Accuracy analysis for machine tool spindles considering full parallel connections and form errors based on skin model shapes

IF 4.8 2区 工程技术 Q1 COMPUTER SCIENCE, INTERDISCIPLINARY APPLICATIONS
Xiaokun Hu, Qiangqiang Zhao, Yitao Yang, Shaoke Wan, Yanhui Sun, Jun Hong
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引用次数: 0

Abstract

Abstract The rotation accuracy of a machine tool spindle is essential for ensuring the machining precision. Due to the existence of manufacturing and assembly errors, the rotation accuracy of the spindle will be inevitably impacted and degraded. Therefore, to reduce the influence of the errors and improve the work performance, this paper focuses on accuracy analysis for the spindle and a novel optimization-oriented skin model shape method to tackle this highly complex problem. First, a structural analysis of the spindle is carried out to elaborate the intractable full parallel collections in the assembly. Then, based on the iterative closest point method, the deviation propagation of the spindle considering complex full parallel collections is transformed into an optimization problem, in which the skin model shapes and small displacement torsor are utilized to represent the form and pose errors of the part, respectively. By solving the optimization problem, assembly accuracy analysis for the spindle in terms of full parallel connections and form errors is accordingly achieved. On this basis, the tolerance analysis model of the spindle is also comprehensively established by employing the corresponding error simulation. Finally, measurement experiments are conducted to validate the effectiveness of the proposed method. The experiments show the predicted rotation runout and tolerance magnitude are close to the testing results, therefore indicating the proposed method can provide effective accuracy analysis for spindles.
考虑全并联和基于蒙皮模型形状的形状误差的机床主轴精度分析
机床主轴的旋转精度是保证机床加工精度的关键。由于制造和装配误差的存在,主轴的旋转精度不可避免地会受到影响和降低。因此,为了减少误差的影响,提高工作性能,本文重点对主轴进行精度分析,并提出了一种新的面向优化的蒙皮模型形状方法来解决这一高度复杂的问题。首先,对主轴进行了结构分析,阐述了装配中难以处理的全平行集合。然后,基于迭代最近点法,将考虑复杂全平行集合的主轴偏差传播问题转化为以蒙皮模型形状和小位移量分别表示零件形状和位姿误差的优化问题。通过求解优化问题,对主轴进行了全平行连接和形状误差的装配精度分析。在此基础上,采用相应的误差仿真,全面建立了主轴公差分析模型。最后,通过测量实验验证了所提方法的有效性。实验结果表明,预测的转速跳动和公差值与试验结果接近,表明该方法可以有效地对主轴进行精度分析。
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来源期刊
Journal of Computational Design and Engineering
Journal of Computational Design and Engineering Computer Science-Human-Computer Interaction
CiteScore
7.70
自引率
20.40%
发文量
125
期刊介绍: Journal of Computational Design and Engineering is an international journal that aims to provide academia and industry with a venue for rapid publication of research papers reporting innovative computational methods and applications to achieve a major breakthrough, practical improvements, and bold new research directions within a wide range of design and engineering: • Theory and its progress in computational advancement for design and engineering • Development of computational framework to support large scale design and engineering • Interaction issues among human, designed artifacts, and systems • Knowledge-intensive technologies for intelligent and sustainable systems • Emerging technology and convergence of technology fields presented with convincing design examples • Educational issues for academia, practitioners, and future generation • Proposal on new research directions as well as survey and retrospectives on mature field.
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