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(defun errMsg (s)& x* f; {- J3 q4 R
(if (/= s "function cancelled") (princ (strcat "\nError: " s)))
6 U- q9 ?- o/ n/ ^" G7 B, ^ ; 当命令执行时出现错误
. }/ }' @# X9 T0 [ (setvar "cmdecho" ocmdold) ; 例如用户按下了CTRL + C! r% q- T9 n2 U
(setvar "osmode" osmold)+ j Y# U# C; U; U( o3 V' s$ h
(setq *error* olderr) ; 恢复旧的错误处理
+ s/ E# I2 Q8 g9 B2 w7 h4 a (princ)
/ c3 d" j0 g+ @+ g: l$ z$ ^): E) A+ d, L2 R/ O$ X
(defun c:3Dthread (/ radouter threadpitch threadlength threadangle , x: z& W) O$ J8 a9 y) y9 v, U
ptStart innerdiafactor radmid radinner ocmdold osmold 4H 5H 6H h6 g6), i s. r+ _7 p: Z" K, h5 A* k
;-------------------------------------------------------------------
6 {: s& }: H0 v* `" Z S" ` ; 获取公制外径大小、螺距总长; @( z4 z6 l( t1 D$ }+ k
; 然后计算一系列几何点5 q8 S( q% r; q9 T
; 并且关闭对象捕捉、命令回显/ |* U% X% \- {4 a' L$ ?
;-------------------------------------------------------------------4 r. o; w M% y3 `2 w
(setq 4H (list 0.0015 0.002 0.002 0.0025 0.003 0.0035 0.004 0.005 0.006 0.007 0.008 0.009 0.010))
1 x) p, @! s, w# O& f( D$ { (setq 5H (list 0.002 0.0025 0.003 0.004 0.0045 0.0055 0.0065 0.0075 0.009 0.010 0.0115 0.0125 0.0135)) 4 W& R5 a2 p% d$ f% T
(setq 6H (list 0.003 0.004 0.0045 0.0055 0.0065 0.008 0.0095 0.011 0.0125 0.0145 0.016 0.018 0.020))
+ V7 `# n! ]7 Z (setq h6 (list -0.003 -0.004 -0.0045 -0.0055 -0.0065 -0.008 -0.0095 -0.011 -0.0125 -0.0145 -0.016 -0.018 -0.020)) 8 { x6 ~: x2 B7 Z. }- r
(setq g6 (list -0.005 -0.008 -0.0095 -0.0115 -0.0135 -0.017 -0.0195 -0.023 -0.0265 -0.0295 -0.033 -0.036 -0.0515)) & [: R `; A! \2 o) c
(setq osmold (getvar "osmode")) ; 保存调用前的osmode系统变量值4 ]4 D+ ~9 w, T7 Z: r% B
(setq ocmdold (getvar "cmdecho")) ; 保存调用前的cmdecho系统变量值
$ F- j. m9 q7 t3 Z6 D (setvar "osmode" 0) ; 关闭对象捕捉 6 R' h/ s! n/ T* c( O% J6 p* O$ \3 _
(setvar "cmdecho" 0) ; 关闭命令的回显
0 ?! H& U* p/ c+ u$ Z: |; V9 h; _
$ F8 W+ A3 w" e8 C (setq innerdiafactor 1.5) ; 设置内径系数# S9 G/ U, u% j1 C' A/ x
(initget 7) ; radmid 必须非零、非空、非负$ M2 a3 S6 q- j1 k, L3 [
(setq radmid (getdist "\n公制外径: "))0 V3 K% A9 G) D- Q% T* E$ L. I# R: m
(initget 7) ; threadpitch 必须非零、非空、非负7 z0 A0 K7 q- K) G
(setq threadpitch (getreal "\n螺距: ")), l b9 \ x1 O+ _! x
(initget 1) ; ptStart 必须非空
2 l& G! N2 x1 @4 ]! M9 q5 e2 b1 P (setq ptStart (getpoint "\n起始点: "))
; P3 q0 H; P+ e. E) e& o. k2 J" R (initget 3) ; threadlength 必须非零、非空、非负
! |$ }, m/ ~9 J5 C. K2 P D9 Y& O (setq threadlength (getdist "\n螺纹总长(Y方向): "))2 c' ?8 D% t7 _; D; }$ o9 a
; 对公制外径添加公差2 D$ R! d0 Q7 e9 y
(if (<= radmid 3) (setq order 0) ; 根据公制外径确定公差带中位置1 r& z* y6 B9 L/ ~; e
