Tungsten Carbide Shield Button

Introduction

Tungsten carbide shield button is the main accessories for mounting on the shield machine, which with high hardness, high were resistance, long service life and unparalleled sharp. Tungsten carbide shield button divided into tooth cutter and disc hob, tooth cutter is mainly used in weak stratum and stratum with strength below 20Mpa, disc hob suitable for high strength formations. For the tooth cutter, the main focus is on checking the structure of the cutter body. The robustness of the cutter head (the three ways of connecting the cutter head to the cutter body are mainly: welded, bolted and embedded) And the quality of the hard alloy on the cutter head, mostly for visual inspection.

Application

The disc hob removes the visible crack of the cutter ring, and the cemented carbide shield teeth have oil leakage. It is also necessary to use special tools and carbide shield running gear to test the start of the cemented carbide shield tooth. Torque and airtightness of carbide shield teeth. If the starting torque of the cemented carbide shield tooth is too large, the ground layer will not provide enough torque to make the carbide tooth shield rotation cause the cemented carbide shield tooth chord grinding if the tunneling torque is too large. If the torque is too small, the carbide shield bearing will inevitably be loose, which is not conducive to the force of the hard alloy shield teeth. Therefore, it is important to verify that the cemented carbide shield tooth starting torque value meets the design requirements provided by the manufacturer. At the same time, the airtightness of the cemented carbide shield teeth is an indicator to test the effect of the cemented carbide shield tooth seal. Poor air tightness can lead to leakage of cemented carbide shield tooth lubricant, which eventually leads to damage to the cemented carbide shield tooth bearing. Due to the fact that the bearing seal of the cemented carbide shield may not be installed in place during the assembly, or the inclusion of debris, the airtightness of the cemented carbide shield teeth may be poor, and it is not suitable to be detected at rest, only in the cemented carbide shield. When the tooth is running, it can be judged based on whether the lubricating oil leaks.

Usage Series

It is widely used in various shield cutters and is mounted on shield tunneling machines. Used in subway, railway, highway, municipal, hydropower and other tunnel projects.