机械原理凸轮机构大作业.pdf

凸轮大作业凸轮大作业利用计算机辅助设计完成下列偏置式直动滚子推杆盘形构件（推杆的移动副导路位于凸轮盘回转中心右侧）或摆动滚子推杆盘形凸轮机构的设计，设计已知数据如下表所示，机构中凸轮沿着逆时针方向作匀速转动。凸轮机构的推杆在近休、推程、远休及回程阶段的凸轮转角近修凸轮转角推程凸轮转角远修凸轮转角回程凸轮转角04545180180270270360偏置直动滚子推杆盘形凸轮机构的已知参数初选基圆半径R0/mm偏距e/mm滚子半径Rt/mm推杆行程h/mm许用压力角a1a2许用最小曲率半径P amin30+5102830700.3Rt二、动规律及凸轮廓线方程推程等加速s 2h2/02等减速s h2h(0)2/02回程理论轮廓廓线方程x=(s+s)sin+ecos0y=(s+s)cos-esin 0工作廓线方程x=x-rtcos实际廓线方程：y=y-rsin tsin(dx/d)/(dx/d)dy/d22cos(dy/d)/(dx/d)dy/d22xx rrcosyy rrsin三、原始程序#include#include using namespace std;#define N 120#define pi 3.1415926double oro=0.5;double rt=10,h=28,e=5,a_max1=30*pi/180,a_max2=70*pi/180,p_min=3;double change_angel(int d)return d*pi/180;double f_s0(double r0,double e)return pow(pow(r0,2)-pow(e,2),0.5);double f_s(double a)double s;if(a=0&a=45)s=0;else if(a=112.5)s=2*h*pow(a-45,2)/pow(135,2);else if(a=180)s=h-2*h*pow(180-a,2)/pow(135,2);else if(a=0&a=45)s1=0;else if(a=112.5)s1=64*h*(change_angel(a)-(pi/4)/9/pow(pi,2);else if(a=180)s1=64*h*(pi-change_angel(a)/9/pow(pi,2);else if(a=0&a=45)s2=0;else if(a=112.5)s2=64*h/9/pow(pi,2);else if(a=180)s2=-64*h/9/pow(pi,2);else if(a=270)s2=0;else s2=-8*h*sin(change_angel(4*a-3*360)/pi;return s2;double f_x2(double s,double s1,double a,double s2,double s0)double x2;x2=s2*sin(change_angel(a)+2*s1*cos(change_angel(a)-(s0+s)*sin(change_angel(a)-e*cos(change_angel(a);return x2;double f_y2(double s,double s1,double a,double s2,double s0)double y2;y2=s2*cos(change_angel(a)-2*s1*sin(change_angel(a)-(s0+s)*cos(change_angel(a)-e*cos(change_angel(a);return y2;double f_p(double x1,doubley1,double x2,double y2)double p;p=pow(pow(x1,2)+pow(y1,2),1.5)/(x1*y2-x2*y1);return p;void main()doubley1,x2,r0=30,s0,a,s,s1,x1,s2,y2,xN,yN,xxN,yyN,aa,p,pa,temp_aa1=0,temp_aa2=0,temp_a1=0,temp_a2=0,temp_p=0,temp_ap=0;s0=f_s0(r0,e);FILE*fp=fopen(d:/he.txt,w);for(int i=0;iN;i+)a=3*i;s=f_s(a);xi=f_x(s,s0,a);yi=f_y(s,s0,a);s1=f_s1(a);x1=f_x1(s0,a,s,s1);y1=f_y1(s0,a,s,s1);xxi=f_xx(xi,x1,y1);yyi=f_yy(yi,x1,y1);aa=f_aa(r0,s,s1);/*couts0 是：s0endl;couta 是：aendl;couts 是：sendl;coutx是：xiendl;couty是：yiendl;couts是：s1endl;coutx1 是：x1endl;couty1 是：y1endl;coutxx是：xxiendl;coutyy是：yyiendl;coutaa 是：aa=270&aa_max2)r0+=oro;s0=f_s0(r0,e);i=0;continue;elseif(temp_aa2=45&aa_max1)r0+=oro;s0=f_s0(r0+oro,e);i=0;continue;elseif(temp_aa1aa)temp_aa1=aa;temp_a1=a;/s2=f_s2(a);x2=f_x2(s,s1,a,s2,s0);y2=f_y2(s,s1,a,s2,s0);p=f_p(x1,y1,x2,y2);/if(p=p_min)pa=fabs(p)-rt;if(temp_ppa)temp_p=pa;temp_ap=a;elser0+=oro;s0=f_s0(r0,e);i=0;continue;/end if/end