并行工程在汽车车身开发与制造上的应用

本文分析了常规车身ＣＡＤ／ＣＡＭ技术所存在的弊病,提出了采用并行工程的原理进行车身开发及车身工装设计与制造的方法。重点介绍了实施车身并行工程要解决的关键性技术,诸如建立集成化的产品数据模型、ＣＡＤ／ＣＡＰＰ／ＣＡＭ集成技术、建立多功能小组、计算机技术支持等。     

基于OpenGL的快速原形制造系统仿真

随着计算机技术的发展,可视化仿真和快速原形制造RPM已经成为CAD/CAM仿真领域的热点.文中介绍了RPM可视化仿真系统的总体结构和软件设计思想,为了实现数控机床加工零件产品的快速原形制造系统,提出了一种基于AutoCADRl4、VisualC 6.0和OpenGL语言的RPM技术实现方案.该方案利用VisualC 6.0作为系统开发平台,使用目前通用的3D图形API标准,可以方便地将AutoCADRl4输出的STL文件利用OpenGL进行三维真实感显示,并可以根据需要实现各种视图变换操作.最后给出了一个仿真结果,验证了该系统的性能.     

某研究所CIMS实现浅见

首先对CIMS进行了简述,然后介绍了某研究所科研生产的现状,最后提出某研究所实现CIMS的可能途径。     

《CAD/CAM》课程基于工作过程的教学研究与实践

通过对《机械CAD/CAM》课程的教学现状分析,结合《机械CAD/CAM》教学方法改革及学生创新能力培养的研究,在新条件下对课程教学体系、教学内容、教学方法和教学手段的改革进行探讨。     

四自由度复合材料回转体缠绕机控制系统

针对传统工控机加板卡式运动控制器在复合材料生产中存在稳定性差、同步控制精度低等问题,采用电子凸轮的位置跟踪方式,建立了回转体数学模型,并给出了丝嘴的运动轨迹,研制了基于嵌入式运动控制器的四自由度复合材料回转体缠绕机控制系统.该系统能够自动完成丝嘴运动轨迹规划及后续G代码生成和输出的功能,提高了系统的可靠性;G代码输出提高了控制系统的开放性;基于电子凸轮的小车、伸臂、纱梳跟随主轴的同步运动控制精度确高、可靠性好,实现了多种规格容器的缠绕成型.     

Digital Manufacture Techniques for Large Hydro Turbine's Blades

Blades are one of the vital components and most difficulty in manufacturing of large hydro turbines.In order to cost-effectively and productively manufacture these kinds of blades,a series of digital techniques in manufacturing have been devel- oped,which includes digital design of hydro turbine blades based on manufacture' requirements,Computer-aided location and the machined error evaluation by using 3-dimensional digitized measuring,tool path generation strategy to meet requirements of en- hancing machining efficiency and controlling deviation in NC machining,tool path generation and NC machining simulation by es- tablishing a virtual NC machining environment for blades,and reasonable and feasible strategy and the systematic scheme for man- ufacturing of large blades by using 5-axis simultaneous CNC machining.The developed digital manufacture techniques have been successfully applied in manufacturing of both the large Kaplan and Francis hydraulic turbine blades;it shows that higher efficiency and the better surfaces finish accuracy can be achieved.     

基于CAM的雷达信号实时预分选硬件实现

CAM(内容可寻址存储器)是一种快速匹配存储器件,在通信、雷达等许多领域有着广泛的应用。在介绍CAM基本原理的基础上,例举了一种基于CAM实现关联比较器的设计方法,通过仿真验证了设计的正确性,基本上实现了雷达信号的纯硬件快速预分选,达到了实时性和可靠性要求。     

注塑模CAD/CAM/CAE的系统集成

描述了以CAD／CAM软件Pro／E及注塑模分析软件为平台，采用系统集成的方式，并运用Pro／E的二次开发工具Pro／TOOLKIT，按并行工程思想，对注塑模CAD／CAM／CAE系统的设计和开发进行的分析和研究．     

Decomposition and reconstitution principle for complex surfaces and its applications

Though there are already a variety of models for complex surfaces, they are not so convenient as needed in practice. A hierarchical model and the principle of decomposition and reconstitution for complex surfaces have been proposed, which have the potential to enhance the support of automated design systems on creative work intelligently Then the progress made is discussed involving the applications of the new principle in the following three areas:conjugation surface calculation, tool path generation in numerically controlled machining, and machining process innovation by re-recognition