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Deep-hole manufacturing is widely applied in the aerospace, transportation, and mineral mining industry. The axis deviation of deep-hole is a manufacturing challenge, especially in the small-diameter weak stiffness tool drilling process. This paper studies the parameter influence mechanism of deep-hole axis deviation in low-frequency vibration-assi...
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Machining free-form shaped surfaces is a widespread task. Aerospace, automotive, mould making and many other sectors are challenged by ever increasing demands for precision and economy. In ball-end milling, the constantly changing cutting conditions affect the shape and volume of the chip, as well as the tool load and the quality of the resulting s...
Citations
... Furthermore, previous research has mainly focused on dry machining and minimal quantity lubrication (MQL) for analyzing chip evacuation mechanisms. When deeper hole machining is required in the context of structural and mechanical components, dry or MQL cooling conditions are ineffective due to heat dissipation issues [32]. Therefore, powerful cooling conditions such as internal coolant are necessary. ...
This study examined the impact of vibration-assisted drilling (VAD) on hole quality and residual stress in Ti-6Al-4V ELI (Extra Low Interstitials) material. Ti-6Al-4V ELI possesses excellent mechanical properties but presents challenges in machining, including chip evacuation, burr formation, and elevated cutting temperatures. VAD, particularly low-frequency vibration-assisted drilling (LF-VAD), has been explored as a potential solution to address these issues. The research compares LF-VAD with conventional drilling (CD) under various cutting and cooling conditions. LF-VAD exhibits higher maximum thrust forces under specific conditions, which result in accelerated tool wear. However, it also demonstrates lower RMS (root mean square) forces compared to CD, offering better control over chip formation, reduced burr formation, and improved surface roughness within the hole. Furthermore, LF-VAD generates greater compressive residual stresses on the hole’s inner surface compared to CD, suggesting enhanced fatigue performance. These findings indicate that LF-VAD holds promise for improving the hole’s surface characteristics, fatigue life, and overall component durability in Ti-6Al-4V machining applications.
... Furthermore, previous research has mainly focused on dry machining and minimal quantity lubrication (MQL) for analyzing chip evacuation mechanisms. When deeper hole machining is required in the context of structural and mechanical components, dry or MQL cooling conditions are ineffective due to heat dissipation issues [29], and thus, stronger cooling conditions are required. Additional research is needed to understand the impact of LFVAD on such processing. ...
This study examined the impact of Vibration-Assisted Drilling (VAD) on hole quality and residual stress in Ti-6Al-4V ELI material. Ti-6Al-4V ELI possesses excellent mechanical properties but presents challenges in machining, including chip evacuation, burr formation, and elevated cutting temperatures. VAD, particularly Low-Frequency Vibration-Assisted Drilling (LF-VAD), has been explored as a potential solution to address these issues. The research com-pares LF-VAD with conventional drilling (CD) under various cutting and cooling conditions. LF-VAD exhibits higher maximum cutting forces under specific conditions, which result in accel-erated tool wear. However, it also demonstrates lower RMS (Root Mean Square) forces com-pared to CD, offering better control over chip formation, reduced burr formation, and improved surface roughness within the hole. Furthermore, LF-VAD generates greater compressive residual stresses on the hole's inner surface compared to CD, suggesting enhanced fatigue performance. These findings indicate that LF-VAD holds promise for improving hole quality, fatigue life, and overall component durability in Ti-6Al-4V machining applications.
