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This is the process where you use direct electrical heating on the ends of the pieces to be welded and then forge them together. This type of welding process comes under the category of resistance welding and this process is commonly known as FLASH BUTT WELDING.By this process material are joined axially.the two workpieces to be joined are placed end to end on a same axis . a small gap is maintained between the workpiece and a very high current(100000A) is passed through the workpiece. once the gap between the two material reaches a critical value the air present between workpiece ionizes with a FLASH. this flash removes the oxide layer ( due to this oxide layer its difficult to weld) from the material surface and also makes the material little soft near the ends. Once the material becomes sufficiently soft AXIAL PRESSURE is increased to make a joint.
This process is used to weld sometimes railway tracks(Delhi metro track),automobile axle,joining blades of a band saw etc.
VOLTAGE <10volts , CURRENT = 100000amp , POWER = 200kva
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Where did flash welding come from?
writing a paper and was wanting info
What is difference between seam welding and spot welding?
The only difference between the two is that projection welding requires preparation of the joint members in the way of adding a preformed dimple or projection. Spot welding is used without such preparation to the joint members. it's just heat and pressure.
Can welding cause cataracts?
Flash Burn and Blindness
Would the flash butt welding of rails by the use of mobile flash butt welding machine can be called a railway engineering activity?
Yes, the procedure and specifications are covered in the AREMA (American Railway Engineering and Maintenance Association) manual Chapter 4.
How can one recognize an arc flash?
An arc flash is the dome shaped blue light over a welding spot and is very dangerous. You will not forget the first arc flash that you see properly as it feels like sand in the eyes.
Does a flash suppressor count when measuring barrel length AOW with a pistol grip?
Yes- IF the flash suppressor is permanently attached by welding or hard (silver) solder, and is not readily removable.
What to do with welders flash?
When you wear safety glasses or any lenses (not contacts) you will drastically reduce the risk of "welders flash". Its almost safe to say you cannot get a true case (wearing safety glasses) unless your really being foolish and welding without an appropriate welding shaded lens. -RedSeal Welder
What is the welding cert roster code for welding?
roster welding
Name of the type of welding?
One type of welding is tube welding. Another type if mig welding.
Difference between ERW and SAW welding?
SAW welding is a type of arc welding while ERW welding is spot or seam welding. SAW stand for submerged arc welding while ERW stands for electric resistance welding.
What are smaw welding?
smaw welding is sheilded metal arc welding
What is the difference between ultrasonic welding and radio frequency welding?
what is the difference between ultrasonic welding & radiographic welding
