关于ug毕业论文

你说的应该是自行车的改装设计类，你可以到“US机械毕业设计网”上面看看没有这方面的资料下载！

强烈建议自己写最好

模具毕业论文引言模具论文模具是一种技术密集、资金密集型产品，在我国国民经济巾的地位也非常重要。模具工业已被我国正式确定为基础产业，并在“十五”中列为重点扶持产业。由于新技术、新材料、新工艺的不断发展，促使模具技术不断进步，对人才的知识、能力、素质的要求也在不断提高。根据社会发展对模具专业学生的新要求以教学生的实际情况，探圳大学工程技术学院对99级模具设计方向学生的毕业设计的进行了较大的改节，并取得了较好的效果。2模具专业学生培养目标赣江学院模具设计与制造专业主要是从事注射模的设计与制造。为了明确本方向的培养目标，我们对江苏、浙江，特别是其周边地区模具企业进行了比较广泛的社会调查，调查结果表明，用人单位要求毕业生有较高的思想品质和道德修养，爱岗敬业和较好的与人协调共事能力，要求毕业生基础理论扎实，着重基本技能的掌握和再学习能力，要求毕业生熟练掌握外语，有一定的计算机软件应用和开发能力。根据调查结果分析，我们把模具专业人才培养的规格定位于：面向各类型企业，培养爱岗敬业，具备机械及各类模具设计与制造基础知识，具有较强的再学习能力和创造能力，能在模具生产第一线从事模具设计制造、技术开发、应用研究和经营销售的应用型工程技术和管理人才。据此把拓宽专业口径，课程体系合理，教学内容优化、实验研究能力强，社会适应面宽，作为本方向教学的基本指导思想，将模具设计理论、实践与及计算机应用融合为一体。3计算机技术在注射模中的应用领域塑料产品从设计到成型生产是一个十分复杂的过程，它包括塑料制品设计、模具结构设计、模具加工制造和塑件生产等几个工要方面。它需要产品设计师．模具设计师、模具加工工艺师及熟练操作工人协同努力来完成，它是一个设计、修改、再设计的反复迭代、不断优化的过程。传统的手工设计已越来越难以满足市场激烈竞争的需要。计算机技术的运用，正在各方面取代传统的手工设计方式，并取得了显著的经济效益。计算机技术在注射模中的应用主要表现在以下几个方面：(1)塑料制品的设计：基于特征的三维造型软件为设计者提供了方便的设计平台，而且制品的质量、体积等各种物理参数为后续的模具设计和分析打下了良妤的基础。(2)结构分析：利用有限元分析软件可以对制品的强度、应力等进行分析，改善制品的结构设计。(3)模具结构设计：根据塑料制品的形状、精度、大小、工艺要求和生产批量，模具设计软件会提供相应的设计步骤、参数选择．计算公式以及标准模架等，最后给出全套模几结构设计图。(4)模具开合模运动仿真：运用CAD技术可对模具开模、合模以及制品被推出的全过程进行仿真，从而检查出模具结构设计的不合理处，并及时更正，以减少修模时间。(5)注射过程数值分析：采用CAE方法可以模拟塑料熔体在模腔中的流动与保压过程，其结果对改进模具浇注系统及调整注塑工艺参数有着重要的指导意义，同时还可检验模具的刚度和强度、制品的翘曲性、模壁的冷却过程等。(6)数控加工：利用数控编程软件可模拟刀具在三维曲面上的实时加工过程并显示有关曲面的形状数据，同时还可自动生成数控线切割指令、曲面的三轴，五轴数控铣削刀具轨迹等。目前，国际上占主流地位的注射模CAD软件有Pro/E、I-DEAS、UGⅡ、SolidWorks等；结构分析软件有MSC、Analysis等；注射过程数值分析软件有MoldFlow等；数控加工软件有MasterCAM、Cimatron等。4模具专业毕业设计模式模具专业的学生要求综合知识和实践能力较强，它既是学生大学四年所学的机械制图、工程材料、公差配合与技术测量、塑料成型工艺与设备等技术基础课、专业课的综合应用，又需要学生了解大量的实践经验。通过毕业设计，应使学生在下述基本能力上得到培养和锻炼：①塑料制品的设计及成型工艺的选择；②一般塑料制品成型模具的设计能力；③塑料制品的质量分析及工艺改进、塑料模具结构改进设计的能力；④了解模具设计的常用商业软件以及同实际设计的结合，以往的毕业设计严格来说只能算是模具设计这门课的课程设计；老师指定一个塑料产品，有时甚至连产品模型图都交给学生，学生按照谍本上的模具设计步骤一步步做下去，由于没有实践经验，学校也不可能将学生的设计变成实际产品，因此，设计的合不合理，学生不知道，即使有经验的老师指不出不合理处，学生也没有感性认识，只能是纸上谈兵。学生踏人社会，从事实际产品设计，往往会发现无从下手，即使设计出来也是废纸一张，通常都要通过1到2年的时间才能入门。

Chapter 1. SolidWorks basis This chapter points With the PC, and the rapid development of CAD technology, in the past only in workstation environments, UNIX platform 3D design software applications, it is now the ordinary PC platform and the use of the Windows environment, become ordinary designers, engineers design tools. SolidWorks as a Windows environment of mechanical design software, has fully with the Windows user-friendly, simple operation of the characteristics of its powerful design features to satisfy the vast majority of mechanical product design needs. SolidWorks as a three-dimensional design software, a comprehensive parts and assembly modeling capabilities entities, and the model for analysis and processing, which automatically generate engineering drawings. In studying specific operations, it must first be correctly installed software to a computer, and then work with SolidWorks user interface, and by setting options to build a suitable working environment. This chapter includes: 3D design software outlined The main features of SolidWorks Installation and start SolidWorks SolidWorks user interface Set up the working environment of SolidWorks Summary of 3D design software CAD software category from the 20th century to the 1960s computer-aided geometric design was mainly to resolve the graphics on the computer display and describe the problem, then gradually raised wireframe, surface, geometric entities such as physical description model. Today, a total experienced the following stage.  computer graphics stages: focused on solving computer graphics, surface expression, and other basic issues.  technical parameters and characteristics of the stage: resolving CAD data control and modification.  intelligent design stages: in the design of integrating more engineering knowledge and rules, to achieve a higher level of the computer-aided design. After 40 years of development, 3D design software has been developed from a simple drawings or product model generation tools, development can provide a wide range of engineering support, covering design intent expression of design standardization, serialization, and design results of the analysis can be created, interfere with the inspection process of judgement, design optimization, and many other aspects. 3D design the model can be converted to support CAE (computer-aided engineering) and CAM (computer-aided manufacturing) applications data format. 3D design these features meet the needs of the project, which have greatly increased the quality of product development and efficiency, greatly reducing the product design and development cycle. At present, large-scale manufacturing enterprises at home and abroad, the 3-D design software has been widely used. American companies such as Boeing use 3D design and related software, in the two and a half years, achieving the 777 non-design drawings. According to the traditional design work, the whole process requires at least four years. The company also works in the implementation of the widely used parallel engineering technology, in the CAD environment with the overall product virtual assembly, the number of correct design errors, thus ensuring that the design process of the short cycle, the outcome of the high-quality design and manufacturing process the fluency. The extensive use of three-dimensional design software can be divided into high-end and mid-range CAD systems, the high-end 3D CAD software mainly I-DEAS, UG, Pro / ENgineeR, CATIA, mid-range 3D CAD system mainly SolidWorks, SolidEdges, MDT, Inventor, etc.. The general manufacturing enterprises, and the powerful features of SolidWorks to complete the general design task, and it is its ease of use and efficiency has also aroused the concern of more and more users. 