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(defun errMsg (s)& a8 |% ] V8 m" ?8 Z
(if (/= s "function cancelled") (princ (strcat "\nError: " s)))
( u/ h. H) B) z5 P/ P ; 当命令执行时出现错误6 U/ N6 W6 S6 l* L9 ^% O
(setvar "cmdecho" ocmdold) ; 例如用户按下了CTRL + C
, S! z+ A) \' _ G (setvar "osmode" osmold), N9 ^4 d% E) D
(setq *error* olderr) ; 恢复旧的错误处理( _7 q9 R" t) D
(princ)$ c( ]/ A1 y3 } g
)
2 b2 s3 l1 i# C( R0 b( d5 o/ i(defun c:3Dthread (/ radouter threadpitch threadlength threadangle
0 p2 S/ S5 T5 r& E/ b4 Q ptStart innerdiafactor radmid radinner ocmdold osmold 4H 5H 6H h6 g6)
- ^+ c( w) R& \( \! Q* B ;-------------------------------------------------------------------4 u) u& G( a( F. c9 A7 J( C
; 获取公制外径大小、螺距总长" Q$ `! p+ {9 u' M$ f7 \7 {
; 然后计算一系列几何点3 V- w2 p9 a( H N* F3 W, c
; 并且关闭对象捕捉、命令回显
7 h: Z/ H! v2 U. C/ y* X4 T; H( W ;-------------------------------------------------------------------0 I) W! r2 A* t5 Y
(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)) x1 S8 _6 N1 M @4 x( J& P
(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))
- Q) ]# M6 m. L* S g (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)) : o1 {. u- d0 F* o
(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)) ( l$ y8 w }( \" ~; j0 u
(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))
: @5 F# a9 W4 ?: }% {! A (setq osmold (getvar "osmode")) ; 保存调用前的osmode系统变量值
) g; H- c+ b; g* S" g) z& I (setq ocmdold (getvar "cmdecho")) ; 保存调用前的cmdecho系统变量值
0 p; y5 g5 k/ q8 z7 Z (setvar "osmode" 0) ; 关闭对象捕捉
& _- M7 r1 M( n8 d# c0 u (setvar "cmdecho" 0) ; 关闭命令的回显8 h3 C) U, U9 L& [/ W0 i
- e5 t1 K0 I4 T: @: g# q9 U( w' s
(setq innerdiafactor 1.5) ; 设置内径系数) C' M' o) _* o1 x3 n% i& u( j. z
(initget 7) ; radmid 必须非零、非空、非负7 Z$ e2 {( w {" @
(setq radmid (getdist "\n公制外径: "))
- Y- `, J7 ]# ~ (initget 7) ; threadpitch 必须非零、非空、非负* {3 E. n" F9 d$ V( E
(setq threadpitch (getreal "\n螺距: "))' l$ P: R' P; Y6 |$ _
(initget 1) ; ptStart 必须非空
' G& q9 }$ n9 R& b+ z+ { (setq ptStart (getpoint "\n起始点: "))
0 V5 G* D1 }- n9 G0 J) u" u* ` (initget 3) ; threadlength 必须非零、非空、非负
}( `* i# O6 r& d (setq threadlength (getdist "\n螺纹总长(Y方向): "))9 r. d' c& u3 e! h" S
; 对公制外径添加公差) g) g3 t/ @' e* m4 E( d
(if (<= radmid 3) (setq order 0) ; 根据公制外径确定公差带中位置
/ a$ F9 {: w% w0 W5 j; ^ (if (<= radmid 6) (setq order 1)
1 o9 O$ o5 y; A3 _9 f* t, G (if (<= radmid 10) (setq order 2)
8 @5 s% l( o, V1 R3 L (if (<= radmid 18) (setq order 3)
; h$ {, g8 h" t v (if (<= radmid 30) (setq order 4)
3 ]+ L/ [1 Y/ m' N% G1 @ (if (<= radmid 50) (setq order 5)2 C! r0 q: _/ V- C
(if (<= radmid 80) (setq order 6)/ d: o8 T" W8 I, H( M+ ^
(if (<= radmid 120) (setq order 7)
X# c& r* F9 g/ b7 W (if (<= radmid 180) (setq order 8)
8 h# `7 s: n* W' W4 n+ Q& [1 I (if (<= radmid 250) (setq order 9)
9 {2 ~6 Z/ Z5 b( Z) I Z# [ (if (<= radmid 315) (setq order 10)
! ~. [& L: u D (if (<= radmid 400) (setq order 11)
6 J, @1 j' V' r (if (<= radmid 500) (setq order 12)
