查询词典 CAD

By the analysis of the characteristic and restriction of the gear components ,this paper upbuilds the characteristic model based on the restriction and actualizes data transmission and information sharing among CAD.CAE and CAPP .This paper analyzes the general principle of parameter determination and strength check about gear and researches the algorithmic of gear strength check based on the characteristic .This paper introduces expert knowledge into respective procedure of CAD.CAE and CAPP and actualizes the intellectualization in design process .strength analysis and process planning .

以齿轮类零件作为研究对象，在分析了其特征及约束的基础上，利用数据库技术和图形单元建模技术，建立了基于约束的特征模型，实现了CAD／CAE／CAPP之间的数据传输和信息共享；分析了齿轮参数确定、强度校核的一般原则，进行基于特征的齿轮强度校核的算法研究；将专家知识融入在CAD、CAE、CAPP各个过程中实现了设计过程、强度分析和工艺分析的智能化。

In order to assurance the maching accuracy and surface quality of steam turbine blades,based on typical CAD/CAM software Pro/Engineer 2.0,the flow diagram of parametric modeling and maching of turbine blades is drawn;The 3-D entity model of Steam Turbine Blade is upbuilt by parametric modeling method,and the fit-method with NURBS is extracted to smooth the curve surface,and the matrix expression of NURBS is deduced to make the surface more accurate;Then based on it's CAD model,the maching technology process...

为保证汽轮机叶片的加工精度和表面质量，以典型的CAD/CAM软件Pro /Engineer Widefire2.0中文版为基础，绘制了汽轮机叶片参数化设计加工的流程图；用参数化建模方法建立了叶片的三维实体模型，提出用NURBS曲线拟合方法进行光顺处理，并推导出NURBS的矩阵表达式便于截面型线的拟合，进而使叶片的造型更加精确；在CAD模型的基础上，分析了叶片的加工工艺流程，并用软件的CAM功能对叶片进行数控加工仿真，生成了NC代码。

ABSTRACT In order to improve the degree of intelligence in press die design CAD system, this dissertation offers the systematic and deep-going research on the architecture and intelligent design methods for press die CAD.

本论文以提高冲模CAD系统的智能化为目的，对冲模CAD系统的体系结构和智能设计方法进行了系统、深入的研究。

Intelligent CAD module came true to be exchanged with AutoCAD data, the option that covers the data that checks module of; intelligence CAM to use CAD module to arise the design that can have a figure and scale, automatically to have cutting tool and method plan, generate a knife file, generate numerical control code then, the explanation that the system still accuses code through logarithm is compiled undertake orbit is emulated, make manufacturing implementation compositive change, intelligence is changed, automation.

智能CAD模块实现了和AutoCAD数据交换，可以进行图形的设计和绘制、自动套裁；智能CAM模块利用CAD模块产生的数据进行刀具的选择和路径规划，生成刀位文件，进而生成数控代码，系统还通过对数控代码的解释编译进行轨迹仿真，使生产实现集成化、智能化、自动化。

NET and three dimensional CAD software SolidWorks2004, the special-purpose three plungers reciprocating pump CAD system collecting the design, the lectotype, the analysis and the plot as a body is developed in this paper.

NET和三维CAD软件SolidWorks2004开发出一套集设计、选型、分析及绘图为一体的专用三柱塞往复泵的CAD系统。

The introduction of international advanced CAD / CAE / CAM technology system with a CAD / CAM graphics workstations, plotters.

引进了国际先进的CAD/CAE/CAM技术体系，拥有CAD/CAM图形工作站、绘图机。

The authors analyzed the similarities and dissimilarities of data quantity, dimensions mark and cutting off of all kind of line type on CAD digital map, discussed the transferring methods with digital topographic map and CAD technique, automatic cutting profile and engineering quantity fast calculation with Visual Lisp were expounded here, too.

分析了在CAD绘制的数字地图中，常用的各种线型的数据量、尺寸标注、可切断性等异同点，论述了如何利用数字地形图和CAD技术对其进行转换，并用Visual Lisp编程自动切剖面，计算工程量。

The CAD/CAM process of the handle part was implemented, including constructing 3D entity modeler, creating tool path, computer simulating, postprocessing cutter location files into tape files for a specific machine tool, transferring machining information of the handle part by the Network-based CAD/CAM Prototype System, NC machining of the handle part at last.

利用网络化CAD/CAM原型系统实现手柄零件CAD/CAM过程，包括手柄三维实体造型、刀位轨迹生成、计算机仿真检验，后置处理生成特定机床的G代码，通过网络传输手柄零件加工信息，最后完成手柄零件的数控加工。

This dissertation introduces the status quo of structured cabling technology and the application of CAD technology in the field of structured cabling, describes the shop drawing design contents of structured cabling subsystem, introduces the application status quo of optimization algorithm in CAD shop drawing of structured cabling system.

首先，本文对结构化布线技术的发展状况和CAD技术在结构化布线行业的应用情况进行了介绍，对结构化布线系统施工图中各布线子系统的设计进行了阐述，对最优化方法应用于结构化布线系统CAD施工图的应用情况进行了说明。

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。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失