面向板腔类零件机加工艺的加工特征识别方法

Machining feature recognition method for machining process facing plate parts

为了实现板腔类零件加工特征智能识别,加快三维机加工艺的设计速度,研究了面向板腔类零件机加工艺的加工特征识别方法。综合考虑加工特征的通透性和开放性,将加工特征分为完全开放加工特征、半开放加工特征、封闭盲加工特征、半开放通加工特征和封闭通加工特征5种类型;介绍了加工特征识别过程的原则,提出了基于主加工面自底向上的特征识别策略;详细阐述了加工特征的识别过程,主要包括特征类型的判别、加工特征的多义性处理和加工特征体的提取等关键步骤。建立了面向腔板类零件的三维CAD/CAPP集成系统的原型系统,实现了加工特征识别模块,并通过实例零件验证了所提方法的有效性和正确性。

To realize the intelligent recognition of plate parts＇ machining features and to accelerate the design speed of 3D machining technique, the machining feature recognition method for the plate parts machining process was re searched. Through considering the permeability and openness, the machining feature was divided into five types of All Open Machining Feature （AOMF）, Semi-Open Machining Feature （SOMF）, Blind Closed Machining Feature （BCMF）, Through Closed Machining Feature （TCMF） and Through Semi-Open Machining Feature （TSOMF）. The principles of machining feature recognition process was introduced, and the recognition strategies based on the main processing surface was proposed. The recognition process was elaborated in detail, which included the key steps such as type discrimination, feature ambiguity processing and feature extraction. An integration system of CAD/CAPP for plate parts was developed, and two plate parts were used to verify the validity and correctness of the proposed method.