3D design software experience from simple geometric model generation tools to technology to variable control of the product model, ultimately forming a complete enterprise digital process. 3D design software applications greatly enhance the efficiency of product design and development. Compared to 2D design (CAD), the biggest feature of the 3D design feature is the use of modeling techniques and the entire design process related technologies. 3D design software is not only a powerful modeling functions, but also provides a wide range of engineering support. Including a description of the design intent, design and design reuse, such as serialization. 3D design into part design, assembly design and engineering drawings generated three stages. Related to the entire design process, makes any stage revised design will affect the other results of the design stage, thus maintaining the model in a variety of consistency in the design environment, thus improving design efficiency. Part Design Parts design is the basis of three-dimensional design. Parts are generally in the form of three-dimensional entities, as shown in Figure for loading vehicles in the "bucket" model of spare parts. Parts entities from the point of view of modeling, parametric feature-based modeling and 3-D design has become a mainstream technology. In different parts of the processing entity known as the characteristics of different combinations of features on the formation of a three-dimensional solid model parts. Not only has the characteristics of the corresponding projects, but also through the topological relations between the characteristics and timing relations can be flexible control of modeling results. Parts of the three-dimensional solid model, in the design and manufacturing process to achieve the following features.  generate engineering drawings parts.  parts of the stress analysis and strength check.  formed assembly, test the reasonableness of the design.  formation of mold parts.  generated NC code, direct machining. Figure loader "bucket" model parts assembly design 3D design software assembly is the basic function of one. Figure shows the toys "loader" assembly model. In modern design, can make use of the existing three-dimensional model parts will be two or more parts in accordance with certain constraints relationship assembly, formation of virtual product assembly; also can be used to project more in line with the top-down assembly design approach , in the assembly environment, in reference to other parts of the assembly of the location and size of the design of the new parts and assembly. At the same time, the assembly has been expanded to more engineering fields, such as motion analysis, interference checking, etc.. 3D design software product assembly environment has become the basis for comprehensive performance verification environment. The use of virtual product assembly model, the following functions can be realized.  a product of the true effect maps, verify that the product structure, analysis and design.  products generated view of the explosion.  the product movement analysis and dynamic simulation depicts moving parts specific point trajectory.  the real effect of the product plans for the "conceptual design products."  products generated simulation animation, presentation products assembly process. Figure toys "loader" assembly model Engineering Graphics Generation Use of parts and assembly solid model can be automatically generated assembly of parts and 2D engineering drawings. And compared to traditional CAD, 3D design software engineering drawings generated much simpler to operate, only specified model projection direction, insert size, and then details can be set up engineering drawings. Figure shows the SolidWorks automatically generated as shown in Figure and the "bucket" parts of the corresponding engineering drawings. Figure "bucket" Engineering Graphics SolidWorks features SolidWorks is a Windows environment of 3D mechanical design software, it has the following characteristics. 1. Simple, easy to learn and use  simple interface to facilitate the work.  full support for Windows drag copying, and mobile technology for the characteristics of the shear, copy, paste and other operations.  use SolidWorks help system can quickly grasp design method.  localization using core, the whole Chinese language interface. 2. Clear intuitive dynamic interface  dynamic tagging using different colours, and the parameters of the current operation remind designers objects can be marked so that designers are able to set in the graphics features of the relevant parameters; mouse confirmed and rich quick menu design makes very easy parts ; characteristics of the establishment, regardless of what position the mouse pointer, and can be quickly set up a feature.  