基于AUTOCAD-API的机器人几何造型的装配算法

在机器人仿真与离线编程中，机器人和工作环境几何造型的部件装配算法十分重要，但其简洁性却依赖于所使用的几何造型平台，本文提出一基于ＡＵＴＯ ＣＡＤ的ＡＰＩ三维实体造型系统的机器人部件的图形装配算法，该算法简洁实用、高效率和高精度。     

刀具CAD中的三维立体造型技术

本文介绍了刀具ＣＡＤ图形处理中的三维立体造型技术。采用几何体素构造法和变差几何法参数化实体造型技术来生成加工中心刀具的绘图模型，并给出了按拓扑关系自动查询图形数据库的方法。     

AutoCAD三维图形剖切功能的实现

本文介绍了对ＡｕｔｏＣＡＤ三维图形实现剖切功能的方法，并编制了相应的实用软件。在ＡｕｔｏＣＡＤ系统下，调入被剖切后的图形数据，就可由Ｖｐｏｉｎｔ和Ｄｖｉｅｗ命令分别生成轴测剖视图和透视剖视图。从而为利用ＡｕｔｏＣＡＤ三维造型提供了强有力的辅助手段。     

CAD中三维交互技术的研究与实现

本文研究了ＶＲ技术在ＣＡＤ几何造型中作为交互手段的应用,特别研究了三维交互技术在ＣＡＤ中的实现。通过提出一种用于三维交互的精确视觉线索方法,实现了对三维空间中不同信实体相互位置关系的精确感知。探讨了ＣＡＤ中在三维交互技术支持下的新的几何造型技术。     

产品造型的几种方法

产品造型的几种方法江苏广播电视大学陈为几何造型是ＣＡＤ系统中的关键技术，在现有成熟的ＣＡＤ系统中，常用的几何造型方法有：线框造型、曲面造型和实体造型。１线框造型（ｗｉｒｅｆｒａｍｅｍｏｄｅｌ）线框造型以空间顶点、棱线表示三维形体。它是ＣＡＤ中最早用来...     

非流形几何建模拓扑数据结构的研究

当前ＣＡＤ技术的发展趋势是特征造型、行为建模、信息集成。几何建模作为ＣＡＤ系统的核心,是影响ＣＡＤ系统功能的重要因素。非流形几何建模可以用统一的数据结构来表示线框、曲面、实体模型,从而为在底层实现特征造型、变量化设计、行为建模提供了可能。本文概括了非流形几何建模的基础理论知识,提出了一种基于非流形几何建模的新型拓扑数据结构,应用ＯＯＰ及开放式软件开发思想探讨了开发具有自主知识产权的三维实体ＣＡＤ平     

非流形几何建模拓扑数据结构的研究

当前ＣＡＤ技术的发展趋势是特征造型,行为建模、信息集成。几何建模作为ＣＡＤ系统的核心,是影响ＣＡＤ系统功能的重要因素。非流形几何建模可以用统一的数据结构来表示线框、曲面、实体模型,从而为在底层实现特征造型。变量化设计、行为建模提供了可能。本文概括了非流形几何建模的基础理论知识,提出了一种基于非流形几何建模的新型拓扑数据结构,应用ＯＯＰ及开放式软件开发思想探讨了开发具有自主知识产权的三维实体ＣＡＤ平台拓扑数据结构的实现。     

ARX开发环境下基于MDT API的二次开发技术

一、引言ＭＤＴ（ＡｕｔｏＣＡＤＭｅｃｈａｎｉｃａｌＤｅｓｋｔｏｐ）是在ＡｕｔｏＣＡＤ基础上开发的通用三维机械ＣＡＤ平台,主要包括机械ＣＡＤ参数化特征造型、曲面造型和装配造型三大部分。当前,以ＭＤＴ作为ＣＡＤ／ＣＡＭ／ＣＡＥ集成系统的一体化解决方案引起了人们的广泛关注。ＭＤＴ建立的机械产品建模可直接完成如下功能：装配干涉检验;零部件质量特性分析;自动生成装配分解图;生成零件工程图;生成部件及产品装配图（区分剖面线,自动完成阶梯剖）;生成产品渲染图;标注装配序号,自动生成ＢＯＭ表。要对零件模型进行有…     

