Gas Metal Arc Welding (GMAW) processes is an important joining process widely used in metal fabrication industries. This paper addresses modeling and optimization of this technique using a set of experimental data and regression analysis. The set of experimental data has been used to assess the influence of GMAW process parameters in weld bead geometry. The process variables considered here inc...

Welding fume contains various metals and pulmonary effects from their inhalation are largely unknown. We have studied the effects of exposure to welding fume in sheep. The animals were exposed to either a bolus dose of welding fume solution or to five weeks daily exposure. Lung physiology parameters were studied and biopsies taken. Magnetopneumography was used to register the longterm exposure....

Laser welding has been considered as a promising method to join sintered NdFeB permanent magnets thanks to its high precision and productivity. However, the influences of laser welding on the magnetic property of NdFeB are still not clear. In the present paper, the effects of laser power on the remanence (Br) were experimentally investigated in laser spot welding of a NdFeB magnet (N48H). Resul...

Skin cancer caused by ultraviolet (UV) radiation has risen to prominence in the occupational disease sector. When establishing the work-related preconditions for recognition of occupational diseases, it is important to investigate of the sick person’s exposure to UV radiation. Employees engaged in welding work in particular may be exposed to a high level of UV radiation. Although it is possible...

The overall aim of this paper is to determine optimum position of welding point and number of spot welding in the structure to obtain good characteristics of vibration and noise. For this purpose, two kinds of loss factor were adopted. One is loss factor of sub structure, another is structural loss factor based on the complex welded or assembled structure. Using these two parameters, it is poss...

N. Ratković, Faculty of Engineering, University of Kragujevac, Kragujevac, Serbia. R. Nikolić, Faculty of Civil Engineering, University of Žilina, Žilina, Slovakia. I. Samardžić, University of Osijek, Mechanical Engineering Faculty in Slavonski Brod, Croatia. Fundamental principles of friction welding of dissimilar steels (high speed and tempering steel) from the aspect of metallurgical and che...

Abstract: The thermo-elastic fracture problem and equations are established for aluminium alloy Metal Inert Gas (MIG) welding, which include a moving heat source and a thermoelasticity equation with the initial and boundary conditions for a plate structure with a crack. The extended finite element method (XFEM) is implemented to solve the thermo-elastic fracture problem of a plate structure wit...

Although great strides continue to be made in the research community, the flexibility and judgment of a human welder has yet to be transferred successfully to a mechanical system. Automatic and robotic welding systems are capable of preprogrammed control of the welding parameters and manipulation of the welding torch motion and orientation. Recently, vision-based systems designed for tracking t...