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(defun errMsg (s)8 ?2 Y9 k) @. k3 R/ s& k# J0 p1 _
(if (/= s "function cancelled") (princ (strcat "\nError: " s))), u; a. E" s# Q' B2 z0 W" Y2 Z
; 当命令执行时出现错误, X) ~; X8 d" T
(setvar "cmdecho" ocmdold) ; 例如用户按下了CTRL + C
1 W! C9 |2 Z4 k5 x (setvar "osmode" osmold)
4 n' m y `- d$ Q4 f (setq *error* olderr) ; 恢复旧的错误处理) L( p; a& G: Z% j* ?7 x' T
(princ). N8 T) C' x% [0 ~1 @- `
)
; C9 C! M! ~( N% }" A) S( Z(defun c:3Dthread (/ radouter threadpitch threadlength threadangle
# E. P8 v5 S Q1 H6 ~7 Z ptStart innerdiafactor radmid radinner ocmdold osmold 4H 5H 6H h6 g6)
9 f7 [) j, E% h9 ?0 ` ;-------------------------------------------------------------------
$ v X2 |& P* S- g7 E1 G ; 获取公制外径大小、螺距总长( v) G1 R1 h T2 a: r
; 然后计算一系列几何点
* i( |( ?( N! P* e9 U' x6 n$ F ; 并且关闭对象捕捉、命令回显
/ k) Y- N6 s0 r2 q% n ;-------------------------------------------------------------------
0 j+ Y: ?0 p# K- O' b (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))
( O7 v( `2 B- f" d7 x# A (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))
" s& f/ H& ~8 `/ b& 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)) . q# n: K+ h ^0 X* F' Q* G, V, N& X
(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)) . l5 `2 j; D( m/ F3 q' k
(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))
# |: L5 s4 Y4 d. Z0 J$ { (setq osmold (getvar "osmode")) ; 保存调用前的osmode系统变量值' {, @3 {' A& O, `5 }; o
(setq ocmdold (getvar "cmdecho")) ; 保存调用前的cmdecho系统变量值
1 ~9 {1 a3 g8 C5 l8 M5 f (setvar "osmode" 0) ; 关闭对象捕捉 l/ _1 X8 C1 d' F. p* P8 J
(setvar "cmdecho" 0) ; 关闭命令的回显; P! o# ]5 _( t5 l4 G
: z3 L: E7 r& F: G, Y* w (setq innerdiafactor 1.5) ; 设置内径系数7 ^& B3 i* n* C% \- x* k: e! }
(initget 7) ; radmid 必须非零、非空、非负
6 i/ k! ^. \; L2 t (setq radmid (getdist "\n公制外径: "))
4 a; R6 ^+ |6 {" E% z% G (initget 7) ; threadpitch 必须非零、非空、非负4 J* C2 a- h& X" x. C: ^
(setq threadpitch (getreal "\n螺距: "))/ N9 Y4 `0 Z" f8 v
(initget 1) ; ptStart 必须非空( h5 t/ c# ?! u- \" A: Y- e# M
(setq ptStart (getpoint "\n起始点: "))
* y3 l0 Y6 }% h M: b (initget 3) ; threadlength 必须非零、非空、非负% l6 e$ R3 X' P u6 r4 ^7 N
(setq threadlength (getdist "\n螺纹总长(Y方向): "))6 `0 h/ p3 ?) o. E( B
; 对公制外径添加公差
0 O$ g" _6 T2 w9 h (if (<= radmid 3) (setq order 0) ; 根据公制外径确定公差带中位置5 E; F& i# H, \# s2 m! K
(if (<= radmid 6) (setq order 1)% p+ d3 k# B5 j) r" B
(if (<= radmid 10) (setq order 2)
5 O3 {! s7 L M (if (<= radmid 18) (setq order 3)
9 [! i" a( O6 c (if (<= radmid 30) (setq order 4)3 m" ]: m+ e- A1 }5 t
(if (<= radmid 50) (setq order 5)
3 s& u9 |) k, o! D; P, ^6 Z (if (<= radmid 80) (setq order 6)0 U# S3 X7 a" L9 M( x
(if (<= radmid 120) (setq order 7)
/ c5 m* h% q7 T (if (<= radmid 180) (setq order 8): J6 @* R. Y' M' ?" @" E, p8 q4 l: z! w
(if (<= radmid 250) (setq order 9)
