Development of surface finishing technology for complex micro-shaped parts using the magnetic abrasive finishing process

2023 Fiscal Year Final Research Report

• Project/Area Number: 21K03786
• 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: Utsunomiya University
• Principal Investigator: Zou Yanhua 宇都宮大学, 工学部, 教授 (10516678)
• Project Period (FY): 2021-04-01 – 2024-03-31
• Keywords: 磁気研磨法 / 変動磁場 / 微細複雑形状部品 / 表面仕上げ / 高能率加工 / 高精度加工

Outline of Final Research Achievements

Precision machining technology that can finish parts with complex micro-shapes to a nano-level without damaging the surfaces is in demand in various industrial fields. In this study, we proposed an ultra-precision machining method that utilizes an alternating magnetic field, in which the active movement of magnetic particles in the alternating magnetic field is linked to the abrasive grains, enabling precision machining while dispersing the particles. Magnetic field analysis was used to determine the optimal magnetic field configuration, and the formation and operating conditions of the dynamic magnetic brush generated by the magnetic finishing slurry in an alternating magnetic field were clarified. In addition, in order to realize surface finishing of parts with complex fine shapes, a new processing device using a 6-axis robot was developed toward practical application. Detailed finishing experiments were carried out, and the usefulness of this processing method was proved.

Free Research Field

生産工学・加工学

Academic Significance and Societal Importance of the Research Achievements

近年，医療・光学関連など様々な分野で精密部品の微細化への需要が拡大しており，それらの発展に伴い，微細部品の表面にダメージを与えずかつナノレベルに仕上げる精密研磨技術が求められている．本研究で提案した変動磁場を利用した磁気研磨法は，変動磁場中にある磁性粒子の活発な動きを磁性砥粒と連動させ，分散しながら精密加工が実現できるものである．本研究成果は，本加工法の有効性及びその基本的な加工特性を示したものである．また，様々な産業分野で超精密微細複雑形状部品の精密加工技術として斬新な技術として大いに期待される．