Welding process ppt

A Vocational Training Presentation on Welding From SIMPLEX CASTING LTD. Classification of welding processes : (i). Impurities or foreign substances which are forced into the weld puddle during the welding process.

Introduction OAW is a welding process that heats the base metal with a controlled mixture of acetylene and oxygen gas. The heat from the torch allows for the melting and mixing of the base metal and filler metal to form a solid weld. MMA (Manual Metal Arc) process for steam, power plants, backing rings are rarely used for piping in oil refineries and chemical plants.

Before 19th century there was mainly one type of welding that is forge welding which was mostly preferred by blacksmiths after that arc welding and oxy-fuel welding. Process Welding offers entire contract solutions but also smaller solutions such as crew hiring, small and large production solutions, advice and design from our professional engineering department and much more. The welding process involves applying heat and pressure to the materials being joine in addition to a filler material, in order to create a weld pool which cools to form a strong joint. Allow cooling period before touching welded metal Wear protective gloves and clothing Magnetic fields from high currents can affect pacemaker operation. Flying metal can injure eyes.

Unsubscribe from Auto Mech? TIG Welding Aluminum Fabrication - Sheet Metal Forming - Ovals into Round - Y-pipe - Duration: 18:26. Presentation Summary : Gas Welding (Oxy-acetylene) A number of welding processes use a flame produced by burning a mixture of fuel gas and oxygen.

It affords greater control and improves weld quality by using a nozzle to focus the electric arc,. Welding Safety Welding , by its very nature, has the opportunity to injure those actively engaged. Methods used and environment in which used should be evaluated to determine and remedy potential hazards. The only purpose of a welding rod is to supply filler metal to the joint.

This type of filler metal is often used for gas welding. In electric-arc welding , the term electrode. There are many variations of the arc- welding process. Other fusion- welding processes.

Certain arc and oxyfuel processes are also used for cutting metals. After triggering the welding process , the stud is accelerated by a spring to the plate surface. If there is contact between the ignition tip on the work piece, the process continues as described above. Our discussion of welding will focus on metals. Its commercial and technological importance derives from the following: 1- Welding provides a permanent joint.

Gas metal arc welding (GMAW), sometimes referred to by its subtypes metal inert gas (MIG) welding or metal active gas (MAG) welding , is a welding process in which an electric arc forms between a consumable wire electrode and the work piece metal(s), which heats the work piece metal(s), causing them to melt and join. The best description in a comparison point of view is a bicycle brake cable that has a wire running through that feeds continuously to the joint. The process of welding doesn't merely bond the two pieces together as in brazing and soldering, but, through the use of extreme heat and sometimes the addition of other metals or gases, causes the metalic structures of the two pieces to join together and become one.

Welding is a relatively new process (Historical Note 2).

The purpose of the Welding Handbook for maritime welders is to provide guidance in modern welding and related processes and to provide the welder with a source of practical information on the right solution to specific onboard welding problems. The defect may differ from the desired weld bead shape, size, and intended quality. Welding defects may occur either outside or inside the weld metal.