Evaluating the wear of cutting tools using a tunnel boring machine laboratory simulator

Purpose. One of the most common problems in mechanized excavation is cutting tool wear, which has a great impact on final cost project and its duration. Also, one important factors affecting wear tools operating parameters tunnel boring machine (TBM). Within framework this research, laboratory simulator was designed constructed to investigate process laboratory. Methods. A few features device are that it operates horizontally, low rotation speed, keeps pins contact with fresh soil throughout test, possibility measuring torque during test. study conducted using granulation prepared from Tabriz metro line 2, as well machines, such penetration rate cutter head speed. Findings. The research results showed by reducing speed 35 10 rpm, average reduced 63%. time 80 minutes, 58%. increases increasing moisture content 0 10%, then decreases 25%. Originality. During new built simulate mechanisms. This measures percentage, torque. Practical implications. There been significant progress predicting abrasion rates, but there accepted models for rates. design construction simulator, effect examined.