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Processing technology of shield tunneling machine hobbing cutter ring with high wear resistance

A technology with high wear resistance and processing technology, used in mining equipment, earth-moving drilling, tunnels, etc., can solve the problems of carbide block wear, uneven wear of hob rings, and loose carbide blocks. Improve wear resistance and service life, enhance overall service life, enhance the effect of overall wear resistance

Active Publication Date: 2018-05-18
ANHUI LINGFENG METALLURGICAL MACHINERY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This application can increase the speed of excavation, reduce the wear of the tool and increase the service life of the tool, but the structure of the application is complex, the production process is difficult, and the production cost is high
[0004] Another example is the Chinese patent application number: 201620936968X, application date: August 25, 2016, the name of the invention is: a shield machine hob, the application discloses a shield machine hob, hob An annular groove is arranged on the outer circumference of the body, a through hole is arranged on one side wall of the annular groove, and a corresponding blind hole is arranged on the other side wall; The alloy block is provided with a mounting hole corresponding to the through hole; a connecting bolt is provided in the through hole, and the connecting bolt passes through the through hole and the mounting hole and is inserted into the blind hole; the application can theoretically realize the quick disassembly of the cemented carbide block It can reduce the overall replacement of the cutter ring, but the wear force of the cutter ring is extremely high in actual use, and it is difficult to effectively fix the cemented carbide block through bolt cooperation, and it is easy to cause the cemented carbide block to loosen in engineering practice. It is easy to cause greater wear to the cemented carbide block, and also affects the normal excavation

Method used

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  • Processing technology of shield tunneling machine hobbing cutter ring with high wear resistance
  • Processing technology of shield tunneling machine hobbing cutter ring with high wear resistance
  • Processing technology of shield tunneling machine hobbing cutter ring with high wear resistance

Examples

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Effect test

Embodiment 1

[0039] like Figure 1-Figure 3 As shown, the hob in this embodiment includes a cutter ring body 1, and an installation cavity 2 is opened in the cutter ring body 1. In actual use, the hob ring is installed on the central power shaft through the installation cavity 2 for driving For the rotation and feeding of the hob ring, the first and last ends of the installation cavity 2 are provided with an inclined inner wall 3 with an opening gradually enclosing outwards along the circumferential direction, such as figure 1 As shown, the setting of the inclined inner wall 3 facilitates the installation and positioning of the hob ring and the central power shaft. Further, the inner wall of the installation cavity 2 is an inclined inner wall, and the included angle with the vertical direction is 1°-2° (figure 1 (not marked in the middle), form the slope fit between the installation cavity 2 and the central power shaft, improve the fit tightness and facilitate the smooth disassembly between...

Embodiment 2

[0050] The processing technology of a hob ring of a high wear resistance shield machine in this embodiment is basically the same as that in embodiment 1, the difference is that the thickness of the hard alloy in this embodiment is 4mm, and the surface of the hard alloy is respectively high Out of the surface 1mm of the longitudinal transition section 4, the transverse transition section 5 and the frontal area 6; the angle α between the tangents of the transverse transitional section 5 on both sides of the frontal area 6 is 24° in the present embodiment, and the arc-shaped cemented carbide is The angle β between the tangent at the top of the front area 6 and the vertical plane is 15°.

Embodiment 3

[0052] The processing technology of a hob ring of a high wear resistance shield machine in this embodiment is basically the same as that in Embodiment 1, except that the thickness of the hard alloy in this embodiment is 3.5 mm, and the surface of the hard alloy is respectively 0.5 mm higher than the surface of the longitudinal transition section 4, the transverse transition section 5 and the frontal area 6; the angle α between the tangents of the transverse transitional section 5 on both sides of the frontal area 6 in this embodiment is 26°, and the arc-shaped hard The angle β between the tangent of the alloy at its top on the frontal area 6 and the vertical plane is 20°.

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Abstract

The invention discloses a processing technology of a shield tunneling machine hobbing cutter ring with high wear resistance, and belongs to the field of shield cutters. The processing technology is conducted by following the following steps that 1, smooth and communicated fixing grooves are formed in a longitudinal transition section, a transverse transition section and a positive area of the hobbing cutter ring in sequence; 2, heating treatment is conducted on the hobbing cutter ring, and then stainless steel alloy welding strips are adopted to weld a layer of stainless steel alloy evenly tothe inner wall of each side of the fixing grooves; and 3, after the step 2 is finished, hard alloy welding strips are adopted to weld hard alloy in the fixing grooves; and after welding is finished, insulation treatment is conducted on the hobbing cutter ring. According to the processing technology of the shield tunneling machine hobbing cutter ring with the high wear resistance, through reasonable arrangement of the hard alloy on the outer side of the shield cutter ring, the wear resistance of the cutter ring is effectively strengthened, the service life of the cutter ring is prolonged, the production cost is reduced, and the production loss is reduced.

Description

technical field [0001] The invention relates to the technical field of shield cutting tools, and more specifically relates to a processing technology for a hob ring of a high wear resistance shield machine. Background technique [0002] The construction of shield tunnel boring machine (referred to as shield machine) has the advantages of high degree of mechanization, fast construction speed, and high safety. It is widely used in large-scale construction projects such as mines, railways, and highways. The main tool for rock-breaking excavation is the key and vulnerable part of the shield machine. The hob cutter ring is always in contact with the rock during the entire excavation process. It is the working edge of excavation and rock breaking. It not only bears the huge thrust from the shield machine, but also withstands the severe wear of various hard substances in the rock. , resulting in serious wear of the cutter ring, the cutter ring must be replaced frequently, and the ...

Claims

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Application Information

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IPC IPC(8): B23P15/00E21D9/08
CPCB23P15/00E21D9/08
Inventor 刘道豹刘威刘发仙
Owner ANHUI LINGFENG METALLURGICAL MACHINERY
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