Surface-mounted high-wear-resistance inserted tooth hob

Abstract

The utility model relates to a patch type high-wear-resistance inserted tooth hob which comprises a hob ring base body, alloy teeth and alloy patches, the hob ring base body is a circular ring body, a plurality of alloy teeth are evenly arranged on the outer ring face of the hob ring base body, and the outer ring face and two end faces of the hob ring base body are in J-shaped smooth transition to form transition inclined faces. A plurality of alloy patches are uniformly arranged on the transition inclined surface in the circumferential direction, each alloy patch comprises a patch body and a plurality of disturbance protrusions arranged on the patch body, the disturbance protrusions are arranged on one surface of the patch body in an array mode, and the disturbance protrusions protrude out of the transition inclined surface outwards. The alloy patches are evenly arranged on the two side faces of the cutter ring base body, the abrasion resistance of the hob can be improved, the service life of the hob is effectively prolonged, and the problems that in the prior art, an inserted tooth hob is insufficient in abrasion resistance, and starting of a soft rock stratum is difficult are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of shield machine hob, in particular to a patch type high wear-resistant inserted tooth hob. Background Technique

[0002] The hob is the main component for shield / TBM to break rocks, and the service life of the hob affects the construction efficiency of shield / TBM. Currently, the main types of cutters are alloy cutters and disc cutters, and the disc cutter is the main tunneling cutter. In recent years, with the increase of tunnels, the complex geological conditions have put forward higher requirements for the life of the cutters. Therefore, relevant research on the inserted tooth cutter ring for shield machine disc cutters has emerged.

[0003] For example, an inserted tooth cutter ring for a shield hob with the application number 202221557400.9 evenly installs hard alloy long teeth and hard alloy short teeth on the circumferential direction of the cutter ring matrix. Another example is an inserted tooth cutter ring for hard rock strata with the application number 202123238869.4, where a number of alloy teeth are densely arranged on the circumferential direction of the cutter ring matrix, and wear-resistant layers are arranged on the inclined surfaces on both sides of the cutter ring matrix. And a high toughness and wear-resistant inserted tooth hob cutter ring for shield machine and its preparation method with the application number 202111392757.6 arranges a number of cutter teeth on the cutter ring matrix through metallurgical bonding.

[0004] It can be seen from this that the current research mostly focuses on the alloy teeth of the inserted tooth cutter ring, ignoring the importance of the wear resistance of the side surface of the cutter ring, resulting in serious wear on the side surface of the cutter ring. For some cutter rings, the side surface mostly uses a wear-resistant layer as a protective layer to improve the wear resistance, but the wear resistance improvement effect is far from that of hard alloy. At the same time, the surface of the wear-resistant layer is relatively smooth, and the starting assistance effect on the cutter ring in soft rock strata is small. Therefore, it is very necessary to design a hard alloy enhanced inserted tooth cutter ring. Summary of the Invention

[0005] In order to solve the problems of insufficient wear resistance of the existing inserted tooth hob and difficult starting in soft rock strata, the utility model provides a patch type high wear-resistant inserted tooth hob, which arranges alloy teeth on the outer ring surface of the cutter ring matrix, and at the same time arranges alloy patches on the end surface of the cutter ring matrix, realizing a substantial improvement in the wear resistance of the inserted tooth cutter ring, reducing the wear during the operation of the cutter ring, and improving the rock breaking ability of the hob and the starting ability in soft soil strata.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A patch type high wear-resistant inserted tooth hob includes a cutter ring matrix, alloy teeth and alloy patches. The cutter ring matrix is a circular ring body, and a number of the alloy teeth are evenly arranged on the outer ring surface of the cutter ring matrix to improve the rock breaking ability of the hob. A smooth transition in a "丿" shape is formed between the outer ring surface and the two end surfaces of the cutter ring matrix to form a transition inclined surface;

[0008] The transition slope is provided with a plurality of alloy patches in the circumferential direction to improve the wear resistance of the side of the cutter ring. The alloy patches include a sheet body and a disturbance protrusion provided on the sheet body. There are multiple disturbance protrusions, and the multiple disturbance protrusions are arranged in an array on a surface of the sheet body. The disturbance protrusions protrude outward from the transition slope, which improves the wear resistance of the cutter ring substrate and increases the friction between the cutter ring and the rock and soil, thereby facilitating the start-up and operation of the roller.

