超声焊头的动力学分析与优化设计  

Dynamic Analysis and Optimization Design of Ultrasonic Welding Head

作　　者：闫照锋 魏永超 潘玉良 刘岩 王世杰 Yan Zhaofeng;Wei Yongchao;Pan Yuliang;Liu Yan;Wang Shijie(Luoyang E-Energy Storage and Transformation System Co.,Ltd.,Luoyang,Henan 471000,China)

机构地区：[1]洛阳储变电系统有限公司,河南洛阳471000

出　　处：《机电工程技术》2024年第10期188-191,共4页Mechanical & Electrical Engineering Technology

摘　　要：超声焊头是超声焊接系统的主要组成部分,其影响因素复杂多样,试验验证所需成本太大。为缩短研发周期、节约生产资金,通过运用SolidWorks建立6种超声焊头模型,分别进行动力学分析,包括模态仿真和谐响应分析,同时考虑约束和位移载荷等因素对其影响。通过有限元模拟,得到最优焊头结构,第二阶振型频率为20262 Hz,与焊接机固有频率偏差为1.3%,最大弯曲变形1.23μm发生在焊齿位置,与实际状态保持一致;谐响应分析中,最大应力323 MPa发生在焊头突变处,小于材料的屈服应力744 MPa;振幅最大33μm产生在焊齿处,放大系数高达6倍。因此,加工谐振频率20000 Hz超声焊头,通过生产电芯50万支电芯验证焊头可行性,为新产品超声焊头开发提供了一种新的途径和方法。Ultrasonic welding head is the main component of ultrasonic welding system.Factors influencing the head are complex and various,and test and verification is too costly.In order to shorten the R&D cycle and save production funds,six kinds of ultrasonic welding head models are established by using SolidWorks.Dynamic analysis including modal simulation and harmonic response analysis is carried out respectively considering the influence of constraint and displacement load.Through the finite element simulation,the structure of welding head is optimized,the second mode frequency is 20262 Hz,the deviation from the natural frequency of the welding machine is 1.3%.The maximum bending deformation of 1.23µm occurs at the welding teeth,which is consistent with the actual state.In harmonic response analysis,the maximum stress of 323 MPa occurs at the sudden change of the welding head,which is less than the yield stress of 744 MPa of the material.At the same time,the maximum amplitude 33µm is generated at the welding teeth,with an amplification factor of up to six times.The feasibility of the ultrasonic welding head with operating resonant frequency 20000 Hz is verified through the production of 500000 batteries,it provides a new way and method for the development of new ultrasonic welding head.

关 键 词：超声焊头 模态分析 仿真分析 谐响应分析 固有频率 

分 类 号：TB559[理学—物理] TH139[理学—声学]