3 v8 c6 F4 E% w0 z" k )))))))))))))
N E" @( I3 _# {* t (if (< threadpitch 0.25) (setq radmid (+ radmid (nth order 4H))) ; 根据螺距确定公差带2 f: `4 }8 G, I8 D
(if (< threadpitch 0.35) (setq radmid (+ radmid (nth order 5H)))
4 [( [' j3 w. x$ |: Y( F (if (>= threadpitch 0.35) (setq radmid (+ radmid (nth order 6H)))
' D% M& I; v9 I* a! B )))
' t9 E0 `. ]0 Z9 T
! @' W# s" t' Q7 C (setq h (* 0.866025 threadpitch)) ; 计算齿高
* ^# g3 K: e6 v2 }8 T( i (setq radouter (+ radmid (/ h 4))) ; 计算外径
6 Q* D4 z' I4 s# s! {$ ? (setq radinner (- radouter (* h innerdiafactor))) ; 计算内径
; L( d1 m; X. n$ D$ H" ^ (setq threadangle (+ 30 0)) ; 计算齿顶角7 V( ^0 D7 O# D" f# `$ W. f+ W
(auxithread radouter radmid radinner threadpitch threadlength threadangle ptStart) ; 调用绘制三维螺纹的子函数
7 ^0 I4 a- L$ w# | (princ "\n三维螺纹创建完成")
$ ~ m5 y9 c* u+ U (setvar "osmode" osmold) ; 恢复调用前的osmode系统变量值
! @, t% P, j$ B; I7 d2 c (setvar "cmdecho" ocmdold) ; 恢复调用前的cmdecho系统变量值/ n) V8 A% _& @
(princ)# c( _ p4 `" }
)
+ U6 W3 `. f4 E& a" Q5 J, f+ X0 P* k(defun auxithread (radouter radmid radinner threadpitch threadlength threadangle ptStart / ttal pt1z ang pt1a" ]) Q$ B. ^" Z6 s# C- K
pt1az pt3a pt1b pt1bz pt3b pttmp1 pttmp2 pttmp3 pttmp4 pttmp5 pttmp6 pttmp7 pttmp8 pttmp9 pttmp10 pttmp11 pttmp12 tstmp startcone endcone)
) `8 ]1 L! |1 f* x. O Q ;(command "undo" "begin") ; 开始undo步骤. |. N4 c/ O$ d& H
(setq ttal (+ (fix (/ (abs threadlength) threadpitch)) 3)0 Q; G( L9 x. T0 [
pttmp1 (list (- (car ptStart) (/ radouter 2.0)) (cadr ptStart) (caddr ptStart))4 n( X( K* Y, f* n) O1 l
pt1z (list (- (car ptStart) (/ radouter 2.0)) (cadr ptStart) (+ (caddr pttmp1) 1.0))
! L2 D8 y- Y: ?& N2 e' q4 l pttmp2 (polar pttmp1 (/ (* threadangle pi) 180.0) 1)8 A( [1 ~1 A1 O3 ?- A9 s: _: [
pttmp3 (list (+ (car pttmp1) radouter) (+ (cadr pttmp1) (/ threadpitch 2.0)) (caddr ptStart))# T; u: k" \9 r: `
ang (angle pttmp1 pttmp3)4 s8 u8 R* `6 r; p2 ]
pt1a (polar pttmp1 (+ ang (/ pi 2.0)) threadpitch)1 @4 a. A/ K$ u$ T/ N, u. \
pt1az (list (car pt1a) (cadr pt1a) (+ (caddr pt1a) 1.0))+ k8 T# O4 r4 X$ r+ U$ R% U; ?: v
pt3a (polar pt1a ang radouter)& K" X# V6 x# y) U' E1 Q; B
pt1b (polar pttmp1 (- ang (/ pi 2.0)) threadpitch)
& A8 S1 j, B0 e0 \" r) R9 x pt1bz (list (car pt1b) (cadr pt1b) (+ (caddr pt1b) 1.0))3 U) @$ G& K# ~- p1 x
pt3b (polar pt1b ang radouter)
7 |3 y1 I: Q4 `& X& z pttmp4 (polar pttmp3 (/ (* (- 180 threadangle) pi) 180.0) 1)9 e5 n% w9 @( ]: B; {
pttmp5 (inters pttmp1 pttmp2 pttmp3 pttmp4 nil)/ F0 O7 H7 y0 w& Z5 x* Y* P9 O
pttmp6 (list (car pttmp5) (cadr ptStart) (caddr ptStart))
I( K: Z, d" ^% ~. L pttmp7 (polar pttmp1 (/ (* (- 360 threadangle) pi) 180.0) 1)6 D* a/ C! W& K. k/ W* e, }
pttmp8 (polar pttmp3 (/ (* (+ 180 threadangle) pi) 180.0) 1)0 f- m5 Q: Z$ ]# z s' q
pttmp9 (inters pttmp1 pttmp7 pttmp3 pttmp8 nil)
" ?* Y6 d0 j+ O5 l3 ^" B0 q. J pttmp10 (list (car pttmp9) (cadr pttmp3) (caddr pttmp3)). R% h: p0 _/ h# Z" l' ?