[0009] Furthermore, a plurality of tooth grooves are evenly provided on the outer ring surface of the cutter ring base to facilitate the embedding and installation of the alloy teeth. The tooth grooves extend radially inward along the cutter ring base, and the alloy teeth are arranged in the tooth grooves. The alloy teeth and the tooth grooves are interference fit to ensure the reliability of the installation of the alloy teeth.

[0010] Furthermore, the upper end of the alloy tooth extends a tooth groove upward and protrudes from the outer ring surface of the cutter ring base, and the upper end of the alloy tooth is a straight-line flat-mouth structure.

[0011] Furthermore, the transition slopes at both ends of the knife ring base are symmetrically arranged in an "eight" shape, and the thickness of the outer ring surface of the knife ring base is narrow, while the thickness of the inner ring surface is wide.

[0012] Furthermore, the transition slope is evenly provided with sheet grooves in the circumferential direction to facilitate the installation of the alloy patch. The sheet groove is close to the outer ring surface of the knife ring base, and the alloy patch is arranged in the sheet groove. The sheet body and the sheet groove of the alloy patch are brazed and fixed; the sheet body and the disturbance protrusion are integrally formed to ensure structural strength, and the disturbance protrusion is arranged outside the sheet groove, and the disturbance protrusion is in the shape of a prism, which is convenient for increasing the contact area with the rock and soil.

[0013] Through the above technical solution, the beneficial effects of the utility model are:

[0014] The utility model has a reasonable structural design. The alloy teeth and the cutter ring base adopt an interference fit, which realizes the fixed installation of the alloy teeth. The alloy teeth facilitate the rock breaking of the hob, and at the same time replace the cutter ring base to play a wear-resistant role, increase the wear resistance of the cutter ring cutting edge, and the cutting edge is not easy to wear. The alloy patch and the cutter ring base are connected and fixed by brazing. The high wear resistance of the hard alloy of the alloy patch itself improves the wear resistance of the side of the cutter ring base, reduces the wear rate, and in soft rock formations, the life of the cutter ring base is further improved. The structural design of the alloy patch increases the friction between the cutter ring base and the rock and soil, making the cutter ring base easier to start in soft soil formations. Thereby, the wear resistance of the cutter ring of the toothed hob and the starting ability in soft soil formations can be greatly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a front view of a patch-type high-wear-resistant inlaid tooth hob of the utility model.

[0016] Figure 2 The utility model is a patch type high wear-resistant inlaid tooth hob Figure 1 Enlarged schematic diagram of the alloy patch at point A in the middle.

[0017] Figure 3 It is a side view of a patch-type high-wear-resistant inlaid tooth hob of the utility model.

[0018] Figure 4 The utility model is a patch type high wear-resistant inlaid tooth hob Figure 1 Enlarged schematic diagram of the alloy patch at point B in the middle.

[0019] Figure 5 It is a partial cross-sectional view of a patch-type high-wear-resistant inlaid tooth hob of the utility model.

[0020] The numbers in the accompanying drawings are: 1 cutter ring substrate, 2 alloy teeth, 3 alloy patch, 31 sheet body, 32 disturbance protrusion, 4 tooth groove, 5 transition slope, 6 sheet groove. DETAILED DESCRIPTION

[0021] The specific implementation of the utility model is described in detail below with reference to the accompanying drawings:

[0022] like Figure 1~Figure 5 As shown, a patch-type high-wear-resistant inlaid tooth hob includes a cutter ring base 1, alloy teeth 2 and alloy patches 3. The alloy teeth 2 and alloy patches 3 are arranged at different positions of the cutter ring base 1. The alloy teeth 2 are used to improve the rock breaking ability of the hob, and the alloy patches 3 are used to improve the wear resistance of the side of the cutter ring base 1, thereby extending the service life of the hob.

