機(jī)械原理大作業(yè)凸輪(共13頁(yè))

1、機(jī)械(jxi)原理大作業(yè)二課程名稱(chēng)： 設(shè)計(jì)(shj)題目： 院 系： 班 級(jí)： 設(shè) 計(jì) 者： 學(xué) 號(hào)： 指導(dǎo)(zhdo)教師： 一、設(shè)計(jì)(shj)題目圖1 凸輪(tln)機(jī)構(gòu)設(shè)計(jì)表1 設(shè)計(jì)(shj)要求升程/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/?；爻踢\(yùn)動(dòng)規(guī)律回城許用壓力角/。遠(yuǎn)休止角/。近休止角/。6590等加等減速3550改進(jìn)正弦70100120二、凸輪推桿運(yùn)動(dòng)規(guī)律分析1、升程運(yùn)動(dòng)規(guī)律（等加等減速） 推程： 2、遠(yuǎn)休止運(yùn)動(dòng)規(guī)律遠(yuǎn)休止： 3、回程運(yùn)動(dòng)(yndng)規(guī)律（改進(jìn)正弦加速度）回程(huchng)： 4、近休止(xizh)運(yùn)動(dòng)規(guī)律近休止： 三、編程及代碼1、位移

2、、速度、加速度t=0:0.01:pi/4;s=2*65*(2*t/pi).2);hold onplot(t,s);t=pi/4:0.01:pi/2;s=65-2*65*(pi/2-t)/(pi/2).2);hold onplot(t,s);t=pi/2:0.01:pi*19/18;s=65*ones(size(t);hold onplot(t,s);t=19*pi/18:0.01:196.25*pi/180;s=65-65*(pi*(t-19*pi/18)/(5*pi/18)-sin(4*(pi*(t-19*pi/18)/(5*pi/18)/4)/(4+pi);hold onplot(t,s)

3、;t=196.25*pi/180:0.01:233.75*pi/180;s=65-65*(2+(pi*(t-19*pi/18)/(5*pi/18)-9*sin(pi/3+4*(pi*(t-19*pi/18)/(15*pi/18)/4)/(4+pi);hold onplot(t,s);t=233.75*pi/180:0.01:24*pi/18;s=65-65*(4+(pi*(t-19*pi/18)/(5*pi/18)-sin(4*(pi*(t-19*pi/18)/(5*pi/18)/4)/(4+pi);hold onplot(t,s)t=24*pi/18:0.01:2*pi;s=0*ones(s

4、ize(t);hold onplot(t,s);grid onhold offt=0:0.01:pi/4;v=4*65*2*t/(pi*pi/4);hold onplot(t,v);t=pi/4:0.01:pi/2;v=4*65*2*(pi/2-t)/(pi*pi/4);hold onplot(t,v);t=pi/2:0.01:pi*19/18;v=0*ones(size(t);hold onplot(t,v);t=19*pi/18:0.01:196.25*pi/180;v=-65*pi*2*(1-cos(4*pi*(t-19*pi/18)/(5*pi/18)/(4+pi)*(5*pi/18)

5、;hold onplot(t,v);t=196.25*pi/180:0.01:233.75*pi/180;v=-65*pi*2*(1-3*cos(pi/3+4*pi*(t-19*pi/18)/(3*5*pi/18)/(4+pi)*(5*pi/18);hold onplot(t,v);t=233.75*pi/180:0.01:24*pi/18;v=-65*pi*2*(1-cos(4*pi*(t-19*pi/18)/(5*pi/18)/(4+pi)*(5*pi/18);hold onplot(t,v)t=24*pi/18:0.01:2*pi;v=0*ones(size(t);hold onplot

6、(t,v);grid onhold offt=0:0.01:pi/4;s=4*65*4/(pi*pi/4)*ones(size(t);hold onplot(t,s);t=pi/4:0.01:pi/2;s=-4*65*4/(pi*pi/4)*ones(size(t);hold onplot(t,s);t=pi/2:0.01:pi*19/18;s=0*ones(size(t);hold onplot(t,s);t=19*pi/18:0.01:196.25*pi/180;s=-4*65*pi*pi*4*sin(4*pi*(t-19*pi/18)/(5*pi/18)/(4+pi)*(5*pi/18)

7、.2);hold onplot(t,s);t=196.25*pi/180:0.01:233.75*pi/180;s=-4*65*pi*pi*4*sin(pi/3+4*pi*(t-19*pi/18)/(15*pi/18)/(4+pi)*(5*pi/18).2);hold onplot(t,s);t=233.75*pi/180:0.01:24*pi/18;s=-4*65*pi*pi*4*sin(4*pi*(t-19*pi/18)/(5*pi/18)/(4+pi)*(5*pi/18).2);hold onplot(t,s)t=24*pi/18:0.01:2*pi;s=0;hold onplot(t,

