This study aims to determine the variation of metal transfer on tensile strength, impact, hardness distribution, macrostructure, microstructure and chemical composition low carbon steel by GMAW welding method. The material used in this was AISI 1018 steel. welded using Variation globular arc, spray arc short welding. tests carried out included testing, impact macro-structural observations, micr...

Occupational asthma (OA) can be induced by fumes of manual metal-arc welding on stainless steel. In recent years, the use of special stainless steels (SSS) with high chromium content has increased. This study presents two cases of OA caused by manual metal-arc welding on SSS. In both cases, the diagnosis of OA was based on respiratory symptoms, occupational exposure and positive findings in the...

Visual sensing technology is widely used in welding practices because visual devices are decreasing in price, increasing in reliability and improving in image processing hardware and software. As the most studied welding sensor, CCD(Charge Coupled Device) is more suitable for quality control of welding process than other means of sensing devices because it can obtain both two dimensional and th...

Recently, the serious problems facing heavy industries such as the increase in the average age of employees, shortage of skilled workers and environmental problems in the workplace are being addressed. The bridge panel fabrication system we have developed is such an approach to solve these problems. It consists of two parallel box girder panel sub-assembly lines, one exclusively for web panels ...

Flux cored arc welding (FCAW) is applied due to its remarkable results and advantages (high productivity, joint quality etc) in various fields (industrial construction, naval, chemistry, petrochemistry etc.). FCAW disadvantages, mainly the emission of pollutants, can be counteracted by their rigorous control and local forced ventilation in the production. Control measures that can be used for m...

An effective and rigorous approach to determine optimum welding process parameters is implementation of advanced computer aided engineering (CAE) tool that integrates efficient optimization techniques and numerical welding simulation. In this paper, an automated computational methodology to determine optimum arc welding process control parameters is proposed. It is a coupled Genetic Algorithms ...

The primary issue of this research is to create an inverse neural network model for automatic welding parameter control. In this research, there have a new model of inverse radius basis function neural network (IRBFN) proposed, which is an indirect approach. The development processes first build a feed-forward radius basis function neural network (FRBFN), which learns the influence of the input...

A mathematical model is developed to describe the heat transfer and fluid flow in stationary keyhole plasma arc welding. Using the volume of fluid method, the processes of heating, melting, collapsing and subsequent solidifying in the molten pool are dynamically studied. The predicted results have been compared with the experimental weld and keyhole shape. Using the LaserStrobe video system, th...

A compound external magnetic field (EMF) can be used to prevent weld bead defects by controlling the metal transfer and arc behaviors during high-speed gas welding. unified model containing filler metal, arc, pool, EMF was established study effect of on welding process. The heat mass among pool under action numerically analyzed. simulation results showed that high-temperature region in molten r...

Industries involved in surfacing operations use various fusion welding especially arc welding processes. These operations demand high deposition rates but at low penetration values in the base metal. Conventional SAW, besides its high deposition characteristics, employs high values of welding current and is not many times favoured for surfacing due to high degree of dilution of surfacing alloys...