Self-lubricating cemented carbide beads

Abstract

To provide self-lubricating cemented carbide beads which improve the wear resistance between a bead base and a wire rope and can effectively prevent breakage of a wire saw and inability of the bead base to function due to wear. [Solution] The self-lubricating cemented carbide beads include a bead substrate 1, the bead substrate being a cylinder, the bead substrate having a chamber 10, the chamber axially penetrating the cylinder, the inner wall of the chamber being provided with several blind holes 2, the blind holes being provided with lubricating material 3, and the outer wall of the bead substrate being provided with cemented carbide abrasive grains 4. The self-lubricating cemented carbide beads of the present invention can supply lubricating material to the friction interface between the bead substrate and the wire rope during the working process, which plays a role of lubrication.

Description

[Technical field]

[0001] The present invention relates to the technical field of beads, and in particular to self-lubricating cemented carbide beads. [Background technology]

[0002] When raising a very large sunken ship, if the weight of the sunken ship is too great or if the strength of the sunken ship is not strong enough to withstand the lifting force, it is difficult to raise it as a whole. In this case, underwater cutting technology can be used to cut the steel plates and steel sections of the sunken ship, and then the pieces can be raised in pieces. Cutting with a wire saw with beads in the shape of a rosary is one type of underwater cutting technology. Cutting with a wire saw with beads in the shape of a rosary was first used for the mining and processing of stone, and in recent years, through research by domestic and foreign engineers, it has been introduced into specialized fields such as the maintenance of undersea parts and the salvage of sunken ships and sunken objects.

[0003] Current wire saws with beads arranged in a beaded pattern are prone to friction caused by the relative movement of the wire rope and the bead base when used underwater, which can lead to the wire rope breaking or the bead base becoming worn and unable to function, shortening the life of the beads and compromising cutting quality and work efficiency, so improvement is needed.

[0004] In view of this, the present invention is provided. Summary of the Invention [Problem to be solved by the invention]

[0005] The present invention aims to provide a self-lubricating cemented carbide bead that can solve the technical problems existing in the prior art, such as wire ropes being easily broken and bead bases being easily worn out and unable to function, etc. The self-lubricating cemented carbide bead of the present invention can supply a lubricating material that plays a lubricating role to the friction interface between the bead base and the wire rope during the working process, thereby improving the wear resistance between the bead base and the wire rope, and effectively preventing the wire saw from breaking and the bead base from being worn out and unable to function. [Means for solving the problem]

[0006] In order to achieve the above objectives of the present invention, the following technical solutions are particularly adopted:

[0007] The self-lubricating cemented carbide beads comprise a bead substrate, the bead substrate being a cylinder, the bead substrate having a chamber, the chamber axially penetrating the cylinder, the inner wall of the chamber being provided with several blind holes, a lubricating material being disposed in the blind holes, and cemented carbide abrasive grains being disposed on the outer wall of the bead substrate.

[0008] In the above technical solution, the lubricating material further includes graphite.

[0009] In the above technical solution, further, the number of the blind holes is A;

[0010]

number

[0011] In the above technical solution, further, the depth of the blind hole is H;

[0012]

number

[0013] In the above technical solution, further, the blind holes are distributed in a spiral line on the inner wall of the chamber, or are distributed at equal intervals in the circumferential direction and offset in the axial direction.

[0014] In the above technical solution, further, the blind hole is a circular hole.

[0015] In the above technical solution, further, the blind holes are distributed in a helical line on the inner wall of the chamber, the helical pitch of the helical line distribution is 1 to 3 times the diameter of the blind holes, and the step interval percentage of the helical line distribution is 1% to 5%.

[0016] In the above technical solution, further, the blind holes are distributed on the inner wall of the chamber at equal intervals in the circumferential direction and shifted in the axial direction, and the distance on the arc surface between the centers of two adjacent blind holes arranged circumferentially at the same height in the axial direction is 1 / 6 to 1 / 3 of the perimeter of a circular cross section of the chamber at that height in the axial direction, and the axial distance between two circular cross sections formed by connecting the centers of the blind holes in two layers adjacent in the axial direction is 1.5 to 3 times the diameter of the blind holes.

