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(defun errMsg (s)
4 B$ B9 [! R$ P5 F% [; }, E (if (/= s "function cancelled") (princ (strcat "\nError: " s)))
. d1 x9 `( X$ N) O ; 当命令执行时出现错误
4 C0 {" r9 W2 f. e: z5 r# V$ } (setvar "cmdecho" ocmdold) ; 例如用户按下了CTRL + C
( E2 ?. r0 E3 ` (setvar "osmode" osmold)9 {* s, S( b j) G z$ w
(setq *error* olderr) ; 恢复旧的错误处理( s! t9 W# R+ q: g) g2 E
(princ)
' F3 Q1 t3 J, q" I) h& i). @. B; g5 R. q8 }
(defun c:3Dthread (/ radouter threadpitch threadlength threadangle
" l# ~* f, _7 a9 G# a' c1 j ptStart innerdiafactor radmid radinner ocmdold osmold 4H 5H 6H h6 g6)1 H2 |$ A: ^' _$ o+ Q% P3 W. x
;-------------------------------------------------------------------. F3 r: O3 e+ \% C4 E
; 获取公制外径大小、螺距总长
0 p8 c% R& C: y5 h: D; d ; 然后计算一系列几何点
3 {7 O+ ~& w+ }8 r# l, D. ]2 s1 t ; 并且关闭对象捕捉、命令回显6 U {3 G3 b$ q: W# j. j
;-------------------------------------------------------------------
" I" s1 I8 o; R+ g (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))
! z9 D9 @$ y3 m* 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))
% O b( q" T& N* f& | (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))
$ E5 Z% J3 H1 }" U. d+ } (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)) ( o7 C) a {1 e. Y
(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))
+ t. [8 M! r4 S. { (setq osmold (getvar "osmode")) ; 保存调用前的osmode系统变量值- R) ]: a1 L4 c& Q
(setq ocmdold (getvar "cmdecho")) ; 保存调用前的cmdecho系统变量值0 C V. r3 R& e( C. U& E. f. ?2 f
(setvar "osmode" 0) ; 关闭对象捕捉
: N. Q; ?1 B! d' E* }7 ~0 D (setvar "cmdecho" 0) ; 关闭命令的回显0 V7 Q3 B: K! t' {
( F: n4 R5 H3 s8 G
(setq innerdiafactor 1.5) ; 设置内径系数0 a2 Q4 z; C* Q
(initget 7) ; radmid 必须非零、非空、非负# p5 @& I- t! b9 ~, A5 s
(setq radmid (getdist "\n公制外径: "))
: z) \& S/ G$ j( ~* `8 H (initget 7) ; threadpitch 必须非零、非空、非负
1 P0 F& N8 ]6 R9 e0 A (setq threadpitch (getreal "\n螺距: "))4 I6 S5 O9 n5 q+ b0 O2 v, C
(initget 1) ; ptStart 必须非空
- O( R2 j- Z5 @ (setq ptStart (getpoint "\n起始点: "))
2 _- @4 {) Q9 e6 c y$ C' C (initget 3) ; threadlength 必须非零、非空、非负
* m! f1 [4 r) [* u (setq threadlength (getdist "\n螺纹总长(Y方向): "))
# E' f1 k8 x" q2 t: t9 C. \ `; 对公制外径添加公差
) X6 C! p" |/ l (if (<= radmid 3) (setq order 0) ; 根据公制外径确定公差带中位置$ U( @" g: n+ B; l% ?" r# q
(if (<= radmid 6) (setq order 1)! _+ b: m# C! O0 ]8 j$ Y" n: _
(if (<= radmid 10) (setq order 2)
) |: O y2 {, ^% T1 i% |) U0 G (if (<= radmid 18) (setq order 3): S) i2 B3 |+ y( ~5 _
(if (<= radmid 30) (setq order 4)4 ?: D- m" z. i
(if (<= radmid 50) (setq order 5)+ Q; f7 a% F7 v1 r+ o" I
(if (<= radmid 80) (setq order 6)% z( @9 H! k# w/ h' {' f0 h
(if (<= radmid 120) (setq order 7)1 o8 w5 U9 Y4 r# p
(if (<= radmid 180) (setq order 8): M6 K* @* h5 [8 h- F
(if (<= radmid 250) (setq order 9)! A$ |, n# p8 x/ |/ t
(if (<= radmid 315) (setq order 10)! D* G- N3 k7 g# j% K
(if (<= radmid 400) (setq order 11)$ t9 Q$ U' p4 W2 G1 y
(if (<= radmid 500) (setq order 12)/ h8 @# @& [- O: ^, A0 y
