Wear-resistant shield hob cutter

Abstract

The utility model discloses a wear-resistant shield hob cutter. The wear-resistant shield hob cutter comprises a cutter body, the plurality of convex parts are arranged on the outer circumferential surface of the cutter body; the plurality of lug bosses are arranged in an array to form a lug boss array; at least one groove is formed in the surface, away from the cutter body, of the protruding part. According to the coupling bionics principle, by analyzing the surface of a natural organism, the protruding parts are arranged on the surface of the cutter body, the grooves are formed in the surfaces of the protruding parts, and therefore the bionic non-smooth structure surface is formed on the cutter body; according to the shield hob cutter, the rolling contact stress borne by the cutter body can be reduced, crack initiation and propagation in multiple directions are restrained, the contact area with materials is reduced, and therefore abrasion of the cutter body is remarkably reduced, the stability of the shield hob cutter is improved, and the service life of the shield hob cutter is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of hob tools, in particular to a wear-resistant shield hob tool. Background Art

[0002] As the main working component of a shield machine, the hob tool plays roles such as rock breaking, soil excavation, face stability, and muck agitation during shield tunneling. During shield tunneling construction operations, the structural form and tool configuration of the tool directly affect the economic benefits of shield construction.

[0003] The surface of the existing shield machine hob tool is smooth. For its structure, it is easily worn by the erosion of muck during long-term operation, which can easily cause tool wear, seriously affect the strength of the tool, and shorten the service life of the shield machine hob tool.

[0004] Therefore, the existing technology still needs to be improved and developed. Summary of the Utility Model

[0005] The technical problem to be solved by the utility model is to provide a wear-resistant shield hob tool aiming at the above-mentioned defects of the existing technology, aiming to solve the problems of easy tool wear and shortened service life in the existing technology.

[0006] The technical solution adopted by the utility model to solve the technical problem is as follows:

[0007] A wear-resistant shield hob tool, which includes a tool body, and further includes:

[0008] A plurality of protrusions, arranged on the outer circumferential surface of the tool body; the plurality of protrusions are arranged in an array to form a protrusion array;

[0009] At least one groove is provided on the surface of the protrusion away from the tool body.

[0010] For the wear-resistant shield hob tool, wherein the grooves are multiple, and the multiple grooves are parallel to each other.

[0011] For the wear-resistant shield hob tool, wherein the extending direction of the groove is perpendicular to the rotation direction of the tool body.

[0012] For the wear-resistant shield hob tool, wherein the grooves are multiple, and the multiple grooves are arranged in a divergent manner.

[0013] For the wear-resistant shield hob tool, wherein the depths of every two adjacent grooves are not equal; along the arrangement direction of the multiple grooves, the depths of the grooves are arranged in a staggered manner of deep and shallow.

[0014] The wear-resistant shield cutter, wherein the surface of the raised portion away from the cutter body is an arc surface, and the height of the center of the arc surface protruding relative to the cutter body is the largest.

[0015] The wear-resistant shield cutter, wherein the raised portion has a major arc surface and a straight surface; the two ends of the major arc surface and the two ends of the straight surface are correspondingly connected; the major arc surface and the straight surface are arranged along the axial direction of the cutter body.

[0016] The wear-resistant shield cutter, wherein there is a gap between every two adjacent raised portions.

[0017] The wear-resistant shield cutter, wherein the value range of the gap is 0.1 mm to 3 mm.

[0018] The wear-resistant shield cutter, wherein in the array of the raised portions, every two adjacent rows of raised portions and every two adjacent columns of raised portions are staggeredly arranged.

[0019] Beneficial effects: According to the principle of coupling bionics, by analyzing the surface of organisms in nature, in the present application, the raised portions are arranged on the surface of the cutter body, and the grooves are arranged on the surface of the raised portions, so that the surface of the cutter body is no longer smooth, and the unevenness of the surface of the raised portions is increased, thereby forming a bionic non-smooth structure surface on the cutter body, which can reduce the rolling contact stress borne by the cutter body, inhibit the initiation and propagation of cracks in multiple directions, reduce the contact area with the material, thereby significantly reducing the wear of the cutter body, improving the stability of the shield cutter, and prolonging the service life of the shield cutter. Description of the Drawings

[0020] Figure 1 is a schematic structural diagram of the wear-resistant shield cutter in the present utility model;