[0017] In the above technical solution, furthermore, the shape of the inner wall of the chamber is a hyperboloid of one sheet.

[0018] In the above technical solution, furthermore, a notch is provided on both ends of the inner wall of the chamber, and the included angle between the notch and the end face of the bead substrate is 5 to 75°.

[0019] In the above technical solution, the cemented carbide abrasive grains and the outer wall of the bead substrate are further fixedly connected to each other.

[0020] In the above technical solution, furthermore, the particle size of the cemented carbide abrasive grains is 2 to 10 mm. Effect of the Invention

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The self-lubricating cemented carbide beads of the present invention have blind holes on the inner walls of their chambers, and lubricating material is placed in the blind holes. When the wire rope and the bead base slide relative to each other, the lubricating material can constantly supply lubricating material to the surface through the effects of friction, pressure and heat to form a relatively stable lubricating film. As the lubricating material itself is consumed, it constantly supplies solid lubricant, preventing direct contact between the two friction surfaces and fulfilling its lubricating role. This improves the wear resistance of the bead base and the wire rope, and effectively prevents the wire saw from breaking and the bead base from being unable to function due to wear. [Brief description of the drawings]

[0023] In order to more clearly describe the specific embodiments of the present invention or the technical solutions in the prior art, the drawings used in the specific embodiments or the prior art are briefly described below. The drawings described show some embodiments of the present invention. Those skilled in the art can obtain other drawings based on these drawings without using their design ability. [Figure 1] 1 is a schematic diagram showing the overall structure of a self-lubricating cemented carbide bead according to an embodiment of the present invention; FIG. [Diagram 2] 1 is a cross-sectional view of a self-lubricating cemented carbide bead according to an embodiment of the present invention. [Diagram 3] 4 is a schematic diagram of a spirally distributed blind hole according to one embodiment of the present invention; FIG. [Figure 4] FIG. 10 is a schematic diagram of blind holes that are equally spaced in the circumferential direction and offset in the axial direction according to another embodiment of the present invention; [Diagram 5] 1 is a plan view of a self-lubricating cemented carbide bead according to an embodiment of the present invention; FIG. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0024] The technical solution of the present invention will be described below clearly and completely with the aid of drawings and specific embodiments. As those skilled in the art will understand, the described examples are only some of the examples of the present invention, not all of the examples, and are only for illustrating the present invention, and do not limit the scope of the present invention. Based on the examples in the present invention, all other examples obtained by those skilled in the art without using their inventive abilities also belong to the scope of protection of the present invention. In the examples, for which specific conditions are not specified, they can be carried out under conventional conditions or conditions recommended by the manufacturer. For reagents or instruments for which the manufacturer is not specified, conventional products available on the market can be used.

[0025] In the description of the present invention, the directions or positional relationships expressed by terms such as "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", and "outside" are based on the drawings and are merely for the purpose of explaining the present invention simply and simply, and are not intended to limit the present invention, since the relevant devices or parts do not necessarily have a specific direction or are constructed or operated in a specific direction. In addition, the terms "first", "second", and "third" are merely for the purpose of explanation, and do not express or imply relative importance.

[0026] In the description of the present invention, unless otherwise specified, the terms "attached", "coupled" and "connected" should be understood reasonably. For example, they may be fixedly connected, detachably connected, or integrally connected. They may be mechanically connected or electrically connected. They may be directly connected, indirectly connected via an intermediate object, or the insides of two elements may communicate with each other. Those skilled in the art can understand the specific meanings of the above terms in the present invention according to the specific circumstances.

[0027] Unless there is a contradiction, the features in the embodiments of the present invention can be combined with each other.

