Innovative Design Of Cutting Edge Of Ti6Al4V Cemented Carbide Coated Tool

Ti6Al4V titanium alloy is a kind of difficult to machine material,which is widely used in ships,aviation,aerospace and medicine.China is a tool manufacturing and consuming country in the world,many tools have achieved independent production,but the high-end tool,especially the difficult machining material cutting tool is still heavily dependent on imports,so the design methods of hard machining material cutting tool and theoretical study is especially urgent.This thesis uses Ti6Al4 V material as the research background,in order to reduce the rake face of the tool chip temperature as the goal,proposed the rake face of the tool chip contact area temperature field based on the new idea of micro pits design and study.Based on the analysis of properties of titanium alloy materials at home and abroad as well as the cutter design method,the hard alloy coating tool available in the market sales of an enterprise as an example,analysis and application of Deform 3D simulation study on the rake face temperature characteristics,extraction temperature field data,establish the shapes of temperature field model of temperature field the micro pits were parameterized,determine the key parameters of temperature field of micro pit shape micro hole depth,crater length,maximum width and minimum width,the minimum distance from the cutting edge.The temperature field of micro pit shape as the rake face of innovative design basis for the cutter to establish solid modeling,simulation and analysis of the model,study the influence of micro hole parameters of cutting force and cutting temperature,cutting simulation test analysis of variance indicated that the crater shape parameters on tool temperature was the highest effect of the size of the order and the significant effect on the average cutting force of the cutter sequence were: the micro pit’s depth > the crater length > the maximum width > the minimum width > the minimum distance from the cutting edge,the micro pit’s depth > crater length > the minimum width > the maximum width > the minimum distance from the cutting edge.The minimum cutting force for the parameter design of micro pit target optimized to a micro pit’s depth h=0.12 mm,crater length l=2.58 mm,minimum width W_min=0.35 mm,maximum width W_max=0.73mm;micro pit design parameters to the maximum cutting temperature is the lowest preferred target was obtained micro pit’s depth h=0.12 mm,crater length l=2.58 mm,maximum width W_max=0.73 mm,minimum width W_min=0.35 mm.The optimized micro pit tool modeling tool recommended in the original cutting simulation using cutting parameters,the maximum temperature of the cutter tool is lowered from the original 719℃ to the optimized parameters of micro hole cutter of 569℃,cooling rate of about 20.86%,significantly.Based on the optimized design parameters of micro pit crater tool,using the matrix carbide materials,coating materials and pressing were the same with the original tool preparation of micro pit cutting tool,orthogonal experiment design,experimental test platform is built up using the comparative research method,respectively,to study the effects of cutting speed,cutting depth and feed three cutting parameters on cutting force,surface roughness and chip morphology,the results of the experiment of micro pit tool and raw tool,found that the average cutting force of micro pit tool decreased by 6.9% compared with the original tool,micro pits machining tool surface roughness is lower than that of the original surface processing tool,a drop of 16.2% short.The screw chip shape by continuous screw turning roll type into the original micro pit tool roll type,showing a good characteristic of chip breaking.SPSS multiple linear regression analysis of data,this paper establishes a forecast model of cutting force and surface roughness of the micro hole theory,3 cutting force prediction model were,,);micro pit tool roughness prediction model:,and verify the experimental design of the predictive model.The analysis results obtained from the experimental data: the model established is correct,good fit of the regression results are obvious.Analysis of the influence of cutting parameters on cutting force and surface roughness,found that compared with the original tool,cutting parameters on micro pits three cutting force and surface roughness affects the relationship between the primary and secondary degree change,influence trend with the original tool performance good consistency.