NC编程系统中切削模型的统一表示

Unified Representation of Machining Model in NC Programming System

在新的 CAD/CA M建模思想和标准化不断完善的促进下 ,NC编程系统正在向智能化和参数化发展 .加工轨迹计算和产品设计过程实现动态关联 ,刀位计算实时响应设计模型的编辑修改 .制造过程规划中的切削域统一表示建立在零件设计模型识别和向制造模型自动转化基础之上 .参考显式的设计语义和过程信息 ,以“腔槽及其边界”形式构造通用的 NC计算模型 .该通用 NC计算模型超越常规的特征模型概念 ,支持主动式的工艺过程规划 ,有利于自动生成更大程度上满足设计要求的高质量数控代码 .

Under the guidance of new trend of CAD/CAM system development and standardization, NC programming system is introducing the concepts of parameterization and intelligence, where machining trajectories generation is dynamically associated with the product design process, and thus, can respond in real time to the latter's modification. The unified representation of the machining region in process planning is build up on the history based design model recognition and its automatic conversion to manufacturing model. By capturing the original explicit design semantics and design process, the general NC computation model could be set up and expressed as ‘a pocket and its boundary’. This model is beyond the reach of traditional feature model and supports initiative process planning, which favors the generation of high quality NC program to meet the design requirements in a greater degree.