JP3180248B2 - 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 stone, concrete, asphalt and the like in the stone industry or civil engineering field.

[0002]

2. Description of the Related Art At present, diamond blades are used for cutting stones, concrete, asphalt and the like, but the cutting efficiency, cutting accuracy and cutting cost are not always satisfied.

That is, a conventional diamond blade has a thickness of 3 mm to 4 m, as shown in FIG.
The chip 3 having a thickness of 4 mm to 5 mm is evenly attached to the outer periphery of the base metal 4 by means such as brazing. The attached chip 3 is the sixth chip.
As shown in the figure, it has a rectangular parallelepiped shape having a length a and a thickness b.

In such a conventional diamond blade, means for improving sharpness (cutting load) include reducing the thickness of the chip and shortening the length of the chip.

However, when the thickness of the chip is reduced, it is necessary to reduce the steps e1 and e2 (FIG. 7) between the chip 3 and the base metal 4. Therefore, the steps e1 and e2 between the chip and the base metal cannot be maintained until the life of the blade, and it is not preferable to reduce the thickness of the chip. On the other hand, in order to maintain the steps e1 and e2 between the chip and the base metal, the base metal thickness d may be reduced. However, in this case, the strength of the blade cannot be maintained, which is not preferable.

On the other hand, if the length of the chip is reduced, the mounting area of the chip to the base metal is reduced, so that the mounting strength between the base metal and the chip is reduced, which is not preferable. In order to shorten the chip length and maintain the ratio of the chip occupying the outer periphery of the base metal, it is necessary to increase the number of chips, but this is not preferable because the cost is increased. Further, when the number of chips attached to the outer periphery of the base metal is small, the gap C between the chips at the outer periphery of the base metal (FIG. 6) is widened, so that the vibration at the time of cutting increases, the life of the blade is shortened, and the cutting accuracy is reduced. Causes a decline.

[0007]

The problem to be solved by the present invention is to reduce the cutting efficiency and cutting accuracy or increase the cutting cost, which has been a problem in the past, and to improve the cutting efficiency and cutting accuracy. Another object of the present invention is to provide a diamond blade capable of reducing the cutting cost.

More specifically, the same effect as reducing the length of the chip by shortening the contact length between the chip and the work material without widening the gap between the chip and the chip is obtained. A diamond with a chip structure that makes it possible to make the chip thinner or the base metal thicker by reducing the step compared to the conventional one, improving cutting efficiency and cutting accuracy, and lowering the cutting cost. To provide a blade.

[0009]

According to the present invention, there is provided a chip having a long side and a short side opposed to each other in a cutting direction, wherein the chip thickness is a thickness of a portion corresponding to the short side length of the chip. A diamond in which a plurality of chips of the same shape, each of which is configured to be larger than the thickness of the portion other than the portion concerned, is attached on the outer periphery of the base metal so that long sides and short sides are alternately arranged. Provide a blade.

In general, when cutting a material such as a stone material using a diamond blade, the outer peripheral surface of the blade (the tip in the circumferential direction of the tip), which is the portion that performs the cutting action, is cut as shown in FIG. It wears in a "camel-like shape."
As a result, the blade receives a large force from the side of the blade during the cutting operation, and the blade moves in a meandering manner, thereby increasing the wear in the thickness direction of the chip.

When the cutting depth is deeper, the energy consumption due to the friction on the side surface of the blade increases.

[0012] Friction on the side surface of the blade is reduced by shortening the length of the chip or reducing the number of chips arranged around the base metal. However, in this case, the vibration at the time of cutting is increased, and the "kamaboko" -like wear of the outer peripheral surface of the blade is promoted, cutting accuracy is reduced, and the life of the blade is shortened.

[0013]

Embodiment 1 FIG. 1 shows an example of a chip according to the present invention.
The chip 1 has a long side F and a short side G in the cutting direction, and F> G
It is. The thickness n of the chip 1 is n = k + j + i, k + j
<I>, and the ratio of the lengths of F and G and the ratio of the widths of n, k, j and i differ depending on the material or purpose to be processed.

FIGS. 2 and 3 show a state in which the chip 1 according to the present invention is mounted on the outer periphery of the base 2, and the chips 1 are arranged in a staggered manner on the outer periphery of the base 2.

In the blade according to the present invention, the gap h between chips and chips (FIG. 1) and the number of chips are made the same as the gap c between chips and chips of a conventional blade (FIG. 6) and the number of chips. = F and F> G.

Here, when G = ２ F, the friction on the side surface of the blade is reduced to 5/6 that of the conventional blade.

When G = ２ F, as described above, the thickness n of the chip 1 is n = k + j + i, k + j <i
Therefore, the central portion of the chip thickness always has the chip length G. For this reason, the ratio of the bottom area of the chip to the outer periphery of the base metal of the blade in the thickness direction of the chip is 1 in the side surface and 5/6 in the center. As a result, the abrasion resistance in the direction of the height L of the tip (FIG. 5) is such that the side surface is greater than the center portion, and the abrasion of the outer peripheral portion of the blade is suppressed. By suppressing the abrasion, the force received from the side surface of the blade is reduced, the meandering during blade movement is reduced, and the wear in the thickness direction of the chip is reduced. As a result, the steps m1 and m2 (FIG. 5) between the tip and the base metal can be made smaller than those of the conventional blade. The sharpness (cutting load) can be improved by making the thickness of the chip thinner than before. Alternatively, by making the thickness of the base metal thicker than before, the strength of the blade can be increased, and the cutting accuracy can be improved.

