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Frequency Domain Analysis and Precision Realization in Deterministic Figuring of Ultra-Precision Shaft Parts

An aerostatic spindle is a core component in ultra-precision machine tools. The rotor of the spindle has extremely high manufacturing accuracy, which cannot be directly achieved via traditional machining, but always via manual grinding. The deterministic figuring theory is introduced into the machin...

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Autores principales: Sun, Zizhou, Hu, Hao, Dai, Yifan, Guan, Chaoliang, Tie, Guipeng, Ou, Yang
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2020
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7602269/
https://www.ncbi.nlm.nih.gov/pubmed/33066486
http://dx.doi.org/10.3390/ma13204561
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author Sun, Zizhou
Hu, Hao
Dai, Yifan
Guan, Chaoliang
Tie, Guipeng
Ou, Yang
author_facet Sun, Zizhou
Hu, Hao
Dai, Yifan
Guan, Chaoliang
Tie, Guipeng
Ou, Yang
author_sort Sun, Zizhou
collection PubMed
description An aerostatic spindle is a core component in ultra-precision machine tools. The rotor of the spindle has extremely high manufacturing accuracy, which cannot be directly achieved via traditional machining, but always via manual grinding. The deterministic figuring theory is introduced into the machining of shaft parts, which overcomes many shortcomings of manual grinding. The manufacturing error of the shaft’s surface contains different frequency components, which have different effects on its working performance and the figuring process. Because the deterministic figuring method can only correct the error within a limited frequency range, in order to ensure high efficiency and high precision of the figuring process, we need to use reasonable filtering parameters to filter out the error with unnecessary frequencies. In this paper, the influence of contour error with different frequencies and amplitudes on the air film are analyzed using computational fluid dynamics (CFD) software, and the amplitude–frequency analysis as a function of the power spectral density (PSD) characteristic curve is used to study the filtering parameters of the measured data. After the figuring experiment using the filtering parameters obtained from the analysis, the average roundness of the shaft converged from 0.419 μm to 0.101 μm, and the cylindricity converged from 0.76 μm to 0.35 μm. The precision reached the level of manual grinding, which proves the rationality of the analysis using filtering parameters in a shaft’s deterministic figuring.
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spelling pubmed-76022692020-11-01 Frequency Domain Analysis and Precision Realization in Deterministic Figuring of Ultra-Precision Shaft Parts Sun, Zizhou Hu, Hao Dai, Yifan Guan, Chaoliang Tie, Guipeng Ou, Yang Materials (Basel) Article An aerostatic spindle is a core component in ultra-precision machine tools. The rotor of the spindle has extremely high manufacturing accuracy, which cannot be directly achieved via traditional machining, but always via manual grinding. The deterministic figuring theory is introduced into the machining of shaft parts, which overcomes many shortcomings of manual grinding. The manufacturing error of the shaft’s surface contains different frequency components, which have different effects on its working performance and the figuring process. Because the deterministic figuring method can only correct the error within a limited frequency range, in order to ensure high efficiency and high precision of the figuring process, we need to use reasonable filtering parameters to filter out the error with unnecessary frequencies. In this paper, the influence of contour error with different frequencies and amplitudes on the air film are analyzed using computational fluid dynamics (CFD) software, and the amplitude–frequency analysis as a function of the power spectral density (PSD) characteristic curve is used to study the filtering parameters of the measured data. After the figuring experiment using the filtering parameters obtained from the analysis, the average roundness of the shaft converged from 0.419 μm to 0.101 μm, and the cylindricity converged from 0.76 μm to 0.35 μm. The precision reached the level of manual grinding, which proves the rationality of the analysis using filtering parameters in a shaft’s deterministic figuring. MDPI 2020-10-14 /pmc/articles/PMC7602269/ /pubmed/33066486 http://dx.doi.org/10.3390/ma13204561 Text en © 2020 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Sun, Zizhou
Hu, Hao
Dai, Yifan
Guan, Chaoliang
Tie, Guipeng
Ou, Yang
Frequency Domain Analysis and Precision Realization in Deterministic Figuring of Ultra-Precision Shaft Parts
title Frequency Domain Analysis and Precision Realization in Deterministic Figuring of Ultra-Precision Shaft Parts
title_full Frequency Domain Analysis and Precision Realization in Deterministic Figuring of Ultra-Precision Shaft Parts
title_fullStr Frequency Domain Analysis and Precision Realization in Deterministic Figuring of Ultra-Precision Shaft Parts
title_full_unstemmed Frequency Domain Analysis and Precision Realization in Deterministic Figuring of Ultra-Precision Shaft Parts
title_short Frequency Domain Analysis and Precision Realization in Deterministic Figuring of Ultra-Precision Shaft Parts
title_sort frequency domain analysis and precision realization in deterministic figuring of ultra-precision shaft parts
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7602269/
https://www.ncbi.nlm.nih.gov/pubmed/33066486
http://dx.doi.org/10.3390/ma13204561
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