【作者】 刘宏伟；

【导师】 张英芝；

【作者基本信息】 吉林大学 ， 机械工程， 2012， 硕士

【摘要】 在产品装配过程中，零部件的装配优先次序对装配质量和效率起决定性作用。随着产品的复杂性提高和生产周期的缩短，快速有效地获得产品优化的装配序列已成为提升企业竞争力的必然要求。因此，以割集理论为基础自动生成产品的装配序列具有十分重要的理论意义和工程应用价值。本文以国产某系列数控车床主轴部件为研究对象，建立产品装配模型，并采用图论的方法表达产品的装配模型；再运用图论中的割集理论与装配体零部件之间的连接和约束关系相结合的方法，自动生成全部的装配序列；最后基于可拓层次分析法对装配序列进行评价。首先，建立装配体的装配模型，它包括装配体的关系模型和层次模型。关系模型用无向连接图表达。然后在假设装配序列与拆卸序列互逆的前提下，求解连接图的全部割集，并同步判定所求得割集的可行性，将不可行的割集及时剔除，以减少运算量，提高运算效率。最终将所有可行的装配序列用与或图表达出来。为优选装配序列，本文利用可拓层次分析法对其进行评价。评价结果直接显示出各装配序列的优劣，为实际生产提供可靠依据。更多还原

【Abstract】 During the assembly of the products, the priority in the assembly of spare partsplays a decisive role in the assembly in terms of quality and efficiency. According asproduct complexity improves and the production cycle reduces, the achievement of aquick and efficient assembly sequence is inevitable requirement for the improvementof enterprise competitiveness. As a matter of fact, the automatic generation of productassembly sequence which is on the basis of cut-set theory, has important theoreticalsignificance and engineering application valueTaking numerical control lathe spindle unit as research object, the productassembly model is built and the method of graph theory is used to express the productassembly model; the method of combing the connection between the cut set in thegraph theory and the spare parts of the assembly with their constraint relationship isadopted to automatically generate the whole assembly sequence. Finally, Extensionanalytic hierarchy process is used to evaluate the assembly sequence.First, the assembly model of the assembly is established, including the relationmodel and the hierarchical model. The relation model is expressed in the undirectedliaison graph. Under the assumption that the assembly sequence and the disassemblyis inverse, the whole cut set of the liaison graph is solved, and the feasibility of the cutset is confirmed which will reduce calculation amount and increase efficiency byeliminating those unfeasible cut-set. Finally, all the feasible assembly sequence isshown in AND/OR graph. AHP method is used to evaluate the assembly. The result ofthe assessment shows directly the advantages and disadvantages of each assemblysequence so as to provide reliable basis for the actual processes of production andassembly.更多还原