Fabricating Micro-texture on Surface of Cutting Tool Based on NC WEDM Technology

Abstract

Abstract It is a very complex and difficult technology to fabricate micro-texture on tool surface. At present, available technology such as laser marking, femtosecond laser, ion beam and WEDM can be used to fabricate micro texture. However, little research has been done on the fabrication of micro-texture by WEDM. In this experiment, micro-texture was fabricated on surface of cemented carbide tool by NC WEDM technology. The effect of WEDM parameters (pulse width, pulse stop and current) on the width of micro-texture was studied, so as to control the size of micro-texture fabricated by WEDM. At the same time, the least square method was used to establish the prediction model between the width of micro-texture and the WEDM parameters. The experimental results showed that the micro-texture size fabricated by WEDM technology was in the micron scale, which met the requirements of micro-texture tool size in the field of cutting. Pulse width, pulse stop and current affected the width of micro-texture, but pulse width was the main factor affecting the width of micro-texture. The prediction model of micro-texture width was successfully established by least square method.