District dynamic graphics preview features make the design process can be easily clear look at the design reasonable.  pioneering features Manager will be able to record and process design of a tree FeatureManager design, enables designers can easily achieve management features of the management of spare parts and assembly and modification.  dynamic activation attributes Manager can be very easy to attribute the Show Manager, modify such an operation.  use of the property managers to reduce the dialog graphics, making the design more concise, crisp.  configuration management provides the establishment and revision of the form of parts or assembly operations. 3. Flexible sketching and inspection functions  sketching state and characteristics have tended to define clearly marked, allowing designers easily identify the current operating state.  sketching easy to use click - click or click - Drag draft drawn in two ways, in line with the general design habits.  make sketches in the process of dynamic feedback and reasoning can be automatically added geometric constraint conditions, the draft of the use of different colors to distinguish the definition of reality draft status.  can drag yuan draft plans to change graphics and numerical size and geometry.  drawing can be used for pipeline design or scan three-dimensional characteristics of the draft. 4. Powerful feature-based modeling of parts and assembly control  powerful solid modeling functions.  can easily achieve the dynamic characteristics and the draft revision.  function of the sheet metal-forming tools makes use of simple drag function can establish sheet metal parts used shape.  use Feature Palette window, simply drag characteristics can be set up quickly; management and use of the feature is very convenient.  use of spare parts and assembly configurations can be achieved not only the existing design, build enterprise portfolio, but also enables the design of products.  driven by Excel software components and configuration automatically generated assembly configuration.  use of the light assembly functions can be quickly and efficiently to deal with large-scale assembly.  can be animated and dynamic view of the assembly assembly movement.  achievable in the assembly of intelligent assembly, the assembly can also be dynamic interference checking and clearance testing, as well as static interference checking.  system provides both the bottom-up assembly, also provides top-down assembly method. This method allows engineers to assembly in the assembly in reference to the environment in other parts of the assembly of the location and size of the design of new parts, more in line with projects habits. 5. Dynamic model associated engineering drawings generation capabilities  use RapidDraft (Drawing) engineering drawings, engineering drawings and can be three-dimensional model of a separate operation, so as to speed up the operation of engineering drawings.  can always maintain a three-dimensional model with the view of the shape and size of the entire relationship.  3D model can be automatically generated view of the project.  flexible view of operations, can generate projection view and cross-section of local enlarged view. 6. Easy data exchange  through standard data formats and other CAD data exchange software.  provide diagnostic data input function, which allows users to input geometric entities in the implementation of simplified, model error, as well as re-established remove redundant topology.  to provide a free plug-in the form of the data interface can be easily with other 3D design software (such as Pro / ENGINEER, UG, MDT, SolidEdges, etc.) data exchange.  DWG / DXF file conversion wizard can be established by other software engineering graphics file conversion of engineering drawings into SolidWorks document.  3D model can be exported into standard data formats, engineering drawings can also be output as DWG / DXF file format. 7. Supported collaborative work  3D Meeting is based on Microsoft's NetMeeting technology developed specifically for SolidWorks design staff to work together to provide the environment. 3 D Meeting can be used through the network of real-time collaborative work.  support Web directory, design data can be stored in the folder, as in the local hard disk storage as easy. 8. Facilitate the development of expansion Provide a free, open, full-featured API interface development tools, according to the actual situation of Visual C + +, Visual Basic, VBA or other OLE development process secondary development of SolidWorks. 9. Support network exchange SolidWorks design with the new products can be released into the Internet, so that is not installed SolidWorks customers via a Web browser to view it very easy for the remote release of new products and exchanges. 10. Rich 3D performance means  SolidWorks provide animation features, AVI file can be generated.  