PDC (Polycrystalline Diamond Compact) bead for wire saw and bead wire saw

Abstract

The utility model discloses a PDC (Polycrystalline Diamond Compact) string bead for a wire saw and a string bead wire saw, which belong to the technical field of superhard materials, the PDC string bead for the wire saw comprises a string bead body, the string bead body consists of a hard alloy matrix and a polycrystalline diamond layer fixed on the hard alloy matrix, and the PDC string bead for the wire saw is characterized in that the diamond layer is electroplated on the peripheral surface of the hard alloy matrix. The PDC string bead wire saw comprises a base line, a plurality of PDC string beads according to any one of claims 1-8 are strung on the base line, and a space ring is arranged between every two adjacent PDC string beads. The PDC string bead wire saw has the advantages of high wear resistance, long service life and the like, the working efficiency is greatly improved, the frequency of replacing the string beads or the chain is reduced, and the total use cost is reduced; and meanwhile, the size stability is good, the process can be better stabilized for cutting work, and the design difficulty of the cutting process is reduced.

Description

Technical Field

[0001] This utility model relates to the field of superhard materials technology, and in particular to a PDC bead for wire saw and a beaded wire saw. Background Technology

[0002] Diamond wire saws, also known as wire saws or diamond wire saws, are saws designed specifically for cutting brittle and hard materials, utilizing the principle of sawing wood with a wire. They are primarily used in mining, for cutting raw blocks, curved slabs, large stone slabs, thick concrete, irregular reinforced concrete, bridges, and roads. Due to their ease of installation and flexible use, capable of both horizontal and vertical cutting, they are widely used in practice. The main load-bearing component of a wire saw is the wire saw chain, which operates primarily by using beads threaded onto a baseline to achieve the cutting action. Diamond wire saws are widely praised for their sharp cutting ability and high efficiency.

[0003] However, traditional beaded beads are mainly sintered beads, made by sintering granular diamonds with a metal binder. The bonding strength between the diamond and the metal binder is not high, the diamond concentration is not high, and the wear ratio is not high. Furthermore, about 1 / 3 to 1 / 4 of the diamonds are lost during the sawing process. Therefore, the lifespan of the beads differs significantly from their designed lifespan, resulting in low processing efficiency. Additionally, during use, the cylindrical beads of conventional beads develop a cone-shaped structure due to wear, easily causing uneven wear and resulting in poor surface finishes on processed stone. Therefore, conventional sintered beads have inferior sharpness, lifespan, processing quality, and stability, and also consume more power and generate more noise, all of which require improvement. Utility Model Content

[0004] This invention provides a PDC bead for wire saws and a beaded wire saw, which solves the problems of low lifespan and easy wear of existing diamond wire saws.

[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:

[0006] A PDC bead for wire saws includes a bead body, which is composed of a cemented carbide substrate and a polycrystalline diamond layer fixed on the cemented carbide substrate. The outer peripheral surface of the cemented carbide substrate is electroplated with a diamond layer.

[0007] The diamond layer is made of diamond powder, and the particle size of the diamond particles in the diamond powder is 100~500μm.

[0008] The bead body is a cylindrical structure with a central hole, and the outermost circle of the bead body is concentric with the central hole.

[0009] The outermost edge of the bead body is provided with 3 to 12 chip removal grooves along the axial direction, and the chip removal grooves are evenly distributed along the circumferential direction.

[0010] The thickness of the diamond layer is 0.1-0.3mm.

[0011] The surface of the polycrystalline diamond layer is a plane or a non-plane.

[0012] The non-plane surface of the polycrystalline diamond layer is an arc-shaped convex surface.

[0013] The non-plane surface of the polycrystalline diamond layer comprises an arc-shaped bottom surface, and the arc-shaped bottom surface is provided with a convex arc-shaped top surface.

[0014] The utility model discloses a PDC string bead rope saw, including the baseline, the baseline has a plurality of PDC string beads, and is equipped with the spacer between the two PDC string beads of adjacent.

[0015] Compared with the prior art, the utility model has the following technical effects and advantages:

[0016] 1. The utility model discloses a PDC diamond and hard alloy material combination, makes the string bead in possessing high wear resistance, has good mechanical toughness, can avoid the accidental early failure caused by fracture, collapse in the process of cutting hard rock.

[0017] 2. The utility model discloses a PDC as string bead, and its diamond layer is high temperature and high pressure synthesis and hard alloy combination, and the bonding strength is far more than traditional sintered string bead, greatly improves the wear resistance of string bead.

[0018] 3. The utility model discloses a PDC diamond layer as cutting stress surface, and the rear hard alloy stress is small, avoids the taper deformation of traditional string bead.

[0019] 4. The utility model discloses a PDC hard alloy outer edge by electroplating method and guarantees that the alloy does not lead to early failure due to debris friction in the cutting process.

[0020] 5. The utility model discloses a design of forming the chip removal groove by grooving in the PDC outer circle, realizes the quick discharge of cutting chip, avoids secondary friction and reduces the service life of product.

