A gradient hardness heat treatment method for hob cutter rings of a full-section tunnel boring machine

A technology of tunnel boring machine and heat treatment method, applied in the field of vacuum heat treatment, which can solve the problems of unsuitability for mass production, unstable quality, and low production efficiency, and achieve the effects of facilitating installation and cooperation, reducing the overall fracture tendency, and high hardness

Active Publication Date: 2017-03-15
凌远科技股份有限公司
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  • Application Information

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Problems solved by technology

[0009] The purpose of the present invention is to propose a gradient hardness heat treatment method for the hob cutter ring of a full-face tunnel boring machine, which solves the complex process and unstable quality of the existing technology, which is only suitable for testing in the laboratory or single-piece production, and is not suitable for Mass production, low production efficiency

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  • A gradient hardness heat treatment method for hob cutter rings of a full-section tunnel boring machine
  • A gradient hardness heat treatment method for hob cutter rings of a full-section tunnel boring machine
  • A gradient hardness heat treatment method for hob cutter rings of a full-section tunnel boring machine

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Embodiment Construction

[0036] Embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0037] See attached figure 1 And attached figure 2 , the gradient hardness heat treatment method of the full-face tunnel boring machine hob cutter ring of the present invention comprises the following steps:

[0038] Step 1: using 2520 heat-resistant white steel plate to process an upper cover plate 1 and a lower cover plate 7 with the same structure, the diameters of the upper cover plate 1 and the lower cover plate 7 are larger than the diameter of the end 8 of the hob cutter ring 5;

[0039] Step 2: Process a circular groove on one surface of the upper cover plate 1 and the lower cover plate 7;

[0040] Step 3: Process a sleeve 4 with 2520 heat-resistant white steel pipe, the height of the sleeve 4 is the height of the combined multiple hob cutter rings 5, and the outer diameter of the sleeve 4 is smaller than the hob cutter ring 5 inner diameter;...

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Abstract

A gradient hardness heat treatment method for hob cutter rings of a full-section tunnel boring machine belongs to the technical field of vacuum heat treatment. The objective of the invention is to overcome problems that processes at present are complex and a production efficiency is low. The method includes assembling a plurality of the hob cutter rings of the same size to obtain an integrated assembly of the plurality of hob cutter rings, subjecting the obtained assembly of the hob cutter rings to vacuum quenching treatment, and subjecting the assembly subjected to quenching treatment to 2-3 times of tempering so as to allow the hardness of the hob cutter rings to reach process requirements and to complete heat treatment. The gradient hardness of the hob cutter rings subjected to vacuum oil quenching is achieved by adjusting the quenching process. An auxiliary structure used is simple and the production efficiency is increased.

Description

technical field [0001] The invention belongs to the technical field of vacuum heat treatment, and in particular relates to a gradient hardness heat treatment method for hob cutter rings of full-section tunnel boring machines. Background technique [0002] TBM (full-face tunnel boring machine) hob cutter ring has a gradient hardness from low to high hardness from the end to the blade, which can improve the assembly quality and help improve the service life of the cutter ring, but most of the cutter rings currently The hardness of each part is uniform. Aiming at gradient hardness, universities and other research departments have done a lot of experiments on controlling the tempering temperature of the workpiece (that is, using intermediate frequency induction tempering treatment) to realize the gradient hardness of the knife ring and the gradient hardness during vacuum air quenching. [0003] For the treatment of the gradient hardness of the hob cutter ring, one of the existi...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21D9/22C21D1/18C21D1/70
CPCC21D1/18C21D1/70C21D9/22
Inventor 张凌黄石起李相吉
Owner 凌远科技股份有限公司
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