Design Framework and Manufacturing of an Active Magnetic Bearing Spindle for Micro-Milling Applications

2026-02-26

AI Summary

This study addresses the challenges of excessive friction and severe thermal expansion in conventional rolling-element bearings under the high-speed operation of micro-milling spindles, as well as the lack of a systematic design methodology for active magnetic bearings (AMBs). To overcome these limitations, this work proposes a comprehensive framework for the systematic design and fabrication of an AMB spindle tailored for micro-milling applications. The framework integrates a multidisciplinary co-design process that emphasizes manufacturability and engineering practicality, coupled with high-precision manufacturing techniques to enable contactless, lubrication-free ultra-high-speed operation. A prototype AMB spindle was successfully developed and validated, demonstrating the effectiveness and engineering feasibility of the proposed approach. This work establishes, for the first time, a systematic design methodology for AMB spindles specifically suited to micro-milling scenarios.

Technology Category

• Multiagent Systems: Mechanism Design
• Cognitive Modeling & Cognitive Systems: Adaptive Behavior
• Machine Learning: Active Learning

Application Category

• Responsible Web: Machine-in-the-loop, human agency and autonomy
• Systems and Infrastructure for Web, Mobile and WoT: Applied ML and AI for Web-based mobile applications
• User Modeling, Personalization and Recommendation: Federated recommendation systems and personalization

Abstract

Micro-milling spindles require high rotational speeds where conventional rolling element bearings face limitations such as friction and thermal expansion. Active magnetic bearings (AMBs) address these challenges by providing non-contact and lubrication-free operation at ultra-high speeds with the ability to actively regulate spindle dynamics. The existing literature on AMB spindles has mainly reported specific prototype realizations or control system implementations for specific spindle dynamics. Consequently, design knowledge remains fragmented across isolated successful studies. This paper addresses this gap by presenting a systematic and iterative framework to design and manufacture a micro-milling AMB spindle. The process involves a multidisciplinary design flow with a focus on critical practical aspects of manufacturing. The realized spindle is reported as a case study.

Problem

• Active Magnetic Bearing
• Micro-milling
• Spindle Design
• Design Framework
• Manufacturing

Innovation

• Active Magnetic Bearings
• Micro-milling Spindle
• Design Framework
• Multidisciplinary Design
• Non-contact Operation