有下面一段渐开线程序：7 A7 {" I; _2 `1 x. C3 `; m5 v
;;;begain suprgear.lsp
5 q; j( t9 S% g- J4 h4 n s( ?. t;*************************************************
$ b1 g0 j! j9 w+ [2 s2 ^;SPURGEAR.LSP - a lisp program by Tony Hotchkiss
/ }; f/ i8 B: h' b+ W, M;-------------------------------------------------
; K6 v3 O2 u% k5 R6 {3 Y! `" r' k; This routine draws a spur gear using joined ! Q: E- N; V0 L0 y2 `
; polylines. It lets you use any pressure angle 8 j. P0 B/ j1 D1 h+ y- X* c( w
; to design the gear teeth. 2 g P$ `, J% g. u# ^% O2 t; \
;************************************************* - C! O! I0 w: u; x4 U4 ?. m
(defun err (s) 9 H+ g7 h3 }+ \4 d# }
(if (= s "Function cancelled") - Q, c' |8 m5 W6 Y" y2 H
(princ "\nSPURGEAR - cancelled: ") 7 E! p2 ?+ ]- X4 e
(progn (princ "\nSPURGEAR - Error: ") (princ s)
8 T/ w, B* ?3 x+ v: v0 K(terpri)) 6 V9 {. u: j7 F
); if 5 X9 u! j, K; j! r7 t U& m
(resetting) , N. ^2 M c/ T4 B0 W: W4 i9 F
(princ "SYSTEM VARIABLES have been reset\n")
7 |# b. |* w J(princ) ) g; k% {* J3 ]" W( {8 j. H
); err & ~6 |/ ^; M$ s# l& O
8 b' |2 G$ h; r8 R(defun setv (systvar newval) 9 z, I$ V o3 X
(setq x (read (strcat systvar "1")))
# h3 G O1 y! g& n(set x (getvar systvar))
$ S; ~ L ^+ U) G: D(setvar systvar newval) 0 c* S( Y" P# k. N* S( O8 g
); setv 2 A% x8 C. Z! l
6 H, j- T; \- u+ d
(defun setting () $ w' `) { D( N3 `* h- f+ C2 o
(setq oerr *error*)
- W8 Q8 }9 S! B- X/ \ [, Y0 j(setq *error* err) + m6 v1 r- S x" S
(setv "CMDECHO" 0) , f/ r- j- b+ Y' w/ q+ v- z
(setv "BLIPMODE" 0)
$ [ Z- O, q9 n6 }); end of setting 0 r8 f4 E% c! R6 S% D: F8 G
(defun rsetv (systvar)
6 y; C; D8 U4 V! B(setq x (read (strcat systvar "1"))) 7 U& U7 d1 p$ O# p, f1 F8 _; ]/ e
(setvar systvar (eval x)) 8 H# }. B% |$ |& T9 n
); restv
7 G: n, j: D" q( m# |(defun resetting ()
: z3 x3 @& g5 ^$ B; {% n9 T( [$ }3 y(rsetv "CMDECHO") & x% x4 {, c" P+ o% j. @
(rsetv "BLIPMODE")
& v' w- ^+ B' A! f% K(setq *error* oerr) 4 L0 |; I6 c9 `$ `
); end of resetting
- F5 A9 k: @- e& S L B* D) x4 l! @0 Z; q; F" p, Y, r$ h
(defun dxf (code ename) 1 |7 I! Y, d8 S! a
(cdr (assoc code (entget ename)))
$ |, a% u B9 S% U. V); dxf
. q5 C+ a( u- u0 P+ ^' [4 K) z/ G' n- Z# K! e
(defun spurgear (/ D N phi DO RO A B DR DB inv-plst p1
2 a5 E9 W" @; f2 d3 z* _1 otrimcode invent p0 p curvent linent linent2 ent2 p2)
z5 D t- U$ r/ H( p4 C(setq D (getreal "\nPitch diameter: ")
9 e$ b& j1 G7 r4 j; |/ ]- o# f% bN (getint "\nNumber of teeth: ")
5 {# f) F7 E; x1 ]/ cphi (getreal "\nPressure angle: ") , }2 b& Z) s+ P3 d7 _+ c5 a/ h$ W" z- h
phi (* (/ phi 180) pi) ; Pressure angle ; R' @6 P0 W# l6 ]1 K0 \
DO (* D (+ (/ 2.0 N) 1.0)); Outside diameter 1 H2 h2 }9 w( z
RO (/ DO 2.0) ; Outside radius 6 a0 N2 l1 X, D5 C! q
A (/ D N) ; Addendum |. Z. d) o4 S* |
B (* 1.25 A) ; Dedendum 7 I# ?" C1 q) |& E7 ^; `
DR (- D (* B 2.0)) ; Root diameter
% w) K, u6 Q( U! wDB (* D (cos phi)) ; Base circle dia.
