Active Member
|
[China]
Address: NO.1318,Huanghe North Road, Tianuan District,Zhuzhou City,Hunan Province,P.R.China 412000
Contact name:Linda Luo
ZhuZhou Better Tungsten Carbide Co., Ltd |
|
|
Pile Soil Engineering Piling Machines Parts Yg13c Tungsten Carbide Tbm Shield Cutters
Properties and Recommended Applications:
| Grade | Typical property values | Performance & Applications | ||
| Density(g/cm3) | Bending Strength(N/mm2) | Hardness HRA | ||
| YG11C | 14.45 | 2900 | ≥86.5 | Suitable for all kinds of hardness rock formation (f=14). |
| YG13C | 14.15 | 3100 | ≥85.5 | Suitable for hard rock formation (f=16). |
Genenral types of TBM cutters:
Shield cutters are mainly used for construction of urban railway,traffic tunnel like metro,utility tunnel for supplying,emission and others.
| Type of cutters | Description |
| Disc Cutter | Disc Cutter is hard rock tool. It is to crush the rocks by the extruding force, shearing force and tensile force formed by cutter rolling. ( The rock strength, rock integrality, tunneling distance, sand content determine the selection, quantity, arrangement of Disc cutters on the Cutter Head). Disc Cutter is generally used in the loose strata which contain much gravels with the diameter bigger than 400mm, and the mixed ground with clay, sandy and up to 30MPa strength rocks. |
| Pre-cutting Bit | Pre-cutting Bit is the first tool to excavate the soil. It cut along the radial direction of tunnel face to loosen the soil in advance, which can significantly improve the fluidity of soil layer and reduce cutting resistance, thus raising cutting efficiency and reducing damage to the cutter bits. Pre-cutting Bit has very good performance in sandy gravel and calcareous concretion strata. Heavy-duty Ripper is mainly used to break the lower strength and smaller-diameter cobbles and gravels. |
| Replaceable Cutter Bit | Replaceable Cutter Bit is one kind of Pre-cutting Bit. It can be installed in the Disc Cutter Holder to replace Disc Cutter in smaller-diameter gravel or intensely weathered rocks conditions. Replaceable Cutter Bit and Disc Cutter are spaced or alternated with each other in complex ground, so that Cutter Head can keep best composition during tunneling. |
| Central Cutter Bit | Central Cutter Bit is used to cut the central soil of excavation face. The role of Central Cutter Bit is to center the excavation face and loosen the soil. Central Cutter Bit can cut the central section soil and improve the fluidity of soil, so it can greatly increase Shield Machine tunneling efficiency. |
| Cutter Bit | Ordinary Cutter Bit is soft ground tool, it generally used for loose strata conditions like silt, fine silt, clay, medium sand, coarse-grained sand and gravelly sand layers. Cutter Bits are installed on the opening slots of Cutter Head and used for excavating most of the sections. While Shield Machine is moving forward, the Cutter Bit is rotating with Cutter Head. The rotation movement drives cutter edge and tool bit into soil and form axial shearing force( tunnel forward direction) and radial shearing force(tangential direction of Cutter Wheel) to do the excavation. |
| Heavy-duty Cutter Bit | Heavy-duty Cutter Bit is mainly used in hard rock stratum or complex strata containing sandy gravel with big diameter, gravel and sandy clay. Its role is to remove the muck to protect Roller Disc Cutter and Pre-cutting Bit body. |
| Scraper Bit | Scraper Bit is one kind of Cutter Bits which is installed on the extreme edge of Cutter Head. It is used to cut the soft soil around the Cutter Head to keep the same excavation diameter. It is also to remove the stone slag crushed by Disc Cutter and Pre-cutting Bit in the hard rock stratum and complex strata . |
| Protection Cutter Bit | Protection Cutter Bits are the auxiliary cutters. They are classified into Protective Cutter Bit for Cutter Head, Protection Cutter Bit for Cutter Holder, Protection Cutter Bit for foam filling hole , Protective Cutter Bit for injection hole and Diversion Cutter, which base on their different roles. |
| Copy Cutter Bit | Copy Cutter Bit is installed on the gauge area of Cutter Head. While Shield Machine tunneling along curve or adjusting the direction, Copy Cutter Bit tries to minimize overbreak to leave the sufficient space for Shield Machine successfully turning. |
| Cutter Holder | Cutter Holder is the connection of cutter and Cutter Head, which facilitates the cutter replacement. |
