DEVELOPMENT OF CAM SYSTEM BASED ON MACHINING FEATURE

人们普遍认为，在描述工程部件和加工操作时，需要对熟悉的特征进行更高层次的描述，特征的主要作用之一是设计与工艺规划（或加工操作）之间的接口。从应用程序的角度来看，特性是一个抽象概念。例如，设计特征是来自设计视图的形状抽象，而加工特征是来自加工操作视图的形状抽象。特别是加工特征是连接产品模型及其混置操作的一个非常重要的思想。本报告涉及的加工特征如下：1)本研究引入了从成形函数作为加工特征分类的标准。这就意味着加工特征应该是对单元作业进行工艺规划和作业计划的充分信息模型。2)从形状方面、加工操作方面、刀具方面和表面方面对加工特征进行分类。开发的凸轮系统考虑了优先关系，即在加工工序的顺序中，一个加工特征优先于另一个加工特征。

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.