Matrix-free beaded and diamond wire saw

Abstract

The utility model discloses a kind of matrixless bead and diamond wire saws.Belongs to diamond tool element technical field.The matrixless bead described in the utility model, including bead body, the bead body is cylindrical structure, and is sintered after forming by matrix powder containing diamond abrasive grain and metal or alloy powder;The bead body has an inner hole through the axial direction of bead body upper and lower two ends, the diameter of the inner hole is enlarged from one end of the inner hole to the other end direction, and the end surface between the two ends of the inner hole and the bead body is connected with arc-shaped connecting surface, stepped connecting surface or sawtooth connecting surface transition.The matrixless bead described in the utility model can effectively reduce or even avoid the phenomenon that steel wire rope is sheared and broken due to internal bending of steel wire rope during use of wire saw.

Description

Technical Field

[0001] This utility model relates to the technical field of diamond tool components, specifically to a matrix-free beaded diamond wire saw. Background Technology

[0002] Diamond wire saws are flexible cutting tools widely used in the mining, processing, and shaping of stone, and they are playing an increasingly important role in road and bridge construction and the building industry. Diamond wire saws mainly consist of a steel wire rope and diamond beads, with the diamond beads being the core component. The manufacturing process involves threading beads soaked or sprayed with an organic adhesive (such as Chemlock) onto a steel wire rope. The diamond beads are then fixed to the wire rope at specific intervals using fixing materials (such as plastic, rubber, plastic + spring, spring + rubber, etc.) through injection molding or compression molding, thus completing the manufacturing of the diamond wire saw.

[0003] Conventional diamond beads are cylindrical (cylindrical) in shape, consisting of a cylindrical base and a matrix surrounding the base. The base is typically made of steel or copper, while the matrix, serving as the working layer, is formed by cold-pressing a matrix powder containing diamond abrasive grains and metal or alloy powder onto the base. This traditional structure has the following drawbacks due to the necessity of the base: 1) Reduced radial space and thickness of the working layer, decreasing its effective utilization rate; 2) The exposed ends of the base are longer than the matrix, making the softer base prone to deformation and cracking during cutting, leading to bead breakage and accidents; 3) The matrix and base require sintering, which can create defects at the joint, causing the matrix to detach from the base and resulting in production accidents; 4) Increased base pressing during cold pressing, and secondary processing such as countersinking and tapping of the inner hole in the base after cold pressing and sintering to ensure the bonding strength between the base and the steel wire rope, adding to the cold pressing and subsequent processing steps; 5) The presence of the base increases raw material costs; 6) ... Applying chemical organic adhesives to the inner pores of the bead matrix to enhance bonding strength poses a potential health hazard to operators during the production process, hindering the diamond wire saw industry from moving towards green production; 7) As diamond wire saws are flexible cutting tools that drive the cutting object through guide wheels, stress is generated between the rigid matrix end and the wire rope when the wire saw passes the guide wheel or the object during the cutting process, causing the wire rope to wear and break; Furthermore, during the plastic sealing and glue sealing processes of diamond wire saws, the position of the wire rope in the matrix hole may become eccentric, causing the rigid matrix end to come into direct contact with the wire rope, which may break prematurely due to stress during cutting.

[0004] There are existing reports on the application of matrix-free diamond beads in diamond wire saws. For example, invention patent CN102825254A discloses a diamond bead, its preparation method, and a diamond beaded wire saw that does not require a matrix support layer. By using matrix-free diamond beads, the outer diameter of the beads is reduced, resulting in a diamond wire saw with a smaller outer diameter, thereby reducing the kerf. In addition, since the beads are formed in one piece, the process is simplified and the production cost of diamond beads is reduced. However, this invention does not solve the problem of the connection between the matrix-free beads and the steel wire rope. Moreover, the inner end face of the matrix-free beads is at a right angle, which makes the steel wire rope prone to shearing and breakage during use due to internal bending. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a baseless beaded diamond wire saw that can effectively reduce or even avoid the phenomenon of wire rope being sheared and broken due to internal bending of the wire rope during use.

[0006] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0007] A type of matrix-free bead includes a bead body, which has a cylindrical structure and is formed by molding and sintering a matrix powder containing diamond abrasive grains and metal or alloy powder. The bead body is characterized by having an inner hole penetrating both ends of the bead body in the axial direction, the diameter of the inner hole expanding from one end to the other, and the two ends of the inner hole transitioning to the end faces of the bead body via an arc-shaped connecting surface, a stepped connecting surface, or a serrated connecting surface.

[0008] Furthermore, the taper of the inner hole is 1:50 to 1:200.

[0009] This utility model also provides a matrix-free diamond wire saw, including a steel wire rope and beads fixedly sleeved on the steel wire rope, wherein the beads are matrix-free beads with the above-described structure.

