Self-Adaptive Control System for Additive Manufacturing Using Double Electrode Micro Plasma Arc Welding

Chinese Journal of Mechanical Engineering

Nan Li¹  Miaomiao Han¹  Wen Yuan¹  Ding Fan²  Jiankang Huang²  Shurong Yu³ 

[1] School of Materials Science and Engineering, Lanzhou University of Technology, 730050, Lanzhou, China;School of Materials Science and Engineering, Lanzhou University of Technology, 730050, Lanzhou, China;State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, 730050, Lanzhou, China;State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, 730050, Lanzhou, China;School of Mechanical and Electrical Engineering, Lanzhou University of Technology, 730050, Lanzhou, China;

关键词: Double electrode microplasma arc welding;    Additive manufacturing;    Wire feed rate;    Torch stand-off distance;    Self-adaptive adjustment;   

DOI  :  10.1186/s10033-021-00581-4

来源: Springer

【 摘 要 】

Wire arc additive manufacturing (WAAM) has been investigated to deposit large-scale metal parts due to its high deposition efficiency and low material cost. However, in the process of automatically manufacturing the high-quality metal parts by WAAM, several problems about the heat build-up, the deposit-path optimization, and the stability of the process parameters need to be well addressed. To overcome these issues, a new WAAM method based on the double electrode micro plasma arc welding (DE-MPAW) was designed. The circuit principles of different metal-transfer models in the DE-MPAW deposition process were analyzed theoretically. The effects between the parameters, wire feed rate and torch stand-off distance, in the process of WAAM were investigated experimentally. In addition, a real-time DE-MPAW control system was developed to optimize and stabilize the deposition process by self-adaptively changing the wire feed rate and torch stand-off distance. Finally, a series of tests were performed to evaluate the control system’s performance. The results show that the capability against interferences in the process of WAAM has been enhanced by this self-adaptive adjustment system. Further, the deposition paths about the metal part’s layer heights in WAAM are simplified. Finally, the appearance of the WAAM-deposited metal layers is also improved with the use of the control system.

【 授权许可】

CC BY