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flash butt weldingthis process is an extension of resistance butt welding the parts to be joined are gripped in the clamps and their interfaces are
projection welding this is a modified method of making single or multiple spot welds projection welds are made by providing an embossment or
resistance seam weldingthis is similar to spot welding except that the copper alloy electrodes are in the form of circular rollers the overlapping
resistance spot weldingin this process a spot of weld is made between overlapping sheets by means of two cylindrical copper alloy electrodes one on
resistance weldingthe types are as followsresistance spot weldingresistance seam weldingprojection weldingflash butt weldingflash butt weldingstitch
flux shielded arc weldingthis process is popularly known as submerged arc welding sawthis is a fully mechanised welding process the electrode is a
flux cored arc welding fcawthis is a variation of gmaw where solid wire is replaced by flux cored wire the equipments and accessoriesare the same
co2 weldingco2 welding is a variation of gmaw here the inert gas is replaced by gas mixtures or carbon dioxide which are chemically active the carbon
gas metal arc welding gmawgmaw is abbreviation for gas shielded metal arc welding here fusion is achieved by an electric arc formed between work
gas tungsten arc welding gtawgas tungsten arc welding gtaw is popularly known as tungsten inert gas welding tig in this process an arc is struck
shielded metal arc welding smawit also known as manual metal arc welding mmaw the heat required for welding is generated by the electric arc formed
brazingbrazing is a group of welding processes which produces coalescence of materials by heating them to a specific temperature and by using a
solderingthis is a group of join process which generates coalescence of materials by heating them to a suitable temperature and by using a filler
classification based on mode of weldingmanual welding in this welding the entire welding operation is performed and controlled by hand here there are
classification based on type of welding fusion welding these processes involve fusion of the base metal to complete the weld fusion welds
classification of welding based on mode of energy transferenergy is converted from one form to another any form of energy can be converted to heat
10 introductionwelding is a material joining process used in making welds and a weld is a localised coalescence of metals or non
welding is a material joining process used in making welds and a weld is a localised coalescence of metals or non metals produced either by heating
introduction to welding processeswelding is a material joining process used in making welds and a weld is a localised coalescence of metals or non
static electricity in aircraftas mentioned earlier the effects of static electricity are of considerable importance in the design of aircraft and
a system consisting of 2kg of r-134a undergoes a cycle composed of the following processes process 1-2 constant volume from p1 10 bar x106 to
fuel system inhibiting the fuel used in turbine engines usually contains a small quantity of water which if left in the system could cause corrosion
engine firesthere are two main types of engine fire that can occur when running gas turbine engines and they are dealt with in different ways1 fire
re-heat after burningre-heat is a system fitted to a gas turbine engine as a means of increasing the total thrust as much as twice the thrust can be
external air tappingsengines vary as to the number of external air tappings and their usage the following notes are taken from the pratt and whitney