High-toughness wear-resistant shield tunneling machine inserted hob cutter ring and preparation method thereof

Abstract

The invention provides a high-toughness wear-resistant shield tunneling machine inserted tooth hob cutter ring and a preparation method thereof, which are used for solving the technical problems of low bonding strength between cutter teeth and a cutter ring base body, poor cutter tooth toughness, single cutter tooth shape and high manufacturing cost of the inserted tooth hob cutter ring manufactured by the existing process. The cutter teeth are printed and generated on the cutter ring base body prepared in advance layer by layer through the 3D printing technology, the cutter teeth and the cutter ring base body are in metallurgical bonding, the bonding strength is high, tissue grains of the cutter teeth are small, the performance is better, and the performance of the cutter teeth can be remarkably improved; 3D printing forming is flexible, cutter teeth of different specifications and different tooth shapes can be manufactured according to the specific use environment, and a mold does not need to be manufactured again; the cutter ring base body and the cutter teeth are subjected to tempering heat treatment through the same technology, synchronous tempering can be achieved, the toughness, hardness and abrasion resistance of the manufactured cutter ring base body and the manufactured cutter teeth are excellent, and the using requirements can be effectively met under the high-abrasion, strong-extrusion and high-impact working environment.

Description

technical field [0001] The invention relates to the technical field of construction equipment for tunnels and subways, in particular to a high-toughness wear-resistant shield machine insert hob cutter ring and a preparation method thereof. Background technique [0002] With the development of society, the demand for tunnel and subway construction is increasing rapidly. The shield machine has the advantages of high construction efficiency and strong geological adaptability, and has become the main equipment for tunnel construction. During the construction process, the shield machine relies on the hob installed on the cutterhead to break rocks. When encountering hard rock formations or sandstone formations, the hob cutter rings are severely worn and frequent tool changes are required, which reduces construction efficiency and increases construction cost. [0003] At present, in order to ensure construction efficiency, a large number of insert cutter rings with better wear res...

AI Technical Summary

Problems solved by technology

[0005] Aiming at the technical problems of low bonding strength between the cutter teeth and the cutter ring base, poor toughness of the cutter teeth, single shape of the cutter teeth and high manufacturing cost of the insert cutter ring made by the existing technology, the present invention proposes a high toughness wear-resistant shield machine The tooth-inserted hob cutter ring and its preparation method print the cutter teeth layer by layer on the pre-prepared cutter ring substrate through the 3D printing process. The cutter teeth and the cutter ring substrate are metallurgically bonded, with high bonding strength, which effectively improves the toughness of the cutter teeth , and the 3D printing process parameters can be adjusted according to the needs to adjust the shape of the printed blade without re-making the mold, which can effectively increase the diversity of blade shapes. Printing only the blade alone can also effectively reduce the production cost and improve production efficiency

Images