【摘要】 针对大尺寸圆柱体超声工具头焊接过程中振幅均匀度较低的问题，提出一种将表观弹性法和有限元法结合的工具头方法。通过Ansys对工具头进行了模态仿真，对工具头振幅均匀度进行了单因素谐响应仿真分析，利用激光测振仪测量了相同激励条件下改进前后工具头振幅，利用测力仪测量了改进前后工具头焊接样品断裂拉力。实验结果表明：工具头振幅分布趋势与仿真结果一致；开槽结构工具头焊接样品一致性要优于无开槽结构工具头；该方法设计工具头具有可行性。更多还原

【Abstract】 Aiming at the problem of low amplitude uniformity in the welding process of large-size cylindrical ultrasonic toolheads, a toolhead design method combining the apparent elasticity method and the finite element method was proposed.Through Ansys modal simulation of the toolhead, the toolhead amplitude uniformity was analyzed by single-factor harmonic response simulation analysis.The laser vibrometer was used to measure the toolhead amplitude under the same excitation conditions before and after the improvement.The force measurement instrument was used to measure the fracture tension of the toolhead welding samples before and after the improvement.The experimental results showed that the toolhead amplitude distribution trend and the simulation results were consistent.The consistency of the toolhead welding sample with slotted structure was better than that of the non-slotted toolhead.The method of designing of toolhead was feasible.更多还原