元动作装配单元误差传递模型及有效路径求解方法

发布时间：2018-03-24 12:23

本文选题：元动作装配单元　切入点：误差　出处：《重庆大学学报》2017年03期

【摘要】：在对机械产品进行"功能-运动-动作"结构化分解的基础上,将影响元动作装配单元装配精度的误差源分为零部件的形状误差、位置误差、装配位置误差和运动误差等四类误差源。引入误差链接模型作为元动作装配单元误差关联关系的基本封装单元,构建结构化误差关联模型——链接网络和链接矩阵,形象描述误差间的耦合嵌套关系。提出基于误差链接模型的装配误差传递路径求解方法,用老鼠迷宫算法搜索所有可能的误差传递路径,以装配精度最高作为判别依据,得到各误差分量的有效传递路径。以蜗杆转动元动作装配单元蜗杆轴线平行度误差有效传递路径为目标,对上述方法进行验证,结果表明该方法能够高效地搜索到所有误差传递路径,并快速获得有效传递路径。该方法的提出为整机装配过程质量预测与控制提供了理论依据。
[Abstract]:On the basis of the structural decomposition of "function-movement-action" for mechanical products, the error sources that affect the assembly accuracy of the meta-action assembly unit are divided into the shape error and the position error of the parts. The error link model is introduced as the basic encapsulation unit of the error correlation relation of the meta-action assembly unit, and the structured error correlation model-link network and link matrix are constructed. This paper describes the coupling nesting relationship between errors, proposes an error link model based assembly error transfer path solution method, uses mouse maze algorithm to search all possible error transfer paths, and takes the highest assembly accuracy as the criterion. The effective transfer path of each error component is obtained. The effective transfer path of the worm axis parallelism error of the worm rotation element is taken as the target, and the above method is verified. The results show that the method can efficiently search all the error transfer paths and obtain the effective transfer paths quickly. The proposed method provides a theoretical basis for the quality prediction and control of the whole assembly process.
【作者单位】：重庆大学机械工程学院;
【基金】：国家自然科学基金资助项目(51575070,51305418) 国家“高档数控机床与基础制造装备”科技重大专项(2014ZX04001-031;2015ZX04003003-07)~~
【分类号】：TG95

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