[0023] The cutter ring base 1 is a circular ring body, and a plurality of alloy teeth 2 are evenly arranged on the outer ring surface of the cutter ring base 1. The alloy teeth 2 mainly increase the wear resistance of the cutting edge of the cutter ring base 1. The alloy teeth 2 are cylindrical bodies made of cemented carbide. When the alloy teeth 2 are installed, a plurality of tooth grooves 4 are evenly opened on the outer ring surface of the cutter ring base 1. The tooth grooves 4 are cylindrical groove structures, and the tooth grooves 4 extend radially inward along the cutter ring base 1, that is, extend toward the center of the cutter ring base 1.

[0024] The alloy tooth 2 is arranged in the tooth groove 4, and the alloy tooth 2 and the tooth groove 4 are interference fit, so as to fix the alloy tooth 2. After the alloy tooth 2 is installed, the upper end of the alloy tooth 2 extends upward from the tooth groove 4 and protrudes from the outer ring surface of the cutter ring base 1, so that the length of the alloy tooth 2 is greater than the length of the tooth groove 4, and the upper end of the alloy tooth 2 is a straight flat structure.

[0025] The outer ring surface and the two end surfaces of the cutter ring base body 1 are smoothly transitioned in a "丿" shape to form a transition inclined surface 5. The number of the transition inclined surfaces 5 is two, and they are located at both ends of the cutter ring base body 1. Therefore, the transition inclined surfaces 5 at both ends of the cutter ring base body 1 are symmetrically arranged in a "八" shape. Under the action of the transition inclined surface 5, the thickness of the outer ring surface of the cutter ring base body 1 is narrow, and the thickness of the inner ring surface is wide.

[0026] A number of alloy patches 3 are circumferentially arranged on the transition inclined surface 5. When the alloy patches 3 are installed, a number of chip grooves 6 are evenly opened in the circumferential direction of the transition inclined surface 5. The chip grooves 6 are rectangular groove structures, and the chip grooves 6 are used to accommodate the alloy patches 3. The chip grooves 6 are close to the outer ring surface of the cutter ring base body 1, that is, the chip grooves 6 are located at the outer edge position of the entire cutter ring base body 1, and the alloy patches 3 are arranged in the chip grooves 6.

[0027] The alloy patch 3 is a plate structure made of cemented carbide. The alloy patch 3 includes a patch body 31 and a disturbance protrusion 32 arranged on the patch body 31. The patch body 31 and the disturbance protrusion 32 are integrally formed. The patch body 31 of the alloy patch 3 is embedded into the chip groove 6 and is brazed and fixed with the chip groove 6. The disturbance protrusions 32 are arranged outside the chip groove 6. The number of the disturbance protrusions 32 is multiple, and the multiple disturbance protrusions 32 are arranged in a rectangular array on one outer surface of the patch body 31. The disturbance protrusions 32 protrude outward from the transition inclined surface 5, and the disturbance protrusions 32 are in the shape of a frustum of a pyramid.

[0028] When the utility model is manufactured: the chip grooves 6 are machined on the cutter ring base body 1, the brazing filler metal is evenly applied in the chip grooves 6, the alloy patches 3 are installed in the chip grooves 6 one by one, and induction brazing is carried out after installation. After brazing, the cutter ring base body 1 and the alloy patches 3 are put into a heat preservation box for slow cooling. After the temperature drop is completed, the cutter ring base body 1 is heat treated, and the heat treatment temperature is 700-800 °C. Then, alloy grooves are drilled on the cutting edge of the cutter ring base body 1, and the alloy teeth 2 are installed in the alloy grooves one by one, that is, the alloy teeth 2 can be pressed into the cutter ring base body 1 by a press to complete the production.