SolidWorks through plug-in enables users to easily produce high-quality PhotoWorks rendering map, including a wealth of material and texture, user-definable lighting, reflection, transparency, and background settings. 11. Facilitate the engineering analysis SolidWorks has many plug-in, engineers can provide a wide range of engineering analysis tools, such as finite element method can be used for rapid stress, deformation, frequency, thermal efficiency, power, fatigue, and electromagnetic engineering analysis of a number of items of COSMOS / Works, Motion analysis of the agency Mechanical Dynamics, which can carry out the analysis of the heat FloWorks such as plug-ins can not only make use of SolidWorks 3D solid modeling, but also enables the software to become a powerful computer-aided engineering analysis tools. Installation and start SolidWorks For normal operation of SolidWorks, first of all computer systems should be checked whether or not the allocation of software and hardware to meet the requirements of SolidWorks, and the need to correct software from the installation CD-ROM into the computer. installation of the necessary hardware and software configurations SolidWorks 1. Hardware requirements SolidWorks normal operation of the necessary hardware configuration as shown in Table . Table SolidWorks hardware requirements Minimum recommended hardware best CPU Pentium 266MHz Pentium Ⅱ, 450 MHz or higher Pentium Ⅱ, 600 MHz or higher 128MB 256MB 512MB memory 32MB or more memory cards, 3D Graphics Accelerator No less than 500 MB of hard disk 8x drive over 2. Software requirements SolidWorks software environment for the requirements of the Microsoft Windows 2000 / Me / NT4/XP At the same time, demand has been correctly installed Microsoft Internt Explorer (version or above) and Microsoft Excel (97 or later). installation process SolidWorks SolidWorks installation, the installation simply SolidWorks Add CD-ROM drive, and then click the Setup Wizard can be notified. Specific installation process is as follows. (1) Add the installation CD-ROM drive, the installation program will automatically run, and pop-up shown in Figure installation interface. Click on the installation of SolidWorks [] button, you can enter the main SolidWorks installation procedures. Figure installation interface (2) entered the Setup Wizard, as shown in Figure , click [next] button, following the installation. Figure installation wizard (3) choose to install options, as shown in Figure . Shall, in accordance with the optional modules to choose, pay attention to the different modules have different sequences of the corresponding serial number on the box in the CD-ROM. Next click [options] button. (4) The objective of the process to choose an installation folder. Installation of the default C: \ Program Files \ SolidWorks directory, as shown in Figure . For changes, click [changes] button, the pop-up dialog box to choose. Then, click [next] button. Figure choose to install options Figure Select the target folder (5) Establishment of dimensioning standards. SolidWorks 2004 has provided GB and ISO standards, in accordance with the need for choice. General should be chosen in line with China's basic national standards for GB as a standard-size standards, the default choice system units, the general choice [MMGSC (mm grams seconds)] default units, as shown in Figure . (6) to choose whether or not to provide software and the use of performance information to the SolidWorks Corporation. If the user's computer can access the Internet, you can choose [yes, I would like to recommend participation - radio button, as shown in Figure . Figure Select dimensioning standards and the system default units Figure to choose whether or not to participate in the Customer Experience Feedback Scheme (7) make early preparations for the installation, the system will begin installation. Just click dialog box shown in Figure of the [installation] button. (8) The installation will begin in accordance with the procedures specified path installation, as shown in Figure . Completed installation interface will be shown in Figure , click the button [completed]. Chart start the installation process in Figure install the user interface Chart completion of the user interface at the time of installation SolidWorks correct installation, it will automatically start the Windows system [] | [procedure] Add SolidWorks 2004 menu group, and displayed on the desktop icon fast SolidWorks 2004. the start SolidWorks And other Windows applications like SolidWorks also launched a number of ways, the simplest way is to start at Double-click the desktop icon fast SolidWorks 2003. SolidWorks user interface SolidWorks specifically for the Windows environment is the development of applications, so its user interface and other Windows applications are very similar, for example, also includes commonly used copy, paste, and other orders and the corresponding shortcut. SolidWorks user interface including the title bar, menu bar, toolbar, status bar, as well as the work area, the work area is divided into zones controlled areas and mapping of two parts, as shown in Figure .

