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首页> 外文期刊>International Journal of Machine Tools & Manufacture: Design, research and application >G codes for the specification of pythagorean-hodograph tool paths and associated feedrate functions on open-architecture CNC machines
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G codes for the specification of pythagorean-hodograph tool paths and associated feedrate functions on open-architecture CNC machines

机译：G代码，用于在开放式结构CNC机床上指定勾索-全息图刀具路径以及相关的进给率功能

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摘要

A new class of machine codes for the specification of Pythagorean-hodograph (PH) curve tool paths, and associated feedrate functions, is proposed. The PH curves are a special family of free-form curves, compatible with the Bezier/B-splinerepresentations of CAD systems, that are amenable to real-time interpolation at constant or variable feedrate directly from their exact analytic descriptions. The proposed codes are compatible with 'ordinary' (linear/circular) G codes, and may be regarded as extensions thereof. Compared to the customary approach of using piecewise-linear/circular approximations, they offer significant improvements in the accuracy, efficiency, data volume, and flexibility of part programs for free-form shapes. Experimentalresults from an implementation of these real-time PH curve interpolators on an 'open-architecture' CNC milling machine are also described.
机译：提出了一类用于勾股勾线描记器（PH）曲线刀具路径规范以及相关进给率功能的新型机器代码。 PH曲线是一种特殊的自由形式曲线系列，与CAD系统的Bezier / B样条曲线表示形式兼容，这些曲线可以直接根据其精确的分析描述以恒定或可变进给率进行实时插值。所提出的代码与“普通”（线性/圆形）G代码兼容，并且可以被视为其扩展。与使用分段线性/圆形近似的常规方法相比，它们在自由形式形状的零件程序的准确性，效率，数据量和灵活性方面提供了显着改进。还描述了在“开放式结构” CNC铣床上实现这些实时PH曲线插值器的实验结果。

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