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equipment for resistance welding-stored energy equipments energy can be stored and further utilised for weldingone method of storing energy is in
equipment for resistance weldingthe equipment for resistance welding is different from that for arc welding for the following reasons resistance
effect of parameters in flash butt weldingflashing feed rate if excessive there is a probability of the parts freezing together without welding if
advantage of flash butt welding1 higher weld strength2 higher production rate3 better heat concentration4 simple weld surface preparation5 wide range
flash butt welding-flashingthe phenomenon of flashing is of extreme importance in achieving satisfactory welds flashing can begin only after a molten
flash butt weldingthe two pieces to be welded are pressed against each other by applying a pressure to whatever finish the faces are machined there
projection weldingprojection welding is similar to spot welding but for the fact that the welding takes place at the projections on the surface of
applications of seam weldinglap seam welding is used for the manufacture of cans buckets and water tanks and for welding thin walled large diameter
seam welding-selection of parametersthe selection of parameters for seam welding depends mainly onweld nugget size which is related to weld
seam weldingseam welding is different from spot welding by the fact that roller type electrodes are used in the former case the principle and process
mash stitch weldingan overlap of about 115 mm is kept and then the plates are squeezed flash by application of pressure at hot condition mash
stitch weldinghere a series of overlapping spot welds are made with the spot welding machine using the conventional electrode tip both water tight
applications of spot weldingas spot welding can be employed for al cu ni and mg alloys it is not advisable to spot weld steels with carbon content
spot welding of different metals-aluminium and its alloyshigh currents and shorter welding times are necessary for these materials special cleaning
spot welding of different metals-copperresistance welding copper is perhaps the most difficult case owing to the high electrical and thermal
spot welding of different metals-nickel and monel metalwhile spot welding these materials the settings are to be properly maintained welding time in
spot welding of different metals-stainless steelstainless steel is having lower thermal conductivity compared to mild steel therefore it requires
spot welding of different metals-low carbon steelnormally mild steel can be spot welded from the thinnest gauges to a maximum of two pieces of 12 mm
spot welding of different metalsthough mild steel is t he metal most commonly used any prime metal or alloy can be successfully spot welded provided
heat distribution in spot weldingbesides the resistance at the interface there are six other resistance through which the same welding current is
strength of spot weldingbecause spot welding has generally replaced riveting in many applications it is reasonable to compare these two processes for
effect of the parameters in spot welding the passage of more current than what is required causes the following defectsi weld expulsionii
spot weldingin this type of welding after proper cleaning of the surfaces the metals to be welded are kept one above the other and two copper
resistance welding processesthe following five are the main types of resistance welding1 spot welding2 seam welding3 projection welding4 upset butt
electric resistance weldingelectric resistance welding is an important and widely applied non fusion welding process this write up covers the basic