超声辅助冲击强化装置及复合变幅杆优化设计  

Ultrasonic Assisted Impact Strengthening Device and Optimal Design of Composite Horn

作　　者：张静松 董志国[1,2] 白小云 轧刚[1,2] ZHANG Jing-song;DONG Zhi-guo;BAI Xiao-yun;YA Gang(School of Mechanical and Engineering,Taiyuan University of Technology,Shanxi Taiyuan030024,China;Shanxi Provincial Key Laboratory of Precision Machining,Shanxi Taiyuan030024,China)

机构地区：[1]太原理工大学机械工程学院,太原山西030024 [2]精密加工山西省重点实验室,太原山西030024

出　　处：《机械设计与制造》2020年第4期50-53,共4页Machinery Design & Manufacture

基　　金：山西省自然科学基金(201701D121074)。

摘　　要：基于超声喷丸原理设计制作了利用伺服系统进行数控进给的旋转辅助超声冲击强化装置;利用波动方程和传统复合变幅杆设计理论,设计了圆锥复合变幅杆,用ANSYS软件对其进行了模态分析、谐响应分析和动力学分析。用该装置对镁合金试件表面进行冲击强化试验。结果表明,旋转辅助有利于提高试件表面冲击覆盖率;经ANSYS分析优化后的变幅杆结构合理,阻抗分析结果显示振动性能较好;在输入端直径相同的情况下,放大系数和最大应力值随着变幅杆过渡段长度的增大而不断减小。Based on the principle of ultrasonic shot peening,a rotary ultrasonic peening strengthening device for NC feed by servo system was designed and manufactured.Based on the wave equation and the traditional composite horn design theory,a conical compound horn is designed.Modal analysis,harmonic response analysis and dynamic analysis are carried out by using ANSYS software.An impact strengthening test on the surface of a magnesium alloy specimen is carried out with this device.The results show that the spin assist is helpful to improve surface coverage.The structure of the optimized horn is reasonable after ANSYS analysis,and the impedance analysis results show that the vibration performance is better.When the input diameter is the same,the amplification coefficient and the maximum stress decrease with the increase of the length of the transition section of the horn.

关 键 词：旋转辅助超声冲击 圆锥复合变幅杆 有限元分析 优化设计 

分 类 号：TH16[机械工程—机械制造及自动化] TH161