Hobbing cutter

Abstract

The utility model provides a gear hobbing cutter which comprises a cutter ring, a gear hobbing cutter head, a gear hobbing cutter head, a gear hobbing cutter head and a gear hobbing cutter head, the cutter teeth are embedded in the embedding holes respectively, each cutter tooth is provided with a base body layer, a combination layer and a hard layer which are arranged in a stacked mode and combined in a hot isostatic pressing mode, the base body layers and the combination layers are located in the embedding holes, and part of the hard layers protrude out of the embedding holes. According to the hobbing cutter, the problems that the hobbing cutter teeth and the tooth holes are not stably connected, and the impact resistance is poor are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of shield machine equipment, in particular to a gear hobbing cutter. Background Art

[0002] The description in this section merely provides background information related to the disclosure of the present utility model and does not constitute prior art.

[0003] In the technical field of cutterhead equipment for tunnel boring machines, the toothed hob is the main tool for breaking the soil layer at the front face of the tunnel boring machine. Its hob teeth not only need to have high strength characteristics, but also need to have excellent wear resistance. Therefore, cemented carbide is usually used to make the hob teeth; however, in actual production and construction, the hob teeth are usually made of cemented carbide, and the cutter ring is usually made of ordinary steel, because the thermal expansion coefficient of cemented carbide material is only 1 / 3 to 1 / 2 of the thermal expansion coefficient of steel material. Therefore, when the cemented carbide cutter teeth are in the state of being embedded in the cutter ring, affected by the high temperature change environment generated by the construction, the fit tightness of the hob teeth and the cutter ring is poor, and it is easy to fall off, or cause the tooth fixing force of the cutter teeth to change frequently and be in a declining state, causing the cutter teeth to rotate, greatly reducing the rock breaking effect; further, the hob teeth made of cemented carbide are affected by the material characteristics, have high hardness but are fragile, and the entire cemented carbide cutter teeth are directly embedded in the tooth hole and are easy to break during the construction process of the hob, and their impact resistance is weak. At the same time, the hob teeth are made of cemented carbide. Under the wear caused by normal construction, the part of the hob teeth protruding from the cutter ring is worn, the cutter ring loses its crushing ability, and the cutter ring fails as a whole. At the same time, a large amount of cemented carbide embedded in the cutter ring is wasted and cannot be reused, resulting in a waste of resources.

[0004] It should be noted that the above introduction to the technical background is only for the convenience of providing a clear and complete description of the technical solutions of the utility model and for the convenience of understanding by those skilled in the art. It cannot be considered that the above technical solutions are well known to those skilled in the art simply because these solutions are described in the background technology section of the utility model. Utility Model Content

[0005] The utility model aims to provide a gear hobbing cutter, which solves the problems of unstable connection between the gear hobbing cutter teeth and gear holes and weak impact resistance.

[0006] The above-mentioned implementation purpose of the utility model is mainly achieved by the following technical solutions:

[0007] The utility model provides a gear hobbing cutter, comprising:

[0008] The knife ring has a plurality of embedded holes arranged at intervals along its circumference;

[0009] A plurality of blade teeth are respectively embedded in the embedding holes, and the blade teeth have a base layer, a bonding layer and a hard layer which are stacked and bonded by hot isostatic pressing. The base layer and the bonding layer are located in the embedding holes, and part of the hard layer protrudes out of the embedding holes.

[0010] In a specific embodiment, the surface of the base layer facing the bonding layer is concavely provided with a first groove structure, and the surface of the hard layer facing the bonding layer is concavely provided with a second groove structure, and the extension direction of the first groove structure and the extension direction of the second groove structure are arranged at a certain angle.

[0011] In a specific embodiment, the first groove structure has a plurality of first grooves arranged in parallel on the surface of the base layer, and the second groove structure has a plurality of second grooves arranged in parallel on the surface of the hard layer, and the extension direction of the plurality of first grooves is arranged perpendicular to the extension direction of the plurality of second grooves.

