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<p>This study addresses the challenges of chip evacuation difficulties, chip clogging, and poor hole wall quality in small-diameter deep-hole drilling of titanium alloys. We investigate the chip-breaking effectiveness and machining quality in TC4 titanium alloy deep-hole drilling using vibration-assisted technology. A one-factor experimental design systematically examined the effects of vibration modes (conventional drilling [CD], ultrasonic-assisted drilling [UAD], and low-frequency vibration-assisted drilling [LFVAD]) and cutting parameters (spindle speed, feed rate, and amplitude) on chip morphology and hole quality. Experimental results indicate that LFVAD can effectively break chips and improve chip removal. Compared with CD, LFVAD reduced hole wall surface roughness (Ra) by 60.41%, decreased hole diameter deviation by 59.23%, and significantly improved surface morphology. Based on the orthogonal experimental analysis, the optimal parameter range for titanium alloy deep-hole drilling was determined as follows: spindle speed of 1600–1800 r/min, feed rate of 40&#xa0;mm/min, and amplitude of 0.10–0.15&#xa0;mm. This study’s results demonstrate that LFVAD imparts substantial machinability advantages, thereby validating its potential as a robust technique for deep - hole drilling of hard - to - machine alloys.</p>

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Research on characteristics and hole quality of vibration-assisted deep hole drilling in titanium alloy

  • 期刊论文

  • 发表日期：

    2026年1月26日

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  • Xuezhi Wang,
  • Lianxin Zhou,
  • Na Liu,
  • Na Yuan,
  • Xiaoguang Li,
  • Qijia Wang,
  • Shujuan Ma,
  • Minghai Wang

摘要

This study addresses the challenges of chip evacuation difficulties, chip clogging, and poor hole wall quality in small-diameter deep-hole drilling of titanium alloys. We investigate the chip-breaking effectiveness and machining quality in TC4 titanium alloy deep-hole drilling using vibration-assisted technology. A one-factor experimental design systematically examined the effects of vibration modes (conventional drilling [CD], ultrasonic-assisted drilling [UAD], and low-frequency vibration-assisted drilling [LFVAD]) and cutting parameters (spindle speed, feed rate, and amplitude) on chip morphology and hole quality. Experimental results indicate that LFVAD can effectively break chips and improve chip removal. Compared with CD, LFVAD reduced hole wall surface roughness (Ra) by 60.41%, decreased hole diameter deviation by 59.23%, and significantly improved surface morphology. Based on the orthogonal experimental analysis, the optimal parameter range for titanium alloy deep-hole drilling was determined as follows: spindle speed of 1600–1800 r/min, feed rate of 40 mm/min, and amplitude of 0.10–0.15 mm. This study’s results demonstrate that LFVAD imparts substantial machinability advantages, thereby validating its potential as a robust technique for deep - hole drilling of hard - to - machine alloys.