Research on Surface Forming Mechanism of Ultrasonic Vibration Assisted EDM
TC4 titanium alloy was used as workpiece material,and the formation mechanism of single pulse EDM pits was described by establishing a Gaussian heat source distribution model on the surface of the workpiece.In order to verify the accuracy of the model,the simulation and experimental verification were carried out.The results show that by analyzing the temperature field cloud diagram obtained by simulation and the data measured by experiment,it is found that the Gaussian heat source distribution model is consistent with them.After the introduction of ultrasonic vibration,the surface roughness is reduced by about 35%to 46%,the pits on the surface of the material are significantly reduced,and the surface morphology changes significantly.As the amplitude increases,the maximum value of the Gaussian heat source distribution curve decreases.The maximum temperature in the center of the temperature field decreases.The number of shallower surface pits increases.The area of a single pit increases.The surface roughness becomes better.
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