Abstract:
Based on the band gap theory of phononic crystals and coupled vibration theory, the coupling vibration and lateral vibration suppression of large-size rectangular ultrasonic plastic welding systems were investigated.By designing different size scatterers, the relationship between the transverse vibration band gap of the tool, the longitudinal resonance frequency of the tool, and the displacement of the radiating surface of the tool and the width and height of the scatterer were obtained.The results show that by reasonably designing the size of the scatterers in the tool of a typical phononic crystal structure, the transverse vibration of the tool in the welding system can be effectively suppressed at different working frequencies, and at the same time, the longitudinal vibration displacement of the welding tool surface increases and tends to homogenize, ensure the welding system works efficiently.
