机械原理大作业凸轮(共13页)

1、机械(jxi)原理大作业二课程名称： 设计(shj)题目： 院 系： 班 级： 设 计 者： 学 号： 指导(zhdo)教师： 一、设计(shj)题目图1 凸轮(tln)机构设计表1 设计(shj)要求升程/mm升程运动角/。升程运动规律升程许用压力角/。回程运动角/。回程运动规律回城许用压力角/。远休止角/。近休止角/。6590等加等减速3550改进正弦70100120二、凸轮推杆运动规律分析1、升程运动规律（等加等减速） 推程： 2、远休止运动规律远休止： 3、回程运动(yndng)规律（改进正弦加速度）回程(huchng)： 4、近休止(xizh)运动规律近休止： 三、编程及代码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线图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 在轴心公共许用区内取轴心位置(wi zhi)，能够满足压力角要求，现取直线Dtdt 与直线(zhxin)Dtdt的交点为轴心位置，通过解二元一次方程组，可以(ky)求得, 可取：偏距e=75, 基圆半径=122mm3、压力角线图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)半径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、理论(lln)轮廓与实际轮廓h=65;e=75;s0=96;n=8;%滚子(n z)直径取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/