DEVELOPMENT OF CAM SYSTEM BASED ON MACHINING FEATURE

人们普遍认为，需要更高层次的描述来描述工程部件和加工操作，并且特征的主要作用之一是设计和工艺规划（或加工操作）之间的接口。特征是从应用的观点来看的抽象概念。例如，设计特征是从设计视图中抽象的形状，另一方面，加工特征是从加工操作视图中抽象的形状。特别是加工特征是连接产品模型及其加工操作的非常重要的概念。本报告对加工特征的处理如下：1）引入了形函数作为加工特征分类的准则。2）从形状特征、加工操作特征、加工工艺特征等方面对加工特征进行了分类，提出了刀具方面和表面方面的概念。优先关系表示一个加工特征将在加工操作序列中先于另一个加工特征开发的CAM系统。

It is generally agreed that higher level descriptions to refer to familiar features are needed to describe engineering components and machining operations, and one of the primary roles of features is the interface between design and process planning (or machining operation). The features are an abstraction idea from application viewpoints.For example, the Design feature is the shape abstraction from the designview, on the other hand, the Machining feature is one from the machining operation view.Especially the Machining feature is a very important idea for connecting the productmodel and it's mashining operations.This report deals with the machining features as follows :1) We introduce from shaping function as criterion for classification of machining feature in this research. This means that the machining feature should be a sufficient information model to the unit operation of process planning and operation planning.2) The classification of the Machining features from view point of shape aspect, machining operational spect, tool aspect and surface aspect is porposed.3) Precedence relationship which represents that one machining feature will precede another machining feature in the sequence of machining operations is considered in the developed CAM system.