[0028] As shown in Figures 1 and 2, an embodiment of the present invention provides a self-lubricating cemented carbide bead, which comprises a bead base 1, the bead base 1 being a cylinder, the bead base 1 having a chamber 10, the chamber 10 axially penetrating the cylinder, the chamber 10 being for inserting a wire rope, a number of blind holes 2 on the inner wall, a lubricating material 3 being placed in the blind hole 2, and cemented carbide abrasive grains 4 being placed on the outer wall of the bead base 1.

[0029] In this invention, a blind hole 2 is provided on the inner wall of the bead base 1 that comes into contact with the wire rope, and a lubricating material 3 is installed in the blind hole 2. When in use, the wire rope is driven by a driving device, and the wire rope and the bead base 1 move relative to each other. When the two move relative to each other, the lubricating material 3 supplies lubricating material to the contact surface through the effects of friction, pressure and heat to form a relatively stable lubricating film, and the lubricating material itself is consumed to constantly supply solid lubricant, preventing direct contact between the two friction surfaces and playing a lubricating role, thereby improving the wear resistance of the bead base 1 and the wire rope, and avoiding breakage of the wire rope or wear of the bead base 1.

[0030] In some specific embodiments of the present invention, the lubricating material 3 is fixed in the blind hole 2 by adhesive.

[0031] In some specific embodiments of the present invention, the lubricating material 3 is graphite.

[0032] In some specific embodiments of the present invention, the number of the blind holes 2 is A;

[0033]

number

[0034] If the ratio of the total area AS1 of the end faces of the open ends of all the blind holes 2 to the area S of the inner wall of the chamber 10 is within the above range, the self-lubricating effect can be achieved and the strength of the base can be guaranteed. If the proportion of the blind hole area is too large, the strength of the base decreases, and if it is too small, the self-lubricating effect is impaired.

[0035] In some specific embodiments of the present invention, the depth of the blind hole 2 is H,

[0036]

number

[0037] The purpose of rationally designing the depth of the blind hole 2 is to balance the self-lubricating effect and the strength of the substrate. In some other embodiments of the present invention, the diameter of the inner wall of the chamber 10 at different heights in the axial direction may vary, and when the inner wall of the chamber 10 has a variable diameter, R2 is the maximum radius of the chamber 10, that is, R1-R2 is the wall thickness of the bead substrate at its thinnest point (as shown in FIG. 5).

[0038] For example, in different embodiments, the blind holes 2 can be circular holes, square holes, polygonal holes or any other shapes of holes, as long as they can accommodate the lubricating material 3 and supply the lubricating material 3 to the friction interface during the working process. In order to achieve the self-lubricating effect and ensure the strength of the bead substrate, the number, depth and end surface area of ​​the blind holes 2 need to be set within a certain range, and within the above range, they can be adjusted according to actual needs.

[0039] In the above technical solution, the blind holes 2 are further arranged in a spiral line on the inner wall of the chamber 10, or arranged at equal intervals in the circumferential direction and offset in the axial direction. This arrangement allows the wire rope to be lubricated at different heights around the circumference and in the axial direction, and improves the uniformity of lubrication.

[0040] In some preferred embodiments of the present invention, the blind hole is a circular hole with a radius R, and the radius R and the number A of the blind holes are

[0041]

number

[0042] In some specific embodiments of the present invention, the blind holes 2 are distributed in a helical line on the inner wall of the chamber 10 (as shown in FIG. 3), the helical pitch of the helical distribution is 1-3 times the diameter of the blind holes 2, and the step interval percentage of the helical distribution is 1%-5%. The helical pitch is the distance between two adjacent threads, and the step interval percentage is the percentage of the arc length distance between the centers of two adjacent holes in the helical line to the arc length of the entire helical line.

[0043] In different embodiments, the helical pitch can be any one of the following values: 1, 1.5, 2, 2.5, 3 times the diameter of the blind hole, or a value in a range of any two values; and the step interval percentage can be any one of the following values: 1%, 2%, 3%, 3.2%, 4%, 5%. Since the helical pitch and the step interval percentage are related to the number and size of the blind holes, the number, size and distribution of the blind holes 2 can be reasonably designed to ensure the strength of the base and achieve uniform lubrication of the wire rope. In a specific embodiment of the present invention, the blind hole has a radius of 10 mm, a helical pitch of 10 mm, and a step interval percentage of 3.2%.

