大锻件锻压工艺参数化的研究

探讨了大锻件锻压工艺参数化的意义,介绍了大锻件锻压工艺参数化推导方法和应用实例,包括节约材料的参数化、工艺质量控制的参数化和加热工艺规范编制的参数化。     

成组技术在汽车冲压模具设计中的应用

研究了成组技术在汽车冲压模具参数化设计中的运用,分析了汽车冲压模具参数化系统的设计过程.在UG平台上开发了汽车冲压模具参数化系统,实现了零件参数库、装配模型参数库和模型管理3个部分的功能,完成了汽车冲压模具的参数化设计.     

基于领域划分的逆向参数化建模

近年来,逆向工程中的参数化建模方法成为研究的重要方向。通过对目前应用比较广泛的基于曲面的逆向参数化建模和基于实体特征的逆向参数化建模的方法分别进行了分析,提出了基于领域划分的逆向参数化建模方法,并详细介绍了这种参数化建模方法的优势及其参数化建模的一般流程。以逆向参数化建模软件Geomagic Design X为平台,通过典型实例参数化建模及误差分析验证了该建模方法的优势,为逆向工程的参数化建模提供了一种更加有效、准确的建模方法。     

基于知识关联的产品装配参数化建模设计方法研究

概述了参数化设计的特点,分析了面向装配的参数化设计中的数据关联关系与自顶向下参数化建模,进一步研究了基于知识驱动的产品装配设计以及CATIA参数化建模功能与知识工程模块,最后结合典型的汽车覆盖件门板冲模模架实例,探讨了基于CATIA平台与CAA二次开发的三维装配体参数化设计与BOM表生成的工程实现方法。     

复杂空间曲面的参数化网格划分方法研究

根据参数化有限元分析的要求, 提出了参数化网格划分的思想, 并详细地叙述了参数化网格划分的方法和实现途径。针对汽车覆盖件这种复杂的三维曲面这一特例, 编写了参数化网格划分的程序。最后利用该程序对某汽车公司匹卡车的第一横梁和某汽车油杯进行了网格划分, 成功地实现了网格划分的参数化。     

APDL参数化分析在双丝焊接仿真中的应用

基于APDL参数化分析．设计了25号钢双丝焊接仿真的方法,包括有限元模型的参数化建立、焊接热源模型的参数化表示、热源移动的参数化实现、后处理模式的参数化方法：用该方法建立的APDL程序,只需输入材料及焊接参数,即可通过ANSYS分析获得与实际焊接相吻合的仿真结果。     

基于VS与Python的卧式金属挤压机参数化设计与分析

以VS为平台,结合SolidWorks软件的参数化和Abaqus的命令设计语言Python,通过关键点坐标获得对当前正在操作的有限元模型的相关信息,克服了传统以编号搜索加载边或面的参数化方式的缺陷.实现了对于复杂结构的模型参数化设计和模型结构发生明显变化的有限元参数化设计.同时,消除了重复对有限元软件进行操作的弊端,为灵活优化结构并实现参数化分析提供了便利.以此为基础开发了卧式金属挤压机参数化设计与分析平台,极大地缩短了设计分析周期,实现了卧式金属挤压机结构设计及优化分析的快速化.此外,这一方法对类似的机械构件的参数化设计分析也有一定的参考价值.     

CAD中的参数化设计技术研究

探讨了参数化设计实现的基本原理、方法和步骤。并例举了参数化设计的应用实例。解决了ＣＡＤ应用中参数化设计的部分关键技术。     

基于Pro/E环境单圆弧齿轮参数化设计的研究及应用

研究了Pro/E参数化设计功能,基于Program参数化设计方法,开发出单圆弧齿轮参数化设计模块,并结合具体的应用实例,展现了单圆弧齿轮三维实体模型的快速实现     

基于UG的参数化设计方法及程序设计技术

介绍了冲压模具中三维模型参数化设计方法,基于UG三维软件阐述了3种参数化设计方法及程序设计技术,并提供了设计实例。最后提出了3种参数化设计方法综合应用的设计思想。     

On a General Parameterization for Inverse Analysis of Heat Deposition Processes

A general parameterization for inverse analysis of heat deposition processes using incomplete or minimal experimental data is presented. This parameterization is considered general in the sense that it can be applied, in principle, to the inverse analysis of a wide range of different types of heat deposition processes, including welding. The structure of this parameterization follows from the concepts of model and data spaces that imply the existence of an optimal parametric representation for a given class of inverse problems. Accordingly, the corresponding optimal parametric representation lies in the model space and is determined by the characteristics of the available data sets spanning the data space and the nature of the data sampling for purposes of parameter determination via appropriate optimization techniques. The elements of the proof presented here provide an elucidation of certain aspects of inverse heat-deposition analysis that are important for practical application.     

