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CMT Additive Manufacturing Parameters Defining Aluminium Alloy Object Geometry and Mechanical Properties

机译：CMT添加剂制造参数定义铝合金物体几何和机械性能

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摘要

Additive manufacturing technologies based on metal melting use materials mainly in powder or wire form. This study focuses on developing a metal 3D printing process based on cold metal transfer (CMT) welding technology, in order to achieve enhanced productivity. Aluminium alloy test specimens have been fabricated using a special 3D printing technology. The probes were investigated to find correlation between the welding parameters and geometric quality. Geometric measurements and tensile strength experiments were performed to determine the appropriate welding parameters for reliable printing. The tensile strength of the product does not differ significantly from the raw material. Above 60 mm height, the wall thickness is relatively constant due to the thermal balance of the welding environment. The results suggest that there might be a connection between the welding parameters and the printing accuracy. It is demonstrated that the deviation of ideal geometry will be the smallest at the maximum reliable welding torch movement speed, while printing larger specimens. As a conclusion, it can be stated that CMT-based additive manufacturing can be a reliable, cost-effective and rapid 3D printing technology with enhanced productivity, but without significant decrease in mechanical stability.
机译：基于金属熔化的添加剂制造技术主要用材料以粉末或丝形式使用。本研究侧重于基于冷金属转移（CMT）焊接技术的金属3D印刷过程，以实现增强的生产率。使用特殊的3D印刷技术制造了铝合金试样。研究了探针以找到焊接参数与几何质量之间的相关性。进行几何测量和拉伸强度实验以确定可靠印刷的适当焊接参数。产品的拉伸强度与原料没有显着差异。由于焊接环境的热平衡，高于60毫米的高度，壁厚相对恒定。结果表明，焊接参数和印刷精度之间可能存在连接。结果表明，理想几何形状的偏差将以最大可靠的焊炬运动速度最小，同时印刷较大的标本。作为结论，可以说基于CMT的添加剂制造可以是可靠的，具有成本效益和快速的3D印刷技术，其生产率增强，但没有机械稳定性显着降低。

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