用于铁道车辆CAD系统图形生成的一种数据重用技术

图形生成过程中,对现有数据资源的重用对提高ＣＡＤ系统的工作效率和质量具有重要意义。本文介绍了在系列化２５型铁路客车ＣＡＤ系统施工设计过程中所采用的一种数据重用技术,它在ＡｕｔｏＣＡＤ平台上,从系统已有数据集中自动提取零件图绘制过程所需的几何拓扑数据并加以重复利用。     

AUTO CAD辅助微机3DS二维造型,三维放样模块系统

本文着重介绍了ＡＵＴＯＣＡＤ三维造型原理及如何利用ＤＸＦ文件将ＡＵＴＯＣＡＤ能实现复杂的二维、三维图形转换到３ＤＳ能利用二、三维图形的方法，从而弥补３ＤＳ中二维编辑模块和三维放样模块较难实现复杂的二、三维图形的缺陷。     

基于CAD/CAE的卡扣模具快速设计与优化

为提高塑料卡扣模具设计的速度,利用ImageWare对塑料卡扣进行点云数据处理、特征线网格划分和曲面重构;将重构的塑料卡扣模型导入UG,借助UG的曲面修复功能缝合不连续的曲面,并以STL格式保存;利用UG的Mold Wizards模具设计模块,根据已保存的STL格式卡扣模型建立模具装配模型,设计分型面,生成模具成型零件的三维实体模型;用Moldflow/MPI进行塑料卡扣注射成型分析.结果表明采用优化后的模具设计参数与实验结果基本吻合。     

An object-oriented approach to computer-aided design of a plastic injection mould

This paper describes a knowledge-based and object-oriented approach for the design of the feed system for plastic injection moulds. The gating system of a plastic injection mould plays a significant role in producing a quality part. Designing of this gating system entails a great amount of effort from an experienced designer and it is time-consuming. CADFEED (Computer-Aided Design of the FEED system of the plastic injection mould) is developed to accurately and efficiently design the type, location and size of a gating system of a plastic injection mould. This system provides an accurate and fast means of obtaining solutions based on the users' requirements, which are easily handled by the rating algorithm in the system. CADFEED generates acceptable solutions at a lower cost than most traditionally and commercially available analysis packages. This system can be used to verify designs proposed by the design engineers. It can also help novice engineers in the understanding of mould design. Another important feature of CADFEED is that it is a low cost system, which uses AutoCAD and an expert system shell on a personal computer. This feature makes CADFEED easily affordable by small-scale industries.     

基于Pro/ENGINEER的注塑模电极工程图模块设计

针对所开发的注塑模电极CAD系统,利用Pro/E提供的二次开发工具Pro/TOOLKIT和MFC对话框技术,在Visual C++ 6.0编译环境下,对Pro/E的工程图模块进行二次开发,实现了注塑模电极工程图的自动生成,提高了注塑模电极工程图的设计效率。     

虚拟塑料注塑成型教学系统

塑料注射成型技术的发展与注射模具设计人员需求的增长十分迅速，模具设计人员学习必要的塑料成型基本原理是掌握注射模具设计方法的现实需要。该文在虚拟现实（VR）技术的基础上，结合基于三维模型的注塑成型FEA技术、面向对象的编程技术和OpenGL图形库，研究并实现了沉浸式、交互式的虚拟塑料注射成型教学仿真系统（VPIM），提出了立体成像算法，给出了模拟注射成型过程运动仿真的方法，借助VR外设及通过建立知识化、数字化、可视化、现实化的教学平台来提高设计人员的学习效率、学习兴趣及对问题理解的深入程度。     

