Transactions of Materials and Heat Treatment

Title：Research on process parameters of multi-pin ultrasonic shot peening sizing

Authors： Wang Zhihui1 2 Ma Qingxiao2 Li Ronghe2 Zhang Qinglong2 Zhao Su2

Unit： 1.Faculty of Mechanical Engineering and Mechanics Ningbo University 2.Ningbo Institute of Materials Technology and Engineering Chinese Academy of Sciences

KeyWords： ultrasonic shot peening sizing shot peening strength firing pin impact velocity air pressure firing pin stroke ultrasonic amplitude

ClassificationCode：TG668

year,vol(issue):pagenumber：2022,47(12):129-134

Abstract：

To improve the working efficiency and controllability of ultrasonic shot peening sizing process, the shot peening process parameters of the self-researched 65-pin ultrasonic shot peening sizing device were studied, and the influence laws of air pressure, firing pin stroke and ultrasonic amplitude on shot peening strength were analyzed by orthogonal test method. Results show that for Almen test piece, the maximum height of sizing arc obtained is 1.073 mm under the air pressure of 0.65 MPa,the ultrasonic amplitude of 25.6 μm and the firing pin stroke of 1 mm, and the maximum shot peening strength is obtained under this composition. In addition, the shot peening strength is positively correlated with the ultrasonic amplitude and the air pressure, and negatively correlated with the firing pin stroke. Furthermore, the process parameter that has the greatest impact on the bending deformation of thin-walled parts is ultrasonic amplitude, followed by the firing pin stroke, and the air pressure has the least impact. Finally, the influence laws of shot peening process parameters on impact velocity of firing pin are studied by the established detection system, and the results are consistent with that of orthogonal test.

Funds：

宁波市“3315”创新团队(Y80929DL04);宁波市科技创新“2025”重大专项(2018B10059)

王志晖（1997-），男，硕士研究生 E-mail：18370266642@163.com 通信作者：赵夙（1981-），男，博士，研究员 E-mail：zhaosu@nimte.ac.cn

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