Fabrication of an Electrode Insulation Layer of Electrochemical Machining by Using Hot Dip Aluminizing and Micro-Arc Oxidation Method

• Main Authors: Chih-Yang Ku, 古智陽
• Other Authors: 洪榮洲
• Format: Others
• Language: zh-TW
• Published: 2016
• Online Access: http://ndltd.ncl.edu.tw/handle/84703450504114698779

碩士 === 逢甲大學 === 機械與電腦輔助工程學系 === 104 === In this research, electrode insulation of the electrochemical machining tool has been produced by hot dip aluminized micro arc oxidation techniques. In order to form an effective insolation layer on the tungsten carbide tool and achieve higher precision, the tool will then be micro-arc oxidizing, convert the aluminum-rich into aluminum oxide insolating layer. Withstanding Voltage of the tool is being tested afterward by sodium chloride electrolysis method, and the surface and the cross section is being observed. Eventually the tools were examined and discussed for their machining performance by ECM drilling through stainless steel plate. We were expecting to produce a precise and better insulation. By reducing ECM stray effect, the precision can be achieved. The experimental result shows the optimum parameters are aluminum dipping for 4 minutes, 450 V of micro-arc voltage for 20 minutes and 40 minutes of boiling water sealing, reaching 10.2V of withstanding voltage. A further electrochemical drilling has been done to explore the effect of insolation. Two electrodes, with and without insolation had been compared. The difference between the entrance and the exit diameter of the hole of insolated tool reaches 17um, compare to the one without insolation, we have successfully reduce 81um. The result shows that the insolation has massively reduce the stray effect, and achieve high precision machining.