Diamond wire saw bead structure suitable for sulfur-containing working condition

Abstract

The diamond wire saw bead structure suitable for the sulfur-containing working condition comprises a base body and a matrix working layer fixedly arranged on the outer wall of the base body, a through hole extending in the axial direction is formed in the center of the base body, and the axial length of the base body is larger than that of the matrix working layer. Two longitudinal grooves penetrating through the axial length of the tire body working layer are formed in the peripheral surface of the tire body working layer, and are perpendicular to two end surfaces of the tire body working layer. The longitudinal grooves which are perpendicular to the upper end face and the lower end face of the tire body working layer and penetrate through the tire body working layer in the axial length direction are formed in the peripheral face of the tire body working layer, so that when axial cutting feed is adopted for mining sulfur-containing ore, the chip removal and drainage capacity can be improved, the cutting efficiency and the cutting service life are guaranteed, and the service life of the tire body working layer is prolonged. And meanwhile, the steel wire rope can be better protected from being broken.

Description

Technical Field

[0001] The utility model relates to diamond wire saw beads, in particular to a diamond wire saw bead structure suitable for sulfur-containing working conditions. Background Technique

[0002] Sulfur-containing minerals are very widely distributed in nature and there are many types, occurring in two forms: elemental sulfur and combined sulfur. The main industrial minerals and compounds of sulfur are: native sulfur, pyrite, marcasite, pyrrhotite, organic sulfur, hydrogen sulfide, and sulfur in non-ferrous metal sulfides. The minerals that can be used as sulfur ores in combined sulfur mainly include: pyrite (FeS 2 ), marcasite (FeS 2 ), pyrrhotite (Fe 1-x S), etc. Among them, pyrite with a sulfur content of 53.4% is the most widely distributed and is the most important sulfur ore in China. Marcasite and pyrrhotite have a lower sulfur content, limited distribution, and little industrial significance.

[0003] In the existing underground mining of sulfur-containing tungsten ore, when developing roadways and stopes in the mine, ore is obtained by drilling holes around the ore body vein and filling explosives in the holes for blasting. However, the ore contains pyrite crystals. During the blasting process, the sulfur element in the sulfur crystals is extremely easy to burn and reacts chemically with various elements. After blasting, ventilation is required for at least 72 hours, and only when the air quality is qualified can ore transportation operations be carried out in the roadway. On the one hand, it affects efficiency, and there is also a risk of ore body collapse during large-scale blasting, resulting in poor production safety; on the other hand, the sulfides remaining in the air after blasting are highly toxic and harmful to the health of on-site workers.

[0004] The diamond wire saw for mining, with a steel wire rope as the carrier, is a flexible ultra-hard material mining tool. It is not restricted by factors such as the space size of the roadway, the mining area, and the mining shape, and can carry out operations. Moreover, during the cutting process, the noise is small, it does not affect the main structure of the ore vein, and ore transportation operations can be immediately carried out after cutting, which is safe, efficient, and environmentally friendly, and is a new type of underground mining method. The outer periphery of the working layer of the matrix of traditional beads is smooth (without grooves, such as Figure 1As shown in the figure, on the one hand, this results in a relatively small rotational frictional torque between the beads and the material to be cut. On the other hand, the cut powder will accumulate on the surface of the material to be cut, resulting in poor cutting effect and having certain limitations. To solve this problem, the utility model with the publication number CN206765108U proposes a bead for a diamond wire saw that can timely discharge cutting scraps, including a steel wire rope, a bead body, a spacer sleeve, and a dust-proof sleeve. The bead body includes a sleeve and an abrasive layer. The sleeve is sleeved on the steel wire rope, and there is a gap between the inner wall of the sleeve and the steel wire rope. The sleeve can rotate around the steel wire rope as the axis on the periphery of the steel wire rope. An abrasive layer is provided on the outer wall of the sleeve. The outer peripheral cross-section of the abrasive layer is in a "C" shape, and four spiral grooves with an inclination angle of 5-15° are equidistantly arranged on the surface of the abrasive layer. The spacer sleeve is installed between two adjacent bead bodies, and a dust-proof sleeve for preventing dust from entering the beads is installed on the outer wall of the spacer sleeve. This utility model increases the frictional force between the abrasive layer and the material to be cut by opening inclined rotating grooves on the bead surface, and at the same time achieves the purpose of discharging cutting powder and preventing blockage. In the actual operation of underground mining of sulfur-containing ores, the diamond wire saw cuts axially. The applicant finds that using the above-mentioned spiral grooves with an inclination angle will affect the chip removal and drainage ability during the cutting process, and the cutting efficiency is not ideal. In addition, there are many rotating grooves provided in the abrasive layer, and less abrasive participates in the work, resulting in too fast wear, affecting the cutting life, and the dust-proof sleeve part is easily corroded by sulfides, resulting in frequent wire breaks of the steel wire rope. Summary of the Utility Model