[0012] In a specific implementation, the thickness of the hard layer in the embedding hole is 3 mm to 8 mm, and the thickness of the hard layer protruding from the embedding hole is 3 mm to 5 mm.

[0013] In a specific embodiment, the bonding layer is a heat-melt-diffusible foil structure, and the thickness of the bonding layer is 0.05 mm to 0.3 mm.

[0014] In a specific embodiment, the bonding layer is made of a copper-based material, a nickel-based material or a copper-nickel alloy material.

[0015] In a specific embodiment, the roughness of the surface of the base layer facing the bonding layer and the roughness of the surface of the hard layer facing the bonding layer are both 1.25 μm to 5 μm.

[0016] In a specific embodiment, the material of the hard layer is tungsten-cobalt hard alloy.

[0017] In a specific embodiment, the material of the base layer is Q355 steel or 45 steel.

[0018] In a specific embodiment, the axis of the base layer, the axis of the bonding layer and the axis of the hard layer are collinearly arranged, and the circumferential diameters of the base layer, the bonding layer and the hard layer are the same.

[0019] Compared with the prior art, the technical solution described in the utility model has the following characteristics and advantages:

[0020] The gear hobbing cutter provided by the utility model improves the overall impact resistance of the cutter teeth by adopting the cutter teeth composed of a three-layer structure. When the cutter teeth are embedded in the embedding hole, the hard layer is only partially embedded in the embedding hole, which reduces the amount of material of the hard layer discarded after the cutter teeth are worn, which is beneficial to saving production costs. At the same time, by adopting the cutter teeth composed of a three-layer structure, the material of the base layer is replaced with the material consistent with the material of the cutter ring, which can avoid the problems of unstable loading of the cutter teeth and continuous decrease in the fixing force of the cutter teeth caused by the different expansion rates of the cutter teeth and the embedding hole, thereby achieving stable embedding. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a front view of the gear hobbing cutter of the utility model;

[0022] Figure 2 It is a cross-sectional view of the blade teeth of the utility model;

[0023] Figure 3 It is a cross-sectional view of the substrate layer of the utility model;

[0024] Figure 4 It is a diagram of the stacking of the first groove structure and the second groove structure of the utility model.

[0025] Description of Figure Numbers:

[0026] 1. Knife ring; 11. Embedded hole;

[0027] 2. blade teeth; 21. base layer; 211. first groove structure; 2111. first groove; 22. bonding layer; 23. hard layer; 231. second groove structure; 2311. second groove;

[0028] F, the extension direction of the first groove structure;

[0029] E, the extension direction of the second groove structure;

[0030] H, axis of the matrix layer;

[0031] I, the axis of the bonding layer;

[0032] J. Axis of the hard layer. DETAILED DESCRIPTION

[0033] In order to enable those skilled in the art to better understand the technical solutions in the present invention, the following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0034] It should be noted that when an element is referred to as being "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only embodiment.

[0035] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0036] like Figure 1 and Figure 2 As shown, the utility model provides a gear hobbing cutter, comprising:

[0037] The cutter ring 1 has a plurality of embedded holes 11 arranged at intervals along its circumference;

[0038] A plurality of blade teeth 2 are respectively embedded in each embedding hole 11. The blade teeth 2 include a base layer 21, a bonding layer 22 and a hard layer 23 which are stacked and bonded by hot isostatic pressing. The base layer 21 and the bonding layer 22 are located in the embedding hole 11, and part of the hard layer 23 protrudes from the embedding hole 11.

