Transactions of Nanjing University of Aeronautics & Astronautics
Theoretical and Experimental Investigation of Laser Milling Assisted with Jet Electrochemical Machining
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Abstract:
In laser milling assisted with jet electrochemical machining (LMAJECM), the source of energy is a pulsed laser beam aligned coaxially with a jet of electrolyte, which focuses optical energy on the surface of workpiece. The impact of jet of electrolyte develops a state-of-art work to perform operations such as electrolytic etching, effective cooling, and transportation of debris. Therefore, a special jet cell is designed to obtain stable jet as to be a kind of noncontact tool, i.e., electrode. According to the theoretical model of on-off pulse time process, laser machining and electrolytic anodization are simulated by finite element analysis (FEA) method. Grooves on a 0.5 mm thick 321 stainless steel sheet produced by LMAJECM is performed with pulsed Nd:YAG laser at the second harmonic wavelength. Compared with laser milling under ambient atmosphere conditions, the recast layer and burrs are effectively diminished. And the accuracy of depth is dedicated to laser milling, whilst that of width is dominated by jet electrochemical machining. It is demonstrated that LMAJECM can be a highly potential approach for fabricating 3-D micro components.
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Project Supported:
the National Natural Science Foundation of China (51205212); the Natural Science Foundation of Jiangsu Province (BK2012233).
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