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3#
楼主 |
发表于 2006-5-23 18:03:33
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只看该作者
Re: 请教怎么用autocad 画渐开线!
4 O# }$ b" y- `1 W* r! l(defun C:jkx ()
& X+ v( J- r; O8 p4 [(setq pi1 (/ pi 180))' ]6 k+ v7 E, s& \ j
(setq po0 (getpoint " \n 请输入中心点:"))
v9 I8 u0 K$ W# `& f# N# ?5 n# p$ \6 d(if (= po0 nil)- h0 ]1 q& s. M2 N
(setq po0 (list 0 0 0))
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(SETQ d (GETREAL "\n 请输入分度圆直径:"))- N, A# n8 m. k: n6 w8 [3 W+ ?$ j
(if (= d nil)
6 z" L% |+ c n( ]$ P! ?1 _- J9 o(setq d 100)
3 Q0 K# G+ J; q6 R)
0 }* k+ c* w" n( c1 D& \. ~9 d5 F(setq step (getreal "\n 渐开线精细度(0<精细度<=10):"))# X! D7 S4 g F, @0 ?* e4 b0 c* y
(if (= step nil)
# L' c. P8 \5 b+ W(setq step 1)4 ^( F; Y9 K% S3 ^
)
7 A: Y O2 o* \; V(setq rd (/ d 2))
8 C0 ^' p+ U- u, l(setq os (getver "osmode"))' `" O9 \8 T1 S9 U4 z
(setvar "osmode" 0)
7 h- n1 f% u+ l4 b: ~(command "UCS" "OR" po0)
$ \8 J4 B+ p D" f" X(command "CIRCLE" "0,0" rd)# k% `3 e0 X7 L6 p4 |; H( a+ `
(SETQ R (* rd (COS (* PI1 20)))) ;标准齿轮分度圆的压力角为20度2 N8 R, W$ i+ h" j0 J! K- C
(SETQ ST 0)0 @5 f& `& q& r' `0 b+ D
(SETQ STR (* PI1 ST))
7 P+ I* ]- B) {* | P7 ]% ], L9 }(SETQ X (* R (+ (COS STR) (* STR (SIN STR)))))8 c* y$ A# \$ d$ `: {, {
(SETQ Y (* R (- (SIN STR) (* STR (COS STR)))))5 `4 I) i7 w8 X9 O2 c
(SETQ XY (LIST X Y)); s2 x" V4 k9 X( n
(COMMAND "PLINE" XY)
5 G& [5 J0 i, P(SETQ ST (+ st step))
- k8 @9 l0 T( y) R+ k2 f7 q$ N(WHILE (<= ST 80) ;齿轮上的渐开线压力角不会超过80度
4 C f$ v% C9 u0 g* \# ^9 R(SETQ STR (* PI1 ST))4 _$ Y9 [" k4 J2 ~
(SETQ X (* R (+ (COS STR) (* STR (SIN STR))))): Q8 }. ~2 o4 J9 ]! a9 J
(SETQ Y (* R (- (SIN STR) (* STR (COS STR)))))- ^$ M" n# O* P0 e3 @4 @; [1 g
(SETQ XY (LIST X Y)): `1 H- [4 D- [! [
(COMMAND XY)
3 F/ y0 X/ ~& g& B3 u(SETQ ST (+ st step))
% i- |, a, F- U)
) \1 U9 R$ C/ z" Y+ l0 T2 A' n6 w(command "")
. U( b6 Z% i8 e: c, f: d(setvar "osmode" os): {# V6 r) D: s. ]' L
(command "UCS" "P")
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* } T/ _% ~' j% s3 @有人用autolisp写的,不知道怎么用,能给点提示吗? |
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