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(defun errMsg (s)
3 t2 D, w* E2 S2 P0 L. E8 a (if (/= s "function cancelled") (princ (strcat "\nError: " s)))
2 T8 Y/ }! b$ ?' m# J& x* \ ; 当命令执行时出现错误
0 o7 A, y! _: w/ v' H. t (setvar "cmdecho" ocmdold) ; 例如用户按下了CTRL + C
0 t" M1 F( ~9 V (setvar "osmode" osmold)" A- k. }1 P, `0 B, Z/ Q
(setq *error* olderr) ; 恢复旧的错误处理
* w5 Y1 G, y; n5 z4 v! v (princ); R: R) f/ \5 y- f% P
)
4 p* ?& K; d* X- F(defun c:3Dthread (/ radouter threadpitch threadlength threadangle
- w! k: y; B J: G ptStart innerdiafactor radmid radinner ocmdold osmold 4H 5H 6H h6 g6)( F! a0 l" Z7 ~# D
;-------------------------------------------------------------------
- t5 v) ^8 o/ }# I T ; 获取公制外径大小、螺距总长
" F- w# ~- A' _+ \ ; 然后计算一系列几何点7 c. Q q/ d. ?7 Z- D- J9 ]9 \, W
; 并且关闭对象捕捉、命令回显
! @! Q( D, q4 O' R' P7 P" G( E: b ;-------------------------------------------------------------------% C( y' Y. ^. Q6 h1 }
(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)) ! r, E% @8 g2 m' C, d/ Q: W' v# t
(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))
: e# P; F5 ]3 | (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)) & g8 o8 C% B8 h
(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)) " Q3 h' n0 [' m$ P
(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))
3 q- M7 e& E, X8 z& `' C: v (setq osmold (getvar "osmode")) ; 保存调用前的osmode系统变量值
1 V8 S. j A; c' C1 Z+ m. J, | (setq ocmdold (getvar "cmdecho")) ; 保存调用前的cmdecho系统变量值
" C5 \$ m5 t; F7 A4 E& J2 G (setvar "osmode" 0) ; 关闭对象捕捉
9 a: F- W, a# r2 _+ @) R- o' O (setvar "cmdecho" 0) ; 关闭命令的回显
' r2 R+ q) z" r* ?; | ! o7 `: Y! ?6 U6 }7 \6 B1 g
(setq innerdiafactor 1.5) ; 设置内径系数
" A: ?( L7 D- T) y( t, L (initget 7) ; radmid 必须非零、非空、非负" W! T9 s! H n- B1 I
(setq radmid (getdist "\n公制外径: "))+ A5 X0 l- J l
(initget 7) ; threadpitch 必须非零、非空、非负
& f; R$ x R, w% d1 _& q0 H% j2 v$ j (setq threadpitch (getreal "\n螺距: "))2 C' ^! S5 t$ B" m
(initget 1) ; ptStart 必须非空" t k0 ~, i H
(setq ptStart (getpoint "\n起始点: "))3 u* ~5 n8 q1 E) m9 r
(initget 3) ; threadlength 必须非零、非空、非负
, s& i7 C) |5 o, |7 u! h (setq threadlength (getdist "\n螺纹总长(Y方向): "))
6 R; O/ t( y( X2 l% U1 i8 ]0 V; 对公制外径添加公差
" c; w9 O3 ]5 `8 ]* e3 ^5 U, d (if (<= radmid 3) (setq order 0) ; 根据公制外径确定公差带中位置7 a- Y6 i1 q a7 c9 R2 v
(if (<= radmid 6) (setq order 1)
3 l$ p& t* k, l) H3 n (if (<= radmid 10) (setq order 2)
" J+ m- ?( B$ @/ u- s8 d/ W6 ^1 g2 s (if (<= radmid 18) (setq order 3)2 Z" ^1 q* |( H6 |$ ?4 G. M, f
(if (<= radmid 30) (setq order 4)- c6 p: p, v3 F2 _; }
(if (<= radmid 50) (setq order 5)
3 N) d! ~0 P% H1 n$ c (if (<= radmid 80) (setq order 6)
& d7 P# m/ i: x4 a- K4 x( L ? (if (<= radmid 120) (setq order 7)
( B$ a" k/ U8 G0 v) r2 I (if (<= radmid 180) (setq order 8), r" N# B& l' B, T8 i! A4 }8 D
(if (<= radmid 250) (setq order 9)
1 a* v# F7 @8 C$ Q/ E (if (<= radmid 315) (setq order 10); |- j/ T; Y- n; J1 L9 O
(if (<= radmid 400) (setq order 11)! N" o; j4 {! B/ b7 q, w
(if (<= radmid 500) (setq order 12) w: `2 ?& g- i) s: Q1 I' P
)))))))))))))) t5 T5 z9 r8 g! G
