Burnishing and Electrofinishing in Screw Surface Polishing

摘要

The current study discusses the surface finish of several common die materials,of which the screw-surface is finished by compound processes of electrochemical finishing and burnishing.The burnishing-tool uses ceramic material connected with the electrode and moves,following the electrode,to burnish the workpiece.In the experiment,the electrode is used with a continuous and pulsed direct current.The results show that the use of a higher rotational speed for the electrode and burnishing-tool is advantageous to the finish.A partial form with a thinner heavy section performs the best finish effect in the current investigation.Pulsed direct current can slightly improve the finish effect.The burnishing process can increase the finish effect.An effective and low-cost finish processes through burnishing assistance following electrochemical finishing after screw machining offers a fast improvement for the surface roughness of the screw-surface and is a new application in the screw finishing process.