The alloy cutter tooth can prevent the deflection of the alloy cutter tooth during the hard rock operation

Abstract

This utility model relates to an alloy cutting tooth that can prevent the alloy teeth of a hobbing cutter from deflecting during hard rock operations. It belongs to the technical field of alloy cutting teeth and includes a hobbing alloy tooth body. The bottom of the hobbing alloy tooth body is provided with an anti-rotation misalignment structure to prevent rotational displacement. The anti-rotation misalignment structure includes eight anti-rotation torque ridges fixedly connected to the lower surface of the hobbing alloy tooth body. This alloy cutting tooth, which prevents the hobbing alloy tooth from deflecting during hard rock operations, allows the hobbing alloy tooth body to penetrate deeply into the cutter head magazine by setting the anti-rotation torque ridges, effectively preventing the hobbing alloy tooth body from deflecting and misaligning. This effectively solves the problem of inefficient rock cutting due to cutter head edge misalignment, without increasing production costs. An insert groove is provided to facilitate the hot-pressing of the hobbing alloy tooth body into the cutter head magazine.

Description

Technical Field

[0001] This utility model relates to the field of alloy cutting tool technology, specifically an alloy cutting tool that can prevent the alloy teeth of a hobbing cutter from deflecting during hard rock operations. Background Technology

[0002] In tunnel boring machine (TBM) construction, alloy cutterheads are core components on the cutterhead that directly contact the tunnel face and bear the brunt of rock breaking. Their performance directly affects the tunneling efficiency, cutter life, and construction costs. Unlike alloy cutterheads used in gear manufacturing, alloy cutterheads for TBMs must adapt to extreme working conditions of high impact, high wear, and complex geology (hard rock, gravel, and alternating soft and hard strata), making their design and application significantly unique.

[0003] Chinese utility model patent CN215718489U discloses a tooth arrangement structure for an extremely hard rock hobbing cutter, relating to the field of hobbing cutters. The key technical features include a frustum-shaped cutter shell with multiple rings of axially arranged alloy teeth on its outer circumference. Two rings of alloy teeth at the larger end of the cutter shell form a large-end anti-wear tooth group, and two rings at the smaller end form a small-end anti-wear tooth group. This utility model improves the wear resistance of both ends, prevents premature wear of the alloy teeth at both ends from causing high temperatures due to rock wear on the shell, thus preventing aging and failure of the sealing ring and extending the service life of the hobbing cutter.

[0004] However, during the use of this utility model, in mining and TBM tunneling construction, situations often arise where ultra-hard rock operations are encountered. The carbide hobbing teeth are subjected to huge rotational torque, causing the alloy teeth to rotate and deviate within the cutterhead magazine. This results in misalignment of the cutterhead cutting edge, which cannot efficiently cut the rock, leading to low construction efficiency and causing significant problems for engineering construction. It cannot meet the usage requirements. Therefore, an alloy cutting tooth that can prevent the carbide hobbing teeth from deviating during hard rock operations is proposed to solve the problems mentioned above. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides an alloy cutter tooth that can prevent the alloy teeth of the hob from deflecting during hard rock operations. It has the advantage of preventing the alloy teeth of the hob from rotating and shifting within the cutter head magazine, thus solving the problem that when the carbide hob teeth are subjected to huge rotational torque, the alloy teeth rotate and shift within the cutter head magazine, causing the cutter head cutting edge to misalign and resulting in inefficient rock cutting, leading to low construction efficiency and significant problems in engineering construction.

[0006] To achieve the above objectives, the present invention provides the following technical solution: an alloy cutter tooth that can prevent the alloy cutter teeth from deflecting during hard rock operations, comprising an alloy cutter tooth body, wherein the bottom of the alloy cutter tooth body is provided with an anti-rotational deviation structure that can prevent it from rotating and deviating.

[0007] The anti-rotational misalignment structure includes eight anti-rotational torsion ridges fixedly connected to the lower surface of the hob alloy tooth body. The eight anti-rotational torsion ridges are evenly distributed on the lower surface of the hob alloy tooth body.

[0008] Furthermore, the cross-sectional shape of the anti-rotational torsion ridge is an isosceles trapezoid, and the length of each of the eight anti-rotational torsion ridges is 10mm.

[0009] Furthermore, an inlay groove is formed on the lower surface of the hobbing alloy tooth body, and the inlay groove is disposed between eight anti-rotational torsion ridges.

[0010] Furthermore, the hob alloy tooth body includes a hob alloy tooth substrate, and the outer surface of the hob alloy tooth substrate is provided with a high-strength structural layer that can improve the strength of the hob alloy tooth body in use.

[0011] Furthermore, the high-strength structural layer includes an anti-corrosion layer disposed on the outside of the hob alloy tooth substrate, an impact-resistant layer disposed on the side of the anti-corrosion layer away from the hob alloy tooth substrate, and a wear-resistant layer disposed on the side of the impact-resistant layer away from the anti-corrosion layer.