[0029] In the utility model, the main function of the cutter ring base body 1 is to combine the alloy teeth 2 and the alloy patches 3 and is used to install the alloy patches 3 and the alloy teeth 2. After the alloy teeth 2 and the alloy patches 3 are installed, the cutter ring base body 1 is assembled with the hob again. The function of the alloy teeth 2 is: rock breaking and acting as a wear-resistant part instead of the cutter ring base body 1.

[0030] The function of the alloy patch 3 is: when the penetration degree of the shield tunneling is large and the side surface of the cutter ring base body 1 is severely worn, the alloy patch 3 can resist abrasive wear by virtue of its high hardness and high wear resistance, and increase the service life of the cutter ring base body 1. At the same time, in low-strength strata, the difficult start of the hob is also a difficult point in tunneling. The alloy patch 3 can also increase the friction force between the cutter ring base body 1 and the rock and soil, making the hob start more easily. Moreover, the alloy patch 3 with the disturbance protrusions 32 can not only increase the flow of the muck but also increase the disturbance of the muck, avoiding the situation of uneven wear.

[0031] The embodiments described above are only preferred embodiments of the present invention and are not intended to limit the scope of implementation of the present invention. Therefore, any equivalent changes or modifications made based on the structures, features and principles described in the patent scope of the present invention should be included in the patent application scope of the present invention.

Claims

1. A patch-type high wear-resistant insert tooth hob, characterized in that: It includes a cutter ring matrix (1), alloy teeth (2) and alloy patches (3). The cutter ring matrix (1) is an annular body. A number of the alloy teeth (2) are evenly arranged on the outer ring surface of the cutter ring matrix (1). A smooth transition in a "丿" shape is formed between the outer ring surface and both end surfaces of the cutter ring matrix (1) to form a transition inclined surface (5). A number of the alloy patches (3) are circumferentially and evenly arranged on the transition inclined surface (5). The alloy patch (3) includes a sheet body (31) and a disturbance protrusion (32) arranged on the sheet body (31). The number of the disturbance protrusions (32) is multiple, and the multiple disturbance protrusions (32) are arranged in an array on one surface of the sheet body (31). The disturbance protrusion (32) protrudes outward from the transition inclined surface (5).

2. The high wear-resistant insert hob according to claim 1, characterized in that: A number of tooth grooves (4) are evenly formed on the outer ring surface of the cutter ring matrix (1). The tooth grooves (4) extend radially inwards along the cutter ring matrix (1). The alloy teeth (2) are arranged in the tooth grooves (4), and the alloy teeth (2) and the tooth grooves (4) are in interference fit.

3. A patch-type high wear-resistant insert hob according to claim 2, characterized in that: The upper end of the alloy tooth (2) extends upwards out of the tooth groove (4) and protrudes from the outer ring surface of the cutter ring matrix (1). The upper end of the alloy tooth (2) is a flat structure with a straight edge.

4. The high wear-resistant insert tooth hob according to claim 1, characterized in that: The transition inclined surfaces (5) at both ends of the cutter ring matrix (1) are symmetrically arranged in a "八" shape. The thickness of the outer ring surface of the cutter ring matrix (1) is narrow, and the thickness of the inner ring surface is wide.

5. The high wear-resistant insert hob according to claim 1, characterized in that: Sheet grooves (6) are circumferentially and evenly formed on the transition inclined surface (5). The sheet grooves (6) are close to the outer ring surface of the cutter ring matrix (1). The alloy patches (3) are arranged in the sheet grooves (6), and the sheet body (31) of the alloy patch (3) and the sheet grooves (6) are fixed by brazing; the sheet body (31) and the disturbance protrusion (32) are integrally formed, and the disturbance protrusion (32) is arranged outside the sheet grooves (6), and the disturbance protrusion (32) is in the shape of a frustum of a pyramid.

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