(if (< threadpitch 0.25) (setq radmid (+ radmid (nth order 4H))) ; 根据螺距确定公差带
3 ?: j& D7 t. v* U; z) }: P (if (< threadpitch 0.35) (setq radmid (+ radmid (nth order 5H)))
% F1 F. c/ J8 U (if (>= threadpitch 0.35) (setq radmid (+ radmid (nth order 6H)))
- }1 O9 t* X/ n# S. \ )))
9 h( x' ?! i6 _6 S6 P6 O) h , y( T' g# N8 ^+ C5 @* X& L5 t
(setq h (* 0.866025 threadpitch)) ; 计算齿高2 S# U' {) Y+ N" N' S. @
(setq radouter (+ radmid (/ h 4))) ; 计算外径: }: k% j( Z4 t' U
(setq radinner (- radouter (* h innerdiafactor))) ; 计算内径
! E' m& Q( J" b& a5 B (setq threadangle (+ 30 0)) ; 计算齿顶角9 ?; d5 j1 q; c: i
(auxithread radouter radmid radinner threadpitch threadlength threadangle ptStart) ; 调用绘制三维螺纹的子函数
! ^5 O9 M/ Q2 [0 ^+ F% O) F (princ "\n三维螺纹创建完成")
) m4 j0 `1 n7 ]5 [. V! ]& e (setvar "osmode" osmold) ; 恢复调用前的osmode系统变量值0 ?7 A% P% C3 Y/ T# U. w
(setvar "cmdecho" ocmdold) ; 恢复调用前的cmdecho系统变量值
) s* [( f3 F& k" C (princ)5 [+ t- _* l9 |$ ^
)
; C( N; |, P7 t! [4 x2 F: Q(defun auxithread (radouter radmid radinner threadpitch threadlength threadangle ptStart / ttal pt1z ang pt1a
( H# I; a/ U* h4 w/ `8 qpt1az pt3a pt1b pt1bz pt3b pttmp1 pttmp2 pttmp3 pttmp4 pttmp5 pttmp6 pttmp7 pttmp8 pttmp9 pttmp10 pttmp11 pttmp12 tstmp startcone endcone)! t) h! v; T7 f1 N
;(command "undo" "begin") ; 开始undo步骤6 j6 M: C, Y( v5 H# }$ _$ x
(setq ttal (+ (fix (/ (abs threadlength) threadpitch)) 3)
3 j6 W" Q/ h2 {0 F pttmp1 (list (- (car ptStart) (/ radouter 2.0)) (cadr ptStart) (caddr ptStart))
0 w8 \# f8 ^7 J6 z pt1z (list (- (car ptStart) (/ radouter 2.0)) (cadr ptStart) (+ (caddr pttmp1) 1.0))
" E% C% n" C+ ~" s4 I# N pttmp2 (polar pttmp1 (/ (* threadangle pi) 180.0) 1)
0 J9 K- \& E* I# Z' j; q; W: f pttmp3 (list (+ (car pttmp1) radouter) (+ (cadr pttmp1) (/ threadpitch 2.0)) (caddr ptStart))
$ P( W; v# F* G, g7 \ ang (angle pttmp1 pttmp3)
1 M0 _, q* a9 L. M pt1a (polar pttmp1 (+ ang (/ pi 2.0)) threadpitch)
3 s Q5 q/ j( p pt1az (list (car pt1a) (cadr pt1a) (+ (caddr pt1a) 1.0))8 Y3 r8 g$ \2 O% c q" [- c# Q
pt3a (polar pt1a ang radouter)
& c; L6 e3 {( I @ E/ ?: o3 ~% R pt1b (polar pttmp1 (- ang (/ pi 2.0)) threadpitch)
+ H5 o/ i9 `5 ]2 } pt1bz (list (car pt1b) (cadr pt1b) (+ (caddr pt1b) 1.0))
/ \( `2 h: ^; X: v pt3b (polar pt1b ang radouter)
9 a9 L4 w! G& ~8 H pttmp4 (polar pttmp3 (/ (* (- 180 threadangle) pi) 180.0) 1)
( w0 C- j& ]& e pttmp5 (inters pttmp1 pttmp2 pttmp3 pttmp4 nil); S1 x, C8 X! U% `/ v
pttmp6 (list (car pttmp5) (cadr ptStart) (caddr ptStart))' I# O/ \- J* v3 K" x
pttmp7 (polar pttmp1 (/ (* (- 360 threadangle) pi) 180.0) 1)* G1 l1 r# A7 h
pttmp8 (polar pttmp3 (/ (* (+ 180 threadangle) pi) 180.0) 1)7 e2 `8 i. R) r" T2 _' x
pttmp9 (inters pttmp1 pttmp7 pttmp3 pttmp8 nil)
0 O; |# A% e: k! ^( d pttmp10 (list (car pttmp9) (cadr pttmp3) (caddr pttmp3))
; N5 x* a9 ]* Z( G pttmp11 (polar ptStart (/ pi 2.0) threadpitch)
g9 x0 Z( t% `2 o" ?0 ? pttmp12 (polar pttmp11 (/ pi 2.0) (abs threadlength))
3 r% N% H- p& ?% D' c' s )2 H! n \3 H3 V
;------------------------------------------------------------------- ~, v5 A+ W5 g. y9 X5 G/ K0 ?
