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Single blade double blade cutter ring disc ring used for shield
tunneling machine
Product Description
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 the tunnelling performance 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 the cutterhead - in soft ground called
cutting 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 the tunnel face. Depending on
the geology, the cutterhead is equipped with cutting knives and /
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, the TBM can 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 resist wear, 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.
In addition to the geology, limited space at the cutterhead and the maximum possible load on the disc cutter bearings are also crucial factors when choosing the appropriate tool size. A wide range of cutting knives, buckets, rippers and other tools complement the spectrum for operations in loose soils. With respect to these types of tools, the durability and material composition are also key factors in optimizing time and costs. The durability of the excavation tool edges and/or teeth is improved enormously by soldering carbide metal – tungsten carbide. Depending on the geology, cutting knives, buckets and rippers are given a welded hardfacing on the tool body to protect it against abrasive soil paste.
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
Application:
About us
Shanghai Tankii Alloy Material Co., Ltd. specialized in production
of Resistance Heating Alloy, Nickel Chromium Alloy, Iron Chromium
Aluminum Alloy, high speed steel products etc.
Based on the principle of "first quality, sincere service", our
managing ideology is pursuing technology innovation and creating
the top brand in the alloy field. We persist in Quality - the
foundation of the survival. It is our forever ideology to serve you
with full heart and soul. We committed to provide customers all
over the world with high-quality, competitive products and perfect
service.
Our products, such us nichrome wire, nichrome strip, fecral wire,
fecral strip, thermocouple wire, nickel wire, nickel strip have
been exported to Europe, USA, India, Southest Asia, South
America,etc.
We are willing to establish strong and long-time partnership with
our customers
Your inquiry is a gift for us, your reply is a trust to us, your
trust will bring us to provide you the best services in the
business.
Please email or call us if there is need on cutter ring. we will do
our best to meet your requirment.