Study On High Efficiency Processing Key Technology And Saw Equipment Design Of Granite Thin Slab

Granite thin slab reduce production cost and adornment cost because of its thickness, at the same time can economical and effective utilization of the precious stone resources, so the process of granite thin slab whose width between 600mm and 1000mm attracted more and more attention. At present the process efficiency of thin slab is low, surface quality is poor, the tool life is short, and have already seriously restricted the mass production and application.For the above problems, the paper compared different processes of granite thin slab, analyzed the key technology associated with production efficiency and processing quality during saw and grind. Then planed the saw and grind equipment, researched the axial force and grinding trajectory, calculated the axial force and displacement caused by dynamic instability of the disc. By means of modal analysis, investigated the influence of parameters such as thickness, clamping ratio, rotating speed and diameter to dynamic performance. Proposed the correct principle during grinding and optimized the grind trajectory, investigated the critical economic thickness of granite thin slab. Considering the specificity of granite thin slab efficient processing, formulated the design index, developed and optimized the saw equipment based on modular design technology and 3d simulation technology, studied emphatically on the key structure such as beam unit and spindle unit.Simulation analyzed the performance of diamond circular thin disc under efficient processing parameters based on Finite Element software, the diameter of disc was 1600mm, the cutting speed was 80m/s, the feeding speed was 0.8mm/min and the cutting depth was 20mm. Tested comprehensive performance by static analysis, modal analysis under prestress and thermal-stress analysis, calculated the critical load of thin disc through buckling analysis, verified the parameters and the performance of thin disc were credible. Optimized the spindle unit based on matlab optimization toolbox in multi-objective function optimization, the optimization constraints were allowable torsion deflection angle, allowable deflection angle, and allowable stress, the objective function were stiffness and quality, the design variables were the central hole diameter, the span, and the overhanging length of spindle. The result showed the comprehensive performance of the spindle after optimization is better, when the central hole diameter was 90mm, the overhanging length was 50mm, the span was 350mm. The purpose of the paper are lower production costs, improve the processing efficiency, so the academic achievements can provide practical guidance for the process of thin slab. At the same time the Research ideas and research methods have a far-reaching influence on the theoretical investigation of thin and ultrathin slab processing.The paper is supported by Natural Science Foundation of Shandong Province (Z2007F07).