NURBS interpolator for constant material removal rate in open NC machine tools
NURBS interpolator for constant material removal rate in open NC machine tools
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DOI：
10.1016/j.ijmachtools.2003.10.020
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发表时间：
2004-02-01
影响因子：
14
通讯作者：
Kim, HS
中科院分区：
文献类型：
--
作者：
Tikhon, M;Ko, TJ;Kim, HS
传统的直线或圆弧插补方法由于点数据量大、曲线分段不连续、运动速度不平稳等原因，在三维自由曲面的精密加工中不适用。在这方面，现代CNC机床被设计成具有加工任意参数曲线的功能。然而，这些系统没有考虑自适应控制进给速度，这主导了加工过程的质量。提出了一种基于自适应进给控制的NURBS曲面造型方法，实现了恒定的材料去除率。这是通过使用曲面的曲率改变进给速率来实现的。曲率补偿进给系统在保证零件精度和保护刀具方面具有重要的应用前景。模拟和实验结果。表明该方法适用于真实的加工。(C)2003 Elsevier Ltd.保留所有权利。
Conventionally used linear or circular interpolators are undesirable for the precision machining of 3D free-form surfaces for the following reasons: the transmission errors due to the huge number of point data, discontinuity of curve segmentation, and unsmooth motion speed. In this regard, modern CNC machine tools are designed with a function for machining arbitrary para-metric curves. However, these systems do not consider controlling feedrate adaptively, which dominates the quality of the machining process. This paper proposes a NURBS interpolator based on the adaptive feedrate control for the constant material removal rate. This is accomplished by varying feedrate using the curvature of a surface. The curvature-compensated feedrate system has important potential applications in ensuring part accuracy and protecting the cutting tool. The simulated and experimental results. show it is applicable to real machining. (C) 2003 Elsevier Ltd. All rights reserved.