THE EFFECT OF SLOT NUMBER IN WORKING PERFORMANCE OF A BLOCK-LIKE HORN USED IN PLASTICS ULTRASONIC WELDING

Abstract

A horn is an important part of the ultrasonic plastic welding system. The design characteristics of the horn will directly affect the quality of the weld. This study aims to analyze the influence of the number of slots in the two directions of the block-like horn on the working performance of the horn. Two analysis techniques are used such as modal and harmonic analysis. The finite element method is utilized to perform the two analysis steps mentioned above. The results show that under the direct influence of the Poisson effect, the use of longitudinal slots significantly improves the uniformity of the displacement on the working profile and reduces the maximum stress generated in the horn. In particular, the number of slots also has a direct influence on the uniformity of the profile, the spacing of the frequency separation and the maximum stress generated. The research results of this paper can be considered the first important results, aiming to orient the coming research on developing optimization methods for block-like horns with complex working profiles for industrial applications.