Vasvári Gyula Ferenc, Csonka Dávid, Zsebe Tamás, Schiffer Ádám, Samardžić Ivan, Told Roland, Péntek Attila, Maróti Péter
Department of Mechanical Engineering, Faculty of Engineering and Information Technology, University of Pécs, Boszorkány Street 2, 7624 Pecs, Hungary.
Faculty of Engineering and Information Technology, Institute of Information and Electrical Technology, University of Pécs, Boszorkány Street 2, 7624 Pecs, Hungary.
Materials (Basel). 2021 Mar 22;14(6):1545. doi: 10.3390/ma14061545.
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.
基于金属熔化的增材制造技术主要使用粉末或丝状材料。本研究着重于开发一种基于冷金属过渡（CMT）焊接技术的金属3D打印工艺，以提高生产效率。已使用特殊的3D打印技术制造了铝合金测试样品。对这些样品进行了研究，以找出焊接参数与几何质量之间的相关性。进行了几何测量和拉伸强度实验，以确定用于可靠打印的合适焊接参数。产品的拉伸强度与原材料相比没有显著差异。高度超过60毫米时，由于焊接环境的热平衡，壁厚相对恒定。结果表明，焊接参数与打印精度之间可能存在联系。结果表明，在打印较大尺寸的样品时，在最大可靠焊枪移动速度下，理想几何形状的偏差将最小。总之，可以说基于CMT的增材制造可以是一种可靠、经济高效且快速的3D打印技术，具有更高的生产效率，且机械稳定性不会显著降低。