)))))))))))))" T; O% j/ t6 Z! `; a4 @9 C
(if (< threadpitch 0.25) (setq radmid (+ radmid (nth order 4H))) ; 根据螺距确定公差带# Y( k" s7 G2 j! t+ C; J3 B
(if (< threadpitch 0.35) (setq radmid (+ radmid (nth order 5H)))& i0 r( `8 x/ t: n2 ^, o' V
(if (>= threadpitch 0.35) (setq radmid (+ radmid (nth order 6H)))
8 H" `' K' ?' Y" o# u )))2 I2 R. d. \5 j
+ s' P6 h9 y( ^2 Z' g( V3 t q* { (setq h (* 0.866025 threadpitch)) ; 计算齿高
: |: H7 `+ L! y3 U4 p% z) x (setq radouter (+ radmid (/ h 4))) ; 计算外径& R$ t6 K8 \+ @; f- a n
(setq radinner (- radouter (* h innerdiafactor))) ; 计算内径
, f4 z, p# _4 \ (setq threadangle (+ 30 0)) ; 计算齿顶角; J: |* \) M9 N% I8 w; e6 Q
(auxithread radouter radmid radinner threadpitch threadlength threadangle ptStart) ; 调用绘制三维螺纹的子函数2 d( w6 m: ~2 R+ f! s' V! P
(princ "\n三维螺纹创建完成"); ]3 C+ \2 T- g
(setvar "osmode" osmold) ; 恢复调用前的osmode系统变量值
: M+ b" \: m" z3 ?# `. B" J) g (setvar "cmdecho" ocmdold) ; 恢复调用前的cmdecho系统变量值5 i" i5 N1 c5 j: e
(princ)$ W X* a5 @1 o
)
( Y* B& F* T# a- e9 l: A(defun auxithread (radouter radmid radinner threadpitch threadlength threadangle ptStart / ttal pt1z ang pt1a6 f; Q1 o& @" f2 ^# K, C
pt1az pt3a pt1b pt1bz pt3b pttmp1 pttmp2 pttmp3 pttmp4 pttmp5 pttmp6 pttmp7 pttmp8 pttmp9 pttmp10 pttmp11 pttmp12 tstmp startcone endcone)
& X1 v2 A& A+ u% G7 G ;(command "undo" "begin") ; 开始undo步骤
5 U1 \2 [7 Y' L( j" C& y) { (setq ttal (+ (fix (/ (abs threadlength) threadpitch)) 3)( j* i0 [; v1 n& ~
pttmp1 (list (- (car ptStart) (/ radouter 2.0)) (cadr ptStart) (caddr ptStart))
6 a& u- B' l6 v/ A( Q, i pt1z (list (- (car ptStart) (/ radouter 2.0)) (cadr ptStart) (+ (caddr pttmp1) 1.0))% F: J4 c5 x! K2 I6 a4 ], k
pttmp2 (polar pttmp1 (/ (* threadangle pi) 180.0) 1)
5 l: K; P* S) w5 H0 {1 J. R4 C6 X9 D pttmp3 (list (+ (car pttmp1) radouter) (+ (cadr pttmp1) (/ threadpitch 2.0)) (caddr ptStart))
- ]6 B5 r! k ~+ t& r ang (angle pttmp1 pttmp3)8 W# P9 w& \5 l- _
pt1a (polar pttmp1 (+ ang (/ pi 2.0)) threadpitch)/ O& V$ K X: b: B# l7 @
pt1az (list (car pt1a) (cadr pt1a) (+ (caddr pt1a) 1.0))
8 i7 _ q {. f" y- q8 V pt3a (polar pt1a ang radouter)
! j l( r; ?8 u1 V, X5 @ pt1b (polar pttmp1 (- ang (/ pi 2.0)) threadpitch). d3 Z, h+ P- c2 i% `0 V
pt1bz (list (car pt1b) (cadr pt1b) (+ (caddr pt1b) 1.0))* R; f7 @' K2 Z0 x, U
pt3b (polar pt1b ang radouter)
2 L9 b: b- B+ X8 }2 ^ pttmp4 (polar pttmp3 (/ (* (- 180 threadangle) pi) 180.0) 1)
( a, H; B2 q9 N9 p' [ pttmp5 (inters pttmp1 pttmp2 pttmp3 pttmp4 nil)2 e$ F; y9 J9 e, B) P. I/ e
pttmp6 (list (car pttmp5) (cadr ptStart) (caddr ptStart))8 u9 }* c( w+ u9 O1 D
pttmp7 (polar pttmp1 (/ (* (- 360 threadangle) pi) 180.0) 1)
" m( N( O* g$ Y2 ?- e4 `2 |' A/ g' ]$ ^ pttmp8 (polar pttmp3 (/ (* (+ 180 threadangle) pi) 180.0) 1)
& l% a0 a' h3 X, j pttmp9 (inters pttmp1 pttmp7 pttmp3 pttmp8 nil)
4 m; |0 @; \1 P2 I5 F Q! V pttmp10 (list (car pttmp9) (cadr pttmp3) (caddr pttmp3))
