Shield tunneling machine cutter body based on wear-resistant alloy material

Abstract

The utility model discloses a shield tunneling machine cutter body based on wear-resistant alloy materials, and belongs to the technical field of shield tunneling machine cutters. The shield tunneling machine cutter body based on the wear-resistant alloy material comprises a cutter ring and a cutter hub, a cutter shaft is inserted in the center of a cutter in a penetrating mode, the cutter ring is in interference fit with the cutter hub, first wear-resistant welding is welded to the outer surface of the cutter ring, third wear-resistant welding is welded to the end face of the cutter hub, and a base body part, a first wear-resistant layer and a second wear-resistant layer are arranged in the cutter hub. The first wear-resistant layer is a diamond-like carbon (DLC) coating, and the second wear-resistant layer is a titanium nitride coating. The shield tunneling machine cutter solves the problem that an existing shield tunneling machine cutter body is poor in abrasion resistance, the first abrasion-resistant layer and the second abrasion-resistant layer are combined, the abrasion resistance of the cutter hub is greatly enhanced, the adaptability of the cutter to different stratums is improved, and therefore the tunneling performance of a shield tunneling machine is remarkably improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to a shield machine cutter technical field, concretely is a shield machine cutter body based on wear -resisting alloy material. BACKGROUND

[0002] The shield machine cutter is directly contacted with the rock and soil and carries out cutting or crushing, and its performance directly influences the tunneling efficiency and service life of the shield machine.

[0003] The traditional cutter body material is poor in wear resistance, in the tunneling process, especially in the hard rock stratum or high abrasion soil stratum, the cutter hub is easy to wear quickly, which not only leads to the frequent replacement of the cutter, increases the construction cost and downtime, but also influences the progress and quality of the tunneling.

[0004] In view of the above, we propose a shield machine cutter body based on wear -resisting alloy material to solve the above problems. CONTENT OF THE UTILITY MODEL

[0005] The utility model aims at providing a shield machine cutter body based on wear -resisting alloy material, and two layers of wear -resisting layers are coated, which can effectively solve the above problems.

[0006] In order to achieve the above object, the utility model provides the following technical scheme: a shield machine cutter body based on wear -resisting alloy material, including cutter ring and cutter hub, cutter hub is inserted with cutter shaft, cutter ring and cutter shaft interference fit, the outer surface of cutter ring is welded with first wear -resisting weld and second wear -resisting weld, the end surface of cutter hub is welded with third wear -resisting weld, the inside of cutter hub is equipped with base part, first wear -resisting layer and second wear -resisting layer, first wear -resisting layer is diamond -like carbon DLC coating, and second wear -resisting layer is titanium nitride coating.

[0007] Preferably, the first wear -resisting weld is in the shape of a wave, and the first wear -resisting weld is provided with two layers, which are located at the upper end and the lower end of the cutter hub respectively.

[0008] Preferably, the third wear -resisting weld is provided with a plurality of, and is annularly arranged on the end surface of the cutter hub.

[0009] Preferably, the first wear -resisting layer is coated on the upper and lower surfaces of the base part, and the second wear -resisting layer is coated on the surface of the first wear -resisting layer.

[0010] Compared with the prior art, the utility model has the advantages of the following:

[0011] (1) the shield machine cutter body based on wear -resisting alloy material of the utility model, when the cutter ring bears external force in the working process, the first wear -resisting weld in the shape of a wave can effectively disperse stress, and then effectively improve the wear -resisting effect, so that the cutter ring can better resist the wear of the stratum to the cutter.

[0012] (2) The utility model discloses a kind of cutter bodies of shield machine based on wear-resistant alloy material, third wear-resistant welding is provided with several and annularly arranged at the end face of tool hub, this one piece by piece annularly arranged mode, when certain annular block appears excessive wear, compared with the structure of whole wear-resistant welding layer, more convenient to carry out local repair.

[0013] (3) The utility model discloses a kind of cutter bodies of shield machine based on wear-resistant alloy material, first wear-resistant layer diamond-like carbon coating, high hardness, can resist wear and good chemical stability, can resist stratum acid-base corrosion, second wear-resistant layer titanium nitride coating, high hardness, wear-resistant, also have self-lubricating and beautiful golden yellow appearance, two kinds of wear-resistant layer are combined, greatly enhance the wear resistance of tool hub, improve the adaptability of cutter in different strata, so as to significantly improve the tunneling performance of shield machine. BRIEF DESCRIPTION OF DRAWINGS

[0014] Fig. 1 It is the overall perspective view of the utility model;

[0015] Fig. 2 It is the schematic view of third wear-resistant welding of the utility model;

[0016] Fig. 3 It is the schematic view of tool hub internal structure of the utility model.

[0017] In the drawing: 1, cutter ring;11, cutter shaft;12, first wear-resistant welding;13, second wear-resistant welding;2, tool hub;21, third wear-resistant welding;22, base portion;23, first wear-resistant layer;24, second wear-resistant layer. DETAILED DESCRIPTION

[0018] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor are within the protection scope of the utility model.

[0019] Please refer to Figs. 1-3The application discloses a shield machine cutter body based on wear-resistant alloy material, which comprises a cutter ring 1 and a cutter hub 2, a cutter shaft 11 is inserted in the cutter body, the cutter ring 1 is in interference fit with the cutter shaft 11, a first wear-resistant weld 12 and a second wear-resistant weld 13 are welded on the outer surface of the cutter ring 1, a third wear-resistant weld 21 is welded on the end surface of the cutter hub 2, the cutter hub 2 is internally provided with a base body 22, a first wear-resistant layer 23 and a second wear-resistant layer 24, the first wear-resistant layer 23 is a diamond-like carbon (DLC) coating, the second wear-resistant layer 24 is a titanium nitride coating, in use, the first wear-resistant weld 12 and the second wear-resistant layer 24 are specifically a high-chromium cast iron, the high-chromium cast iron is a typical iron-based wear-resistant alloy material, the alloy has high hardness, good wear resistance and certain corrosion resistance, can effectively resist wear and prolong the service life of the cutter.

