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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.
Electron gun: The electron gun consists of the following: 1. Cathode: An indirectly heated cathode (negatively biased w.r.t. the screen). 2. Grid: A cylindric
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Q. A. Microfinance case How would you value the price of a Microfinance Institution? Using data available on the net, explain what would you consider the value of SKS (India) or Co
(a) Explain briefly any five roadway elements. Include function and current practices used in the design of these elements. (b) Discuss any three emerging (i.e. 'Intelligent T
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advantages and disadvantages oh hot and cold die working in the subject of basic mechanical engineering
Students are to undertake a tunnel blast design for the following conditions: • Tunnel is 5.5m wide by 5.5.m high • Rock is a granite with a UCS of 300 MPa • Drill hole diameter is
how can we determine the crystal structure of material by having interplanar spacing d?
Single acting turbo prop operation: Before moving on to double acting propellers the following diagram and explanations will help the student consolidate the information listed
im on my final year, My final project is to design a 2 story office building, i was wondering if i can get any help from this website
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