JPS5810461A - Diamond saw for cutting stone of the like - Google Patents

Abstract

PURPOSE:To prevent deviation in cutting direction in such a way that the outer peripheral part sectional shape is held to be in concave shape, by arranging the tip which provides a portion where diamond grinding grain is not contained at the intermediate part of the tip, on the outer periphery of its base plate. CONSTITUTION:The columnar space at the center part of the tip in which the content of diamond grinding grain is less than at both outer side parts is integrated by the material which is composed of mixture of lead, lead alloy, copper, copper alloy, aluminum, aluminum alloy, nickel, or graphite particle integrated by coating copper and copper or copper alloy particle, or a plastic material. Thus, since the inner face of the thin part which is situated at both side parts of the columnar space 8 which has been provided in the middle of the tip is not brought into direct contact with the partner material, the life of the tip can be extended. Besides, because the outer peripheral section of the tip is ground into concave shape as seen at 5 in the figure, horizontal force does not arise, and deviation phenomenon does no appear in the cutting direction.

Description

[Detailed Description of the Invention] When cutting stones, etc. using a conventional diamond saw, the direction of the cut may change to a direction different from the planned course. Even if we tried to return to the old direction, we would not be able to return to the original direction, and the materials would often be rendered useless. This phenomenon is treated as a deviation phenomenon in the cutting direction, and is a phenomenon that occurs mainly when cutting heterogeneous materials such as stone and concrete containing various pebbles and gravel. This bias phenomenon is
It has been found that this problem often occurs when the cross-sectional shape of the outer periphery of the diamond saw is a convex R shape, and rarely occurs when the cross section is concave. However, it is extremely difficult to make the cross-sectional shape of the outer periphery of a diamond saw concave from the beginning of manufacture, and furthermore, it is also difficult to maintain the concave shape until the end of the life of the diamond saw. This invention relates to a diamond saw for cutting stones, etc., which can maintain a concave outer cross-sectional shape until the life of the diamond saw ends.

DESCRIPTION OF THE PREFERRED EMBODIMENTS The diamond saw for cutting stones, etc. of the present invention will be explained below with reference to the drawings. Fig. 1 is a partial front view of a conventional segment type die and diamond saw, Fig. 2 is a plan view of one conventionally used diamond tip, Fig. 3 is a sectional view taken along line AA' of the tip shown in Fig. Figure 4 is a diagram showing that the cross-sectional shape of the outer periphery becomes a convex R shape after the lapse of time, Figure 5 is a plan view when the tip tip is made concave, and Figure 6 is a diagram showing that Figure 7 is a diagram showing the cross-sectional shape of the outer peripheral part of the chip shown in Figure 5 when it is new, and Figure 7 is a diagram showing the shape of the BB' cross-section of the outer peripheral part in Figure 5 after the chip shown in Figure 5 has been used for a certain period of time. , 8.9, 10, 11, and 12.13 are diagrams showing various embodiments of the tip forming the diamond saw of the present invention, in which the plane of the portion not containing diamond abrasive grains provided at the center of the tip is shown. Show shape. Figure 1: 1 is the board, 2 is the chip, and 3 in Figure 2 indicates that the tip of the chip is flat, and the corners at the front end of the chip are at right angles when new. 31 indicates that the corners are made to form right angles. After use for a period of time, the tip whose tip corner and outer periphery corner are made at right angles will have a convex outer periphery cross-sectional shape at the AA' cross section in FIG. 2, as shown in FIG. 4. It shows that it will become like this. FIG. 5 shows a chip in which the tip of the chip is made into a concave shape as shown in FIG. Even if you keep it, after using it for a period of time
Figure 8.9, 1011.12.13 shows that the outer periphery of the tip wears into a concave shape as shown in Figure 8.9, 1011.12.13, where a portion not containing diamond abrasive grains is provided in the center of the tip for the diamond saw of the present invention. FIG. 10 is a drawing showing an embodiment of the core portion in the case where the diamond abrasive grains are not included, and the portions that do not contain the diamond abrasive grains form columnar spaces, and the planar shapes thereof are rhombic in FIG. 8, circular in FIG. 9, and circular in FIG. 10. When the chips are new, the corners of the cross section of the chips are made at 90 degrees as shown in Fig.
It wears in a concave shape as shown in FIG. Figure 8 8, Figure 9 9
, Fig. 10 10, Fig. 11 11, Fig. 12 12, 13
FIG. 13 shows the plan view of the portions that do not contain diamond abrasive grains, and these portions are either left hollow or made of the following materials. These materials include materials made by mixing lead, lead alloy, copper, copper alloy, aluminum, aluminum alloy, graphite powder coated with nickel or copper, and copper or copper alloy powder, or synthetic materials. A material softer than diamond abrasive grains, such as a resin material, shall be used.

