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.     

Cloud manufacturing service platform for small- and medium-sized enterprises

In order to address the key problems faced by small- and medium-sized enterprises (SMEs), existing solutions and shortcomings were analyzed. The possibilities by using the new emerged technologies and theories (e.g., cloud computing, internet of things, service-oriented technology) to solve the bottlenecks faced by SMEs are investigated. The idea of manufacturing resource and capability sharing based on cloud computing for SME is discussed, and an SME-oriented cloud manufacturing service platform (SME-CMfgSP) is introduced. The architecture of SME-CMfgSP is proposed, and the key technologies for implementing SME-CMfgSP are introduced in details. The challenges for implementing cloud manufacturing service platform for SMEs were discussed. A case study is described to illustrate the application of the proposed SME-CMfgSP.     

汽轮机叶片CAD/CAM软件开发

由于通用CAD/CAM软件存在难以实现汽轮机叶片参数化三维建模,在变轴加工过程中不能进行变前倾角、变侧倾角加工和拐角减速等问题,开发了汽轮机叶片CAD/CAM软件.软件通过研究汽轮机叶片各曲面特征建模方法,实现叶片零件参数化建模;通过研究刀具轨迹计算公式,设置叶片各曲面段不同工艺参数,获得了叶片粗加工、螺旋精加工和清根加工的变参数轨迹规划方法,并解决了以上问题.     

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。     

国内外CAD/CAM软件

针对目前国内外市场上CAD/CAM软件纷繁芜杂的现状,对常用的CAD软件和国外CAD/CAM一体化软件的特点及其应用情况做了简要介绍,可为设计人员选择时提供帮助。     

基于Pro/Engineer的注塑模具CAD/CAM

Pro/Engineer软件采用单一数据库和参数化造型技术,具备概念设计、基础设计和详细设计的功能,为注塑模具的集成制造提供了良好的平台。本文在阐述Pro/Engineer软件的技术特点基础上,指出了Pro/Engineer能够很好地满足现代生产中对模具制造的快速响应的要求,总结归纳了基于Pro/Engineer的注塑模具设计流程,最后,以一个收音机上盖模具为例,对设计流程进行了简单阐述。     

CAD/CAM软件及选择原则

随着计算机的广泛应用和制造技术的不断进步,CAD/CAM一体化的优越性日益突出。这里针对目前国内外市场上CAD/CAM软件纷繁的现状,对常用的CAD软件和国外CAD/CAM一体化软件的特点及选用原则做了简要介绍,可为设计人员选择时提供帮助。     

用ARX开发工装CAD/CAM软件

ARX是AutoCAD二次开发平台的重要组成部分。阐述了基于AutoCAD开发工装CAD/CAM软件的设计流程和内在关键技术。     

模具CAD/CAE/CAM技术的发展及软件应用

概括了模具CAD/CAE/CAM技术的优势和内容,概述了国内外常用的CAD/CAE/CAM软件,主要介绍了几种小型CAD/CAE/CAM软件、大型集成CAD/CAE/CAM软件以及有限元分析专业软件.随着模具CAD/CAE]CAM技术朝着集成化、网络化、标准化、专业化、开放性、虚拟化、专业化和智能化方向发展,其必将在产品设计与制造中发挥越来越重要的作用.     

轴流式叶轮端铣加工刀具轨迹生成研究

为提高曲面求交算法的计算效率,改进五坐标自由曲面端铣加工在工程应用中的不足,对轴流式整体叶轮端铣加工的关键技术进行了研究。利用B样条曲线的局部性质,通过恰当选取迭代初始值,提高了曲面求交算法的计算效率;改进了参数筛选法确定刀具轨迹步长的算法,缩短了生成程序的长度,提高了加工效率。依据上述算法自主开发了轴流式整体叶轮专用计算机辅助设计/计算机辅助制造软件,并对该软件生成的刀具轨迹进行了仿真和实际加工验证。仿真和实验结果证明本文提出的算法切实可行,对开发具有自主版权的计算机辅助设计/计算机辅助制造软件有一定的借鉴意义。     

