Study On Micro Electrolytic Machining And Composite Processing Technology With Fiber Laser Mask

During electrochemical machining, metal is removed by ions dissolution. The ions is very small union, and the eletrochemical machining will be one of micro-machining thechnologies. By using high-frequency ultra-short pulse power supply in Electrochemistry, from the processing mechanism, a special physical and chemical properties of electrochemical machining gap can greatly make replication accuracy, repeatability, surface quality, processing efficiency and process stability of high frequency ultra-short pulse electrochemical machining improve. A new kind of ultra-short pulse power supply is developed. By reasonable adjusting pulse interval and pulse width, the reactants generated in a ultra-short pulse is very little, making inter-electrode electrolyte easily update and recover during pulse interval. So the electrochemical machining dimensional accuracy, form accuracy, surface quality has greatly been improved. By using the ultra-short pulse power supply developed, the micro tool electrode is frabricated by micro electrochemical machining, and the micro structure is formed by electrochemical milling.The research on electrochemical micromachining with fiber laser surface modification was carried out. The high-quality pulsed fiber laser quality beam can realize surface modification treatment on the 304 stainless steel surface by direct writing pattern to form the special layer with anti-corrosive protection. By combining laser surface modification technology and micro electrochemical machining technology, the special layer generated by precision laser surface modification serve as mask layer in electrochemical micromachining to prevent dispersion corrosion, and the complex two-dimensional microstructure can be fabircated by using simple block electrode without photo-lithography, which overcome the defects of masking pattern by mask lithography and expensive cost, and the problems of fabricating a micro-electrode and the low efficiency of electrochemical micro-milling in electrochemical machining with ultra-short pulse. In the project, the process of laser phase transition and laser re-melting and laser surface alloying of stainless steel 304 in the the fine laser surface-modification are analyzed to study the mechanism of the role of the special mask play in the laser assisted electrochemical micromachining.