3D Laser Forming of Doubly Curved Shapes: Process Prediction and Synthesis

双曲面形状的 3D 激光成型：过程预测和合成

• 批准号: 0355432
• 负责人: Y Lawrence Yao
• 金额: $ 19.67万
• 依托单位: Columbia University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2004
• 资助国家: 美国
• 起止时间: 2004-06-01 至 2008-05-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0355432&HistoricalAwards=false
• 关键词: 3D; Laser; Forming; Doubly; Curved

Surfaces of many engineering structures are designed as doubly curved shapes to fulfill functional requirements such as hydrodynamic, aesthetic, or structural. Experiments have shown that it is feasible to laser form 3D shapes such as doubly curved shapes, but forming accuracy issues need to be better understood via enhanced process prediction capability. Similarly, the process synthesis schemes developed for laser forming (LF) of simple shapes need further advancement for 3D LF process. This project is aimed at significantly advancing the state of knowledge LF technology, from idealized to more practical shapes, and from analysis to synthesis. The modeling and synthesis efforts will be accompanied by an experimental program including pre- and post-forming microstructure and mechanical property characterizations. Other high temperature deformation processes will be able to leverage upon the improved understanding and synthesis capabilities to be developed in the project. Practically, the success of the project will open-up new opportunities for manufacturing of high performance but conventionally hard-to-form materials, leading to innovative applications, thus opening new design options. The development of reliable process synthesis schemes will enable the process make its way to industrial applications, as a rapid prototyping tool for high production volume and a flexible manufacturing tool for low production volume sheet metal working. The results will have a significant impact on the economy and industry competitiveness since sheet metal working is so pervasive. Results from this project will be integrated into a graduate level course. Efforts will be made to involve undergraduate students, and to identify and recruit qualified students from traditionally underrepresented backgrounds.

许多工程结构的表面被设计成双弯曲形状，以满足功能要求，如流体动力学，美学或结构。实验表明，激光成形3D形状（如双曲面形状）是可行的，但成形精度问题需要通过增强的工艺预测能力来更好地理解。类似地，为简单形状的激光成形（LF）开发的工艺综合方案需要进一步改进以用于3D LF工艺。 该项目旨在显著推进LF技术的知识状态，从理想化到更实用的形状，从分析到综合。 建模和合成工作将伴随着一个实验计划，包括前和后形成的微观结构和力学性能表征。 其他高温变形工艺将能够利用该项目中开发的更好的理解和综合能力。 实际上，该项目的成功将为制造高性能但传统上难以成型的材料开辟新的机会，从而带来创新应用，从而开辟新的设计选择。可靠的工艺综合方案的开发将使该工艺成为工业应用的一种方式，作为高产量的快速原型工具和低产量金属板加工的灵活制造工具。结果将对经济和行业竞争力产生重大影响，因为钣金加工是如此普遍。 该项目的成果将被纳入研究生课程。 将努力让本科生参与进来，并从传统上代表性不足的背景中发现和招募合格的学生。