STUDY ON SEQUENTIAL CUTTING MECHANISM AND INFLUENCING FACTORS IN GRANITE MILLING PROCESS

The efficient use of granite can fully reduce the generation of rock waste, and which will be conducive to energy saving and environmental protection. By analyzing the process of diamond milling cutter machining granite, the force condition of single particle diamond was analyzed in this paper. The mechanical formula of single particle diamond was derived, and the mechanical problems in granite milling were further studied. The numerical analysis method was used to study the influence of single particle and bi-particle sequential cutting on cutting performance under different cutting parameters. The results of numerical analysis showed that single particle cutting better reflects the influence of cutting depth and cutting velocity on cutting force, and the wave frequency of cutting force of the second particle is higher than that of the first particle during sequential cutting. The numerical model more realistically simulates the actual cutting process. In addition, scratch test was used to analyze the influence of cutting parameters on cutting force, and the simulation results were compared and analyzed. By comparing the simulation results and scratch test, the influence rule of cutting parameters, cutting depth and cutting velocity on cutting force was obtained, which provides certain theoretical basis for the optimization of granite milling parameters and has universal application significance for the processing of hard and brittle materials.