With the progress of science and technology, the manufacturing industry has ushered in rapid development. The emergence of more difficult-to-machine new materials and alloys has made their corresponding high-quality processing methods a research hotspot in the field of advanced manufacturing. The combined machining of EDM and electrolysis solves the problems caused by EDM and can realize high-quality and high-precision machining with low surface roughness and no recast layer.However, the current summary of EDM-ECM processing technology is not comprehensive enough. In the combined machining of EDM and electrolysis, developing the working platform and improving the working fluid are the keys to realising the combined machining. At the same time, understanding machining mechanism and switching the machining mode is also the key to improving the machining effect. This paper first introduces the improvement of working equipment and the research status of working fluid in EDM-ECM. Secondly, it introduces the application field of EDM-ECM technology. Finally, it discusses the possible future research directions of combined machining and provides research ideas for subsequent researchers.
High-quality machining of micro-holes has always been one of the challenges in the manufacturing industry, and Electrical Discharge and Electrochemical Hybrid machining (EDM-ECM), a non-traditional machining process for machining difficult-to-cut materials, is prominent in the field of micro-holes manufacturing. This paper investigates the technology and analyses the machining parameters, which are the key factors affecting its performance. The working fluid is at the heart of the proper functioning of hybrid EDM, as its presence makes it possible for EDM and ECM to co-occur. In order to enhance the machining efficiency of EDM-ECM, a triple hybrid machining method based on EDM-ECM is introduced. Finally, the scope of the technique for future research is briefly discussed.
Aluminum electrolytic capacitors are essential electronic components in circuit systems and are widely used in modern industry. The anode foil is the core component of aluminum electrolytic capacitors. The characteristics of the anode foil oxide film directly determine the performance level of the capacitor. Hydration and formation are critical processes for preparing anode foil oxide films, and there is no systematic review of these two processes. This paper analyzes the current status of domestic and international research on hydration and formation processes, introduces methods to control the process conditions to enhance the oxide film properties, and provides an outlook for future research.
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