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- (defun shuru () ;输入参数
- (setq zhijing (getREAL "公称直径:"))
- (setq luoju (getreal "螺距:"))
- (SETQ QUANSHU (GETREAL "螺纹有效圈数:"))
- (SETQ JINGDU (GETint "每转切割次数:"))
- (setq QIDIAN (getpoint "输入起始点:"))
- )
- (defun JISUAN () ;计算螺纹参数
- (setq H (* 0.8660254 luoju))
- (setq D2 (- zhijing (* 2 0.375 H)))
- (SETQ LD2 (* D2 PI))
- (SETQ LUOXUANJIAO (ATAN (/ LUOJU LD2)))
- (SETQ LXJ (* 180 (/ LUOXUANJIAO pi)))
- (setq banjiao(atan(/ luoju zhijing)))
- (setq djxc (sqrt(+ (expt luoju 2) (expt zhijing 2))))
- (setq pyj (+ banjiao luoxuanjiao))
- (setq pianyi (* (sin pyj) djxc))
- (setq pianyi (/ pianyi 2.0000))
- (SETQ SL (fix (* (+ 1 QUANSHU) JINGDU ))) ;数量
- (SETQ FD (/ 360.0000 JINGDU)) ;分度
- (SETQ BC (/ (* 1.0000 LUOJU) JINGDU))
- (setq bc (- bc)) ;步长
- )
- (defun draw () ;绘制
- (setq pt1 (polar QIDIAN PI (/ LUOJU 2.0000)))
- (SETQ PT1 (POLAR PT1 (* 1.5 PI) (+ (* 0.1250 H) (/ ZHIJING 2.0000))))
- (SETQ PT2 (POLAR PT2 (* 0.5 PI) (* 1 H)))
- (setq pt3 (polar pt2 0 (* 0.5 LUOJU )))
- (setq pt4 (polar pt1 0 (* 0.5 LUOJU ))) ;基本三角形
- (setq pt5 (polar QIDIAN pi (* 2.00 LUOJU QUANSHU)))
- (setq pt7 (polar pt5 0 (* 2 LUOJU)))
- (setq pt7 (polar pt7 (* 1.5 pi) (/ ZHIJING 2))) ;螺纹轴线
- (setq pt6 (polar pt5 0 LUOJU))
- (SETQ PT6 (POLAR PT6 (* 0.5 PI) (* 0.50000 ZHIJING))) 光杆轮廓
- (SETQ PT8 (POLAR PT1 0 (* 0.5 LUOJU)))
- (SETQ PT9 (POLAR PT8 (* 0.5 PI) (* 0.8 ZHIJING))) ;齿条转动轴线
- (SETQ MV (POLAR QIDIAN 0 (/ ZHIJING 2.0000)))
- ;制做齿条并转角
- (command "pline" pt1 pt2 pt3 pt4 "c" )
- (command "extrude" "last" "" ZHIJING "" )
- (setq SS (ssget pt1))
- (rotate3d ss PT9 PT8 90)
- (COMMAND "MOVE" "Previous" "" QIDIAN MV )
- (rotate3d ss "" PT8 PT9 90)
- (rotate3d ss "" PT9 PT8 LXJ)
- (SETQ YD (POLAR QIDIAN 0 (/ LUOJU 2.0000)))
- (COMMAND "MOVE" "Previous" "" QIDIAN YD ) ;外移
- ;制做光杆
- (SETQ PT0 (POLAR QIDIAN 0 LUOJU))
- (COMMAND "LINE" PT5 PT0 "")
- (COMMAND "rectang" PT6 QIDIAN)
- ? (COMMAND "revolve" "LAST" "" PT5 qidian "")
- (command "zoom" "e")
- ;布尔运算
- (SETQ PT (POLAR PT4 0 pianyi))
- (SETQ SQ pt6)
- (while (/= SL 0) ;判断
- (SETQ SS (SSGEt pt))
- (setq pta (polar pt 0 bc))
- (command "copy" ss "" pt pta)
- ; (prin1 pt)
- (COMMAND "subtract" sq "" ss "") ;相减
- ; (setq zanting(getstring))
- (setq SS (ssget pt6))
- (ROTATE3D SS PT5 qidian FD ) ;旋转
- (setq PT pta) ;步进
- (SETQ SL (- SL 1))
- )
- (setq pta (polar pt 0 bc))
- (COMMAND "ERASE" PT "")
- )
- (defun C:3DLW ()
- (arxload "geom3d.ARX" NIL)
- (shuru)
- (SETQ SSs (GETVAR "OSMODE"))
- (SETVAR "OSMODE" 0)
- (SETQ SNM (GETVAR "SNAPMODE"))
- (SETVAR "SNAPMODE" 0)
- (SETQ PICKB (GETVAR "PICKBOX"))
- (SETVAR "PICKBOX" 0)
- (setq cmd (getvar "cmdecho"))
- (setvar "cmdecho" 0)
- (JISUAN)
- (SETQ GD (* 60 ZHIJING))
- (SETQ CT (POLAR QIDIAN PI (* LUOJU QUANSHU)))
- (COMMAND "ZOOM" "C" CT GD)
- (draw)
- (SETVAR "OSMODE" SSs)
- (setvar "cmdecho" cmd)
- (SETVAR "SNAPMODE" SNM)
- (SETVAR "PICKBOX" PICKB)
- )
- (princ "\n\tC: 3DLW 为绘制命令")
- (princ)
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