基于web的网络数控系统

介绍了一个基于Web的网络数控系统。通过Internet／Intranet网络把数控机床等设备与CAD／CAM软件集成起来，实现了设计、数控编程、数控加工的功能。该系统不仅可以用于科研开发，还可用于CAD、CAM等实验教学工作。     

基于UG逆向工程对涡轮的计算机辅助加工

为提高涡轮曲面数控加工的工件成型质量，基于UG／CAD／CAM软件集成环境，对逆向工程申重构出的涡轮曲面CAD模型进行数控加工编程的方法和原则进行了讨论，提出对涡轮的数控编程加工方法并在粗加工与精加工中获得较高的成型质量和加工效率。     

基于CAD/CAM集成的鞋楦快速逆向成型技术研究

研究了鞋楦的快速数字化原型技术，采用三维卤光扫描仪，快速获取原始数据；利用Geomagic软件对点云进行诸如补洞，简化等有效处理，输出．obj文件到自行开发的系统中；交互调整楦的初姑位置并自动识别鞋楦的关键特征点，对鞋楦进行整体缩放或指定特征尺寸缩放；通过镜像，自动生成另一只对应鞋楦；数据以STL格式直接输入到快速成型机进行加工，从而实现了三维扫描仪作为输入，快速成型机作为输出的集成CAD／CAM系统。     

利用UG软件实现数控加工中心一体化加工

通过对UG软件的学习和逐步掌握,应用UG NX 2.0软件的建模和加工模块,针对典型零件进行CAD/CAM零件的建模和加工,完成零件CAD建模→零件CAM加工设计和仿真→机床后置处理转换→生成数控程序→数控加工过程。探索UG软件实施生产加工的可行性,提高生产加工能力。     

基于CAD/CAM软件的鞋楦逆向设计与制造

本文运用CAD/CAM软件—Geomagic Studio、CimatronE,以鞋楦逆向设计为实例,论述了点云处理、错误修复、曲面生成的方法,对样品鞋进行逆向设计及数控加工程序编制,提出了一套完整的鞋楦逆向设计及数控加工的方法,并为模具设计提供了建构复杂曲面模型的有效途径。     

纸盆模具CAD/CAM软件设计

介绍纸盆模具CAD／CAM软件的系统功能建模，分析软件系统中的关键技术－曲面建模技术，描述了系统从零件参数和工艺参数输入到刀具轨迹生成、曲面真实感显示和数控指令生成等各项功能。本系统的设计方法和曲面造型技术可应用于其它的基于Windows的中小型CAD／CAM系统开发。     

基于Internet的网络数控系统

介绍了一个基于Internet的网络数控系统。通过Internet／Intranet网络把数控机床等设备与CAD／CAM软件集成起来，实现了设计、数控编程、数控加工等功能的集成。     

并联机床加工船用螺旋桨及CAM技术研究

主要研究用并联机床加工整体式船用螺旋桨的技术以及用CAD／CAM系统进行螺旋桨辅助加工的方法。研究了并联机床加工螺旋桨的工艺方案，提出了加工螺旋桨的并串联多轴数控加工系统，分析了螺旋桨数控加工的工艺过程；介绍了在UG／CAM环境下进行螺旋桨加工的刀具轨迹编程和用Vericut加工仿真系统进行加工仿真的方法和过程；并进行加工实验。用于加工螺旋桨的并联机床具有结构简单，造价低和占地面积小等优点，具有广泛的应用价值和发展前景。     

面向并联机床的CAD/CAM/CNC系统集成体系

借鉴通用CAD／CAM系统特点和开发思想的基础上，提出面向并联机床BJ—30(哈尔滨工业大学研制)的CAD／CAM／CNC集成系统的总体结构。为便于系统的执行和维护，系统采用了面向对象的模块化结构设计思想，用户可以在统一的模式下完成从曲面设计到数控加工的全部过程。由于系统完全是自主开发的，系统容易实现客户化，以满足并联机床功能需求的变化。     

