sealant to integrate it with the substrate. The sound-dampening effect is sufficient compared to those filled with synthetic resin.In addition, rotating blades in which the blades are fixed at the required strength section and the grooves between the blades are filled with filler have a sufficient sound-damping effect as described above. This improves the working environment when using this type of rotating blade. It is also more practical if the chips are mounted in a cassette structure.

[Brief explanation of the drawing]

FIG. 1 shows a rotating board embodiment of the invention. FIG. 2(A) is an enlarged view of the section BB in FIG. 1, and FIG. 2(B) is an enlarged view of the section taken along the line A-A in FIG. FIGS. 3(A) and 3(B) respectively show embodiments of the rotating blade of the present invention. FIG. 4 (()(0) shows another chip mounting structure in the present invention. 1... Rotating board, 2... Shaft hole, 3... Blade,
4゜5...Semicircular slit, 6...Filler, 7...
・U groove, 8... Base part, 9... Chip, IO... Filler top surface, 11... Keyway. 11t Figure applicant Representative of Osaka Diamond Industry Co., Ltd. Katsura Oura - Kaya (t7) Saizu (a)

Claims (2)

[Claims] (1) forming a plurality of S-shaped slits that are inclined toward the rotation center of the substrate based on the circumference near the outer edge of the rotating substrate at approximately equal intervals, and filling the slits with a filler; A rotating board for a saw blade, characterized by being integrated with a rotating board. (2) A saw blade according to claim (1), wherein a large number of grooves are formed on the outer edge of the rotary base plate, and the blade is mechanically fixed integrally or removably to the platform formed by the grooves.