JPS58102677A - Diamond saw - Google Patents

Abstract

PURPOSE:To aim at enjoying sharpness in a segment type together with toughness existing in a continuous type, by constituting its structure in setting numerous grooves at both sides of a cutting part, particularly in case of the sintered cutting part of a diamond saw. CONSTITUTION:A continuous type circular saw is composed of a steel circular plate 1 and a sintered cutting part 2. Likewise, the sintered cutting part 2 is made up of a sintered body consisting of a mixture of diamond abrasive grains and bonding metal powder. In addition, the cutting part 2 is provided with plural number of a groove 3 and each of these grooves 3 has an opening part in a peripheral part 4 at both sides, obverse and reverse. Further, at the peripheral part of the circular steel plate 1, a thin part is made up and, sandwiching this thin part from both sides, the cutting part 2 is simultaneously sintered. Furthermore, the groove 3 is so made up that it is arranged in a phase shift of its setup position at both sides, obverse and reverse. With this constitution, the sintered cutting part of this diamond saw not only enjoys sharpness in a segment type but holds toughness of a continuous type.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to improvements in the sintered blade portion of diamond saws, particularly diamond saws.

There are two types of tools known as tools for cutting hard materials: circular saws and plate saws.Circular saws include continuous type (also called rim type) and segment type, and plate saws include gang saw, gang saw, and plate saw.
It is broadly classified into Pantone. The advantages and disadvantages of these known various types of nozzles are listed below.

(1) Continuous type saws have a structure in which a layer of abrasive grains is continuously fixed to the outer periphery of a steel disc, so there is no striped pattern on the cut surface of the material to be cut due to the feed rate, and the finished surface is It's beautiful and there are fewer accidents where the saw breaks. However, it has the disadvantage of slow cutting speed.

(2) Segment type No. has a structure in which a segment-shaped abrasive grain layer is fixed to the outer periphery of a steel disc at intervals, so the corner of each segment acts as a cutting edge, increasing the cutting speed. It is. However, there are disadvantages in that a striped pattern is generated on the finished surface due to the feed of the saw, and the segments are likely to break.

(3) Plate saws include gang saws and band saws, and the means for fixing the abrasive grain layer is the same as that of the segment type saw described above, so the advantages and disadvantages in use are also substantially the same as in (2) above.

The present inventor has succeeded in developing the present invention as a result of intensive research aimed at making use of the advantages of these conventional products and eliminating various drawbacks.

The present invention provides a diamond saw in which a sintered blade made of diamond abrasive grains and bonding metal powder is fixed to a steel plate. According to the present invention, a diamond saw for cutting hard materials is provided with grooves and the positions of the grooves are shifted from each other in phase between the front and back sides. By increasing the cutting speed and improving the strength of the abrasive layer, it prevents the abrasive layer from peeling off and breaking.
Safety during use is improved, and the amount of abrasive layer used can be reduced, reducing costs and extending the life of the saw.

An example of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a plan view of the continuous type circular saw of the present invention, and FIG. 2 is a side view of FIG. 1.

Figures 3 and 4 show the state in which the sintered blade is fixed to the steel plate. Figure 7 is a plan view of the plate-shaped saw of the present invention, Figure 8 is a side view of Figure 7, and Figures 9 and 10 are of the present invention. It is a graph comparing the amount of wear and power consumption between the invented product and the conventional product.

As mentioned above, FIGS. 1 and 2 show an example of a continuous type 1 circular saw, where 1 is a steel disc and 2 is a sintered blade. The sintered blade portion 2 is made of a sintered body b of a mixture of diamond abrasive grains and bonding metal powder. 3
are a plurality of grooves provided in the sintered blade, and the grooves 3 have openings at edges 4 on both the front and back sides of the sintered blade, as shown in the figure. A thin wall portion 6 is provided at the outer peripheral edge of the circular steel plate 1, and the sintering blade portion 2 is simultaneously sintered by sandwiching the thin wall portion 6 from both sides. The grooves 3 are arranged at shifted positions on both the front and back sides as shown in FIG. 2. The corners of the groove act as cutting edges, and since there are many of them, the cutting performance is improved and the cutting speed is increased. Furthermore, the discharge of chips is improved,
Since the heat dissipation capacity is also large, there is an effect that clogging does not occur.

As shown in FIG. 3, the thin wall portion preferably has a plurality of through holes 7, and the shape and size of the through holes are arbitrary, and are suitable for fixing the sintered blade portion. The sintered blades on both the front and back sides are integrated and simultaneously sintered, which helps increase strength.

FIG. 4 shows another embodiment of the thin wall portion, showing a structure in which a part of the thin wall portion 6 is replaced with a wire mesh 8, so that the integration of the sintered blade portion 2 is further enhanced. In Fig. 1, numeral 5 indicates a radial corrugated portion provided on the circular steel plate. By providing this corrugated portion, the strength of the circular steel plate is increased, and therefore, the cost can be reduced by using a thinner steel plate than conventional products. becomes possible. Note that the strength of the disk can be further strengthened by arranging the radial waveform in a radial direction that does not include the center of the disk.

When the outer diameter of the circular saw exceeds 300 m, a segment type circular saw may be used as shown in FIGS. 5 and 6. In FIGS. 5 and 6, 10 is a fan-shaped segment, and the segment is sintered in advance.

The arrangement positions of the large number of grooves 3 are shifted from each other in phase on both the front and back sides, similar to the examples shown in FIGS. 1 and 2. In the case of this example, a thin wall portion is not provided on the outer peripheral edge of the circular steel plate 1, and the fan-shaped segment is directly fixed to the outer peripheral portion 9 of the steel plate by brazing as in the conventional product, but the center of the fan-shaped segment is It is preferable to arrange a reinforcing perforated thin plate or wire mesh 11 as shown in FIG. The same is true.

