Investigation of Two-Dimensional Ultrasonic Surface Burnishing Process on 7075-T6 Aluminum  

作　　者：Zhenyu Zhou Qiuyang Zheng Cong Ding Guanglei Yu Guangjian Peng Zhongyu Piao 

机构地区：[1]College of Mechanical Engineering,Zhejiang University of Technology,Hangzhou 310012,China [2]Key Laboratory of Special Purpose Equipment and Advanced Processing Technology,Ministry of Education and Zhejiang Province,Zhejiang University of Technology,Hangzhou 310012,China

出　　处：《Chinese Journal of Mechanical Engineering》2021年第1期224-240,共17页中国机械工程学报（英文版）

基　　金：Supportedby National Natural Science Foundation of China(Grant Nos.51675483,51705028);Fundamental Research Funds for the Provincial Universities of Zhejiang(Grant No.RF-A2019008);Foundations(Grant Nos.61409230606,EM2015042003).

摘　　要：A novel two-dimensional ultrasonic surface burnishing process(2D-USBP)is proposed.7075-T6 aluminum samples are processed by a custom-designed 2D-USBP setup.Parameter optimization of 2D-USBP is conducted to determine the best processing strategy of 7075-T6 aluminum.A uniform design method is utilized to optimize the 2D-USBP process.U〔3(133)and 4(72)tables are established to conduct parameter optimization.Burnishing depth,spindle speed,and feed rate are taken as the control parameters.The surface roughness and Vickers hardness are taken as the evaluation indicators.It establishes the active control models for surface quality.Dry wear tests are conducted to compare the wear-resistance of the 2D-USBP treated sample and the original sample.Results show that the machining quality of 2D-USBP is best under 0.24 mm burnishing depth,5000 r/min spindle speed,and 25 mm/min feed rate.The surface roughness of the sample is reduced from 2517.758 to 50.878 nm,and the hardness of the sample surface is improved from 167 to 252 HV.Under the lower load,the wear mechanism of the 2D-USBP treated sample is mainly abrasive wear accompanied by delamination wear,while the wear mechanism of the original sample is mainly delamination wear.Under the higher load,the accumulation of frictional heat on the sample surface transforms the wear mechanisms of the original and the 2D-USBP treated samples into thermal wear.

关 键 词：Two-dimensional ultrasonic-assisted burnishing Uniform design Regression analysis Wear behavior 

分 类 号：TG580.692[金属学及工艺—金属切削加工及机床]