7 S9 t6 F! g" O- M) ~inv-plst (involute DB N phi);involute points ) Q4 x! [7 g& A0 C1 z* @' C- e
trimcode nil + p- s# ?# K/ L. |2 l
); setq 6 A6 |- D' ]( _4 S: m- `: ^1 U; m
(command "ZOOM" (list 0 (- B)) 8 b/ W) Q. ] `
(list RO (/ RO 1.5))
( T* _: y' D: ~# `4 u% R* {9 |); command
! D. d) T- }' r! d* U+ ]) g(setq invent (draw-inv inv-plst)); Draw involute.
+ G/ f/ H \8 e0 p& D% q4 d5 [% K( y(setq p0 (car inv-plst) / @% `! b7 ]4 u9 P N1 ~1 O" s! z/ K
trimcode (ext-trim p0 DR D);trim or extend 2 Q `( F4 `( J
); setq ; the involute.
4 i. v& [4 _- V; w8 F9 ]% x& u. v(if (and trimcode (= trimcode 0))
0 M7 e( a' Y/ n% d+ q* O(progn ; Joins the involute to the extension.
: ^ T* h4 K3 o# e& p(setq p (list (/ DR 2.0) 0))
( W" g! P5 z* c(command "PEDIT" p "Y" "J" invent "" "X")
; S" N0 m0 G3 R5 i2 ~! u: U/ X(setq curvent (entlast)) ) p! Q% L6 E: H% g
); progn , |4 A8 q, y. u4 H
(setq curvent (entlast)) 1 Q/ t- J# Y# a* U9 W
); if
; v5 \1 d; `' O" ^(if (null trimcode) (setq curvent invent)) # t2 ]; p' T9 T7 J V8 o
(setq linent (draw-top-line D DB N RO)); top line. ! N% y+ v8 M0 R2 S% U8 k. f% m h
(command "COPY" linent "" "0,0" "0,0") 9 Q; ?2 m3 t3 Z( B$ J5 Q
(setq linent2 (entlast)) & q B) @) F! `& G7 L3 [* K
(setq ent2 (mir-it curvent linent)); mirror curve
( p5 {: _+ S3 \0 ~5 O, ~; x(command "PEDIT" curvent "J" linent ent2 "" "X") 4 K" c5 k" a6 Q
(segment DR N linent2) ; Finish the job! 7 h4 V) x) T% R
(setq p1 (list (- RO) (- RO))) % D& f- h7 p0 t3 m3 m6 p2 ]
(setq p2 (list RO RO))
! ?# g% n3 M* _(command "ZOOM" p1 p2)
, R8 P8 ?% V' k4 q" m(prompt "\nConverting to POLYLINE, please wait...") * X S" G+ J, g- j
(command "PEDIT" (entlast) "J" "C" p1 p2 "" "X")
5 q, @) N1 a7 R6 x' Y/ a(prompt "\nAll done!")
