基于多源中性文件的铸造工艺数字化设计机理与方法研究

Casting process digital design is a common basic problem of the foundry industry. Along with the innovation of digital technique and labor division between enterprises, the upstream and downstream enterprises adopt multi-source neutral file to exchange part drawings, which cause that the original digital design method is no longer applicable. Thus the process design and production cycle of casting are severely restricted. In order to solve the above problem, this project will carry out the research on mechanism and method of casting process digital design base on multi-source neutral file. In the mechanism layer, the concept and principle of multi-source neutral file is proposed. The coupling mechanism and model between casting process parameter, schema and process geometry feature are constructed. In the method layer, the method of fast and accurate parser mechanism of part structure in 2D neutral file is studied. The method of local feature extraction for process design from part structure in 2D neutral file is proposed. The fast and precise drawing system of 2D casting process is established. The method of fast and accurate parser mechanism of part structure in 3D neutral file is studied. The automatic design method of casting process based on 3D neutral file is established. In application layer, the practice research of the tool will be launched and be practiced. In this project, the process design and neutral file are deeply combined, which provides the innovative method for digital casting process design. The research of this project has important scientific significance and broad application prospect.

铸造工艺数字化设计是铸造业的共性基础问题，随着数字化技术的不断革新与制造业的分工合作，铸造业上下游企业以多源中性文件交换零件图纸，导致原有的数字化设计方法不再适用，严重制约铸件的工艺设计与生产周期。针对此问题，本项目开展基于多源中性文件的铸造工艺数字化设计机理与方法研究。在机理层，提出多源中性文件概念和原理，建立“铸造工艺、设计参数、方案及工艺几何特征”耦合模型。在方法层，研究二维中性文件零件结构精确快速解析方法，提出零件结构局部特征交互式动态实时提取方法，构建二维铸造工艺精确快速设计体系；研究三维中性文件零件结构精确快速解析方法，建立基于三维中性文件的铸造工艺自动化设计方法。在应用层，构建基于多源中性文件的数字化铸造工艺设计工具，并展开实践研究。本项目将多源中性文件与工艺设计深度融合，为铸造工艺数字化设计提供新方法，具有重要的科学意义和广泛的应用前景。

针对当前铸造企业在多源中性文件下铸造工艺设计与绘图周期长这一瓶颈问题，突破传统铸造工艺CAD系统不支持多源中性文件、工艺设计与工艺几何特征耦合关系复杂的局限，开展了基于多源中性文件的铸造工艺数字化设计机理与方法研究。提出了多源中性文件概念和原理，建立了“铸造工艺、设计参数、方案及工艺几何特征”耦合模型。在方法层，实现了二维中性文件零件结构精确快速解析，提出了零件结构局部特征交互式动态实时提取方法，构建了二维铸造工艺精确快速设计体系；实现了三维中性文件零件结构精确快速解析，建立了基于三维中性文件的铸造工艺自动化设计方法。在应用方面，研发了基于多源中性文件的数字化铸造工艺设计工具，并成功应用于多个产品的铸造工艺设计，为铸造工艺数字化设计提供新方法。

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