Faculty Early Career Development: Virtual Design and Virtual Prototyping for Near Net Shape Manufactured Parts

9501760 Gadh该补助金为计算机辅助设计研究的职业奖提供资金。 它的目标是提供一个框架，在虚拟环境中创建形状设计和分析的可制造性和模具形状分析在虚拟原型环境。 这种方法应用的主要领域是近净形制造的零件，使用的工艺，如注塑成型或压铸。 这项研究有三个重要组成部分。 第一个重点是在虚拟环境中创建概念几何设计，第二个和第三个重点是将下游分析上游的虚拟设计阶段。 该方法将使用一组非均匀B样条来表示对象的表面模型，使用基于能量的方法，该方法利用弹簧连接表面的控制点，从而确保表面的平滑修改。 特征提取将被定义为更高级别实体的链，称为循环。 自动化模具设计将分两步进行。 在第一步中，将确定零件相对于模具打开方向的方向。 在第二步中，使用提取零件轮廓的差分深度滤波器的变体来提取分型线。 虚拟设计允许设计者头脑中的概念以自然的人类手势输入计算机。 此过程应加快设计时间，并使设计过程更加直观。

9501760 Gadh This grant provides funding for a Career award for research in computer aided design. Its goal is to provide a framework for creating shape designs in a virtual environment and analysis of manufacturability and die shape analysis in a virtual prototyping environment. The principal domain to which this approach is applied is near net-shape manufactured parts using processes such as injection molding or die casting. There are three significant components to this research. The first focuses on creation of concept geometric designs in a virtual environment, and the second and third focus on bringing downstream analysis upstream to the virtual design stage. The approach will be to use a set of non-uniform B-splines to represent the surface model of an object, using an energy based approach that utilizes springs connecting the control points of the surface, thus ensuring smooth modification of the surfaces. Feature extraction will be defined in terms of chains of higher level entities called loops. Automated die design will be performed in two steps. In the first step, the orientation of the part with respect to the die-open direction will be determined. In the second step, a parting line is extracted using a variation of the differential depth filter that extracts the silhouette of the part. Virtual design allows concepts that reside in the designer's mind to be input into a computer with natural human gestures. This procedure should speed design time and make the process of design more intuitive.