Method for manufacturing an ordered arrangement of multi-layer abrasive beads and a rope saw thereof

Abstract

The application provides a manufacturing method of an orderly arranged multilayer abrasive bead and a rope saw, which comprises the following steps: S1, arranging body powder without abrasive particles, preparing A coated abrasive particles and B coated abrasive particles; S2, first laying a single-layer particle layer of the A coated abrasive particles; S3, then filling the B coated abrasive particles in the gap between two adjacent A coated abrasive particles; S4, then laying the body powder without abrasive particles on the B coated abrasive particles and the A coated abrasive particles to obtain a multilayer abrasive layer; S5, repeating steps S2-S4 to obtain a multilayer abrasive layer with a thickness; and S6, compacting and compacting the multilayer abrasive layer with the thickness containing the A coated abrasive particles, the B coated abrasive particles and the body powder, and cold-pressing and forming to obtain a multilayer abrasive bead blank. The multilayer abrasive bead is manufactured, the distribution of the abrasive particles is orderly, the density is controllable, the multilayer abrasive layer formed by the particle layer and the body powder layer alternately is cold-pressed and hot-pressed and sintered and formed, the multilayer abrasive bead has a stable structure, a relatively high service life and a stable use efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of wire saw, in particular to a manufacturing method of an orderly arranged multi-layer abrasive bead and a wire saw. BACKGROUND

[0002] The existing wire saw bead orderly arrangement method is mainly brazing or electroplating, and a single-layer abrasive bead is produced on the surface of the bead. The wire saw product produced by using such beads has high efficiency but short service life. The bead with multi-layer abrasives is usually produced by sintering, and the abrasives are in a disordered arrangement state, and the service life is longer, but the efficiency is in a fluctuating state due to the difference in abrasive distribution.

[0003] Patent No. CN 114434649 A, a multi-layer diamond bead and its manufacturing method, comprises a main base, at least one secondary base is arranged on the surface of the main base, and a working layer is arranged on the surface of the main base and the secondary base. A plurality of diamonds are arranged in the working layer. Although the service life of the multi-layer diamond bead of this structure can be doubled to achieve high efficiency and long life, it solves the defect of low service life of traditional single-layer brazed diamond bead; but after the outer layer of diamond is worn, the inner layer of diamond needs to be removed (cutting stone or artificially removing) before it starts to work, which affects the continuity of its work and further affects the work efficiency.

[0004] Patent No. CN 111644616 A, a preparation method of a spatially uniformly distributed diamond bead, comprises the following steps: S1: uniformly placing diamond particles on the surface of the base film, then pressing the diamond particles into the base film to form a single-layer diamond film; S2: alternately laying and forming the single-layer diamond film and the metal matrix prepared by the alloy powder in the longitudinal direction to obtain a bead green body; S3: debinding and sintering the bead green body to obtain a spatially uniformly distributed diamond bead. Although this technical solution makes the spatial distribution of diamonds in the bead controllable and uniform, the single-layer diamond film and the metal matrix are alternately laid and formed in the longitudinal direction, and in actual work, the single-layer diamond film and the metal matrix are easily separated due to the back-and-forth cutting of the bead, so the structure of the bead prepared by this process is unstable, which further affects the service life of the bead. SUMMARY

[0005] Therefore, it is necessary to provide a manufacturing method of an orderly arranged multi-layer abrasive bead to solve the problems of poor continuity and unstable structure of the bead produced by the existing process.