[0012] Furthermore, the thickness of the anti-corrosion layer is 20 μm, the thickness of the impact-resistant layer is 0.8 mm, and the thickness of the wear-resistant layer is 10 μm.

[0013] Compared with the prior art, this utility model provides an alloy cutting tooth that can prevent the alloy teeth of the hobbing cutter from deflecting during hard rock operations, and has the following beneficial effects:

[0014] 1. This alloy cutter tooth, which can prevent the hob alloy teeth from deflecting during hard rock operations, can be made to penetrate the hob alloy tooth body into the cutter head magazine by setting anti-rotation torque ridges, effectively preventing the hob alloy tooth body from deflecting and misaligning. This will better solve the problem of the cutter head cutting edge misalignment preventing efficient rock cutting, without increasing production costs. By setting an inlay groove, it is convenient to heat-press the hob alloy tooth body into the cutter head magazine.

[0015] 2. This alloy cutter tooth, designed to prevent deflection of the carbide teeth during hard rock operations, features an anti-corrosion layer that protects the base material in corrosive formations containing sulfates and chloride ions. An impact-resistant layer enhances the overall strength of the base material and provides cushioning, extending its service life. A wear-resistant layer improves the surface hardness and wear resistance, further prolonging its lifespan. This solution addresses the problem of carbide cutter teeth shifting within the cutter head magazine under immense rotational torque, leading to inefficient rock cutting and significant construction difficulties. Attached Figure Description

[0016] Figure 1 This is a cross-sectional view of the structure of this utility model;

[0017] Figure 2 This is a side view of the structure of this utility model;

[0018] Figure 3 This is a bottom view of the structure of this utility model;

[0019] Figure 4 This is a schematic diagram of the high-strength structural layer of this utility model.

[0020] In the figure: 1. Hob alloy tooth body; 101. Hob alloy tooth substrate; 102. Anti-corrosion layer; 103. Impact-resistant layer; 104. Wear-resistant layer; 2. Anti-rotational torsion ridge; 3. Insertion groove. Detailed Implementation

[0021] 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.

[0022] Please see Figures 1 to 3 This embodiment provides an alloy cutter tooth that can prevent the alloy cutter teeth from deflecting during hard rock operations. It includes a main body 1 of the alloy cutter tooth. The bottom of the main body 1 of the alloy cutter tooth is provided with an anti-rotation deviation structure that can prevent it from rotating. The anti-rotation deviation structure includes an anti-rotation torsion ridge 2 fixedly connected to the lower surface of the main body 1 of the alloy cutter tooth. There are eight anti-rotation torsion ridges 2, which are evenly distributed on the lower surface of the main body 1 of the alloy cutter tooth.

[0023] Specifically, the cross-sectional shape of the anti-rotational torsion rib 2 is an isosceles trapezoid, and the length of each of the eight anti-rotational torsion ribs 2 is 10mm. An inlay groove 3 is provided on the lower surface of the hob alloy tooth body 1, and the inlay groove 3 is located between the eight anti-rotational torsion ribs 2.

[0024] It should be noted that the anti-rotation torque ridges 2 are designed with eight evenly distributed ridges, which makes the hob alloy tooth body 1 more evenly stressed during operation, avoiding deflection deformation caused by excessive local stress. The isosceles trapezoidal cross-section shape, compared with other shapes such as rectangles, generates greater resistance on both sides when subjected to rotational force, further enhancing the anti-rotation effect. The 10mm length setting comprehensively considers the overall size of the hob alloy tooth body 1 and its compatibility with the installation location, ensuring sufficient anti-torsion performance without affecting installation and operation due to excessive length. The insert groove 3 is set between the eight anti-rotation torque ridges 2, which can precisely cooperate with the protrusion structure on the corresponding cutter head magazine to form a mechanical lock. Together with the anti-rotation torque ridges 2, it forms a double anti-rotation guarantee, greatly improving the stability of the structure.

[0025] Please see Figure 1 and Figure 4 In this embodiment, the hob alloy tooth body 1 includes a hob alloy tooth substrate 101. A high-strength structural layer capable of improving the strength of the hob alloy tooth body 1 is provided on the outside of the hob alloy tooth substrate 101. The high-strength structural layer includes an anti-corrosion layer 102 disposed on the outside of the hob alloy tooth substrate 101. An impact-resistant layer 103 is disposed on the side of the anti-corrosion layer 102 away from the hob alloy tooth substrate 101. A wear-resistant layer 104 is disposed on the side of the impact-resistant layer 103 away from the anti-corrosion layer 102.

[0026] Specifically, the thickness of the anti-corrosion layer 102 is 20 μm, the thickness of the impact-resistant layer 103 is 0.8 mm, and the thickness of the wear-resistant layer 104 is 10 μm.

