Flórez García Luis C, González Rojas Hernán A, Sánchez Egea Antonio J
Department of Mechanical Engineering, Universidad Tecnológica de Pereira, Risaralda 660003, Colombia.
Department of Mechanical Engineering (EPSEVG), Universitat Politécnica de Catalunya, 08800 Barcelona, Spain.
Materials (Basel). 2020 Jan 24;13(3):567. doi: 10.3390/ma13030567.
The objective of this work is to analyze the influence of the vibration-assisted turning process on the machinability of S235 carbon steel. During the experiments using this vibrational machining process, the vibrational amplitude and frequency of the cutting tool were adjusted to drive the tool tip in an elliptical or linear motion in the feed direction. Furthermore, a finite element analysis was deployed to investigate the mechanical response for different vibration-assisted cutting conditions. The results show how the specific cutting energy and the material's machinability behave when using different operational cutting parameters, such as vibration frequency and tool tip motion in the -axis, -axis, and elliptical (- plane) motion. Then, the specific cutting energy and material's machinability are compared with a conventional turning process, which helps to validate the finite element method (FEM) for the vibration-assisted process. As a result of the operating parameters used, the vibration-assisted machining process leads to a machinability improvement of up to 18% in S235 carbon steel. In particular, higher vibration frequencies were shown to increase the material's machinability due to the specific cutting energy decrease. Therefore, the finite element method can be used to predict the vibration-assisted cutting and the specific cutting energy, based on predefined cutting parameters.
这项工作的目的是分析振动辅助车削工艺对S235碳钢可加工性的影响。在使用这种振动加工工艺的实验过程中，调整了刀具的振动幅度和频率，以使刀尖在进给方向上做椭圆或直线运动。此外，还进行了有限元分析，以研究不同振动辅助切削条件下的力学响应。结果表明，在使用不同的切削操作参数（如振动频率以及刀尖在x轴、y轴和椭圆（xy平面）运动）时，单位切削能量和材料的可加工性表现如何。然后，将单位切削能量和材料的可加工性与传统车削工艺进行比较，这有助于验证振动辅助工艺的有限元方法（FEM）。由于所使用的操作参数，振动辅助加工工艺使S235碳钢的可加工性提高了18%。特别是，由于单位切削能量降低，较高的振动频率显示出可提高材料的可加工性。因此，基于预定义的切削参数，有限元方法可用于预测振动辅助切削和单位切削能量。
