| Autor: |
Wang, Feng, Zhao, Jianshe, Qiang, Zhiming, He, Yafeng, Kang, Min, Tian, Zongjun |
| Předmět: |
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| Zdroj: |
International Journal of Advanced Manufacturing Technology; 1/8/2023, Vol. 124 Issue 3/4, p989-1001, 13p, 1 Color Photograph, 1 Black and White Photograph, 5 Diagrams, 2 Charts, 9 Graphs |
| Abstrakt: |
The micro-groove structure has attracted extensive attention in mechanical seals and cutting tools as an effective surface modification method. Electrochemical machining (ECM) is a non-contact machining method that can fabricate a large area of micro-grooves on difficult-to-cut metal materials. However, there are significant differences in the dissolution rate in different processing areas when multiple micro-grooves are processed simultaneously, resulting in poor machining accuracy and consistency of micro-grooves. In this work, a pulse-vibration ECM method was given to enhance the machining localization of parallel micro-grooves. The variation laws of flow velocity, void fraction, temperature rise, conductivity, and dissolution rate in different ECM methods were studied through the coupling simulation of the gas–liquid two-phase flow field, temperature field, and electric field. In addition, the effects of different flow modes and different ECM methods on the changes in groove width, groove depth, and cross-sectional profile of the micro-groove were studied based on experimental research. The results verified that combining a pulse-vibration ECM method and a flow-direction switching mode could significantly improve micro-grooves machining accuracy and consistency, the average groove width of micro-grooves processed by the combined method was 587 μm, and the groove width deviation was 8 μm. Moreover, compared with the die-sinking ECM, the average groove width of micro-grooves processed by pulse-vibration ECM was reduced by 13%, and the groove width deviation was reduced by 47%. Besides, the cross-sectional shape of the micro-groove contour gradually changed from a circular arc to a trapezoid. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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