Wire and arc additive manufacturing with finishing process

2020 Fiscal Year Final Research Report

• Project/Area Number: 19K14858
• Research Category: Grant-in-Aid for Early-Career Scientists
• Allocation Type: Multi-year Fund
• Review Section: Basic Section 18020:Manufacturing and production engineering-related
• Research Institution: Saitama University
• Principal Investigator: Takeyuki Abe 埼玉大学, 理工学研究科, 助教 (60756469)
• Project Period (FY): 2019-04-01 – 2021-03-31
• Keywords: アディティブ・マニュファクチャリング / アーク放電 / 機械工作・生産工学 / 金属組織

Outline of Final Research Achievements

We proposed a new processing method that simultaneously performs metal additive manufacturing, which melts and deposits wire materials by arc discharge, and finishing processing using a rotary tool. The proposed method improves the shape accuracy of the accumulates, and at the same time suppresses the anisotropy of the microstructure of the accumulates by the stirring action and plastic strain given by the rotary tool. The microstructure of the accumulates after finishing with a cutting tool and FSB tool was evaluated, and the feasibility of the proposed method were shown. It was also clarified that the relationship between the solidification state of the accumulates and the anisotropy.

Free Research Field

生産工学・加工学

Academic Significance and Societal Importance of the Research Achievements

ワイヤ＋アーク放電式による積層造形物は他の指向性エネルギー堆積法による造形物と同様に，高い温度勾配と冷却速度によりデンドライト組織が成長しやすく，材料の異方性が問題となる．本研究成果により造形物表面付近の金属結晶の異方性が改善されることを明らかにした．これにより材料の機械的特性の改善が期待される．