AUTOMATIC ARC WELDING MACHINE

Abstract

Safety in welding is a very important aspect. Welding is one of the most widely used metal fabrication methods in world wide. Welding is safe operation when carried out under normal and correct workshop conditions, but it must be pointed out that equipment free from defects and well arranged, properly ventilated , tidy workplace are important factors for safe working. Even though, welding is carried out widely across the world, when certain basic measures and precautions are not followed, it results in injuries, discomfort, loss of eye sight after a longer period, or sometimes even leading to death of the people work there. There are a large variety of welding and allied processes used in the modern industry. In general welding processes can be divided into the two basic categories, as fusion welding and solid-state welding. These processes differ in the manner with which heat, pressure or both are applied and the equipments used for the process. Shielded Metal Arc Welding (SMAW), Submerged Arc Welding (SAW), and Gas Metal Arc Welding (GMAW) account for 60-70% of welding activities in most of the industries. Its’ ease of operation, flexibility, and efficiency make welding a viable and attractive process in modern industries. Welding is one of the major processes in High Pressure Boiler Manufacturing Industries also. Here, modern welding machines are used to produce more productive and high quality Boiler components. Various processes of welding are adopted at High Pressure Boiler manufacture. In High Pressure Boiler Production, Tubular Production is the very important process, since it involves welding of tubular products where and iv steam at very high pressure and temperature of about 570 atmosphere and 600°C shall be circulating inside. The existing welding process of the Tubular Production and the environment in which the welders work in these machines are studied to bring out improvement in their working conditions.