精度保持性定量评价与精度退化机理分析  

Quantitative Evaluation of Accuracy Retentivity and Analysis of Accuracy Degradation Mechanism

作　　者：张生永 冉琰[1] 张根保 墨菲·艾德里安 黎新龙 ZHANG Shengyong;RAN Yan;ZHANG Genbao;MURPHY Adrian;LI Xinlong(State Key Lab of Mechanical Transmission,Chongqing University,Chongqing 400044;College of Mechaniical and Electrical Engineering,Chongqing University of Arts and Sciences,Chongqing 402160;School of Mechanical and Aerospace Engineering,Queen’s University Belfast,Belfast,UK,BT71NN)

机构地区：[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

出　　处：《机械工程学报》2022年第7期193-213,共21页Journal of Mechanical Engineering

基　　金：国家自然科学基金(51835001,51705048);国家科技重大专项(2018ZX04032-001,2019ZX04005-001)资助项目。

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。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.

关 键 词：元动作 误差项 精度退化率 精度保持性 残余应力 

分 类 号：TG502[金属学及工艺—金属切削加工及机床]