Research On Machining Of Difficult-to-machine Materials With High Hardness

High hardness of difficult-to-machine materials difficult machining is extremely serious,with the aid of finite element simulation software Advant Edge,establishing the model of three-dimensional milling simulation Waspaloy alloy milling process,the design of orthogonal experiment to obtain the optimum parameters of the milling,and the milling force,milling temperature,cutter wear and chip shape variation characteristics and tool Angle to analyze the influence of the cutting performance and so on.The simulation results show that,within the given range of milling parameters,the milling parameters with the minimum milling force are n=1000r/min,v_f=80mm/min,a_p=0.8mm.At the lowest milling temperature,the milling parameters are n=700r/min,v_f=80mm/min,a_p=0.8mm.Tool wear is mainly affected by milling temperature.With the increase of milling temperature,the wear becomes more and more serious.The milling parameters with the minimum tool wear are n=700r/min,v_f=80mm/min,a_p=0.8mm.The degree of chip fragmentation increases with the increase of spindle speed.The milling experiment of Waspaloy alloy was carried out.Compared with the simulation results,the deviation of milling force was within 1.58%?14.68%,the deviation of milling temperature was within 5%,and the maximum deviation of tool wear was 15.5%.Under the minimum tool wear parameters,with the increase of milling length,the milling force gradually increases,the tool wear is serious,and the surface becomes rough.The milling force and milling temperature of CBN tool and carbide tool under different front Angle(0°and 5°)were analyzed by simulation.The results show that the milling force and milling temperature of 5°rake Angle tool are relatively small.By comparing the cutting surface wear of 5°front Angle CBN tool with that of carbide tool,the results show that the CBN tool has less wear and better cutting performance.In actual processing CBN tool is not ideal,serious oxidation wear and diffusion wear make the tool collapse and peeling phenomenon.Figure 53;Table 27;Reference 72...