H. S. Dhami, Pritish Panda, Puli Saikiran, Richie Garg, Koushik Viswanathan
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引用次数: 0
摘要
基于商业定向能沉积(DED)技术的金属快速成型制造系统在研究应用中普遍受到以下限制:在处理各种非标准粉末时缺乏灵活性、缺乏精细的系统控制以及传感器集成的固有困难。在这项工作中,我们介绍了用于金属添加制造的传感集成平台的设计。通过模块化设计,可以轻松修改激光集成或粉末输送机制等特定子系统,从而实现商业系统难以实现的功能。举例来说,我们使用通过磨损和水雾化技术生产的非常规廉价粉末展示了 DED 的性能。我们使用集成传感器对系统性能进行了评估,并辅以数值/分析计算。在这些结果的基础上,生成了结合热场和粉末流动的额定运行图,用于确定适合给定材料/制造组合的工艺参数,并可普遍适用于任何 DED AM 系统。除了处理非球形和替代来源的粉末外,该系统还展示了打印多种材料复杂轮廓的能力。
A sensing integrated metal additive manufacturing platform for exploring the use of non-standard powders
Research applications that rely on commercial directed energy deposition (DED) based metal additive manufacturing systems are commonly constrained by their inflexibility in handling various non-standard powders, lack of fine system control and inherent difficulty with sensor integration. In this work, we present the design of a sensing-integrated platform for metal additive manufacturing. A modular design allows easy modification of specific sub-systems, such as laser integration or powder delivery mechanisms, to enable capabilities that are difficult to realize with commercial systems. As an example, we demonstrate DED performance using non-conventional inexpensive powders produced via abrasion and water atomization techniques. System performance is evaluated using integrated sensors and complemented by numerical/ analytical calculations. Based on these results, a nominal operation map combining thermal field with powder flow is generated for determining process parameters suitable for a given material/build combination and can be generally applicable for any DED AM system. In addition to handling non-spherical and alternatively sourced powders, the system capabilities for printing multi-material complex contours are demonstrated.