基于CATIA定位销的参数化设计

本设计属于自身独立完成并顺利完成答辩，具有很高的可靠性，绝对不弄虚作假，设计内容真实可靠，内含设计说明书、图纸、动画演示等，需要图纸和设计详细电子档的加QQ：3103064563，旨在共同进步，寻求共同提高！！！！基于CATIA定位销的参数化设计毕业设计论文题目基于CATIA定位销的参数化设计姓名0000000学号11530082院系经济技术学院专业机械设计制造及其自动化指导教师000000职称教授中国·合肥二o一五年六月目录摘要·································1第一章绪论····································································································21.1课题研究背景及意义···········································································21.2CAD/CAM的介绍···················································································21.3CATIA简介···························································································3第二章参数化设计·······················································································42.1参数化设计简介··················································································42.2参数化设计方法··················································································42.3参数化设计思路··················································································42.4定位销参数化建模及其实现方法······················································42.5利用系统参数与尺寸约束驱动定位销零件图··································5第三章定位销参数化建模··········································································63.1技术条件······························································································63.2固定式定位销工程图及参数······························································63.3固定式定位销参数化建模··································································7第四章零件库的建立·················································································144.1功能模块介绍····················································································144.2定位销零件库的建立········································································144.3定位销零件库总览·············································································15第五章定位销的简单应用········································································215.1应用简介·····························································································215.2应用装配简介·····················································································215.2.1固定式定位销组合·········································································215.2.2可换式定位销与定位衬套组合························································225.2.3定位插销与定位衬套组合·······························································23结论·························24致谢·············································································································25参考文献··································································································26CATIA参数化设计第1页共27页基于CATIA定位销的参数化设计作者：00000指导老师：00000000000机械设计制造及其自动化合肥230036摘要：定位销在汽车、发动机、离合器、摩托车、连杆等诸多生产制造行业中都有十分重要的应用，它在其中的主要作用就是限制各零件的自由运动度，在两部分或更多部分构成的模具中，使模具相邻两部分确定位置。针对标准件其标准化、系列化以及通用化的特点，为了减少标准件的重复设计，缩短标准件的整个开发周期，方便标准件数据的管理，就必须对产品进行参数化设计。利用CATIA对定位销进行参数化设计，设计人员只需要输入一些必要的参数，系统就可以在极短的时间内自动生产优化的变型设计结果，这样可以很大程度上提高设计效率，方便定位销数据的管理，设计出更多的产品。文章通过对定位销的建模、参数化设计以及零件库的建立，详细阐述了设计思路和设计方法。关键词：定位销；CATIA；参数化设计；零件库CATIA参数化设计第2页共27页第一章绪论1.1课题研究背景及意义机械制造行业是属于第三产业，是国民经济的基础产业，同时是国民经济发展的支柱产业，工艺装备则是机械制造系统中的一个重要组成部分，其在国民经济中有着举足轻重的作用。在不断发展的世界经济条件下，机械制造也蓬勃发展，出现了机械制造行业竞争的全球化，为了提高机械制造的效率以及缩减机械制造的成本，现在生产要求企业所制造的产品更新换代的速度越来越快，传统的大批量生产模式在逐渐被中、小批生产模式所取代。据国际生产研究协会的统计结果表明，面前中、小批量多品种生产的工件品种已占工件种类总数的85%左右。另一方面，根据有关资料统计，我国现有工业水平，生产准备周期一般要占真个产品研制周期的50%-70%，其中工艺装备的准备阶段中有70%-80%的时间用于夹具的设计和制造。可见夹具设计与制造对于产品的开发周期、产品上市时间有重大影响。为了适应多品种、中、小批量生产模式对夹具快速设计的需求，越来越多的机械制造企业摒弃传统夹具设计方法而采用机床专用夹具。机床夹具是为加工某一零件的某一道工序而特意设计，具有刚性好、操作方便、结构紧凑、应用面广、使用量大等优点。由于机床专用夹具可以达到生产批量要求，他将成为机械制造生产企业赢得市场和提高生产率的主要途径。传统的机床专用夹具设计是以经验依据的设计方法，需要经验丰富的夹具设计人员来完成，劳动量大，设计时间长，修改不易，越来越不适应市场需求。同时，根据统计可知超过70%的夹具设计都来源于对现有的相似夹具的改造。机床专用夹具的设计也不例外。而一些大型三维CAD软件如UG、Pro/E、Soildworks等均未提供专用的夹具设计模块。为此，很有必要利用CAD软件开发出快速、准确绘制、装配和管理参数化机床专用夹具设计系统，以提高夹具设计效率和规范性，实现夹具设计经典适用，满足快速响应市场需求的目标，该项研究有利于企业获得良好的经济效益和社会效益。1.2CAD/CAM的介绍CAD/CAM技术是围绕产品的设计与制造相对独立发展起来的，在早期应用中，常常以独立的形式出现，并独立发挥作用。但在产品整个设计制造过程中，各个环节又是紧密相连的。经过多年的发展，CAD/CAM技术形成了一些具有环节针对性的单项技术，其中代表性技术有：CATIA参数化设计第3页共27页①计算机辅助绘图（computeraidedgraphics,CAG）;②计算机辅助工程分析（computeraidedengineering,CAE）;③计算机辅助工艺过程设计（computeraidedprocessplanning,CAPP）;④计算机辅助数控编程（numbercontrolprogramming,NCP）;⑤计算机虚拟制造（virtualmanufacturing,VM）。如果将每项技术作为独立的系统运行，一方面需要在各系统之间进行频繁的数据交换，另一方面还需要频地在各系统间进行切换。人们自然会想到将与产品设计制造的各环节相对应各个单项技术集成在一个大系统中，实现数据与功能的自动连接，这样可以大大提高效率。集成后的系统，输入的是产品的设计参数，输出的是控制数控设备动作的加工程序。这种集成多项功能的计算机辅助设计制造系统就是CAD/CAM集成系统[2]。1.3CATIA简介CATIAV5（ComputerAidedTri-dimensionIntegratedAnalysisV5）是法国达索公司（DassaultSystem)开发的基于WindowsNT/2000/XP操作系统的高端CAD/CAM/CAE软件，它涵盖了产品开发的全过程，提供了完善无缝的集成环境【3】。CAD/CAM/CAE技术在问世之后几十年里对各行各业的产品设计产生了极大的影响，尤其是进入21世纪以来，我国的汽车制造和航空工业的迅猛发展，功能强大的软件随处可见，其强大的功能可以使企业降低成本，缩小新产品开发的风险【4】。今天已经很难想象没有软件支持将如何设计像飞机、汽车这样复杂的产品。CATIA软件不仅是航空航天、汽车领域中市场占有率最高的CAD/CAM软件，在造船、建筑领域也得到了广泛的应用。一旦用户掌握了其参数化设计方法，建立自己的常用零件库，将会进一步提高设计的效率。法国达索公司推出的CATIAV5计算机辅助三维互动应用系统是高级计算机辅助设计、制造和分析软件，具有统一的用户界面、数据管理和应用程序接口，兼备了其他优秀软件的特点，广泛应用于航空航天、汽车、机械及电子设备等行业。庞大复杂的波音777飞机即是采用CATIA系统的杰作。面前国际上主流的汽车制造业和飞机制造业无一不采用CATIA作为其设计手段。CATIA系统的应用前景十分广泛。