[0021] Figure 2 is a reference diagram of the usage state in which the extending directions of multiple grooves in the present utility model are arranged in parallel;

[0022] Figure 3 is a schematic structural diagram of the raised portion in the present utility model;

[0023] Figure 4 is a reference diagram of the usage state in which multiple grooves in the present utility model are arranged in a divergent manner. Detailed Embodiments

[0024] The embodiments of the present utility model will be described below with reference to the accompanying drawings and preferred embodiments. Those skilled in the art can easily understand other advantages and effects of the present utility model from the content disclosed in this specification. The present utility model can also be implemented or applied through other different specific embodiments. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present utility model. It should be understood that the preferred embodiments are only for explaining the present utility model and not for limiting the protection scope of the present utility model.

[0025] It should be noted that the illustrations provided in the following embodiments only schematically illustrate the basic concept of the present utility model. Therefore, only the components related to the present utility model are shown in the drawings, rather than being drawn according to the number, shape, and size of the components in actual implementation. The type, quantity, and ratio of each component in actual implementation can be arbitrarily changed, and the component layout type may also be more complex.

[0026] The present utility model provides a wear-resistant shield cutter head tool, as Figure 1 , Figure 2 and Figure 3 shown. The wear-resistant shield cutter head tool includes a tool body 1 and a plurality of protrusions 2; the protrusions 2 are arranged on the outer circumferential surface of the tool body 1, and the plurality of protrusions 2 are arranged in an array to form a protrusion 2 array; at least one groove 3 is provided on the surface of the protrusion 2 away from the tool body 1.

[0027] The arrangement of the protrusions 2 on the surface of the tool body 1 makes the surface of the tool body 1 no longer smooth, but forms a bionic non-smooth structure surface, which can reduce the rolling contact stress borne by the tool body 1, and inhibit the initiation and propagation of cracks in multiple directions, thereby significantly reducing the wear of the tool body 1, improving the stability of the shield cutter head tool, and extending the service life of the shield cutter head tool.

[0028] At the same time, according to the principle of coupled bionics, by analyzing the surface of natural organisms, in this application, the groove 3 is provided on the surface of the protrusion 2 to further increase the unevenness of the surface of the protrusion 2; the groove 3 can help more effectively remove the chips generated by cutting, avoid the accumulation of chips and reduce the obstruction to the rotary cutting of the tool body 1; the groove 3 also increases the contact area between the surface of the tool body 1 and the coolant, which helps to better take away the heat generated by friction and improve the cooling effect of the tool body 1; more importantly, the design of the groove 3 can further reduce the contact area with the material, thereby reducing friction and wear and enhancing the wear resistance of the wear-resistant shield cutter head tool.

[0029] In one embodiment of this application, as Figure 2As shown, the convex portion 2 has a major arc surface 21 and a straight surface 22; both ends of the major arc surface 21 and both ends of the straight surface 22 are correspondingly connected. The major arc surface 21 and the straight surface 22 are arranged along the axial direction of the tool body 1, and the major arc surfaces 21 and the straight surfaces 22 of all the convex portions 2 are arranged along the axial direction of the tool body 1.

[0030] In this embodiment, the appearance shape of the convex portion 2, as well as the arrangement manner of the major arc surface 21 and the straight surface 22, enable the convex portion 2 to form a scale structure imitating a pangolin, which can effectively disperse the stress on the surface of the tool body 1; in this way, the friction and pressure generated when the wear-resistant shield cutter works can be more evenly distributed, and these convex structures can also provide additional physical protection against friction and impact forces, thereby reducing local wear.

[0031] Meanwhile, during the operation of the shield machine, the cut materials need to be discharged in time, and the scale-like convex portion 2 can help to discharge these materials more effectively, reducing the obstruction and wear on the tool. The convex portion 2 also helps with the heat dissipation of the tool because it increases the surface area and the flow of air, and can better carry away the heat generated by friction, keeping the tool within an appropriate temperature range.

[0032] Moreover, the major arc shape of the major arc surface 21 can more effectively reduce the friction with the material, better guide the fluid flow, reduce the obstruction to the tool, and help to provide a more uniform mechanical distribution, thereby improving the overall stability and durability of the tool, reducing the wear of the wear-resistant shield cutter, enhancing the chip removal ability and the cooling effect.

[0033] Therefore, in this application, the design of the bionic scale-like convex portion 2 optimizes the performance of the tool, extends its service life, and improves the working efficiency by simulating effective structures in nature.