基于ug玩具壳设计的毕业论文

结论UG是是一个交互式CAD/CAM(计算机辅助设计与计算机辅助制造)系统，它功能强大，可以轻松实现各种复杂实体及造型的建构。UG的主要功能是工业设计和风格造型、产品设计仿真、确认和优化、NC加工、模具设计、开发解决方案。通过这次的毕业设计，对UG的几个板块更加的熟悉。对一套模具的研发以及之后的加工工作有更进一步的了解。通过自学了解模具的基本知识，可以对所建模型进行简单的手工分模，最后进行的UG编程模拟加工。通过这次的毕业设计，还对UG的逆向设计中的光栅造型能够比较熟练的掌握，知道了TOP-DOWN自顶向下设计原理。总之，通过这次的毕业设计我收获了很多，在整个设计中我懂得了许多东西，也培养了我独立工作的能力，树立了自己的信心，相信会对今后的学习工作生活有非常重要的影响。

第一章绪论第一章绪论选题依据模具在产品制造过程中占据重要地位。模具设计水平的高低，在很大程度上决定了生产率的高低。有效的模具设计可以降低资源调整次数和调整时间，为生产计划与调度提供更大的优化空间，以达到提高生产效率的目的[1]。模具设计是工装系统的重要组成部分，它影响着产品生产的效率和质量。对模具设计进行深入的研究有着重要意义。模具行业是工业的基础行业，工业的各个领域都广泛地使用模具[2l。在电子、汽车、电机、电器、仪器、仪表、家电和通讯等产品中，60%一8%0的零部件都要依靠模具成形。用模具生产零件所表现出来的高精度、高复杂程度、高一致性、高生产率和低消耗，是其他加工制造方法所不能比拟的。模具又是“效益放大器”，用模具生产的最终产品的价值，往往是模具自身价值的几十倍、上百倍。模具生产技术水平的高低，在很大程度上决定着产品的质量、效益和新产品的开发能力，并且己成为衡量一个国家产品制造水平高低的重要标志[3]。模具作为工业生产的基础工艺装备，在国民经济中占有重要的地位。近10年来，模具CAD技术发展很快，应用范围日益扩大。模具CAD技术给模具的设计和制造提供了一个高效、经济而且快速的方法，大幅度地提高了模具的质量，缩短了模具的设计和制造周期，降低了模具成本[’]。目前国内外己经有许多模具CAD系统，这些系统虽然具有较强的分析计算能力与图形处理能力，可以提供交互式设计5]l。但是在这些系统中，模具设计过程主要采用人机交互方式进行，大多数的设计是依靠操作者的设计经验，计算机只是进行一些规则匹配以及计算工作，而对于前人成功设计的模具不能有效的利用，造成模具设计周期很长，成本较高，开发效率很低。基于实例推理技术(Case一basdeReasoning，CBR)的模具设计可以使设计者利用以往的设计经验，通过组合、修改以往的设计方案来构造新的设计方案;同时在现实生产中，己积累有许多模具零件的类型以及装配关系完全相同的模具族，可以成为新设计的基础6]I。cRB技术抛弃了以往对抽象的知识规则的构建和演算操作，直接借助己有实例来解决问题，通过对旧实例的证实和修正来达到对新模具的设计[7]。在基于实例推理系统中，以前的经验是以实例的形式按照某种组织结构保存于实例库中8]t，当要解决一个新问题时，通过相关属性采用适当的算法检索实例库，找出与新问题最相似的一个或几个实例，再修改实例来达到对新问题的解决[9l。在模具设计中应用CRB方法，利用计算机模具人脑在设计中的思维活动，完成了以往由设计师完成的任务，不仅充分利用了模具专家的设计经验，适合工程中的实际情况，也符合人类的思维习惯。同时，用这种方法得到的模具基于以前已经设计成功的实例，因此减少了新模具不能正常工作的可能性，并且缩短了开发周期。模具CAD发展现状和趋势模具CA。系统国内外发展概况模具CAD系统是随着以D技术以及现代设计理论与方法的发展而不断发展的，从最初的以二维图形技术为基础的系统发展到了目前以三维图形技术及特征构型为主要特点的阶段110，川。