pttmp11 (polar ptStart (/ pi 2.0) threadpitch)
$ Q' Z ^- j+ y pttmp12 (polar pttmp11 (/ pi 2.0) (abs threadlength))0 B* b; t* H, ]" K
)
8 p. S- V% N. J" F, X8 C) V, ~ ;-------------------------------------------------------------------- W' @" }5 N1 [5 X
; 绘制两个倒置的并偏移1/2螺距的圆锥, x! Q& h: a9 y4 [
; 这两个圆锥都以中剖面剖分- ]6 k3 y8 n) d4 Z" k1 A
; 进行并集运算% y4 d: W; m( ?5 B7 }$ F' Q# c+ v! o/ b
;-------------------------------------------------------------------! T& Q* q+ g$ q! U$ O K
(SETQ startcone "order")
; _* f+ B$ \- |( T4 V0 S(SETQ endcone "Y")' U, `! S; F+ C) ~! `* y
(command "zoom" "w" (list (car pt1a) (+ (cadr pt1a) (abs threadlength)) (caddr pt1a)) pt3b)% ?5 y7 v- n3 u. p7 |1 q
(princ "\n正在绘制三维螺纹，请等待")2 G. ?# h6 ]. U+ Z2 u$ \
(command "pline" pttmp1 pttmp5 pttmp6 "c"): V' }) D9 x* N3 e
(command "revolve" "l" "" pttmp5 pttmp6 "")
/ L; B' e3 G7 Y. _- S: p0 O! G0 V (command "slice" "l" "" pttmp1 pttmp3 pt1z pttmp5)1 C( ]9 }% q; k8 j$ M. Y
(command "slice" "l" "" pt1a pt3a pt1az pttmp3)
6 i4 L4 } \7 e4 s5 c- g [ (setq tstmp (ssadd (entlast)))
8 e) ~4 \' s+ v, | (command "pline" pttmp3 pttmp9 pttmp10 "c")
8 |) p* J* [' [# ]/ w' a. I (command "revolve" "l" "" pttmp9 pttmp10 "")
, \( j& _, G$ W/ l; Q( D9 `( [4 i (command "slice" "l" "" pttmp1 pttmp3 pt1z pttmp9)
1 b( u4 v$ o& f# K) E (command "slice" "l" "" pt1b pt3b pt1bz pttmp3)
! T4 F) s( C! t0 u" P (setq tstmp (ssadd (entlast) tstmp))$ {5 |+ C ^, G$ g. ^" t8 v
(command "union" tstmp "")! j ]$ N C! D6 n+ Y- c
;-------------------------------------------------------------------4 r0 d* R9 e& r! {( w5 \+ d
; 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
/ Z( C: t' o- j$ K ; 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
+ E/ i, \7 b( o* ?# v4 p8 a' H/ C {" v ; 在最后一步被切除2 b/ d* A# X; o* p1 Y; y, `0 J9 m
;-------------------------------------------------------------------
) ?8 v7 A# z& B) @2 K (command "slice" tstmp "" "xy" ptStart "b")
6 @3 b; U6 N+ p (setq tstmp (ssadd (entlast) tstmp))) k8 B/ ?/ e' C1 ?
(command "mirror" "l" "[email=]" pttmp1 "@10<0[/email]" "y")
$ m% ?7 b" y; d% b n5 Q P; V$ } (command "union" tstmp "")3 X0 v1 h2 u9 A3 F* ^# }
;-------------------------------------------------------------------- \+ z3 @3 p# r4 `# t% M. g; g
; 螺旋进行阵列操作，然后再作并集（可能会耗费一定时间）) e/ l; x+ K* U4 ?