: z0 p" L% M1 Y) ^); spurgear
! H4 b+ O2 L, U) |! t: ^1 [+ W6 j" }7 Z" j0 z7 _' c
(defun involute (DB N phi / numer denom frac theta2max p3 p8 U# D# N$ d6 R$ f4 V" S9 w
thetamax theta-inc theta plist RB xval yval p) - E( ^3 H. B" Z/ }
(setq invfact 3)
$ G$ }/ C# y5 z9 V4 X(setq numer (+ N 2.0)
: g1 c3 ]- D8 N+ v3 r! g1 xdenom (* N (cos phi))
' z+ Q8 g+ x, W& Z6 gfrac (/ numer denom)
( k% ~& O% \( g# p0 Z5 S! Vtheta2max (- (* frac frac) 1) 9 P/ h( L- @" z3 o% Q" I9 S. h
thetamax (sqrt theta2max)
6 n* q' W: u* n$ U* o1 a4 }+ e1 Vtheta-inc (/ thetamax (float invfact))
9 [5 i" p. N5 y' {5 utheta 0
# u h# J( n' ~% \% ^plist nil
, F2 W+ x, B& |* o g* G8 F5 SRB (/ DB 2.0)
1 q# Z- ? H- V1 x$ A/ ~# X); setq ; z2 I9 P' E/ {; ^; @
(repeat (1+ invfact)
5 [/ g n; F% E- s(setq xval (do-x RB theta) 0 @, i' @* F/ L+ E: ^- @
yval (do-y RB theta)
+ e7 \' X; Q" p l* @% N! x) x, cp (list xval yval) $ J; ^0 f% x" I1 N
plist (append plist (list p))
6 |4 [, p+ L5 x v- y); setq
, V, ?: {; K0 q9 U% |" x, ^(setq theta (+ theta theta-inc)) ( \; x$ i O- U Z7 T
); repeat
7 h' `% J( T5 `8 dplist
# X3 I# o/ E9 c9 ~8 O; ]); involute
2 T. o- A% h. P2 Y! y2 g1 J" d8 k' X/ f. e
(defun do-x (RB theta)
3 G5 Q4 D5 `* U(* RB (+ (cos theta) (* theta (sin theta)))) . Y* ^6 L4 Y8 m1 L: k: N
); do-x
m, s3 C r+ l8 ^' _& M1 f. j( i* L% x' P+ x- o+ m
(defun do-y (RB theta)
i# Z O& Z9 e: P8 _7 }8 G+ L(* RB (- (sin theta) (* theta (cos theta))))
$ v& t: B9 i! O); do-y % q7 \1 ?: i( s: F. X: p, P
( ]- V4 R1 M: A1 M) n
(defun draw-inv (inv-plst / dirpt plist p) $ v3 V5 ~0 U1 @; D# D& [& D
(command "PLINE" (nth 0 inv-plst)) 6 Z* @. m" |6 f& |7 J4 i
(setq dirpt (polar (nth 0 inv-plst) 0 1))
& Z) c) u8 P A R" G# G, U(command "A" "D" dirpt)
: ~7 d6 Q1 J# C(setq plist (cdr inv-plst))
7 J* O U& N& ^5 G3 ^(foreach p plist (command p)) 0 T. H( U/ L8 I
(command "") * r! G) _. j0 h; I5 u
(entlast) " ]2 {- o9 [+ d9 S* g
); draw-inv 2 T/ N- V' `+ ]9 O' }1 {
/ j7 z' v; g$ I! R(defun ext-trim (p0 DR D / trimcode dist endr) # @% y9 M: H$ C" W0 W5 m- c3 x
(if (> (car p0) (/ DR 2.0)) ; Extends the involute % M7 y% P: w1 ^+ Q
(progn , B! f: }8 g6 ~7 F0 g& y: P1 H6 e' f
(command "LINE" (list (/ DR 2.0) 0) p0 "") 6 m4 |' v$ A0 e! J+ s6 o4 U7 N5 ]
(setq trimcode 0)
