Removal Mechanism of Titanium Alloy Material in Ultrasound Vibration Drilling

Abstract

In drilling the ultra-slim small diameter deep hole of titanium alloy, the problem of chip breaking and chip removal is common. When the drill is working normally, the ultrasonic vibration can be applied for the drill bit to cut the bit in the vibration to form a pulse. The cutting force waveform in drilling, should select the reasonable vibration frequency, amplitude, feed amount, workpiece rotation and other parameters to match, control the size and shape of the chip, get satisfactory chips, and avoid chip clogging. In this study, the ANSYS finite element simulation software was used to simulate the TC4 drilling process, and the difference between ultrasonic vibration drilling and ordinary drilling was analyzed. Drilling experiments were carried out. The experimental results show that compared with conventional drilling, ultrasonic vibration drilling has better surface quality, reduced tool wear and increased material removal rate.

Surface Characteristics and Residual Stress Variation in Semi-Deep Hole Machining of Ti6Al4V ELI with Low-Frequency Vibration-Assisted Drilling

“…Vibration-assisted drilling (VAD) technology refers to the integration of axial tool vibration with conventional drilling (CD) to enhance cutting performance. It is categorized based on vibration frequency, with frequencies exceeding 20,000 Hz classified as ultrasonic vibration-assisted drilling (UVAD) [20,21]. If the frequency is generally above 1000 Hz, it is known as high-frequency vibration-assisted drilling (HF-VAD), and when it is below 1000 Hz, it is referred to as low-frequency vibration-assisted drilling (LF-VAD) [22][23][24].…”