8、s);grid onhold off2、d/ds s線(xiàn)圖t=0:0.01:pi/4;s=2*65*(2*t/pi).2);v=4*65*2*t/(pi*pi/4);hold onplot(v,s);t=pi/4:0.01:pi/2;s=65-2*65*(pi/2-t)/(pi/2).2);v=4*65*2*(pi/2-t)/(pi*pi/4);hold onplot(v,s);t=pi/2:0.01:pi*19/18;s=65*ones(size(t);v=0*ones(size(t);hold onplot(v,s);t=19*pi/18:0.01:196.25*pi/180;s=65-65

9、*(pi*(t-19*pi/18)/(5*pi/18)-sin(4*(pi*(t-19*pi/18)/(5*pi/18)/4)/(4+pi);v=-65*pi*2*(1-cos(4*pi*(t-19*pi/18)/(5*pi/18)/(4+pi)*(5*pi/18);hold onplot(v,s);t=196.25*pi/180:0.01:233.75*pi/180;s=65-65*(2+(pi*(t-19*pi/18)/(5*pi/18)-9*sin(pi/3+4*(pi*(t-19*pi/18)/(15*pi/18)/4)/(4+pi);v=-65*pi*2*(1-3*cos(pi/3+

10、4*pi*(t-19*pi/18)/(3*5*pi/18)/(4+pi)*(5*pi/18);hold onplot(v,s);t=233.75*pi/180:0.01:24*pi/18;s=65-65*(4+(pi*(t-19*pi/18)/(5*pi/18)-sin(4*(pi*(t-19*pi/18)/(5*pi/18)/4)/(4+pi);v=-65*pi*2*(1-cos(4*pi*(t-19*pi/18)/(5*pi/18)/(4+pi)*(5*pi/18);hold onplot(v,s)t=24*pi/18:0.01:2*pi;s=0*ones(size(t);v=0*ones

11、(size(t);hold onplot(v,s);t=pi/4;s=2*65*(2*t/pi).2);v=4*65*2*t/(pi*pi/4);k=tan(55*pi/180);b=s-k*v;n=0:1:170;m=k*n+b;hold onplot(n,m);t=219.83*pi/180;s=65-65*(2+(pi*(t-19*pi/18)/(5*pi/18)-9*sin(pi/3+4*(pi*(t-19*pi/18)/(15*pi/18)/4)/(4+pi);v=-65*pi*2*(1-3*cos(pi/3+4*pi*(t-19*pi/18)/(3*5*pi/18)/(4+pi)*

12、(5*pi/18);k=tan(160*pi/180);b=s-k*v;n=-265:1:170;m=k*n+b;hold onplot(n,m);k=tan(55*pi/180);n=0:1:170;m=-k*n;hold onplot(n,m);grid onhold off 在軸心公共許用區(qū)內(nèi)取軸心位置(wi zhi)，能夠滿(mǎn)足壓力角要求，現(xiàn)取直線(xiàn)Dtdt 與直線(xiàn)(zhxin)Dtdt的交點(diǎn)為軸心位置，通過(guò)解二元一次方程組，可以(ky)求得, 可取：偏距e=75, 基圓半徑=122mm3、壓力角線(xiàn)圖t=0:0.01:pi/4;s=2*65*(2*t/pi).2);v=4*65*2*t/(

13、pi*pi/4);a=atan(abs(v-75)./(60+s);hold onplot(t,a);t=pi/4:0.01:pi/2;s=65-2*65*(pi/2-t)/(pi/2).2);v=4*65*2*(pi/2-t)/(pi*pi/4);a=atan(abs(v-75)./(60+s);hold onplot(t,a);t=pi/2:0.01:pi*19/18;s=65*ones(size(t);v=0*ones(size(t);a=atan(abs(v-75)./(60+s);hold onplot(t,a);t=19*pi/18:0.01:196.25*pi/180;s=65-

14、65*(pi*(t-19*pi/18)/(5*pi/18)-sin(4*(pi*(t-19*pi/18)/(5*pi/18)/4)/(4+pi);v=-65*pi*2*(1-cos(4*pi*(t-19*pi/18)/(5*pi/18)/(4+pi)*(5*pi/18);a=atan(abs(v-75)./(60+s);hold onplot(t,a);t=196.25*pi/180:0.01:233.75*pi/180;s=65-65*(2+(pi*(t-19*pi/18)/(5*pi/18)-9*sin(pi/3+4*(pi*(t-19*pi/18)/(15*pi/18)/4)/(4+pi

15、);v=-65*pi*2*(1-3*cos(pi/3+4*pi*(t-19*pi/18)/(3*5*pi/18)/(4+pi)*(5*pi/18);a=atan(abs(v-75)./(60+s);hold onplot(t,a);t=233.75*pi/180:0.01:24*pi/18;s=65-65*(4+(pi*(t-19*pi/18)/(5*pi/18)-sin(4*(pi*(t-19*pi/18)/(5*pi/18)/4)/(4+pi);v=-65*pi*2*(1-cos(4*pi*(t-19*pi/18)/(5*pi/18)/(4+pi)*(5*pi/18);a=atan(abs

