基于超声振动加工的阶梯形变幅杆焊头设计与性能分析

Design and Performance Analysis of the Stepped Horn Welding Head Based on Ultrasonic Vibration Machining

超声变幅杆是超声振动复合加工工艺中超声振动系统的重要部件,在塑料超声波焊接加工中,常常把变幅杆与焊接工具设计在一起,即业内通俗说的超声波变幅杆焊头。该文结合实际应用情况,通过理论计算得到阶梯形变幅杆焊头的几何模型,并基于AnsysWorkbench分析软件对阶梯形变幅杆焊头进行模态分析和谐响应分析,获得了阶梯形变幅杆放大系数、截面突变处的过渡圆弧与最大应力的变化规律,为阶梯形复合变幅杆焊头的设计提供了参考,优化设计的阶梯形变幅杆焊头工作性能得到大幅度提升。

The ultrasonic horn is an important part of the ultrasonic vibration system in the ultrasonic vibration composite processing technology.In the plastic ultrasonic welding process,the horn and welding tools are often designed together,and that is commonly known as the ultrasonic horn welding head.Combined with the actual application situation,this paper obtains the geometric model of the stepped horn welding head through theoretical calculation,conducts the modal analysis and harmonious response analysis of the stepped horn welding head based on Ansys Workbench analysis software,and obtains the variation law of the amplification coefficient,transition arc at the abrupt change of cross-section and maximum stress of the stepped horn,which provides reference for the design of the stepped horn welding head.The working performance of the stepped horn welding head that is optimally designed has been greatly improved.