The reason why the diamond saw of the present invention does not cause deviation in the cutting direction during cutting work such as stone until the end of its life will be explained below. First, in the conventional diamond saw, the square tip (Fig. ), the reason why the deviation phenomenon in the cutting direction is likely to occur will be explained. Diamond saws with fixed square tips are commonly used in the past, and it is known that the outer circumferential cross-sectional shape of this type of tips wears into a convex R-shape shortly after use. 0 When a diamond saw that has been worn into a convex R shape is being fed and the cutting work is progressing, and the material around the cutting edge is uniform, the external force (resistance force) applied to the cutting edge is ), the forces acting on both the left and right sides of the cutting edge are the same, so the cutting direction of the diamond saw will proceed in the planned direction without any deviation. However, stone and concrete materials may contain hard pebbles, and when these pebbles are in front of the diamond saw, the deviation problem does not occur, but when the pebbles are located away from the front of the diamond saw, Because of this pebble, a diagonal force acts on the cutting edge, so when the cross-section of the diamond saw has a convex R shape, a horizontal component of the force acting in the diagonal direction acts on the cutting edge. The blade edge is pushed sideways,
This causes distortion in the board. In this state, if the diamond saw is fed further, the force acting diagonally on the outer convex R portion will further increase, pushing the board further in the direction of the strain that occurred earlier, and causing a deviation in the cutting direction. If this occurs, and further feed is applied, the motor will become overloaded and will stop. When the cutting operation reaches this state, the amount of deviation in the cutting direction is so large that the material becomes unusable. However, in the diamond saw of the present invention, the outer shape of the tip is the same as the conventional tip, but a portion that does not contain diamond abrasive grains is provided in the middle of the tip, and the planar shape of the tip is, for example, the same as that of the conventional tip. As you can see in Figure 8, because the center of the chip is made to contain less diamond abrasive grains than the sides, the cross section of the chip's outer circumference is worn into a concave shape, and the original concave shape is For reasons explained later, the diamond saw of the present invention does not exhibit any deviation in the cutting direction during cutting until the end of its life. Explain the reason why deviation in the cutting direction does not occur when the tip is concave.O As explained earlier, deviation in the cutting direction is caused by a diamond saw when the tip has a convex round cross section. When an external force acts on the convex R surface from a diagonal direction with respect to the direction of travel,
It has been explained that a horizontal component of this external force is generated, and the substrate is pushed due to this horizontal component, causing distortion, and this distortion causes deviation in the cutting direction. However, in the diamond saw of the present invention, The cross-sectional shape of the tip's outer periphery is concave, and because there is no part that causes horizontal force to be generated, unlike when this part has a convex radius, the diamond saw of the present invention has a concave shape, which reduces the deviation in the cutting direction. This phenomenon does not occur, and furthermore, since the cross section of the outer periphery is maintained in a concave shape until the end of the life of the tip, the diamond saw of the present invention is characterized in that the phenomenon of deviation in the cutting direction does not occur until the end of its life.

Next, another method of making the cross-sectional shape of the diamond saw's outer periphery concave during use will be described. As shown in FIG.
This method is to make them at right angles as shown in Figure 6. In this case as well, the content of diamond abrasive grains is lower in the center of the chip than on both sides, and as a result, the center of the chip wears out first, resulting in a concave outer cross-sectional shape. Also, no deviation in the cutting direction occurs. However, when using the tip shown in Figure 5, the concave tip of the cutting edge is made thin, so
When actually used, the tip wears out quickly, and the depth of the concave shape gradually becomes shallower. As shown in Figure 2, the flat outer circumference of the tip approaches a convex R shape, and there is a deviation in the cutting direction. Since there are defects that are likely to occur, better results can be obtained by adopting a method in which a portion not containing diamond abrasive grains is provided in the center of the chip, as in the method of the present invention.

