有下面一段渐开线程序：
% r7 o; d1 ]& \9 O- V" Y2 E;;;begain suprgear.lsp 1 M* v+ j7 ^- P
;*************************************************
% l0 C7 j* u( |& ~) A# M) F;SPURGEAR.LSP - a lisp program by Tony Hotchkiss 4 E" M' T2 d: Q
;------------------------------------------------- 7 Y3 \# K! H+ F0 x* @4 _
; This routine draws a spur gear using joined + B8 D4 f3 ^. x" A& L! O7 E/ H
; polylines. It lets you use any pressure angle
. A8 J, t: b1 N( |7 V; to design the gear teeth. . }5 X% t1 g+ i; z" P9 u
;*************************************************
7 f) L' }* O3 m% p, c- G+ ]- y(defun err (s)
2 P1 X# S- c0 w$ J* S, z(if (= s "Function cancelled")
7 E- v+ A# y( s+ Z' K. |8 z2 y(princ "\nSPURGEAR - cancelled: ") ; F3 e" Z" g7 y6 h+ K
(progn (princ "\nSPURGEAR - Error: ") (princ s)
. X- R l) B$ m* g: ^8 H6 Y(terpri))
$ J! |. u/ a- r2 W/ Y' }); if 0 N% y+ [& D- U. B
(resetting)
/ t3 K2 r ^; R) }2 z( m(princ "SYSTEM VARIABLES have been reset\n") 8 Y) ^ L2 a& Y* U& m. h
(princ) / v4 {& d- Q/ x" |0 P7 a
); err
0 m7 o, ^+ A, D: _4 X& Z$ D
0 y0 {/ @# c0 ^, d8 n1 j(defun setv (systvar newval)
/ X6 G2 `0 ^' h+ X4 U: ?# y* R5 m, o; F(setq x (read (strcat systvar "1"))) $ O" ^2 { _5 \. Z$ g
(set x (getvar systvar))
1 \$ B2 C1 l! L) ?4 {, X- J' p(setvar systvar newval) , o3 ?' q' {4 ~6 o, m
); setv ' v& e, ?7 |* X, B& B
- H0 }2 A* o1 [" c(defun setting () 9 o# a! a! G1 e
(setq oerr *error*) , M+ A; [4 n" [1 e0 s2 [
(setq *error* err)
' z3 c$ I2 Z4 t6 v1 T(setv "CMDECHO" 0) # t, [) w3 L9 f6 { ?% }4 i' `
(setv "BLIPMODE" 0) 4 x9 p2 U! d& _0 U; j$ {
); end of setting 5 x- n( a' t# d# g( R5 X
(defun rsetv (systvar) - R' n. Y( z5 d
(setq x (read (strcat systvar "1"))) 0 \; v* n, ?& V6 B6 l6 Q J
(setvar systvar (eval x)) m" \/ r6 i. G* e, K- l0 I* ^
); restv
% O9 c0 j, y6 t1 N& Q8 {% U(defun resetting () - b3 S' q5 C8 W/ n5 J8 y
(rsetv "CMDECHO") . }! Z. R; A, r: ~- D! q4 p2 {
(rsetv "BLIPMODE")
, s6 e/ k0 C$ C) Q! b; u$ b(setq *error* oerr)
4 O5 `. \, l: B); end of resetting
4 J4 T$ w0 v! j. I. h, M
; ^0 S2 M+ Z* |' L3 C(defun dxf (code ename) 2 |2 O- C- n2 \# z1 B% X+ A
(cdr (assoc code (entget ename)))
: l3 ` ^! N) z# B7 p# Q); dxf " U" S1 R" Y! x+ Y9 x8 o2 ?7 P, U
$ V! P1 N' Z" Q0 z
(defun spurgear (/ D N phi DO RO A B DR DB inv-plst p1
' \- l: T4 ?, ~2 ^5 dtrimcode invent p0 p curvent linent linent2 ent2 p2) 0 R6 @" I1 ^ `# [ J5 P$ ? s
(setq D (getreal "\nPitch diameter: ")
[3 y- t* c+ C6 s* UN (getint "\nNumber of teeth: ") 1 B5 e; d1 w6 d/ F( `) e1 D
phi (getreal "\nPressure angle: ")
# i8 r6 Z2 c4 e% U/ `* M/ n; Yphi (* (/ phi 180) pi) ; Pressure angle 8 j% I" ~8 R4 m. Q' m
DO (* D (+ (/ 2.0 N) 1.0)); Outside diameter . e/ a! l2 D5 n: ~, B# O4 \
RO (/ DO 2.0) ; Outside radius , @8 J. ?& G) U/ c
A (/ D N) ; Addendum
0 J$ n4 E+ F# N8 h) I2 O8 ]' d" FB (* 1.25 A) ; Dedendum U9 Q/ x7 r! X6 K: }' e6 R# D
DR (- D (* B 2.0)) ; Root diameter : N: R" Z0 W# v. p' ]
DB (* D (cos phi)) ; Base circle dia.
