Cold Gas Dynamics Manufacturing Process Development for Smart Parts

增材制造（AM）被描述为“下一次工业革命”，正在改变消费品的设计和制造。增材制造与传统的制造方法（TMM）截然不同，例如减法（铣削或钻孔）、成型（铸造或锻造）和连接（焊接或紧固）工艺。******塑料零件的AM被认为是最先进的。然而，金属和陶瓷的增材制造需要更广泛的研究和开发工作，以扩大结构和高性能功能部件的应用范围。需要努力实现增材制造的成熟，因为需要更多的工作来理解基本层面的工艺参数/工艺输出关系（工艺映射）。******近年来，渥太华大学的研究人员在推进低温气体动态喷涂增材制造（CGDSAM）的工程科学方面发挥了重要作用。CGDSAM仍处于起步阶段，可被视为金属和陶瓷的（固态）材料喷射AM工艺。尽管学术界一致认为，CGDSAM是TMM生产困难/昂贵的大型零件市场的有力候选人，并且早期的概念验证成功，但缺乏控制过程输出的基本知识。因此，需要过程“映射”以允许过程评估、改进、转移和商业实施。此外，AM的使用提供了生产传感器的潜力，允许现场监测AM机械零件的性能。*********研究表明，CGDSAM可以生产复杂形状的小尺寸（mm尺寸）非结构件，现在用于商业。最近的工作主要集中在钛零件的CGDSAM上，因为这些零件价格昂贵，使用TMM加工成本高，潜在市场很大。最近还演示了CGDSAM工艺在传感器生产中的潜力。************基于这些潜在利基市场应用的最新进展，该计划的长期目标是建立CGDSAM工艺“图”，并允许生产cm尺寸的钛合金零件，嵌入传感器，用于生产零件的无线原位性能监测。******结果将确定CGDSAM在钛合金零件生产中的潜力，不需要极其精细的复杂细节，并评估其优势，因为工艺吞吐量大（比目前现有的增材制造工艺高出几个数量级），并且没有通常限制增材制造零件尺寸的“内置托盘”。***该计划的积极成果也将使现场性能的监测/传输成为可能。这可以为维护优化和故障预防提供关键的部件性能反馈。它还可以为设计师提供反馈，以允许改进建模和修改新设计。

Portrayed as “the next industrial revolution”, additive manufacturing (AM) is transforming consumer product design and manufacturing. AM differs drastically from traditional manufacturing methods (TMM) such as subtractive (milling or drilling), formative (casting or forging) and joining (welding or fastening) processes. ******AM of plastic parts is considered as the state-of-the-art. However, AM of metals and ceramics requires more extensive research and development efforts to expand the scope of applications to structural and high-performance functional parts. Efforts are required to reach maturation of AM as more work is required to understand the process parameters/process output relationships at the fundamental level (process mapping).******In recent years, uOttawa researchers have been instrumental in advancing the engineering science of Cold Gas Dynamic Spray Additive Manufacturing (CGDSAM). CGDSAM is still in its infancy, and can be considered as a (solid state) Material Jetting AM process for metals and cermets. Despite academic consensus that CGDSAM is a strong candidate for the market of large parts that are difficult/expensive to produce by TMM and early proof-of-concept successes, there is a lack of fundamental knowledge on what controls the process output. As such, the process “mapping” is required to allow process evaluation, improvement, transfer and commercial implementation. Furthermore the use of AM offers the potential to produce sensors allowing in-situ monitoring of AM mechanical parts performance. *********Studies have shown that CGDSAM can produce complex shapes of small dimension (mm-size) non-structural parts that are now used commercially. Recent work has focused on CGDSAM of titanium parts due to the large potential market as these are expensive and costly to machine using TMM. Demonstration of the CGDSAM process potential for sensor production has also recently been made.************Based on these recent progresses for potential market niche applications, the long-term objective of this program is to establish the CGDSAM process “map” and allow the production of cm-size titanium alloy parts imbedded with sensors for wireless in-situ performance monitoring of the produced parts. ******The outcome will establish the potential of CGDSAM for titanium alloy part production that don't require extremely fine intricate details and assess its advantage due to the process large throughput (orders of magnitudes beyond current existing AM processes) and the absence of “built tray” typically limiting the size of AM parts.***The positive outcome of this program will also make monitoring/transmission of in-situ performance possible. This could provide crucial feedback on parts performance for maintenance optimisation and failure prevention. It could also provide feedback for designers to allow refined modeling and revision of new designs.