Further, the blade according to the present invention can eliminate the gap between the chips by increasing the number of chips or adjusting the length of the chips (h = 0), and can reduce the vibration caused by the gap between the chips. Thus, chipping of the cut surface can be suppressed.

[0019]

Example 2 Example 2 shows an experimental result relating to comparison of sharpness (cutting load).

In Example 2, the blade specifications were as follows. Blade diameter: 22 inches Tip: Fig. 1 Tip gap h> 0

The workpiece is granite, and the cutting conditions are as follows. Blade rotation speed: 1700 rpm Workpiece feed speed: 6 m / min Depth: 7 mm / time Cooling water: 20 L / min

Under the above conditions, the sharpness (cutting load) of the blade according to the present invention was compared with that of the conventional blade using the power consumption as an index. Conventional blade: 20 amp Blade according to the present application: 16 amp

The experimental results show that the blade according to the present application
This shows that the power consumption is lower than that of the conventional blade.

[0024]

Example 3 Example 3 shows the results of an experiment relating to comparison of wear of the chip thickness.

In Example 3, the blade specifications were as follows. Blade diameter: 22 inches Tip: Fig. 1 Tip gap h> 0

The workpiece is granite, and the cutting conditions are as follows. Blade rotation speed: 1700 rpm Workpiece feed speed: 6 m / min Depth: 7 mm / time Cooling water: 20 L / min

Under the above conditions, the wear amount of the chip thickness according to the present invention was compared with that of the conventional blade by the wear amount of the thickness when the height wear was 5 mm, and the result was as follows. Conventional blade: 0.5 mm Blade according to the present application: 0.1 mm

The experimental results show that the blade according to the present application
This shows that tip thickness wear is reduced compared to conventional blades.

[0029]

Example 4 Example 4 shows the results of an experiment on a comparison of the notch width at the lower part of the cut surface of the workpiece (the height L direction width of the portion rounded in a semicircular shape).

In Example 4, the blade specifications were as follows. Blade diameter ... 22 inches Tip ... Figure 1 Tip gap h <0 (overlapping)

The workpiece is granite, and the cutting conditions are as follows. Blade rotation speed: 1700 rpm Workpiece feed speed: 6 m / min Depth: 7 mm / time Cooling water: 20 L / min

Under the above conditions, the notch width at the lower portion of the cut surface according to the present invention was compared with that of the conventional blade, and as a result, was as follows. Conventional blade: 3 mm Blade according to the present application: 1.5 mm

The experimental results show that the blade according to the present application
This shows that the notch width below the cut surface is smaller than that of the conventional blade.

[0034]

As will be described in detail in each embodiment, the diamond blade according to the present invention has various remarkable effects as compared with the conventional diamond blade.

Since the friction of the side surface of the blade is reduced and the ratio of the chip occupying substantially the outer periphery of the base metal is reduced, the efficiency (cutting load) can be improved with good sharpness.

The vibration of the blade is suppressed, and damage to the workpiece is suppressed.

[0037] The semi-abrasive wear on the outer peripheral portion of the chip is suppressed and the accuracy is improved.

The wear of the thickness is suppressed and the actual chip thickness can be reduced, so that the sharpness (cutting load) can be improved.

[Brief description of the drawings]

FIG. 1 is a partial perspective view of a diamond blade according to the present application.

FIG. 2 is a partial side view of the diamond blade shown in FIG.

FIG. 3 is a partial front view of the diamond blade shown in FIG. 1;

FIG. 4 is a partial side view of the diamond blade shown in FIG. 1;

FIG. 5 is a partial front view of a conventional diamond blade.

6 is a partial perspective view of the diamond blade shown in FIG.

FIG. 7 is a partial side view of the diamond blade shown in FIG. 5;

FIG. 8 is a partial perspective view showing a worn state (camel-shaped) of a conventional diamond blade.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Chip concerning this application 2 ... Base metal according to this application 3 ... Conventional chip 4 ... Conventional metal base

──────────────────────────────────────────────────続 き Continued on the front page (58) Fields surveyed (Int. Cl. ⁷ , DB name) B24D 5/06 B24D 3/00 B28D 1/24

Claims (1)

(57) [Claims] 1. A chip having a long side and a short side opposed to each other in a cutting direction, the cutting direction of a center portion in a thickness direction of the chip.
The length is equal to the length of the short side, and the chip thickness is a plurality of the same shape in which the thickness of the portion corresponding to the short side of the chip is configured to be larger than the thickness of the portion other than the portion. A diamond blade with chips attached on the outer periphery of the base metal in a staggered fashion such that long sides and short sides are alternately arranged.