8 g' p+ C: F# I) `inv-plst (involute DB N phi);involute points
7 G# v9 [ n4 btrimcode nil
+ H3 ^ P" ^6 b% e L3 q& \9 h" h); setq
6 i, i3 U7 S4 [' u(command "ZOOM" (list 0 (- B))
1 b, ~$ P e' w U8 ^" V. P, b9 K(list RO (/ RO 1.5))
4 k3 A" ~3 ^2 l' [% k4 _); command
3 R) |3 `, }$ H3 C7 a! i+ B1 o% U(setq invent (draw-inv inv-plst)); Draw involute. ; Z) G( m$ `( f0 i* `) b% m
(setq p0 (car inv-plst)
' d p" t) N7 s% ]+ d( Qtrimcode (ext-trim p0 DR D);trim or extend 8 Q& x: u7 J% \5 w1 f3 @. D( u
); setq ; the involute. - T$ R! c3 ?3 K7 b3 T# N
(if (and trimcode (= trimcode 0)) ' X9 I+ j0 M& ~7 j# {5 S0 {
(progn ; Joins the involute to the extension. . a; e% g/ L7 ~6 ^" o4 r
(setq p (list (/ DR 2.0) 0))
; J9 s0 y/ K! u/ m i7 Q6 M8 r(command "PEDIT" p "Y" "J" invent "" "X") ) M, t0 Z$ K; M$ [
(setq curvent (entlast))
6 V4 x: o) j" W& c8 ^) r( k); progn
: w5 a: o; M Z(setq curvent (entlast)) 0 l; x' N, ]' G* m
); if
8 L r4 f3 j4 C) P. Q9 k r(if (null trimcode) (setq curvent invent))
% H/ H& t! N7 |$ k(setq linent (draw-top-line D DB N RO)); top line. / y7 l5 H1 E0 V; p% W2 v
(command "COPY" linent "" "0,0" "0,0") 5 [7 g; M" W9 F9 J, \
(setq linent2 (entlast))
' G% K0 ?. P3 g, H; b5 S/ c(setq ent2 (mir-it curvent linent)); mirror curve ' h' ~. a1 H9 z
(command "PEDIT" curvent "J" linent ent2 "" "X") 6 t7 H) i- W% E7 o
(segment DR N linent2) ; Finish the job!
