Abstract Vibration-assisted machining (VAM) is implemented in titanium alloy processing to solve some challenges, such as difficulty in chip breaking, large cutting forces, and high cutting temperatures. Based on the multi-region dynamic angles and the double-side wedge angle deformation mechanism, this study improves the vibration-assisted drilling (VAD) cutting forces and chip breaking model. The dynamic kinematics angles, the behavior of parameter influence, and the cutting strain effect of intermittent VAM are analyzed. VAD and conventional drilling (CD) experiments are carried out for model validation and mechanism analysis. The experiments show that the maximum deviation of the drilling forces simulation value and the experimental value is 9.13 %. Compared with the CD, the cutting force of the VAD is decreased by 10.1 %–46.2 %. The dynamic feed angle causes multiple cutting angles fluctuations, which affects cutting performance. The adjustment of the VAD cutting parameter value could reduce the chip length by 26.6 %–43.9 %. Material cutting strain presents multi-region characteristic, which influences the chip morphology. This study provides a reference for VAM parameter optimization.

中文翻译：

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钛合金Ti-6Al-4V振动辅助钻孔过程中动态角度和切削应变对切屑形态和切削力的影响

摘要 振动辅助加工（VAM）在钛合金加工中被应用，以解决断屑困难、切削力大、切削温度高等挑战。本研究基于多区域动态角和双侧楔角变形机制，改进了振动辅助钻削（VAD）切削力和断屑模型。分析了间歇VAM的动态运动学角度、参数影响行为和切削应变效应。进行了 VAD 和常规钻井 (CD) 实验以进行模型验证和机理分析。实验表明，钻孔力模拟值与实验值的最大偏差为9.13%。与 CD 相比，VAD 的切削力降低了 10.1%–46.2%。动态进给角引起多个切削角波动，影响切削性能。调整 VAD 切削参数值可使切屑长度减少 26.6%–43.9%。材料切削应变呈现多区域特性，影响切屑形貌。本研究为VAM参数优化提供参考。