[0044] In some other specific embodiments of the present invention, the blind holes 2 are distributed on the inner wall of the chamber 10 at equal intervals in the circumferential direction and offset in the axial direction (as shown in FIG. 4 ), and the distance on the arc surface between the centers of two adjacent blind holes 2 arranged circumferentially at the same axial height is 1 / 6 to 1 / 3 of the perimeter of a circular cross section of the chamber 10 at the same axial height, and the axial distance between two circular cross sections formed by connecting the centers of the blind holes 2 of two layers adjacent in the axial direction is 1.5 to 3 times the diameter of the blind holes.

[0045] Distributing the blind holes 2 at equal intervals in the circumferential direction and offset in the axial direction means that the blind holes 2 in two adjacent layers in the axial direction are offset and the blind holes 2 in each layer are distributed at equal intervals. For example, at a certain height in the axial direction, four blind holes are provided along the circumferential direction, and the four blind holes are located at 12 o'clock, 3 o'clock, 6 o'clock, and 9 o'clock, respectively, and the number of blind holes 2 in the two layers above and below the blind holes 2 in the axial direction adjacent to the blind holes 2 in the layer is also four, and they are located between 12 o'clock and 3 o'clock, between 3 o'clock and 6 o'clock, between 6 o'clock and 9 o'clock, and between 9 o'clock and 12 o'clock, respectively.

[0046] The distribution method of distributing the lubricants at equal intervals in the circumferential direction and offset in the axial direction ensures the strength of the steel base and allows the entire circumference of the wire rope to be lubricated.

[0047] If the distance on the arc surface between the blind holes 2 of each layer and the axial distance between the blind holes 2 of two adjacent layers are rationally designed, the lubricating effect and the strength of the substrate can be balanced; if they are too close, the strength of the substrate will decrease, and if they are too far apart, the lubricating effect will be impaired.

[0048] In different embodiments, the distance on the arc surface between the centers of two adjacent blind holes 2 arranged circumferentially at the same axial height is 1 / 6, 1 / 5, 1 / 4 or 1 / 3 of the perimeter of the circular cross section of the chamber 10 at that axial height, and the axial spacing between two circular cross sections formed by connecting the centers of two axially adjacent layers of blind holes 2 can be any one of 1.5 times, 2 times, 2.5 times, and 3 times the blind diameter, or a value in a range consisting of any two values.

[0049] In a specific embodiment of the present invention, the diameter of the blind hole 2 is 10 mm, the number of blind holes arranged in each layer along the circumferential direction is six, the distance on the arc surface between the centers of two adjacent blind holes in the same layer is 1 / 6 of the circumference of the circular cross section formed by connecting the centers of the six blind holes along the inner wall of the chamber 10, and the axial distance between the two circular cross sections formed by connecting the centers of the blind holes in two adjacent layers is 15 mm.

[0050] In some specific embodiments of the present invention, the shape of the inner wall of the chamber 10 is a one-sheet hyperboloid, and the openings at both ends of the chamber 10 are flared outward, that is, the diameter of the middle part of the chamber 10 in the axial direction is smaller than the diameters at both ends, thus reducing the friction between the wire rope and the inner wall of the base and extending the service life of the wire rope.

[0051] In some specific embodiments of the present invention, the inner wall of the chamber 10 has a notch 5 at both ends, and the included angle between the notch 5 and the end face of the bead substrate 1 is 5 to 75°.

[0052] In this device, by providing notches 5 on both ends of the inner wall of the chamber 10, both ends of the inner wall of the bead base 1 have tapered openings, and these openings at both ends do not come into contact with the wire rope during use. This prevents the wire rope from being cut by the openings at both ends of the bead base 1, reduces wear on the wire rope, and effectively prevents the wire saw from breaking.

