Wear-resistant hard alloy inserted tooth hob

Abstract

The utility model discloses a wear-resistant hard alloy inserted tooth hobbing cutter which comprises a hobbing cutter body, a mounting groove is formed in the hobbing cutter body, cutter teeth are embedded in the mounting groove, a mounting hole is formed in the hobbing cutter body, AI-Si-based PCM microcapsules are arranged in the mounting hole, and a sealing cover is arranged at the top end of the mounting hole. And an AI-Si-based phase change material (PCM) microcapsule is filled in the composite material, so that heat can be effectively absorbed and released. The Al-Si-based PCM microcapsules are arranged in the mounting holes, so that high temperature generated in the cutting process can be controlled, the problems of tool softening, aggravated abrasion and the like caused by overheating are reduced, the service life of the tool is prolonged, the sealing cover is arranged, the Al-Si-based PCM microcapsules can be firmly sealed in the mounting holes, the microcapsules are prevented from leaking or being influenced by the external environment, and the service life of the tool is prolonged. And the stability and the safety of the overall structure of the cutter are ensured.

Description

Technical Field

[0001] This utility model relates to the field of hobbing technology, and more specifically, to a wear-resistant carbide toothed hobbing cutter. Background Technology

[0002] As a key component of mining machinery and tunnel boring equipment, the cutting cutter endures high-intensity impact loads and severe wear during cutting operations in complex geological conditions. In mining and tunneling, the cutting cutter not only faces hard rock and complex geological structures but also various sudden geological changes, such as faults, fissures, and uneven strata. These factors cause the cutting cutter to withstand enormous impact and friction forces during operation, leading to rapid wear and damage.

[0003] However, existing hob teeth gradually wear down during prolonged cutting, and may even break off under severe impact. In extreme cases, the cutter body may also fracture due to the immense impact force, leading to the failure of the entire hob. Furthermore, the high temperatures generated by friction during prolonged continuous cutting are a serious problem. During high-speed rotation and cutting, the friction between the hob teeth and the rock generates a significant amount of heat. If this heat is not dissipated in time, the temperature of the teeth will rise sharply, causing the tooth material to soften. Softened teeth not only lose their original hardness and wear resistance but are also prone to chipping or even falling off. This situation not only severely affects the service life of the hob but also leads to a significant decrease in the overall machine efficiency.

[0004] No effective solutions have yet been proposed to address the problems in the relevant technologies. Utility Model Content

[0005] In view of the problems in the related technologies, this utility model proposes a wear-resistant carbide toothed hob to overcome the above-mentioned technical problems existing in the existing related technologies.

[0006] Therefore, the specific technical solution adopted by this utility model is as follows:

[0007] A wear-resistant carbide toothed hob includes a hob body, a mounting groove on the hob body, cutting teeth embedded in the mounting groove, a mounting hole on the hob body, an AI-Si based PCM microcapsule inside the mounting hole, and a sealing cap at the top of the mounting hole.

[0008] Furthermore, in order to seal the Al-Si based PCM microcapsules inside the mounting hole, the sealing cap is connected to the roller cutter body.

[0009] Furthermore, to ensure even force distribution on the blade and prevent it from falling off, the blade has 30 teeth.

[0010] Furthermore, to enhance the wear resistance of the cutter body, a wear-resistant layer is provided on the surface of the hob body.

[0011] Furthermore, in order to reduce the exposure of the cutter body, a fixing hole is provided on the outer side of the hob body, and a nail body is connected inside the fixing hole. The nail body is made of cemented carbide.

[0012] Furthermore, the blade teeth are mushroom-shaped.

[0013] Furthermore, the hob body is made of tungsten carbide-cobalt cemented carbide.

[0014] The beneficial effects of this utility model are as follows:

[0015] (1) By setting mounting holes inside the hob body and filling them with Al-Si-based phase change material (PCM) microcapsules, heat can be effectively absorbed and released. This helps control the high temperature generated during cutting, reducing problems such as tool softening and accelerated wear caused by overheating, thereby extending tool life. Furthermore, by setting a sealing cap, it is ensured that the Al-Si-based PCM microcapsules can be firmly sealed in the mounting holes, preventing microcapsule leakage or the influence of the external environment, thus ensuring the overall structural stability and safety of the tool.

