Study on the Effect of Cutting Angle of Cutting Teeth on Cutting Performance
The application of cantilever type roadheader in coal mines has shown great advantages,and gradually promoted in metal mines.However,the cutting teeth are subjected to huge loads and strong impacts in the process of cutting the rock body,which leads to serious wear and tear of the cutting teeth,thus restricting the further popularization and application of the cantilever type roadheader.In order to optimize the cutting angle and improve the force on the teeth,Rhino software and PFC3D software were used to establish a rock model of the cutting angle of the teeth,which was simulated and verified by the existing test data,and on the basis of which the linear cutting simulation of the teeth was carried out on the granite by considering the cutting angles of different modifications,such as 45°,50°,55°,60°,65°.The results show that the cutting simulation test based on PFC3D software has reliable accuracy,and the relative errors between the simulation test and the indoor test results are 13.59%and 16.92%,respectively.The force on the teeth is different under different cutting angles,and the cutting angle of the teeth can be improved at 55°.It provides a reference for the design of cutter teeth structure of cantilever type roadheader.
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