[0053] For example, in different embodiments, the included angle between the notch 5 and the end face of the bead substrate 1 is any one of 5°, 15°, 30°, 45°, 60°, and 75°, or a range consisting of any two of these values.

[0054] In some specific embodiments of the present invention, the cemented carbide abrasive grains 4 are fixedly connected to the outer wall of the bead substrate 1, and the fixed connection includes a soldering connection.

[0055] In the present invention, the cemented carbide abrasive grains 4 and the bead substrate 1 are metallurgically bonded, so that the cemented carbide abrasive grains 4 are not easily dropped off and the service life of the beads is long.

[0056] In the above technical solution, furthermore, the grain size of the cemented carbide abrasive grains 4 is 2 to 10 mm.

[0057] For example, in different embodiments, the grain size of the cemented carbide abrasive grains 4 is any one of 2 mm, 4 mm, 6 mm, 8 mm, and 10 mm, or a range consisting of any two of these values.

[0058] Although the present invention has been described using specific embodiments, the above embodiments are merely for illustrating the technical solution of the present invention, and are not intended to limit it. As can be understood by those skilled in the art, without departing from the spirit and scope of the present invention, the technical solution described in the above embodiments may be modified, and some or all of the technical features therein may be replaced with equivalents. These modifications or replacements do not cause the essence of the corresponding technical solution to depart from the scope of the technical solution of each embodiment of the present invention. Therefore, the appended claims include all replacements and modifications that fall within the scope of the present invention. [Explanation of symbols]

[0059] 1 Bead substrate 10. Chamber 2 Blind Hole 3 Lubricating materials 4. Carbide abrasive grains 5 Notch

Claims

1. The bead substrate is a cylinder, the bead substrate has one chamber, the chamber axially passes through the cylinder, the chamber has several blind holes on the inner wall, a lubricating material is placed in the blind holes, and cemented carbide abrasive grains are placed on the outer wall of the bead substrate.

2. A self-lubricating cemented carbide bead comprising:

2. The lubricating material includes graphite.

2. The self-lubricating cemented carbide bead according to claim 1 .

3. The number of the blind holes is A; [0010] where S １ is the area of ​​the end face of the open end of the blind hole, and S is the area of ​​the inner wall of the chamber.

2. The self-lubricating cemented carbide bead according to claim 1 .

4. The depth of the blind hole is H, [0025] where R １ is the radius of the outer wall of the bead substrate, R ２ is the radius of the inner wall of the chamber 2. The self-lubricating cemented carbide bead according to claim 1 .

5. The blind holes are distributed in a spiral line on the inner wall of the chamber, or are distributed at equal intervals in the circumferential direction and offset in the axial direction.

2. The self-lubricating cemented carbide bead according to claim 1 .

6. The blind hole is a circular hole.

6. The self-lubricating cemented carbide bead according to claim 5.

7. The blind holes are distributed in a helical line on the inner wall of the chamber, the helical pitch of the helical distribution is 1-3 times the diameter of the blind holes, and the step interval percentage of the helical distribution is 1%-5%.

7. The self-lubricating cemented carbide bead according to claim 6.

8. The blind holes are distributed on the inner wall of the chamber at equal intervals in the circumferential direction and shifted in the axial direction, and the distance on the arc surface between the centers of two adjacent blind holes provided along the circumferential direction at the same height in the axial direction is 1 / 6 to 1 / 3 of the perimeter of a circular cross section of the chamber at that height in the axial direction, and the axial distance between two circular cross sections formed by connecting the centers of the blind holes in two layers adjacent in the axial direction is 1.5 to 3 times the diameter of the blind holes.

7. The self-lubricating cemented carbide bead according to claim 6.

9. The shape of the inner wall of the chamber is a one-sheet hyperboloid.

2. The self-lubricating cemented carbide bead according to claim 1 .

10. The chamber has an inner wall with a notch at each end, and the angle between the notch and the end face of the bead substrate is 5 to 75 degrees.

2. The self-lubricating cemented carbide bead according to claim 1 .

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