Rapid Generation and Sliding Characteristics of Aligned Microtextures by Phase-Controlled Ultrasonic Cutting

2023 Fiscal Year Final Research Report

• Project/Area Number: 21H01225
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Single-year Grants
• Section: 一般
• Review Section: Basic Section 18020:Manufacturing and production engineering-related
• Research Institution: Nagaoka University of Technology
• Principal Investigator: Isobe Hiromi 長岡技術科学大学, 工学研究科, 教授 (60272861)
• Co-Investigator(Kenkyū-buntansha): 河野 大輔 京都大学, 工学研究科, 准教授 (80576504) ; 櫻田 陽 秋田工業高等専門学校, その他部局等, 准教授 (90442681) ; 原 圭祐 長岡技術科学大学, 工学研究科, 准教授 (30515812) ; 田浦 裕生 近畿大学, 理工学部, 准教授 (20334691)
• Project Period (FY): 2021-04-01 – 2024-03-31
• Keywords: マイクロテクスチャ / バイオミメティクス / 旋盤加工 / 切削加工 / 超音波加工

Outline of Final Research Achievements

By synchronizing the vibration state of the cutting tool at a sufficiently high speed compared with the ultrasonic frequency and with high accuracy with respect to the workpiece feed motion (In a lathe, main shaft rotational motion), we have constructed a system for creating aligned microtextures with pitch intervals of several to several tens of μm and depth of several μm by machine tools.
Furthermore, using this system, we constructed a system that can arbitrarily control the position of the next texture relative to the position of the previous texture. If adjacent textures were arranged, a linear array was obtained, and if they were arranged alternately, a staggered texture array was obtained. And, it was confirmed by the experiment that the friction coefficient increases and decreases by the pattern. Thus, high-speed creation of functional surface texturing can be realized.

Free Research Field

精密加工

Academic Significance and Societal Importance of the Research Achievements

バイオミメティクスに代表される微細構造による摩擦低減の効果は広く知られている。しかし、その微細構造を大量生産する手法は、フィルムプロセスなどに限られており、機械構造部品への適用は生産性の観点から実用化されていない。本研究成果により、機械摺動部材の摩擦低減が実現できると、その波及効果によってトータルでのエネルギ効率改善が期待できる。今後は、さまざまな実用展開を進めていくことで、社会への還元を目指す。