[0034] In this embodiment, the major arc surfaces 21 and the straight surfaces 22 of all the convex portions 2 are arranged along the axial direction of the tool body 1, that is, the arrangement directions of the major arc surfaces 21 and the straight surfaces 22 of all the convex portions 2 are the same, so as to cut and discharge chips more effectively, make the tool operate more smoothly during work, and can provide more uniform structural support, improving the overall stability and durability of the wear-resistant shield cutter.

[0035] In one embodiment of this application, there are multiple grooves 3, such as Figure 2 shown ( Figure 2 the arrows in which indicate the extension directions of the grooves 3), and the multiple grooves 3 are parallel to each other.

[0036] It should be noted that the extending directions of the plurality of the grooves 3 are parallel to each other, and the extending direction of the groove 3 is the length direction of the groove 3. In this embodiment, the plurality of parallel grooves 3 can provide a more consistent fluid flow path, which helps to achieve stable chip removal and cooling effects, making the convex portion 2 easier to machine and manufacture. At the same time, the plurality of parallel grooves 3 can ensure that the tool surface has consistent performance in all directions, including friction performance and wear performance.

[0037] In one embodiment of this embodiment, the extending direction of the groove 3 is perpendicular to the rotation direction of the tool body 1. Then, the chips generated during the cutting process can be more easily discharged from the tool surface along the groove 3. This helps to prevent chip accumulation, avoid cutting blockage, and improve machining efficiency. Moreover, the arrangement of the extending direction of the groove 3 can reduce the contact area between the tool surface and the material to be cut, and can better guide the coolant to flow along the groove 3, ensuring that the coolant can cover the key surface areas of the tool. Thereby reducing the friction force, reducing the wear of the tool, prolonging the tool life, enhancing the heat dissipation, and preventing the tool from overheating.

[0038] At the same time, the extending direction of the groove 3 being perpendicular to the rotation direction of the tool body 1 helps to evenly distribute the stress on the tool surface during the rotation of the tool, reducing the risk of stress concentration, preventing the tool from deforming or being damaged, and also being able to produce a certain self-cleaning effect when the tool rotates. The chips and impurities are more easily removed under the action of centrifugal force, keeping the tool in a clean state.

[0039] In another embodiment of this application, there are a plurality of the grooves 3, such as Figure 4 shown, and the plurality of the grooves 3 are arranged in a divergent manner.

[0040] In this embodiment, the extending directions of the plurality of the grooves 3 are not parallel, but are arranged in a divergent manner, so that each groove 3 has an extending direction at a different angle. Then, the grooves 3 with different angles can better adapt to the cutting requirements in different directions, improve the chip removal effect, provide a more complex fluid path, and help to more effectively carry away the heat.

[0041] At the same time, the divergent groove 3 design in this embodiment can effectively guide the debris generated by cutting to the outer edge of the scale or the designated chip removal path, thereby reducing the accumulation of debris on the surface of the wear-resistant shield cutter, maintaining the smoothness of the cutting process, and helping to disperse the stress applied to the surface of the wear-resistant shield cutter more evenly, reducing stress concentration in a certain place, and reducing the risk of deformation or damage of the wear-resistant shield cutter; increasing the area in contact with the coolant, and the coolant can flow more evenly along the direction of the groove 3, thereby improving the heat dissipation efficiency, maintaining the temperature of the wear-resistant shield cutter stable, and also helping to automatically remove debris and impurities on the surface of the wear-resistant shield cutter, reducing the frequency of maintenance of the wear-resistant shield cutter.

[0042] In the present application, when there are multiple grooves 3 on the protruding portion 2, the depths of each two adjacent grooves 3 are not equal; along the arrangement direction of the multiple grooves 3, the depths of the grooves 3 are arranged in a staggered manner, such as Figure 3 shown.

[0043] The depths of the multiple grooves 3 on the raised portion 2 described in the present application are different, and along the arrangement direction of the multiple grooves 3, the depths of the grooves 3 are arranged in an alternating manner, so as to obtain a bionic non-smooth structural surface. This differentiated structural arrangement pattern can improve the material's resistance to rolling fatigue and wear. In other words, the groove 3 structures of different depth sizes have different positions of maximum shear stress. Compared with the single-depth groove 3 structural distribution method, the stress concentration layer fixed at a certain depth can be dispersed, which is conducive to the alleviation of stress concentration phenomenon. The embodiment of the macroscopic performance of the staggered distribution of depth and shallowness is smaller than the single-depth embodiment in terms of friction loss weight and better fatigue wear resistance.