[0006] To achieve the above-mentioned purpose, the present application provides a manufacturing method of an orderly arranged multi-layer abrasive bead, which comprises the following steps:

[0007] S1, configuring the matrix powder without abrasive grains, preparing the A-coated abrasive grains and B-coated abrasive grains;

[0008] S2, first laying the single-layer particle layer of the A-coated abrasive grains;

[0009] S3, then filling the B-coated abrasive grains in the gap between the two adjacent A-coated abrasive grains;

[0010] S4, then laying the matrix powder without abrasive grains on the B-coated abrasive grains and A-coated abrasive grains to obtain the multi-layer abrasive layer;

[0011] S5, repeating the steps S2-S4 to obtain the multi-layer abrasive layer with the thickness;

[0012] S6, compacting and compacting the multi-layer abrasive layer with the thickness containing the A-coated abrasive grains, B-coated abrasive grains and matrix powder, cold-pressing the multi-layer abrasive layer to obtain the multi-layer abrasive bead blank;

[0013] S7, hot-pressing and sintering the multi-layer abrasive bead blank to obtain the ordered multi-layer abrasive bead.

[0014] Further, the diameter of the A-coated abrasive grains is greater than the diameter of the B-coated abrasive grains.

[0015] Further, the diameter of the A-coated abrasive grains is 1.2-1.8 times the diameter of the B-coated abrasive grains.

[0016] Further, the diameter of the A-coated abrasive grains ranges from 0.6-0.9 mm, and the diameter of the B-coated abrasive grains ranges from 0.4-0.6 mm.

[0017] Further, the A-coated abrasive grains and B-coated abrasive grains are both diamond abrasive grains.

[0018] Further, the matrix powder without abrasive grains is mixed by one or more of Fe powder, CuSn alloy powder, Ni powder and WC powder.

[0019] Further, the steps S2-S6 are completed in a cold-pressing mold, which includes a cold-pressing mold cavity rotating along a central axis, and an upper press head and a lower press head moving in the cold-pressing mold cavity. The initial position of the cold-pressing mold is that the upper press head is above the cold-pressing mold cavity, and the lower press head is in the cold-pressing mold cavity, and the end face of the lower press head is flush with the end face of the cold-pressing mold cavity. It includes the following steps:

[0020] S2, the matrix powder without abrasive grains, the A-coated abrasive grains and the B-coated abrasive grains are respectively placed in three material boats; the lower press head is lowered to leave a first blank interval height, the A-coated abrasive grains in the material boat are sent into the cold-pressing mold cavity of the mold, and a single-layer particle layer of the A-coated abrasive grains is laid on the end face of the lower press head;

[0021] S3, the B-coated abrasive particles in the boat are sent into the cold pressing mold cavity of the mold, and the B-coated abrasive particles are filled in the gap between the two adjacent A-coated abrasive particles;

[0022] S4, the lower head continues to sink to leave a second blank interval height, the body powder without abrasive particles in the boat is sent into the cold pressing mold cavity of the mold from the mold lower head, and a multi-layer abrasive layer is obtained;

[0023] S5, steps S2-S4 are repeated to obtain a multi-layer abrasive layer with a thickness;

[0024] S6, the upper head of the mold is pressed downward to the lower head, the multi-layer abrasive layer with a thickness containing A-coated abrasive particles, B-coated abrasive particles and body powder is compacted, the multi-layer abrasive layer is cold pressed and formed, the steel body is inserted in the middle, and a multi-layer abrasive bead blank is obtained.

[0025] Further, the first blank interval height in the step S2 is equal to the height of the diameter of the A-coated abrasive particles, the A-coated abrasive particles in the boat are sent into the cold pressing mold cavity of the mold from the mold lower head, and a single-layer A-coated abrasive particle particle layer is formed in the cold pressing mold cavity.

[0026] Further, the multi-layer abrasive bead blank in the step S7 is loaded into a graphite mold for hot pressing and sintering to obtain an orderly arranged multi-layer abrasive bead.

[0027] A method for manufacturing a rope saw, the method comprising the following steps: a method for manufacturing an orderly arranged multi-layer abrasive bead is used to machine and surface treat the orderly arranged multi-layer abrasive bead, the orderly arranged multi-layer abrasive bead is worn on the surface of a steel wire rope, glue injection or injection molding is performed in a conventional manner for manufacturing a rope saw, and an abrasive wheel is used to open a blade to expose the A-coated abrasive particles and the B-coated abrasive particles, and finally a rope saw is obtained.

