Research On Cutting Performance Of PCD Tool When High Speed Cutting 2A14-T6511 Duralumin Alloy

With the development of the manufacturing industry,the machining efficiency,quality is requested higher,and cost of the parts is requested lower.High speed cutting technology is a key technology of advanced manufacturing,because of its advantages of high cutting efficiency and good processing quality,it is the key research direction of modern machinery manufacturing industry.Aluminum alloy has advantages of high strength,low density,good plasticity,easy cutting and so on,it has been widely used in the fields of aviation,ship,automobile and so on.In recent years,with the using of polycrystalline diamond(PCD)tool,high speed cutting aviation aluminum alloy for reducing cost and realizing high quality and efficiency maintenance.The main research contents and results of this dissertation are as follows:1.In the cutting temperature measurement test,the results showed that among the various factors,cutting depth has the most significant influence on the cutting temperature,followed by corner radius,feed rate,and finally cutting speed.With the increase of the corner radius,cutting temperature appear to decreasing at first and then increasing;With the increase of the cutting speed,cutting temperature appear to increasing at first and then decreasing;With the increase of the cutting depth and feed rate,cutting temperature increases gradually.Finally,built and verified the cutting temperature forecasting models when r_ε=1.0mm.2.In the cutting force measurement test,it is shown that cutting depth has the most significant influence on the cutting force,followed by feed rate,and finally corner radius、cutting speed.With the increase of the corner radius,cutting forces appear to appear to decreasing at first and then increasing;The effect of cutting speed on cutting force is very small,and the effect on cutting force is inconsistent in different range;With the increase of the cutting depth and feed rate,cutting forces increases gradually.Finally,built and verified the cutting forces forecasting models.3.By measuring the 2A14-T6511 duralumin alloy machined surface roughness,the results showed that feed rate f has the most significant influence on the surface roughness,followed by corner radius、cutting depth,and finally cutting speed.With the increase of the corner radius,the surface roughness appear to increasing at first and then decreasing;With the increase of the cutting speed,the surface roughness appear to decreasing at first and then increasing and increasing again at last;With the increase of the cutting depth and feed rate,the surface roughness is increasing,but when cutting depth and feed rate very small,the surface roughness will be deteriorated.Finally,built and verified the surface roughness forecasting models when r_ε=1.0mm.4.Under the spindle speed of 10000~20000r/min,the high speed milling test was carried out on the 2A14-T6511 duralumin alloy with the PCD milling cutter,and surface roughness was between 0.39~0.75mm,which met the fine milling requirement.In this dissertation the PCD tools were used for high speed cutting 2A14-T6511duralumin alloy to investigate the effects of cutting parameters and corner radius on machining performance,providing theoretical basis and technical guidance for high quality and efficiency production of such materials.