[0039] The gear hobbing cutter provided by the utility model improves the overall impact resistance of the cutter tooth 2 by adopting a cutter tooth 2 composed of a three-layer structure; further, when the cutter tooth 2 is embedded in the embedding hole 11, the hard layer 23 is only partially embedded in the embedding hole 11, which reduces the amount of material of the hard layer 23 discarded after the cutter tooth 2 is worn, which is beneficial to saving production costs and also improves the impact resistance of the hard layer 23 of the cutter tooth 2; at the same time, by adopting a cutter tooth 2 composed of a three-layer structure, the material of the base layer 21 is replaced with the material consistent with the material of the cutter ring 1, which can avoid the problems of unstable loading of the cutter tooth 2 and continuous decrease in the fixing force of the cutter tooth 2 caused by the different expansion rates of the cutter tooth 2 and the embedding hole 11, thereby achieving stable embedding.

[0040] Specifically in the present embodiment, the cutting ring 1 of the gear hobbing cutter is generally a disc-shaped structure, and in other embodiments it can also be set to other shapes, without specific limitation; the multiple embedded holes 11 in the present embodiment are arranged on the radial outer surface of the cutting ring 1 at intervals along the circumference of the cutting ring 1, and in other embodiments, the multiple embedded holes 11 can also be arranged on the two axial surfaces of the cutting ring 1, without specific limitation; the embedded holes 11 in the present embodiment are extended along the radial direction of the cutting ring 1, and in other embodiments, the extension direction of the embedded holes 11 can also be set at a certain angle to the radial direction of the cutting ring 1, without specific limitation. Furthermore, in the present embodiment, a plurality of blade teeth 2 are embedded in each embedding hole 11 by cold pressing, and the tolerance range between the blade teeth 2 and the embedding hole 11 is 3 to 10 threads. In other embodiments, the blade teeth 2 can also be embedded in the embedding hole 11 in other forms, and no specific limitation is made to this. In the present embodiment, the blade teeth 2 are a three-layer stacked structure, wherein the three-layer stacked structure is a base layer 21, a bonding layer 22 and a hard layer 23 stacked from bottom to top, wherein the hard layer 23 is made of a material with higher hardness, and the base layer 21 is made of a material consistent with or similar to the material of the knife ring 1 to avoid the problem of unstable connection after the blade teeth 2 are embedded due to inconsistent material expansion rates. The three-layer structure of the blade teeth 2 in the present embodiment is combined by hot isostatic pressing, wherein the insulation temperature is 1000°C to 1000°C, the insulation time is 1h to 3h, and the holding pressure is 120Mpa to 1 50Mpa; in the state where the cutter teeth 2 of the present embodiment are embedded in the embedding hole 11, the base layer 21 and the bonding layer 22 are embedded in the embedding hole 11, the lower part of the hard layer 23 is embedded in the embedding hole 11, and the upper part of the hard layer 23 protrudes from the embedding hole 11. In the circumferential direction of the cutter ring 1, the upper parts of the hard layers 23 of multiple cutter teeth 2 protrude from the embedding hole 11, and the heights of the cutter teeth 2 protruding from the embedding hole 11 are the same, so as to avoid the problem that the different heights of the cutter teeth 2 protruding from the embedding hole 11 lead to poor rock crushing effect; in other embodiments, the heights of the multiple cutter teeth 2 protruding from the embedding hole 11 can also be different (not shown in the drawings), for example, divided into a first height group and a second height group, wherein the height of the cutter teeth 2 protruding from the embedding hole 11 in the first height group is a first height, and the height of the cutter teeth 2 protruding from the embedding hole 11 in the second height group is a second height, and the first height and the second height can be different, and there is no specific limitation on this.

[0041] like Figure 3 and Figure 4 As shown, in a specific embodiment, a first groove structure 211 is recessed on the surface of the base layer 21 facing the bonding layer 22, and a second groove structure 231 is recessed on the surface of the hard layer 23 facing the bonding layer 22. The extension direction F of the first groove structure 211 and the extension direction E of the second groove structure 231 are arranged at a certain angle.

