Gas welding and cutting oxyfuel welding, commonly referred to as oxy welding or gas welding is a process of joining metals by application of heat created by gas flame. Courses fundamental of welding science and technology. This flame directly strikes the weld area and melts the weld surface and filler material. Fundamentals of gas cutting and welding ced engineering. The melted part of welding plates diffused in one another and create a weld joint. As per our records you have not submitted this assignment. Fundamental of welding science and technology video. In gas metal arc welding mig which of the following polarity is generally used. Nptel syllabus marine construction and welding video course course outline. In plastic welding or pressure welding, the pieces of metal to be joined are heated to plastic state and then forced together by external pressure. For successful application of welding to produced sound weld joints, it is utmost important to understand the science and technology behind the welding. In many welding processes, electrical power is the source of thermal energy, so there is the hazard of electrical shock to the worker.
Nptel syllabus welding engineering web course course outline welding is one most the most commonly used fabrication techniques. Gas welding is a most important type of welding process. Fusion welding in fusion welding or non pressure welding, the material at the joint is heated to molten state and allowed to solidify. The cylinder colour of acetylene gas cylinder used in oxyfuel gas welding is. Most of the processes use high energy to cause melting of the part surfaces to be joined. The fuel gas commonly acetylene, when mixed with proper proportion of oxygen in a mixing chamber of welding torch, produces a very hot flame of about 57005800f. The process uses shielding from an externally supplied gas to protect the molten weld pool. In oxy acetylene gas welding, temperature at the inner cone.