CAM系统中曲面图形信息的提取

本文在商品化CAM软件SURFCAM和CAD软件CADKEY基础上，提出了在由三维曲面图形转换为二维轮廓图的设计思想，避开了在二维图形支撑软件上开发三维曲面或实体造型向CAM传递数据的工作，并最终实现从CAM系统向CAD系统的数据传送，为结构计算工程图纸输出提供依据，使设计和数控加工可靠地实现一体化。     

Shoe Last Machining Using Virtual Digitising

Shoe lasts are the moulds used in the footwear industry in order to mount the shoe. Most of the machines used in the sector to make lasts are simply mechanical copiers. CAD/CAM systems have just arrived in the shoe last market but their accuracy and efficiency is no better than traditional machines, and so it is difficult to persuade the industry to adopt new systems. A tool-path generation algorithm that takes advantage of traditional copier systems that do not fulfil the CNC standards is presented in this paper. The tool path is computed from a "virtually digitised" model of the last surface. The algorithm is then analysed in terms of computing cost and accuracy, and refined by applying a series of optimisations. Some computer architectures are proposed in order to reduce the computation time. The proposed algorithm has been successfully implemented in a commercial CAD/CAM system specialised for shoe-last making. Finally, some illustrative examples are given.     

Rapid parametric design methods for shoe-last customization

With the development of computer-aided design (CAD) technology and increasing demands of customized footwear, shoe-lasts are requested to be designed rapidly so as to speed-up the process of footwear manufacturing. Thus, this study presents a CAD system for shoe-last rapid customized design based on the piecewise reconstruction to realize the interactive deformation and separate/global shoe-last form reuse. First, piecewise remodeling method is proposed based on the multi-layer parametric definition and contour curves are extracted from the mesh. Then, five types of proper constraints to support surface manipulation are proposed, and the draft-driven deformation by the contour curve bending can realize the interactive local surface design in free angle of view. Finally, shoe-last styles can be saved and reused globally or separately to share design results between different shoe-lasts. Experimental examples show that customized shoe-lasts can be easily and rapidly generated by adopting the parametric design methods.     

Selecting and prioritizing key factors for CAD/CAM software in small- and medium-sized enterprises using AHP

In today’s fast-paced world, computer-aided design/computer-aided manufacturing (CAD/CAM) systems have become a necessary element in manufacturing industries. Prior to investment in a CAD/CAM system, it is essential for investor to know how to maximize their benefits from buying a new or by changing an existing CAD/CAM system. The purpose of this study is to provide a methodology to assist small- and medium-sized manufacturing companies of Pakistan in selecting a CAD/CAM system. It will also facilitate the software providers in recognizing the current state of affairs as well as preceding problems regarding the application of CAD/CAM in manufacturing firms when assisting them in choosing the direction for future development simultaneously. To accomplish this purpose, data have been collected about current CAD/CAM systems. Important criteria for system selection and parameters for evaluation have also been identified and prioritized. Analytic hierarchy process (AHP) is used as a decision-making technique for identifying and prioritizing important factors for CAD/CAM software selection. Expert Choice (AHP-based software) has been used to validate the results.     

Selecting and prioritizing key factors for CAD/CAM software in small- and medium-sized enterprises using AHP

In today’s fast-paced world, computer-aided design/computer-aided manufacturing (CAD/CAM) systems have become a necessary element in manufacturing industries. Prior to investment in a CAD/CAM system, it is essential for investor to know how to maximize their benefits from buying a new or by changing an existing CAD/CAM system. The purpose of this study is to provide a methodology to assist small- and medium-sized manufacturing companies of Pakistan in selecting a CAD/CAM system. It will also facilitate the software providers in recognizing the current state of affairs as well as preceding problems regarding the application of CAD/CAM in manufacturing firms when assisting them in choosing the direction for future development simultaneously. To accomplish this purpose, data have been collected about current CAD/CAM systems. Important criteria for system selection and parameters for evaluation have also been identified and prioritized. Analytic hierarchy process (AHP) is used as a decision-making technique for identifying and prioritizing important factors for CAD/CAM software selection. Expert Choice (AHP-based software) has been used to validate the results.     