[0028] Different from the prior art, the above technical solution adopts a single-layer A-coated abrasive particle particle layer, and B-coated abrasive particles are filled between adjacent A-coated abrasive particles in the single-layer A-coated abrasive particle particle layer; then the body powder without abrasive particles is laid on the B-coated abrasive particles and the A-coated abrasive particles to obtain a multi-layer abrasive layer; the single-layer A-coated abrasive particle particle layer, the single-layer B-coated abrasive particle particle layer and the single-layer body powder layer constitute the multi-layer abrasive layer, and the above steps are repeated to obtain a multi-layer abrasive layer with a thickness; then cold pressing is performed to obtain a multi-layer abrasive bead blank; and then hot pressing and sintering are performed to obtain an orderly arranged multi-layer abrasive bead. The multi-layer abrasive bead manufactured by the technical solution has an orderly abrasive distribution and a controllable density, and the multi-layer abrasive layer composed of the particle layer and the body powder layer is cold pressed and hot pressed and formed together, so that the multi-layer abrasive bead has a stable structure, a high service life and a stable use efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0029] Figure 1 The flowchart of the method for manufacturing an orderly arranged multi-layer abrasive bead.

[0030] Figure 2 An operation schematic diagram of the manufacturing method of the ordered arrangement multi-layer abrasive beads according to the embodiment;

[0031] Figure 3 An operation schematic diagram of the manufacturing method of the ordered arrangement multi-layer abrasive beads according to the embodiment;

[0032] Figure 4 An operation schematic diagram of the manufacturing method of the ordered arrangement multi-layer abrasive beads according to the embodiment;

[0033] Figure 5 An operation schematic diagram of the manufacturing method of the ordered arrangement multi-layer abrasive beads according to the embodiment;

[0034] Figure 6 An operation schematic diagram of the manufacturing method of the ordered arrangement multi-layer abrasive beads according to the embodiment;

[0035] Figure 7 An operation schematic diagram of the manufacturing method of the ordered arrangement multi-layer abrasive beads according to the embodiment;

[0036] Figure 8 An operation schematic diagram of the manufacturing method of the ordered arrangement multi-layer abrasive beads according to the embodiment;

[0037] Figure 9 An operation schematic diagram of the manufacturing method of the ordered arrangement multi-layer abrasive beads according to the embodiment;

[0038] Figure 10 An operation schematic diagram of the manufacturing method of the ordered arrangement multi-layer abrasive beads according to the embodiment;

[0039] Figure 11 A structure schematic diagram of the ordered arrangement multi-layer abrasive beads according to the embodiment;

[0040] Figure 12 An operation schematic diagram of the manufacturing method of the ordered arrangement multi-layer abrasive beads according to the embodiment; Figure 11 A sectional view along A-A;

[0041] Figure 13 A structure schematic diagram of the rope saw according to the embodiment.

[0042] Explanation of reference signs:

[0043] 10, cold-pressing die cavity

[0044] 101, central axis

[0045] 20, core rod

[0046] 30, lower press head

[0047] 40, upper press head;

[0048] 50, A coated abrasive particle;

[0049] 60, B coated abrasive particle;

[0050] 70, carcass flour;

[0051] 801, first blanking interval height;

[0052] 802, second blanking interval height;

[0053] 90, steel body;

[0054] 100, string bead;

[0055] 200, steel wire rope. DETAILED DESCRIPTION

[0056] To clearly illustrate the technical content, structural features, purposes and effects of the technical solutions, the following will be described in detail in combination with specific embodiments and the accompanying drawings.