7 Q' L2 E+ L6 Q* c+ H# |( E$ f (if (<= radmid 315) (setq order 10)
' h' r6 K8 n6 w (if (<= radmid 400) (setq order 11)2 F- z( { G! ~; m0 Y+ {; L+ K9 ]
(if (<= radmid 500) (setq order 12)
& l) K' N7 Z& w0 w5 P, R" c )))))))))))))! [0 v2 Q' K1 I1 @
(if (< threadpitch 0.25) (setq radmid (+ radmid (nth order 4H))) ; 根据螺距确定公差带
( g$ X* b. U2 L8 i3 m$ L (if (< threadpitch 0.35) (setq radmid (+ radmid (nth order 5H)))2 ^1 V5 M) x9 d' _* Z
(if (>= threadpitch 0.35) (setq radmid (+ radmid (nth order 6H)))
2 X8 f" r& _; Y* G% z& _' W5 Z )))3 v0 O+ s/ D/ v1 ?# ?. b* ?8 \
$ v' B4 E5 g) w. l
(setq h (* 0.866025 threadpitch)) ; 计算齿高
$ g$ C* Y/ W- i (setq radouter (+ radmid (/ h 4))) ; 计算外径) x/ j5 f& R- @/ V
(setq radinner (- radouter (* h innerdiafactor))) ; 计算内径
) ^- D# t9 d3 A5 C% S0 a: o3 X2 R (setq threadangle (+ 30 0)) ; 计算齿顶角% @5 y. C9 Q) A
(auxithread radouter radmid radinner threadpitch threadlength threadangle ptStart) ; 调用绘制三维螺纹的子函数6 j. S* y4 `8 P/ V
(princ "\n三维螺纹创建完成")
" f5 ` z/ }; C0 N$ S. E (setvar "osmode" osmold) ; 恢复调用前的osmode系统变量值6 a* E( _, J% p# {) A7 S
(setvar "cmdecho" ocmdold) ; 恢复调用前的cmdecho系统变量值
( [0 K4 M: d1 d5 ]6 X (princ)( a6 e1 W4 I" q# V) I# v
)% Y8 C: m9 l b7 V* i
(defun auxithread (radouter radmid radinner threadpitch threadlength threadangle ptStart / ttal pt1z ang pt1a
+ Q' Z) ^6 }4 r3 ^6 J5 | x2 A) _pt1az pt3a pt1b pt1bz pt3b pttmp1 pttmp2 pttmp3 pttmp4 pttmp5 pttmp6 pttmp7 pttmp8 pttmp9 pttmp10 pttmp11 pttmp12 tstmp startcone endcone)
, a. ` z" K4 T! Q; p) ] X& d ;(command "undo" "begin") ; 开始undo步骤
2 ]$ n9 X! O4 M) g (setq ttal (+ (fix (/ (abs threadlength) threadpitch)) 3)" Q2 y, i! T4 ?! `; K
pttmp1 (list (- (car ptStart) (/ radouter 2.0)) (cadr ptStart) (caddr ptStart))
' j' W2 n+ a1 ?# E8 S& E. x pt1z (list (- (car ptStart) (/ radouter 2.0)) (cadr ptStart) (+ (caddr pttmp1) 1.0))0 s. z- \: {. K# W8 h- G
pttmp2 (polar pttmp1 (/ (* threadangle pi) 180.0) 1)0 V l+ O# H) N
pttmp3 (list (+ (car pttmp1) radouter) (+ (cadr pttmp1) (/ threadpitch 2.0)) (caddr ptStart))
: ` }6 K1 |: a' `) f+ g @) D ang (angle pttmp1 pttmp3)
0 Q# i/ {7 {! H8 V; j3 M* z9 d pt1a (polar pttmp1 (+ ang (/ pi 2.0)) threadpitch)! ~0 m* q7 {, m$ M: f j4 K" P
pt1az (list (car pt1a) (cadr pt1a) (+ (caddr pt1a) 1.0))
1 p/ \9 V4 y$ w) U7 R' H( [ pt3a (polar pt1a ang radouter)4 J' q2 t+ [) E; n* C
pt1b (polar pttmp1 (- ang (/ pi 2.0)) threadpitch)
4 `7 B* J1 k! p/ H+ E/ X* k: G, V" U pt1bz (list (car pt1b) (cadr pt1b) (+ (caddr pt1b) 1.0))8 K( N3 m% O; p+ R( {/ {
pt3b (polar pt1b ang radouter)6 X: L# @, o9 S9 x! p5 @; S
pttmp4 (polar pttmp3 (/ (* (- 180 threadangle) pi) 180.0) 1)4 s8 ~- R$ H3 Z B+ {# R4 w
pttmp5 (inters pttmp1 pttmp2 pttmp3 pttmp4 nil)
* {; q% I9 ]! h7 f: J5 W+ b) P pttmp6 (list (car pttmp5) (cadr ptStart) (caddr ptStart))) F/ @7 `5 P* K( ~" U4 Z
