A Novel Magnetic Source Design for Flexible Fixturing Based on Magnetorheological Fluid

Magnetic source configuration plays an important role in flexible fixturing based on magnetorheological fluid (MRF). In this article, a novel magnetic source connected to spindle of machine tool is designed to generate specific magnetic field in machining region. The magnetic field can follow machining trajectory in real time, solidifying magnetorheological fluid under current machining region and constituting a mirror support to axial milling force. The magnetic field makes magnetorheological fluid work in squeeze mode, thus providing a stronger supporting capability under the same magnetic field. The magnetic source has self-cooling function, permitting a very strong coil current throughout the whole machining process. Compared with other magnetic sources used in magnetorheological fixturing, magnetic source researched in this paper is more universal and economical.