Title: Tool wear estimation method in milling process using air turbine spindle rotation-control system equipped with disturbance force observer

Authors: Tomonori Kato; Tatsuki Otsubo; Kohei Shimazaki; Shotaro Matsuguchi; Yusuke Okamoto; Takanori Yazawa

Addresses: Department of Intelligent Mechanical Engineering, Faculty of Engineering, Fukuoka Institute of Technology, 3-30-1 Wajiro-higashi, Higashi-ku, Fukuoka 8110295, Japan ' Department of Intelligent Mechanical Engineering, Faculty of Engineering, Fukuoka Institute of Technology, 3-30-1 Wajiro-higashi, Higashi-ku, Fukuoka 8110295, Japan ' Department of Intelligent Mechanical Engineering, Faculty of Engineering, Fukuoka Institute of Technology, 3-30-1 Wajiro-higashi, Higashi-ku, Fukuoka 8110295, Japan ' Department of Intelligent Mechanical Engineering, Faculty of Engineering, Fukuoka Institute of Technology, 3-30-1 Wajiro-higashi, Higashi-ku, Fukuoka 8110295, Japan ' Department of Intelligent Mechanical Engineering, Faculty of Engineering, Fukuoka Institute of Technology, 3-30-1 Wajiro-higashi, Higashi-ku, Fukuoka 8110295, Japan ' Department of Intelligent Mechanical Engineering, Faculty of Engineering, Fukuoka Institute of Technology, 3-30-1 Wajiro-higashi, Higashi-ku, Fukuoka 8110295, Japan

Abstract: The authors investigate a disturbance-compensating and energy-saving control method for air turbine spindles equipped with a rotation control system designed for use in ultra-precision milling. The controllability and energy-conserving characteristics of the proposed method using the proposed pneumatic regulating device, called a high-precision quick-response pneumatic pressure regulator, were demonstrated experimentally previously. Herein, the proposed rotation-controlled air turbine spindle is first summarised. Subsequently, the proposed rotation-controlled air turbine spindle is set to a milling machine and applied to the milling of an alloy tool steel, to gain data and validate the effectiveness of the in-process tool wear estimation method that have been recently developed and proposed by the authors. Particularly, to evaluate the possibility of applying the proposed estimation method to three-dimensional milling, milling experiments where the air turbine spindle is set at a 45° incline were conducted and the results indicate a high possibility of the proposed method.

Keywords: pneumatics; air turbine spindle; disturbance force; milling; tool wear estimation.

DOI: 10.1504/IJHM.2018.097288

International Journal of Hydromechatronics, 2018 Vol.1 No.4, pp.384 - 402

Received: 14 Aug 2018
Accepted: 07 Sep 2018
Published online: 10 Jan 2019 *

Full-text access for editors Full-text access for subscribers Purchase this article Comment on this article