Xia Senbin, Yin Ziqiang, Huang Cheng, Guo Yawen, Zhang Chao
State Key Laboratory of Precision Electronic Manufacturing Technology and Equipment, Guangdong University of Technology, Guangzhou 510006, China.
School of Electromechanical Engineering, Guangdong University of Technology, Guangzhou 510006, China.
Micromachines (Basel). 2023 Jul 15;14(7):1426. doi: 10.3390/mi14071426.
Elliptical vibration-assisted cutting (EVAC), one of the advanced micromachining methods, enables results not possible with traditional ultra-precision machining. It is considered to be one of the most viable options for manufacturing micro/nanostructured surfaces. However, it is difficult to control the elliptical locus with different tilt angles; therefore, previous studies have primarily focused on fixed locus and investigated the effects of the amplitude and frequency on machining performance. In addition, tilt angle is an important factor affecting the characteristics of EVAC. To maximize the cutting performance of EVAC, the cutting characteristics of EVAC with variations in tilt angle of elliptical locus are investigated. The mathematical model of elliptical trajectory based on different tilt angles is established via geometric analysis. The effects of the different tilt angle (0-180°) on cutting forces, chip formation, defect generation and surface roughness are observed and theoretically analyzed in microgroove experiments. The experimental results show that the tilt angle has a significant effect on the cutting force, chip formation, defects and surface roughness. The best cutting performance can be obtained at the tilt angle of 30°, while the worst is recorded at 90°. The results can provide a valuable reference for further comprehensive studies to maximize the cutting performance of EVAC.
椭圆振动辅助切削（EVAC）是先进的微加工方法之一，能够实现传统超精密加工无法达到的加工效果。它被认为是制造微纳结构表面最可行的方法之一。然而，控制具有不同倾斜角度的椭圆轨迹较为困难；因此，以往的研究主要集中在固定轨迹上，并研究了振幅和频率对加工性能的影响。此外，倾斜角度是影响椭圆振动辅助切削特性的一个重要因素。为了使椭圆振动辅助切削的切削性能最大化，研究了椭圆轨迹倾斜角度变化时椭圆振动辅助切削的切削特性。通过几何分析建立了基于不同倾斜角度的椭圆轨迹数学模型。在微槽实验中观察并从理论上分析了不同倾斜角度（0-180°）对切削力、切屑形成、缺陷产生和表面粗糙度的影响。实验结果表明，倾斜角度对切削力、切屑形成、缺陷和表面粗糙度有显著影响。在倾斜角度为30°时可获得最佳切削性能，而在90°时切削性能最差。研究结果可为进一步全面研究以最大化椭圆振动辅助切削的切削性能提供有价值的参考。