[0042] The gear hobbing cutter provided by the utility model provides a diffusion space for the bonding layer 22 during hot isostatic pressing by arranging a groove structure on the surface of the base layer 21 and the surface of the hard layer 23. Furthermore, the extension direction F of the first groove structure 211 and the extension direction E of the second groove structure 231 are arranged at a certain angle, which increases the diffusion space of the bonding layer 22, so that the base layer 21 and the hard layer 23 can be more stably combined. At the same time, the groove structure is arranged on the surface of the base layer 21 and the surface of the hard layer 23, which increases the bonding area of ​​the three-layer structure of the bonding layer 22, the base layer 21 and the hard layer 23 compared to the plane, so that the bonding is more stable, and a stable one-piece molding structure of the tooth 2 is achieved.

[0043] Specifically in the present embodiment, the first groove structure 211 formed on the surface of the base layer 21 facing the bonding layer 22 is generally a plurality of inwardly recessed grooves, and the extension directions of the plurality of grooves are parallel to each other. Conversely, the second groove structure 231 formed on the surface of the hard layer 23 facing the bonding layer 22 is also a plurality of inwardly recessed grooves, and the extension directions of the plurality of grooves are parallel to each other. In other embodiments, the extension directions of the plurality of grooves of the first groove structure 211 may not be parallel to each other, and the extension directions of the plurality of grooves of the second groove structure 231 may also not be parallel to each other, but the extension directions of the plurality of grooves of the first groove structure 211 and the extension directions of the plurality of grooves of the second groove structure 231 are arranged at a certain angle to provide sufficient diffusion space for the bonding layer 22; in another embodiment, the extension directions of the plurality of grooves of the first groove structure 211 and the extension directions of the plurality of grooves of the second groove structure 231 may also be the same, and no specific limitation is made to this. In this embodiment, the base layer 21, the bonding layer 22 and the hard layer 23 are stacked from bottom to top, so the surface of the base layer 21 facing the bonding layer 22 is the upper surface of the base layer 21, and the surface of the hard layer 23 facing the bonding layer 22 is the lower surface of the hard layer 23. In this embodiment, the recessed depths of the multiple grooves of the first groove structure 211 are the same, and the recessed depths of the multiple grooves of the second groove structure 231 are also set the same. In another embodiment, the recessed depths of the multiple grooves of the first groove structure 211 are set the same as the recessed depths of the multiple grooves of the second groove structure 231; in another embodiment, the recessed depths of the multiple grooves of the first groove structure 211 are set differently, and the recessed depths of the multiple grooves of the second groove structure 231 are also set differently, and no specific restrictions are made to this; the first groove structure 211 and the second groove structure 231 of this embodiment are generated by rubbing the surfaces of the base layer 21 and the hard layer 23 with sandpaper, and in other embodiments, they can also be generated by other means, and no specific restrictions are made to this.

[0044] like Figure 3 and Figure 4As shown, in a specific embodiment, the first groove structure 211 has a plurality of first grooves 2111 arranged parallel to the surface of the base layer 21, and the second groove structure 231 has a plurality of second grooves 2311 arranged parallel to the surface of the hard layer 23, and the extension direction of the plurality of first grooves 2111 is arranged perpendicular to the extension direction of the plurality of second grooves 2311.

[0045] The blade tooth 2 provided by the utility model provides a larger diffusion space for the bonding layer 22 by setting a plurality of first grooves 2111 and a plurality of second grooves 2311. The plurality of first grooves 2111 and the plurality of second grooves 2311 are set in parallel, so that the bonding stress provided by the bonding layer 22 can be evenly distributed on the surface of the base layer 21 and the surface of the hard layer 23, thereby improving the impact resistance of the blade tooth 2 and avoiding problems such as structural deformation of the blade tooth 2 when subjected to impact; further, the extension direction of the plurality of first grooves 2111 is perpendicular to the extension direction of the plurality of second grooves 2311, so as to provide a stable stress frame of the bonding layer 22 after hot isostatic pressing and realize a better supporting structure.