/ f5 x! K" p" g7 ~. P! Y$ W pttmp11 (polar ptStart (/ pi 2.0) threadpitch)# C5 F8 V3 i$ L5 g J( `
pttmp12 (polar pttmp11 (/ pi 2.0) (abs threadlength))
- B5 G- }. w3 @* ~7 b! } )2 B: t: s2 c* |- m9 m. f4 z) C
;-------------------------------------------------------------------
$ g$ s3 T- m! S. v' ^: e0 U6 y% T ; 绘制两个倒置的并偏移1/2螺距的圆锥
. x7 d2 m: [) @6 U/ j ; 这两个圆锥都以中剖面剖分
% A4 ?6 a% p3 O* g8 Y4 ?( Q$ h2 j& ` ; 进行并集运算
R" m$ h+ x9 z( i/ F ;-------------------------------------------------------------------$ e9 i3 L# [. v
(SETQ startcone "order")* r# h8 ]& I: n, g
(SETQ endcone "Y")5 a7 {' N+ O8 V( c
(command "zoom" "w" (list (car pt1a) (+ (cadr pt1a) (abs threadlength)) (caddr pt1a)) pt3b)0 G4 F. _* p1 W9 g, d2 N; B
(princ "\n正在绘制三维螺纹，请等待")
: W8 s/ C4 F& q, _0 z3 V (command "pline" pttmp1 pttmp5 pttmp6 "c")3 H6 ~0 Y, ?; p( e5 }. b( Y' @2 `
(command "revolve" "l" "" pttmp5 pttmp6 "")' q7 s" q0 a# B9 ^, ?6 i- P
(command "slice" "l" "" pttmp1 pttmp3 pt1z pttmp5)+ _! U" i! x n6 o- d
(command "slice" "l" "" pt1a pt3a pt1az pttmp3)
* m5 m2 c3 ~# Z$ {6 M/ ` (setq tstmp (ssadd (entlast))) D$ B9 j: @/ o) N0 U1 D: @
(command "pline" pttmp3 pttmp9 pttmp10 "c")7 R/ d1 K4 ]# h, E: W; S
(command "revolve" "l" "" pttmp9 pttmp10 "")" J2 N; w$ y9 |7 p
(command "slice" "l" "" pttmp1 pttmp3 pt1z pttmp9)+ k6 h6 q" ^' D0 F C8 _. |8 j& R
(command "slice" "l" "" pt1b pt3b pt1bz pttmp3)9 E% |6 Y3 m6 O, D# @ z! ]/ y/ ^
(setq tstmp (ssadd (entlast) tstmp))
1 u4 T: d( R. J* v+ W- q (command "union" tstmp "")) I8 f8 `* C/ u3 F/ i
;-------------------------------------------------------------------
# F1 I# a5 B# d9 D8 p* E# o! H ; 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
# Q3 V: o& m8 P: a* c' j ; 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5 [" }: ?) ?+ |) l4 s
; 在最后一步被切除
W7 N- U; \9 c5 q4 K! |1 T+ h) v; a" t2 y ;-------------------------------------------------------------------- |! J8 W8 A( t
(command "slice" tstmp "" "xy" ptStart "b")% w2 i* E" f4 P! |, T" u5 H$ M, I
(setq tstmp (ssadd (entlast) tstmp))0 @# ~! ?3 F5 N, r0 ]6 a
(command "mirror" "l" "[email=]" pttmp1 "@10<0[/email]" "y")" j+ L% d7 i8 {% ]0 C3 M% |& W
(command "union" tstmp "")7 I4 H+ Y A' v4 ~0 w" q( L
;-------------------------------------------------------------------, @% T& I' E, x
; 螺旋进行阵列操作，然后再作并集（可能会耗费一定时间）4 {2 |& m- y* a' T8 {
; 得到的实体再切除到指定的螺旋高度( O @& S! p, B& u6 p( R) S
;-------------------------------------------------------------------
( C' r5 Z1 I) _" b# P- c! T* ? (setq e (entlast))
. G, V. E4 F3 _' G2 G4 j (command "array" tstmp "" "r" ttal 1 threadpitch)
5 t; c+ L; C$ H2 r (repeat (1- ttal)
+ D- N. ]# c7 i( f) h+ Y (setq e (entnext e)0 U# g, b" M' ^* `; M' q- o5 N+ Z
tstmp (ssadd e tstmp)/ E6 k& n+ O$ i1 ^/ T& ~
)( ?9 L7 N: k z' |* \* G7 X
)+ y' s% O& m5 k- Q n& O8 l
(command "union" tstmp "")+ J9 {6 R7 P! `
; 若开始创建45度的圆锥
0 j# Z2 {# B5 _+ f+ C (if (/= startcone "order")9 d5 F& D5 ~+ V/ t/ D" X, b
