| dc.description.abstract | This study proposes using Electrochemical Machining (ECM) combined with a magnetic field generated by permanent ring magnets to assist in removing burrs from metal workpieces′ micro-holes and polishing the hole wall surfaces. The research aims to evaluate the surface flatness of the workpieces after machining. Experimental data includes surface roughness (Ra), hole expansion amount, surface morphology, and oxidation film measurements. The study seeks to establish appropriate machining parameters for subsequent research on array hole processing, ultimately aiming for high productivity and quality in array hole electrochemical machining and inner wall polishing processes. The experiments will use SUS 304 stainless steel as the primary material for processing research, focusing on process planning and parameter studies required for single-hole and array hole electrochemical polishing. To meet various product requirements for burr removal and inner wall polishing of array holes, this research will propose an electrochemical machining method for polishing the inner walls of array micro-features on stainless steel workpieces. Given the numerous small-diameter array micro-holes, the study will involve designing and fabricating electrode molds and establishing finite element models to analyze fluid flow and electric fields. It will investigate the effects of various parameters, such as the presence and intensity of the magnetic field, magnetic field direction, electrolyte flow rate, machining voltage, and current, on machining outcomes to achieve high precision and improved efficiency. From the experimental results, it is evident that in single-hole parameter experiments, there is a close relationship between magnetic field strength and electric field intensity during machining. Higher magnetic field strength and machining voltage enhance polishing efficiency. In array hole machining experiments, adding a magnetic field improved hole diameter uniformity by 33.3% compared to experiments without a magnetic field, and the surface roughness of the hole walls improved by 6.45%. Additionally, this machining method is expected to significantly reduce the development cycle of workpiece fixtures, enhance machining quality, and further meet the characteristics of large-scale rapid production, high efficiency, and high productivity, providing strong support for research and development in electrochemical micro-hole machining technology. | en_US |