【作者】 赖南辉；

【导师】 吴黎明；

【作者基本信息】 广东工业大学 ， 测试计量技术及仪器， 2008， 硕士

【摘要】 面对发动机气门生产流程日益复杂化、用户需求多样化,市场竞争不断加剧,传统的设计已经很难适应这些变化,尤其体现在生产线可视化交互和实时监控的先进性和创造性需求方面,这也是用户在方案设计阶段最为关注的。采用虚拟制造技术可以解决这些问题,并为制造系统规划设计提供了新的思路和手段。它是多个学科领域知识的综合集成与应用,计算机仿真、建模和优化技术是虚拟制造的核心关键技术。对设计、制造等生产过程进行统一建模,在产品设计阶段或产品制造之前,就能真实地模拟出产品的未来制造全过程及其对产品设计的影响,预测产品的性能、成本及可制造性,及早地发现和解决潜在问题,从而更有效、更经济、更灵活地组织生产,达到缩短产品开发周期、降低成本、提高生产效率的目的。本文主要研究虚拟制造技术在发动机气门生产线中的实现。首先,分析了虚拟制造技术的关键技术和研究现状;接着,分析发动机气门成形加工的状况及关键流程,并指出设计中存在的不足,提出了虚拟生产线的设计框架;再接着,在设计框架的指导下,在Multigen Creator中建立生产设备的3D模型外观,并应用面向对象技术,通过对虚拟设备行为抽象,分析归纳各类生产设备的共同和独特的属性与行为,建立了相应的设备模型库,为制造单元的设备布局设计以及快速重组设计提供了有效的建模和分析工具。然后,在研究Vega相关的虚拟现实技术的基础上,利用设备模型库和Visual C++的MFC类库开发虚拟工厂系统,实现了快速布局和生产流程仿真功能。最后,论文设计了简单的调度对象和基本的调度方案,让系统能进行简单的生产仿真。本论文首次在发动机气门加工中实现了虚拟生产线的新思路,为以后建立与工厂的日常生产全面结合的接口,进行可视化的监控和管理提供了一种新的平台。本文成功地实现了虚拟制造技术的应用,实时模拟出产品的未来制造过程,为对气门加工工艺流程的改进和新质量检测技术的进一步研究奠定了基础。更多还原

【Abstract】 Facing the increasingly complication of the engine valve production procedure, diversification of user demands and sharpening market competition, it is very difficult for the tradition technique of design to adapt these changes, especially in the demand of advancement and creativity in visual interaction of production line and real-time monitoring. They are what the customers pay the most attention to in scheme design stage. The can not satisfy these requirements, not to mention the real-time interaction in design process. The adoption of virtual manufacturing can solve these problems. It provides new ideas and methods for manufacture system layout. It is the meta-synthesis and appliance of multidisciplinary. Its crucial technologies include computer simulation, modeling and optimization technique. It can model uniformly in design and manufacture. The whole manufacture process and the affects are simulated in advance to forecast the performance, cost and manufacturability of the product to find and resolve the latent problem as early as possible, so that the production can be organized more effectively, economically and flexibly. It can shorten the development cycle, reduce the cost and lower the decision risk.This application of virtual manufacturing in engine valve production is mainly studied in this paper. First, key technologies and research status of virtual manufacture are analyzed. Then, the situation of valve forming and key processes are analyzed. The the existing flaws are pointed out, and the design frame of virtual production line is put forward. And then, 3D models are built in Multigen Creator. Using object-oriented method, behavior of the virtual equipments is abstracted. Properties and behavior in common and unique are analyzed. Corresponding model library is built. It provides an effective tool for modeling and analysis of the facility layout and reconfiguration rapidly of manufacturing cell. Then, based on VR technology of Vega, model library and MFC of Visual C++ are used to develop the virtual factory. Quick layout and production process simulation is realized. Finally, simple scheduling objects and plan are designed to simulate the production. The new way of virtual production line using in production and processing of engine valve is implemented for the first time. It offers a new platform for the interface to the routine production, and for the visual monitoring and management in future. Application of virtual manufacturing is realized successfully in the thesis. The whole process of product’s manufacture in the future is simulated in real time. This will lay the foundation for modification of treatment process and research on quality detection in future.更多还原