(progn (setq e (entlast))$ l( X& G3 Q: p
(command "cone" (list (car ptStart) (+ (cadr ptStart) threadpitch) (caddr ptStart)) "d" radmid "a" (list (car ptStart) (+ (+ (cadr ptStart) (/ radmid 2)) threadpitch) (caddr ptStart))). ~' {2 C& h: p" Q, m+ l$ t
(command "union" "l" e "")% q4 U: ~2 T" l" w
)
0 _8 p* A) o1 G) n% }1 ]8 W+ d )2 L& Q5 A) J( E! D! {
(command "slice" "l" "" "zx" pttmp11 pttmp12). p2 k: M" C2 P+ H" {( X) a
(command "slice" "l" "" "zx" pttmp12 pttmp11)$ l1 _& O" O* J& x/ p( x0 m# g
(command "move" "l" "" ptStart (list (car ptStart) (- (cadr ptStart) threadpitch) (caddr ptStart))) t( n" U9 q4 i& K- n9 m& T
; 创建最小直径的圆柱体，然后与螺旋作交集; i& T' N1 c+ d1 f+ F& k
(setq e (entlast))
) c5 W& \* J1 N (command "cylinder" ptStart "d" radinner "c" (list (car ptStart) (+ (cadr ptStart) (abs threadlength)) (caddr ptStart)))0 x# y- J m9 P7 h: o, x! W
(command "union" "l" e "")4 R/ t6 c$ r/ \( r: W# ~1 c; e
(setq tstmp (entlast)). Q5 h& J2 m- B5 Z3 }/ z5 ~0 _
; 创建中空的圆柱体+ ~0 m) K" _/ X7 ]# U9 F
(command "cylinder" ptStart "d" radmid "c" (list (car ptStart) (+ (cadr ptStart) (abs threadlength)) (caddr ptStart))) ; minor dia, u$ W% o5 P6 B" V9 W7 G+ X) b
(setq e (entlast))$ D- N( m& t8 Q: [. p' o6 W# U
; 若最后创建45度的圆锥
2 z; K! k3 z$ P* W2 _" T' q (if (/= endcone "order")
' \; w: P# x: J) s ]3 X3 F$ @ (progn (command "move" "l" "" ptStart (list (car ptStart) (- (cadr ptStart) (/ (- radmid radinner) 2)) (caddr ptStart))) 8 I; P g6 f4 M* R5 ?( }
(command "cone" ptStart "d" radmid "a" (list (car ptStart) (+ (cadr ptStart) (/ radmid 2)) (caddr ptStart))) 8 b; \+ }9 Y6 M4 K# M5 `3 B; W6 _4 T
(command "move" "l" "" ptStart (list (car ptStart) (- (+ (cadr ptStart) (abs threadlength)) (/ (- radmid radinner) 2)) (caddr ptStart)))( m+ U5 j- z# `+ o! f, x K. V
(command "union" "l" e "") 6 f; y; v2 h* X [
(setq e (entlast))
. v8 B/ @9 j4 @* Q, m7 C )
% {& F" `# b$ {" C )
; d' a1 c2 g9 r/ f( E; 从大圆柱中减去小直径圆柱0 e2 f+ Z! i- r$ s) D7 u0 d+ \
(command "cylinder" ptStart "d" (* radmid 1.5) "c" (list (car ptStart) (+ (cadr ptStart) (abs threadlength)) (caddr ptStart))) Z* Z( I. ]) V, t7 d9 i1 X; g7 r
(command "subtract" "l" "" e "")
- f* y2 f" B5 g6 J9 v! }5 N (setq e (entlast))
2 ?7 E' V' u% z+ k5 j; 从螺旋中减去圆柱
/ H4 i" L( K8 k" H' _% x (command "subtract" tstmp "" e "")) f1 ~; t2 g: ~# ~1 ]/ i& K
; 如果螺旋长度为负然后镜像
) C& d& G- @4 h (setq e (entlast))0 l% y* D3 @& X
(if (< threadlength 0) (mirror3d e "zx" ptStart "y"))
7 l$ Q. ~# B: h8 _$ K% }. |' a (command "zoom" "p")
+ \5 ^+ X( G; ~3 b4 ]& s; (command "undo" "end") ; 结束undo步骤. R K- A: `' y
)# b, {6 E7 s- C- [0 d
;;;---------------------------------------------------------------------------------------------------------------------;2 C! W Z K+ j0 K9 |( u: u0 _
(arxload "geom3d" nil)( ?1 R( l0 J& H, S! v
(princ "\n3DThread 已加载。 ")
J( [& y7 @) W+ C(princ) |
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发表于 2007-2-27 20:30:11