; 绘制两个倒置的并偏移1/2螺距的圆锥/ B9 G: n" ~1 c* u, Z
; 这两个圆锥都以中剖面剖分2 @: ?( S1 B- ^' |9 T B
; 进行并集运算4 \0 h' w2 U* r' u! w- }! C+ ^: ]
;-------------------------------------------------------------------( {" Z. K! r# H. g! o) E
(SETQ startcone "order")
& l% b7 ?( [% q, |2 Y1 w(SETQ endcone "Y")' e2 o- u6 {( d D* @4 p
(command "zoom" "w" (list (car pt1a) (+ (cadr pt1a) (abs threadlength)) (caddr pt1a)) pt3b): ]/ C: g6 |$ f
(princ "\n正在绘制三维螺纹，请等待"), P, S ^$ O* p: j' E& F- D( i
(command "pline" pttmp1 pttmp5 pttmp6 "c")
6 C) z+ [& K- y. D7 ^% W (command "revolve" "l" "" pttmp5 pttmp6 "")) ?4 v* Y& L) h
(command "slice" "l" "" pttmp1 pttmp3 pt1z pttmp5)
r' v$ m, N/ @ (command "slice" "l" "" pt1a pt3a pt1az pttmp3)- @: X2 J/ |% W( K9 W$ e7 I( T
(setq tstmp (ssadd (entlast)))
! p# f) S: j& ~- x (command "pline" pttmp3 pttmp9 pttmp10 "c")7 M( N+ a! l: @6 K B
(command "revolve" "l" "" pttmp9 pttmp10 "")
; ]- K6 _4 v0 s3 f! R+ o (command "slice" "l" "" pttmp1 pttmp3 pt1z pttmp9)) c% l0 K! P% d$ }2 [# V2 T
(command "slice" "l" "" pt1b pt3b pt1bz pttmp3)
4 S3 J0 ]5 z( b1 U1 X# L (setq tstmp (ssadd (entlast) tstmp))- Y- d+ ]$ U2 y, e
(command "union" tstmp "")! y) v0 N& B8 c* E
;-------------------------------------------------------------------0 F, [. f3 R" y9 F! K6 Z& e
; 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0 C$ t; f9 `0 Y' Q2 Z" H y
; 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) x" |2 [$ E: p( V1 p
; 在最后一步被切除
0 ~6 F$ z* @8 l7 B' X ;-------------------------------------------------------------------" X3 X1 Q9 I# @* e0 e- `# X5 s
(command "slice" tstmp "" "xy" ptStart "b")( [* `5 c5 p# K3 S2 T/ o+ u
(setq tstmp (ssadd (entlast) tstmp))
5 K# N3 c, c# K3 I& l (command "mirror" "l" "[email=]" pttmp1 "@10<0[/email]" "y")
+ z+ k% ~( l5 g' k, j/ E' j( z& e1 q (command "union" tstmp "")
- X" ^3 L k( {6 w" e ;-------------------------------------------------------------------
6 ^8 V) @+ Z0 p _# G8 G6 C1 F8 Z& F7 p& R ; 螺旋进行阵列操作，然后再作并集（可能会耗费一定时间）
2 G6 K, J) v+ J* b" m6 X ; 得到的实体再切除到指定的螺旋高度# v' e& f3 r% V+ p% F
;-------------------------------------------------------------------! V7 V1 j- \) G8 k/ N
(setq e (entlast))% p5 ~% u# G( _1 N6 C+ R
(command "array" tstmp "" "r" ttal 1 threadpitch)
5 m$ J! n+ z) r; F% a (repeat (1- ttal)
- I) u( }) n2 l- V9 s (setq e (entnext e)
& H; z7 n: x1 [2 z7 O& ~ tstmp (ssadd e tstmp) p! d: Q- W- y$ {/ _* \8 B: O
)
: J/ ^5 a8 p/ g( h- z- {4 K )
6 ?6 b: |. O5 s! H. l4 t (command "union" tstmp "")
8 K6 K% U1 p2 H; 若开始创建45度的圆锥8 P0 K2 W" U$ g6 z
(if (/= startcone "order")
5 P1 |- k4 d- y4 i4 s$ J7 w' T (progn (setq e (entlast))
$ ^! u. S7 V% w5 f- I0 W- B (command "cone" (list (car ptStart) (+ (cadr ptStart) threadpitch) (caddr ptStart)) "d" radmid "a" (list (car ptStart) (+ (+ (cadr ptStart) (/ radmid 2)) threadpitch) (caddr ptStart))). b0 ]# \# q8 A" T$ G
