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所属单位：机电学院

发表刊物：INTERNATIONAL JOURNAL OF REFRACTORY METALS & HARD MATERIALS

关键字：Electrochemical micromachining Tungsten Microtool Variable cross-section Online adjustment

摘要：Tungsten tools are used in various advanced manufacturing industries owing to their excellent physical and mechanical properties. However, the material characteristics of tungsten, such as its hardness and brittleness, make it difficult to fabricate tungsten microtools using mechanical methods. Electrochemical micromachining (ECMM) is a potential method for machining tungsten microstructures, because the process is independent of the material physical and mechanical properties. In this paper, an investigation into ECMM of tungsten microtools using a rotary helical electrode is presented. The optimal process conditions, including electrolyte concentration, duty ratio, and frequency of pulsed voltage, are determined experimentally. A quantitative relation between the machining side gap and the applied voltage and electrode feed rate, which can be controlled online during the machining process, is calculated from the experimental results. A contour map is drawn to aid in selecting the optimum process parameters to achieve a specific slit width. Finally, a tungsten array microtool with variable cross-section is fabricated by adjusting the applied voltage online.

ISSN号：0263-4368

是否译文：否

发表时间：2018-02-01

合写作者：Qi, Xinxin,朱荻

通讯作者：房晓龙