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大家试一试用下面的程序 5 x3 S5 e! O- u; w# M3 Z8 C
把下面这段程序放入autocad2004的安装的目录下面的support目录里面的acad2004doc.lsp文件里面(用记事本打开),以后你在cad里面的command:输入:spring ,就可以绘制弹簧了! + E) y9 n/ \& B! k2 @
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4 v7 X; ]) J: E, `- Y6 ?. Q0 |4 s;;;-----------弹簧的程序----------
; e4 p* v" Y# [' [$ I1 B5 j: m(defun c:spring(/)
7 h; g" B; p7 v$ p- ]; _6 y& L (setq p1(getpoint "请指定螺旋线基点:"))
- h/ y$ J! d6 |8 I* [0 f8 p. L1 \ (setq r(getreal "请输入弹簧平均半径:"))
) x# T2 }2 E6 z \) C# m (setq d0(getreal "请输入弹簧丝直径:"))
; Z1 d, n. E( L (setq disp(getreal "请输入弹簧节距:"))
( v! t! f8 X1 n, H (setq n0(getint "请输入弹簧工作圈数:")) 2 ^; {' F1 w$ ~3 H7 x5 b
(setq n(getint "请输入每圈细化段数(16/20/24/28/32/36/40/48/52/56/60/100):")) & @& ] {, a ~6 |
(setq n1(* 1.25 n)) ;支撑圈细化段数
; @3 Y7 L. v- }) Y (setq n1(fix n1)) 8 b# y: @6 _- S& t( ^+ v' l9 o
(setq n2(* n0 n)) ;工作圈细化段数 5 Q- h: ^* p& n2 b f% a
(setq delta(/ (* 2.0 pi) n)) ;单位转角
7 ^; E$ S$ k" G! q1 ]* E$ H8 A! d (setq j(/ disp n)) ;工作圈轴向位移量
! H2 n v B5 f6 { R: v (setq j0(/ d0 n)) ;支撑圈轴向位移量
1 m( F% @( }' w (setq bb(caddr p1)) 2 Z4 G6 m: m* A1 T0 Z7 f7 @: _
(setq ang 0)
7 D2 A; T5 c9 F( b. X (setq jj 0) % h6 p J- W$ O0 Z( s" I5 \
(command "ucs" "o" p1)
2 U* L( }4 U A: m1 j0 _" K/ p (setq pt1(list r 0 0)) : P7 L8 Y- M0 r" m4 P
(command "3dpoly" pt1)
. T6 t( d- H H" q (repeat n1 ;绘制下支撑圈 3 Z5 a, }, [5 E% ]- y, D) z+ ^
(setq jj(+ jj 1)) - i( V, z$ D% [5 ]0 w1 {$ H% |
(setq ang(+ delta ang)) 9 @" p. z ~! K5 v
(setq pt(list (* r (cos ang)) (* r (sin ang)) (* j0 jj))) % R5 y: ]+ d$ A; A: }3 S
(command pt)
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' e! A# C, Y$ {) g (setq p2(list 0 0 (* j0 jj)))
2 G$ W# q1 D a; q+ L6 l B2 X (setq g1(* j0 jj)) ;下支撑圈高度
6 T" |8 {; |$ ^! _ (setq jj 0)
9 w5 W) F: O" r! h" q: z" R, Y) k (repeat n2 ;绘制工作圈
8 M# |1 R# X. R' n (setq jj(+ jj 1))
4 V3 ~) h1 G; U T% a1 }! V6 [ (setq ang(+ delta ang))
& u% u* M# G, c4 \0 _ (setq pt(list (* r (cos ang)) (* r (sin ang)) (+ g1 (* j jj))))
1 j* c) ~7 `. G" `' O% p (command pt) 5 D* i& ~9 ]9 k4 O
)
. a% M& L" B7 n( j9 \6 } (setq p3(list 0 0 (* j jj)))
. `" e( z: J" ?* i, [) H (setq g2(* j jj)) ;工作圈高度
6 O$ t8 A( n5 m3 o2 x- s$ y (setq jj 0)
2 p' A5 l/ K5 B. L w, R (repeat n1 ;绘制上支撑圈
( c: Y2 ^: Y% i1 g; h5 G0 K (setq jj(+ jj 1))
% Q8 |% {6 l' K. q) e; l (setq ang(+ delta ang)) ) d$ F5 S# v' H$ C1 V3 Q9 [
(setq pt(list (* r (cos ang)) (* r (sin ang)) (+ g1 g2 (* j0 jj))))
2 _$ a; J5 o+ m; E z' O: L q (command pt) 5 r: `$ \4 i- j' L; q& t2 v+ |
)
! N; f5 a0 r" L* v! ]9 Z (setq g3(* j0 jj)) ;上支撑圈高度
6 }# S( p O& ^8 w, F (command "") " n ^: i6 h, H( Q
(setq e1(entlast))
, P2 [3 @2 i& M; R1 ^ (command "ucs" "x" "") ;拉伸弹簧 & k" v( I# n+ \% Z. E8 ]! P/ {
(command "circle" pt1 (/ d0 2)) 1 m" B3 ]+ P4 E; z. C
(setq e2(entlast)) 1 i; M- s7 F5 d" f* C
(command "extrude" e2 "" "p" e1)
" j" _& f* b. t; ?" d- m (setq e3(entlast)) ( u# f, ~2 K" d' @; b) F8 a
(setq pt2(list r (/ d0 4) 0)) ;磨平
: D/ G* O0 e8 U (setq py(+ g1 g2 g3 (- 0 (/ d0 4))))
% l) {9 {& y0 c! ?, F# A) i (setq pt3(list (- 0 r) py 0))
q5 a! N, Z" R- i) ~8 a (command "slice" e3 "" "zx" pt2 pt3) 7 i5 h: S! B' X9 l4 x5 t5 l Q' N [4 r
(command "slice" e3 "" "zx" pt3 pt2) ' x! @- n2 d; a, M0 _
(command "ucs" "w") . u2 e) Z2 B8 D
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;;;---------end----------弹簧程序结束! |
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