带角圆柱铣刀对自由曲面3轴NC加工的刀具干涉检测

对自由曲面用带角圆柱铣刀3轴NC加工提出了系统的刀具干涉检测方法。加工自由曲面时,刀具干涉可以出现在包括刀具驱动面的刀具周围的任何地方。本文提出先检测自由曲面上可能产生刀具干涉的区域,然后再生成刀具路径,这样不但可极大地简化安排刀具路径的过程,改善加工的精度和可靠性,而且有利于产品的几何设计和影响加工效率的刀具选择。研究表明所提方法和算法是合理有效的。

Interference Detection in Three-Axis NC Machining of Freeform Surfaces Using a Fillet-End Cutter

This paper presents a systematic interference detection methodology for machining free-form surfaces on three-axis NC machines using fillet-end cutters. When a freeform surface is being milled, interference may exist anywhere around the cutter circumference, in addition to the tool-driving plane. In this method, the interference is first detected to identify the potential interference areas on the sculptured surface during machining and then tool paths are generated. Thus, the tool-path planning is greatly simplified and the accuracy and reliability of machining are improved. Geometric design processes of product and cutter size selection that are crucial to machining efficiency are also facilitated. Our case study has demonstrated the validity of the proposed methodology and algorithms.