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基于弯曲振动理论和耦合振动理论,设计了一种新型大尺寸筒形超声塑焊振动系统。该振动系统由纵向振动换能器及变幅杆、弯曲振动金属圆盘和耦合振动圆筒四部分组成。换能器和变幅杆的纵向振动驱动圆盘的二次弯曲模式振动,圆盘的二次弯曲模式振动激励圆筒的纵向模式振动,实现了工具头在较高频率下谐振。实验结果表明,振动系统的测试频率与计算频率比较符合,在大信号下测试的纵-弯-纵振动模式转换效果很好。研究结果为高频大尺寸超声焊接系统的设计提供了思路。
Based on the bending vibration theory and coupled vibration theory, a new type of large-size ultrasonic plastic welding vibration system is designed. The vibration system consists of longitudinal vibration transducer and horn, bending vibration metal disc and coupling vibration cylinder four parts. Longitudinal vibration of the transducers and horn drive the second bending mode vibration of the disk. The second bending mode of the disk vibrates the longitudinal vibration mode of the cylinder to achieve the resonance of the tool head at higher frequencies. The experimental results show that the test frequency of the vibration system is in good agreement with the calculated frequency, and the longitudinal-to-longitudinal vibration mode test under the large signal has a good effect. The research results provide the ideas for the design of high-frequency large-size ultrasonic welding system.