ֱԲ׶ָƺǿУ(8-210)

ʼ:
6ֱ׶ִ.
СִݵתT1:  T1=140  ;N?M
Сת:n1=960 ;r/min
ת:n2=325 ;r/min
ύ:=90
С:20Cr,̼,,Ӳ58~63HRC.
:20Cr,̼,,Ӳ58~63HRC.
ֲڶ:Rz1=3.2  ;m
           Rz2=3.2  ;m
С֧,֧.
100мѹ,ֳڹ.

:
1.:
ƹʽ:dc1R1951*(K*T1/U/HP/HP)^(1/3)
غϵ:K=1.5
:u=n1/n2
ʱĳýӴӦ:HP=1300/1.1 ;MPa,HP=Hlim/Sh
;ʽ,ֵĽӴƣǿȼަHlim=1300MPa.(8.2-16h)
;ʱİȫϵSh=1.1.
:
dc1min=1951*(K*T1/U/HP/HP)^(1/3) ;mm,dc1Rdc1min
2.μ:
:
ȡ:z1=21
z2=trunc(u*z1)  ;ȡ.
ʵʳ:u=z2/z1
׶:
1=atan(z1/z2)
2=atan(z2/z1)
ģ:Mc=dc1min/z1
ȡ: Mc=3.5 ;8.4-3

˷ֶԲֱ:dc1=z1*Mc
              dc2=z2*Mc
׶:Rc=dc1/2/sin(1)
ݿϵ,ȡ:R=0.3
ݿ:b=trunc(R*Rc)
ʵʳݿϵ:R=b/Rc
еģ: Mm=Mc*(1-0.5*R)
еֶԲֱ:dm1=dc1*(1-0.5*R)
               dm2=dc2*(1-0.5*R)
λϵ:t1=0
t2=0
߶ȱλϵ:1=0
2=0
cr=0.2 ;(GB12369-1990cr=0.2)
϶:c=cr*Mc
˳ݶ:ha1=(1+1)*Mc
ha2=ha1
˳ݸ:hf1=(1+cr-1)*Mc
hf2=(1+cr-2)*Mc
ȫݸ:h=(2+cr)*Mc
ݸ:f1=atan(hf1/Rc)
f2=atan(hf2/Rc)
ݶ:
a1=f2
a2=f1  ;(õȶ϶)
׶:
a1=1+a1
a2=2+a2
׶:
f1=1-f1
f2=2-f2
˳ݶԲֱ:
dac1=dc1+2*ha1*cos(1)
dac2=dc2+2*ha2*cos(2)
װ:
A1=120.179
A2=105
ڶ:
Ak1=dc2/2-ha1*sin(1)
Ak2=dc1/2-ha2*sin(2)
˷ֶԲݺ:
=20
s1=Mc*(pi/2+2*1*tang()+t1)
s2=pai*Mc-s1
˷ֶԲҳݺ:
s1_=s1*(1-s1*s1/(6*dc1*dc1))
s2_=s2*(1-s2*s2/(6*dc2*dc2))
˷ֶԲҳݸ:
h1_=ha1+s1*s1*cos(1)/4/dc1
h2_=ha2+s2*s2*cos(2)/4/dc2
:
zv1=z1/cos(1)
zv2=z2/cos(2)
ֶַԲֱ:
dv1=dm1*sqrt(u*u+1)/u
dv2=dv1*u*u
ֶԲֱ:
dva1=dv1+2*1*Mm  ;=dv1+2*ha
dva2=dv2+2*1*Mm  ;=dv2+2*ha
ָԲֱ:
dvb1=dv1*cos()
dvb2=dv2*cos()
ִľ:
av=1/2*(dv1+dv2)
ֻԲݾ:
pvb=pi*Mm*cos()
߳:
vt=20
gva=1/2*(sqrt(dva1*dva1-dvb1*dvb1)+sqrt(dva2*dva2-dvb2*dvb2))-av*sin(vt)
غ϶:
v=gva/pvb
вӴ߳:
lbm=2*b*sqrt(v-1)/v
вӴߵͶӰ:
lbm1=lbm

