本文系全自动[GAD]齿轮设计软件之内容,限于篇幅,未包含功率部份, 符合ISO.9085 渐开线园柱齿轮标准。 @H<*|3J
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本程序适用于: 速比 u < 4, 求取最大功率, 而且 $C sE[+k1
一般不发生切削干涉与啮合干涉。 O5aXa_A_u
当速比 2 > u > 4 尚需作局部修正 ]
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己知: 产品的工作条件: 中心距 [A`] , 速比 [u] j!w{
步骤00 1 起步假设 [Z1齿 经验值] haY]gmC
if ( u <=1.25 )Z1 =41.0 %S"85#R5E
if ( u >1.25 .and. u <=1.50 ) Z1 = 37.0 2lO(f+
if ( u >1.50 .and. u <=1.75 ) Z1 = 33.0 641P)
if ( u >1.75.and. u <=2.00 ) Z1 = 28.0 14"57Jt8
if ( u >2.00 .and. u <=2.50 ) Z1 = 25.0 P%)r4+at
if ( u >2.50 .and. u <=3.00 ) Z1 = 23.0 t,Ka]
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if ( u >3.00 .and. u <=3.50 ) Z1 = 21.0 <gFa@at
if ( u >3.50 .and. u <=4.00)Z1 = 19.0 ^Fh*9[Zf$
if ( u >4.00 .and. u <=4.50 ) Z1 = 18.0 J8!2Tt
if ( u >4.50 .and. u <=5.00) Z1 = 17.0 :dh; @kp
if ( u >5.00 .and. u <5.50 )Z1 = 16.0 lOp.cU
if ( u >5.50 .and. u <6.00 )Z1 = 15.0 I8YUq
if ( u >6.00 ) Z1 = 14.0 SAdE9L =d
Z1 = Z1 bD0l^?Hu!
Z2 = int ( Z1 * u +0.50 ) 取整数 -2; 6Pwmv
u = Z2/ Z1 yKoZj
齿 数 比[ u] ≡ u K6t"98
步骤002起步假设螺旋角 [ β 经验值 ] '.1P\>x!]
if ( u <=1.25 )β= 24.0 e`s1z|h
if ( u >1.25 .and. u <=1.50 ) β= 22.0 $3PDe
if ( u >1.50 .and. u <=1.75 ) β= 20.0 W-l+%T!
if ( u >1.75. and. u <=2.00 ) β= 18.0 *d3-[HwZCL
if ( u >2.00 .and. u <=2.50 ) .β= 16.0 y $\tqQ
if ( u >2.50 .and. u <=3.00 ) β= 14.0 = V2Rq(jH
if ( u >3.00 .and. u <=3.50 ) β= 12.0 K<wFr-z
if ( u >3.50 .and. u <=4.00) β= 11.0 50QDqC-]XS
if ( u >4.00 .and. u <=4.50 ) .β= 10.0 @t~y9UfF
if ( u >4.50 .and. u <=5.00) β= 10.0 h AAh
if ( u >5.00 .and. u <5.50 )β= 9.0 mLqqo2u
if ( u >5.50 .and. u <6.00 )β= 7.0 v>#Njgo
if ( u >6.00 ) β= 6.0 P,ueLG=
β= bff N?ccG\t
jtt = Atan ( tand (20) /Cos( bff) ) 3fhY+$tq
压力角 [初值][αt] = jtt {KNaJ/:>W
步骤003 导出 [Axi] 几何性能综合参数概念 (<r)xkn
令 [Axi] ≡ Cos(αt) / [ 2*Cos(β)*Cos(α`) ] xy7A^7Li
此系数综合包含螺旋角. 压力角. 啮合角因子, 意义很重要 7%i'F=LzT
中心距 [A`] ≡ Mn *Z1 *(1+u) *Axi B`Z3e%g#
常规采用 [V+] 变位体制齿轮 [V-变位制不利于强度] Tc/^h4xH
Axi* Cos(β)≥ 0.5; Axi ≥ 0.5 / Cos(β) }[;ZZm?
β= 5, Axi≥ 0.5019 β=10, Axi≥ 0.5077 JFVx&
β=15, Axi≥ 0.5176 β=20, Axi≥ 0.5320 n2bhCd]j<b
β=22, Axi≥ 0.5392 β=24, Axi≥ 0.5473 L@{'J
故 [Axi]max = 0 .5473, [Axi]min = 0.5019 &liON1GLM
步骤004 计算 模 数 "D
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[Mn]min ≌ A`/ ( Z1*(1+u)*0 .5473 ) X|T|iB,vT
[Mn]max ≌ A`/ ( Z1*(1+u)*0 .5019 )
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将模 数化为标 准 值 [Mn]≡,Mn (s,&