An Impact-based Automatic Centering Actuator System for Ultra-Precision Turning
At a Glance
Section titled āAt a Glanceā| Metadata | Details |
|---|---|
| Publication Date | 2022-01-01 |
| Journal | Asian Society for Precision Engineering and Nanotechnology (ASPEN 2022) |
| Authors | Seung-Kook Ro, Gyungho Khim, DooāSun Choi |
| Institutions | Korea Institute of Machinery and Materials |
Abstract
Section titled āAbstractāIn this paper, we introduces an automatic workpiece centering system using an impact actuator for future use of automating centering process which is currently done bv time-consuming manual process.We were aimed to develop an actuator and automatic process to align workpiece center within 20 seconds.An impact actuator was designed to generate force to move work small displacement by continuously impacting during rotation.The proposed impact actuator has a voice coil motor for generating movements of two masses which are guided by miniature guides, and mass with smaller weight contacts workpiece.The measured eccentricity by a displacement was estimated on-line through LMS tracking method, and magnitude of excitation was calculated based on the tracked eccentricity.The proposed actuator was manufactured and integrated with a control system using low-cost micro-processor.The automatic centering actuator system was applied to a diamond turning machine for a micro lens core mold with continuous rotating speed of 60 rpm and 20 Hz of excitation frequency.It was demonstrated experimentally that centering workpiece was possible within 1 Pm and no more than 20 seconds.