On Force–Displacement Characteristics and Surface Deformation in Piezo Vibration Striking Treatment
On Force–Displacement Characteristics and Surface Deformation in Piezo Vibration Striking Treatment
复制标题
压电振动冲击处理中的力位移特性和表面变形
DOI：
10.1115/1.4052932
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发表时间：
2022
期刊：
影响因子：
--
通讯作者：
Guo, Yang
中科院分区：
文献类型：
--
作者：
Chen, Jisheng;Xu, Yang;Sandoval, Juan;Kwon, Patrick;Guo, Yang
本文对一种新型的机械表面处理工艺--压电振动冲击处理(PVST)进行了实验研究，该工艺是由安装在计算机数控机床上的压电堆振动装置实现的。与其他基于敲击的表面处理不同，PVST采用非共振模式的压电式振动，在工件表面引发可控的刀具敲击。在本研究中，我们实现了一套PVST的实验装置。通过刀面逼近、单点冲击、一维扫描冲击和二维扫描冲击四种试验，研究了PVST过程中打击力、刀具振动位移和表面变形之间的关系。研究表明，在刀具振动的各个周期内，PVST都能诱发强度一致的冲击。打击强度和打击地点都可以很好地控制。这种加工能力特别体现在处理后表面的纹理和粗糙度上。此外，在PVST中还发现了两个线性的力关系。第一个线性关系是敲击力与敲击过程中振动幅度的减小之间的关系。第二个是在打击力和由罢工产生的永久压痕深度之间。这些线性的力关系为实现PVST的实时监测和力反馈控制提供了机会。这项研究是开发PVST作为一种更有效的基于变形的表面改性工艺的第一步。
This paper presents an experimental study on a novel mechanical surface treatment process, namely piezo vibration striking treatment (PVST), which is realized by a piezo stack vibration device installed on a computer numerical control (CNC) machine. Unlike other striking-based surface treatments, PVST employs non-resonant mode piezo vibration to induce controllable tool strikes on the workpiece surface. In this study, an experimental setup of PVST is implemented. Four types of experiments, i.e., tool-surface approaching, single-spot striking, one-dimensional (1D) scan striking, and 2D scan striking, are conducted to investigate the relationships among the striking force, tool vibration displacement, and surface deformation in PVST. The study shows that PVST can induce strikes with consistent intensity in each cycle of tool vibration. Both the striking intensity and striking location can be well controlled. Such process capability is particularly demonstrated by the resulting texture and roughness of the treated surfaces. Moreover, two linear force relationships have been found in PVST. The first linear relationship is between the striking force and the reduction in vibration amplitude during striking. The second one is between the striking force and the permanent indentation depth created by the strike. These linear force relationships offer the opportunity to realize real-time monitoring and force-based feedback control of PVST. This study is the first step toward developing PVST as a more efficient deformation-based surface modification process.