(if (<= radmid 6) (setq order 1)) O9 c! D% a# ]3 `4 H& z
(if (<= radmid 10) (setq order 2)
" ]3 M9 w1 {# M (if (<= radmid 18) (setq order 3)
& G" ^+ T. K- U- Q$ v: Z$ e5 b (if (<= radmid 30) (setq order 4)
% w% l9 F" G- H' M% k' A9 O$ l (if (<= radmid 50) (setq order 5)
& v. ?9 R% s( u$ R (if (<= radmid 80) (setq order 6)' T9 B. g+ c1 l7 O) e% j
(if (<= radmid 120) (setq order 7)
_# W$ J/ j2 b2 F/ b (if (<= radmid 180) (setq order 8)
; i; h( B; y+ }" X0 F; _4 l" O/ Z (if (<= radmid 250) (setq order 9)0 D) o: k8 U* m* X* i0 E
(if (<= radmid 315) (setq order 10)# G4 L( A" x: X/ y0 p, o \# s
(if (<= radmid 400) (setq order 11)
6 F7 O$ B# j, t. A: v (if (<= radmid 500) (setq order 12)/ d4 p4 p' T' I, R8 s& n- o
)))))))))))))
5 M% s$ G+ v1 A (if (< threadpitch 0.25) (setq radmid (+ radmid (nth order 4H))) ; 根据螺距确定公差带' t7 |3 B4 g6 V6 J
(if (< threadpitch 0.35) (setq radmid (+ radmid (nth order 5H)))
5 ?6 V/ J& o. a( C Z (if (>= threadpitch 0.35) (setq radmid (+ radmid (nth order 6H)))- s2 @6 a0 h$ i
))); |! ]0 P6 b% v8 h+ x- x$ q& G
3 y. n9 S$ U) U( Z# ~ (setq h (* 0.866025 threadpitch)) ; 计算齿高
% r6 r! w6 \! H6 |- _& I7 x8 \ (setq radouter (+ radmid (/ h 4))) ; 计算外径
( G6 d* N* J4 c (setq radinner (- radouter (* h innerdiafactor))) ; 计算内径
7 Y! \+ O# v4 W2 f. s- t' w (setq threadangle (+ 30 0)) ; 计算齿顶角
3 t2 w. v* a5 d+ w+ W( O (auxithread radouter radmid radinner threadpitch threadlength threadangle ptStart) ; 调用绘制三维螺纹的子函数
: V; N; q( b, P: L2 x2 ` (princ "\n三维螺纹创建完成")
+ e2 L' m$ `$ A1 O+ e6 s" V (setvar "osmode" osmold) ; 恢复调用前的osmode系统变量值
9 I! q+ K8 e' B) y (setvar "cmdecho" ocmdold) ; 恢复调用前的cmdecho系统变量值4 {. m: d, t2 E1 l) H4 x; L
(princ)/ G0 W. a! W0 }5 v. F
)6 Q. ?9 R$ S( m4 x1 }
(defun auxithread (radouter radmid radinner threadpitch threadlength threadangle ptStart / ttal pt1z ang pt1a& W& v4 v6 a- f X0 W. E; Z
pt1az pt3a pt1b pt1bz pt3b pttmp1 pttmp2 pttmp3 pttmp4 pttmp5 pttmp6 pttmp7 pttmp8 pttmp9 pttmp10 pttmp11 pttmp12 tstmp startcone endcone)
4 m4 o' N- \/ r% o ;(command "undo" "begin") ; 开始undo步骤
8 V/ B8 A: G6 V, F) M {$ Z (setq ttal (+ (fix (/ (abs threadlength) threadpitch)) 3) y6 @" p8 h. Q# O9 \( K
pttmp1 (list (- (car ptStart) (/ radouter 2.0)) (cadr ptStart) (caddr ptStart))
" u. Q3 F: U g& i/ } pt1z (list (- (car ptStart) (/ radouter 2.0)) (cadr ptStart) (+ (caddr pttmp1) 1.0))
5 C7 m2 b; `( U% i, X: x pttmp2 (polar pttmp1 (/ (* threadangle pi) 180.0) 1)9 S' F7 R+ \$ f% N, |. i
pttmp3 (list (+ (car pttmp1) radouter) (+ (cadr pttmp1) (/ threadpitch 2.0)) (caddr ptStart))4 a+ Z7 Y- n( p. x8 C" ?
