面向数控机床装配精度预测的元动作误差建模技术

孙云艳; 刘英; 冉琰; 周庆法

doi:10.13433/j.cnki.1003-8728.2017.1116

面向数控机床装配精度预测的元动作误差建模技术

doi: 10.13433/j.cnki.1003-8728.2017.1116

1.
重庆大学机械传动国家重点实验室, 重庆 400044

基金项目:

国家自然科学基金项目（51575070）与国家科技重大专项项目（2014ZX04001-031，2015ZX04003003-07）资助

详细信息

作者简介:
孙云艳(1990-),硕士研究生,研究方向为机床可靠性工程,wangxincd@cqu.edu.cn

通讯作者:
刘英(联系人),教授,博士,liuyingu6682@163.com

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- 文章访问数: 187
- HTML全文浏览量: 21
- PDF下载量: 15
- 被引次数: 0
出版历程
- 收稿日期: 2016-07-08
- 刊出日期: 2017-11-05

Assembly Precision Prediction Method of Numerical Control Machine Tools based on Meta-action

1.
The State Key Laboratory of Mechanical Transmission, Chongqing University, Chongqing 400044, China

摘要

摘要: 装配是保证产品质量的重要环节，而装配精度是装配过程的重要度量指标。为预测数控机床最终装配精度，利用“功能-运动-动作（Function-Movement-Action，FMA）”的功能分解原则对机床的装配过程进行结构化分析，将机床分解至基本动作单元-元动作；构建基于元动作的装配误差传递层次架构图，清晰地表达了各装配单元间的装配关系及几何特征之间的逻辑关系；以几何特征误差在装配过程中的传递与积累为基础，构建多层次状态空间模型预测数控机床最终装配精度；以某数控加工中心的Z轴进给功能装配单元为例，验证了该方法在机床装配误差预测中的可行性。
- FMA结构化分解 /
- 元动作 /
- 装配精度 /
- 状态空间
Abstract: Assembly is a key of product quality assurance, and assembly precision is an important measurement index in assembling process. There were four steps to predict assembly precision of NC machine. Firstly, the functional decomposition approach “function-motion-action” was used to analyze its assembly process structurally, then it was decomposed down into basic action, i.e. meta-action. Secondly, in order to express the assembly relationship between the assembly units and the logical relationship between the geometry features, the frame chart of assembly errors propagation via meta-action was constructed. Thirdly, the multi-level model for state space was built to predict final assembly precision of NC machine on the basis of the propagation and accumulation of geometry errors. Finally, the effectiveness of multi-level model for state space was demonstrated by an example of Z axis feed function assembly unit from a certain machining center.
- FMA functional decomposition /
- meta-action /
- assembly errors /
- model for state space

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参考文献(15)

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