哈工大機(jī)械原理大作業(yè)凸輪結(jié)構(gòu)設(shè)計(jì)

1、專業(yè)知識(shí)分享專業(yè)知識(shí)分享HarbinInstituteofTechnology機(jī)械原理大作業(yè)二課程名稱：機(jī)械原理設(shè)計(jì)題目：凸輪結(jié)構(gòu)設(shè)計(jì)院系：機(jī)電工程學(xué)院班級(jí)：設(shè)計(jì)者：學(xué)號(hào)：指導(dǎo)教師：設(shè)計(jì)時(shí)間：哈爾濱工業(yè)大學(xué)1、設(shè)計(jì)題目序號(hào)升程（mm）升程運(yùn)動(dòng)角（。）升程運(yùn)動(dòng)規(guī)律升程許用壓力角（。）回程運(yùn)動(dòng)角（。）回程運(yùn)動(dòng)規(guī)律回程許用壓力角（。）遠(yuǎn)休止角（。）近休止角（。）350150正弦加速度40100余弦力口速度6030802、凸輪機(jī)構(gòu)推桿升程、回程運(yùn)動(dòng)方程，推桿位移、速度、加速度線圖。（1）推桿各行程運(yùn)動(dòng)方程設(shè)定角速度沏=1rad/s=2兀/s）5兀、從動(dòng)件推程運(yùn)動(dòng)方程0一）6h3v1001一cossin

2、0sin002Kh32a-1920代入數(shù)據(jù)，可得：s=50sin2.497mmv=120(1-cos24)mm/sa=576兀sin2.4qmm/s25兀、從動(dòng)件遠(yuǎn)休程運(yùn)動(dòng)方程（一兀）6s-50mm;v=a=014k、從動(dòng)件回程運(yùn)動(dòng)方程（兀）1+cos兀h3v二,1200.兀sin0r卜一。+0）兀2h32a-_lcos20,20代入數(shù)據(jù)，可得:s-2511+cosG.81.8K)mmv=90兀sinG.8一1.8兀）mm/sa=-324k2cosG.8r一1.8兀）mm/s214兀、從動(dòng)件進(jìn)休程運(yùn)動(dòng)方程（-92兀）s-v-a=0（2）、推桿位移、速度、加速度線圖推桿的位移線圖如下的的肥20推

3、桿的速度線圖如下觸并蹈線njc推桿的加速度線圖如下3、凸輪機(jī)構(gòu)的dL-s線圖，并依次確定凸輪的基圓半徑和偏d隼ds凸輪機(jī)構(gòu)的丁-s線圖如下圖所示d隼由圖中范圍選定點(diǎn)（-10，-50）為凸輪轉(zhuǎn)軸O點(diǎn)，則二、,502+102=50.99mm取基圓半徑為r=51mm，偏距e=10mm。4、滾子半徑的確定及凸輪理論廓線和實(shí)際廓線的繪制由程序計(jì)算得凸輪理論輪廓線最小曲率半徑rmin=51mm.由滾子半徑選擇范圍rrPminA,A=35mm得到滾子半徑rrV46mm.又因?yàn)橥馆喺w尺寸較小，此范圍明顯過大，故適當(dāng)減小滾子半徑，這里取半徑為rr=12mm.得到圖線為：理論曲圍殛1iJy/F1if標(biāo)輪廓g、:

4、/y:基國(guó)17X/J.f!/:/z11i;Jv/:二-120100用口-BD40-2002040BD附錄.求位移、速度、加速度的程序（matlab）functionf=tulunh=50;x1=150;t1=30;x2=100;t2=80;w=2*pi;x1=x1*pi/180;x2=x2*pi/180;t1=t1*pi/180;t2=t2*pi/180;%升程x=0:0.001:x1;s=h*(x/x1-sin(2*pi*x/x1)/(2*pi);v=h*w*(1-cos(2*pi*x/x1)/x1;a=2*pi*h*w*w*sin(2*pi*x/x1)/(x1*x1);subplot(3,

5、1,1),plot(x,s),holdonsubplot(3,1,2),plot(x,v),holdonsubplot(3,1,3),plot(x,a),holdon%遠(yuǎn)休x=x1:0.001:x1+t1;s=h;v=0;a=0;subplot(3,1,1),plot(x,s),holdonsubplot(3,1,2),plot(x,v),holdonsubplot(3,1,3),plot(x,a),holdon%回程x=x1+t1:0.001:x1+t1+x2;s=h*(1+cos(pi*(x-(x1+t1)/x2)/2;v=-pi*h*w*sin(pi*(x-(x1+t1)/x2)/(2*

6、x2);a=-pi*pi*h*w*w*cos(pi*(x-(x1+t1)/x2)/(2*x2*x2);subplot(3,1,1),plot(x,s),holdonsubplot(3,1,2),plot(x,v),holdonsubplot(3,1,3),plot(x,a),holdon%近休x=x1+t1+x2:0.001:x1+x2+t1+t2;s=0;v=0;a=0;subplot(3,1,1),plot(x,s),xlabel(/rad),ylabel(S/mm),title(位移-轉(zhuǎn)角圖線),holdonsubplot(3,1,2),plot(x,v),xlabel(/rad),yl