ang (angle pttmp1 pttmp3)
% E) p6 W. ~! B5 c pt1a (polar pttmp1 (+ ang (/ pi 2.0)) threadpitch)
% S. j$ k/ a4 c! @ pt1az (list (car pt1a) (cadr pt1a) (+ (caddr pt1a) 1.0))4 x4 A7 K5 T. t* K3 n
pt3a (polar pt1a ang radouter)9 \2 i1 h) w# w
pt1b (polar pttmp1 (- ang (/ pi 2.0)) threadpitch)
* q4 _; f; H- c pt1bz (list (car pt1b) (cadr pt1b) (+ (caddr pt1b) 1.0))' T- t; D1 K7 z/ a% i
pt3b (polar pt1b ang radouter)- `' e2 `4 y( m7 ?( s9 |/ n
pttmp4 (polar pttmp3 (/ (* (- 180 threadangle) pi) 180.0) 1)0 W# ?+ B8 A7 E y* J/ n# g# i
pttmp5 (inters pttmp1 pttmp2 pttmp3 pttmp4 nil)- m2 Q3 y# {/ W( s8 o7 I- w! Q
pttmp6 (list (car pttmp5) (cadr ptStart) (caddr ptStart))# }( ?. w5 o) A+ N
pttmp7 (polar pttmp1 (/ (* (- 360 threadangle) pi) 180.0) 1); q6 h* C% W c+ X! _/ W9 ]$ q# l( j
pttmp8 (polar pttmp3 (/ (* (+ 180 threadangle) pi) 180.0) 1)' F" V9 d6 A5 ~* y
pttmp9 (inters pttmp1 pttmp7 pttmp3 pttmp8 nil)
: p+ k, n+ U8 g0 u pttmp10 (list (car pttmp9) (cadr pttmp3) (caddr pttmp3))3 J: I1 T L3 x+ }; W
pttmp11 (polar ptStart (/ pi 2.0) threadpitch)
5 F1 W: } A$ s3 [7 ?& t& j7 j pttmp12 (polar pttmp11 (/ pi 2.0) (abs threadlength))
6 F3 @ l* O: j4 O8 @2 |- J* A )3 n; {8 {. d& u
;-------------------------------------------------------------------/ H5 E- ~: |/ c8 K
; 绘制两个倒置的并偏移1/2螺距的圆锥7 O2 b: ?/ u3 d7 f) _3 h
; 这两个圆锥都以中剖面剖分* r' W# n/ z1 \. ?$ u9 N! u* q( F) @
; 进行并集运算
/ r' J% E! R ]+ V1 x* k ;-------------------------------------------------------------------
7 l, z d* \4 y* `(SETQ startcone "order")1 {$ R2 [% B) t! u7 {
(SETQ endcone "Y")
" e; f+ p, E9 u. f7 W (command "zoom" "w" (list (car pt1a) (+ (cadr pt1a) (abs threadlength)) (caddr pt1a)) pt3b)
- i( e! J" x' x" k0 u; c (princ "\n正在绘制三维螺纹，请等待")7 w4 a% S4 L5 h3 \
(command "pline" pttmp1 pttmp5 pttmp6 "c")
* K5 j8 f- l! D+ X' |. u (command "revolve" "l" "" pttmp5 pttmp6 "")& ?6 r6 Y& X3 o+ b: q) U# G4 |
(command "slice" "l" "" pttmp1 pttmp3 pt1z pttmp5)) U! h( l# R% J
(command "slice" "l" "" pt1a pt3a pt1az pttmp3)7 W) }' f: c3 E7 w4 h8 c; M
(setq tstmp (ssadd (entlast))) h* w: u( f$ P8 l! y
(command "pline" pttmp3 pttmp9 pttmp10 "c"): T7 G, _( ?) J
(command "revolve" "l" "" pttmp9 pttmp10 "")