pttmp7 (polar pttmp1 (/ (* (- 360 threadangle) pi) 180.0) 1)$ ?1 y# J/ n" x! c! w" G
pttmp8 (polar pttmp3 (/ (* (+ 180 threadangle) pi) 180.0) 1)' R/ M! P1 b7 B' x0 y
pttmp9 (inters pttmp1 pttmp7 pttmp3 pttmp8 nil)( c2 ^+ O) w1 {; t" G- \9 J
pttmp10 (list (car pttmp9) (cadr pttmp3) (caddr pttmp3))
2 O* F1 G% o- e' i! u pttmp11 (polar ptStart (/ pi 2.0) threadpitch)
0 ~1 }5 z* x+ v8 e. {, a1 e7 k; E1 F pttmp12 (polar pttmp11 (/ pi 2.0) (abs threadlength))& {$ }. O% b8 X- `; C
)
1 b" X$ R8 k! v4 o7 _/ L$ ?. Z6 ? ;-------------------------------------------------------------------5 n; o$ Q% |! `- X' `# P
; 绘制两个倒置的并偏移1/2螺距的圆锥
* s# g" x' o' ?( Z t& D; W7 I ; 这两个圆锥都以中剖面剖分/ [0 r) e R! s& _% n/ ?/ V
; 进行并集运算
" e& ]4 f- C% a ;-------------------------------------------------------------------) f- k1 S) \7 i5 J2 I& A6 @9 G# b
(SETQ startcone "order")
' Y1 W, M, T2 U r G! M; }(SETQ endcone "Y")
" C n2 i6 T ~; o/ `1 f (command "zoom" "w" (list (car pt1a) (+ (cadr pt1a) (abs threadlength)) (caddr pt1a)) pt3b)9 @' c" ^0 w+ a, q9 L- V
(princ "\n正在绘制三维螺纹，请等待")
, X6 M& W& x5 y( w6 B (command "pline" pttmp1 pttmp5 pttmp6 "c")
( b4 y( X% D) v8 k (command "revolve" "l" "" pttmp5 pttmp6 "")
: i0 z+ M; h6 w' C/ H4 L: v/ q (command "slice" "l" "" pttmp1 pttmp3 pt1z pttmp5)
+ j. o# g y8 e0 M" `3 f (command "slice" "l" "" pt1a pt3a pt1az pttmp3)# W8 I4 n4 x$ M8 p1 f' ?: ~' f
(setq tstmp (ssadd (entlast)))
m, ?; R* [* M (command "pline" pttmp3 pttmp9 pttmp10 "c")0 q1 [& \& Z2 ]) P q5 V/ |' x3 H2 c
(command "revolve" "l" "" pttmp9 pttmp10 "")
9 P" h, r2 s- `! I% c# @ (command "slice" "l" "" pttmp1 pttmp3 pt1z pttmp9)! c5 o( z1 R1 ?% d) L
(command "slice" "l" "" pt1b pt3b pt1bz pttmp3)
# T) X9 r7 \3 F U (setq tstmp (ssadd (entlast) tstmp))
3 h( j) M5 ^" s) p (command "union" tstmp "")
4 j7 M' A" W% a2 t/ O) `9 h% i ;-------------------------------------------------------------------: h0 Z1 w' q 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
& u1 S0 U$ Q U9 c, `' j, P ; 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
9 p9 V/ |% s( w. @: |, L ; 在最后一步被切除 \8 h8 K# |6 _9 S
;-------------------------------------------------------------------
$ b0 Y4 c# M: Y( h. G% s (command "slice" tstmp "" "xy" ptStart "b")4 x: t: F9 k: H. m F4 S
(setq tstmp (ssadd (entlast) tstmp))) a: p. d( `# L9 V* d8 T
(command "mirror" "l" "[email=]" pttmp1 "@10<0[/email]" "y")
: C* b) H* [$ a5 j- F' a (command "union" tstmp "")* u r6 T! \3 t
;-------------------------------------------------------------------* M% b! \8 J* ?: e
; 螺旋进行阵列操作，然后再作并集（可能会耗费一定时间）
. v/ o+ R% g I8 [. t9 _ ; 得到的实体再切除到指定的螺旋高度
) B4 q" j% a* r3 K ;-------------------------------------------------------------------& V1 K n4 ~& L! U/ z" E5 U1 _
(setq e (entlast)); z( ^( ~& r8 R& v7 E
(command "array" tstmp "" "r" ttal 1 threadpitch)2 V1 |! G" h6 |/ a$ ?