国外于20世纪60年代末开始模具以D研究，70年代初已投入生产中使用。如美国Diecomp公司于1973年研制成功计算机辅助设计级进模的PDDc系统[’21。该系统中已经包括产品图形与材料特性的输入:在输入的基础上，再进行模具结构类型选择，凹模排样、凸模和其他嵌件设计;最后绘制模具总装图和零件图以及NC编程。 1978年，日本机械工程实验室研制成冲裁级进模CAD系统，该系统由产品图输入、模具类型选择、毛坯排样、条料排样、凹模布置、工艺计算、绘图等10个模块组成。进入20世纪80年代随着计算机技术的发展，使用模具CAD技术的厂家大大增加。在弯曲成型级进模和汽车覆盖件模具CAD系统中，应用了塑性成形模拟技术。代表是日本日立公司于1982年研制成弯曲级进模以D/以M系统，采用人工与计算机设计相结合的批处理方式。 20世纪90年代出现了许多商品化CAD/CAM系统如Pro/E，SolidWorks等。由于我国计算机技术发展较晚，20世纪80年代才开始模具CAD研究。华中科技大学、机电研究院、上海交通大学等单位相继展开冲裁模系统的研究。20世纪90年代中期，华中科技大学的基于特征的设计的级进模CAD系统是这个时期的代表产口口口。模具CAO的发展趋势近年来，全球制造业正向亚太地区转移，我国正成为世界制造业的重要基地 [3]l。制造业模式的变化，必将产生对新技术的需求，也必将推动CAD技术的发展; 网络技术应用的普及将在更大程度上改变我们的生活，改变制造业的模式。随着我国加入WTO，要求我们的产品要有创新性，并且具有更高的质量、更低的成本，并在更快的时间内提供给用户[4l1。作为产品制造的重要工艺装备，国民经济的基础工业之一的模具工业将直面竞争的第一线。模具工业除需要“高技艺”的从业人员外，还需要更多的“高技术”来保证。 (1)协同创新设计将成为模具设计的主要方向制造业垂直整合的模式使得世界范围内产品销售、产品设计、产品生产和模具制造分工更明确。为了缩短产品上市周期，使模具设计充分理解产品设计的意图，在产品的设计阶段，模具设计也同时开始，产品设计工程师和模具设计工程师需尽早进入协同设计状态。另外，模具制造商需要的模具标准件一般都由模具标准件厂提供，最好在模具设计阶段就参照各类标准，充分利用模具标准件厂提供的数据进行设计。由于在制造流程中各个环节所采用的CAD系统不一定相同，这就要求以D系统要具备协同的能力，能够随时交换上下游的数据，能够处理彼此的数据，数据产生及处理标准化。目前，模具制造商己经较广泛地采用数控加工技术。为了保证加工质量、提高加工效率、改进制造流程，相当一部分的模具制造商开始使用多坐标数控加工、高速铣削加工以及基于快速原型的模具制造等方法。因为制造设备的丰富，制造信息的增加，今后的制造信息将不仅仅是数控编程加工的代码，更重要的是，从设计开始就考虑制造过程，即提供模具制造的工艺流程，其中不仅包含工艺表格、加工参数，还包括模具加工的夹具设计、加工的装夹过程及各工序的代码。各工序过程均进行仿真，并利用网络实现共享。 (2)模具CAD技术的ASP模式将成为发展方向今天的模具行业己经成为高技术密集的行业。任何一个企业，要掌握全部先进的技术，成本都将非常高昂，要培养并且留住掌握这些技术的人才也会非常困难。于是，模具CAD的APS模式就应运而生了，即由拥有各种专门技术的应用服务单位为模具企业提供技术服务。这样整个社会就形成了一个大的模具制造企业，按照价值链和制造流程分工，将制造资源最优发挥。应用服务包括如、快速原型制造、数控加工外包、模具设计、模具成型过程分析等。近20年来，由于不断采用新技术，制造模具已经远不是人们印象中的“手工作坊”了。