Various welding methods are used to produce non-detachable joints of plastic parts. These friction (FW), friction-stir (FSW), ultrasonic welding, chemical bonding, and hot plate welding. Rotary (RFW) method, which is one the FW methods, generally in joining filter parts water treatment devices. After RFW processes, semi-melted accumulations tend occur on interior surfaces In some cases, particl...

The determination of quality parameters of resistance spot weld in real time is of great importance in today’s industry. Acoustic waves can solve this problem in the sense of measuring certain features directly related to the weld quality – degree of heating of the weld zone, moment of beginning of melting and some others. The ultrasonic transducer incorporated into an electrode sends short aco...

The objective of this study was to characterize personal exposures to welding-related metals and gases for production welders and non-welders in a large manufacturing facility. Welding fume metals and irritant gases nitrogen dioxide (NO2) and ozone (O3) were sampled for thirty-eight workers. Personal exposure air samples for welding fume metals were collected on 37 mm open face cassettes and ni...

Abstract The formation of a reliable joint between large number aluminum strands for battery applications is crucial in automotive industry, especially the technology autonomous vehicles. Therefore, this study, mechanical deformations and diffusion patterns mating interface ultrasonic welding were investigated using molecular dynamics simulations. Furthermore, microscopic observations joints fr...

The purpose of this study is to evaluate ultrasonic suture welding of monofilament suture in an animal model of rotator cuff repair with biomechanical and histologic analyses. We randomly assigned 46 shoulders in 23 rabbits to 1 of 3 treatment groups: sham-operated (n = 15), knotted (n = 15), and welded (n = 16). Supraspinatus defects were surgically created and acutely repaired with suture anc...

A new model-based approach for ultrasonic phased-array testing of dissimilar welds based on the direct measurement of the wave speeds inside the real weld by using scanning laser vibrometry is presented. With this technique the interaction of different wave modes with the weld can be studied in detail leading to important consequences for the measuring set-up. Together with the geometry of the ...

Laser beam welding has wide acceptability due to least welding distortion, low labour costs and convenient operation. However, laser welding for dissimilar titanium and aluminium alloys is a new area which is having wider applications in aerospace, aircraft, automotive, electronics and other industries. The present study is concerned with welding parameters namely laser power, welding speed, fo...