Brazed diamond saw blade with large sand width

Abstract

The utility model discloses a large sand width brazing diamond saw blade which comprises an upper gasket, a lower gasket and a semi-finished saw blade clamped between the upper gasket and the lower gasket, the semi-finished saw blade is composed of a saw blade base body and diamond particles, and the diamond particles are evenly distributed on the circumferential face of the outer side of the saw blade base body. The upper gasket, the lower gasket and the semi-finished saw blade are all provided with inner holes, and the inner holes of the three are concentric circles with the same radius; according to the brazed diamond saw blade with the large sand width, the flatness precision of the saw blade with the large sand width is guaranteed, cutting is stable, using is safer through particle size screening and control over the equal height through a special clamp during preparation, and the cutting service life of the saw blade is effectively guaranteed. And the used particle size screening process is simple in requirement and easy to realize. The saw blade clamp is easy to machine, suitable for batch preparation, stable, efficient and beneficial to control of the preparation cost of saw blade products, and has good economic benefits.

Description

Technical Field

[0001] The utility model belongs to the field of diamond tool preparation, and more specifically, the utility model relates to... Background Art

[0002] Brazed diamond saw blades have been used in domestic stone cutting for twenty years. Especially in the cutting and processing of marble, they are widely used due to the advantages of sharp cutting without clogging and long cutting life. In recent years, with the popularity of artificial stone and rock slabs, the application of small-sized brazed diamond saw blades has increased significantly. And due to the requirement of cutting depth, the cloth width (generally called sand width) of the saw blade is getting wider and wider, and the maximum width can even reach 60% of the saw blade radius, which significantly exceeds the sand width of conventional brazed diamond saw blades.

[0003] With the increase of the sand width, the difficulty of vacuum brazing preparation increases significantly. Since the thickness of the saw blade matrix is generally thin, graphite or ceramic gaskets are needed to press the matrix part to keep the matrix flat at high temperature in the vacuum brazing furnace. However, conventional fixture gaskets only press the matrix part, and the part with diamonds (i.e., the sand width) is in a free placement state. When the sand width is small (such as 5% - 20% of the saw blade radius), this part basically does not affect the stress distribution and flatness of the saw blade finishing.

[0004] However, when the sand width is more than 30% of the saw blade radius, the cloth area accounts for a relatively large proportion, and the area restricted by the fixture gasket is relatively small. The freely extending part is often affected by the brazing alloy and the heating process curve, resulting in large internal stress and edge stress deformation. In severe cases, the saw blade is deformed and cannot be used for cutting.

[0005] And in the brazed diamond process, the distribution of diamonds and solder alloy on the saw blade surface is mostly random, and the surface particle height equality is poor. Using a profiling fixture gasket is extremely easy to cause the gasket to be cracked due to point contact. Even if no fracture occurs, it cannot be truly pressed on the diamond surface due to its unevenness. Summary of the Utility Model

[0006] To solve the above technical problems, the utility model provides a brazed diamond saw blade with a large sand width.

[0007] In order to achieve the above object, the technical solution adopted by the utility model is as follows:

[0008] A brazed diamond saw blade with a large sand width includes an upper gasket, a lower gasket, and a semi-finished saw blade sandwiched between the upper gasket and the lower gasket. The semi-finished saw blade consists of a saw blade matrix and diamond particles, and the diamond particles are evenly distributed on the outer circumferential surface of the saw blade matrix; the upper gasket, the lower gasket, and the semi-finished saw blade are all provided with inner holes, and the inner holes of the three are concentric circles with the same radius.

[0009] The utility model discloses a brazed diamond saw blade with large abrasive width, and the particle size range of the diamond particles is: 40 mesh to 100 mesh.

[0010] The utility model discloses a brazed diamond saw blade with large abrasive width. The diamond particles are screened in a narrow range by a standard sieve, and the maximum particle size of the diamond does not exceed 6% of the average particle size value of the diamond.

[0011] The utility model discloses a brazed diamond saw blade with large abrasive width. Both the upper gasket and the lower gasket are made of alumina ceramics or ceramic fiber boards with a purity of more than 95%.

[0012] The utility model discloses a brazed diamond saw blade with large abrasive width. The ratio range of the outer diameter of the upper gasket and the lower gasket to the outer diameter of the finished saw blade is: 0.85 to 0.95.

[0013] The utility model discloses a brazed diamond saw blade with large abrasive width. The thickness range of the upper gasket and the lower gasket is 2.5 mm to 15 mm.

[0014] Adopting the scheme of the utility model, compared with the prior art, the following beneficial effects are obtained:

[0015] For the brazed diamond saw blade with large abrasive width, during preparation, the equal height is controlled through particle size screening and a special fixture, so that the flatness accuracy of the large abrasive width saw blade is ensured, the cutting is stable, the use is safer, and the cutting life of the saw blade is effectively guaranteed. The required particle size screening process is simple and easy to implement. The saw blade fixture is easy to process and suitable for batch preparation, which is stable and efficient, is beneficial to controlling the preparation cost of the saw blade product, and has good economic benefits.

