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(defun errMsg (s)/ j1 U6 b" f2 R" l' I4 o
(if (/= s "function cancelled") (princ (strcat "\nError: " s)))
+ e# n! t$ D6 H/ c. a `' Q. M ; 当命令执行时出现错误* w) c5 f7 q' v+ j9 {0 v
(setvar "cmdecho" ocmdold) ; 例如用户按下了CTRL + C
2 r7 {4 ^' x8 v+ _ (setvar "osmode" osmold)8 f8 J8 R4 d, m- X/ R/ Z6 ^
(setq *error* olderr) ; 恢复旧的错误处理9 \6 T: Q( g7 a( T( L- E! [7 ^
(princ)
6 g( ?1 E! Y& r" A) R" F), r0 }. ]! G5 m( A: P
(defun c:3Dthread (/ radouter threadpitch threadlength threadangle
2 P& m* _: `' X1 a" V5 }$ m ptStart innerdiafactor radmid radinner ocmdold osmold 4H 5H 6H h6 g6)
+ ^/ d2 L4 z# z' h ;-------------------------------------------------------------------% _9 e# d7 o8 E4 n, X* O% N/ A
; 获取公制外径大小、螺距总长+ g$ @; F1 `& P
; 然后计算一系列几何点
5 c) z4 a; b) g0 Z ; 并且关闭对象捕捉、命令回显. T) h5 L$ W8 J! X
;-------------------------------------------------------------------2 N9 z/ ^8 T" q- [. _9 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))
" a: h, O. a+ ^/ c# n. d& k4 ?( W (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)) ! m. C. Z& D# v* z. t+ J s
(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)) + v6 R# d0 u2 b1 X4 Y
(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))
1 k& M. M7 S# m% w) o1 ~ (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))
6 l! S; A3 \* ^ Q! _) k9 s2 ^ (setq osmold (getvar "osmode")) ; 保存调用前的osmode系统变量值
9 U! s; Q$ K/ x (setq ocmdold (getvar "cmdecho")) ; 保存调用前的cmdecho系统变量值& z3 c2 I8 K# a4 ~6 V
(setvar "osmode" 0) ; 关闭对象捕捉
, M3 z* o$ q/ K/ L! h# ?4 [3 k (setvar "cmdecho" 0) ; 关闭命令的回显
- T6 m3 Z- O$ h: {3 g- Y ~ 0 b. o1 } V4 s" M
(setq innerdiafactor 1.5) ; 设置内径系数3 _* S# D* }9 N. {/ R& a E: Z7 ]
(initget 7) ; radmid 必须非零、非空、非负
' }% z# H1 ?& O9 y! E (setq radmid (getdist "\n公制外径: "))3 W1 ^. ?2 D1 _6 }2 {$ B# {5 F
(initget 7) ; threadpitch 必须非零、非空、非负
" M9 H1 x, o, ] x0 `- J (setq threadpitch (getreal "\n螺距: "))
, @! G! u" a7 Z6 h (initget 1) ; ptStart 必须非空
) F* o( [! J- x6 ~5 i: K (setq ptStart (getpoint "\n起始点: "))
4 M( E$ Q' y" j3 |6 V. s* R; ? (initget 3) ; threadlength 必须非零、非空、非负
' H, F* g# z+ Z4 z2 J# A$ @ (setq threadlength (getdist "\n螺纹总长(Y方向): "))2 G4 {' D: A0 p8 m6 |6 `
; 对公制外径添加公差
/ { a! T' F" N$ u* y/ W2 d. P (if (<= radmid 3) (setq order 0) ; 根据公制外径确定公差带中位置. R) Q+ f* G8 w3 J" l e, u+ R: E% B
(if (<= radmid 6) (setq order 1)
8 j- o- A2 z* K9 { (if (<= radmid 10) (setq order 2) h9 N# ~8 O y% r6 ?$ ^4 ^1 Q
(if (<= radmid 18) (setq order 3)
! P' {" r0 r! ]2 j1 I6 `, W (if (<= radmid 30) (setq order 4)
7 y$ Y; ~; w8 n3 k5 y3 m1 N (if (<= radmid 50) (setq order 5)
0 \! s6 A$ a* J) B$ E& | (if (<= radmid 80) (setq order 6)0 h4 q {' b6 S
(if (<= radmid 120) (setq order 7)
0 i' ?- I$ d, Q, w (if (<= radmid 180) (setq order 8)
6 r# F- L& j" i r% q1 D# Z (if (<= radmid 250) (setq order 9)
S- v/ y9 p6 L5 C Y7 C+ b2 ? (if (<= radmid 315) (setq order 10)- o( Y; N( H/ ^4 u/ v3 _