Path-Weighted Diffusivity Functions for Parameterization of Heat Deposition Processes

General parameterizations are constructed for spatial modulation of heat diffusion patterns according to energy deposition characteristics occurring within a volume of material where there exist inhomogeneous or anisotropic thermal diffusivity. These parameterizations are formulated in terms of path-weighted diffusivity functions. The construction of a general parameterization of energy deposition processes where spatially dependent thermal diffusivity exists is necessary for their inverse analysis. The structure of such a parameterization follows from the concepts of model and data spaces that imply the existence of an optimal parametric representation for a given class of inverse problems. Accordingly, the optimal parametric representation is determined by the characteristics of the available data, which, in principle, can contain both experimental measurements and numerical simulation data. Parameterizations for spatial modulation of heat diffusion follow from the observation that many different types of energy deposition processes can be represented by weighted sums of basis functions whose general forms are that of spatially modulated diffusion. The parameterizations presented are constructed according to a specific definition of the inverse heat deposition problem that provides a rigorous foundation for a highly flexible and general parameterization of energy deposition processes, which is essential for their inverse analysis.     

基于ARX的孔结构参数化绘制的实现方法

在AutoCAD2000环境下,利用VC 6.0,开发了一个实现孔结构参数化绘制的ARX应用程序.论述了孔结构图像菜单的建立方法,并以圆柱通孔、圆柱盲孔和圆锥沉孔为例说明了孔结构参数化绘制的实现方法.给出了应用实例.     

基于SolidWorks斜齿轮二次开发技术的研究

文章论述了齿轮三维模型的用途，阐述了利用VB6．0作为开发工具，进行Solid Works二次开发的关键技术。详细论述借助于Solid Works API应用函数接口。实现渐开线高级曲线参数化在Solid Works软件上的实现过程以及控制斜齿轮特征扫描路径螺旋线的参数同斜齿轮参数的数学关系；同时推出斜齿轮端面齿形齿廓曲线组成发生变化时临界齿数的公式。最终建立斜齿轮的三维参数化模型，利用VB界面输入参数可以自动生成斜齿轮的三维模型。     

基于并行参数化设计技术在冲压模具设计中的应用

阐述了基于“国家863／CIMS主题”重大应用项目并行工程设计平台上，利用PRI／E三维全参数化设计系统，针对在产品开发及冲压模具设计、制造过程中通过全相关参数化设计技术，实现产品的并行设计及制造。     

基于Pro/E Wildfire 和VC++6.0的行星锥齿轮参数化设计

介绍了在Pro/E Wildfire环境下,运用笛卡儿坐标系创建渐开线齿廓并利用其开发工具参数(Parameters)结合关系式(Relations)功能来实现行星锥齿轮参数化造型的关键技术.利用高级编程语言VC 6.0和Pro/E Wildfire的二次开发工具Pro/Toolkit,通过动态连接库,成功地实现了行星锥齿轮参数化设计系统的二次开发.     

VB环境下应用Pro/E与AGW进行搓齿模具参数化设计

搓齿模具的设计质量和效率是精密冷滚轧技术中关键环节之一。本文介绍了在VB环境下应用Pro/E,AGW软件进行搓齿模具参数化设计及开发过程,简述了花键轴和搓齿模具参数化设计方法及其相互关系,并分析了花键轴成形过程及相关因素,对经过参数化设计得到的搓齿模具进行成形模拟,将工件成形后的渐开线花键轮廓齿形与理论渐开线花键轮廓齿形进行对比,验证了设计方法的可行性。为后续的设计分析、数字模拟仿真及产品系列化生产提供技术支持。     

基于Pro／ENGINEER的化工机器零件造型设计

针对化工机器零件的特征和设计中存在的问题，应用基于特征的参数化造型软件Pro／ENGINEER对零件进行参数化造型，对造型设计技术要点进行了探讨，通过叶轮特征建模实例，实现了基于Pro／ENGINEER的参数化特征设计，提高了设计效率。     

Spatial Modulation and Filtering of Diffusion Patterns for Inverse Analysis of Heat Deposition

General parameterizations are constructed for spatial modulation and filtering of heat diffusion patterns according to general energy deposition characteristics occurring within a volume of material resulting from a volumetrically coupled energy source. These parameterizations include previously constructed models of energy deposition as special cases. The construction of a general parameterization of energy deposition processes is necessary for their inverse analysis. The structure of such a parameterization follows from the concepts of model and data spaces that imply the existence of an optimal parametric representation for a given class of inverse problems. Accordingly, the optimal parametric representation is determined by the characteristics of the available data, which in principle can contain both experimental measurements and numerical simulation data. Parameterizations for spatial modulation and filtering of heat diffusion follow from the observation that many different types of energy deposition processes can be represented by weighted sums of basis functions whose general forms are that of spatially modulated or filtered diffusion. A significant aspect of the parameterizations presented is that the definition of the inverse heat deposition problem, which is adopted for their construction, provides a rigorous foundation for a highly flexible and general parameterization of energy deposition processes, which is essential for their inverse analysis. A preliminary proof is presented that shows the significance of these parameterizations for the application of similarity transformations to the inverse analysis of energy deposition processes. The applicability of similarity transforms to the inverse analysis of heat deposition is another property that follows from the specific definition of the inverse heat deposition problem considered here.     

基于Pro/E音箱前面板注射模CAD/CAM

Pro／E是功能强大的三维参数化造型软件，以音箱注射模为例，说明了Pro／E软件在模具设计与制造中应用的优越性。