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Click to edit Master title style,Click to edit Master text styles,Second level,Third level,Fourth level,Fifth level,*,什么是切削三要素,车削与镗削,：,车削速度,Vc,刀片切深,ap,每转走刀量,fn;,铣削：,铣削速度,Vc,铣刀轴向切深,ap,径向切深,ae,，,每齿走刀量,fz,;,钻削,：,钻削速度,Vc,钻头每转进刀量,fr,加工效率,金属去除余量,=,apxfr,(z),xVc,20/50%,20/20%,50/20%,选择切削参数的方法,一、根据刀片盒选择切削参数,二、参考样本上切削参数一栏中的切削速度推荐值,三、使用切削参数选择软件,Make use of the tools,Utilize the potential of,a,p,-,to reduce number or cuts,f,n,-,for shorter cutting time,v,c,-,for best tool life,Compensation of cuttingspeed for tool life,Application range,Speed range,10 min.tool life15 min.tool life30 min.tool life,The basis of a tool life,Tool life(Mins.),Correction factors,“Start value”,Fr 粗车=一半的刀尖圆弧半径值,车削功率和扭矩计算,Vc,=,3.14,xD,xRPM,1000,V=,Vc,xap,xfr(mm,3,/min),Time=,L,fr,xN,P=,Vc,xap,xfr,xkc,60037.2,举例,：车削奥氏体不锈钢外圆，工件硬度,HB200,工件直径,75mm,切深3,mm,走刀量0.2,mm/r,切削速度230,m/min,材料单位切削力为2900,N/mm2,加工长度为100,mm,RPM=(230X1000)/(3.14X75)=976,转每分钟,金属去除率,V=230 x2x0.2=92,立方厘米每分钟,每加工一个零件的时间=100/(0.2,x976)=0.51,分钟,车削功率,P=(230 x3x0.2x2900)/60037.2=6.7,千瓦,车削力=2900,x0.2 x3=1740,牛顿=177.5公斤,车削扭矩,T=1740 x37.5=65,牛顿米,F,力=,Kc,xfr,xap,T=,F,力,x(D/2),=P x9549/RPM,镗削功率和扭矩计算,P=,Vc,xap,xfr,xkc,60037.2,T=,F,力,x(D/2),=P x9549/RPM,举例,：镗削奥氏体不锈钢，工件硬度,HB200,工件直径,75mm,切深3,mm,走刀量0.2,mm/r,切削速度115,m/min,材料单位切削力为2900,N/mm2,加工长度为100,mm,RPM=(115X1000)/(3.14X75)=488,转每分钟,金属去除率,V=115x2x0.2=46,立方厘米每分钟,每加工一个零件的时间=100/(0.2,x488)=1.02,分钟,镗削功率,P=(115x3x0.2x2900)/60037.2=3.35,千瓦,镗削力=2900,x0.2 x3=1740,牛顿=177.5公斤,镗,削扭矩,T=1740 x37.5=34,牛顿米,计算镗削功率时注意,Vc,减半，即,Vc,镗,1/2Vc,车,铣削三要素,Cutting data formulas,铣削功率和扭矩的计算,铣削功率和扭矩的计算,Power consuming and Torque force,Torque(Nm)=kW,(,nett,)x 9549,RPM,铣削功率和扭矩的计算,Power consuming and Torque force,面铣刀直径,80mm,6,个刀片刃口，铣削的材料分别为铸铝合金（,kc:800),和奥氏体不锈钢(,kc:2400),若刀片的切削速度为600,m/min,和150,m/min,每齿进刀为,fz,=0.2mm/z,切深,ap,=4mm,切宽,ae,=60mm,问他们的铣削功率和扭矩,N,铝=2388,rpm,vf,铝=2865,mm/r,p,铝=9.16,kw,T,铝=36,Nm,N,不锈钢,=597,rpm,vf,不锈钢,=716,mm/r,p,不锈钢,=6.87,kw,T,不锈钢,=109,Nm,U,钻钻削功率和扭矩的计算,Power consuming and Torque force,例：工件材料为高合金钢，硬度,HRC50,，,钻削直径,20mm,，,Vc,40m/min,，,f,0.07mm/r,，,Kc,4500N/mm,2,，,0.9,，,计算钻削功率和扭矩。,P=,Kc,fVc,（,D,2,d,2,）,D,240000,钻削功率,P,4500,0.07,40 20/240000 0.9=1.2KW,转速,n=40 1000/3.14 20=636rpm,扭矩,T=1.2 9549/636=18NM,T=,F,力,x(D/2),=P x9549/RPM,D:hole diameter,d:core,diamerer,
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