(if (<= radmid 400) (setq order 11)
, J/ q- G5 F' N1 D' l (if (<= radmid 500) (setq order 12)* j5 f# P4 x7 K9 p
)))))))))))))
& p6 Z5 d% r) `: i8 {1 Q (if (< threadpitch 0.25) (setq radmid (+ radmid (nth order 4H))) ; 根据螺距确定公差带& g( ]3 @; i! y2 N0 z) P
(if (< threadpitch 0.35) (setq radmid (+ radmid (nth order 5H)))
* s3 ]$ G v$ m3 G (if (>= threadpitch 0.35) (setq radmid (+ radmid (nth order 6H)))
; r. l; d( _2 b, \2 ~2 j )))2 k4 d. Z6 h3 ~ ]
: F8 D0 e+ o1 F0 W5 A" @ y2 a$ b
(setq h (* 0.866025 threadpitch)) ; 计算齿高4 R, w ]* ^, j) e9 m
(setq radouter (+ radmid (/ h 4))) ; 计算外径: L3 m/ {! g- [) u
(setq radinner (- radouter (* h innerdiafactor))) ; 计算内径
. i' d& B8 ]% B' S9 L (setq threadangle (+ 30 0)) ; 计算齿顶角: j4 j. i A7 y b9 Q
(auxithread radouter radmid radinner threadpitch threadlength threadangle ptStart) ; 调用绘制三维螺纹的子函数
3 c) U* R. @: F) x( K" v+ G& Y. F (princ "\n三维螺纹创建完成")
* o' R5 g3 G t6 ? (setvar "osmode" osmold) ; 恢复调用前的osmode系统变量值
& g2 h( t6 c# O% a% I; B' S: o( j% Z (setvar "cmdecho" ocmdold) ; 恢复调用前的cmdecho系统变量值' @( q- _7 `. `6 w1 b$ L
(princ)
/ Z/ B0 g4 p. d0 d6 }! ~)- M. Y, B7 n u2 r
(defun auxithread (radouter radmid radinner threadpitch threadlength threadangle ptStart / ttal pt1z ang pt1a; w" |9 o" w- d$ `
pt1az pt3a pt1b pt1bz pt3b pttmp1 pttmp2 pttmp3 pttmp4 pttmp5 pttmp6 pttmp7 pttmp8 pttmp9 pttmp10 pttmp11 pttmp12 tstmp startcone endcone)
6 m+ q: j! A5 J ;(command "undo" "begin") ; 开始undo步骤) O4 z. D, y4 s. K# g: h
(setq ttal (+ (fix (/ (abs threadlength) threadpitch)) 3); I# @; G$ i+ x
pttmp1 (list (- (car ptStart) (/ radouter 2.0)) (cadr ptStart) (caddr ptStart))
5 L# i2 `; R/ L' x3 P& U# l) l8 i pt1z (list (- (car ptStart) (/ radouter 2.0)) (cadr ptStart) (+ (caddr pttmp1) 1.0))& G+ T& F! P) b3 D6 `
pttmp2 (polar pttmp1 (/ (* threadangle pi) 180.0) 1)
: s: s( b, {+ y4 I9 l pttmp3 (list (+ (car pttmp1) radouter) (+ (cadr pttmp1) (/ threadpitch 2.0)) (caddr ptStart))" u$ h( k0 F5 i) c( P! Z
ang (angle pttmp1 pttmp3)
9 D. |2 C# y. s$ f) Q4 n9 n pt1a (polar pttmp1 (+ ang (/ pi 2.0)) threadpitch)
+ J Q9 Y9 w2 C9 @ pt1az (list (car pt1a) (cadr pt1a) (+ (caddr pt1a) 1.0))
, g' L: J2 H2 _, G pt3a (polar pt1a ang radouter)
0 A- L. |' m5 m r& \2 M( E) g pt1b (polar pttmp1 (- ang (/ pi 2.0)) threadpitch)/ y4 s/ Y% h+ ?2 x2 I
pt1bz (list (car pt1b) (cadr pt1b) (+ (caddr pt1b) 1.0))$ w3 d# w9 N0 R( w
pt3b (polar pt1b ang radouter)
4 ]$ O$ l) h s: O pttmp4 (polar pttmp3 (/ (* (- 180 threadangle) pi) 180.0) 1)
3 S6 F" P+ D' l# q1 @: F pttmp5 (inters pttmp1 pttmp2 pttmp3 pttmp4 nil), S& V+ w# K9 E9 `; a* P
pttmp6 (list (car pttmp5) (cadr ptStart) (caddr ptStart))
2 J8 Q$ r/ I+ y# T9 ^" ?6 O( } pttmp7 (polar pttmp1 (/ (* (- 360 threadangle) pi) 180.0) 1)
1 A9 F1 }% k4 ~' |' W" T pttmp8 (polar pttmp3 (/ (* (+ 180 threadangle) pi) 180.0) 1)
: E+ G7 i5 I2 Z" p; U+ x pttmp9 (inters pttmp1 pttmp7 pttmp3 pttmp8 nil)
3 b a2 C! j8 c2 Y6 M6 J pttmp10 (list (car pttmp9) (cadr pttmp3) (caddr pttmp3))