[0057] In this document, the term "embodiment" means that the specific features, structures or characteristics described in connection with the embodiment can be included in at least one embodiment of the present application. The term "embodiment" appearing in various places in the specification does not necessarily refer to the same embodiment, and does not particularly limit the independence or association between other embodiments. In principle, in this application, as long as there is no technical contradiction or conflict, the technical features mentioned in each embodiment can be combined in any way to form a corresponding implementable technical solution.

[0058] Unless otherwise defined, the meanings of the technical terms used in this document are the same as those commonly understood by those skilled in the art to which the present application belongs; the use of related terms in this document is only for the purpose of describing specific embodiments, and is not intended to limit the present application.

[0059] In the description of the present application, the phrase "and / or" is used to describe the logical relationship between the objects, which means that there can be three relationships, for example, A and / or B, which means that there are three cases: A exists, B exists, and A and B exist at the same time. In addition, the character " / " in this document generally represents the logical relationship of "or" between the associated objects before and after.

[0060] In this application, such as "first" and "second", the terms are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual quantity, primary and secondary or order relationship between the entities or operations.

[0061] In the present application, the terms "comprise", "contain", "have", or other similar phrases as used in a clause do not exclude, in the absence of more limitations, the presence of further elements than those cited in the clause, and they do not, in the present application, exclude the presence of additional elements in the process, method, or product that includes the cited elements, so that the process, method, or product that includes a series of elements can include not only those defined elements, but also other elements not explicitly listed, or also elements inherent to such a process, method, or product.

[0062] As understood in the same way as in the "Examination Guidelines", in the present application, the expressions "greater than", "less than", "exceed" and the like are understood as not including the number itself; the expressions "above", "below", "within" and the like are understood as including the number itself. In addition, in the description of the embodiments of the present application, the meaning of "multiple" is more than two (including two), and similar expressions related to "multiple" are also understood in this way, for example, "multiple groups", "multiple times" and the like, unless otherwise explicitly specified.

[0063] In the description of the embodiments of the present application, the spatial-related expressions used, such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "perpendicular", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", and the like, indicate the orientation or positional relationship based on the orientation or positional relationship shown in the specific embodiments or the drawings, and are only for the convenience of describing the specific embodiments of the present application or for the reader to understand, and do not indicate or imply that the indicated device or component must have a particular position, a particular orientation, or be constructed or operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0064] Unless otherwise explicitly specified or limited, in the description of the embodiments of the present application, the terms "mount", "connect", "connect", "fix", "set", and the like should be understood broadly. For example, the "connection" can be a fixed connection, or a detachable connection, or an integral setting; it can be a mechanical connection, or an electrical connection, or a communication connection; it can be directly connected, or indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art to which the present application belongs, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0065] Reference is made to Figures 1-12As shown, the embodiment provides a manufacturing method of orderly arranged multi-layer abrasive beads. A particle layer of A coated abrasive particles 50 is laid flat, and B coated abrasive particles 60 are filled between adjacent A coated abrasive particles 50 in the particle layer of single-layer A coated abrasive particles 50. Tire body powder 70 without abrasive particles is laid flat on the B coated abrasive particles 60 and the A coated abrasive particles 50 to obtain a multi-layer abrasive layer. The particle layer of single-layer A coated abrasive particles 50, the particle layer of single-layer B coated abrasive particles 60, and the single-layer tire body powder layer constitute the multi-layer abrasive layer. The above steps are repeated to obtain a multi-layer abrasive layer with a thickness. Cold pressing is performed to obtain a multi-layer abrasive bead blank. Hot pressing and sintering are performed to obtain orderly arranged multi-layer abrasive beads. The multi-layer abrasive beads manufactured by the technical scheme have orderly distributed abrasive particles, controllable density, and stable multi-layer abrasive layer structure formed by alternating particle layers and tire body powder layers. The multi-layer abrasive beads have high service life and stable use efficiency.