[0046] Specifically, in this embodiment, the surface of the hard layer 23 facing the bonding layer 22 and the surface of the base layer 21 facing the bonding layer 22 are polished back and forth in one direction using sandpaper with mesh sizes of 20 to 100, and after polishing, the hard layer 23 and the base layer 21 are placed in an alcohol solution for ultrasonic cleaning for 5 to 10 minutes, so that a plurality of second grooves 2311 are formed on the surface of the hard layer 23 facing the bonding layer 22, and a plurality of first grooves 2111 are formed on the surface of the base layer 21 facing the bonding layer 22, the plurality of first grooves 2111 are arranged parallel to each other, and the plurality of second grooves 2311 are arranged parallel to each other. In this embodiment, the extension direction of the plurality of first grooves 2111 is perpendicular to the extension direction of the plurality of second grooves 2311.

[0047] like Figure 1 As shown, in a specific embodiment, the thickness of the hard layer 23 in the embedding hole 11 is 3 mm to 8 mm, and the thickness of the hard layer 23 protruding from the embedding hole 11 is 3 mm to 5 mm.

[0048] The gear hobbing cutter provided by the utility model can improve the shear strength of the cutter teeth 2 by limiting the thickness of the hard layer 23 embedded in the embedding hole 11, avoid the problems of too high production cost of the cutter teeth 2 caused by the hard layer 23 embedded in the embedding hole 11 being too thick, poor installation tightness caused by the different expansion rate of the hard layer 23 and the expansion rate of the cutter ring 1, or avoid the problem of too low shear strength of the cutter teeth 2 caused by the hard layer 23 embedded in the embedding hole 11 being too thin, thereby failing to achieve a stable rock breaking effect; at the same time, by limiting the thickness of the hard layer 23 protruding from the embedding hole 11, it can be avoided that the shear strength of the cutter teeth 2 is too low due to the thickness of the hard layer 23 protruding from the embedding hole 11 is too thick. Specifically in the present embodiment, the thickness of the hard layer 23 is limited to a range of 6 mm to 13 mm. In the present embodiment, the thickness of the hard layer 23 in the embedding hole 11 is 4 mm, and the thickness of the hard layer 23 protruding from the embedding hole 11 is 3 mm. In other embodiments, the thickness of the hard layer 23 in the embedding hole 11 and the thickness of the hard layer 23 protruding from the embedding hole 11 may also be selected to be other thicknesses, and no specific limitation is made to this.

[0049] like Figure 2 As shown, in a specific embodiment, the bonding layer 22 is a foil structure that can be heat-melted and diffused, and the thickness of the bonding layer 22 is 0.05 mm to 0.3 mm.

[0050] The gear hobbing cutter provided by the utility model avoids the problem of loose connection between the base layer 21 and the hard layer 23 due to the thin thickness of the bonding layer 22 by limiting the thickness of the bonding layer 22. It also avoids the problem of different thicknesses of the bonding layer 22 at different bonding positions of the base layer 21 and the hard layer 23 due to different diffusion speeds of the bonding layer 22 caused by the thick thickness of the bonding layer 22. At the same time, it also saves the material consumption of the bonding layer 22. Specifically in this embodiment, the material used for the bonding layer 22 is a material that can produce a hot melt diffusion state under high temperature, and the material of the bonding layer 22 can provide a tight connection effect of heat welding under high temperature and high pressure environment. The thickness of this embodiment is the thickness of the bonding layer 22 before hot isostatic pressing.

[0051] In a specific embodiment, the bonding layer 22 is made of a copper-based material, a nickel-based material or a copper-nickel alloy material.

[0052] The gear hobbing cutter provided by the utility model can provide a better bonding effect after the three-layer structure is bonded by hot isostatic pressing by using a copper-based material, a nickel-based material or a copper-nickel alloy material as the material of the bonding layer 22, effectively improving the bonding strength between the hard layer 23 and the base layer 21, and improving the impact resistance of the cutter teeth 2. Specifically in this embodiment, the bonding layer 22 is a pure nickel foil, and in other embodiments, the bonding layer 22 can also be a foil with a copper content of 50% and a nickel content of 50%; in another embodiment, the bonding layer 22 can also be a foil with a copper content of 90%, a manganese content of 9% and a cobalt content of 1%, and there is no limitation on the specific material of the bonding layer 22.

