摘要
结合开发国产化软件的实践，详细论述了ＣＡＤ／ＣＡＭ技术中有关裁剪曲面的描述及加工自动编程算法的研究。从曲面造型及加工编程的通用性角度出发，将曲面的三维几何信息映射到二维参数域上，用二维拓扑信息环来描述裁剪曲面，把各种裁剪曲面的加工编程统一为一种具有拓扑信息环的广义曲面加工编程。同时，采用环形刀计算刀位信息，可方便地推广至球头刀或平底刀的加工编程。根据预先设定的残留高度及插补误差，在编程中对刀切点和刀位点的计算进行有效控制，保证了加工编程的精度要求。
To meet the needs for the development of CAD/CAM software, this paper discusses the description of trimmed surfaces and the NC auto programming algorithm in detail. From a general purpose point of view of surface modelling and NC auto programming, the machining program designs of various trimmed surfaces are unified into those of a generalized surface with topological information loop. Topological information loop is produced by transforming 3 D geometric information into 2 D parametric field. In order to guarantee the machining tolerance , the scallop height and interpolating tolerance must be set in advance to calculate CC data and CL data.
出处
《南京航空航天大学学报》
CAS
CSCD
1996年第3期390-395,共6页
Journal of Nanjing University of Aeronautics & Astronautics
基金
国家教委博士点基金资助项目
关键词
参数线
加工算法
CAD
CAM
数控切削
裁剪曲面
computer aided design
computer aided manufacturing
NC machining
auto programming