# a$ x: `7 }0 D; N( m$ V6 H0 o& @); progn
2 u% ?$ v* O6 U& K, L# ^); if 0 R& A* P3 H% W7 W4 u T
(if (< (car p0) (/ DR 2.0)) ; Trims the involute 5 _# U( Y( S" q3 v* n5 {+ j
(progn
6 [* l k2 O( A(command "CIRCLE" "0,0" "D" DR); Root circle
" g" P# q! v) V R0 u(setq dist (- (/ D 2.0) (car p0))) ' r+ g) [7 m8 G9 a; E
(command "ZOOM" p0
/ W2 _/ y+ c1 n' V(polar p0 0.6 dist))
( w1 }* I R" q' c! [0 |(setq endr (entlast))
! E3 O. S% l; z8 g: b- j# ?, l(command "TRIM" endr "" p0 "")
$ P8 C, ?0 }) w) O' ?(command "ZOOM" "P")
+ G; R. [# _4 P, w; D* E2 k. Y3 z(entdel endr)
4 ]- U4 ^3 G" F; j& Q7 A% m W& h0 ^0 r(setq trimcode 1) 7 \. l( g4 ^( m
); progn
1 O1 x c5 j) p, _9 k4 z7 c); if
& M- d0 h: o" m6 m% u( f, Etrimcode , F. U2 i: e1 \# Y
); ext-trim
3 X. A( M/ Z/ E6 n5 ?- c8 c" T, Z8 G1 I/ Q& W
(defun draw-top-line (D DB N RO / theta-p xp yp alpha a7 g% ~2 R- Q4 z- ~8 B6 U
beta tang angend inv-endpt lend) ' u( f# |% t0 U
(setq theta-p (sqrt (- (* (/ D DB) (/ D DB)) 1.0))
" y: N2 s% u: h2 Exp (do-x (/ DB 2.0) theta-p); This section 5 ^$ C7 A7 A2 C* a9 S6 x$ d
yp (do-y (/ DB 2.0) theta-p); sets up angles 1 A, B, o" k5 a- a% c
alpha (atan yp xp) ; for drawing a ! e- e2 y9 Y4 i: k! a( q) Z+ I
abeta (angle (list 0 0) (last inv-plst)) 8 u+ h9 z! W6 c- p6 u0 q
beta (- abeta alpha) ; line across the
. w3 O. j9 x7 {; K( Stang (/ pi N) ; top of a tooth " h# B1 j: c. l. ^
angend (- (+ alpha tang) beta)
, p3 ^4 [0 P1 ~inv-endpt (last inv-plst); This also creates
! U+ i! P$ s1 e" _) vlend (polar (list 0 0) angend RO); the tooth - Z1 ^3 U2 y( f6 d+ z0 X/ | O
); setq ; thickness. " F+ @# R" N' p: x/ K4 ~
(command "LINE" inv-endpt lend ""); Draws the line
1 K* s3 P; K) l6 j6 E; G(redraw)
- F1 G- [' h2 a' e(entlast) 5 p7 [: Q2 I: Z. g+ U
); draw-top-line
) q3 c0 ]+ B5 M! B k
6 G Y6 L1 ^& t" ^" ?# B(defun mir-it (cvent linent / pt)
& B7 H2 ^ p: o3 s2 X9 {: i(setq pt (dxf 11 linent)) . r- N. J/ e1 e/ m! q. V
(command "MIRROR" cvent "" "MID" pt "0,0" "") . A: X7 d. X9 W- B. t
(entlast)
+ m! e" n9 f$ |$ ?8 Y o); mir-it
- ?$ R) _$ S; P5 e% Y Q$ J# H. X4 g9 P+ D1 a% i @7 X
(defun segment (DR N en / p1 p2 ang dist midp p0 pang : s0 @8 [ G* }
pang2 p p3 ent3 entl1 entl2 en1 en2) 5 L" P: ~, r' U, n( L
(setq p1 (dxf 10 en)
9 b* g+ A0 Z/ L: b8 ]5 l- U6 E) cp2 (dxf 11 en) ( ?. P' Q5 m d& r
ang (angle p1 p2)
