Brazing: Brazing is a metal joining processes, which is done by using the filler metal. It is heated above the melting point and distributed between two or more fitting parts by capillary action. Types of brazing: Torch brazing: In this technique filler material is melted by using oxyacetylene flame Dip Brazing: By creating molten liquid bath of filler material, it can be

Tungsten Arc Welding: The tungsten arc welding technique is used for the welding of aluminum, magnesium and its alloys. Arc is generated between the non-consumable tungsten electrode and the work piece material. For welding of 5mm thickness material there is no requirement for the supply of the filler material, and the joints can be produced by melting the base material

Laser beam welding: Atoms are pumped into a closed container using xenon lamp to high energy levelThis high energy atoms releases the energy in the form of photons through the reflecting Surfaces that receive large amount of light rays, which come with different phases, with different wavelengths convert into a single monochromatic coherent light rays. This is focused onto the

Thermit welding: For welding of high thickness materials this technique can be preferred. Thermit mixture is initially heated upon 1200 by using the magnesium ribbon or rods. At this temperature, thermit reaction takes place and releases 3MJ/ mole The heat release will be utilized to melt the material as this enters into the gap between the two work pieces, and

Fore hand: Welding torch moves from right to left. During the process inner core heats the base material at the joint, and the outer blue flame preheats the unwanted portion. Due to this difference, the temperature at the welding region and un-welding region can be reduced. With this stress developed in the weld joint region can be minimized. Back hand:

Primary reaction: Secondary Reaction: While burning the acetylene in the presence of . Due to the exothermic reaction heat is released, which is useful for melting of the material to produce a fusion joint For complete combustion of 1 mole of acetylene 2.5 moles of oxygen is required in which one mole is supplied from oxygen cylinder and 1.5 moles

Metal inert gas welding: For welding of high thickness materials, that are made up of Al, Mg, Cu and its alloys are used for maintenance in aero scope, automobile and spacecraft industries. Arc is generated between a consumable electrode which is in the form of wire and the work piece By continuously feeding the electrode material gap between the work

Welding is a process in which, the localized coalescence is produced by heating the material upto suitable temperature with or without application of filler material. Types of welded joint: Butt joint Lap joint Corner joint Tee joint Edge joint According to the position of welded joints: Flat joint Vertical joint Horizontal joint Overhead joint Terms used in the Welding Base

Welding is a process of joining two similar or dissimilar materials with the application of heat and also with or without the application of pressure and filter material. In the other cases the joining are also done with the help of nuts and bolts. Heat must be supplied in the form of electricity or gas torch. In this process gaps

Welding process is used to join the metals permanently. In the welding process we can join more than two metal pieces to act as a single section. In many countries mare than 50% of the industrial gross products are related to the welding process only. There are various welding processes. Sometime the welding process produces sparks and some other does