哈工大机械原理大作业2凸轮机构设计30题.doc

We will continue to improve the companys internal control system, and steady improvement in ability to manage and control, optimize business processes, to ensure smooth processes, responsibilities in place; to further strengthen internal controls, play a control post independent oversight role of evaluation complying with third-party responsibility; to actively make use of internal audit tools detect potential management, streamline, standardize related transactions, strengthening operations in accordance with law. Deepening the information management to ensure full communication zero resistance. To constantly perfect ERP, and BFS+, and PI, and MIS, and SCM, information system based construction, full integration information system, achieved information resources shared; to expand Portal system application of breadth and depth, play information system on enterprise of Assistant role; to perfect daily run maintenance operation of records, promote problem reasons analysis and system handover; to strengthening BFS+, and ERP, and SCM, technology application of training, improve employees application information system of capacity and level. Humanistic care to ensure zero. To strengthening Humanities care, continues to foster company wind clear, and gas are, and heart Shun of culture atmosphere; strengthening love helped trapped, care difficult employees; carried out style activities, rich employees life; strengthening health and labour protection, organization career health medical, control career against; continues to implementation psychological warning prevention system, training employees health of character, and stable of mood and enterprising of attitude, created friendly fraternity of Humanities environment. To strengthen risk management, ensure that the business of zero risk. To strengthened business plans management, will business business plans cover to all level, ensure the business can control in control; to close concern financial, and coal electric linkage, and energy-saving scheduling, national policy trends, strengthening track, active should; to implementation State-owned assets method, further specification business financial management; to perfect risk tube control system, achieved risk recognition, and measure, and assessment, and report, and control feedback of closed ring management, improve risk prevention capacity. To further standardize trading, and strive to achieve according to law, standardize and fair. Innovation of performance management, to ensure that potential employees zero fly. To strengthen performance management, process control, enhance employee evaluation and levels of effective communication to improve performance management. To further quantify and refine employee standards . Work, full play party, and branch, and members in five type Enterprise construction in the of core role, and fighting fortress role and pioneer model role; to continues to strengthening four good leadership construction, full play levels cadres in enterprise development in theHarbin Institute of Technology机械原理大作业二课程名称： 机械原理 设计题目： 凸轮机构设计 1.设计题目设计直动从动件盘形凸轮机构，其原始参数见表1表一： 凸轮机构原始参数升程（mm)升程运动角（）升程运动规律升程许用压力角（）回程运动角（）回程运动规律回程许用压力角（）远休止角（）近休止角（）140150正弦加速度30100等减等加速6035752.凸轮推杆运动规律（1） 推程运动规律（正弦加速度运动） 推程 推程 （2） 回程运动规律（等加速等减速运动） 回程 3.