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

Materials

GyulaFerenc Vasvári¹  Dávid Csonka¹  Tamás Zsebe¹  Ivan Samardžić²  Ádám Schiffer³  Attila Péntek⁴  Péter Maróti⁴  Roland Told⁴ 

[1] Department of Mechanical Engineering, Faculty of Engineering and Information Technology, University of Pécs, Boszorkány Street 2, 7624 Pecs, Hungary;Department of Technology, Faculty of Mechanical Engineering, University of Slavonski Brod, Gundulića 20A, 35000 Slavonski Brod, Croatia;Faculty of Engineering and Information Technology, Institute of Information and Electrical Technology, University of Pécs, Boszorkány Street 2, 7624 Pecs, Hungary;Medical Simulation Education Center, Medical School, University of Pecs, Szigeti Street 12, 7624 Pécs, Hungary;

关键词: additive manufacturing;    cold metal transfer;    3D printing;    geometrical analysis;    aluminium;    mechanical testing;   

DOI  :  10.3390/ma14061545

来源: DOAJ

【 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.

【 授权许可】

Unknown