Recognition of Multi Axis Milling Features: Part I-Topological and Geometric Characteristics
Recognition of Multi Axis Milling Features: Part I-Topological and Geometric Characteristics
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DOI：
10.1115/1.1778718
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发表时间：
2004-09
期刊：
影响因子：
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通讯作者：
Nandakumar Sridharan;J. Shah
中科院分区：
文献类型：
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作者：
Nandakumar Sridharan;J. Shah
在加工特征识别方面的工作大多局限于2-1/2和3轴铣削特征。识别复杂特征的主要障碍是难以概括其形状特征。这篇由两部分组成的论文描述了识别简单和复杂特征的通用方法;后者可能具有自由曲面，可能需要4轴或5轴加工。本文的第一部分试图描述的几何和拓扑特征。第二部分的文件使用的特征和分类的第一部分设计的特征识别算法。第一部分提出了五个基本类别和几个子分类的功能都来自加工的考虑和计算方法的数控刀具路径生成。与使用诸如槽和台阶等拓扑刚性特征不同，加工特征被分类为“切穿”、“切绕”和“切上”，并进一步被分类为子类别。每个要素类都由特性列表描述。除了在特征识别方面的明显用途外，这种特征分类和特征化可能在为复杂特征制定未来数据交换标准方面有潜在用途。
Most of the work in machining feature recognition has been limited to 2-1/2 and 3 axis milling features. The major impediment to recognition of complex features has been the difficulty in generalizing the characteristics of their shape. This two-part paper describes general purpose methods for recognizing both simple and complex features; the latter may have freeform surfaces and may require 4 or 5 axis machining. Part I of this paper attempts to describe features in terms of geometric and topological characteristics. Part II of the paper uses the characterization and classification developed in Part I for designing feature recognition algorithms. Part I proposes five basic categories and several sub-classifications of features derived both from machining considerations and computational methods for NC toolpath generation. Rather than using topologically rigid features, such as slots and steps, etc., machining features are classified as “Cut-Thru,” “Cut-Around” and “Cut-on” and further classified into sub-categories. Each feature class is described by a list of properties. Apart from the obvious use in feature recognition, this feature classification and characterization may have potential use in developing future data exchange standards for complex features.