for/输出coutamin=temp_p;coutamin=temp_ap;cout1max=temp_a1;cout1max=temp_aa1endl;cout2amax=temp_a2;cout2max=temp_aa2;coutr0=r0;cout=a;couts=sendl;fprintf(fp,%lf,temp_p);fprintf(fp,%c,);fprintf(fp,%lf,temp_ap);fprintf(fp,%c,);fprintf(fp,%lf,temp_a1);fprintf(fp,%c,);fprintf(fp,%lf,temp_aa1);fprintf(fp,%c,);fprintf(fp,%lf,temp_a2);fprintf(fp,%c,);fprintf(fp,%lf,temp_aa2);fprintf(fp,%c,);fprintf(fp,%lf,r0);fprintf(fp,%c,);fprintf(fp,%lf,a);fprintf(fp,%c,);fprintf(fp,%lf,s);fprintf(fp,%c,n);for(i=0;iN;i+)coutxi=xi;coutyi=yi;coutxi=xxi;coutyi=yyi endl;fprintf(fp,%lf,xi);fprintf(fp,%c,);fprintf(fp,%lf,yi);fprintf(fp,%c,);fprintf(fp,%lf,xxi);fprintf(fp,%c,);fprintf(fp,%lf,yyi);fprintf(fp,%c,n);理论轮廓线和实际轮廓线坐标值理论轮廓线xy5 529.58039929.5803996.54126629.278188.06460328.8957129.56583628.43404311.04084927.89443812.485627.27837613.89612826.58754615.26856925.82384216.59915924.98935617.88425324.08637619.12032623.11737720.30399322.08501521.43200720.99211922.50127819.84168623.50887418.63686824.45203417.38096725.34872416.09593126.22085514.79943327.07132713.48813127.90249112.15827428.7161110.80575229.5133279.42616130.2946338.01485931.0598436.56703231.8080835.07776232.5377693.54208933.2466061.95508233.9315820.3119134.588975-1.39209335.214359-3.16135435.802621-4.99999936.347984-6.91177836.84403-8.90000437.283731-10.967487实际轮廓线x3.3333333.3333334.3608445.3764026.3772247.3605668.3237339.26408610.17904611.06610611.92283512.74688413.53599514.28800515.00085215.67258316.30135617.09887917.87676218.63622619.3780820.10273920.81024121.50026722.17214422.82484723.45698424.06678124.65205225.2101725.73803526.23204226.68805927.10140827.466854y19.72026619.72026619.51878719.26380818.95602918.59629218.18558417.72503117.21589516.65957116.05758415.41158514.72334313.99474613.22779112.42457811.58731110.4443789.287988.1169976.930045.7254144.5010933.2546971.9834950.684418-0.645911-2.011127-3.415063-4.86168-6.354988-7.898967-9.497478-11.154184-12.87246337.65949137.96318638.18620938.31952838.34110538.1682437.78635137.19516736.39580435.39074734.18382632.78018331.18623229.40961227.45913525.34472623.07735920.66898518.1324615.48145912.7303989.8943416.9889084.0301851.034621-1.981067-4.999997-8.00667-10.991397-13.945997-16.862373-19.73253-22.548601-25.302869-27.987782-30.595984-33.120324-35.553883-37.889991-40.122246-42.244529-44.251022-46.136226-13.116474-15.348585-17.664761-20.065212-22.54374-25.059319-27.589461-30.116639-32.623437-35.092657-37.507416-39.851248-42.108199-44.262921-46.300761-48.207843-49.971153-51.578608-53.019132-54.282713-55.360468-56.244689-56.928887-57.407836-57.677598-57.73555-57.580399-57.239808-56.742326-56.089317-55.282572-54.3243-53.21713-51.964095-50.56863-49.03456-47.36609-45.567793-43.644597-41.601775-39.444925-37.17996-34.81308627.77860428.03031628.21511728.32562928.34488228.22793127.96611827.55566926.99420626.28074525.