(command "union" "l" e "")) q2 q& T% G/ f" R. H# \
)4 I+ \4 @' J; _( E$ G: p
)
4 ]1 D) M! U, \3 _! | (command "slice" "l" "" "zx" pttmp11 pttmp12)
. `7 m L9 w: i8 u4 C/ H$ }2 u/ l (command "slice" "l" "" "zx" pttmp12 pttmp11)2 }0 N5 }2 F. V- {* b
(command "move" "l" "" ptStart (list (car ptStart) (- (cadr ptStart) threadpitch) (caddr ptStart))) : c3 P. J, p5 E$ s; B" g, _' y
; 创建最小直径的圆柱体，然后与螺旋作交集6 ?$ I' z E; h" Z; x) I
(setq e (entlast))3 `- L Y: ^$ H& _
(command "cylinder" ptStart "d" radinner "c" (list (car ptStart) (+ (cadr ptStart) (abs threadlength)) (caddr ptStart)))+ b0 C7 E- f8 |! M
(command "union" "l" e "")
8 M) K+ q* |' b! l8 B& v7 K2 R (setq tstmp (entlast))
4 c% k5 j1 c) ]% D) V4 K; 创建中空的圆柱体' k7 d- k2 U! M: t( U' w- h6 L0 B7 q
(command "cylinder" ptStart "d" radmid "c" (list (car ptStart) (+ (cadr ptStart) (abs threadlength)) (caddr ptStart))) ; minor dia4 U+ C6 l+ n2 o
(setq e (entlast))" s9 s' d# N1 ~: j$ M" K
; 若最后创建45度的圆锥" [# a; d7 `. I9 O- S
(if (/= endcone "order")
$ a: |3 ^" f6 w (progn (command "move" "l" "" ptStart (list (car ptStart) (- (cadr ptStart) (/ (- radmid radinner) 2)) (caddr ptStart))) ' b; o2 b/ u; P6 f4 n/ `
(command "cone" ptStart "d" radmid "a" (list (car ptStart) (+ (cadr ptStart) (/ radmid 2)) (caddr ptStart))) 3 Y# p( x7 L! A! a# x
(command "move" "l" "" ptStart (list (car ptStart) (- (+ (cadr ptStart) (abs threadlength)) (/ (- radmid radinner) 2)) (caddr ptStart)))3 A* K' J% l9 q* O7 V6 h4 \
(command "union" "l" e "") ) e- i+ a% ~/ g/ |- u
(setq e (entlast))
! s8 {. H/ z' w% X: @5 ^; v )2 z; o- p" A- Y1 d& s. B3 v
)0 _, v! R5 U6 c* d: f! H! y1 i! j
; 从大圆柱中减去小直径圆柱
; e" N0 m O" M! I/ w: T (command "cylinder" ptStart "d" (* radmid 1.5) "c" (list (car ptStart) (+ (cadr ptStart) (abs threadlength)) (caddr ptStart)))
8 [- a" s8 g' f3 r: Y (command "subtract" "l" "" e "")& X6 ?* R8 p9 u5 C
(setq e (entlast))
3 `$ U7 t3 ~6 v' ^; L% J! M; 从螺旋中减去圆柱& \; Q T# L3 x
(command "subtract" tstmp "" e "")
* ~; u/ h# E c$ \0 n) q- |3 A; 如果螺旋长度为负然后镜像
7 h' d+ @+ d1 D. s8 p (setq e (entlast))
2 O8 e) @# v# C4 A% P (if (< threadlength 0) (mirror3d e "zx" ptStart "y"))
& v7 A4 Z& m: S+ X5 t& r) d2 c; |: S (command "zoom" "p")
- n2 C! N6 H& z* @7 m0 K& n; (command "undo" "end") ; 结束undo步骤+ H& H, h. O& { f2 i- ]
)
o4 T& ]& G% [. S5 b;;;---------------------------------------------------------------------------------------------------------------------;
9 i5 B( P3 a8 v0 w2 k0 P(arxload "geom3d" nil)
3 L! i0 Y$ @% @9 V(princ "\n3DThread 已加载。 "). J. G. n# ?1 T- r- a
(princ) |
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发表于 2007-2-27 20:30:11
