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Hole characteristics after drilling a titanium alloy: a study using plain drills and textured drills
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DOI:10.1080/10426914.2026.2682787.png)
Abstract
En 中文
This work examines the effect of plain drills and bionic (leaf-vein) textured twist drills on the drilling performance of chosen titanium alloy (Ti-6Al-4 V). Bio-inspired textures were created on flute surfaces through laser micromachining with aim of improving chip evacuation and reducing friction between tool and workpiece. Performance was evaluated on thrust force, oversize error, circumferential deformation layer and subsurface microhardness along the hoop direction. The results showed that the bionic textured drills consistently outperformed conventional plain drills. The modified flute geometry aided coolant penetration and facilitated smoother chip flow, which reduced material adhesion and margin wear. Although thrust force increased with rising cutting parameters for both drill types, the values remained comparatively lower for the textured tools and confirming their reduced frictional response. Overall, the study demonstrates that bionic flute texturing provides a practical and effective means to enhance drilling efficiency and hole quality during machining of chosen titanium alloy.
Keywords:
Bionic
texturing
circumferential deformed layer
oversize
microhardness
Journal
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