; g+ M3 C7 `0 [0 [) O+ g(setq p1 (list (- RO) (- RO)))
# H) k+ I5 R) S0 B3 ~(setq p2 (list RO RO)) 5 r# t7 Y1 c4 H, ]. F8 }
(command "ZOOM" p1 p2)
0 G1 O0 O, f+ _( V8 q$ C9 V3 k(prompt "\nConverting to POLYLINE, please wait...") * C! S# ] ?+ n
(command "PEDIT" (entlast) "J" "C" p1 p2 "" "X") ( c. Y# i& M. n
(prompt "\nAll done!") ]+ h; _' X( T' X% ?" Q1 `
); spurgear , i1 E" ^2 r( s5 q. \3 P+ V
2 B" d' e# f0 S(defun involute (DB N phi / numer denom frac theta2max
3 Q+ c. N: d0 m* m ^3 k) i3 Q: q; Rthetamax theta-inc theta plist RB xval yval p) I9 b6 I2 M% @2 d
(setq invfact 3)
9 W& A, _9 z7 V c6 ]- b* C(setq numer (+ N 2.0) 6 N0 h2 n5 }$ M; c0 \3 R Q) q! }
denom (* N (cos phi))
5 c7 m9 c, I0 K L% E; hfrac (/ numer denom)
& \, _( Z1 E$ ~& ptheta2max (- (* frac frac) 1)
3 c- x& y: n* w( n o/ D: lthetamax (sqrt theta2max) 4 Y0 l2 X5 d. A, t
theta-inc (/ thetamax (float invfact)) & ]/ `1 ~- |! }! s
theta 0
* Z! T. J. \% K6 }( }- Gplist nil / Y/ u0 v& D( Z3 |& Z
RB (/ DB 2.0) [; ]* W6 M$ F0 c: W% I& f1 c" t5 G8 K/ q
); setq
7 Z7 ?, r5 |) |(repeat (1+ invfact) ) {* q$ K6 g) F& I
(setq xval (do-x RB theta)
7 y% i' w! a6 n3 K7 Nyval (do-y RB theta)
1 V" P* W! \: y2 T5 `p (list xval yval) 0 O0 X7 e* ~" y: l# s4 X
plist (append plist (list p)) $ C( j; k8 R1 s$ Z2 t+ s2 o
); setq ' B Q1 A, o: _+ O5 ^( t
(setq theta (+ theta theta-inc)) M( {( h! _8 h4 n
); repeat 1 U3 G! t: S# b+ s- ^
plist 5 h# D+ k h9 B# Y; i' V
); involute
8 H8 S0 t4 ^6 V6 G. w7 c# V7 e0 K, P( ?/ I D6 o3 f; @
(defun do-x (RB theta) , z( x( _) g* u- C! Z& O7 q5 V
(* RB (+ (cos theta) (* theta (sin theta))))
5 M, `6 f# @& c); do-x
/ c' z8 n$ M \5 O' S) d; q4 f% J5 z6 u" j0 W/ Q9 q+ f
(defun do-y (RB theta)
( q1 D: y. F/ o7 |( ~+ q+ r3 V(* RB (- (sin theta) (* theta (cos theta))))
) Y T5 k; w& {9 e); do-y
h" { p/ Y* I. ?( @- s0 F( i
(defun draw-inv (inv-plst / dirpt plist p) & s$ }6 X% w1 G1 v/ \
(command "PLINE" (nth 0 inv-plst)) % Y. [. H4 E) r( v r0 @) Z5 l
(setq dirpt (polar (nth 0 inv-plst) 0 1)) ' m/ ^+ ?6 I) Q }( d; F
(command "A" "D" dirpt) $ t" F8 Y# r( r3 D/ \4 K) L
(setq plist (cdr inv-plst)) + Q( g, O9 v7 q/ H" z: t
(foreach p plist (command p))
0 t4 z+ h8 _4 c5 [) d- q(command "")
6 `1 i. e+ w2 o- r2 c) C(entlast) 7 {2 \) d$ V" }; B( C8 ~* C" E
); draw-inv
5 Z! _% {. s5 L! g% H0 b+ d( `2 G. i9 N0 p
(defun ext-trim (p0 DR D / trimcode dist endr) + `2 V) D+ I( b