[0066] The specific implementation of the embodiment includes the following steps:

[0067] S1, configure tire body powder 70 without abrasive particles, prepare A coated abrasive particles 50 and B coated abrasive particles 60;

[0068] S2, first lay a particle layer of single-layer A coated abrasive particles 50;

[0069] S3, then fill B coated abrasive particles 60 in the gap between two adjacent A coated abrasive particles 50;

[0070] S4, then lay tire body powder 70 without abrasive particles on the B coated abrasive particles 60 and the A coated abrasive particles 50 to obtain a multi-layer abrasive layer (the number of layers of the abrasive layer is related to the diameter of the laid particle layer of A coated abrasive particles 50, that is, how many A coated abrasive particles 50 can be accommodated by the diameter of the particle layer);

[0071] S5, repeat steps S2-S4 to obtain a multi-layer abrasive layer with a thickness (increase the thickness of the multi-layer abrasive layer);

[0072] S6, compact the multi-layer abrasive layer with a thickness containing A coated abrasive particles 50, B coated abrasive particles 60, and tire body powder 70, and cold press the multi-layer abrasive layer to obtain a multi-layer abrasive bead blank;

[0073] S7, hot press and sinter the multi-layer abrasive bead blank to obtain orderly arranged multi-layer abrasive beads 100.

[0074] In the embodiment, the A coated abrasive particles 50 and the B coated abrasive particles 60 are both diamond abrasive particles for cutting hard and brittle stone, the diameter of the A coated abrasive particles 50 is greater than the diameter of the B coated abrasive particles 60, the diameter of the A coated abrasive particles 50 ranges from 0.6 mm to 0.9 mm, the diameter of the B coated abrasive particles 60 ranges from 0.4 mm to 0.6 mm, preferably the diameter of the A coated abrasive particles 50 is 1.2 to 1.8 times, preferably 1.5 times the diameter of the B coated abrasive particles 60, so that there is exactly one B coated abrasive particle 60 between two A coated abrasive particles 50, for example, the diameter of the A coated abrasive particles 50 is 0.75 mm and the diameter of the B coated abrasive particles 60 is 0.5 mm. The matrix powder 70 without abrasive particles is mixed by one or more of Fe powder, CuSn alloy powder, Ni powder and WC powder.

[0075] In a specific embodiment, the steps S2-S6 are completed in a cold pressing mold, the cold pressing mold includes a cold pressing mold cavity (the cold pressing mold cavity is a cylinder with openings on both top and bottom) rotating along the central axis 101 (here the central axis 101 is the central axis of the cold pressing mold cavity), a core rod 20 is arranged in the middle of the cylinder (the central axis of the core rod 20 coincides with the central axis 101 of the cold pressing mold cavity, and the end face of the core rod 20 is flush with the end face of the cold pressing mold cavity), and the core rod 20 and the cold pressing mold cavity form an annular cavity; the cold pressing mold cavity has a lower pressing head 30 (the lower pressing head 30 is annular in structure and is matched with the annular cavity, and moves along the height direction of the core rod 20 and the cold pressing mold cavity) and an upper pressing head 40 (the upper pressing head 40 is annular in structure and is matched with the annular cavity, and moves along the height direction of the core rod 20 and the cold pressing mold cavity); when the cold pressing mold is in the initial position, the upper pressing head 40 is located directly above the cold pressing mold cavity, and the lower pressing head 30 is located in the cold pressing mold cavity, and the end face of the lower pressing head 30 is flush with the end face of the cold pressing mold cavity (see Figure 2 The method comprises the following steps:

[0076] S2, the matrix powder 70 without abrasive particles, the A coated abrasive particles 50 and the B coated abrasive particles 60 are placed in three boats respectively; the lower pressing head 30 is lowered to leave a first blank interval height 801, the A coated abrasive particles 50 in the boat are sent into the cold pressing mold cavity 10 of the mold, the A coated abrasive particles 50 are laid on the end face of the lower pressing head 30, and a single layer of the A coated abrasive particles 50 is formed in the cold pressing mold cavity 10 (a layer of the A coated abrasive particles 50 is laid on the end face of the lower pressing head 30); preferably, the first blank interval height 801 is the height of the diameter of the A coated abrasive particles 50, so that the A coated abrasive particles 50 will not slide out of the cold pressing mold cavity 10 of the mold, and a single layer of the A coated abrasive particles 50 can be laid (see Figures 3-4 ).

