Start Discovering Solved Questions and Your Course Assignments
TextBooks Included
Solved Assignments
Asked Questions
Answered Questions
intermittent motionmost seam welding machine requirements are met by the use of continuous drive however in cases where heavy work parts are to be
constituents of seam weldingthe essential elements of a seam welding machine aremain frame containing welding transformer and tap switchwelding head
spot and projection welding machineson the basis of the mechanical construction resistance spot welding machines can be of four types viz rocker arm
characteristics of the secondary circuitthe dimensions of the secondary circuit in secondary loop determine to a large extent the performance of
tap switchesthere are elements for connecting the various taps on the primary winding of the transformer to the power supply line the switches are
duty cyclethe concept of duty cycle is to be clearly understood before operating any machine unlike the arc welding power sources the resistance
welding transformerthe resistance welding transformers step down the line tune of 2 to 20 v the primary is connected to the line supply and is made
equipment for resistance welding-protectiona circuit breaker can be provided this equipment can be rated for interrupted capacity which will cater to
equipment for resistance welding-measurementsmeasurement of the parameters are important while fixing the parameters or testing a machine resistance
controls for resistance welding machinesthe main controls required for a resistance welding machine arei initiation and termination of the currentii
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