有下面一段渐开线程序：/ m% [2 Z: J0 T5 W c5 @
;;;begain suprgear.lsp
( D' y% h7 p8 l, R+ @ J3 Y;*************************************************
0 A7 u3 `$ l5 @2 f" d. G;SPURGEAR.LSP - a lisp program by Tony Hotchkiss
! Y P' l% L& ]; x. N+ f! V;------------------------------------------------- & Q' ~# e8 [1 k0 K
; This routine draws a spur gear using joined 7 ^( b7 H, J/ J3 P5 F2 C
; polylines. It lets you use any pressure angle
4 P- m- N1 ^; l ?5 O; to design the gear teeth. # T* _% @2 T4 F# d
;*************************************************
( }* O5 [; ~ I1 B# ](defun err (s)
+ i0 ?% _; V. }9 w+ V" ^(if (= s "Function cancelled")
2 S5 s. w3 H7 y0 M4 p: P(princ "\nSPURGEAR - cancelled: ") 0 a6 V1 z+ E* W i, w8 K9 S# ]
(progn (princ "\nSPURGEAR - Error: ") (princ s)
1 _) p- g9 u" g, c) Q/ z(terpri)) ! \- X) y; S# G0 w* z* y2 ]7 S
); if 1 j6 k2 C: y5 ~7 d+ s1 i8 U
(resetting) - K3 A8 P& B# ?
(princ "SYSTEM VARIABLES have been reset\n") ( L2 B7 B: K" U g, \) w5 v
(princ) , e: R2 L' D) x7 P. @8 v
); err
2 X0 t- l% e U0 ^0 a; y" }5 b: v7 Y5 O+ j0 T
(defun setv (systvar newval)
0 V8 f! y# |- X! H(setq x (read (strcat systvar "1"))) " J, H2 w2 n5 Q K8 a# U1 T
(set x (getvar systvar))
9 D; i' o( E9 k' j( K8 C(setvar systvar newval) ' \5 Q0 G# k( ^' W: j/ a1 T
); setv
1 O3 P. ^. P2 D7 _
3 M( d& S& }: u) ]* H(defun setting () / V* x- u w0 B) F, t- s5 ?. D
(setq oerr *error*)
6 `: Q0 H. o3 V( `(setq *error* err) 4 ^, k! Q9 g) `- l8 g
(setv "CMDECHO" 0)
, L4 m7 r. i. f- X l(setv "BLIPMODE" 0) 7 K0 ~0 w7 ^2 _1 D9 o
); end of setting
0 s- w9 p' P2 z6 k% m7 q3 Q7 M9 r9 k# s(defun rsetv (systvar) " V7 N. ]; h1 C
(setq x (read (strcat systvar "1"))) 4 N4 n( u5 Z ]+ l( J' r
(setvar systvar (eval x))
% A& N' ~$ Z" R. ~& G0 p); restv
" F: x$ k x4 F2 E(defun resetting ()
" o/ ?- D% M1 W C0 ](rsetv "CMDECHO") , D6 F/ x' e+ E* Z$ |) O: K+ D
(rsetv "BLIPMODE") 0 s* l& }/ g! D" s/ Q" \/ O
(setq *error* oerr) # H w9 r: r" \; Z. r( ~7 B
); end of resetting " x/ f, X7 p0 `0 k
8 I7 ]' A9 B) s9 o. W: E2 W& b(defun dxf (code ename)
% X/ Z, @0 O7 O(cdr (assoc code (entget ename))) + Q7 B# |, i: f! h. L( d
); dxf 2 Q! \, K7 A% }) J, b5 G' i3 @9 T
% {% ?% L; q$ D: Z% h, A; V. T+ e7 Y