: [2 h& C/ H; J( N) o B pttmp11 (polar ptStart (/ pi 2.0) threadpitch), g/ ^5 P1 ~" b7 }" d
pttmp12 (polar pttmp11 (/ pi 2.0) (abs threadlength))/ A3 X, X- ^$ L9 P( T" b/ N
)% y( l5 e8 ?) n+ k3 `
;-------------------------------------------------------------------) R% M6 K. E; W/ s0 y/ X0 r- q u
; 绘制两个倒置的并偏移1/2螺距的圆锥
, m# D- S7 Z7 d( g' p: K ; 这两个圆锥都以中剖面剖分. ]; H. w+ c: o. P Q
; 进行并集运算" k& v* C1 N! e3 H
;-------------------------------------------------------------------) s8 O, A1 d% }2 F8 Y, X
(SETQ startcone "order")
/ i% p: O1 u _+ R* ~6 W$ W(SETQ endcone "Y")
* |3 A- }/ v" [ @+ z6 V s9 |# [* m8 A (command "zoom" "w" (list (car pt1a) (+ (cadr pt1a) (abs threadlength)) (caddr pt1a)) pt3b)
`/ A+ }( W0 d$ c5 _ (princ "\n正在绘制三维螺纹，请等待")
. S, U6 T' v- L2 [" a (command "pline" pttmp1 pttmp5 pttmp6 "c")
. l9 M$ [3 X' G1 ?0 y (command "revolve" "l" "" pttmp5 pttmp6 "")' V; j. H/ x+ Z8 n- |
(command "slice" "l" "" pttmp1 pttmp3 pt1z pttmp5)
$ S u/ P* ^6 R6 j7 Q! ~( l/ ? (command "slice" "l" "" pt1a pt3a pt1az pttmp3)
$ \- s) ?/ d0 F9 s" c9 Z (setq tstmp (ssadd (entlast)))
1 v# _: O6 g+ u% g (command "pline" pttmp3 pttmp9 pttmp10 "c")5 [5 i$ i. [- `( ]# O+ i( h
(command "revolve" "l" "" pttmp9 pttmp10 "")
6 |% X0 Q. w! S2 y; n9 K (command "slice" "l" "" pttmp1 pttmp3 pt1z pttmp9)
/ s- i$ C4 X( F. U2 i0 f' z (command "slice" "l" "" pt1b pt3b pt1bz pttmp3), ^- E6 E) x, e' ]; u; x
(setq tstmp (ssadd (entlast) tstmp))
3 c$ i S- w, p (command "union" tstmp "")" s: t. I- f- o7 a6 [' k; J
;-------------------------------------------------------------------+ Q O- s' U( @2 {" M
; 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1 {- o. F; P3 S2 p- }, Y2 \
; 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
3 M9 p" l9 M8 a, B1 z W% C( y ; 在最后一步被切除# G$ }8 j) k' _, c' R# v# s
;-------------------------------------------------------------------$ S. T6 u1 Q. s# x9 c$ Z- i/ M. F9 X
(command "slice" tstmp "" "xy" ptStart "b")
( O9 R* s- R: G; l1 f' w6 ` (setq tstmp (ssadd (entlast) tstmp))3 L$ v5 J& T( W- [- B$ C1 }
(command "mirror" "l" "[email=]" pttmp1 "@10<0[/email]" "y")
4 h, i: j8 x' P$ k (command "union" tstmp "")' f# O3 p9 Z" ?7 I: f A
;-------------------------------------------------------------------8 u+ A7 e% l* ^9 C+ `: s
; 螺旋进行阵列操作，然后再作并集（可能会耗费一定时间）
& ]" d' p# ~7 I! P1 r1 `, o) s ; 得到的实体再切除到指定的螺旋高度
6 l# C. X: J; T f" ]. y$ X ;-------------------------------------------------------------------! v6 u, @! v( K/ D7 B4 I
(setq e (entlast)), d7 B$ x( }( m) X/ y7 d: S; E1 c
(command "array" tstmp "" "r" ttal 1 threadpitch)' {& b4 @ G3 u' e' Z; B/ o
(repeat (1- ttal)5 {0 W$ G7 i" s0 O0 ~& n ]
(setq e (entnext e), z. u. ^. _1 d5 ~5 c! k C
tstmp (ssadd e tstmp)) j+ @& Y7 V0 z) Q/ h/ v; |
)
# u5 e+ v0 o- s' V7 w& _' Z# { )9 b3 v+ i9 O/ H! n4 J5 `
(command "union" tstmp "")
$ J: `& j9 g! o- C: O; 若开始创建45度的圆锥% |- T7 t6 J% {$ }$ L