[0053] like Figure 3 As shown, in a specific embodiment, the roughness of the surface of the base layer 21 facing the bonding layer 22 and the roughness of the surface of the hard layer 23 facing the bonding layer 22 are both 1.25 μm to 5 μm.

[0054] The gear hobbing cutter provided by the utility model limits the roughness of the surface of the base layer 21 facing the bonding layer 22 and the roughness of the surface of the hard layer 23 facing the bonding layer 22, so as to avoid the problem that the bonding layer 22 after melting and diffusion cannot stay stably between the base layer 21 and the hard layer 23 due to too small roughness, and can also avoid the problem that the bonding layer 22 after melting cannot achieve stable and uniform diffusion between the base layer 21 and the hard layer 23 due to too large roughness, which also causes the problem of uneven connection between the base layer 21 and the hard layer 23. Specifically in the present embodiment, the roughness of the surface of the base layer 21 facing the bonding layer 22 is determined by the density and spacing of the multiple first grooves 2111 on the surface of the base layer 21 facing the bonding layer 22, and the roughness of the surface of the hard layer 23 facing the bonding layer 22 is determined by the density and spacing of the multiple second grooves 2311 on the surface of the hard layer 23 facing the bonding layer 22; in the present embodiment, the roughness of the surface of the base layer 21 facing the bonding layer 22 is 2.5 μm, and the roughness of the surface of the hard layer 23 facing the bonding layer 22 is 2.5 μm. In other embodiments, the roughness of the surface of the base layer 21 facing the bonding layer 22 and the roughness of the surface of the hard layer 23 facing the bonding layer 22 may also be different, and there is no specific limitation on this.

[0055] In a specific embodiment, the material of the hard layer 23 is tungsten-cobalt hard alloy.

[0056] The gear hobbing cutter provided by the utility model can improve the rock breaking effect of the hard layer 23 and the wear resistance of the hard layer 23 by limiting the material of the hard layer 23; specifically, in the present embodiment, the material used for the hard layer 23 is cemented carbide YG16, and in other embodiments, the hard layer 23 can also be made of other tungsten-cobalt cemented carbides, without specific limitation.

[0057] In a specific embodiment, the material of the base layer 21 is Q355 steel or 45 steel.

[0058] The gear hobbing cutter provided by the utility model can improve the impact resistance of the base layer 21 and the shear resistance of the cutter teeth 2 by limiting the material of the base layer 21. At the same time, the material used in the base layer 21 and the material used in the hard layer 23 in this embodiment are the same material, so that the expansion rate of the two materials is the same, and the loose connection caused by the temperature rise during construction after the cutter teeth 2 are cold-pressed and embedded into the embedding hole 11 is avoided. Specifically in this embodiment, the material of the base layer 21 is Q355 steel, and the material of the cutter ring 1 is also Q355 steel; in other embodiments, the material of the base layer 21 and the material of the cutter ring 1 can also be 45 steel; in another other embodiment, the material of the base layer 21 is Q355 steel, and the material of the cutter ring 1 is also 45 steel, and no specific limitation is made to this.

[0059] like Figure 2 As shown, in a specific embodiment, the axis H of the base layer 21, the axis I of the bonding layer 22 and the axis J of the hard layer 23 are collinearly arranged, and the circumferential diameters of the base layer 21, the bonding layer 22 and the hard layer 23 are the same.

