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Improving performance of macro electrolyte jet machining of TC4 titanium alloy:Experimental and numerical studies

Chinese Journal of Aeronautics 2022年第8期35卷 280-294页

作者： Minglu WANG Ningsong QU College of Mechanical and Electrical Engineering Nanjing University of Aeronautics and AstronauticsNanjing 210016China

Electrolyte jet machining(EJM)is a promising method for shaping titanium alloys due to its lack of tool wear,thermal and residual stress,and cracks and ***,macro-EJM has attracted increasing attention for its high efficiency in machining wide grooves or ***,macro-EJM generates large amounts of electrolytic products,thereby increasing the difficulty of rapid product removal with a standard tool and reducing the surface ***,for enhanced product transport,a novel tool with a back inclined end face was proposed for macroEJM of TC4 titanium *** comparison,also proposed were ones with a standard flat end face,a front inclined end face,and both front and back inclined end *** flow field distributions of all proposed tools were simulated numerically,and experiments were also conducted to validate the simulation *** results show that one with a 5°back inclined end face can decrease the lowvelocity flow zone in the machining area and increase the high-velocity flow zone at the back end of tool,thereby promoting rapid product removal.A relatively smooth bright-white groove surface was *** same tool also resulted in the highest machining depth and material removal rate among the tested *** addition,rapid product removal was beneficial to the subsequent *** of its rapid product removal,the machining depth and material removal rate during deep groove machining using the tool with a 5°back inclined end face were respectively 7%and14%higher than those produced using a standard ***,the lowest bottom height difference of 0.027 mm can be obtained when the step-over value was 8.2 mm,and a plane with a depth of0.285 mm and a bottom height difference of 0.03 mm was fabricated using the tool with a 5°back inclined end face.

关键词： Electrochemical machining Macro electrolyte jet machining Product removal TC4 titanium alloy tool end structure

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