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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.
Roller Spot Welding In this process, a series of intermittent spot welds are made using wheels or rollers as electrodes. The rollers are power driven and are stopped while ind
Explain the Hydrostatic Pressure Hydrostatic Pressure also called Pressure because of Depth of a Fluid. It is required to define the pressure exerted by a static fluid column o
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Strength of spot welding Because spot welding has generally replaced riveting in many applications, it is reasonable to compare these two processes for strength. Often, riveted
actual division 2km is shown as 1 cm in a map.construct a clean scale to measure km which can travel a distance upto 30 km.Show measurement of 18 km in the scale
Cracks Cracks are the linear ruptures of the metal under stress. Sometimes they appear large and frequently they are narrow separations. The major classification of cracks
Q. Describe about Austenitic stainless steels? Austenitic stainless steels (300 series) generally exhibit very good corrosion resistance in sulphuric acid service for low conce
Gas Porosity Porosity is the presence of gas pockets or voids caused by the entrapment of gas evolved during weld metal solidification. This Porosity is caused due to im
Q. Describe Direct extrusion? • Direct extrusion, also known as forward extrusion, is the most common extrusion process. • It works by placing the billet in a heavy walle
Crank Pin and Crank Shaft - Part of combustion engine: Cran k Pin: Crank pin is region on crank shaft on which big end of connecting rod is attached. These pins are eccentr
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