查询词典 cad cam

A study on the CAD/CAM system assembler of the intelligent development platform of press dies CAD/CAM system

在分析传统的冲模 CAD系统体系结构的基础上，提出一种冲模 CAD系统的层次式体系结构及其开发平台的体系结构。

Based on CAD/CAM/CAE software——I DEAS Master Series,the standard feature library suitable to accumulator type unit injector is built up.A research on its variable structure,parametric design and 3 dimensional structure FEA is carried on with advanced CAD/CAE technique.It ensures the successful design of accumulator type unit injector.

本文基于大型CAD／CAM／CAE软件I－DEASMasterSeries，采用先进的CAD／CAE技术，建立了适于蓄压式泵喷嘴的标准特征库，对其进行变结构、参数化设计及3维有限元结构计算研究，为蓄压式泵喷嘴结构的设计成功提供了可靠的保证。

Are powerful but expensive unexceptionally. And the independent systems of CAD and CAM are often adopted in most of the enterprises, whose obvious weakness is that the automatic information communication among the systems cannot be realized.

具有CAD/CAM集成功能的大型软件如UG、ProE等，功能强大，但价格昂贵，国内企业普遍采用的CAD和CAM软件大多是独立的系统，不能实现系统之间信息的自动传递和转换。

The CAD/CAM data integration of the real part and the adjusting of the CNC program are complished.

本文的研究实例在CAD、CAE、CAM三个环节均进行了有效集成，这种分析研究手段将有力地推动注塑模CAE的工程应用和CAD/CAE/CAM技术的广泛应用。

An integrated CAD/CAM software system developed by the CAD centerof Tsinghua University and some other institutions is presented. The systems con sists of six modules,namely user interface, interactive drafting, product modeling,analysis and optimization, NC Machining, and database management.

基于STEP的集成化CAD／CAM支撑软件系统孙家广，杨长贵（清华大学计算机科学与技术系北京100084）周济（华中理工大学机械学院武汉430074）顾元宪（大连理工大学力学研究所大连116024）摘要本文介绍了由清华大学CAD中心等单位开发的集成化CAD／CAM支撑软件系统。

Main points of the thesis are as follows:(1) The main function models and information relations between these models in the CAPP system in the integrated CAD/CAM project are explained, a new process plan design method is mentioned based on analyses of process plan design. This method is based on the process plan prototype, and develops the prototype little by little until the perfect process plan is completed, the prospect of this method is discussed;(2) The feature abstracting rules and methods are studied, a feature coding system is developed based on GT, all the defined feature models are described by the mathematical methods;(3) The integrated method of CAD/CAPP based on features is mentioned, this method defines a feature exchanging model, and develops an interface software to exchange design data into technology data base, this technology data base includes the design and technology information of the parts;(4) The process plan reasoning method based on features is created, this method uses Mycin algorithm to solve the reasoning of the feature process plan. A process plan making system is developed. In this system part process plan is made by the semi-intelligent method, this method uses the feature reasoning, feature process chain searching and man-computer talking together;(5) The main structure of the HOPE system is introduced, a shaft drawing and its process plan made by this system are shown, the data process problem in process drawing making is also discussed;(6) A new method of describing process rule is introduced, this method uses IfThen rules and neural nets weight values together to describe process rules, the BP algorithm is adopted in this method;(7) The optimal machining sequence problem of the process steps on the same fixturing is discussed, optimal algorithms SA is applied to solve this problem, the result shows that this method is more efficient than the traditional method;(8) All jobs in the thesis are summarized. In order to carry out the research in the future, some rational proposals are given.

全文论述的内容主要有下列几个方面：(1)较为系统地阐述了CAD／CAM一体化工程项目中CAPP系统的主要功能模块及其信息流程，在分析工艺设计过程的基础上，提出了基于特征原型的渐进式工艺设计方法，并探讨了该方法的应用前景；(2)研究了零件特征提取的原则和方法，在成组技术的基础上，开发了一套基于特征的分类编码系统，并在提取零件特征的基础上，定义了零件特征的数据模型，开发了基于轴类零件特征的参数化设计系统；(3)研究了基于特征的CAD／CAPP集成的方法，通过定义零件特征数据模型的存储结构，开发了将设计数据转换到工艺数据库中的接口程序，为后续的CAPP系统提供必要的零件形状和工艺信息；(4)研究了基于特征的工艺推理方法，将Mycin算法应用到工艺决策中，开发了基于特征的工艺推理及工艺方案生成系统，在系统中综合运用特征推理、特征加工工艺链查询及人机对话相结合的半智能化方法确定零件加工工艺；(5)介绍了整个HOPE系统的总体结构，通过运行HOPE系统绘出了一轴类零件的零件图，并生成了该零件的加工工艺方案，初步探讨了基于特征的工序图生成技术中数据处理问题；(6)研究了工艺设计过程中知识如何有效表示的问题，提出了将显式的IF-THEN规则表示与隐式神经网络权值表示相结合的工艺知识表示方法，并利用BP算法进行了工艺知识表示的初步研究；(7)研究了工艺设计过程中同一安装下工步优化排序问题，利用神经网络中基于模拟退火的理论来解决该工步优化排序问题，实践证明该方法较传统的算法具有更高的效率；(8)总结了本文所进行的研究工作，为今后进一步开展工作提出了较为合理的建议。

The integration of Web and CAD/CAM technique, is the trend of CAD/CAM system.

将Web技术和CAD／CAM技术相结合，是CAD／CAM系统发展的重要方向之一。

The challenge is a competition in which students aged between 11 and 18 from schools, colleges and youth groups use CAD/CAM software to design, analyse, manufacture, test and race a miniature F1 car made from balsa wood and powered by CO2 cylinders.

目前的挑战是竞争中的学生，年龄介乎11日和18日从小学，中学和青年团体使用CAD / CAM软件的设计，分析，制造，测试和比赛一个缩影F1赛车从木材和巴尔萨采用二氧化碳气瓶。

With the progress of science and technology, CAD/CAM technologies are applied to the area of prosthodontics. It has greatly improved the quality and efficiency of dental restoration and sped up the technology revolution in dental industry.

随着科技的进步，CAD/CAM技术开始进入口腔修复学领域，从而使得口腔修复体制作的质量和效率大大提高，推动了牙科医学的革新。

Objective: The purpose of the study was to evaluate several kinds of restorations fabricated by Cerec2 CAD/ CAM system.

目的：采用Cerec2 CAD/CAM系统制作各类修复体，并对其近期临床效果进行评价。

However, as the name（read－only memory）implies, CD disks cannot be written onorchanged in any way.

然而，正如其名字所指出的那样，CD盘不能写，也不能用任何方式改变其内容。

Galvanizes steel pallet is mainly export which suits standard packing of European Union, the North America. galvanizes steel pallet is suitable to heavy rack. Pallet surface can design plate type, corrugated and the gap form, satisfies the different requirements.

镀锌钢托盘多用于出口，替代木托盘，免薰蒸，符合欧盟、北美各国对出口货物包装材料的法令要求；喷涂钢托盘适用于重载上货架之用，托盘表面根据需要制作成平板状、波纹状及间隔形式，满足不同的使用要求。