A probe into multi-physics coupling in electrochemical machining process of square holes in titanium alloys

作者：He Ya Feng; Lu Wen Zhuang^*; Gan Wei Min

来源：Journal of South China University of Technology(Natural Science Edition), 2016, 44(5): 110-116.

DOI：10.3969/j.issn.1000-565X.2016.05.017

• Electrochemical machining
• Gas
• liquid two-phase flows
• Interaction process
• Multi-physics couplings
• Physical parameters
• Processing quality
• Research object
• Square holes

In order to further improve the quality and precision of electrochemical machining, by taking the machining of square roles in titanium alloys as the research object, firstly, a multi-physics coupling mathematical model describing the electrochemical machining of square holes is established, which fully takes into consideration the mutual relationship among electric field, flow field and temperature field. Secondly, the distributions of square role's multi-physics coupling electrochemical machining potential, machining depth, flow velocity, bubble ratio and temperature gradient are obtained via numerical simulations. Then, the variations different physical parameters with time are discussed. Finally, electrochemical machining experiments of square holes in titanium alloys are carried out, and the influence of electrolyte inlet pressure on processing quality is investigated. The results show that(1) electrochemical machining is an interaction process of electric field, flow field and temperature field;(2) the measured square role contour accords well with the theoretically-calculated one;and (3)with the increase of processing time, the machining depth and cone angle become larger, the flow rate in the processing area decreases, while the bubble rate as well as the temperate gradient increases.

• 出版日期2016
• 单位南京航空航天大学