[0016] (2) By adding a wear-resistant layer to the surface of the hob body, the wear resistance of the cutter body is significantly improved, the wear risk of the cutter body being directly exposed to the harsh working environment is reduced, and the service life of the cutter is further extended. In addition, by setting a fixing hole on the outside of the hob body and reinforcing it with nails made of cemented carbide, the exposed part of the cutter body is reduced, and the risk of the cutter body being subjected to wear and corrosion is reduced. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a front view of a wear-resistant carbide toothed hob according to an embodiment of the present utility model;

[0019] Figure 2 This is a top view of a wear-resistant carbide toothed hob according to an embodiment of the present utility model;

[0020] Figure 3 This is an installation diagram of a wear-resistant carbide toothed hob body according to an embodiment of the present utility model;

[0021] Figure 4 This is a structural diagram of the mounting hole for a wear-resistant carbide toothed hob according to an embodiment of the present utility model.

[0022] In the picture:

[0023] 1. Hob cutter body; 2. Mounting groove; 3. Cutting teeth; 4. Mounting hole; 5. Al-Si based PCM microcapsule; 6. Sealing cap; 7. Wear-resistant layer; 8. Fixing hole; 9. Nail body. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] According to an embodiment of the present invention, a wear-resistant carbide toothed hob is provided.

[0026] Example 1

[0027] like Figures 1-4As shown, the wear-resistant carbide-cobalt toothed hob according to an embodiment of this utility model includes a hob body 1, which serves as the basic frame of the entire hob, providing the necessary strength and hardness to withstand high stress and wear during the cutting process. The hob body 1 is made of tungsten carbide-cobalt cemented carbide, which has a high melting point and good thermal stability, enabling it to operate in high-temperature environments without softening or deformation. This ensures the hob maintains a highly efficient and stable working state during long-term continuous operation and effectively extends the tool's service life. The hob body 1 has a mounting groove 2 for fixing cutting teeth 3, ensuring that the cutting teeth 3 are firmly embedded in the body 1. The mounting groove 2 contains 30 cutting teeth 3, which are mushroom-shaped. The mushroom-shaped design not only increases the effective cutting area of ​​the tool but also improves the force distribution, helping to prevent the cutting teeth 3 from falling off and improving overall stability. The hob body 1 has mounting holes 4 for holding microcapsules. Mounting hole 4 is located on one side of mounting groove 2, and Al-Si based PCM microcapsules 5 are disposed inside mounting hole 4. The core of Al-Si based PCM microcapsules 5 is an Al-12Si alloy. This alloy has good thermal properties and phase transformation characteristics, and can absorb and release a large amount of heat within a certain temperature range, thereby effectively regulating the working temperature of the hob. The phase transformation temperature of Al-12Si alloy is moderate, and it can function within the normal operating temperature range of the hob, avoiding softening and wear of the cutting teeth 3 due to high temperature. To ensure the stability and temperature resistance of the microcapsules, its outer shell adopts a double-layer encapsulation technology. The inner layer is coated with a 50-nanometer-thick AlN (aluminum nitride) film by plasma deposition. AlN has excellent thermal conductivity and insulation properties, which can effectively conduct heat and protect the core material. The outer layer is coated with a 200-nanometer-thick ZrO2 (zirconia) film using sol-gel technology. ZrO2 has extremely high temperature resistance and chemical stability, and can maintain structural integrity in high-temperature environments, preventing the microcapsules from rupturing or failing under extreme conditions. This dual-layer encapsulation structure can withstand temperatures up to 1200℃ and effectively prevent the microcapsules from being affected by mechanical impact and chemical corrosion during the operation of the hobbing cutter. By embedding the Al-Si-based PCM microcapsules 5 into the mounting holes 4 of the hobbing cutter body 1, precise control of the hobbing cutter's operating temperature can be achieved, reducing thermal stress and thermal deformation, extending the tool's service life, and improving cutting efficiency and machining quality. By setting mounting holes 4 on the hobbing cutter body 1 and embedding Al-Si-based PCM microcapsules 5, and utilizing their unique phase change characteristics and dual-layer encapsulation structure, effective regulation and protection of the hobbing cutter's operating temperature are achieved, significantly improving the hobbing cutter's thermal management and impact resistance, and providing strong support for the efficient and stable operation of mining machinery and tunnel boring equipment.

