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快速繪製3D彈簧, O" @+ Q, p3 Q# |
將下列彈簧的程式(LISP)加載到CAD中就可以使用,很方便的!
1 j7 z% z) a+ E& i5 R: \. a8 h;;;-----------彈簧的程式---------- 8 _9 v5 E0 Y' C' T
(defun c:spring(/)
2 C0 N- a; X4 g0 S3 ?(setq p1(getpoint "請指定螺旋線基點:"))
' }) K0 \5 x+ ~' A- n/ B$ z' b(setq r(getreal "請輸入半徑:")) 6 m5 z7 O7 R/ T& M9 ]. r
(setq d0(getreal "請輸入彈簧絲直徑:"))
1 ^7 V2 V! R! Y/ G6 _) k: x(setq disp(getreal "請輸入節距:")) . O( p% c/ }" @8 q5 ]
(setq n0(getint "請輸入圈數:")) ( H; M; @, m. y* z% R! h+ e$ s; P
(setq n(getint "請輸入每圈細化段數(16/20/24/28/32/36/40/48/52/56/60/100):"))
. A+ Q* ^) b/ H8 s(setq n1(* 1.25 n)) ; 8 Z- E3 v V0 G- o. ?
(setq n1(fix n1)) : W) Q( z; H( M' Y7 u1 l
(setq n2(* n0 n)) ;工作圈細化段數
: I4 [5 p" F, I9 R2 R, d' |2 f(setq delta(/ (* 2.0 pi) n)) ;單位轉角
5 g2 V9 v7 p: @2 v( ~1 o5 @: D5 H(setq j(/ disp n)) ;工作圈軸向位移量
/ {( l t) u2 D, g' `* T; @(setq j0(/ d0 n)) ;支撐圈軸向位移量
6 X; D, [6 s' w! D9 h* S(setq bb(caddr p1))
' [8 Y! s4 [7 K( Z(setq ang 0)
: o- `6 v. \: {0 J& r4 m a8 U(setq jj 0) , P" I/ A1 n2 ^; c) P6 x
(command "ucs" "o" p1) 5 N* n* h$ g& j t" N9 f- s! ?$ A
(setq pt1(list r 0 0)) # Z2 j N' j% o- Y& f* U2 `7 o
(command "3dpoly" pt1) 2 ^: e& M% P2 m1 l: I: A* U
(repeat n1 ;繪製下支撐圈 ! V+ W9 w, s0 E( G% H: H
(setq jj(+ jj 1))
5 G# ` ]7 W, O# J(setq ang(+ delta ang))
" ?1 q+ ^. b x! i(setq pt(list (* r (cos ang)) (* r (sin ang)) (* j0 jj)))
9 X- s; S. ~5 \. ], U' U(command pt) _% L; u1 R* O4 k
) ' e: f B6 a, U$ [
(setq p2(list 0 0 (* j0 jj))) 6 g! {6 H* f; k' p# @; C6 u
(setq g1(* j0 jj)) ;下支撐圈高度
3 a& Q" {# P8 ~9 b+ A' |(setq jj 0)
5 S1 ]1 d7 y g; `(repeat n2 ;繪製工作圈
5 E4 W1 g( F5 i8 _# A v# p! H(setq jj(+ jj 1))
, }" d7 L1 ?& d) X(setq ang(+ delta ang))
7 [0 \. a, E+ @! m; `$ a9 H(setq pt(list (* r (cos ang)) (* r (sin ang)) (+ g1 (* j jj)))) ( [- [4 M+ A" i1 C6 D8 k
(command pt) 9 l9 g) B6 h3 }2 q# r R0 x
)
+ s6 [1 w: N* q* x+ \% q(setq p3(list 0 0 (* j jj)))
2 V, P7 P3 v+ k4 Y5 c5 v. i2 x" l(setq g2(* j jj)) ;
* c, \% u7 H# L6 C8 F$ b( N(setq jj 0) 5 Q& N( @/ |7 [5 r7 c
(repeat n1 ;
0 c z) R# @& u# o(setq jj(+ jj 1))
" U' }( A8 p1 |7 R(setq ang(+ delta ang))
' Z1 u5 P) ~" \(setq pt(list (* r (cos ang)) (* r (sin ang)) (+ g1 g2 (* j0 jj)))) ! p5 y! ?- G% v
(command pt) 9 |# j4 d2 X9 h
) * f5 f. p8 J& f' | w# @1 J( U- A
(setq g3(* j0 jj)) ;; z8 |, X: U$ e+ ~# K! \$ t
(command "")
: \, e) O3 K8 {8 N+ z5 E/ y' C3 d(setq e1(entlast)) 1 u+ g. r& B; ~4 h) G- Q+ p* j
(command "ucs" "x" "") ;
! D1 ~# r. U/ d2 d+ a1 L' q! W(command "circle" pt1 (/ d0 2)) ' O$ E F1 K2 f; M1 J/ k3 k" I2 p
(setq e2(entlast))
6 L4 U2 t6 b: c2 s(command "extrude" e2 "" "p" e1) / {8 C0 l M* d& v- n, t4 O
(setq e3(entlast)) ! Q! [1 \* ` P6 U* S
(setq pt2(list r (/ d0 4) 0)) ; $ p, Z; ]3 e- \: m8 e+ C& ~/ ~
(setq py(+ g1 g2 g3 (- 0 (/ d0 4)))) 1 s! h% U5 p6 i) y
(setq pt3(list (- 0 r) py 0))
3 I8 `3 E: D: Q2 g: x0 X(command "slice" e3 "" "zx" pt2 pt3) & U2 F4 {9 f; [6 w2 X. B( R
(command "slice" e3 "" "zx" pt3 pt2) * K: j2 A @. ?3 i+ t
(command "ucs" "w") 3 y# I- w& K- {0 c$ K4 o! v' D9 p, r
9 c6 n$ ~; i& y: G)
8 a# [- [/ |/ A3 p* R;;;---------end----------彈簧程式結束! |
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