7 and 8 show an example in which the present invention is applied to a so-called plate-shaped weight, a band saw or a gang saw. In this case, each segment is linear, and grooves 3 are arranged with a phase shift on both the front and back sides of each segment 12. be. This segment 12 is formed by sintering with a reinforcing perforated thin plate or wire mesh sandwiched inside the segment 12, and the method for fixing the segment 1216 to the substrate 1 is the same as with conventional products of this type. Attachment can be done by any means.

FIG. 9 and FIG. 10 are comparison graphs between the product of the present invention and the conventional product, and show the results of comparing the two under the following conditions.

(1) Free sample: A; Conventional segment type circular saw B; Circular saw of the present invention (Figures 1 and 2) (2) Dimensions: 10511J outer diameter for both, blade thickness 2
．． 0u (3) Material to be cut: Granite (from Inada) (4) Depth of cut = 7u (5) Feed of cut: 13067m1n (6) Number of revolutions: 12. OOORPM (7) Power source: Disc grinder As is clear from FIG. 9, the amount of wear of the product B of the present invention is about 60% or less of that of the conventional product A, and as is clear from FIG. It is clear that the product of the present invention does not consume more power even when the cutting depth increases, that is, the product of the present invention is superior in sharpness.

Since the present invention has the above-described configuration, it can exhibit the following excellent effects compared to conventional products.

(1) In the case of circular saws: a. It combines the advantages of both the continuous type and the segment type. That is, since there are many grooves on both sides of the blade, it has the sharpness of a segment type and the sturdiness of a continuous type.

b. By providing the above-mentioned grooves, chips can be discharged better and the heat dissipation capacity is increased, so clogging due to seizure does not occur, which helps to improve cutting quality and improves work efficiency.

A thin wall portion or wire mesh having a through hole is provided on the outer periphery of the C9 board,
Since the sintered blade part is sintered at the same time, the strength is increased and breakage of the blade part can be prevented, so safety is extremely high and the life span is also extended.

(2) In the case of a plate-shaped weight, a large number of grooves are arranged on the side surface of each segment, and it is further reinforced with a thin plate or wire mesh having through holes, so it has the same effect as the circular saw described above. This was confirmed as a result of the experiment.

(3) In either type, by providing a large number of grooves, the amount of the mixture of Guyamomondo abrasive grains and bonded metal powder used in the sintered blade portion can be reduced, making it economical in terms of cost.

[Brief explanation of the drawing]

Figure 1: A plan view of the continuous circular saw of the present invention. Figure 2: A side view of the circular saw described above. Figures 3 and 4. A diagram showing the relationship between the sintered blade and the steel plate. Figure 5: A plan view of the segment type circular saw of the present invention. Figure 6 Side view of the circular saw (4tfM+2) Figure 7 Plan view of the plate saw of the present invention Figure 8 Side view of the plate weight Figure 9 and 10 Performance comparison between the product of the present invention and the conventional product 1. Steel disc 2, sintered blade part 3, groove 4, edge part 5/corrugated part 6, thin wall part 7, through hole 8, wire mesh 9, steel disc external use part 10, fan-shaped segment 11, wire mesh or perforated thin plate 12, straight segment 13, wire mesh or perforated thin plate procedural amendment (method) April 15, 1980 Commissioner of the Patent Office Haruki Shimada 1 Indication of case 1983 Patent Application No. 193631 2 Invention Name Diamond Saw 3 Relationship with the person making the amendment Patent applicant Postal code 22
8 March 5, 1980 (Delivery date: March 30, 1988) 5 Subject of amendment Drawings and patent application submission 6 Contents of amendment 1 Drawing 1 showing Figures 9 and 1θ as shown in Attachment 1 (No change in content) 2 List of documents attached to the patent application submission section Figure 9 Figure 10 yp? tK 5 palms (m…)

Claims (8)

[Claims] (1) In a diamond saw in which a sintered blade made of diamond abrasive grains and bonding metal powder is fixed to a steel plate, a plurality of grooves having openings are provided at the edges of both the front and back sides of the sintered blade. A diamond saw for cutting hard materials, characterized by being equipped with. (2) The diamond saw for cutting hard materials as set forth in claim 1, wherein the grooves provided on both the front and back sides of the sintered blade portion are arranged at different positions. (3) Claim 1 in which the steel plate is a disc or a steel band
A diamond saw for cutting hard materials as described in section. (4) Hold the thin part of the edge of the steel disc on both sides and
A diamond saw for cutting hard materials as set forth in claim 1, which has a 5” sintered blade fixed thereto. (5) The diamond saw for cutting hard materials as set forth in claim 1, which has a plurality of through holes of arbitrary sizes and shapes in the thin wall portion of the edge of the steel disc. (6) Claim 1 in which a part of the thin wall portion is a wire mesh
A diamond saw for cutting hard materials as described in section. (7) The planar shape of the groove provided in the ring-shaped sintered blade portion is a linear shape having an arbitrary direction, or a curved shape is arranged in a radial shape for cutting hard materials as described in claim 1. diamond saw. (8) In the case of a hard or band-shaped steel disk as described in claim 1, in which the corrugated portions are arranged radially on the steel disc, a perforated thin plate or a wire mesh may be inserted between the steel discs. A diamond saw for cutting hard materials according to claim 1, wherein the segments are pre-sintered in a soldered state and fixed to the outer periphery of a disc or the end face of a strip steel plate by brazing. A diamond saw for cutting hard materials as set forth in claim 1, which are cement products, artificial stones\metal materials, and similar materials.