Cutting process of single crystal titanium and improvement of machinability in machining of rolled titanium alloy with texture

2022 Fiscal Year Final Research Report

• Project/Area Number: 20K04197
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 18020:Manufacturing and production engineering-related
• Research Institution: Ashikaga University
• Principal Investigator: Tamura Shoichi 足利大学, 工学部, 教授 (80641951)
• Co-Investigator(Kenkyū-buntansha): 鏑木 哲志 群馬県立産業技術センター, その他部局等, 係長 (20522379)
• Project Period (FY): 2020-04-01 – 2023-03-31
• Keywords: チタン合金 / 異方性 / すべり系 / 圧延 / 切削加工 / せん断変形

Outline of Final Research Achievements

In the machining of rolled titanium alloy with a rotary tool, the cutting force varies depending on the relative angle between the cutting direction and the rolling direction due to the anisotropy in the slip system of the rolled titanium alloy. This study aimed to investigate and improve the cutting process of rolled titanium alloy. The quality of the machined surface was enhanced when the cutting direction was parallel to the rolling direction because the shear plane was aligned with the slip direction. Additionally, the cutting energy was evaluated with changing the cutter feed direction in slot milling. It was suggested that the energy was reduced by controlling the feed direction to be perpendicular to the rolling direction.

Free Research Field

機械加工

Academic Significance and Societal Importance of the Research Achievements

現在、様々な産業で広く使用されている圧延チタン合金の切削加工において、材料の異方性の観点から切削特性に影響を及ぼす影響を調査し、加工性の良い切削方向や切削エネルギを削減する工具送り方向を見出した。これはエネルギ抑制という社会的ニーズに貢献する成果と言える。また、本課題ではチタン合金を対象に研究を行ったが、他の異方性材料を切削する需要も存在している。今回の研究成果は、これらの異方性材料における具体的な切削加工の改善策にも関連するものであり、社会的な意義を持つと考えられる。