Investigation on eletric/magnetic field assisted electrochemical machining

• Main Authors: Jheng-Jhe Li, 李政哲
• Other Authors: Chia-Lung Kuo
• Format: Others
• Language: zh-TW
• Published: 2011
• Online Access: http://ndltd.ncl.edu.tw/handle/55397772026409445479

碩士 === 國立雲林科技大學 === 機械工程系碩士班 === 99 === For the improvement of electrochemical machining efficiency and surface processing quality, the electric/magnetic-field-aided method has been applied for electrochemical processing. The advantages of this technology include high processing efficiency, fine surface quality and no residual stress and heat-affected zone. Besides the attrition of cutting tools is lower and the influence of metal hardness for processing is dispensable. Hence that can be generally used for conductive material. A magnetic fieled will be introduced in the electrochemical procedure by the electrodeψ1mm SUS 440C. A finer finished surface can be achieved by the flow direction change of charged particles in the electrolyte which is affected by the Lorentz force resulting from the vertical relationship between the current and magnetic direction during the reaction. By the electrochemical processing with jet streams, the average roughness lies between 0.02μm and 0.04μm under the condition of the non-rotary electrode. That reveals that the better processing results can be obtained because the electrolysis product will be rejected efficiently by the flow force of electrolyte. At the procedure of eletric-field-aided electrochemical processing, two power suppliers have been employed. One is the pulse direct-current supplier connected with the electrode and workpiece. The other is continuous direct-current supplier linked with the aided-anode which can actively restrict the stray machining effect. Various complicated and dimensional patterns on the workpiece can be fabricated by the integration of electrochemical processing and photolithography process. The isolated area preserved by photoresistor will be processed by electrochemical processing to fabricate the microstructures on the surface that will be not influenced by the stray machining and can realize simultaneous processing of array microstructures. The pre-production problem of abnormity anodes can be overcome.