Electric Welding in Railway Shops

Electric Resistance Welding in the Aircraft Industries

Surface Welding as a Way of Railway Maintenance

Since its early days the development of railway systems has been an important driving force for technological progress. From the 1840s onward a dense railroad network was spread all over the world. Within a few decades railway became the predominant traffic system carrying a steadily increasing volume of goods and number of passengers. This rapid development was accompanied by substantial devel...

Evaluation of knowledge and usage of personal protective equipments by welding workers in Kerman door shops

In order to Investigate the knowledge and usage of personal protective equipments with 290 workers interviewed who were employed in 200 welding shops in Kerman. The data were recorded in a questionnaire. The results showed that in respect to personal protective equipments  31.4℅ had low knowledge, 50.3℅ medium knowledge and 18.3℅ good knowledge. Hand shieldwelding , safety goggles, clothes and ...

Cytotoxicity of electric spot welding: an in vitro study

Objective: The welding process involves metal ions capable of causing cell lysis. In view of this fact, the aim of this study was to test the hypothesis that cytotoxicity is present in different types of alloys (CrNi, TMA, NiTi) commonly used in orthodontic practice when these alloys are subjected to electric spot welding. Methods: Three types of alloys were evaluated in this study. Thirty-six ...

Modelling of Electrode-arc Coupling in Electric Arc Welding

Modelling of the arc in electric arc welding is significant to achieve a better process understanding, thus gain better weld quality and a more efficient production process. It requires knowing the conditions at the surfaces of the anode and cathode. These conditions are very difficult to set from measurements and should be calculated. This requires modelling the complex physics of the electrod...