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In spot welding, the parts to be joined are normally over lapped. The work piece are clamped between two water cooled copper electrodes. On the passage of a high transient current, the interface melts over a spot and form the weld. The cooling at the electrode limits the size of the spot. A very high current is needed for a very short duration to complete the welding. The interfaces to be joined are initially cleaned by various methods, including scratch brushing and vapour decreasing. A spot weld normally contains some porosity at the weld centre, which unless excessive is harmless.
The spot welding process is difficult to use for highly conductive materials such as aluminum and magnesium.
Objective of corporate financing Corporate finance control is a division of financial that refers to the control of money of an organization. The attention of corporate financi
Parasitic resistances This is particularly noticeable if the transducer is a long way from where the power supply is located and if the transducer resistance is small.
Climbing Drum Peel Test The CDP test works by attaching a free end of a face sheet of a sandwich panel to a drum which then rolls across the panel, peeling off the face sheet. A
Blanking involves cutting of the sheet metal along a closed outline in a single step to separate the piece from the surrounding stock. As shown in figure, the path that is cut out
Aviation legislation - Certificate of Design: During the construction, the manufacturer has to provide the C.A.A. with a Certificate of Design and also a Type Record for th
Q. What are the differences between soldering, brazing and welding? Ans. S.No. Welding Soldering Brazing
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Air at 1bar and 30 degreeC is to be compressed to 1.2 bar at the rate of 50m3/min. find the power required by a roofs blower.
Solving Poisson''s equation find out electric field in the transition region and show that electric field is maximum at the junction of p-n diode
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