(defun spurgear (/ D N phi DO RO A B DR DB inv-plst p1 * d8 N/ {5 N" J. g; Y! t
trimcode invent p0 p curvent linent linent2 ent2 p2)
% u+ r& o# L" [. W3 K4 }; s(setq D (getreal "\nPitch diameter: ")
1 V9 H. l: n+ UN (getint "\nNumber of teeth: ") # R% I7 p" n2 j5 ]+ R0 p7 H' L
phi (getreal "\nPressure angle: ")
3 ^- Q4 V( |1 U* C y' \phi (* (/ phi 180) pi) ; Pressure angle 5 Y# N* I K- d! Q
DO (* D (+ (/ 2.0 N) 1.0)); Outside diameter
8 K0 R/ H0 ^% _1 ~- a9 T4 r+ M7 VRO (/ DO 2.0) ; Outside radius 7 u7 U( Q" k1 w
A (/ D N) ; Addendum ; `9 }1 x0 [7 f h# E
B (* 1.25 A) ; Dedendum # I/ x1 M: i9 a8 ]
DR (- D (* B 2.0)) ; Root diameter
% h/ w4 {9 H7 z8 z, ]2 O P0 c RDB (* D (cos phi)) ; Base circle dia. : C. c4 P4 d* D2 x; s0 z5 f4 e
inv-plst (involute DB N phi);involute points 3 k( p% s* H1 Y/ _
trimcode nil ; h3 v `- J# L/ \" u. u1 d
); setq * @$ {, G3 _$ Q" x& k: Y7 k
(command "ZOOM" (list 0 (- B))
0 w5 E" x1 r1 h- z' }' e, b1 |(list RO (/ RO 1.5))
, e' M: B6 M0 k: J) ~); command 8 ` d% i8 \9 n8 J" d9 _1 b* ~* h" O# F8 k
(setq invent (draw-inv inv-plst)); Draw involute. : p4 \" i. Q# e- _0 {* z' I) t5 m9 d
(setq p0 (car inv-plst) ( `* r* i/ o" X7 N7 A( C
trimcode (ext-trim p0 DR D);trim or extend 1 V4 P3 Z$ {& t; A/ T5 V& l
); setq ; the involute.
9 x' R" Y0 p& E! x+ M. T(if (and trimcode (= trimcode 0)) + C: Q% g* H6 i- v# N: t7 ]2 _: G: y
(progn ; Joins the involute to the extension. , s& ]2 H+ d$ A- \) J4 D
(setq p (list (/ DR 2.0) 0))
# t6 T' W: {4 b; d' e# @(command "PEDIT" p "Y" "J" invent "" "X")
7 M" Z* b! P# x' z0 @) D(setq curvent (entlast))
& Q5 `. s; B- q* s); progn # Y! x) m6 i8 f& r6 h4 w: G
(setq curvent (entlast))
% i5 Q) i: ^2 Y# E- H; z); if `6 u2 u5 I. v
(if (null trimcode) (setq curvent invent))
8 c! s$ o) }! b. `/ ?(setq linent (draw-top-line D DB N RO)); top line.
3 Q* Y" S; b6 v6 w$ U( s) l(command "COPY" linent "" "0,0" "0,0") & `4 J0 L6 _0 |' v) Q; c
(setq linent2 (entlast)) 3 N- L' B6 @% @. r9 h2 `. z+ A
(setq ent2 (mir-it curvent linent)); mirror curve
5 @$ w! v) L. ]8 P* |(command "PEDIT" curvent "J" linent ent2 "" "X") . C$ \/ u1 ^. H$ ]6 I
(segment DR N linent2) ; Finish the job!