[0010] Compared with existing matrix-free diamond beads, the features of this invention are as follows:

[0011] 1. The structure of the beads adopts a tapered shape with gradually increasing inner diameter, and the two ends of the inner hole are connected to the end face of the bead body by arc surface, stepped connecting surface or sawtooth connecting surface. After filling the gap between the beads and the wire rope with fixing material and fixing the beads to the wire rope by injection molding or other methods, a mechanical locking structure is formed between the two, thereby effectively reducing or even avoiding the phenomenon of wire rope being sheared and broken due to internal bending of the wire rope during use.

[0012] 2. The inner diameter of the beads in this utility model is gradually increasing, and the two ends of the inner hole are connected to the end face of the bead body by a non-right-angle connection surface design, which can accommodate more fixing material, thereby ensuring the bonding force between the beads and the wire rope while reducing the amount of organic adhesive used. Attached Figure Description

[0013] Figure 1 This is a cross-sectional schematic diagram of one embodiment of the substrate-free beaded system described in this utility model.

[0014] Figure 2 This is a cross-sectional schematic diagram of another embodiment of the substrate-free beaded system described in this utility model.

[0015] Figure 3 This is a cross-sectional schematic diagram of another embodiment of the substrate-free beaded system described in this utility model.

[0016] The numbers on the map are:

[0017] 1. No base beaded surface, 2. Inner hole, 3. Arc-shaped connecting surface, 4. Stepped connecting surface, 5. Serrated connecting surface. Detailed Implementation

[0018] To better explain the technical solution of the present invention, the present invention will be further described in detail below with reference to the embodiments, but the implementation of the present invention is not limited thereto.

[0019] The matrix-free bead 1 of this utility model includes a bead body, which has a cylindrical structure and is formed by molding and sintering a matrix powder containing diamond abrasive grains and metal or alloy powder. The bead body has an inner hole 2 penetrating both ends of the bead body in the axial direction and the cross-sectional shape of the inner hole 2 is circular. The diameter of the inner hole 2 gradually increases from one end to the other end. The two ends of the inner hole 2 are connected to the end face of the bead body by an arc-shaped connecting surface 3, a stepped connecting surface 4, or a sawtooth connecting surface 5, respectively, as shown in the figure. Figure 1 , Figure 2 and Figure 3 As shown.

[0020] In the technical solution described in this utility model, the composition and proportion of the carcass powder are the same as those used in the working layer of the carcass in the prior art with or without matrix beads.

[0021] The substrate-free bead 1 described in this utility model has the same dimensions as existing substrate-containing or substrate-free bead 1. Specifically, the height of the substrate-free bead 1 described in this utility model is 3.0~11.0mm, and its outer diameter is typically controlled between 2.0~15.0mm.

[0022] Furthermore, the inner hole 2 on the bead body is a tapered hole with a smaller top and a larger bottom, and the taper of the inner hole 2 is 1:50~1:200.

[0023] Furthermore, this utility model also provides a matrix-free diamond wire saw, including a steel wire rope and beads fixedly sleeved on the steel wire rope, wherein the beads are matrix-free beads 1 with the above-described structure. Specific Implementation Example 1

[0025] See Figure 1 As shown in the structure, the cross-sectional shape of the inner hole 2 on the bead body is circular, and the diameter of the inner hole 2 gradually increases from the top end to the bottom end. The two ends of the inner hole 2 are connected to the end face of the bead body by an arc-shaped connecting surface 3. Specific Implementation Example 2

[0027] See Figure 2 As shown in the structure, the cross-sectional shape of the inner hole 2 on the bead body is circular, and the diameter of the inner hole 2 gradually increases from the top end to the bottom end. The two ends of the inner hole 2 are connected to the end face of the bead body by a stepped connecting surface 4. Specific Implementation Example 3

[0029] See Figure 3 As shown in the structure, the cross-sectional shape of the inner hole 2 on the bead body is circular, and the diameter of the inner hole 2 gradually increases from the top end to the bottom end. The two ends of the inner hole 2 are connected to the end face of the bead body by a sawtooth-shaped connecting surface 5.

Claims

1. A matrix-free bead (1), comprising a bead body, said bead body having a columnar structure, formed by molding and sintering a matrix powder containing diamond abrasive grains and metal or alloy powder, characterized in that, The bead body has an inner hole (2) that runs through the upper and lower ends of the bead body in the axial direction. The diameter of the inner hole (2) expands from one end of the inner hole (2) to the other end. The two ends of the inner hole (2) are connected to the end face of the bead body by an arc-shaped connecting surface (3), a stepped connecting surface (4), or a sawtooth connecting surface (5).

2. The matrix-free beaded string (1) according to claim 1, characterized in that, The taper of the inner hole (2) is 1:50~1:

200.

3. A matrix-free diamond wire saw, comprising a steel wire rope and beads fixedly sleeved on the steel wire rope, characterized in that, The beads are the matrix-free beads (1) as described in claim 1 or 2.

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