Stream-of-variation (SOVA) modelling - Part II: A generic 3D variation model for rigid body assembly in multistation assembly processes
Stream-of-variation (SOVA) modelling - Part II: A generic 3D variation model for rigid body assembly in multistation assembly processes
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DOI：
10.1115/1.2738953
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发表时间：
2007-08-01
影响因子：
4
通讯作者：
Ceglarek, Dariusz
中科院分区：
文献类型：
--
作者：
Huang, Wenzhen;Lin, Jijun;Ceglarek, Dariusz
提出了一种用于多工位工艺过程偏差流分析的三维刚性装配建模技术。装配过程被建模为一个空间索引的状态转换动态系统。该模型考虑了产品和工艺因素，如：零件到夹具，零件到零件，和站间的相互作用，这代表了来自工具误差和零件误差的影响。虚拟夹具概念的结合（Huang等人，Proc. of 2006 ASME MSEC）和站间相互作用，导致通用的，统一的SOVA模型制定。为了克服基于第一性原理建模的困难，本文还提出了一种模型自动生成技术。它增强了对复杂装配体建模的适用性。开发的SOVA方法优于目前的仿真技术的计算效率，不仅在复杂的装配系统的前向分析（公差分析，灵敏度分析），但它也是更强大的后向分析（公差合成和尺寸故障诊断）。使用工业案例研究和使用标准化工业软件（3DCS Analyst）进行的一系列模拟来验证该模型。
A 3D rigid assembly modeling technique is developed for stream of variation analysis (SOVA) in multi-station processes. An assembly process is modeled as a spatial indexed state transition dynamic system. The model takes into account product and process factors such as: part-to-fixture, part-to-part, and inter-station interactions, which represent the influences coming from both tooling errors and part errors. The incorporation of the virtual fixture concept (Huang et al., Proc. of 2006 ASME MSEC) and inter-station interaction leads to the generic, unified SOVA model formulation. An automatic model generation technique is also developed for surmounting difficulties in modeling based on first principles. It enhances the applicability in modeling complex assemblies. The developed SOVA methodology outperforms the current simulation based techniques in computation efficiency, not only in forward analysis of complex assembly systems (tolerance analysis, sensitivity analysis), but it is also more powerful in backward analysis (toleronce synthesis and dimensional fault diagnosis). The model is validated using industrial case studies and series of simulations conducted using standardized industrial software (3DCS Analyst).