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首页> 外文期刊>International Journal of Machine Tools & Manufacture: Design, research and application >Cold gas dynamic manufacturing: A non-thermal approach to freeform fabrication
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Cold gas dynamic manufacturing: A non-thermal approach to freeform fabrication

机译：冷气动态制造：自由形式制造的非热方法

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This paper reports on the development of a novel freeform fabrication technique using a cold spray (CS) system. In the CS process, metallic powder particles are accelerated in a supersonic gas jet and impacted with a substrate at speeds in excess of 600m/s. The non-melting nature of its deposition mechanism ensures that the sprayed material is free from thermally induced tensile stresses, while the underlying substrate remains unchanged. The process is seen as a viable method for additive manufacturing because of its high deposition rates and controllable spray jet. A process was developed to investigate the potential of non-thermal freeform fabrication and was coined Cold Gas Dynamic Manufacturing (CGDM). Here, additive and subtractive techniques were combined to enable the production of complex geometries. Whereas most CS facilities concentrate on the application of wear or corrosion-resistant coatings, CGDM is dedicated to the production of freeform components, whilst still retaining an inherent coating ability. The process can produce functional forms using novel manufacturing strategies that are unique to CS. This paper presents information on the process, and details the various strategies employed during component fabrication. It was possible to construct components from many materials, including titanium, which exhibited freeform surfaces, internal channels and embedded devices. A breakdown of the process economics is also provided, with and without helium recycling.
机译：本文报道了使用冷喷涂（CS）系统的新型自由形式制造技术的发展。在CS工艺中，金属粉末颗粒在超音速气体喷流中加速，并以超过600m / s的速度撞击基材。其沉积机制的非熔化特性确保了喷涂材料不受热引起的拉应力的影响，而下方的基材则保持不变。由于其高沉积速率和可控的喷射流，该工艺被视为一种可行的增材制造方法。开发了一种方法来研究非热自由形式制造的潜力，并称为冷气动态制造（CGDM）。在这里，加法和减法技术相结合以实现复杂几何形状的生产。尽管大多数CS设备都专注于耐磨或耐腐蚀涂层的应用，但CGDM致力于生产自由形状的组件，同时仍保留了固有的涂层能力。该过程可以使用CS独有的新颖制造策略来生产功能形式。本文介绍了有关该过程的信息，并详细介绍了组件制造过程中采用的各种策略。可以用多种材料构造组件，包括钛，这种材料具有自由曲面，内部通道和嵌入式设备。还提供了有或没有氦回收的过程经济性的细分。

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