[0027] It should be noted that the 20μm thickness of the anti-corrosion layer 102 effectively resists the erosion of corrosive media such as moisture and minerals that may be present in hard rock working environments, without adding excessive weight or cost. The 0.8mm thickness of the impact-resistant layer 103, while ensuring good impact absorption performance, effectively buffers the impact force when the hob alloy tooth body is subjected to severe impacts from hard rock, protecting the substrate from damage. If the thickness is too thin, the impact resistance will be poor; if it is too thick, it will affect the cutting performance of the hob. The 10μm thickness of the wear-resistant layer 104 significantly improves the wear resistance of the hob alloy tooth body 1 surface, extending its service life during hard rock cutting, without increasing surface brittleness due to excessive thickness, thus preventing peeling during operation. These three layers are tightly integrated and work synergistically to enhance the service strength of the hob alloy tooth body 1 from different angles.

[0028] The working principle of the above embodiments is as follows:

[0029] During hard rock cutting, when the hob alloy tooth body 1 contacts the hard rock and performs cutting operations, it is subjected to a reaction force from the hard rock, including a force in the rotational direction. At this time, the eight anti-rotational torsion ridges 2 at the bottom of the hob alloy tooth body 1 are in close contact with the cutter head magazine. Utilizing its isosceles trapezoidal structural characteristics, it can effectively resist the force in the rotational direction and prevent the hob alloy tooth body 1 from rotating and deviating. At the same time, the insert groove 3 and the protrusion structure on the cutter head magazine interlock, further enhancing the anti-rotation effect and forming a double protection. During the stress process, the high-strength structural layer on the outside of the hob alloy tooth body 1 plays an important role. The anti-corrosion layer 102 prevents external corrosive substances from eroding the hob alloy tooth substrate 101, the impact-resistant layer 103 buffers the force brought by the impact of the hard rock, reducing the damage to the substrate, and the wear-resistant layer 104 resists wear during the cutting process, protecting the surface structure of the hob alloy tooth body 1. Through the synergistic work of the anti-rotational deviation structure and the high-strength structural layer, the alloy cutter teeth can work stably in hard rock operations, effectively preventing the deflection of the hobbing alloy teeth 1, while improving their strength and service life.

[0030] The installation, connection, or setting methods disclosed in this embodiment are all common mechanical connection methods, and any method that can achieve its beneficial effects can be implemented.

[0031] It should be noted that the orientations or positional relationships indicated herein are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the purpose of facilitating the description of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0032] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0033] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An alloy cutting tool that can prevent the alloy teeth of a hobbing cutter from deflecting during hard rock operations, comprising a hobbing alloy tooth body (1), characterized in that: The bottom of the hob alloy tooth body (1) is provided with an anti-rotation misalignment structure that can prevent it from rotating and deviating. The anti-rotation misalignment structure includes an anti-rotation torque ridge (2) fixedly connected to the lower surface of the hob alloy tooth body (1). The number of the anti-rotation torque ridges (2) is eight, and the eight anti-rotation torque ridges (2) are evenly distributed on the lower surface of the hob alloy tooth body (1).

2. The alloy cutting tooth according to claim 1, which can prevent the alloy teeth of the hobbing cutter from deflecting during hard rock operations, is characterized in that: The cross-section of the anti-rotational torsion rib (2) is an isosceles trapezoid, and the length of each of the eight anti-rotational torsion ribs (2) is 10 mm.

3. The alloy cutting tooth according to claim 1, which can prevent the alloy teeth of the hobbing cutter from deflecting during hard rock operations, is characterized in that: The lower surface of the hobbing alloy tooth body (1) is provided with an inlay groove (3), which is located between eight anti-rotation torsion ridges (2).

4. The alloy cutting tooth according to claim 1, which can prevent the alloy teeth of the hobbing cutter from deflecting during hard rock operations, is characterized in that: The hob alloy tooth body (1) includes a hob alloy tooth substrate (101), and the hob alloy tooth substrate (101) is provided with a high-strength structural layer on the outside that can improve the strength of the hob alloy tooth body (1).

5. The alloy cutting tooth according to claim 4, which can prevent the alloy teeth of the hobbing cutter from deflecting during hard rock operations, is characterized in that: The high-strength structural layer includes an anti-corrosion layer (102) disposed on the outside of the hob alloy tooth substrate (101), an impact-resistant layer (103) disposed on the side of the anti-corrosion layer (102) away from the hob alloy tooth substrate (101), and a wear-resistant layer (104) disposed on the side of the impact-resistant layer (103) away from the anti-corrosion layer (102).

6. The alloy cutting tooth according to claim 5, which can prevent the alloy teeth of the hobbing cutter from deflecting during hard rock operations, is characterized in that: The thickness of the anti-corrosion layer (102) is 20 μm, the thickness of the impact-resistant layer (103) is 0.8 mm, and the thickness of the wear-resistant layer (104) is 10 μm.

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