[0016] Hereinafter, the present utility model will be described in more detail with reference to the drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The following briefly describes the content expressed by each drawing in this specification and the marks in the drawings:

[0018] Figure 1 It is a schematic diagram of the present utility model;

[0019] The marks in the figure are: 1, upper gasket; 2, semi-finished saw blade; 3, diamond particles; 4, saw blade matrix; 5, lower gasket; 6, saw blade inner hole; 7, gasket inner hole. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] The following will, with reference to the accompanying drawings, further elaborate in detail on the specific implementation of the present utility model, including the shapes, structures of various components involved, the mutual positions and connection relationships between various parts, the functions and working principles of various parts, the manufacturing process, the operation and usage methods, etc., to help those skilled in the art have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of the present utility model.

[0021] As Figure 1 shown, a large-width brazed diamond saw blade includes an upper gasket 1, a lower gasket 5, and a semi-finished saw blade 2 sandwiched between the upper gasket 1 and the lower gasket 5. The semi-finished saw blade 2 consists of a saw blade substrate 4 and diamond particles 3, and the diamond particles 3 are evenly distributed on the outer circumferential surface of the saw blade substrate 4; the upper gasket 1, the lower gasket 5, and the semi-finished saw blade 2 are all provided with inner holes, and the inner holes of the three are concentric circles with the same radius.

[0022] The particle size range of the diamond particles 3 is: 40 mesh to 100 mesh.

[0023] The diamond particles 3 are screened in a narrow interval using a standard sieve, and the maximum particle size of the diamond does not exceed 6% of the average particle size value of the diamond.

[0024] Both the upper gasket 1 and the lower gasket 5 are made of alumina ceramics or ceramic fiber boards with a purity of more than 95%.

[0025] The ratio range of the outer diameters of the upper gasket 1 and the lower gasket 5 to the outer diameter of the finished saw blade is: 0.85 to 0.95.

[0026] The thickness range of the upper gasket 1 and the lower gasket 5 is 2.5 mm to 15 mm.

[0027] Working principle

[0028] Two key points of this technical solution are the screening optimization of diamonds and the structural design of the saw blade fixture gaskets.

[0029] The screening optimization of diamonds is to ensure that the diamonds on the side of the saw blade can reach the same height, so that the gasket can be pressed on its surface, and it will not cause the gasket to rupture due to being pricked by individual diamond particles with too large a particle size. In addition, only when the gasket can contact a large proportion of diamonds can it play a pressing effect on the flatness of the saw blade.

[0030] It can also be seen from the above that the screening of diamonds is very important. Generally, for a single particle size range of diamonds, according to national standards, the particle size distribution range is relatively wide, and the difference between the maximum particle size and the minimum particle size can be as high as 20%, which is not conducive to the implementation of the present invention. Therefore, on the basis of the existing particle size range, it is further screened to make the maximum particle size value not greater than 6% of the average particle size value.

[0031] Secondly, there is the gasket material. Since diamond brazing is prepared by fixing with a solder alloy, and the solder alloy cannot react with the saw blade gasket. Otherwise, the solder particles between the saw blades may adhere to the gasket surface, resulting in the inability to remove the gasket. Therefore, the graphite gaskets used in conventional diamond tools cannot be used in this field. Only ceramic materials or similar materials that do not undergo chemical metallurgy with the solder alloy can be used.

[0032] Furthermore, the structural design of the gasket determines the pressing plane accuracy and stability. There is a step between the outside and the inner hole of the gasket, and the height difference is the average diamond particle size value. In this way, the gasket can be pressed on the surface of the diamond to control its deformation.

[0033] Finally, the outer diameter of the gasket should not be greater than or equal to the outer diameter of the saw blade. This is because the diamond and the solder on the saw blade surface are fixed on the substrate surface, and a certain amount of binder coating is required to achieve this. And the binder needs to volatilize to avoid affecting the brazing performance. Therefore, the outer diameter of the gasket needs to be relatively small to facilitate the volatilization of the binder. In addition, the liberalization treatment of the saw blade edge is also beneficial to the stress release of the saw blade during the vacuum brazing process.

[0034] The above has made an exemplary description of the present invention in conjunction with the accompanying drawings. Obviously, the specific implementation of the present invention is not limited by the above methods. As long as various non-substantive improvements are made by adopting the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the protection scope of the present invention.

Claims

1. A large sand width brazed diamond saw blade, characterized in that: It comprises an upper gasket, a lower gasket and a semi-finished saw blade sandwiched between the upper gasket and the lower gasket, wherein the semi-finished saw blade consists of a saw blade base and diamond particles, and the diamond particles are evenly distributed on the outer circumferential surface of the saw blade base; the upper gasket, the lower gasket and the semi-finished saw blade are all provided with inner holes, and the inner holes of the three are concentric circles with the same radius.

2. The large grit width brazed diamond saw blade according to claim 1, characterized in that: The particle size range of the diamond particles is 40 mesh to 100 mesh.

3. The large grit width brazed diamond saw blade according to claim 1, characterized in that: The diamond particles are screened in a narrow range using a standard sieve, and the maximum particle size of the diamond does not exceed 6% of the average particle size of the diamond.

4. The large grit width brazed diamond saw blade according to claim 1, characterized in that: The upper gasket and the lower gasket are both made of alumina ceramic or ceramic fiberboard with a purity of more than 95%.

5. The large grit width brazed diamond saw blade according to claim 1, characterized in that: The ratio of the outer diameter of the upper gasket and the lower gasket to the outer diameter of the finished saw blade is in the range of 0.85 to 0.

95.

6. The large grit width brazed diamond saw blade according to claim 1, characterized in that: The thickness of the upper gasket and the lower gasket ranges from 2.5 mm to 15 mm.

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