5 y7 {9 N3 c8 h. Q1 H, Z/ D(setq p1 (list (- RO) (- RO)))
; O |: m/ G0 z& h(setq p2 (list RO RO))
5 Q) r" C) _: i) `% C! r- n) C(command "ZOOM" p1 p2)
R- Q2 s: Y, y* N6 s: C(prompt "\nConverting to POLYLINE, please wait...") 7 M% _* w4 ~$ p
(command "PEDIT" (entlast) "J" "C" p1 p2 "" "X") 6 P4 U& ^7 z2 p0 s
(prompt "\nAll done!") 5 ? ?* y6 l! Q) l
); spurgear $ p& `7 `) q( _ O
* Y9 q1 D: Z& f b" K2 b Q( {( C' B2 r
(defun involute (DB N phi / numer denom frac theta2max - Z- Z: I! H6 t- u; B8 v$ I
thetamax theta-inc theta plist RB xval yval p) ' i3 O1 K" y$ I5 B, U
(setq invfact 3) 9 ^+ N, x7 j( i" F( z3 E' }0 j
(setq numer (+ N 2.0) . |- w& B6 b' }
denom (* N (cos phi))
\9 A+ j( O4 S. ]8 \frac (/ numer denom)
: p+ Q5 Z8 h+ z3 _theta2max (- (* frac frac) 1) 7 h- }6 u% k) \3 H& l) x: U0 B
thetamax (sqrt theta2max) ; e9 Y# U9 W" A, b
theta-inc (/ thetamax (float invfact))
7 {3 H9 z5 n) W3 A/ X- z4 ctheta 0 ( M( d& P( o/ ]$ I
plist nil
3 a; M+ [" n: `RB (/ DB 2.0)
7 d/ e; w! e. s9 D5 ?); setq
. g; I" y: Y' X, a) L(repeat (1+ invfact) ! ?6 q+ Y3 G8 l
(setq xval (do-x RB theta)
: z6 T2 p1 C% h8 U Vyval (do-y RB theta)
5 @: T6 y" P5 n; C# [- Vp (list xval yval) 6 [& H$ |% W/ Z. w7 v4 h# Q" a
plist (append plist (list p)) $ b9 X; \. a. q8 z
); setq . N3 x4 I9 g7 x- N8 K- a
(setq theta (+ theta theta-inc)) + x: V" T. F. U# j/ X6 N
); repeat
7 N+ {* q* `! l; h. E* Uplist
; c6 e( s7 R: j& ^/ S! [1 l); involute 7 M2 ], e8 y+ J: p
* P" ]) i. w1 d+ m" q/ J1 T
(defun do-x (RB theta)
4 ?8 w. Z1 @. S; `$ X(* RB (+ (cos theta) (* theta (sin theta)))) # y# n9 `- ~) P! f1 w8 s# V, U# m
); do-x % G: x1 t7 V- o4 d. A
# H5 I# r3 L( x1 V* q9 Q1 j: d(defun do-y (RB theta) / y8 l. B+ L {
(* RB (- (sin theta) (* theta (cos theta))))
5 W* x! h4 w' K2 e); do-y
6 ?! w1 d, R [2 Y0 L( P. s# |" _+ N3 L: U) l4 Q
(defun draw-inv (inv-plst / dirpt plist p)
- c% v _$ _4 w4 s* M$ g6 x(command "PLINE" (nth 0 inv-plst)) 2 O5 b1 R$ S/ a
(setq dirpt (polar (nth 0 inv-plst) 0 1))
% J3 O' N( E Y(command "A" "D" dirpt)
* G+ B/ n& Q/ u" k( h(setq plist (cdr inv-plst))
4 q; T, ]$ e0 C+ I0 {3 t$ c(foreach p plist (command p))
0 F+ ^) ?' V1 H3 ^ `(command "")
; f) I! v! d3 l- J' V(entlast) 2 K# q3 I7 Y, C" u! r4 _
); draw-inv ) t7 C# Q+ z1 R5 E: ~: z7 v
, P8 N: O" D# j5 y7 k/ c4 _
(defun ext-trim (p0 DR D / trimcode dist endr)