[0028] like Figures 1-4As shown, a sealing cap 6 is provided at the top of the mounting hole 4 to seal the Al-Si based PCM microcapsules 5 inside the mounting hole 4. The sealing cap 6 is connected to the hobbing cutter body 1. The surface of the hobbing cutter body 1 is provided with a wear-resistant layer 7, which is produced by laser cladding. Laser cladding is a high-precision surface modification technology that uses a high-energy laser beam to instantly melt and rapidly solidify specific alloy powders, forming a dense, uniform, and well-bonded wear-resistant coating. This process not only significantly improves the surface hardness and wear resistance of the hobbing cutter body 1 but also maintains the original properties of the cutter material, avoiding deformation and cracking problems that may occur with traditional heat treatment processes. The outer side of the hobbing cutter body 1 is provided with fixing holes 8, which are used to increase the mechanical strength of the cutter body and effectively reduce the wear risk in the exposed areas of the cutter body. They not only serve a reinforcing function but also protect the cutter body from corrosion and other forms of damage.

[0029] To facilitate understanding of the above-mentioned technical solutions of this utility model, the working principle or operation method of this utility model in actual process will be described in detail below.

[0030] In summary, by utilizing the above-mentioned technical solution of this utility model, during the actual use of this hob, the hob surface can be cleaned, Al-Si based PCM microcapsules 5 can be added into the mounting hole 4, the sealing cap 6 can be fixed to the surface of the hob body 1, and a wear-resistant layer 7 can be added to the surface of the hob body 1 using laser cladding technology. Finally, the cutting teeth 3 need to be embedded in the mounting groove 2, and the nail body 9 needs to be installed on the hob body 1. The cutting teeth 3 are usually made of cemented carbide, which has extremely high hardness and wear resistance. When installing the cutting teeth 3, it is necessary to ensure that they fit tightly with the mounting groove 2, and fix them to the hob body 1 by welding or mechanical connection. The nail body 9 is connected to the hob body 1 through the fixing hole 8 to ensure that it will not loosen or fall off during operation. Through the above steps, the high performance and long service life of the hob can be ensured in actual use. It can not only effectively cope with high-intensity impact loads and severe wear under complex geological conditions, but also significantly improve the thermal management and impact resistance of the cutter head, providing strong support for the efficient and stable operation of mining machinery and tunnel boring equipment.

[0031] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A wear resistant cemented carbide tipped hob, characterized in that, It includes a hobbing cutter body (1), a mounting groove (2) on the hobbing cutter body (1), a cutting tooth (3) embedded inside the mounting groove (2), a mounting hole (4) on the hobbing cutter body (1), an Al-Si based PCM microcapsule (5) inside the mounting hole (4), and a sealing cap (6) at the top of the mounting hole (4).

2. A hard metal insert hob according to claim 1, characterized in that The sealing cap (6) is connected to the hob cutter body (1).

3. A cemented carbide insert hob according to claim 1, characterized in that The number of blade teeth (3) is 30.

4. The indexable hard metal insert hob according to claim 1, characterized in that The surface of the hobbing cutter body (1) is provided with a wear-resistant layer (7).

5. The indexable hard metal insert hob according to claim 1, characterized in that The hob body (1) has a fixing hole (8) on the outside, and a nail body (9) is connected inside the fixing hole (8). The nail body (9) is made of cemented carbide.

6. The indexable hard metal insert hob according to claim 1, characterized in that The blade teeth (3) are mushroom-shaped.

7. The indexable hard metal insert hob according to claim 1, characterized in that The hobbing cutter body (1) is made of tungsten carbide-cobalt cemented carbide.

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