Experimental Research on Controllable Vibration Assisted ECM of Deep Narrow Grooves of Titanium Alloy

To improve the ECM accuracy of deep narrow grooves of TB6 titanium alloy, the distributions of current densities and electrochemical dissolution rates of deep narrow groove side-walls in different machining modes were studied based on electric field simulation.Then, a comparative study of 3 kinds of machining modes including continuous feed, vibrating feed, coupling of pulse and vibration were carried out by experiments.The experimental results show that, when the vibration frequency and the continuous feed rate are fixed, the standard deviation of the groove widths may be significantly reduced by increasing the vibration amplitude, and further the machining consistency of the deep narrow grooves is improved; when the continuous feed rates are the same, the average groove widths and standard deviation of groove widths are both smaller by adopting the coupling of pulse and vibration mode, and the machining accuracy is higher.Moreover, the average entrance groove widths of 2.62 mm, the average groove widths along the depth direction of 2.73 mm, the entrance groove width standard deviation of 0.05 mm, and the groove width standard deviation along the depth direction of 0.03 mm may be obtained by using the coupling of pulse and vibration mode. © 2019, China Mechanical Engineering Magazine Office. All right reserved.