(3-2)Р代入(3-2)计算:n===30.08r/minР3.1.3 铣削力计算Р查[1] 表P9-109公式得:=(3-3)Р查[1] 表9.4-10Р= 294 =1.0 = 0.65 =0.83 Р=0 =0.83Р又Z=26 ==4.7mm =0.12mm =1.0 n=30.08r/minР代入公式(3-3)得:Р==467.61NР铣削力与的关系:Р逆铣: =1.0-1.2 顺铣: =0.8-0.9Р逆铣时,取=1.1;顺铣时,取=0.8Р=1.1467.61=514.37N =0.8467.61=374.09NР铣削力与的关系:Р逆铣=0.2-0.3 顺铣=0.75-0.80Р逆铣时,取=0.25 顺铣时,取=0.775Р=0.25467.61=116.90N =0.775467.61=362.40NР3.2 滑台受力分析及其计算Рa, 运动部件滑台和夹具及工件的最大总和质量M=700(kg)Рb, 液压动力滑台为矩凹槽平导轨,静摩擦系数f1=0.27;动摩擦系数f2=0.18Рc, 运动过程速度切换的加、减速度时间t=0.05(s)。Р滑台受力情况。见图3-1Р 图3-1 滑台受力分析Р系统功能设计:Р(1) 工况分析Р摩擦力F=Mg=0.2 4000=800N Р =Mg=0.14000=400NР 工进,工退时所需推动Р =(Mg-)=0.1(4000-116.90)=388.31(逆铣)Р =(Mg+)=0.1 (4000+362.40)=436.24(顺铣)Р?=M=4000=5466.67N V1= V2 =4666.67 = M=4000=4666.67NР?=4666.67NР惯性力=m==54.432NР工作台液压缸外负载计算结果见表3-1,设液压缸的机械效率为=0.95Р表3-1液压缸各运动阶段负载表Р工况Р 计算公式Р液压缸负载(N)