Development of air turbine spindle with variable stiffness for realizing micro-nano machining of the next generation

2016 Fiscal Year Final Research Report

• Project/Area Number: 26420092
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Design engineering/Machine functional elements/Tribology
• Research Institution: Fukuoka Institute of Technology
• Principal Investigator: KATO TOMONORI 福岡工業大学, 工学部, 准教授 (20390429)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 静圧空気軸受 / 空気圧 / 可変剛性 / 切削加工 / 工具損耗推定 / 圧力制御 / 省エネルギー化

Outline of Final Research Achievements

In this research, a disturbance-compensating and energy-saving control method of an air turbine spindle equipped with a rotation control system designed for use in milling. A method for in-process tool wear estimation of an air turbine spindle, which is equipped with a rotation control system for ultra-precision milling is also introduced.
By controlling the supply pressure to the aerostatic bearing quickly and precisely, a method of realizing an air turbine spindle with variable stiffness without changing its size is proposed. An aerostatic bearing type air turbine spindle whose thrust and radial pneumatic supply circuits are separated from each other is developed and the validity of the proposed method is confirmed.

Free Research Field

機械工学