机械CAD／CAE／CAM／PDM软件的发展现状和应用

机械CAD／CAE／CAM／PDM软件的发展现状和国内外软件公司介绍及应用。     

基于UG的鞋楦CAD/CAM系统开发

鞋楦是制鞋的重要模具,开发鞋楦CAD／CAM系统是提高鞋楦设计制造水平的根本方式。结合目前CAD／CAM技术发展特点,研究了基于UG软件的系统实现方法。给出了系统实现框架;采用离散设计方法和UG软件的点、线、面造型功能,实现鞋楦模型的建立和修改;分析了鞋楦数控加工原理,利用UG的变轴铣削加工功能,由UG／Open GRIP NC实现自动的鞋楦数控编程;最后给出了系统开发的成功实例。     

Results from an exploratory study to identify the factors that contribute to success for UK medical device small- and medium-sized enterprises

This paper reports the results from an exploratory study that sets out to identify and compare the strategic approaches and patterns of business practice employed by 14 UK small- and medium-sized enterprises to achieve success in the medical device sector of the health-care industry. An interview-based survey was used to construct individual case studies of the medical device technology (MDT) companies. A cross-case analysis was performed to search for patterns and themes that cut across these individual cases. Exploratory results revealed the heterogeneity of MDT companies and the distinctive features of the MDT innovation process that emphasize the importance of a strategic approach for achieving milestones in the product development and exploitation process and for creating value for the company and its stakeholders. Recognizing the heterogeneity of MDT companies, these exploratory findings call for further investigation to understand better the influence of components of the MDT innovation process on the commercialization life cycle and value trajectory. This is required to assist start-up or spin-out MDT companies in the UK and worldwide to navigate the critical transitions that determine access to financial and consumer markets and enhance the potential to build a successful business. This will be important not only for bioscience-based companies but also for engineering-based companies aiming to convert their activities into medical devices and the health- and social-care market.     

An integrated intelligent process planning system for prismatic parts using PC-based CAD and CAM software packages

Traditional machining process planning relies heavily on human decision making and manual calculations. The utilisation of CAM software and computers to aid machining reduces errors and planning time. A fully integrated planning system using CAD and CAM software would further increase the efficiency of process planning. The goal of this research is the automation of machining process planning for prismatic parts by integrating Autocad and Mastercam software packages using the Autolisp programming language and artificial intelligence techniques. Using only a 3D representation of the prismatic part geometry drawn in Autocad as input, the integrated system will be capable of producing NC code for the machining of the part with minimal human intervention. This system would greatly enhance the productivity of machining process planning.     

Product design reuse with parts libraries and an engineering semantic web for small- and medium-sized manufacturing enterprises

The design reuse of products is vital for mass customization. In small- and medium-sized manufacturing enterprises (SMMEs), employing design reuse is a challenging issue because of the limited level and scale of these enterprises. Previous studies have not considered this issue and have attempted to rebuild a complete novel system. In this study, we propose a design reuse approach based on an engineering semantic web (ESW) and implement a design reuse system. This system does not rebuild the current parts library in SMMEs. In our approach, we construct an ESW and a mapping relation to introduce engineering semantic information into the existing parts library. In addition, we employ ant colony optimization (ACO) for the retrieval of design information. A design reuse prototype system is implemented for solving the problem of design reuse in SMMEs.     

基于Mastercam软件CAD/CAM功能的应用研究

在机械生产和教学过程中,Mastercam软件都发挥了巨大的作用。简单的介绍了Mastercam的CAD/CAM功能,并结合实际的零件设计和加工介绍了Mastercam的不同使用方法。     

基于CAD/CAM软件在注塑模具设计以及加工编程中的应用研究

阐述了三维设计软件Cimatron在注塑模具设计过程中分模技术的重要应用,以及主要零件在加工中心计算机数控编程中的加工介绍.     

商品化CAD/CAM软件反向工程功能评述

根据反向几何设计的要求 ,从数据点处理、曲线和曲面的拟合、编辑及质量评价、加工及工程分析等方面 ,比较和评价了商品化CAD/CAM软件的反向工程功能 ,展望了软件反向设计技术的发展方向。     

基于 UG软件 CAD/ CAM功能的应用研究

在注塑模的辅助结构设计、辅助工程分析和辅助形体加工全过程中，UG软件都可发挥巨大的作用。这种作用既贯彻了整体化、系统化、智能化的设计理念，又贯彻了精确性、快速性、有效性的加工规范，可以大为提高注塑模的设计水平和加工质量，应当推广和普及。