[0005] The technical problem to be solved by this utility model is to provide a diamond wire saw bead structure suitable for sulfur-containing working conditions with good chip removal and drainage effects during cutting and high cutting efficiency.

[0006] To solve the above technical problems, this utility model adopts the following technical solutions:

[0007] A diamond wire saw bead structure suitable for sulfur-containing working conditions, including a matrix and a matrix working layer fixedly arranged on the outer wall of the matrix. A through hole extending axially is opened in the center of the matrix. The axial length of the matrix is greater than that of the matrix working layer. Two longitudinal grooves penetrating the axial length of the matrix working layer are opened on the outer peripheral surface of the matrix working layer, and the longitudinal grooves are perpendicular to the upper and lower end faces of the matrix working layer.

[0008] Preferably, the two longitudinal grooves are symmetrically arranged on the outer peripheral surface of the matrix working layer.

[0009] For beads with an outer diameter of , preferably, the width of the longitudinal groove is 1.0-2.0 mm, and the recessed depth is 0.8-1.5 mm; more preferably, the width of the longitudinal groove is 1.5 mm, and the recessed depth is 1.0 mm.

[0010] Compared with the prior art, the utility model improves the chip removal and drainage capabilities during the underground mining of sulfur-containing ores by axial cutting feed by providing longitudinal grooves on the outer peripheral surface of the carcass working layer that are perpendicular to the upper and lower end faces of the carcass working layer and penetrate the axial length of the carcass working layer. This ensures the cutting efficiency and cutting life, and also better protects the wire rope from breaking. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 FIG. is a schematic structural diagram of a conventional diamond wire saw bead.

[0012] Figure 2 FIG. is a schematic structural diagram of the diamond wire saw bead structure suitable for sulfur-containing working conditions according to the utility model.

[0013] Figure 3 is Figure 2 a top view of the illustrated embodiment.

[0014] The reference numerals in the figures are:

[0015] 1 matrix, 2 carcass working layer, 3 longitudinal groove, 4 end face. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] Referring to Figure 2 and Figure 3 , the diamond wire saw bead structure suitable for sulfur-containing working conditions according to the utility model includes a matrix 1 and a carcass working layer 2. The matrix 1 is cylindrical and has a through hole extending axially in its center. The carcass working layer 2 is cylindrical and has an outer peripheral surface and upper and lower end faces 4. The carcass working layer 2 is fixedly arranged on the outer wall of the matrix 1. The axial length of the matrix 1 is greater than that of the carcass working layer 2. Two longitudinal grooves 3 penetrating the axial length of the carcass working layer 2 are provided on the outer peripheral surface of the carcass working layer 2, and the longitudinal grooves 3 are perpendicular to the upper and lower end faces 4 of the carcass working layer 2. The matrix 1 serves as the main structure of the bead and is used to install and carry components such as the carcass working layer 2. The through hole provided at the center of the matrix 1 allows the wire rope to pass through, facilitating the production of the diamond wire saw. Preferably, the material of the matrix 1 can be 45# steel. The carcass working layer 2 serves as the cutting layer that contacts the material to be cut during actual work and has a good cutting effect on the material to be cut. Specifically, the carcass working layer 2 is made of a quantitatively mixed diamond particles and carcass powder, and existing conventional formulations can be used. The matrix 1 and the carcass working layer 2 are usually combined by hot pressing and sintering.