41568324.40076723.23905621.93487420.49375118.92236717.22847415.4208313.50911311.5038419.4162847.2583715.0425972.7819240.489686-1.820513-4.134902-6.621363-9.089675-11.533073-13.94486-16.318425-18.647262-20.924988-23.145361-25.302293-27.389874-29.402381-31.334298-33.18033-34.935417-36.594749-38.153777-14.655327-16.505347-18.424576-20.41448-22.268936-23.96833-25.701864-27.455797-29.216099-30.968597-32.699123-34.393648-36.038405-37.620008-39.125565-40.542773-41.860015-43.066448-44.152077-45.107826-45.925605-46.598359-47.120122-47.48605-47.692457-47.736839-47.617889-47.336226-46.924818-46.384793-45.717629-44.925157-44.009549-42.973313-41.81929-40.550644-39.170851-37.683693-36.093247-34.403872-32.620199-30.747116-28.789757-47.894974-49.522445-51.014179-52.366086-53.574462-54.635994-55.547772-56.307298-56.912489-57.361687-57.653661-57.78761-57.763167-57.580399-57.233009-56.688512-55.910911-54.870157-53.544447-51.92201-50.002263-47.796258-45.326397-42.625441-39.734872-36.702723-33.581025-30.423042-27.280465-24.20077-21.224897-18.385408-15.705234-13.197091-10.863595-8.698048-6.685845-4.806377-3.035306-1.3470370.2827881.8749573.44467-32.350793-29.799828-27.167184-24.460076-21.685925-18.852335-15.967071-13.038043-10.073279-7.080904-4.069122-1.0461861.9796184.9999958.00631210.98573913.91773916.7747119.52356722.1277924.5497926.75344128.70657930.38330731.76593932.84642333.6271734.12118834.35152734.35005534.15563833.81184633.36432632.85802632.33444431.82909531.36935330.97283630.6464230.38596930.17679329.99481129.808339-39.608228-40.954115-42.187751-43.305752-44.305056-45.182922-45.936945-46.565058-47.06554-47.437018-47.678475-47.789248-47.769034-47.617889-47.338962-46.925061-46.364858-45.651149-44.77881-43.74256-42.535706-41.15081-39.582322-37.830192-35.902947-33.819035-31.60606-29.298246-26.932859-24.546307-22.1705-19.829843-17.539197-15.303082-13.116603-10.968734-8.848605-6.754521-4.703012-2.732359-0.8959420.7521092.169929-26.753487-24.643888-22.466741-20.228015-17.933846-15.59052-13.204463-10.782213-8.330409-5.855773-3.365086-0.8651761.6371064.1349016.5544738.82355710.93900512.9004514.71070816.37482617.89768419.28095720.52088421.60802522.52925423.27122923.82413524.18464824.3575724.35602624.20044723.91671523.53393523.08230122.59155222.09030721.6060321.16443520.78646320.4823920.24650620.0580519.88992回程最大压力角=111对应的转角是：0.491759推程最大压力角=321.000000对应的转角是：0.702142实际轮廓线的最小曲率半径=0.000000对应的转角是：0.000000基圆半径=30.000000对应的转角是：357.000000四、体会及体会此次凸轮机构的设计，使我对解析法设计凸轮机构有了更深的理解，同时也意识到解析法设计凸轮的准确性。我发现了计算机辅助设计的方便，同时也意识到 C 语言的重要性。设计过程中一定要细心，遇到困难要及时和同学交流，共同商量解决方案。五、参考书1、机械原理第七版主编：孙桓陈作模葛文杰2、C 语言程序设计基础主编：王载新 曾大亮 杨有安3、AUTOCAD 2004 中文版教程主编：刘瑞新六、凸轮轮廓线