数控拉弯仿真系统及其关键技术研究

【作者】 王跃轩；

【导师】 陶华；

【作者基本信息】 西北工业大学 ， 航空宇航制造工程， 2003， 硕士

【摘要】 随着计算机软硬件技术、网络技术和信息技术的发展，在柔性制造、计算机集成制造的基础上，虚拟制造作为一种新的制造理念和技术应运而生。加工过程仿真作为虚拟制造中的关键技术，是虚拟制造领域中的一个重要研究方向，而且也有很大的应用价值。 本文首先在分析拉弯成形特点的基础上，研究了虚拟拉弯环境的系统结构及其关键技术，提出了三维虚拟数控拉弯环境中物理设备几何建模、运动学建模、NC代码解析与验证，以及切点计算的解决方案。随后，对虚拟拉弯环境中的碰撞检测算法进行了研究，提出在虚拟拉弯环境中采用遍历三角形算法进行三维物体之间的碰撞检测；同时为提高碰撞检测效率和图形绘制的实时性，引入细节层次(Level of Detail)模型中基于二次误差矩阵的顶点对收缩三角面片简化算法。最后，完成了对数控拉弯过程仿真软件的设计，并开发了三维虚拟拉弯环境原型系统。更多还原

【Abstract】 With the development of computer software and hardware technology, network and information technology, some new manufacturing concepts and theories arise on the foundation of flexible manufacturing technology and computer integrated manufacturing technology. One of these is VM (Virtual Manufacturing). As a key of VMT (Virtual Manufacturing Technology), the simulation of NC (Numerical Control) manufacturing has an important status in this field. Moreover, it also has great value in application.In my paper, at first I research the system architecture and key technology of virtual stretch bending environment. Solutions for physical device’s geometric modeling, kinetic modeling, NC program interpretation and verification and tangent point calculation are worked out based on the analysis of characteristics of stretch bending. Then, 1 introduce the algorithm of collision detection based on searching all the triangles of object to the virtual stretch bending environment and make use of vertex pair contraction surface simplification using quadric error metrics in another field of LOD (Level of Detail) for the efficiency of dectection and real-time 3D rendering. At last, I also complete the task of designing strech bending process simulation software. The prototype system of 3D virtual stretch bending environment has been developed.更多还原