3 r. {6 n5 K; |4 ~dist (/ (distance p1 p2) 2.0) 8 n4 }/ f9 U |7 E( i
midp (polar p1 ang dist)
! ~( J ~% ?' N, k: ]3 _ O x( rp0 (list 0 0) F4 J9 L+ l# W3 {- Q
pang (angle p0 midp) + h$ b: S# f" B0 H
pang2 (/ pi N) 8 b0 a, e* \' _/ ]# e+ G
p (polar p0 pang (/ DR 2.0))
5 s' H( S) J n2 p, F2 J' Np1 (polar p0 (- pang pang2) (/ DR 2.0)) ' S; z6 e" \$ P5 e" I/ Q
p2 (polar p0 (+ pang pang2) (/ DR 2.0))
9 L& j7 F' @& N( V* {) xp3 (polar p0 (+ pang pang2 pang2) (/ DR 2.0))
% S+ l2 u! k' ~# e: sent3 (entlast); This is the tooth p-line
; Z1 t; P0 }* ?3 g9 {" l); setq
! v2 ]) V2 t% q" m0 D; S(command "ZOOM" "W" p3 p1) $ t- y! {& ?/ V3 \& h u: C
(command "CIRCLE" "0,0" "D" DR) ;Root circle ; w) B( |% d1 V! X/ F+ d
(command "TRIM" ent3 "" p ""); Trim the root circle
8 o' |7 {/ W0 L2 \(command "ZOOM" "P") 7 N' Y. Q) w6 _
(command "LINE" p0 p1 "")
2 F) q8 `& ]! [7 v- i7 q(setq entl1 (entlast)) + I5 X. E8 |& l2 r
(command "LINE" p0 p2 "")
7 j, T8 {& B) A8 N! H" ]6 M1 {7 V(setq entl2 (entlast)) 2 f6 P* u3 p% V3 o$ i6 G6 ^
(command "TRIM" entl1 entl2 "" p3 "")
" M' q8 q. ?" {8 ^ ?(entdel entl1) 9 Q( |& b% @! g- ~) z
(entdel entl2)
2 N( ?) O1 @, M' y) B' x(entdel en) & e& L5 R3 S% s
(command "ZOOM" "W" p3 p1) - C ?" a4 b+ y4 X' z; M
(command "PEDIT" p1 "Y" "X")
6 ]6 k" m" i3 E& b# K) j(setq en1 (entlast)) ' E: e5 z7 R8 V6 `$ @* n; Y: \
(command "PEDIT" p2 "Y" "X") 4 D$ g$ }1 ` g: X
(setq en2 (entlast)) 0 N- P/ _* D" H$ R
(command "PEDIT" en1 "J" midp en2 "" "X")
: Y4 |; M- z8 u, Z(command "ZOOM" "P")
( o/ \( s$ d8 m2 ]% t9 W+ J: U(command "ARRAY" p1 "" "P" "0,0" N "360" "Y")
# y0 k# m, h6 ]# B. { V8 M); segment
+ p7 [) K5 h: _: j2 k' m$ _7 N, K! I! m$ t
(defun c:sg () / n! j7 A- L+ [6 U0 R. j
(setting)
0 y9 Q) e- q) }( B4 n) B" U% s3 j(spurgear)
! g% P+ \0 }" G(resetting) p4 _! b/ D1 ^4 s* ^- R
(princ) $ Y! k9 ^+ z: X! ?0 L$ `, \
); c:sg 0 K3 `) w; J) w, C
- k& e7 P1 v2 Q: _
(prompt "\n**SPURGEAR.LSP Loaded!")
4 T+ Q! p2 I, m( T* K(prompt "\n Enter 'SG' to start") " Y5 Q. N; |5 A% D1 a, e- r* c7 A
;;;end suprgear.lsp: W' }! t1 Q8 w4 C9 g( h7 m
打开CAD图形后点击“工具”菜单→AutoLISP→加载→找到自己所存的# H8 N" |: M; d9 A/ A% X8 H2 ] g G
".LSP"文件位置点“加载”、点“关闭”。在CAD环境下“命令”状态栏里输
7 S7 S. v; x( T5 P入“什么”命令后才能按提示使用? |
发表于 2007-10-20 03:42:53
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