• CN:11-2187/TH
  • ISSN:0577-6686

机械工程学报 ›› 2022, Vol. 58 ›› Issue (7): 193-213.doi: 10.3901/JME.2022.07.193

• 数字化设计与制造 • 上一篇    下一篇

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精度保持性定量评价与精度退化机理分析

张生永1,2,3, 冉琰1, 张根保2, 墨菲·艾德里安3, 黎新龙1   

  1. 1. 重庆大学机械传动国家重点实验室 重庆 400044;2. 重庆文理学院机电工程学院 重庆 402160;3. 贝尔法斯特女王大学机械与航天工程学院 贝尔法斯特 英国 BT71NN
  • 收稿日期:2021-04-09 修回日期:2021-08-28 出版日期:2022-04-05 发布日期:2022-05-20
  • 通讯作者: 冉琰(通信作者),女,1988年出生,副教授,博士生导师。主要研究方向为数控机床可靠性、机电产品质量。E-mail:ranyan@cqu.edu.cn
  • 作者简介:张生永,男,1995年出生,博士研究生。主要研究方向为机电产品质量工程。E-mail:Shengyong-Zhang@cqu.edu.cn
  • 基金资助:
    国家自然科学基金(51835001,51705048)和国家科技重大专项(2018ZX04032-001,2019ZX04005-001)资助项目。

Quantitative Evaluation of Accuracy Retentivity and Analysis of Accuracy Degradation Mechanism

ZHANG Shengyong1,2,3, RAN Yan1, ZHANG Genbao2, MURPHY Adrian3, LI Xinlong1   

  1. 1. State Key Lab of Mechanical Transmission, Chongqing University, Chongqing 400044;2. College of Mechaniical and Electrical Engineering, Chongqing University of Arts and Sciences, Chongqing 402160;3. School of Mechanical and Aerospace Engineering, Queen's University Belfast, Belfast, UK, BT71NN
  • Received:2021-04-09 Revised:2021-08-28 Online:2022-04-05 Published:2022-05-20

摘要: 针对精度保持性定量评价难题,提出了精度退化率评价指标结合精度寿命的精度保持性定量评价方法;在精度退化机理分析方面,首先建立了影响元动作精度及精度保持性的制造及装配误差项的标准化分析流程,然后基于松动、磨损、形变、老化等典型精度退化原因所致制造及误差项变化机理,提出了精度退化机理分析的通用化三阶段分析方法,并定义了剩余精度寿命及精度寿命周期。以元动作为研究对象对所提评价和分析方法进行说明,以残余应力致精度退化为应用实例证明了方法的可行性。该评价及分析方法为机械产品精度相关质量特性的研究提供了新的思路和参考。

关键词: 元动作, 误差项, 精度退化率, 精度保持性, 残余应力

Abstract: Aiming at the problem of quantitative evaluation of accuracy retentivity, the accuracy degradation rate (ADR) evaluation index is proposed and combined with accuracy life (AL) to quantitatively evaluate accuracy retentivity. In terms of accuracy degradation mechanism analysis, the standardized analysis process of manufacturing and assembling error items influencing the meta-action accuracy and accuracy retentivity is proposed, then based on these items’ variation mechanism caused by looseness, abrasion, deformation and aging, a generalized three-stage analysis method of degradation mechanism analysis is proposed and residual accuracy life and accuracy life cycle are defined. Meta-action is used to illustrate the evaluation and analysis method proposed and the example of accuracy degradation caused by residual stress is used to verify the feasibility. The evaluation and analysis method provides new thought and reference for the research of mechanical products’ accuracy-related quality characteristics.

Key words: meta-action, error items, accuracy degradation rate, accuracy retentivity, residual stress

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