[0044] At the same time, the deep grooves can accommodate more cutting debris, making chip removal smoother; the shallow grooves play an auxiliary role in chip removal, and work together with the deep grooves to reduce the accumulation of debris on the surface of the wear-resistant shield hob tool, thereby improving the overall chip removal efficiency; the deep grooves have more space to guide the flow of coolant, which helps to take away more heat, while the shallow grooves provide auxiliary cooling paths, so that the coolant can evenly cover the surface of the wear-resistant shield hob tool to maintain uniform temperature distribution. The staggered deep and shallow design can reduce the contact area between the surface of the wear-resistant shield hob tool and the cut material, especially in the deep groove area, where the friction is lower, thereby reducing the wear of the wear-resistant shield hob tool. Shallow grooves provide additional surface protection, further reducing the possibility of wear.

[0045] It should be noted that the depth of the groove 3 refers to the length of the groove 3 extending from the surface of the protrusion 2 away from the tool body 1 toward the tool body 1 .

[0046] In an embodiment of the present application, the depth difference between the deep groove and the shallow groove is 1 / 3 of the depth of the deep groove.

[0047] In this embodiment, the depth difference between the deep groove and the shallow groove is set to ensure that the overall strength of the surface of the wear-resistant shield cutter is not weakened by the overly deep groove 3, while the additional support provided by the shallow groove makes the wear-resistant shield cutter more stable during operation, preventing structural fatigue or damage. The design of alternating deep and shallow grooves helps to more evenly disperse stress, avoiding stress concentration in a single deep groove, thereby reducing the risk of deformation or damage to the wear-resistant shield cutter, taking into account chip evacuation, cooling, friction control, and structural strength, and improving the overall performance and lifespan of the wear-resistant shield cutter.

[0048] In an embodiment of the present application, the surface of the protrusion 2 away from the cutter body 1 is an arc surface, and the height by which the center of the arc surface protrudes relative to the cutter body 1 is the largest.

[0049] In this embodiment, the height by which the protrusion 2 protrudes relative to the surface of the cutter body 1 is arc-shaped along the cutter rotation direction, such that the surface of the protrusion 2 away from the cutter body 1 is an arc surface; and, the height by which the center of the arc surface protrudes relative to the cutter body 1 is the largest, that is, the center of the protrusion 2 is the thickest.

[0050] The scales of many organisms in nature usually have a curved arc surface. Therefore, in this embodiment, the surface of the protrusion 2 away from the cutter body 1 also adopts an arc surface, which is more in line with the scale design in nature, thereby better guiding fluid flow, reducing turbulence and resistance, providing a more uniform friction and wear distribution, and improving the chip evacuation effect and cooling performance.

[0051] In an embodiment of the present application, there is a gap between every two adjacent protrusions 2, that is, for the array formed by multiple protrusions 2, there is an interval arrangement between every two adjacent rows of protrusions 2 and between every two adjacent columns of protrusions 2; and, in the array of protrusions 2 formed by multiple protrusions 2, every two adjacent rows of protrusions 2 are arranged in a staggered manner, and every two adjacent columns of protrusions 2 are also arranged in a staggered manner.

[0052] Biological scales in nature generally have a laminated structure, which can play a good role in protection and wear resistance. However, in the process of bionic design, reasonable structural design should be carried out to extract key bionic elements. In the actual design of the tool surface structure, since the structure of the tool body 1 cannot achieve a laminated design, the protrusions 2 are arranged at intervals between every two adjacent rows and between every two adjacent columns of the protrusions 2, and the adjacent rows and columns of the protrusions 2 are arranged in a staggered manner, which can better imitate the scales on the surface of organisms and play a role in protecting the tool. Thus, while improving the wear resistance of the wear-resistant shield cutter tool, the requirements of the process manufacturing efficiency are met.

[0053] At the same time, the gap can effectively enhance the heat dissipation performance of the wear-resistant shield cutter tool, reduce the probability of damage to the wear-resistant shield cutter tool due to excessive temperature during continuous operation, and extend the service life of the wear-resistant shield cutter tool to a certain extent.