9 w- G/ v$ s: Z) z1 |(if (> (car p0) (/ DR 2.0)) ; Extends the involute , n A9 H% F' r' y' \( G E
(progn , m+ q- f" e, p: ]8 k' ?8 D9 K4 e
(command "LINE" (list (/ DR 2.0) 0) p0 "")
7 h' B7 l2 B+ k7 Q( m- K- Q(setq trimcode 0)
+ B$ u1 a$ @6 c); progn
* K0 d- E2 Q5 j5 q0 }6 M); if
- c. U b! h: a3 p9 X0 l) a* ](if (< (car p0) (/ DR 2.0)) ; Trims the involute
, O* s' f T- ?5 J2 y(progn
6 v9 n5 @ |6 V4 ](command "CIRCLE" "0,0" "D" DR); Root circle 8 Y" X8 }( w0 A' M* U
(setq dist (- (/ D 2.0) (car p0)))
0 S1 m2 [4 H" @# a" g. x" p(command "ZOOM" p0
9 Y$ e7 [4 y' b1 [5 W5 @(polar p0 0.6 dist)) & i& m( @2 r5 m+ o M2 N3 V
(setq endr (entlast))
: E+ t" k' E- N W" B/ l(command "TRIM" endr "" p0 "")
" Y. g: J. S6 i1 H8 H+ ^+ S! B(command "ZOOM" "P")
. q6 _( W$ U; `. [(entdel endr) 1 ~3 s. E2 L% Z# \9 x/ V0 J
(setq trimcode 1) , z0 `9 I8 c% V* i
); progn
* D- {9 `3 b3 ^7 z$ ~); if ( S3 i0 _: }! E' X1 u
trimcode 7 I: {/ L7 y4 @- ^2 k7 O3 E
); ext-trim + [ M, e5 K0 k2 N( i O5 [# B! H
5 O$ w% Y0 x" J; A3 _(defun draw-top-line (D DB N RO / theta-p xp yp alpha
4 Z: d8 K6 l, ^1 hbeta tang angend inv-endpt lend) & u9 T( k7 t" |1 p
(setq theta-p (sqrt (- (* (/ D DB) (/ D DB)) 1.0))
: _+ i) _2 y$ U8 y$ C+ vxp (do-x (/ DB 2.0) theta-p); This section * v7 L( \ K- E( _
yp (do-y (/ DB 2.0) theta-p); sets up angles % V* K% b# N2 ~7 z
alpha (atan yp xp) ; for drawing a 6 [, ]$ g0 u& A' s8 F7 a
abeta (angle (list 0 0) (last inv-plst)) ' o8 d, r& t# R/ W5 b
beta (- abeta alpha) ; line across the . s6 C a9 k% O" O( E
tang (/ pi N) ; top of a tooth $ X; w; Z/ \7 v# j& T: v0 c7 |
angend (- (+ alpha tang) beta)
7 \6 |: Q4 y, W% vinv-endpt (last inv-plst); This also creates / F" l- F1 [4 n: @
lend (polar (list 0 0) angend RO); the tooth
: C. O4 ~0 I, ?); setq ; thickness. . o; z0 L4 v! h5 N9 I
(command "LINE" inv-endpt lend ""); Draws the line 6 h" W; D/ T5 o, G3 M5 N8 _5 i7 m
(redraw) ! h: C% h8 Q% U8 f4 f. G' c
(entlast) % q( i- Z" O) c1 g; u* {& Y7 ^
); draw-top-line 7 K* H2 Y& c3 e8 _: `5 m
. c+ j, e2 Z4 N }$ }' w( F5 A
(defun mir-it (cvent linent / pt)
( X9 K# ^8 m3 j" O( Q, E(setq pt (dxf 11 linent))
# k5 X1 u$ Y7 Q(command "MIRROR" cvent "" "MID" pt "0,0" "") / s4 `' }1 W9 ^ n
(entlast) 9 Y- O- e( u/ |3 r& y
); mir-it ) P+ z; m: \; k* i, q" E
" V* q3 N& K; f(defun segment (DR N en / p1 p2 ang dist midp p0 pang
+ |2 r3 N& X# V1 S$ J' [pang2 p p3 ent3 entl1 entl2 en1 en2) " Z' x: L ~/ k$ }$ z