模具CAO系统的特点和优越性 (1)模具设计的特点与传统的单个零件的设计不同，模具是多个零件的装配体，模具设计是一个极为复杂的过程，包括产品建模、工艺性分析、制定模具方案、选择模架、模具总装图设计、工作部件设计、辅助装置设计和零件详细设计等部分，要求最终能够生成总装图、部装图及模具零件图.模具造型的特殊性有以下几点: a.大多数模具是进行复杂零件加工的，模具造型较复杂。 b，一般模具加工零件的工序比较少，大部分是一次成型，所以模具的外形必须要有加工零件的所有细节描述。 C.模具设计的反复机率高，所以模具CAD几何模型应能反复更新并能及时修复。 (2)模具cAD的造型特点[4] 模具CAD造型技术是精确造型技术，可分为实体造型和曲面造型: a.实体造型技术对于结构简单的模具来说己经能够满足设计要求，但对于结构复杂、细节描述精度要求高的零件来说就显得不够，如在拔模面、面圆角过渡、型腔设计上受到了一定的限制。 b.曲面造型技术是由不同的曲面构造特征，产生光顺的曲面模型。主要包括多曲面的等变圆角过渡处理技术、曲面自动修剪技术、曲面编辑、曲面分析技术和光顺处理等核心技术，它能辅助实体造型技术完成模具设计中所有细节描述的设计。曲面造型技术适合于外形复杂和细节描述精度要求高的产品的模具设计。 (3)模具CAD的优越性[’“} 模具CAD的优越性赋予了它无限的生命力，使其得以迅速发展和广泛应用。无论是在提高生产率、改善质量方面，还是在降低成本、减轻劳动强度方面，以D 技术的优越性是传统的模具设计方法所不能比拟的。可提高模具设计质量。在计算机系统内存储了各有关专业的综合性的技术知识，为模具的设计和工艺的制定提供了科学的依据。计算机与设计人员交互作用，有利于发挥人一机各自的特长，使模具设计和制造工艺更加合理化。可以节省时间，提高生产率。设计计算和图样绘制的自动化大大缩短了设计时间。质量提高，可靠性增强，装修时间明显减少，模具的交货时间大大缩短。可以较大幅度地降低成本。计算机的高速运行和自动绘图大大节省了劳动力。优化设计带来了原材料的节省。技术将技术人员从繁冗的计算绘图中解放出来，从事其他创造性的劳动。论文的研究内容系统地提出基于实例推理的模具设计的理论与方法，对CRB技术在模具设计上的应用进行了深入的研究。在理论研究的基础上，开发了基于实例推理的模具设计系统，有力地证实了应用CRB技术可以提高模具设计效率。本文研究内容主要包括: 第一章绪论:概述了论文的研究意义，介绍了课题的来源与选题背景，简要的描述了CRB技术在模具设计中的应用，研究了模具CAD的国内外概况和发展趋势。第二章模具CAD系统总体设计:主要包括对模具CAD的流程分析，系统需求分析，以及体系结构的定制和功能模块的划分。第三章基于实例推理的关键技术:描述了基于实例推理技术，详细介绍了实例的表示，实例的检索策略以及实例的存储等一些关键技术。第四章基于实例的模具设计:介绍了模具实例的表示内容以及方法，并对模具实例的存储于检索提出了方案。第五章原型系统开发:介绍了UG开发平台和开发工具，对系统业务流程进行了描述。第六章结论与展望。对本文的研究内容进行总结和展望

哈哈，我这里有，但是收费的，收费的也进来吧，大家看有几个能提供免费毕业设计的。。。来到这里才知道什么叫做异想天开，蹭点分页不错哦@@

搞笑的我收费的有意就找我吧

毕业论文ug

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轴ug毕业论文

你说的应该是自行车的改装设计类，你可以到“US机械毕业设计网”上面看看没有这方面的资料下载！