[0077] S3, the B-coated abrasive particles 60 in the boat are sent into the cold-pressing cavity 10 of the mold, and the B-coated abrasive particles 60 are filled in the gap between two adjacent A-coated abrasive particles 50 (see Figure 5

[0078] S4, the second blanking interval height 802 (the loose height of the tire body powder 70 without abrasive particles, which is the tire body height after compaction, and the blanking interval height in this embodiment is 7 mm) is left by the continuous sinking of the lower head 30, the tire body powder 70 without abrasive particles in the boat is sent into the cold-pressing cavity 10 of the mold, and a multi-layer abrasive layer is obtained (the number of layers of the abrasive layer is related to the interval of the annular cavity between the cold-pressing cavity 10 and the core rod 20, that is, under the condition of the same diameter A-coated abrasive particles 50, the more A-coated abrasive particles 50 can be accommodated, the more layers of the abrasive layer, see Figures 6-7

[0079] S5, steps S2-S4 are repeated to obtain a multi-layer abrasive layer with a thickness (the thickness of the multi-layer abrasive layer is increased, and steps S2-S4 are usually repeated 5 times, see Figure 8

[0080] S6, the upper head 40 of the mold is pressed downward to the direction of the lower head 30, the multi-layer abrasive layer with a thickness containing A-coated abrasive particles 50, B-coated abrasive particles 60 and tire body powder is compacted and solidified, the multi-layer abrasive layer is cold-pressed and formed, the steel body 90 is inserted in the middle, and a multi-layer abrasive bead blank is obtained (see Figures 9-10

[0081] In a specific embodiment, the step S7 is completed in a graphite mold, and the multi-layer abrasive bead blank is loaded into the graphite mold for hot-pressing sintering to obtain an ordered multi-layer abrasive bead (see Figures 11-12

[0082] A rope saw is obtained by machining and surface treating the ordered multi-layer abrasive bead obtained by the manufacturing method of the ordered multi-layer abrasive bead, wearing the ordered multi-layer abrasive bead on the surface of the steel wire rope 200, injecting glue or injection molding in the conventional way of rope saw manufacturing, and opening the blade by the grinding wheel to expose the A-coated abrasive particles 50 and the B-coated abrasive particles 60 (see Figure 13

[0083] It should be noted that although the above embodiments have been described in this paper, the patent protection scope of the present application is not limited thereby. Therefore, based on the innovative idea of the present application, changes and modifications to the embodiments described herein, or equivalent structures or equivalent process transformations made by using the contents of the present application specification and drawings, directly or indirectly apply the above technical solutions to other related technical fields, are all included in the protection scope of the present application patent.​​​​​​

Claims

1. A method of making an ordered arrangement of multiple layers of abrasive beads, the method comprising: It comprises the following steps: ​ S1, configure the matrix powder without abrasive grains, prepare A-coated abrasive grains and B-coated abrasive grains; S2, first lay a single-layer particle layer of A-coated abrasive grains; S3, then fill B-coated abrasive grains in the gap between two adjacent A-coated abrasive grains, so that B-coated abrasive grains are located on the upper and lower sides of A-coated abrasive grains, the A-coated abrasive grains and B-coated abrasive grains form a ring structure, and the outermost side of the ring structure contains A-coated abrasive grains and B-coated abrasive grains at the same time; S4, then lay the matrix powder without abrasive grains on the B-coated abrasive grains and A-coated abrasive grains to obtain a multi-layer abrasive layer; S5, repeat steps S2-S4 to obtain a multi-layer abrasive layer with a thickness; S6, compact and consolidate the multi-layer abrasive layer containing A-coated abrasive grains, B-coated abrasive grains and matrix powder, and cold-press form the multi-layer abrasive layer to obtain a multi-layer abrasive bead blank; S7, obtain an orderly arranged multi-layer abrasive bead by hot-pressing sintering the multi-layer abrasive bead blank.

