元动作装配单元误差源及误差传递模型研究

发布时间：2018-06-20 15:14

本文选题：装配精度控制 + 元动作装配单元　；参考：《机械工程学报》2015年17期

【摘要】：机械产品装配误差源和误差传递规律分析,是装配精度预测与控制的前提工作。在对数控机床进行结构化分解至元动作的基础上,提出了元动作装配单元的概念。针对元动作装配单元层面影响装配质量的因素,将装配过程的误差源分为位置误差、形状误差、装配位置误差等五类误差源;建立各类误差源及其误差评价的统计模型;分析误差在零件间、零件内两特征间的传递和相互作用,构建误差传递链图、误差传递网络对五种误差源与配合误差进行形象化表达。综合误差传递链接图,建立面向整个产品误差传递及装配功能表达的装配误差网络图模型,为方便误差传递网络图中各类误差传递模型的计算与存储,又进一步构建了面向整个产品装配误差传递的链接矩阵。以某加工中心连续分度转台蜗杆转动元动作装配单元装配为例,验证误差源表达和误差传递模型的有效性。
[Abstract]:The analysis of assembly error source and error transfer law of mechanical products is the premise of assembly precision prediction and control. Based on the structural decomposition to meta-action of NC machine tools, the concept of meta-action assembly unit is proposed. In view of the factors affecting assembly quality at the level of meta-action assembly unit, the error sources of assembly process are divided into five kinds of error sources, such as position error, shape error and assembly position error, and the statistical model of all kinds of error sources and their error evaluation are established. By analyzing the transfer and interaction of errors between parts and between the two features of parts, the error transfer chain diagram is constructed, and the five kinds of error sources and matching errors are visualized by error transfer network. In order to facilitate the calculation and storage of all kinds of error transfer models in error transfer network diagram, an assembly error network model oriented to the expression of the whole product error transfer and assembly function is established by synthesizing the error transfer link diagram. Furthermore, the link matrix for the whole product assembly error transfer is constructed. Taking the assembly unit of worm rotation element for a machining center as an example, the validity of error source representation and error transfer model is verified.
【作者单位】：邵阳学院机械与能源工程系;重庆大学机械工程学院;
【基金】：国家自然科学基金(51175527) 国家科技重大专项(2011ZX04003-031,2012ZX04011-031,2013ZX04012-061)资助项目
【分类号】：TG95

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