The Study On Milling Force And Wear Test Of Diamond Cutter When Milling Stone

With the continuous development of economy and the quality of our life,natural stone,due to its excellent performance,has been widely used in our life,such as outdoor architectural decoration,bedroom floor decoration,bridge construction,roads and the production of various sculptures.The stone machining is related to the diamond tool.The milling performance of diamond tool directly affects the processing efficiency,lifespan of the cutting tool and the costs of process.The evaluation of milling performance is mainly base on the milling force of cutting tool which is affected by many factors,such as diamond cutter particle concentration,diamond tool material,stone hardness and processing parameters and so on.Among them,the process parameters are the important factors which mainly include the spindle speed,feed speed and milling depth.In this thesis,the stone named Xia Hong,Fo Gang Qing and Hei Jing Sha were analyzed by using EMCO155 numerical control machine tool with electroplated diamond cylindrical milling cutter,the relationship between the process parameters and the milling force of cutting tool were analyzed,then,the milling cutter surface wear was investigated and the following research results were obtained.(1)The relationship between the process parameters of diamond milling cutter and the cutting force was determined for three kinds of stone milled by diamond tool based on the single factor test on the milling force,The cutting force of milling cutter increased with the increasing of milling depth and feed rate,and the cutting force of milling cutter decreased with the increasing of spindle speed increases.(2)The experiments of three factors and three levels,including the factors of the milling depth,feed rate and spindle speed,were designed and completed the orthogonal test of milling force.The measured experimental data were analyzed by using orthogonal table and adopting the method of range analysis,variance analysis and regression analysis.The range analysis showed that the variation of the normal force,tangential force and axial force coincide with the results in the single factor test.The obviously effects of the milling depth,feed rate and spindle speed on normal force,tangential force and axial force were obtained by variance analysis.The mathematical model of the normal force Fx,tangential force Fy and axial force F,were established by using regression analysis,and the significance of the model coefficients was tested.(3)The wear surface of diamond milling cutter were analyzed and the wear of milling cutter was obtained.The wear of milling cutter increased with the increasing of milling depth and feed rate,and the result coincide with the experimental results of milling force and verified that the tool wear is mainly related to the milling force.Based on the high power microscope observation,the wear at the button edge of diamond cutter was the most serious,and the wear at the side was relatively light.In this thesis,the analysis on the milling force and the wear of diamond milling cutter provide the reference for the actual production.The reasonable selection of the process parameters is helpful to improve processing efficiency and service life of the cutting tool.The works,in this thesis,have also played a significant role in improving the manufacturing technology of milling cutter,milling performance and milling efficiency.