Experimental researches on friction coefficient for disc cutters

The disc cutter is the main tool for Tunnel Boring Machine (TBM for short), both the rock breaking efficiency and service life of which are directly related to the project schedule and cost. On the basis of contact stress characteristic for disc cutter and its movement rules, the mechanical model of disc is established, together with the micro model of friction coefficient. By using the MMW-1 Vertical universal friction and wear testing machine, the dry friction test bench is designed to simulate friction counterparts between disc cutter and rock. By experiments, the changing rules of friction coefficient with time are separately analyzed between H13 steel and sandstone, H13 and marble as well as H13 and granite. Finally, the theoretical and experimental results of friction coefficient’s changing rules with 3 different rocks are obtained, which can provide a theoretical reference for the optimization design of disc cutter and improve the study of disc cutter rock breaking efficiency and service life. © 2016, UK Simulation Society. All rights reserved.