Litian Heavy Industry Machinery Co., Ltd.
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TBM Cutter Ring
Litian continues to carry out research and development in key fields such as materials, heat treatment process and manufacturing process, and at the same time carries out a large number of on-site tests and improvements in complex and difficult rock conditions. On the basis of maintaining good toughness of the cutter ring, the wear-resisting life of the cutter ring is greatly improved, which has become the first choice for TBM hard rock excavation.
| Optional Cutter Ring
| Description | |||
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Standard Cutter Ring | Suitable for drilling 50~150Mpa conglomerate, marble, sandstone and limestone formations. | |||
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Wear-resistant Cutter Ring | Suitable for excavation of 40Mpa compact strata, and 80～100Mpa fracture conglomerate, sandstone, sand clay and other strata. | |||
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Heavy-duty Cutter Ring | Suitable for tunneling 120~250Mpa hard rock, and 80~150Mpa high-wear rock strata, such as granite, diorite, porphyry, serpentine and basalt. | |||
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Alloy Insert Cutter Ring | Suitable for excavation of granite, basalt, porphyry and quartzite strata up to 150~250Mpa. | |||
| Blade Shape | Introduction | |||
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Flat Blade (HD) |
Mainly used for staMainly used for standard cutter rings, suitable for rocks with low uniaxial compressive strength.
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Arc Blade (HF) | The effect of breaking hard rock is good, and it is mostly used for heavy-duty cutter ring, suitable for hard rock with high strength. | |||
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Wedge Blade | The effect of breaking hard rock is good, and it is mostly used for heavy-duty cutter ring, suitable for hard rock with high strength. | |||
We can recommend cutter rings of different designs and production processes according to the rock working conditions and the arrangement of cutter heads to better meet customer needs.
In order to meet the requirements of various geological applications, Litian can provide a series of cutter rings with different specifications and performances so that the cutters can give full play to their best performance. In order to meet the needs of different products, our company has conducted in-depth research on the material of the cutting ring and treated it with different strengths, so that the hardness of the cutting edge reaches HRC60 and the life is increased by 30% ~ 50%.
Cutter Ring Parameter
| Specification | 12 inch (305mm) | 15.5 inch (394mm) | 17 inch (432mm) | 18 inch (457mm) | 19 inch (483mm) | 20 inch (508mm) |
| Whole Cutter Weight | 60~80kg | 125~170kg | 135~180kg | 145~195kg | 180~210kg | 185~215kg |
| Application Range (Cross-section Diameter) | 2~3m | 3~5m | >5m | >6m | >8m | >10m |
Cutter Ring Manufacturing Technique
Cutter Ring Material
The disc cutter ring is made of high-quality mold steel, containing CR, MO, V, NI and other alloy elements. It has high wear resistance, good impact resistance, good quenchability and strong hardness, which can make the whole disc cutter has strong physical and mechanical properties. We have combined the characteristics of various rock conditions in each project department to develop standard cutter rings and heavy-duty cutter ring materials. Using refining outside the furnace and electroslag remelting smelting process to reduce the content of harmful substances sulphur and phosphorus, and improve the performance of the material.
Forging process
We use the ring forging process (rolling forming) to ensure that the tissue fibers become continuous streamlines, improving the strength and wear resistance of the material, while the ordinary die forging metal tissue fiber streamlines are discontinuous, prone to chipping and breaking.
Heat treatment process
Our company adopts the heat treatment of vacuum furnace imported from Germany to avoid the precipitation of carbon on the surface; Reasonable heat treatment process, fine grain, fine ball alloy carbide uniform distribution.
Litian Cutter Section Ring Fiber Flow Diagram