7、abel(v/(mm/s),title(速度-轉(zhuǎn)角圖線),holdonsubplot(3,1,3),plot(x,a),xlabel(/rad),ylabel(a/(mm/s2),title(加速度-轉(zhuǎn)角圖線)，holdonds.繪制凸輪機(jī)構(gòu)丁-s線圖dfunctionf=jiyuan;x1=150;t1=30;x2=100;t2=80;h=50;x1=x1*pi/180;x2=x2*pi/180;t1=t1*pi/180;t2=t2*pi/180;x=0:0.001:150*pi/180;%升程v/ws=h*(x/x1-sin(2*pi*x/x1)/(2*pi);k=-h*(1-cos(2*

8、pi*x/x1)/x1;plot(k,s,r),holdon;x=180*pi/180:0.001:280*pi/180;%回程v/ws=h*(1+cos(pi*(x-(x1+t1)/x2)/2;k=pi*h*sin(pi*(x-(x1+t1)/x2)/(2*x2);plot(k,s,g),holdon;%回程切線fori=-11:1:-11;f=(k)k*tan(pi/6)+i;k=-40:0.1:50;s=f(k);plot(k,s),holdon;end%升程切線fori=-45:0.2:-45;f=(k)-k*tan(60*pi/180)+i;k=-40:0.1:50;s=f(k);p

9、lot(k,s),holdon;endgridonf=(k)k*tan(50*pi/180);k=-50:0.1:0;s=f(k);plot(k,s),holdonxlabel(ds/d0)；ylabel(s(0);title(類速度-位移圖線)；plot(-10,-50,o);.繪制凸輪輪廓曲線functionf=lunkuo;h=50;x1=150;t1=30;x2=100;t2=80;x1=x1.*pi./180;x2=x2.*pi./180;t1=t1.*pi./180;t2=t2.*pi./180;s0=51;e=10;rr=12;%升程x=0:pi/200:150.*pi/180;

10、s=h.*(x./x1-sin(2.*pi.*x./x1)./(2.*pi);X1=(s0+s).*cos(x)-e.*sin(x);Y1=(s0+s).*sin(x)+e.*cos(x);%實(shí)際輪廓X11=X1-(rr.*(cos(x).*(s+s0)-e.*sin(x)./(sin(x).*(s+s0)+e.*cos(x)2+(cos(x).*(s+s0)-e.*sin(x)2)(1./2);11=Y1-(rr.*(sin(x).*(s+s0)+e.*cos(x)./(sin(x).*(s+s0)+e.*cos(x)2+(cos(x).*(s+s0)-e.*sin(x)2)(1./2);p

11、lot(X1,Y1,r,X11,Y11,r),holdon;%遠(yuǎn)休x=150.*pi/180:pi/180:180.*pi/180;s=50;X2=(s0+s).*cos(x)-e.*sin(x);Y2=(s0+s).*sin(x)+e.*cos(x);X22=X2-(rr.*(cos(x).*(s+s0)-e.*sin(x)./(sin(x).*(s+s0)+e.*cos(x)2+(cos(x).*(s+s0)-e.*sin(x)2)(1./2);22=Y2-(rr.*(sin(x).*(s+s0)+e.*cos(x)./(sin(x).*(s+s0)+e.*cos(x)2+(cos(x).

12、*(s+s0)-e.*sin(x)2)(1./2);plot(X2,Y2,g,X22,Y22,g),holdon;%回程x=180.*pi/180:pi/180:280.*pi/180;s=h.*(1+cos(pi.*(x-(x1+t1)./x2)./2;X3=(s0+s).*cos(x)-e.*sin(x);Y3=(s0+s).*sin(x)+e.*cos(x);X33=X3-(rr.*(cos(x).*(s+s0)-e.*sin(x)./(sin(x).*(s+s0)+e.*cos(x)2+(cos(x).*(s+s0)-e.*sin(x)2)(1./2);33=Y3-(rr.*(sin(

13、x).*(s+s0)+e.*cos(x)./(sin(x).*(s+s0)+e.*cos(x)2+(cos(x).*(s+s0)-e.*sin(x)2)(1./2);plot(X3,Y3,k,X33,Y33,k),holdon;%近休x=280*pi/180:pi/180:2*pi;s=0;X4=(s0+s).*cos(x)-e.*sin(x);Y4=(s0+s).*sin(x)+e.*cos(x);X44=X4-(rr.*(cos(x).*(s+s0)-e.*sin(x)./(sin(x).*(s+s0)+e.*cos(x)2+(cos(x).*(s+s0)-e.*sin(x)2)(1./2);44=Y4-(rr.*(sin(x).*(s+s0)+e.*cos(x)./(sin(x).*(s+s0)+e.*cos(x)2+(cos(x).*(s