(if (> (car p0) (/ DR 2.0)) ; Extends the involute 6 Q' z& T7 N; G' N: i
(progn
" |8 a% C" m- W& j4 I" d(command "LINE" (list (/ DR 2.0) 0) p0 "")
0 D2 X- e/ H% r4 ]% ?) P(setq trimcode 0)
' |2 U, o8 p J3 @, k! A. `# T); progn 3 k! c1 ^2 q/ m" ?" q. D- ~
); if
7 V! m% c. S+ x5 k( p7 W(if (< (car p0) (/ DR 2.0)) ; Trims the involute 3 a- Y; W% T& y, b
(progn
. |9 A$ S3 O, w+ t: K(command "CIRCLE" "0,0" "D" DR); Root circle
9 k: I3 u D! U3 S+ ]0 f(setq dist (- (/ D 2.0) (car p0))) # Z. P9 F1 X+ j8 A
(command "ZOOM" p0
! y! @# G: X$ M5 S$ F) U/ u(polar p0 0.6 dist))
{, c$ a9 ^2 N; `(setq endr (entlast))
6 @' C& U, w9 _& X2 K(command "TRIM" endr "" p0 "")
6 S2 n0 ]# W8 G$ q$ C( X# H. ^7 h" B(command "ZOOM" "P") + N. G" f R7 P! p: t, p' `* S9 z
(entdel endr) ! z, u( _- S- e. A1 B3 S& i7 W
(setq trimcode 1) 9 ~% r" B( A0 w V \ {; U4 K. s, w
); progn
) e7 H4 ~2 U/ _* ]" O- O* ~); if 5 i2 S8 Z( L* f- o' \' F
trimcode
3 U% E7 y5 m) A) B3 o9 Q- v# n: C); ext-trim
' P; v' X# Q0 Q4 w; E) a
/ j5 Y3 y- n5 h9 h. L(defun draw-top-line (D DB N RO / theta-p xp yp alpha 3 t3 ?2 R" r$ ]3 u t5 ?* F
beta tang angend inv-endpt lend) 0 |+ |# A5 k7 P M( c, K
(setq theta-p (sqrt (- (* (/ D DB) (/ D DB)) 1.0)) $ _3 t0 u3 V4 I, x2 m0 W
xp (do-x (/ DB 2.0) theta-p); This section
9 p4 i9 n5 b9 ?; C- S6 Cyp (do-y (/ DB 2.0) theta-p); sets up angles
# b+ p5 x, Z+ F, zalpha (atan yp xp) ; for drawing a # T& a `( R' }* y( H
abeta (angle (list 0 0) (last inv-plst)) , T; J5 ]3 w( z
beta (- abeta alpha) ; line across the % r! x# J7 a; g7 Y% K/ a
tang (/ pi N) ; top of a tooth
( N* j3 ^* n. U y" e: b1 Mangend (- (+ alpha tang) beta)
8 y/ j: l$ f0 minv-endpt (last inv-plst); This also creates
; E" ]3 Q! j0 z. Glend (polar (list 0 0) angend RO); the tooth / w5 ^7 l# l( z
); setq ; thickness.
v$ c8 P( E1 c( \, \(command "LINE" inv-endpt lend ""); Draws the line
2 d. @% A3 P4 K2 y) p. o(redraw) N: }6 U2 E8 ]3 d8 A% u/ f9 @+ d
(entlast) : R5 @" z. \ Y7 ^5 a
); draw-top-line
, c8 _2 N9 ? n+ J/ _! x# E7 z. F# ~& H3 n
(defun mir-it (cvent linent / pt) 9 v; C7 D" n7 H
(setq pt (dxf 11 linent)) 6 _+ n, c1 s F% M& k! Z
(command "MIRROR" cvent "" "MID" pt "0,0" "")
$ d: B/ q1 m( M(entlast)
9 ?5 Y1 e2 A o/ G); mir-it
' |# o w( x" _3 X: T; N
0 ?& a- @- `+ r% K(defun segment (DR N en / p1 p2 ang dist midp p0 pang
: `# o+ k K, k Q5 `& X6 N9 Ppang2 p p3 ent3 entl1 entl2 en1 en2) : a7 _! R0 L7 _2 p; d" I
(setq p1 (dxf 10 en)
