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基于轨迹的旋转轴位置独立的几何错误的识别,考虑到激发投影效应
Songtao He1, Seth Osei1, Wei Wang1
1School of Mechanical and Electrical Engineering, University of Electronic Science and Technology of China, Chengdu 611731, China.
本研究引入了一种新方法,用于识别五轴机床中的几何错误. 这项研究强调了激发投影,而不仅仅是测试路径,如何影响旋转轴位置独立几何误差 (PIGEs) 的准确性.
科学领域:
- 制造业 工程 制造工程
- 机械工程 机械工程
- 计量学 计量学 计量学
背景情况:
- 五轴机床中的旋转轴增加了灵活性,但引入了显著的几何错误,特别是位置独立的几何错误 (PIGEs).
- 在先进的制造工艺中,PIGEs是导致精度下降的主要原因.
- 有限的研究已经探索了测试轨迹特征,特别是激发投影对PIGE识别准确性的影响.
研究的目的:
- 提出并验证一种基于轨迹的方法,用于在使用单一设置的五轴机床中识别旋转轴PIGE.
- 系统地调查激发投影对PIGE识别准确性的影响.
- 为了比较不同机床动力学配置 (AC型与BC型) 的识别性能.
主要方法:
- 对旋转轴的全面错误模型的开发.
- 实施双差分辨识方案来分析错误组件.
- 通过模拟研究和对AC型和BC型机床的实验测试进行验证.
主要成果:
- 在有利的激发投影下,在第二个差异后,在AC型机床上实现了所有旋转轴PIGE的准确识别.
- 最佳的激发投影取决于机床的动力学配置,如BC型机床模拟中所示.
- 使用已识别的PIGE进行补偿,大大减少了轨迹误差,证实了该方法的有效性.
结论:
- 旋转轴PIGE的识别准确性严重依赖于激发投射和机床结构配置之间的相互作用.
- 拟议的单一设置方法提供了一种实用和有效的方法,用于提高五轴机床中PIGE的识别精度.
- 未来的研究应该在设计测试轨迹时考虑特定的动力结构,以实现最佳的PIGE识别.
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