(repeat (1- ttal)
) v1 A7 o% l( ?0 P (setq e (entnext e)
$ f4 g+ h$ b+ y9 K( P7 A tstmp (ssadd e tstmp)) O6 M& v$ h: h {
)3 a" W$ A7 q, v2 A' b
)& H% N) a- K3 c
(command "union" tstmp "")
/ P/ t. O J# ~; 若开始创建45度的圆锥6 \/ {" k( s% S# i0 v3 h* k
(if (/= startcone "order")
/ s p1 v9 C, M; z/ l" i) N3 s (progn (setq e (entlast))$ k+ C X3 P) |' P
(command "cone" (list (car ptStart) (+ (cadr ptStart) threadpitch) (caddr ptStart)) "d" radmid "a" (list (car ptStart) (+ (+ (cadr ptStart) (/ radmid 2)) threadpitch) (caddr ptStart)))
) y) C( M. L7 f0 C7 V8 C& H (command "union" "l" e "")! {$ x0 X5 j; R! A
)$ W" ^) Y0 \5 Z# b
)) y( E+ L% r, t5 X& Q# y
(command "slice" "l" "" "zx" pttmp11 pttmp12)
; m( g8 e; r4 F4 T! c (command "slice" "l" "" "zx" pttmp12 pttmp11)3 X1 s0 Z) o3 k+ ?. \- ~& _' |
(command "move" "l" "" ptStart (list (car ptStart) (- (cadr ptStart) threadpitch) (caddr ptStart)))
2 d" X* a+ _1 ~( v6 f; 创建最小直径的圆柱体，然后与螺旋作交集
! |9 b2 \6 U9 \. `: B (setq e (entlast))
z- i' q; R+ h [4 D' b( m (command "cylinder" ptStart "d" radinner "c" (list (car ptStart) (+ (cadr ptStart) (abs threadlength)) (caddr ptStart)))! Q8 z/ z; d9 ^- y# _
(command "union" "l" e "")
! e8 s1 ~+ u, }- M. _ (setq tstmp (entlast))
^9 o2 o% s. ~! D5 h, U; 创建中空的圆柱体
2 I& [) D6 j, ` (command "cylinder" ptStart "d" radmid "c" (list (car ptStart) (+ (cadr ptStart) (abs threadlength)) (caddr ptStart))) ; minor dia7 s4 G1 y+ i( Z% ^7 A: w: Y
(setq e (entlast))
4 c1 u1 X4 h+ H: l5 u; 若最后创建45度的圆锥
- `8 E: J: d9 g& P; A$ d u (if (/= endcone "order")* }% \, C2 O" e* E9 U* `
(progn (command "move" "l" "" ptStart (list (car ptStart) (- (cadr ptStart) (/ (- radmid radinner) 2)) (caddr ptStart))) 4 X5 _ Y0 X) J0 V
(command "cone" ptStart "d" radmid "a" (list (car ptStart) (+ (cadr ptStart) (/ radmid 2)) (caddr ptStart))) ) ^. w7 E& r: |- G1 }
(command "move" "l" "" ptStart (list (car ptStart) (- (+ (cadr ptStart) (abs threadlength)) (/ (- radmid radinner) 2)) (caddr ptStart)))% M& I- E1 G4 @7 c- ^* n$ B9 a
(command "union" "l" e "")
5 `2 N% Z& m/ ?+ M) S, K (setq e (entlast))
- x; h/ S$ T+ }2 \( ~ )) F3 u* O/ e0 D6 P; N
)
) O9 l) Y/ ]6 i" k1 U; 从大圆柱中减去小直径圆柱; l3 A7 K& g$ j$ p& N9 s2 I
(command "cylinder" ptStart "d" (* radmid 1.5) "c" (list (car ptStart) (+ (cadr ptStart) (abs threadlength)) (caddr ptStart)))+ I( u) U* y2 p+ f* [" b) d
(command "subtract" "l" "" e "")$ ~& U; X- A" U& W# @
(setq e (entlast))
( _9 g+ h8 q% h- I) ^1 k2 E& R; 从螺旋中减去圆柱
& x6 C& h9 g5 t+ n: Z( H (command "subtract" tstmp "" e "")
5 _5 T( z% f4 a+ ^5 Q8 x; 如果螺旋长度为负然后镜像
/ p$ L) a" ]6 _6 j5 i7 I1 z (setq e (entlast))
. Z5 F: L; W" i' N7 V% U; G (if (< threadlength 0) (mirror3d e "zx" ptStart "y"))6 R+ G# C' |7 o! g
(command "zoom" "p")* m+ k2 N0 U2 i* Q7 g
; (command "undo" "end") ; 结束undo步骤9 V$ W$ r- R; l
). V2 D' ~# E2 }6 _! u c
;;;---------------------------------------------------------------------------------------------------------------------;
& n+ P: d% e4 N" @9 b(arxload "geom3d" nil)
! X |! g2 _$ H) I8 g7 m+ S0 p(princ "\n3DThread 已加载。 "); S! P" G; p) H' R7 u
(princ) |
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发表于 2007-2-27 20:30:11