1）零件图工艺分析该零件表面由圆柱、圆锥、顺圆弧、逆圆弧及螺纹等表面组成。其中多个直径尺寸有较严的尺寸精度和表面粗糙度等要求；球面Sφ50㎜的尺寸公差还兼有控制该球面形状（线轮廓）误差的作用。尺寸标注完整，轮廓描述清楚。零件材料为45钢，无热处理和硬度要求。通过上述分析，可采用以下几点工艺措施。 ①对图样上给定的几个精度要求较高的尺寸，因其公差数值较小，故编程时不必取平均值，而全部取其基本尺寸即可。 ②在轮廓曲线上，有三处为圆弧，其中两处为既过象限又改变进给方向的轮廓曲线，因此在加工时应进行机械间隙补偿，以保证轮廓曲线的准确性。 ③为便于装夹，坯件左端应预先车出夹持部分（双点画线部分），右端面也应先粗车出并钻好中心孔。毛坯选φ60㎜棒料。（2）选择设备根据被加工零件的外形和材料等条件，选用TND360数控车床。（3）确定零件的定位基准和装夹方式 ①定位基准确定坯料轴线和左端大端面（设计基准）为定位基准。 ②装夹方法左端采用三爪自定心卡盘定心夹紧，右端采用活动顶尖支承的装夹方式。（4）确定加工顺序及进给路线加工顺序按由粗到精、由近到远（由右到左）的原则确定。即先从右到左进行粗车（留㎜精车余量），然后从右到左进行精车，最后车削螺纹。 TND360数控车床具有粗车循环和车螺纹循环功能，只要正确使用编程指令，机床数控系统就会自动确定其进给路线，因此，该零件的粗车循环和车螺纹循环不需要人为确定其进给路线（但精车的进给路线需要人为确定）。该零件从右到左沿零件表面轮廓精车进给，如图2所示。图2 精车轮廓进给路线（5）刀具选择 ①选用φ5㎜中心钻钻削中心孔。 ②粗车及平端面选用900硬质合金右偏刀，为防止副后刀面与工件轮廓干涉（可用作图法检验），副偏角不宜太小，选κ=35 0。 ③精车选用900硬质合金右偏刀，车螺纹选用硬质合金600外螺纹车刀，刀尖圆弧半径应小于轮廓最小圆角半径，取rε=～㎜。将所选定的刀具参数填入数控加工刀具卡片中（见表1），以便编程和操作管理。表1 数控加工刀具卡片产品名称或代号 ××× 零件名称典型轴零件图号 ××× 序号刀具号刀具规格名称数量加工表面备注 1 T01 φ5中心钻 1 钻φ5 mm中心孔 2 T02 硬质合金90 0 外圆车刀 1 车端面及粗车轮廓右偏刀 2 T03 硬质合金90 0 外圆车刀 1 精车轮廓右偏刀 3 T04 硬质合金60 0 外螺纹车刀 1 车螺纹编制 ××× 审核 ××× 批准 ××× 共页第页（6）切削用量选择 ①背吃刀量的选择轮廓粗车循环时选a p =3 ㎜，精车a p =㎜；螺纹粗车时选a p = ㎜，逐刀减少，精车a p =㎜。 ②主轴转速的选择车直线和圆弧时，选粗车切削速度v c =90m/min、精车切削速度v c =120m/min，然后利用公式v c =πdn/1000计算主轴转速n（粗车直径D=60 ㎜，精车工件直径取平均值）：粗车500r/min、精车1200 r/min。车螺纹时，参照式（5-1）计算主轴转速n =320 r/min. ③进给速度的选择选择粗车、精车每转进给量，再根据加工的实际情况确定粗车每转进给量为㎜/r，精车每转进给量为㎜/r，最后根据公式v f = nf计算粗车、精车进给速度分别为200 ㎜ /min和180 ㎜/min。综合前面分析的各项内容，并将其填入表2所示的数控加工工艺卡片。此表是编制加工程序的主要依据和操作人员配合数控程序进行数控加工的指导性文件。主要内容包括：工步顺序、工步内容、各工步所用的刀具及切削用量等。表2 典型轴类零件数控加工工艺卡片单位名称 ××× 产品名称或代号零件名称零件图号 ××× 典型轴 ××× 工序号程序编号夹具名称使用设备车间 001 ××× 三爪卡盘和活动顶尖 TND360数控车床数控中心工步号工步内容刀具号刀具规格 / mm 主轴转速 / －1 进给速度 /mm. min －1 背吃刀量 / mm 备注 1 平端面 T02 25×25 500 手动 2 钻中心孔 T01 φ5 950 手动 3 粗车轮廓 T02 25×25 500 200

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