[0020] Further, the first wear-resistant weld 12 is in a wave shape, and the first wear-resistant weld 12 and the second wear-resistant weld 13 are provided with two layers and are located at the upper end and the lower end of the cutter hub 2 respectively, in use, the wave-shaped first wear-resistant weld 12 can effectively disperse stress, so that the stress distribution of the cutter ring 1 is more uniform when the cutter ring 1 bears external force, and the wear-resistant effect is improved.

[0021] Further, the third wear-resistant weld 21 is provided with a plurality of annular blocks arranged on the end surface of the cutter hub 2, in use, the third wear-resistant weld 21 is arranged in the form of annular blocks, compared with the cutter ring with an integral wear-resistant weld layer, the structure is more convenient for local repair when excessive wear occurs in a certain annular block.

[0022] Further, the first wear-resistant layer 23 is coated on the upper and lower surfaces of the base part 22, and the second wear-resistant layer 24 is coated on the surface of the first wear-resistant layer 23. In use, the base part 22 is specifically tungsten carbide, which has very high hardness and good wear resistance, and can maintain sharpness when cutting hard strata such as rock, effectively breaking the rock. The first wear-resistant layer 23 is specifically a diamond-like carbon (DLC) coating, which has a hardness similar to that of diamond and can effectively resist wear. For a shield machine cutter, the high-hardness DLC coating can reduce friction and wear with the cut material when cutting rock or soil, and the DLC coating has a certain degree of chemical stability and can resist the erosion of some chemical substances in the strata. For example, when encountering soil containing acidic or alkaline components, the DLC coating can prevent the cutter base from being corroded, thereby maintaining the performance of the cutter. The second wear-resistant layer 24 is specifically a titanium nitride coating, which has a hardness of about 2000 HV and good wear resistance. After the titanium nitride coating is coated on the shield machine cutter, the service life of the cutter can be significantly improved, and the titanium nitride coating has a golden appearance, which has an advantage in some cases where the appearance of the cutter is required. At the same time, it also has a certain self-lubricating property, which can reduce the friction coefficient between the cutter and the rock-soil, reducing the wear of the cutter. The first wear-resistant layer 23 and the second wear-resistant layer 24 can effectively increase the wear resistance of the cutter hub 2, thereby increasing the use effect of the cutter hub 2.

[0023] Working principle: the utility model discloses a kind of based on wear-resistant alloy material's shield machine cutter body, when using, first wear-resistant weld 12, second wear-resistant weld 13 and third wear-resistant weld 21 play wear-resistant role in cooperation, first wear-resistant weld 12 is wavy and is located in the upper and lower ends of cutter hub 2 two layers, when cutter ring 1 is subjected to stratum reaction force, wavy structure makes stress dispersion along curve, avoid stress concentration, and its high chromium cast iron material quality resists wear by high hardness, stress dispersion effect is good, wear resistance can be kept for a long time, the third wear-resistant weld 21 of cutter hub 2 end surface is composed of several annular blocks, annular block alternately contacts stratum when cutting, realize uniform wear, if certain annular block is excessively worn, because it is independently arranged, can be individually positioned repair, reduce repair cost, this setting and first wear-resistant weld 12 jointly promote the wear resistance and maintainability of cutter whole, the first wear-resistant layer 23 coated on the base body portion 22 upper and lower surfaces of cutter hub 2 is diamond-like carbon DLC coating, DLC coating hardness is high, similar diamond, when cutting rock or soil, can effectively resist wear, and when stratum contains acidic or alkaline component, the chemical stability of DLC coating can prevent base body portion 22 from being corroded, maintain cutter performance, prolong service life, second wear-resistant layer 24 is titanium nitride coating, wear resistance is good, can further improve cutter service life, and titanium nitride coating is golden yellow, can satisfy the requirement of cutter appearance to special scene, simultaneously, its self-lubricating can reduce the friction coefficient of cutter and rock-soil, reduce wear, improve the use effect of cutter hub 2.

Claims

1. A shield machine cutter body based on wear-resistant alloy material, comprising a cutter ring (1) and a cutter hub (2), a cutter shaft (11) is inserted through the cutter center, the cutter ring (1) is in interference fit with the cutter shaft (11), characterized in that: The first wear-resistant weld (12) and the second wear-resistant weld (13) are welded on the outer surface of the cutter ring (1), the third wear-resistant weld (21) is welded on the end surface of the cutter hub (2), the cutter hub (2) is internally provided with a base body (22), a first wear-resistant layer (23) and a second wear-resistant layer (24), the first wear-resistant layer (23) is a diamond-like carbon DLC coating, and the second wear-resistant layer (24) is a titanium nitride coating.

2. A shield machine cutter body based on wear resistant alloy material according to claim 1, characterized in that: The first wear-resistant weld (12) is in a wave shape, and the first wear-resistant weld (12) is provided with two layers and is located at the upper end and the lower end of the cutter hub (2) respectively.

3. A shield machine cutter body based on a wear resistant alloy material according to claim 2, characterized in that: The third wear-resistant weld (21) is provided with a plurality of third wear-resistant welds and is annularly arranged on the end surface of the cutter hub (2).

4. A shield machine cutter body based on a wear resistant alloy material according to claim 3, characterized in that: The first wear-resistant layer (23) is coated on the upper and lower surfaces of the base body (22), and the second wear-resistant layer (24) is coated on the surface of the first wear-resistant layer (23).

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