The tip used in the diamond saw of the present invention described above is provided with a portion in the middle that does not contain diamond abrasive grains, which forms a columnar space.
Their planar shapes are as shown in Figures 8.9, 10, 11, and 12.13, and as represented by the diamond shape in Figure 8, the central part of the chip is better than both outer parts. The structure has a low content of diamond abrasive grains, and even if the columnar spaces are hollow or made of other materials, the deviation in the cutting direction of the diamond saw of the present invention is It does not change the fact that it has characteristics that do not occur. However, this columnar space can be made of a material made of a mixture of graphite powder coated with lead, lead alloy, copper, copper alloy, aluminum, aluminum alloy, nickel or copper, and copper or copper alloy powder, or a synthetic resin material. When the tip is made of a softer material than diamond abrasive grains, the inner surface of the thin-walled portion on both sides of the columnar space provided between the chips does not come into direct contact with the other material such as stone. Premature wear can be prevented and the life of the chip can be extended. It is especially effective when cutting materials such as Oya stone, which have a strong property of abrading the cutting edge. Furthermore, since the impact acting on the chip when the chip cuts into the mating material is absorbed and the amount of impact energy transmitted to the substrate is reduced, there is an advantage in reducing noise during operation. Providing a columnar space that does not contain diamond abrasive grains in the middle of the chip in this way has various advantages as described above, and the planar shape thereof is shown in Figures 8 and 9. 9. As shown in Fig. 10, Fig. 11, Fig. 12, Fig. 13, and Fig. This is because the degree of abrasion of the material differs markedly, and the selection of the material constituting the planar shape of the columnar space and the part T) shall be determined by trial use of the material in advance, depending on the situation of the mating material.

As has become clear from the above explanation, the diamond saw of the present invention, in which a chip having a portion not containing diamond abrasive grains in the middle of the chip is disposed and fixed to the outer periphery of a substrate, has a cross-sectional shape of the outer periphery. Since the diamond saw can maintain its concave shape until the end of its life, the cutting direction will not deviate. Therefore, it can be said to be highly economical because it has various advantages such as shortening processing time, eliminating waste due to deviation in the cutting direction, extending life, and reducing noise.

[Brief explanation of the drawing]

Fig. 1 A partial front view of a diamond saw Fig. 2 A plan view of a conventional tip Fig. 3 A cross-sectional view of the tip shown in Fig. 2 Fig. 4 A cross-sectional view of the outer periphery of a conventional tip after use for a certain period of time Fig. 5 Figure 6 Plan view of a tip with a concave tip Figure 5
Fig. 7 is a cross-sectional view of the tip outer circumference when the tip shown in Fig. 5 is new. Fig. 8 is a cross-sectional view of the tip outer circumference after the tip shown in Fig. 5 has been used for a certain period of time. Figs. 8.9, 10, 11, 12. 13. Top view of the tip 1, Substrate 2 Chip 3 Tip 4 of the conventional tip, Cross section of the outer periphery after using the conventional tip 5, Plan view of the tip of the concave tip 6 Outer periphery of the concave tip when it is new Cross section 7, chip outer periphery cross section 8 after use of the concave tip, plan view 9 of rhombic space, plan view 10 of circular space, plan view 11 of square space, plan view 12 of hexagonal space, plan view of oval space Figure 13, Plan view of rectangular space jr'L@ *3vA'f4ffl fs
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Claims (3)

[Claims] (1) Construct a diamond saw consisting of multiple diamond chips arranged and fixed at regular intervals on the outer periphery of the substrate.
A diamond saw for cutting stones, etc., characterized in that the tip has a central part that does not contain diamond abrasive grains. (2) A diamond saw for cutting stone, etc., according to claim 1, wherein the part provided at the center of the tip and which does not contain diamond abrasive grains forms a columnar space. (3) The part provided in the center of the tip that does not contain diamond abrasive grains is made of graphide powder coated with lead, lead alloy, copper, copper alloy, aluminum, aluminum alloy, nickel, or copper. The diamond for cutting stones, etc. according to claim 1, which is made of a material that is softer than diamond abrasive grains, such as a material mixed with alloy powder or a synthetic resin material. saw