MRI: Acquisition of a Solid Freeform Fabrication Laboratory for Interdisciplinary Research and Education in Manufacturing through a University/Industry Consortium

MRI：通过大学/行业联盟收购固体自由形状制造实验室，用于制造业跨学科研究和教育

• 批准号: 0079397
• 负责人: John DuPont
• 金额: $ 34.05万
• 依托单位: Lehigh University
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2000
• 资助国家: 美国
• 起止时间: 2000-07-15 至 2003-06-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=0079397&HistoricalAwards=false
• 关键词: MRI; Acquisition; Solid; Freeform; Fabrication

This grant provides funding for the purchase of a Laser Engineered Net Shaping (LENS) system and a Fused Deposition Modeling (FDM) unit for interdisciplinary research and education in Solid Freeform Fabrication (SFF). The primary objective of the research is to develop science-based processing and microstructure models that will aid in moving LENS from the proof-of-concept stage towards full scale implementation by industry. Processing models will be developed for predicting heat flow, minimizing residual stress and distortion, controlling microstructure, and optimizing tool path planning. The LENS unit will be used for model validation and development of processing algorithms for controlling microstructure and minimizing distortion. Methods for depositing components with graded microstructures and properties will also be investigated through both model and experimental based activities. The role of powder properties on flow uniformity will be assessed, and the LENS process will be evaluated to identify advantages and limitations relative to competing SFF processes. The instruments will be used for education through undergraduate course instruction. In this educational effort, the FDM unit will be used by undergraduates in the Materials, Mechanical, and Industrial Engineering Departments in an integrated manufacturing course to create solid models from computer aided drawings. Once solid models are created, the LENS unit will then be used to prepare functional prototypes for performance testing. New instruction modules on rapid prototyping and SFF will be developed jointly between the participating engineering departments to support the new equipment.From these efforts, generic models and algorithms will be developed that can be applied by end users for process optimization in order to avoid "trial and error" approaches to LENS manufacturing. The results of this research will be used by industrial partners to fabricate components with reduced manufacturing time, improved dimensional accuracy, and properties that are tailored for enhanced performance. The educational activities will teach undergraduate students how to apply basic concepts in materials, mechanical, and industrial engineering to manufacture components using SFF processes.

该赠款为购买激光工程网络成形 (LENS) 系统和熔融沉积建模 (FDM) 装置提供资金，用于固体自由成型制造 (SFF) 的跨学科研究和教育。该研究的主要目标是开发基于科学的加工和微观结构模型，这将有助于将 LENS 从概念验证阶段转向工业界的全面实施。将开发加工模型来预测热流、最小化残余应力和变形、控制微观结构以及优化刀具路径规划。 LENS 单元将用于模型验证和开发处理算法，以控制微观结构并最大限度地减少失真。还将通过基于模型和实验的活动来研究沉积具有分级微观结构和性能的组件的方法。我们将评估粉末特性对流动均匀性的作用，并对 LENS 工艺进行评估，以确定相对于竞争性 SFF 工艺的优势和局限性。这些仪器将用于本科课程教学的教育。在这项教育工作中，材料、机械和工业工程系的本科生将在综合制造课程中使用 FDM 单元，通过计算机辅助绘图创建实体模型。创建实体模型后，LENS 单元将用于准备用于性能测试的功能原型。参与工程部门将联合开发快速原型和 SFF 的新指令模块，以支持新设备。通过这些努力，将开发通用模型和算法，可供最终用户用于流程优化，以避免“试验”和误差”的镜片制造方法。工业合作伙伴将利用这项研究的结果来制造组件，以缩短制造时间、提高尺寸精度以及为增强性能而定制的特性。教育活动将教授本科生如何应用材料、机械和工业工程的基本概念，使用 SFF 工艺制造组件。