* Q" c( H( T3 k4 Y% { (command "slice" "l" "" pttmp1 pttmp3 pt1z pttmp9)2 l. a/ i$ Y7 m( u4 z
(command "slice" "l" "" pt1b pt3b pt1bz pttmp3)) O) Z6 D9 w3 s: c5 C
(setq tstmp (ssadd (entlast) tstmp))
+ k1 q4 d5 |6 @% @ (command "union" tstmp "")
" M' q. \0 C. \/ e4 }; `4 }; d3 @( k ;-------------------------------------------------------------------
% {1 n7 c( Q# i$ X7 L ; 上面的实体被剖切成两份，然后进行镜像以获得螺旋线的螺旋; ]* \+ c% W1 \* z2 s
; 单线的高度实际上等于两倍螺距，但是超出或者是在内部或者是
# Z8 k5 E" m& R* W7 G ; 在最后一步被切除! q j8 f$ Z( i0 A: d. I
;-------------------------------------------------------------------
2 r! P! D# ?. J9 K2 g (command "slice" tstmp "" "xy" ptStart "b")
* T, N6 p `# z+ k0 T5 I (setq tstmp (ssadd (entlast) tstmp)). h( m: c( W, \" ^' R. r/ ~% x O. [
(command "mirror" "l" "[email=]" pttmp1 "@10<0[/email]" "y")
% {8 v- }) w7 g! h) _% v% o (command "union" tstmp "")
' @+ x1 \; ]$ z; U) N* R ;-------------------------------------------------------------------: H! N# B5 R, T, [- K9 [
; 螺旋进行阵列操作，然后再作并集（可能会耗费一定时间）
$ G+ E0 l( x8 N: C( r( G0 S& K ; 得到的实体再切除到指定的螺旋高度
/ ?. @4 r) i! a7 b ;-------------------------------------------------------------------
; P, R4 `' J9 r. O (setq e (entlast))
$ L. r- ~! k7 w& U (command "array" tstmp "" "r" ttal 1 threadpitch)
: v" U. @! z& Z. { (repeat (1- ttal); k! X: B5 s( P
(setq e (entnext e)
9 v6 C1 A ]0 z7 k9 Z" {; s tstmp (ssadd e tstmp)
6 z1 f+ ?6 M& {; S4 F7 M )
2 ^/ B# E4 P% c9 W( P: x )
7 [' a/ T8 ]/ h* ]0 [* W (command "union" tstmp "")
! l W; {/ t9 q( K; 若开始创建45度的圆锥
/ ~, x7 p. r: @) ~9 N (if (/= startcone "order")
& J6 [$ U: a' { (progn (setq e (entlast))
; r* L# A8 J( F2 C (command "cone" (list (car ptStart) (+ (cadr ptStart) threadpitch) (caddr ptStart)) "d" radmid "a" (list (car ptStart) (+ (+ (cadr ptStart) (/ radmid 2)) threadpitch) (caddr ptStart)))3 s Z4 V* O4 E' P5 W
(command "union" "l" e "")
5 h5 Y5 T% o' K0 @ )
5 ?5 c' \/ W' m2 ]! g )
4 c2 X! \6 V/ h7 i. |& l (command "slice" "l" "" "zx" pttmp11 pttmp12)6 M+ @* t+ }& r9 h
(command "slice" "l" "" "zx" pttmp12 pttmp11)0 W+ T2 `( v: g6 s$ F
(command "move" "l" "" ptStart (list (car ptStart) (- (cadr ptStart) threadpitch) (caddr ptStart))) * V# O; J6 P& Y6 P
; 创建最小直径的圆柱体，然后与螺旋作交集- j* ]0 j; |) { t' `: E' t
