Fernández-Osete Ismael, Estevez-Urra Aida, Velázquez-Corral Eric, Valentin David, Llumà Jordi, Jerez-Mesa Ramón, Travieso-Rodriguez J Antonio
Department of Mechanical Engineering, Universitat Politècnica de Catalunya, 08019 Barcelona, Spain.
Department of Mechanical Engineering and Manufacturing, Universidad de Sevilla, 41092 Sevilla, Spain.
Materials (Basel). 2021 Oct 1;14(19):5746. doi: 10.3390/ma14195746.
This paper focuses on a resonant system used to induce a low-amplitude movement and ultrasonic frequency to complement a ball burnishing process on a lathe. The system was characterized through the combination of different techniques. A full vibratory characterization of this process was undertaken with the purpose of demonstrating that the mechanical system-composed of the tool and the machine-does not present resonance phenomena during the execution of the operation that could lead to eventual failure. This dynamic analysis validates the adequateness of the tool when attached to an NC lathe, which is important to guarantee its future implementation in actual manufacturing contexts. A further aim was to confirm that the system succeeds in transmitting an oscillating signal throughout the material lattice. To this end, different static and dynamic techniques that measure different vibration ranges-including impact tests, acoustic emission measurement, and vibration measurement-were combined. An operational deflection shape model was also constructed. Results demonstrate that the only high frequency appearing in the process originated in the tool. The process was not affected by the presence of vibration assistance, nor by the burnishing preload or feed levels. Furthermore, the frequency of the assisting ultrasonic vibration was characterized and no signal due to possible damage in the material of the specimens was detected. These results demonstrate the suitability of the new tool in the vibration-assisted ball burnishing process.
本文聚焦于一种用于在车床上引发低振幅运动和超声频率以辅助滚珠研磨过程的共振系统。该系统通过不同技术的组合进行了特性描述。对这一过程进行了全面的振动特性分析，目的是证明由刀具和机床组成的机械系统在操作执行过程中不存在可能导致最终故障的共振现象。这种动态分析验证了刀具安装在数控车床上时的适用性，这对于确保其在实际制造环境中的未来应用至关重要。另一个目的是确认该系统成功地在整个材料晶格中传递振荡信号。为此，结合了测量不同振动范围的不同静态和动态技术，包括冲击试验、声发射测量和振动测量。还构建了一个运行挠度形状模型。结果表明，该过程中出现的唯一高频源自刀具。该过程不受振动辅助、研磨预载或进给水平的影响。此外，对辅助超声振动的频率进行了特性描述，未检测到因试样材料可能损坏而产生的信号。这些结果证明了新刀具在振动辅助滚珠研磨过程中的适用性。
