Development of a Novel Burnishing Tools for Surface Modification of Thin-walled Materials

Abstract

Burnishing, a type of surface modification process, is an effective processing method because it can improve surface roughness, fatigue strength, and corrosion resistance in one process, and it can be performed on CNC machine tools. On the other hand, processing of thin-walled materials and free-form surfaces is not widely used because such material can be easily deformed due to the large burnishing force. This research aims to develop a novel burnishing tool that can process thin-walled materials. The prototype of the burnishing tool that cancels deformation by applying force from both sides was designed and fabricated. According to the experimental results, the surface roughness was improved to about Ra = 0.5 μm, and the deformation was reduced to about one-fourth of the conventional burnishing method.