[0021] 6. The utility model discloses a PDC string bead rope saw, which has high wear resistance, long service life and other advantages, greatly improves work efficiency, reduces the frequency of replacing string bead or chain, and reduces overall use cost. DRAWINGS

[0022] Figure 1 The sectional view of the PDC string bead for the embodiment 1 rope saw;

[0023] Figure 2This is a cross-sectional view of the PDC beads used in the wire saw in Example 2;

[0024] Figure 3 This is a cross-sectional view of the PDC beads used in the wire saw in Example 3;

[0025] Figure 4 This is a top view of the PDC beads in this utility model;

[0026] Figure 5 This is a top view of another PDC bead in this utility model;

[0027] Figure 6 This is a schematic diagram of the structure of the PDC beaded wire saw in this utility model.

[0028] In the figure, 1. Polycrystalline diamond layer 1, 2. Hard alloy matrix, 3. Central hole, 4. Diamond layer, 5. Diamond particles, 6. Chip removal groove, 7. Baseline, 8. Spacer. Detailed Implementation

[0029] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. In addition, the forms of the various structures described in the following embodiments are merely illustrative. The air source heat pump defrosting device involved in this utility model is not limited to the structures described in the following embodiments. All other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model. Example 1

[0030] like Figure 1 , Figure 4 As shown, this embodiment provides a PDC bead for wire saws, including a bead body composed of a cemented carbide substrate 2 and a polycrystalline diamond layer 1 fixed on the cemented carbide substrate 2. The outer peripheral surface of the cemented carbide substrate 2 is electroplated with a diamond layer 4. The polycrystalline diamond and cemented carbide are synthesized in a single process under high temperature and high pressure, while the diamond powder and cemented carbide are combined using an electroplating process. During electroplating, the alloy and diamond particles are held together by the alloy's holding force, fixing the diamond particles onto the alloy layer. Electroplating a diamond layer is a method of adhering diamond particles to a surface through an electroplating process. For example, a metal substrate made of steel is immersed in a bath containing a nickel ion solution. By applying an electric current, the nickel ions are reduced, forming a nickel layer on the substrate. Simultaneously, diamond particles are introduced into the solution, embedding them into the nickel layer, thus forming a strong bond between the diamond and the substrate, resulting in a robust and wear-resistant surface. Other commonly used diamond electroplating methods can also be used.

[0031] Among them, the diamond particle 5 has a particle size of 300μm.

[0032] The main body of the bead is a cylindrical structure with a central hole 3, and the outermost circle of the main body of the bead is concentric with the central hole 3.

[0033] The outermost edge of the bead body has 12 axial chip removal grooves 6, which are evenly distributed along the circumference. In this invention, 3-12 chip removal grooves 6 can be provided, such as... Figure 5 As shown, the bead body has 5 chip removal grooves 6 on its exterior.

[0034] The diamond layer 4 has a thickness of 0.2 mm; the surface of the polycrystalline diamond layer 1 is flat. Example 2

[0035] like Figure 2 As shown, this embodiment provides a PDC bead for wire saws. In this embodiment, the diamond particles 5 have a particle size of 100μm and the diamond layer 4 has a thickness of 0.1mm.

[0036] The non-planar surface of the polycrystalline diamond layer 1 is an arc-shaped convex surface. Example 3

[0037] like Figure 3 As shown, this embodiment provides a PDC bead for wire saws. In this embodiment, the diamond particles 5 have a particle size of 500 μm, and the diamond layer 4 has a thickness of 0.3 mm. The non-planar surface of the polycrystalline diamond layer 1 includes an arc-shaped bottom surface, and a raised arc-shaped top surface is provided on the arc-shaped bottom surface. Example 4

[0038] like Figure 6 As shown, this utility model provides a PDC beaded wire saw, including a baseline 7, on which multiple PDC beads are strung, and a spacer 8 is provided between two adjacent PDC beads.

[0039] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A PDC bead for use in a wire saw comprising a bead body, characterised in that: The string bead body is composed of a cemented carbide base and a polycrystalline diamond layer fixed on the cemented carbide base, and an outer peripheral surface of the cemented carbide base is plated with a diamond layer; the diamond layer is made of diamond powder, and the particle size of diamond particles in the diamond powder is 100-500 microns.

2. A PDC bead for use in a wire saw according to claim 1, characterized in that: The string bead body is in a cylindrical structure with a central hole, and a circle where the outermost edge of the string bead body is located is concentric with the central hole.

3. The PDC bead for wire saw according to claim 1, characterized in that: The outermost edge of the string bead body is provided with 3-12 axial chip flutes which are uniformly distributed in the circumferential direction.

4. The PDC bead for wire saw according to claim 1, characterized in that: The thickness of the diamond layer is 0.1-0.3 mm.

5. The PDC bead for wire saw according to claim 1, characterized in that: The surface of the polycrystalline diamond layer is a plane or a non-plane.

6. A PDC bead for use in a wire saw according to claim 5, characterized in that: The non-plane surface of the polycrystalline diamond layer is an arc-shaped convex surface.

7. The PDC bead for wire saws according to claim 5, characterized in that: The non-plane surface of the polycrystalline diamond layer comprises an arc-shaped bottom surface on which a convex arc-shaped top surface is arranged.

8. A PDC bead string wire saw characterized by: A baseline is provided, and a plurality of PDC string beads according to any one of claims 1-7 are arranged on the baseline, and a spacer is arranged between two adjacent PDC string beads.

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