A preliminary study on improving surface finish of electron beam melted Ti-6Al-4V using piezo vibration striking treatment
A preliminary study on improving surface finish of electron beam melted Ti-6Al-4V using piezo vibration striking treatment
复制标题
压电振动冲击处理提高电子束熔炼Ti-6Al-4V表面光洁度的初步研究
DOI：
10.1016/j.mfglet.2022.07.059
复制
发表时间：
2022
影响因子：
3.9
通讯作者：
Guo, Yang
中科院分区：
文献类型：
--
作者：
Chen, Jisheng;Xu, Yang;Kwon, Patrick;Guo, Yang
采用压电振动冲击处理技术（PVST）对电子束熔化Ti-6Al-4V表面光洁度进行了改善实验研究，PVST是一种新型的机械表面处理工艺，由安装在数控机床上的非谐振压电堆叠振动装置实现。研究了不同工艺参数（啮合距离、刀具直径、振动频率和驱动电压）对增材制造零件表面光洁度的影响。结果表明，PVST处理后的表面纹理可分为两种模式：由分散的处理区和未处理区组成的分散模式和均匀模式，均匀处理区覆盖整个表面。刀具与工件表面负接触距离下的压缩型和滑动型变形对提高工件表面光洁度、使表面纹理由散乱型向均匀型转变起着重要作用。控制刀具与工件接触面积的刀具直径与表面光洁度正相关，而控制刀具振动幅值的驱动电压与表面光洁度负相关。通过振动频率和扫描速度控制压痕重叠对表面光洁度影响不大。©2022制造工程师协会。Elsevier Ltd.出版。版权所有。
This paper presents an experimental study on surface finish improvement for electron beam melted Ti-6Al-4V using piezo vibration striking treatment (PVST), a novel mechanical surface treatment process realized by a non-resonant piezo stack vibration device installed on a CNC machine. Various experiments with different process parameters, ie, engagement distance, tool diameter, vibration frequency, and driving voltage, are performed to explore their effects on surface finish of the additively manufactured parts. The results reveal that surface texture after PVST can be divided into two patterns: scattered pattern consisting of scattered treated and untreated areas and uniform pattern with uniform treated areas covered throughout the surface. The compression-type and sliding-type deformation under negative engagement distance between the striking tool and workpiece surface plays an important role in enhancing the surface finish and transforming surface texture from scattered pattern to uniform pattern. Tool diameter, controlling contact area between the tool and the workpiece, is positively correlated with surface finish while driving voltage, controlling vibration amplitude of the tool, is negatively correlated with surface finish. Overlap of indentations controlled by vibration frequency and scan speed has little influence on the surface finish.© 2022 Society of Manufacturing Engineers (SME). Published by Elsevier Ltd. All rights reserved.