(setq p1 (dxf 10 en)
$ g' L- c+ f( T$ C+ r& up2 (dxf 11 en)
% i" L& r T, y& T3 Dang (angle p1 p2)
7 J; q! s# m; T. m/ l% G' `" udist (/ (distance p1 p2) 2.0)
9 I" _3 y5 A f0 t# f }, mmidp (polar p1 ang dist) ( v4 j; E" V- ~% x! n. ]
p0 (list 0 0)
* {0 P& v& Z+ I6 K* r9 dpang (angle p0 midp) 0 i6 Z& r5 k4 Q% @: H
pang2 (/ pi N)
0 W# Z) e6 Q* f; C0 ^' D5 wp (polar p0 pang (/ DR 2.0)) 9 p) j6 Q+ Q3 q3 P- }
p1 (polar p0 (- pang pang2) (/ DR 2.0))
* t! R' F7 Z+ w8 |; Qp2 (polar p0 (+ pang pang2) (/ DR 2.0)) 6 H. m/ r. f! p. m. U* o0 J
p3 (polar p0 (+ pang pang2 pang2) (/ DR 2.0))
7 O" B) i; P* _4 Rent3 (entlast); This is the tooth p-line
& L1 w# I% o9 g) V( F* k9 @/ R3 J: q); setq
2 a) P0 v) ?. u& d(command "ZOOM" "W" p3 p1)
4 Q- p u9 k9 P6 t+ X# y(command "CIRCLE" "0,0" "D" DR) ;Root circle
; ~# }) f! Q% W# n3 s(command "TRIM" ent3 "" p ""); Trim the root circle 6 v: _( N) b- L( C6 E: Z7 J8 q
(command "ZOOM" "P")
: f& [. R' p" L* a3 U) f4 R6 X! d(command "LINE" p0 p1 "") # d7 a' V7 V) ^; L% q
(setq entl1 (entlast))
6 ?7 L* Q+ j3 t0 N(command "LINE" p0 p2 "") ) m3 v2 K# n% O5 G% |2 m; _* U# y
(setq entl2 (entlast)) . z7 p) ]. C8 @
(command "TRIM" entl1 entl2 "" p3 "") 8 R1 }% l3 I/ Z- C& v& Q: F" R
(entdel entl1)
2 O I& Y R* G) i(entdel entl2) ! |& m% u# U- a: T
(entdel en)
6 L u/ h) O, B* `(command "ZOOM" "W" p3 p1) 5 }% C% y! Q* M2 z5 a! J
(command "PEDIT" p1 "Y" "X") 0 u( A, c. d. F" t0 a3 ~
(setq en1 (entlast)) $ @) x5 d a0 s9 Y* {
(command "PEDIT" p2 "Y" "X")
( |6 S8 @0 q- x(setq en2 (entlast)) ! z9 t R1 v9 l1 ?6 u6 o
(command "PEDIT" en1 "J" midp en2 "" "X")
5 w3 Y5 ?% E% T/ a6 k(command "ZOOM" "P") " N( t9 I7 S5 b4 s4 X
(command "ARRAY" p1 "" "P" "0,0" N "360" "Y") + m3 {5 |0 [+ p6 M% }' a
); segment ' ^3 z/ D' s' y. {3 j
$ E2 ]& G( l" R) H* E( s- [(defun c:sg ()
2 X; \; ?/ g; i: [' B# T(setting) 7 g5 E" D5 n# ]8 e
(spurgear) ) X) B" r4 e2 U) O0 F5 B% `7 d
(resetting) # p5 C0 f1 ~; m5 J& X7 K
(princ)
3 g( w4 B$ u* u7 z6 h5 z; u); c:sg ) D# t! }, e; x! ^
( ]3 E- b' Z. q% ^7 G" f0 I. R9 L& K(prompt "\n**SPURGEAR.LSP Loaded!")
5 w# K" W3 Y3 o: u(prompt "\n Enter 'SG' to start")
) ?+ c" {0 K7 x! B- Z; s8 ~! e;;;end suprgear.lsp
( y7 c/ O' h p打开CAD图形后点击“工具”菜单→AutoLISP→加载→找到自己所存的 }( J# A; v- q6 @2 O+ f
".LSP"文件位置点“加载”、点“关闭”。在CAD环境下“命令”状态栏里输# I) `9 {( h" U( `; w
入“什么”命令后才能按提示使用? |
发表于 2007-10-20 03:42:53