2. The method of claim 1, wherein: The diameter of the A-coated abrasive grains is greater than the diameter of the B-coated abrasive grains.

3. The method of claim 1, wherein: The diameter of the A-coated abrasive grains is 1.2-1.8 times the diameter of the B-coated abrasive grains.

4. The method of claim 1, wherein: The diameter of the A-coated abrasive grains ranges from 0.6-0.9 mm, and the diameter of the B-coated abrasive grains ranges from 0.4-0.6 mm.

5. The method of claim 1, wherein: The A-coated abrasive grains and B-coated abrasive grains are both diamond abrasive grains.

6. The method of claim 1, wherein: The matrix powder without abrasive grains is mixed by one or more of Fe powder, CuSn alloy powder, Ni powder and WC powder.

7. The method of claim 1-6, wherein the method further comprises: The steps S2-S6 are completed in a cold-pressing mold, which comprises a cold-pressing mold cavity rotating along a central axis, and an upper pressing head and a lower pressing head moving in the cold-pressing mold cavity. The initial position of the cold-pressing mold is that the upper pressing head is above the cold-pressing mold cavity, and the lower pressing head is in the cold-pressing mold cavity, and the end face of the lower pressing head is flush with the end face of the cold-pressing mold cavity. It comprises the following steps: S2, the matrix powder without abrasive grains, the preparation of A-coated abrasive grains and B-coated abrasive grains are respectively placed in three material boats; the lower pressing head is lowered to leave a first blank interval height, the A-coated abrasive grains in the material boat are sent into the cold-pressing mold cavity of the mold, and a single-layer particle layer of A-coated abrasive grains is laid on the end face of the lower pressing head; S3, then the B-coated abrasive grains in the material boat are sent into the cold-pressing mold cavity of the mold, and the B-coated abrasive grains are filled in the gap between two adjacent A-coated abrasive grains; S4, the lower pressing head continues to sink to leave a second blank interval height, and the matrix powder without abrasive grains in the material boat is sent from the lower pressing head of the mold into the cold-pressing mold cavity of the mold to obtain a multi-layer abrasive layer; S5, repeat steps S2-S4 to obtain a multi-layer abrasive layer with a thickness; S6, the upper pressing head of the mold is pressed downward to the lower pressing head, the multi-layer abrasive layer with a thickness containing A-coated abrasive grains, B-coated abrasive grains and matrix powder is compacted and consolidated, the multi-layer abrasive layer is cold-pressed to form a multi-layer abrasive bead blank with a steel body inserted in the middle.

8. The method of claim 7, wherein the method further comprises: The first blank interval height in step S2 is equal to the height of the diameter of the A-coated abrasive grains, and the A-coated abrasive grains in the material boat are sent from the lower pressing head of the mold into the cold-pressing mold cavity of the mold to form a single-layer particle layer of A-coated abrasive grains in the cold-pressing mold cavity.

9. The method of claim 7, wherein the method further comprises: The multilayer abrasive beads blank in the step S7 is loaded into a graphite mold for hot-press sintering to obtain the ordered arrangement of multilayer abrasive beads.

10. A method for making a wire saw, using the method for making a multi-layer abrasive bead with ordered arrangement according to any one of claims 1-9, characterized in that: The ordered arrangement of multilayer abrasive beads is also subjected to machining and surface treatment, worn on the surface of a steel wire rope, injected with glue or injection molded in the conventional way of manufacturing a rope saw, and opened by a grinding wheel to expose the A-coated abrasive particles and the B-coated abrasive particles to obtain the rope saw.

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