[0054] In an embodiment of the present application, the value range of the gap is 0.1 mm to 3 mm.

[0055] The spacing between adjacent protrusions 2 determines the distribution density of the bionic non-smooth structure per unit area of the tool, and this parameter significantly affects the wear resistance characteristics of the tool. When the spacing between the protrusions 2 is too small, the wear resistance efficiency of the tool will not continue to increase, but instead the processing difficulty and manufacturing efficiency will be improved; when the spacing between the protrusions 2 is too large, the wear resistance efficiency of the tool is not obvious. Therefore, considering the wear resistance efficiency and the processing technology comprehensively, the value range of the gap in the present application is taken as 0.1 mm to 3 mm.

[0056] In an embodiment of the present application, on the premise of ensuring reducing the frictional resistance on the tool surface and reducing the adhesion of muck, considering the drag reduction efficiency, the processing technology and the self-structural strength of the protrusions 2 comprehensively, the value range of the ratio of the width to the depth of the groove 3 is 0.2 to 1.

[0057] In an embodiment of the present application, the spacing between two adjacent grooves 3 on the protrusion 2 is 0.01 mm to 0.5 mm, and the number of the grooves 3 is 5 to 10, so as to improve the performance of the protrusion 2 in reducing the frictional resistance on the tool surface and reducing the adhesion of muck as much as possible on the premise of ensuring the self-structural strength of the protrusion 2 and the processing technology.

[0058] In summary, the present application provides an abrasion-resistant shield cutter, which includes a cutter body; a plurality of protrusions disposed on the outer circumferential surface of the cutter body; the plurality of protrusions are arranged in an array to form a protrusion array; at least one groove is provided on the surface of the protrusion away from the cutter body. According to the principle of coupled bionics, by analyzing the surface of organisms in nature, the protrusions are provided on the surface of the cutter body, and the grooves are provided on the surface of the protrusions, so that the surface of the cutter body is no longer smooth, and the unevenness of the surface of the protrusions is increased, thereby forming a bionic non-smooth structure surface on the cutter body, which can reduce the rolling contact stress borne by the cutter body, inhibit the initiation and propagation of cracks in multiple directions, reduce the contact area with the material, thereby significantly reducing the wear of the cutter body, improving the stability of the shield cutter, and prolonging the service life of the shield cutter.

[0059] It should be understood that the application of the present invention is not limited to the above examples. For those of ordinary skill in the art, improvements or transformations can be made according to the above description, and all such improvements and transformations should fall within the protection scope of the appended claims of the present invention.

Claims

1. A wear-resistant shield hob cutter, comprising a cutter body, characterized in that: It also includes: A plurality of protrusions are arranged on the outer circumferential surface of the tool body; the plurality of protrusions are arranged in an array to form a protrusion array; The surface of the protrusion away from the tool body is provided with at least one groove.

2. The wear-resistant shield hob cutter according to claim 1, characterized in that: There are multiple grooves, and the multiple grooves are parallel to each other.

3. The wear-resistant shield hob cutter according to claim 2, characterized in that: The extending direction of the groove is perpendicular to the rotation direction of the tool body.

4. The wear-resistant shield hob cutter according to claim 1, characterized in that: There are multiple grooves, and the multiple grooves are arranged in a divergent manner.

5. The wear-resistant shield hob cutter according to claim 2 or 4, characterized in that: The depths of every two adjacent grooves are not equal; along the arrangement direction of the plurality of grooves, the depths of the grooves are arranged alternately.

6. The wear-resistant shield hob cutter according to claim 1, characterized in that: The surface of the protrusion away from the tool body is an arc-shaped surface, and the center of the arc-shaped surface protrudes the greatest height relative to the tool body.

7. The wear-resistant shield hob cutter according to claim 1, characterized in that: The protrusion has a major arc surface and a straight line surface; two ends of the major arc surface are correspondingly connected with two ends of the straight line surface; the major arc surface and the straight line surface are arranged along the axial direction of the tool body.

8. The wear-resistant shield hob cutter according to claim 1, characterized in that: There is a gap between every two adjacent protrusions.

9. The wear-resistant shield hob cutter according to claim 8, characterized in that: The gap has a value range of 0.1 mm to 3 mm.

10. The wear-resistant shield hob cutter according to claim 1, characterized in that: In the protrusion array, every two adjacent rows of protrusions and every two adjacent columns of protrusions are arranged alternately.

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