A STUDY ON THE DEVELOPMENT OF MAGNETICALLY DRIVEN INTERNAL FINISHING TECHNIQUE

Abstract

This study develops the magnetically driven internal finishing (MDIF) technique to address the challenge of finishing complicate and rough internal surfaces, especially the additively manufactured (AM-ed) internal structures. It contributes to three aspects in internal finishing technology, i.e., the device and tooling, the theoretical modelling and the application. The developed MDIF may be applied in multi-axis machine centres so that complicated internal surface may be polished by appropriate tool path planning. The novel magnetic polishing tool breaks the shackles of the conventional magnetic abrasive particles and brings forth to the development of more novel functional polishing tools. Besides, the theoretical modelling driven by the physical mechanism has laid down a framework for the contact pressure calculation and polished profile prediction in pressure-copy finishing processes. Finally, the experimental and theoretic study of MDIF on AM-ed parts broadens the application of internal finishing techniques from conventionally manufactured parts to additively manufactured components.