企业CAD／CAM技术应用的一些思考

针对企业实施CAD／CAM技术的实际状况,提出了CAD／CAM系统的选择原则;在对现有的主流CAD／CAM软件进行分类和评述的基础上,指出集成的CAD／CAM软件才是企业实施CAD技术的关键,并给出了具体方案。     

应用于CAD/CAM的基于点的几何模型

常规几何模型通常难以胜任一些复杂曲面产品的计算机辅助设计／计算机辅助制造问题，为此，提出了应用于计算机辅助设计／计算机辅助制造的基于点的几何模型概念，给出了基于点的几何模型的定义及其计算机辅助设计／计算机辅助制造应用流程，研究了基于点的几何模型的几何特性、计算机辅助设计方法、计算机辅助制造方法及其计算机辅助设计／计算机辅助制造系统开发方法。在鞋楦计算机辅助设计／计算机辅助制造中的应用表明，基于点的几何模型有常规几何模型所没有的特性，能够实现某些特殊产品的计算机辅助设计／计算机辅助制造。     

基于Web的同步协同CAD/CAM系统的数据交换机制

基于Web的协同CAD/CAM技术是网络环境下数字化设计与制造的一个重要研究方向。本文结合同步协同CAD/CAM原型系统C SupermanCAD/CAM的开发 ,提出了一种在同步协同CAD/CAM系统中进行操作命令、三维几何数据和多媒体数据交换的解决方案 ,为面向 2 1世纪的新一代制造技术的实现提供了可靠的保证。     

建筑电气模具CAD/CAM系统的应用研究

与外国著名建筑电气公司相比,国内建筑电气产品存在着较大的差距,这主要是由于国内模具设计制造水平低,发展速度慢引起的。为了提高市场竞争力,规划与实施模具ＣＡＤ／ＣＡＭ已成为国内建筑电气企业寻求发展的必经之路,规划与实施模具ＣＡＤ／ＣＡＭ系统需要解决许多技术要点,包括模具ＣＡＤ技术,模具ＣＡＭ技术以及模具ＣＡＤ／ＣＡＭ一体化技术,杭州鸿雁电器公司实施建筑电气模具ＣＡＤ／ＣＡＭ系统取得了明显效果。     

应用STEP和STEP-NC实现CAD/CAPP系统集成

CAD和CAPP系统的集成一直是一个研究中的难题，其原因在于由于信息表达的不一致，使CAPP系统需要针对不同的CAD系统设计专门的信息提取模块，而对于CAPP下游来说，CAM也不能利用全部的产品设计和工艺信息。STEP标准作为CAD系统的输出，可以为OAPP系统提取信息提供一个统一的接口。而STEP—NC作为新一代数控标准，继承了STEP标准的属性，可以作为CAD／CAPP／CAM／CNC集成的桥梁。应用STEP中性文件，CAPP提取产品的制造特征和加工工步，生成工艺文件，并以STEP—NC中性文件形式输出，便于后续CAM和CNC系统的调用，从而达到CAD／CAPP／CAM／CNC信息集成的目的。     

基于脚部三维扫描的鞋楦建模方法研究

对脚部进行三维扫描,经过网格处理,采用特征节点和特征曲线及其拓扑关系建立脚部特征模型;以脚部特征模型上的特征节点和曲线建立局部坐标系,确定鞋楦特征模板上的顶点,并完成特征模板上顶点的拓扑关系;通过2D曲线的输入,建立鞋楦侧轮廓,底面和统口轮廓曲线;最后,对鞋楦曲面做细分处理,实现了一个符合扫描脚部模型特征和定制轮廓的鞋楦造型工作。