[0017] In practical work, the applicant found that when mining sulfur-containing ore by means of axial cutting feed, setting the longitudinal groove 3 perpendicular to the upper and lower end faces 4 of the matrix working layer 2 can improve the cutting efficiency and cutting life of the wire saw, and can also better protect the wire rope from breaking. During the cutting of sulfur-containing ore by the beads, the sulfides generated will increase the surface temperature of the beads, resulting in the passivation of the surface diamond, the decrease of the matrix holding force, the decrease of the cutting efficiency, and serious wear of the beads. By designing the longitudinal groove 3 of the beads, the cooling water and stone chips can be better discharged, and the heat generated during cutting can be transferred out in time, reducing the cutting resistance and meeting the cutting requirements.

[0018] It is preferable that the number of the longitudinal grooves 3 is 2. Too many will reduce the impact strength of the beads themselves, cause increased wear, and further reduce the life of the diamond wire saw; too few will not achieve satisfactory chip removal and drainage effects. Preferably, the two longitudinal grooves 3 are symmetrically arranged on the outer peripheral surface of the matrix working layer 2.

[0019] For the beads with an outer diameter of , the length of the longitudinal groove 3 is the same as that of the matrix working layer 2, its width is preferably 1.0 - 2.0 mm, and the recessed depth is preferably 0.8 - 1.5 mm; further preferably, the width of the longitudinal groove 3 is 1.5 mm and the recessed depth is 1.0 mm.

[0020] The following conventional Fe-based formula is used as the formula for the working layer of the beads, and the same specification is made by the existing conventional method of the traditional beads with the structure as shown in Figure 1 , the beads of the present invention with the structure as shown in Figure 2 . The prepared beads are respectively made into diamond wire saws (the quantity is the same, both are 70 meters), and are respectively installed on the same equipment (mine exploitation wire saw MTB75) produced by the applicant, and tested in a sulfur-containing tungsten ore mining site in Guangxi. The results are shown in Table 1 below.

[0021] Bead working layer formula (or bead abrasive layer formula): By weight percentage, it consists of 55% Fe powder (particle size 200 - 300 mesh), 10% Cu powder (particle size 200 - 300 mesh), 15% CuSn alloy powder (300 mesh), 10% T255 Ni powder (200 - 300 mesh), 10% W powder (4 - 6 μm), and 25% diamond particles (the diamond particles are composed of three particle sizes of 20 / 25, 25 / 30, and 30 / 35, among which the diamond particles with a particle size of 20 / 25 account for 50 wt%, the diamond particles with a particle size of 25 / 30 account for 30 wt%, and the diamond particles with a particle size of 30 / 35 account for 20 wt%).

[0022] Table 1

[0023]

Claims

1. A diamond wire saw bead structure suitable for sulfur-containing working conditions, comprising a base (1) and a carcass working layer (2) fixedly arranged on the outer wall of the base (1), wherein a through hole extending in the axial direction is opened at the center of the base (1), and the axial length of the base (1) is greater than that of the carcass working layer (2), wherein: Two longitudinal grooves (3) are provided on the outer peripheral surface of the carcass working layer (2) and penetrate the axial length of the carcass working layer (2). The longitudinal grooves (3) are perpendicular to the upper and lower end surfaces (4) of the carcass working layer (2).

2. The diamond wire saw bead structure suitable for sulfur-containing working conditions according to claim 1 is characterized in that: Two longitudinal grooves (3) are symmetrically arranged on the outer peripheral surface of the carcass working layer (2).

3. The diamond wire saw bead structure suitable for sulfur-containing working conditions according to claim 1 or 2, characterized in that: Based on the outer diameter The beads, the width of the longitudinal groove (3) is 1.0 to 2.0 mm, and the depth of the recess is 0.8 to 1.5 mm.

4. The diamond wire saw bead structure suitable for sulfur-containing working conditions according to claim 1 or 2, characterized in that: Based on the outer diameter The beads have a width of 1.5 mm and a recessed depth of 1.0 mm.

Images