ӴƣǿУ

еֶԲ:
Ft=2000*T1/dm1
ʹϵ:
Ka=1.25  ;ɱ8.2-29
ϵKv    
еٶ:v=pai*dm1*n1/60/1000
Kv=1.045  ;6ȺеٶȲ8.4-28
غɷֲϵ:
ɱ8.4-30,ȡ:Kh0=1.1
Kh=1.5*Kh0  ;Чݿbe>0.85*b,8.4-2
غϵ:
;Ft/be=.Ft/b
l=Ft/b
Kha=1.0 ;Ft/be>100N/mm,ɱ8.4-32
ڵϵ:
Zh=2.5  ;ͼ8.4-29
еϵ:
F1=2
F2=2*(v-1)
;F1,F28.4-33.
Zm=tang(vt)/sqrt( (sqrt((dva1/dvb1)*(dva1/dvb1)-1)-pi*F1/zv1)*(sqrt((dva2/dvb2)*(dva2/dvb2)-1)-pi*F2/zv2)  )
ϵ:
Ze=189.8 ;sqrt(N/mm^2),8.2-64
ϵ:
Z=1  ;ֱ
׶ϵ:Zk=0.8 ;ʽ(8.4-8)
غɷϵ:Zls=1  ;ʽ(8.4-9)
ӴӦ:
ӴӦ:H=Zm*Zh*Ze*Zls*Z*Zk*sqrt(Ka*Kv*Kh*Kha*Ft/dm1/lbm*sqrt(u*u+1)/u)
ֵĽӴƣͼ:
Hlim=1300  ;MPa (ͼ8.2-16h)
ϵ:Znt=1  ;ڹ,ȡΪ
Ӱϵ:ZlZvZr=0.92  ;(8.4-34)
Ӳϵ:Zw=1
ߴϵ:Zx=1
Сȫϵ:SHmin=1.1
ýӴӦֵ:HP=Hlim*Znt*ZlZvZr*Zw*Zx/Shmin
;ýӴӦ:HP=Hlim*Znt*Zl*Zv*Zr*Zw*Zx/Shmin
ӴǿУ˽:
;H=904MPa<HP=1087.3MPa;ͨ.

ݸƣǿУ

ͨϵ:
Ka=1.25
Kv=1.045
Kh=1.65
Kf=Kh
Kha=1.0
Kfa=Kha
Ft=4473 ;N ,ͬǰ
ϳϵ:
Yfs1=4.72 ;Yfa1*Ysa1
Yfs2=4.2  ;Yfa2*Ysa2
;ֳ:zv1=22.172,zv2=193.263 (ͼ8.4-25)
غ϶ϵ:
Y=0.25+0.75/v ;ʽ(ͼ8.4-18)
׶ϵ:
Yk=1/4*(1+lbm1/b)^2*b/lbm1 ;ʽ(8.4-21)
غɷϵ:
Yls=Zls*Zls  ;ʽ(8.4-22)
ݸӦֵ:
;F0=Ft/b/Mm*Yfa*Ysa*Y*Yk*Yls

F0=Ft/b/Mm*Yfs1*Y*Yk*Yls
F1=F0*Ka*Kv*Kf*Kfa
F2=F1*Yfs2/Yfs1

ݸƣǿȻֵ:
FE=630  ;MPa (ͼ8.2-29)
ϵ:Ynt=1 ;ڹ,ȡΪ.
ԳݸԲϵ:
YrelT=1
ԳݸԲ״ϵ:
YRrelT=1
ߴϵ:
Yx1=1
Yx2=1
Сȫϵͳ:
SFmin=1.4
Ӧֵ:
Fp1=FE*Ynt*YrelT*YRrelT*Yx1/SFmin ;MPa
Fp2=Fp1
ݸƣǿУ˽:
F1<Fp1
F2<Fp2  ;ͨ.