(setq e (entlast))
3 q3 M# K3 x# d8 ~' _ (command "cylinder" ptStart "d" radinner "c" (list (car ptStart) (+ (cadr ptStart) (abs threadlength)) (caddr ptStart))): V0 S2 y7 J$ j8 g' S2 q
(command "union" "l" e ""); S+ W2 ]% s% m3 w; u N1 e
(setq tstmp (entlast))' b1 @; p, B, o0 |$ q/ v
; 创建中空的圆柱体
! X8 _9 v" @# C( u (command "cylinder" ptStart "d" radmid "c" (list (car ptStart) (+ (cadr ptStart) (abs threadlength)) (caddr ptStart))) ; minor dia
" o' a/ H! {* l (setq e (entlast))( h% G) u- G- F# K5 z' |
; 若最后创建45度的圆锥+ j4 d1 N% Z0 Q2 N" z
(if (/= endcone "order")
8 i* [6 I+ e4 v5 J; o1 c8 y4 k (progn (command "move" "l" "" ptStart (list (car ptStart) (- (cadr ptStart) (/ (- radmid radinner) 2)) (caddr ptStart))) , u1 ^2 o2 A% \+ P" e
(command "cone" ptStart "d" radmid "a" (list (car ptStart) (+ (cadr ptStart) (/ radmid 2)) (caddr ptStart)))
" p5 a2 @% R8 J% W (command "move" "l" "" ptStart (list (car ptStart) (- (+ (cadr ptStart) (abs threadlength)) (/ (- radmid radinner) 2)) (caddr ptStart)))
5 T4 U3 C6 \0 `+ W* b7 D (command "union" "l" e "")
% l7 B6 h. ]2 J+ r1 A) | (setq e (entlast)), T$ B$ j* a t1 M
)
$ Q- J$ Z- |9 K; G u- E8 x )& F- _: P/ Q4 m/ C- X
; 从大圆柱中减去小直径圆柱
# M" W& [/ F* [, w; G (command "cylinder" ptStart "d" (* radmid 1.5) "c" (list (car ptStart) (+ (cadr ptStart) (abs threadlength)) (caddr ptStart)))
2 [( f) u( u p+ Z) E- H6 L$ \3 n$ O+ H (command "subtract" "l" "" e "")1 y, ]# r6 K# o5 S0 p& a
(setq e (entlast))7 b6 T2 ^. H7 j
; 从螺旋中减去圆柱* x. n$ [# i2 N' z, b
(command "subtract" tstmp "" e "")6 ]8 I1 r9 j0 F
; 如果螺旋长度为负然后镜像# D% ^; s3 @9 F2 a, u: b4 A' H
(setq e (entlast))
- } H8 q' }8 B+ ~; d Z* U/ M5 s' ^ (if (< threadlength 0) (mirror3d e "zx" ptStart "y"))
- l8 B7 @ k* c1 a: ~0 U (command "zoom" "p")
, H6 F/ M% `. x( ]# N; (command "undo" "end") ; 结束undo步骤
+ b* M9 p* ^7 \)% ?! P l7 f# o: U7 b2 f8 I. G+ n
;;;---------------------------------------------------------------------------------------------------------------------;
3 Z( E' `9 \9 Q0 }/ v* T4 E) y(arxload "geom3d" nil)
" {6 _0 A9 T9 t# O+ B, Y9 d D) p(princ "\n3DThread 已加载。 ")0 Q$ N. W E: i ~2 S. Y
(princ) |
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发表于 2007-2-27 20:30:11
