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《中国工程科学》 >> 2013年 第15卷 第1期

数控机床精度评价新方法

1. 西安交通大学机械工程学院,西安 710049;

2. 西安交通大学机械制造系统工程国家重点实验室, 西安 710049

资助项目 :国家重点基础研究发展计划资助项目(2009CB724407);国家科学重大专项(2010ZX04014-015);国家自然科学基金重点资助项目(51235009) 收稿日期: 2012-10-10 发布日期: 2013-01-14 15:42:09.000

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摘要

传统的定位精度与重复定位精度等指标是在准静态下评价数控机床(CNC)性能的,无法反映数控机床在运动和加工过程中的精度。首先从数控机床的数控、伺服、机械等环节在服役态下所表现出来的性能出发,提出一种对数控机床更有针对性的,以运动精度为指标的机床精度评价新方法,通过数控指令与运动轴实际位移的符合程度即运动精度来评价机床精度,然后给出了具体的评价指标,并提出了评价指标的测量方法。分析表明,这种新的机床运动精度描述评价方法能够系统、全面地评价数控机床关键性能的优劣。最后从数控、伺服和机械角度分别阐述了影响运动精度的因素。

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参考文献

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