8 ^, A) p8 p% Qp2 (dxf 11 en)
4 x9 ?3 p. ]# Aang (angle p1 p2) ' I0 b' j& e" B6 J& I( q
dist (/ (distance p1 p2) 2.0)
$ c0 K4 C. C/ Y* X% r0 wmidp (polar p1 ang dist) 4 |& S" b) w# E$ s) T
p0 (list 0 0) 0 ` e- W9 O9 [/ d1 R1 G1 @
pang (angle p0 midp)
. x7 |% e) q; D+ j" G, ]# \pang2 (/ pi N) ( G3 V, |/ M9 m; ]6 J; X: B8 _$ M
p (polar p0 pang (/ DR 2.0))
+ C6 s/ k. [# w3 rp1 (polar p0 (- pang pang2) (/ DR 2.0)) 1 H8 k# {) f/ J; T8 n* r$ z0 y3 J( a
p2 (polar p0 (+ pang pang2) (/ DR 2.0)) ! i9 J; l+ l* M0 I
p3 (polar p0 (+ pang pang2 pang2) (/ DR 2.0))
; |8 J9 ]/ S8 }ent3 (entlast); This is the tooth p-line m. n/ j9 A/ x8 x$ _# {4 ^
); setq . W6 e$ r ^' J; z: o# K
(command "ZOOM" "W" p3 p1) 7 @1 M0 U' e3 T8 v- Y' C
(command "CIRCLE" "0,0" "D" DR) ;Root circle
# K6 o7 ^: w" v! o D' B# A, r- j(command "TRIM" ent3 "" p ""); Trim the root circle * d7 z9 l0 E8 L& W# I- A( e: a
(command "ZOOM" "P") ( ~, o, T; C- i6 L, S& [: s& L
(command "LINE" p0 p1 "")
; q; h1 D5 n/ N: v% U& `(setq entl1 (entlast))
! W8 V! Z4 F) D& ^' r8 U( ]' F3 T(command "LINE" p0 p2 "") : t, U; ]' P# u% s [; u
(setq entl2 (entlast))
5 W2 V- ]; s$ u4 Q+ _: W: m(command "TRIM" entl1 entl2 "" p3 "")
- l) L8 ^3 o7 [. H* R0 {(entdel entl1)
$ K) k: g/ N6 {0 ]6 Y2 g(entdel entl2) 2 M2 P7 Y0 m4 |" u$ M% G( I
(entdel en)
$ e) J. D* h( C8 w8 `' ]; E(command "ZOOM" "W" p3 p1) 1 }* T' J% }8 @" o+ h
(command "PEDIT" p1 "Y" "X")
: `0 V( g8 }7 Y! d$ J(setq en1 (entlast))
' w; B: o% a/ e3 n9 |) x' f(command "PEDIT" p2 "Y" "X") % k" {$ w: j% t5 Y, s! H1 @
(setq en2 (entlast))
W) P# g9 g' H' L# H! Q(command "PEDIT" en1 "J" midp en2 "" "X") + ^. h g% X5 Q
(command "ZOOM" "P") ; H! a( X- a! M% l% c7 V; D3 {1 q
(command "ARRAY" p1 "" "P" "0,0" N "360" "Y") ! v. O- X6 r9 ~! o4 [
); segment 0 _* j/ ^& F% Z* W
8 i( L2 Y/ f* |/ m8 N1 g(defun c:sg ()
& M2 Q* u5 n N! L: V7 S m8 W(setting)
" y) S2 V: c* Z5 |(spurgear)
' o- {* W) {: l9 ?- l t3 O2 X(resetting)
$ `) s8 C4 [4 F5 ~" i1 y" O8 ?(princ)
' M4 b9 Q" K, K; V; H- [); c:sg . T3 r( t) ^0 x# V5 [" h8 y
% S% E+ G* a* t. Q; I7 J! O0 d
(prompt "\n**SPURGEAR.LSP Loaded!") ' c8 Z3 j! e, |9 T7 z1 K( p
(prompt "\n Enter 'SG' to start") + W) @, A5 B; P7 f) E! r
;;;end suprgear.lsp3 n% k7 j }0 P B$ ]& ]& `) r
打开CAD图形后点击“工具”菜单→AutoLISP→加载→找到自己所存的
6 @5 v" ^# g4 K' `+ ]( t".LSP"文件位置点“加载”、点“关闭”。在CAD环境下“命令”状态栏里输
+ E f0 e& M+ [5 i# G! m- i, b; n! @入“什么”命令后才能按提示使用? |
发表于 2007-10-20 03:42:53
