NSF Young Investigator: Scanned Thermal Rapid Prototyping Processes

NSF 青年研究员：扫描热快速原型制作过程

• 批准号: 9457206
• 负责人: Charalabos Doumanidis
• 金额: $ 27.5万
• 依托单位: Tufts University
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1994
• 资助国家: 美国
• 起止时间: 1994-09-15 至 1996-10-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9457206&HistoricalAwards=false
• 关键词: NSF; Young; Investigator; Scanned; Thermal

9457206 Doumanidis The research addresses the issue of simultaneous, real-time regulation of part geometry and thermal field, in thermal rapid prototyping, by redesigning the process arrangement and implementing a scanned thermal actuation. In thermal rapid prototyping, both the material supply, by a wire feeder or spray, and heat transfer, by a plasma or laser source, need to be modulated during the process as successive layers of material are deposited or removed from the part surface. The layer profile geometry and thermal distribution on the product surface will be measured by a laser vision system, and an infrared camera respectively, and used for feedback to the thermo-geometrical controller. This will adjust the material and heat source intensity and guide their motion on dynamic trajectories to the areas where their action is needed most, so as to obtain the desired geometric tolerances, the material structure and properties, and stress effects in the part. The calibrated controller will be implemented experimentally on several rapid prototyping techniques, i.e. laminated object manufacturing, laser milling, fused material deposition and thermal spray deposition. The research will also be coupled to supportive teaching activities, enriching the thermal manufacturing curriculum at the university. These include the establishment of a graduate manufacturing automation seminar with guest lectures and industrial sponsorship. A series of motivating introductory courses will also be developed, with multidisciplinary manufacturing content and hands-on prototyping projects, in the laboratory.

9457206 Doumanidis 该研究通过重新设计工艺布置和实施扫描热驱动，解决了热快速原型制作中零件几何形状和热场的同步实时调节问题。 在热快速原型制造中，随着连续的材料层从零件表面沉积或去除，通过送丝机或喷涂进行的材料供应以及通过等离子体或激光源进行的热传递都需要在过程中进行调节。 产品表面的层轮廓几何形状和热分布将分别由激光视觉系统和红外相机测量，并用于反馈到热几何控制器。 这将调整材料和热源强度，并引导它们在动态轨迹上运动到最需要它们作用的区域，从而获得所需的几何公差、材料结构和性能以及零件中的应力效应。 校准后的控制器将在几种快速原型技术上进行实验实施，即层压物体制造、激光铣削、熔融材料沉积和热喷涂沉积。 该研究还将与支持性教学活动相结合，丰富大学的热制造课程。 其中包括建立研究生制造自动化研讨会，提供客座讲座和工业赞助。 还将在实验室开发一系列激励人心的入门课程，其中包括多学科制造内容和动手原型设计项目。