大型椭圆形封头放样图参数化绘图的Lisp实现  

Lisp programming of parametric drawing of large standard elliptical heads' mould lof ting

作　　者：胡志刚[1] 胡炜[2] 

机构地区：[1]河南科技学院,河南新乡453003 [2]贵州电子信息职业技术学院,贵州凯里556000

出　　处：《河南科技学院学报（自然科学版）》2013年第5期53-57,共5页Journal of Henan Institute of Science and Technology(Natural Science Edition)

摘　　要：研究了大尺寸标准椭圆形EHA封头分瓣放样图参数化绘图的尺寸计算、绘图原理和方法.根据公称直径、顶圆直径、分瓣数等初始尺寸参数,给出绘制分瓣放样图所需要的展开半径等关键计算公式,自动计算展开图圆弧半径、各个圆弧的起讫点、圆弧法向距离等其他尺寸和参数;完成了基于AutoLisp及DCL语言的封头放样图的对话框参数输入界面的设计、封头展开图参数化绘图二次开发的程序设计方法,并进行实例验证.Dimension calculation,drawing principle and method of parametric drawing of large sized standard elliptical EDA heads＇ mould lofting are delivered.Arc radii formula needed for sectional heads＇ development drawing are derived of nominal and top circle diameters,petal number and other initial parameters.In drawing the arc radii of head development,arc start points ＆ end points,arc normal distances and other parameters are calculated automatically.On the basis of Autolisp and DCL a dialogue box of basic parameters ＆ dimensions input is designed, programming method of head development drawing is given along with two key programme lists attached,and a verification for this command application running is made.

关 键 词：椭圆形封头 放样图 分瓣 LISP程序 

分 类 号：TP391.7[自动化与计算机技术—计算机应用技术]