16、(v-75)./(60+s);hold onplot(t,a);t=24*pi/18:0.01:2*pi;s=0*ones(size(t);v=0*ones(size(t);a=atan(abs(v-75)./(60+s);hold onplot(t,a);grid onhold off4、曲率(ql)半徑r=122;t=0:0.01:pi/4;s=2*65*(2*t/pi).2);a=4*65*4/(pi*pi/4)*ones(size(t);w=r+s+a;hold onplot(t,w);t=pi/4:0.01:pi/2;s=65-2*65*(pi/2-t)/(pi/2).2);a=-4

17、*65*4/(pi*pi/4)*ones(size(t);w=r+s+a;hold onplot(t,w);t=pi/2:0.01:pi*19/18;s=65*ones(size(t);a=0*ones(size(t);w=r+s+a;hold onplot(t,w);t=19*pi/18:0.01:196.25*pi/180;s=65-65*(pi*(t-19*pi/18)/(5*pi/18)-sin(4*(pi*(t-19*pi/18)/(5*pi/18)/4)/(4+pi);a=-4*65*pi*pi*4*sin(4*pi*(t-19*pi/18)/(5*pi/18)/(4+pi)*(5

18、*pi/18).2);w=r+s+a;hold onplot(t,w);t=196.25*pi/180:0.01:233.75*pi/180;s=65-65*(2+(pi*(t-19*pi/18)/(5*pi/18)-9*sin(pi/3+4*(pi*(t-19*pi/18)/(15*pi/18)/4)/(4+pi);a=-4*65*pi*pi*4*sin(pi/3+4*pi*(t-19*pi/18)/(15*pi/18)/(4+pi)*(5*pi/18).2);w=r+s+a;hold onplot(t,w);t=233.75*pi/180:0.01:24*pi/18;s=65-65*(4+

19、(pi*(t-19*pi/18)/(5*pi/18)-sin(4*(pi*(t-19*pi/18)/(5*pi/18)/4)/(4+pi);a=-4*65*pi*pi*4*sin(4*pi*(t-19*pi/18)/(5*pi/18)/(4+pi)*(5*pi/18).2);w=r+s+a;hold onplot(t,w);t=24*pi/18:0.01:2*pi;s=0*ones(size(t);a=0;w=r+s+a;hold onplot(t,w);grid onhold off5、理論(lln)輪廓與實(shí)際輪廓h=65;e=75;s0=96;n=8;%滾子(n z)直徑取8mmt=0:0

20、.01:pi/4;s=2*65*(2*t/pi).2);x=-(s0+s).*sin(t)-e.*cos(t);y=(s0+s).*cos(t)-e.*sin(t);dx=-(s0+s).*cos(t)+e*sin(t);dy=-(s0+s).*sin(t)-e*cos(t);x1=x-n.*dy./(sqrt(dx.2+dy.2);y1=y+n.*dx./(sqrt(dx.2+dy.2);hold onplot(x,y,x1,y1);t=pi/4:0.01:pi/2;s=65-2*65*(pi/2-t)/(pi/2).2);x=-(s0+s).*sin(t)-e.*cos(t);y=(s0+

21、s).*cos(t)-e.*sin(t);dx=-(s0+s).*cos(t)+e*sin(t);dy=-(s0+s).*sin(t)-e*cos(t);x1=x-n.*dy./(sqrt(dx.2+dy.2);y1=y+n.*dx./(sqrt(dx.2+dy.2);hold onplot(x,y,x1,y1);t=pi/2:0.01:pi*19/18;s=65*ones(size(t);x=-(s0+s).*sin(t)-e.*cos(t);y=(s0+s).*cos(t)-e.*sin(t);dx=-(s0+s).*cos(t)+e*sin(t);dy=-(s0+s).*sin(t)-e

22、*cos(t);x1=x-n.*dy./(sqrt(dx.2+dy.2);y1=y+n.*dx./(sqrt(dx.2+dy.2);hold onplot(x,y,x1,y1);t=19*pi/18:0.01:196.25*pi/180;s=65-65*(pi*(t-19*pi/18)/(5*pi/18)-sin(4*(pi*(t-19*pi/18)/(5*pi/18)/4)/(4+pi);x=-(s0+s).*sin(t)-e.*cos(t);y=(s0+s).*cos(t)-e.*sin(t);dx=-(s0+s).*cos(t)+e*sin(t);dy=-(s0+s).*sin(t)-e

23、*cos(t);x1=x-n.*dy./(sqrt(dx.2+dy.2);y1=y+n.*dx./(sqrt(dx.2+dy.2);hold onplot(x,y,x1,y1);t=196.25*pi/180:0.01:233.75*pi/180;s=65-65*(2+(pi*(t-19*pi/18)/(5*pi/18)-9*sin(pi/3+4*(pi*(t-19*pi/18)/(15*pi/18)/4)/(4+pi);x=-(s0+s).*sin(t)-e.*cos(t);y=(s0+s).*cos(t)-e.*sin(t);dx=-(s0+s).*cos(t)+e*sin(t);dy=-(s0+s).*sin(t)-e*cos(t);x1=x-n.*dy./(sqrt(dx.2+dy.2);y1=y+n.*dx./(sqrt(dx.2+dy.2);hold onplot(x,y,x1,y1);t=233.75*pi/180:0.01:24*pi/18;s=65-65*(4+(pi*(t-19*pi/