运动线图及凸轮线图采用Matlab编程，其源程序如下：function psi,s,v,a,f,F=fsva2(h,phi01,phis01,phi02,phis02,n)w=2*pi*n/60;psi1=linspace(0,phi01,round(phi01)+1); %推程正弦加速s1=h*(psi1/phi01-sin(2*pi*psi1/phi01)/(2*pi);f1=h/(phi01*pi/180)-h*cos(2*pi*psi1/phi01)/(phi01*pi/180);F1=2*pi*h*sin(2*pi*psi1/phi01)/(phi01*pi/180)2);v1=h*w*(1-cos(2*pi*psi1/phi01)/(phi01*pi/180);a1=2*pi*h*w2*sin(2*pi*psi1/phi01)/(phi01*pi/180)2); psi2=linspace(phi01+1,phis01+phi01,round(phis01); %远休程s2=h*ones(1,length(psi2);f2=zeros(1,length(psi2);F2=f2;v2=zeros(1,length(psi2);a2=zeros(1,length(psi2); psi01=linspace(phi01+phis01,phi01+phis01+phi02/2,round(phi02/2); %等减等加速s01=h-2*h*(psi01-(phi01+phis01).2/(phi022);f01=-4*h*(psi01-(phi01+phis01)/(phi022*pi/180);F01=-4*h/(phi01*pi/180)2)*ones(1,length(psi01);v01=-4*h*w*(psi01-(phi01+phis01)/(phi022*pi/180);a01=-4*h*w2/(phi02*pi/180)2)*ones(1,length(psi01); psi02=linspace(phi01+phis01+phi02/2+1,phi01+phis01+phi02,round(phi02/2);s02=2*h*(-psi02+(phi01+phis01+phi02).2/(phi022);f02=-4*h*(-psi02+(phi01+phis01+phi02)/(phi022*pi/180);F02=4*h/(phi02*pi/180)2)*ones(1,length(psi02);v02=-4*h*w*(-psi02+(phi01+phis01+phi02)/(phi022*pi/180);a02=4*h*w2/(phi02*pi/180)2)*ones(1,length(psi02); s3=s01,s02;f3=f01,f02;F3=F01,F02;v3=v01,v02;a3=a01,a02;psi3=psi01,psi02; psi4=linspace(phi01+phis01+phi02+1,360,round(phis02); %近休程s4=zeros(1,length(psi4);f4=zeros(1,length(psi4);F4=f4;v4=zeros(1,length(psi4);a4=zeros(1,length(psi4);psi=psi1,psi2,psi3,psi4;s=s1,s2,s3,s4;f=f1,f2,f3,f4;F=F1,F2,F3,F4;v=v1,v2,v3,v4;a=a1,a2,a3,a4;function huatu(psi,s,v,a,f)figure(1)subplot(3,1,1);plot(psi,s),grid onxlabel(凸轮转角(o);ylabel(位移（mm）);title(凸轮机构运动规律)subplot(3,1,2);plot(psi,v),grid onxlabel(凸轮转角(o);ylabel(速度（mm/s）);subplot(3,1,3);plot(psi,a),grid onxlabel(凸轮转角(o);ylabel(加速度（mm/s2）);figure(2)plot(f,s),grid onxlabel(ds/df);ylabel(s(f)窗口输入下面命令： psi,s,v,a,f,F=fsva(140,150,35,100,75,1); huatu(psi,s,v,a,f)可得运动规律图如下：1. 凸轮的基圆半径和偏距 以ds/df-s(f)图为基础，可分别作出三条限制线（推程许用压力角的切界限Dtdt,回程许用压力角的限制线Dtdt，起始点压力角许用线B0d)，以这三条线可确定最小基圆半径及所对应的偏距e,在其下方选择一合适点，即可满足压力角的限制条件。利用matlab作图，其代码如下：function x,d1,d2,x0,d0=er(s,f,a1,a2) %d1,d2,d0为三条限制线y值，可确定最小基圆半径k1=tan(pi/2-a1*pi/180);k2=-tan(pi/2-a2*pi/180);ym1=0;ym2=0;for i=1:361 if f(i)0 y1=-k1*f(i)+s(i); if y1ym1 ym1=y1; f01=f(i);s01=s(i); %求的推程限制线对应的切点坐标 end else y2=-k2*f(i)+s(i); if y2 x,d1,d2,x0,d0=er(s,f,30,60); plot(x,d1,x,d2,x0,d0)，axis equal得图如下：得最小基圆对应的坐标位置大约为（36.4，-62.8）经计算取偏距e=35mm，r0=80mm.4.滚子半径及凸轮理论廓线和实际廓线为求滚子许用半径，须确定最小曲率半径，以防止凸轮工作轮廓出现尖点或出现相交包络线，确定最小曲率半径数学模型如下：其中：利用上式可求的最小曲率半斤，而后可确定实际廓线。理论廓线数学模型： 凸轮实际廓线坐标方程式： 其中rt为确定的滚子半径。 根据上面公式，利用matlab编程求解，其代码如下：function pm=qulv(psi,s,f,F,e,r0)s0=sqrt(r02-e2);Q1=(s0+s).*cos(psi*pi/180)+(f-e).*sin(psi*pi/180);Q2=-(s0+s).*sin(psi*pi/180)+(f-e).*cos(psi*pi/180);A0=sqrt(Q1.2+Q2.2);A=A0.3;S1=(2*f-e).*cos(psi*pi/180)+(F-s0-s).*sin(psi*pi/180);S2=(F-s0-s).*cos(psi*pi/180)-(2*f-e).*sin(psi*pi/180);B=Q1.*S2-Q2.*S1;p=A./B;pm=100;for i=1:length(psi) if abs(p(i)pm pm=p(i); endend在命令窗口输入：pm=qulv(psi,s,f,F,35,80)pm =75.0207 故，可判断出rt rt=18； huatu2(psi,s,f,35,80,rt)得图如下： 仿佛顷刻间，亚运就来到了我们身边。一个普通的人，很难想象它背后隐藏着多少人的心血，藏匿着多少人的汗水，背负着多少人的梦想，寄托了多少人的祝愿，在这个激动人心的时刻，在这个万众瞩目的地方of backbone backbone role; to full strengthening members youth work, full play youth employees in company development in the of force role; to improve independent Commission against corruption work level, strengthening on enterprise business key link of effectiveness monitored. , And maintain stability. 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