Tunnel Boring Machine Cutter Head and Cutter

TBM Cutter Head and Cutter
This kind of cutter head is used for TBM machine . We could manufactureall kinds of cuter head according to different tunnel rockand slurry condition ,diameter from 1Meter to 14M . At the same time wecould manufacture all kinds of cutters on the cutter head , including singledisc cutter , double disc cutter ,triple disc cutter , scraper tools , breaker tools, loading tools . ripper tools , shoe type tools .Cutter rings are produced from high-speed steel alloy (H13) in different hardness to accommodate various geological conditions such as clay alluvium, granite, dolomite, basalt, and limestone. The diameter varies from 12″ to 21".
The quality and lifetime of the excavation tools have a noticeable effect on thetunnellingperformance and the economic efficiency of mechanized tunnelling. The high material quality of the tools ensures the productive removal of soil or rock on the one hand, and low downtimes due to high durability on the other. The excavation tools are installed on thecutterhead- in soft ground calledcutting wheel. With the rotational movement of the cutterhead and the thrust of the hydraulic jacking stations, the excavation tools loosen the rock and / or the soil at thetunnel face. Depending on the geology, the cutterhead is equipped withcutting knivesand / or disc cutters (discs) or rippers. To ensure that a project remains within the calculated budget, also with respect to tooling, the excavation tools must perform as forecast even with extremely high rock strengths, abrasion and water pressures.The nature of the ground conditions determines the choice and positioning of the excavation tools for the cutterhead or the cutting wheel. only if the tools are perfectly matched to the geology, theTBMcan achieve high tunnelling performances. However, the respective ground conditions challenge the reliability of the tools in different places. In soft soils, precautions must be taken to stop the disc cutters from getting clogged. During excavation in hard rock, such as granite, the disc cutters must pass the absolute hardness test.The correct steel mixture and an exact work process are of crucial importance in the materials composition and production of the disc cutters. The high-alloy tool steel of the cutting ring must not only be very hard to resistwear, the material toughness is also an important factor for its lifetime. Excessively brittle steel would lead to early material spalling at the cutting ring during rock bursts, which happen occasionally. Excavation tools up to 8 inches for smaller excavation diameters are also made of high-alloy tool steel.Advantages of cutter ring:
+ In-house manufacturing of high-quality excavation tools
+ Rapid and worldwide delivery of all common excavation tools for soft ground and hard rock
+ Longer life time of the ring, to save cost for you.
+ Customized tooling as per your request
+ Lower cost