Solidworks在铸造模型设计制造过程中的应用

长期以来,铸造用模的制造一直沿袭着零件图→铸造工艺图→模块设计放样→制造组合这一程序,制造周期长,成为新产品开发的瓶颈。我们应用计算机三维软件Solidworks将产品图纸转化为电子图形,然后结合铸造工艺参数直接编辑修正成放样图,实现了产品设计与模型制造交叉作业、相互验证,大大加快了模型制造的进度,提高了模型质量。     

计算机辅助模拟注射模充模过程

在注射成形过程中 ,塑料熔体的流动状况是决定塑件质量的重要因素 ,运用注射成形流动模拟软件可以准确模拟塑料熔体的整个充模过程 ,优化塑料熔件的流动场 ,以找到最合适的浇注系统及尺寸。     

用Java3D技术开发基于因特网的CAE系统

分析了在网络环境下Java3D的图形处理优势，就开发基于互联网的三维注塑成型流动模拟系统中的三维图形定位、显示控制以及在浏览器环境下的动态模拟显示数据的刷新问题进行了探讨，这些技术已经成功地用于基于网络的注塑成型流动模拟系统中．     

Modeling of multi-connected porous passageway for mould cooling

Cooling channel design in the plastic injection moulding process is of paramount importance to the performance of the mould, influencing the quality of the parts being produced and productivity of the process. However, cooling channel design is usually limited to relatively simple configurations as well as conventional machining processes, such as straight-line drilling, and milling, etc. The cooling performance may not meet the expectations of the mould engineers.This paper proposes an alternative design method for a conformal cooling passageway with multi-connected porous characteristics based on the duality principle. The proposed method can provide a more uniform cooling performance between the mould plate and the conformal cooling passageway than the existing conformal cooling channel design. Injection mould defects like warpage or hot spots can be avoided.In this study, a 3D mould plate model was offset negatively and the location of the proposed multi-connected porous cooling passageway was identified. The negatively offset model was decomposed into a finite number of cubical cells via the sub-boundary spatial enumerated cell decomposition. Then a duality relationship between the primal and the dual graphs was developed. This provided the preliminary layout of the multi-connected porous passageway for the coolant flow in multiple directions. The cooling channel axis design of the multi-connected porous passageway, illustrated by the skeleton from the dual graph, was created. Following a Boolean difference operation, the proposed multi-connected porous cooling passageway inside the mould plate was able to be generated and fabricated with the aid of rapid tooling technologies. A real-life case study for the design of a multi-connected porous cooling passageway was implemented and examined. The effects of coolant flow and cooling performances, analyzed by computational fluid dynamics simulation, were validated.     

基于ADAM的平膜拉丝机远程监控系统

塑料平膜拉丝机是将颗粒状的塑料原料经过加热、挤压、自然沿垂、拉伸、切割、收丝等工序加工成用于塑料编织袋编织的塑料细丝，其工艺过程对温度、拉伸速度有着严格的要求。研华ADAM远程模块是基于RS-485总线形式的远程监控模块，具有工作稳定、传输距离远等特点，利用远程模块数据检测与组态王组态软件实现的塑料平膜拉丝机远程监控系统较好地满足了各项工艺指标的要求。     

Runner sizing in multiple cavity injection mould by non-dominated sorting genetic algorithm

Runner system is important in the plastic injection moulding as it affects the part quality and the material costs. The layout of the runners for a multiple non-identical cavity mould is geometrically imbalance. Even for a multiple identical cavity mould, the layout can be imbalance due to various reasons. This paper presents an approach to balance the flow by adjusting the runner sizes. Runner size determination is a multiobjective optimisation problem. The non-dominated sorting genetic algorithm is adopted for determining the runner sizes. Multiple objective functions including runner balancing, part quality in terms of warpage and runner volume are incorporated into the algorithm. The moulding conditions affecting the mould cavity filling are also determined due to their sensitivity to runner sizes. This runner sizing approach is suitable for the geometric imbalance mouldings and family mouldings.