Replacement Standard of TBM Cutting Tools

What is the replacement standard for TBM cutting tools?

The TBM cutting tools replacement standard does not have a fixed value, and the cutter worker needs to judge whether and when to replace them according to the actual work situation.

Under normal wear conditions of TBM disc cutters, they need to be replaced when the gauge cutter ring is worn out by about 10-15 mm, and the face cutter and the center cutter ring are worn out by about 20-25 mm. Because the cutting blade of the TBM disc cutter ring becomes wider at this time, the ability of the disc cutter to cut rock is reduced, and the torque and thrust required for tunneling will increase, which increases the load on the tunnel boring machine hydraulic system and motor system. The cut rock will wear to the cutter head and reduce the service life of the TBM cutters if the worn cutter ring is not replaced in time.

However, if the disc cutter is replaced frequently under the condition of less than the above-mentioned replacement standard, the proper performance of each disc cutter ring cannot be exerted, and a lot of precious time will be wasted.

In addition, in the case of abnormal wear and tear of the TBM disc cutters, such as serious damage to the blade of the cutter ring, damage to the bearing, leakage of sealing oil, etc., the TBM cutter needs to be replaced in time. Because this will increase the load of the adjacent TBM cutters drilling rock, which will not only affect the normal excavation of the TBM, but also affect the normal use of the adjacent TBM cutters, which will cause a large number of TBM cutting tools chain damage.

The TBM cutters will gradually wear out and become smaller or damaged after the hard rock tunnel boring machine has been digging for a period of time. If the TBM cutters are measured and checked to confirm that some of them can no longer be used, the TBM cutters need to be replaced, otherwise, the normal excavation of the TBM cutting tools will be affected.

There are many forms of wear and damage to TBM cutting tools. Careful analysis of each damage form of TBM cutting tools can help workers to correctly grasp the replacement time of the TBM cutters. It is beneficial to maximize the energy of each TBM cutter, and it is more conducive to the normal excavation. The TBM cutters play a positive role in reducing production costs and saving maintenance and replacement time.

Litian Rock Tools can provide optimized configuration of TBM cutters according to different geological features, allowing users to achieve a better balance between cost and efficiency.

We have a complete TBM disc cutter development, design, manufacture, assembly, commissioning, maintenance and transformation technical team, which can provide equipment selection consultation, independent design, development, manufacturing, and professional after-sales service. Welcome customers from all over the world to visit and consult.