; 得到的实体再切除到指定的螺旋高度# y$ h( m- O, l1 u% j; h `2 j: f
;-------------------------------------------------------------------
: N5 n& r5 O0 ^; c; ]$ } (setq e (entlast))0 }" \2 v7 V' r. a) o
(command "array" tstmp "" "r" ttal 1 threadpitch)+ ~/ f2 E5 ^. o1 n" z* H: _$ Y
(repeat (1- ttal)' Z0 a! n" t4 P$ _' Y
(setq e (entnext e)7 |6 B4 _4 b% s( O, ^5 \
tstmp (ssadd e tstmp)5 Y5 w( H4 k, _
)9 m5 q4 C% k; |- Q, Z3 Y/ z
)5 ?, T+ U+ {. M) g
(command "union" tstmp "")
+ F6 i" o: ?# z# L4 ~; 若开始创建45度的圆锥
( e! K1 D7 o% v (if (/= startcone "order")
; k9 a% D' m8 P! F4 N7 B (progn (setq e (entlast))% m% e# h5 c6 [; H, I/ e
(command "cone" (list (car ptStart) (+ (cadr ptStart) threadpitch) (caddr ptStart)) "d" radmid "a" (list (car ptStart) (+ (+ (cadr ptStart) (/ radmid 2)) threadpitch) (caddr ptStart)))+ o$ E6 T ~: l1 q8 c
(command "union" "l" e "")
8 m, {8 M% m. | p7 _ )
1 `% x- H" O- ` G$ X3 x2 F )
9 Z' y) F# P; \6 n# d. t (command "slice" "l" "" "zx" pttmp11 pttmp12)3 E' |: ^4 k/ F4 f9 M
(command "slice" "l" "" "zx" pttmp12 pttmp11)
3 u& O& D# j* _$ A$ e (command "move" "l" "" ptStart (list (car ptStart) (- (cadr ptStart) threadpitch) (caddr ptStart)))
6 T6 x7 M5 h+ G- F& t) P" g; 创建最小直径的圆柱体，然后与螺旋作交集
8 d8 x+ h7 V$ ?6 ? (setq e (entlast))* T% Y5 k# ~5 f) X
(command "cylinder" ptStart "d" radinner "c" (list (car ptStart) (+ (cadr ptStart) (abs threadlength)) (caddr ptStart)))/ f- C9 s z# e2 G
(command "union" "l" e "")# j7 N, }/ d8 z# _2 Q( V. n
(setq tstmp (entlast))4 U c" u* h) y) V, \3 \
; 创建中空的圆柱体
+ ~8 T# `: U/ k# U8 P, j (command "cylinder" ptStart "d" radmid "c" (list (car ptStart) (+ (cadr ptStart) (abs threadlength)) (caddr ptStart))) ; minor dia
7 o: ?8 z5 O4 K( e3 K' s (setq e (entlast))9 b/ C' z. \$ D
; 若最后创建45度的圆锥
& D) W! R% a! x! u0 ` (if (/= endcone "order")
+ n5 p3 N# d" L (progn (command "move" "l" "" ptStart (list (car ptStart) (- (cadr ptStart) (/ (- radmid radinner) 2)) (caddr ptStart)))
0 I3 ^) D! _4 l: F) @. ~ (command "cone" ptStart "d" radmid "a" (list (car ptStart) (+ (cadr ptStart) (/ radmid 2)) (caddr ptStart))) ; d. k. z( z. f9 w5 ]( X) F
(command "move" "l" "" ptStart (list (car ptStart) (- (+ (cadr ptStart) (abs threadlength)) (/ (- radmid radinner) 2)) (caddr ptStart)))0 S; `( B8 F7 M% ^. Y/ A. g
(command "union" "l" e "") 5 Q0 g# g+ Z% A/ Q- ?) Q( V
(setq e (entlast))
; g; U! l9 h# k! T/ _6 Z) _8 v. y )8 x5 F$ A. m! J5 c2 \8 w
)
K' Y! R1 u z i0 E; 从大圆柱中减去小直径圆柱
- M: P% H7 {' P, ~* l' O1 H (command "cylinder" ptStart "d" (* radmid 1.5) "c" (list (car ptStart) (+ (cadr ptStart) (abs threadlength)) (caddr ptStart)))3 P6 _+ T- J1 h0 ?3 _( |9 f1 Y* t
(command "subtract" "l" "" e "")* k& i9 F( u: @# _/ j: _" Q/ x
(setq e (entlast))
! s. q# q* d; e9 H& M/ q; 从螺旋中减去圆柱
/ ~* r4 l; g9 Z# h8 W" U (command "subtract" tstmp "" e "")" `: {7 }! c% P% i" k% o& a
; 如果螺旋长度为负然后镜像
' w* b5 O9 o! n% j0 i4 ?' d0 d" b+ L (setq e (entlast))& v' A" c; V2 Y
(if (< threadlength 0) (mirror3d e "zx" ptStart "y"))
A' W6 e7 ^+ G: i8 j4 Q5 p% s (command "zoom" "p")% M9 h6 C( s% y7 M. |
; (command "undo" "end") ; 结束undo步骤 _* T; v/ i' C7 J/ y: G& h1 m
)0 ?9 S% j' ~' |5 S! I' F) L, `
;;;---------------------------------------------------------------------------------------------------------------------;) q$ `+ y0 [# i) ?7 k3 \
(arxload "geom3d" nil)
/ {6 |- U' _/ T# e/ ?4 Q(princ "\n3DThread 已加载。 ")
! V- O/ W- e+ Q(princ) |
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发表于 2007-2-27 20:30:11