[0060] The gear hobbing cutter provided by the utility model can avoid the problem of unstable structural integrity of the tooth 2 due to the stress offset caused by the dispersion of the axes of the base layer 21, the bonding layer 22 and the hard layer 23 after hot isostatic pressing by limiting the colinear arrangement of the axis H of the base layer 21, the bonding layer 22 and the hard layer 23; further, the circumferential diameters of the base layer 21, the bonding layer 22 and the hard layer 23 are the same, which can avoid that after the base layer 21, the bonding layer 22 and the hard layer 23 are hot isostatically pressed, the finished tooth 2 can be formed without further cutting, and the tooth 2 is prevented from generating unbalanced stress on the bonding part of the tooth 2 during further cutting, thereby affecting the integral connection strength of the tooth 2. Specifically in the present embodiment, the base layer 21, the bonding layer 22 and the hard layer 23 are all cylindrical structures. In other embodiments, there is no restriction on the shapes of the base layer 21, the bonding layer 22 and the hard layer 23. In this embodiment, the axis H of the base layer 21, the axis I of the bonding layer 22 and the axis J of the hard layer 23 are arranged collinearly, that is, the tooth 2 as a whole is a cylindrical structure. In other embodiments, the hard layer 23 can also be a centrally symmetrical conical structure, and there is no specific limitation on this.

[0061] The specific embodiments described above further illustrate the purpose, technical solutions and beneficial effects of the utility model in detail. It should be understood that the above description is only a specific embodiment of the utility model and is not intended to limit the scope of protection of the utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the scope of protection of the utility model.

Claims

1. A gear hobbing cutter, characterized in that: include: The knife ring (1) has a plurality of embedded holes (11) arranged at intervals along its circumference; A plurality of blade teeth (2) are respectively embedded in the embedding holes (11); the blade teeth (2) comprise a base layer (21), a bonding layer (22) and a hard layer (23) which are stacked and bonded by hot isostatic pressing; the base layer (21) and the bonding layer (22) are located in the embedding holes (11); a portion of the hard layer (23) protrudes out of the embedding holes (11); a first groove structure (211) is recessed on the surface of the base layer (21) facing the bonding layer (22); a second groove structure (231) is recessed on the surface of the hard layer (23) facing the bonding layer (22); and an extension direction (F) of the first groove structure and an extension direction (E) of the second groove structure are arranged at a certain angle.

2. The gear hobbing cutter according to claim 1, characterized in that: The first groove structure (211) comprises a plurality of first grooves (2111) arranged in parallel on the surface of the base layer (21), and the second groove structure (231) comprises a plurality of second grooves (2311) arranged in parallel on the surface of the hard layer (23), and the extension direction of the plurality of first grooves (2111) is arranged perpendicular to the extension direction of the plurality of second grooves (2311).

3. The gear hobbing cutter according to claim 1 or 2, characterized in that: The thickness of the hard layer (23) located in the embedding hole (11) is 3 mm to 8 mm, and the thickness of the hard layer (23) protruding from the embedding hole (11) is 3 mm to 5 mm.

4. The gear hobbing cutter according to claim 1, characterized in that: The bonding layer (22) is a foil structure capable of thermal melting and diffusion, and the thickness of the bonding layer (22) is 0.05 mm to 0.3 mm.

5. The gear hobbing cutter according to claim 4, characterized in that: The material of the bonding layer (22) is a copper-based material, a nickel-based material or a copper-nickel alloy material.

6. The gear hobbing cutter according to claim 4 or 5, characterized in that: The roughness of the surface of the base layer (21) facing the bonding layer (22) and the roughness of the surface of the hard layer (23) facing the bonding layer (22) are both 1.25 μm to 5 μm.

7. The gear hobbing cutter according to claim 1, characterized in that: The material of the hard layer (23) is tungsten-cobalt hard alloy.

8. The gear hobbing cutter according to claim 1, characterized in that: The material of the base layer (21) is Q355 steel or 45 steel.

9. The gear hobbing cutter according to any one of claims 1 or 2, characterized in that: The axis (H) of the base layer, the axis (I) of the bonding layer and the axis (J) of the hard layer are arranged in a colinear manner, and the circumferential diameters of the base layer (21), the bonding layer (22) and the hard layer (23) are the same.

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