(if (/= startcone "order")
' {" K* j: k9 L; m0 N2 p0 l (progn (setq e (entlast))
8 C) E! K- `3 B h4 F1 [/ u) `" I% P (command "cone" (list (car ptStart) (+ (cadr ptStart) threadpitch) (caddr ptStart)) "d" radmid "a" (list (car ptStart) (+ (+ (cadr ptStart) (/ radmid 2)) threadpitch) (caddr ptStart)))
4 O% {4 `/ Y6 A& a' C6 b (command "union" "l" e "")
$ M" M4 G& s# l' u )
2 t& Z3 D( v( D( B! i )
9 T$ \6 o$ h* J5 ? (command "slice" "l" "" "zx" pttmp11 pttmp12)0 J* K8 X. z/ l, V$ Z3 [/ G9 I% ]
(command "slice" "l" "" "zx" pttmp12 pttmp11)! I0 l# p: R5 y
(command "move" "l" "" ptStart (list (car ptStart) (- (cadr ptStart) threadpitch) (caddr ptStart)))
8 H5 O, L/ I$ X8 N% @$ a2 m( ]& |9 `) x, W; 创建最小直径的圆柱体，然后与螺旋作交集
2 j8 E2 B& L7 `0 [+ c (setq e (entlast))
& x0 }1 {' {% B9 L& ^ (command "cylinder" ptStart "d" radinner "c" (list (car ptStart) (+ (cadr ptStart) (abs threadlength)) (caddr ptStart)))
& Z2 \: K* W- H. m" E' O (command "union" "l" e "") F/ Z1 x7 l* H# z. g p: Z
(setq tstmp (entlast))/ l8 L8 o) [' r4 e3 r
; 创建中空的圆柱体
2 u' F( b1 |: Q4 ` (command "cylinder" ptStart "d" radmid "c" (list (car ptStart) (+ (cadr ptStart) (abs threadlength)) (caddr ptStart))) ; minor dia
U1 a* }$ G7 p8 T( ?4 g3 N/ f (setq e (entlast))
, G( s3 t: i w* `5 j) @; 若最后创建45度的圆锥, c! C; m. c* H/ `% I1 W+ r
(if (/= endcone "order")
. Z7 E3 d/ ]; ?3 V" A3 b: X (progn (command "move" "l" "" ptStart (list (car ptStart) (- (cadr ptStart) (/ (- radmid radinner) 2)) (caddr ptStart))) + P$ O% G' \" q* w! E
(command "cone" ptStart "d" radmid "a" (list (car ptStart) (+ (cadr ptStart) (/ radmid 2)) (caddr ptStart))) 8 T3 `( I1 o9 Z/ t; N' x6 u
(command "move" "l" "" ptStart (list (car ptStart) (- (+ (cadr ptStart) (abs threadlength)) (/ (- radmid radinner) 2)) (caddr ptStart)))+ e0 _8 @7 U$ u. L- a/ T; F( a
(command "union" "l" e "") 2 o& D' i& }4 x3 d0 ]( V
(setq e (entlast)) }* d3 C4 @5 s
) G+ ~4 n; ]3 C
)
0 D0 i. ~. v- O- Q+ N" Z5 v; 从大圆柱中减去小直径圆柱* o" d4 ]' [9 ]3 \
(command "cylinder" ptStart "d" (* radmid 1.5) "c" (list (car ptStart) (+ (cadr ptStart) (abs threadlength)) (caddr ptStart)))
( C" C d5 ~ U, S (command "subtract" "l" "" e "")
0 j" _! f% C7 S% l (setq e (entlast))/ j0 o9 |$ K( [& p
; 从螺旋中减去圆柱- p+ F/ P6 Q! j2 `6 s" {9 m
(command "subtract" tstmp "" e "")
, p! o ]4 v) m) s- N( d; 如果螺旋长度为负然后镜像, T6 T7 F1 y8 T( l
(setq e (entlast))
% p$ N3 [5 g3 o" b" d (if (< threadlength 0) (mirror3d e "zx" ptStart "y"))
; F0 ^1 |2 g& `0 ]/ f% e$ k( f' W (command "zoom" "p")
: f- z* @$ H0 e* F& Y/ ]; (command "undo" "end") ; 结束undo步骤 T& b, s: p8 i+ m f
). U+ u- _) I0 i5 E; D2 o
;;;---------------------------------------------------------------------------------------------------------------------;
: a" Y9 f) @" w: X7 R(arxload "geom3d" nil)
$ t/ E/ ]6 u9 j7 L& i4 G(princ "\n3DThread 已加载。 ")
7 T1 H: Z- f. x& H& @: Z+ X9 n(princ) |
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发表于 2007-2-27 20:30:11
