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Welding HeadSubmerged arc welding head consists of the wire spool, wire feed system, flux delivery hopper and electrical contact nozzle. The electrode wire is unwound from the spool by the power driven rolls, straightened by a set of pressure rolls and fed through the contact nozzle into the weld pool. The drive for wire feed is from a motor with speed control provided either by means of a gear box or by means of thyristor controls.
I have faced a serious problem of Lead segregation and porosity in Copper Tin Zn alloy containing 26-30 % lead sand castings.Can anybody throw light on this
diference between thermal and thermodynamic equallibrim
Arc Spot Welding In this process, coalescence at the overlapping surfaces is produced in one spot by heating with an electric arc between an electrode and the work. The weld i
Drive Chain Cleaning and Adjustment : The service life of the drive chain depends on proper lubrication and adjustment. Poor maintenance can cause premature wear or damage to driv
Estimate Future Capacity Requirements: An electronic packaging centre operates 250 days per year, with one eight hour shift. Management believes that a capacity cushion of 15
Find out the angle of force: Q: A uniform wheel having 60 cm diameter weighing 1000 N rests against rectangular obstacle 15 cm high. Find least force required which when ac
A single plate clutch, effective on both sides is needed to transmit 25 KW at 3000 r.p.m. Calculate the outer and inner diameters of frictional surface if the coefficient of fricti
Field winding Every pole core has one or more ?eld windings provided on it to make a magnetic ?eld. Whenever they carry current, they electromagnetic the poles which pro
Explain Gear Forming In gear form cutting, cutting edge of the cutting tool has a shape similar with the shape of the space among the gear teeth. Two machining operations, mill
A pull up door is stuck in the closed position. A strap, fastened on the inside bottom and located at the center of the door is pulled outward at an angle of 45 deg above horizonta
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