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What is the difference between arc welding and resistance welding?
in arc welding only heat is used to weld metal. but in resistance welding pressure will also be used along with heat.
What is temperature of arc welding?
5000-6000c
How does resistance of metal vary with temperature?
The resistance of metals rises with increasing temperature. The resistance semiconducting materials falls with increasing temperature.
What is the temperature co-efficient of a resistance of a thermister?
what is the temperature co efficient of resistance of a thermister
What happens to the resistance of a material with a positive temperature coefficient when it is heated?
Positive Temperature coefficient indicates that the resistance of material INCREASES with rise in the temperature. Resistance Temperature COefficient(RTC) is defined as increase in resistance per unit original resistance per unit rise in temperature. Temperature Coefficient of Resistance=R2-R1/(R1*(T2-T1)) Where: R2:Resistance at temperature T2 R1:Resistance at temperature T1 SO from formula it is clear that if resistance increases with temperature(T2-T1>0 and R2>R1) then Difference R2-R1 will be positive hence RTC will have positive value. But if with increase in temperature(T2-T1>0) resistance decreases(R2<R1) then difference R2-r1 will be negative hence RTC will be negative.
What type of welding machine use in spot welding or resistance welding?
Mainly In spot welding & resistance welding two type welding machines are used :- 1. Air Cooled & 2. water Cooled.
When was the spot welder invented?
Spot welding is a form of resistance welding invented by Elihu Thompson in the late 1800s.
Why spot welding known as resistance welding?
Spot welding is known as resistance welding because the the two pieces of metal melt together at the point of highest resistance to current flow, basically when the electricity flows through the pieces it heats up at the point of highest resistance that is where where the metal pieces touch and in a direct line from the two contact tips on the spot welder. Simple!
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 Determines the exact temperature of the shielded metal welding arc?
It depends on the resistance to the current flow
What determines the exact temperature of the shield metal welding arc?
It depends on the resistance to the current flow
Resistance welding is commonly used in production welding operations?
Yes, resistance welding is used in production welding. It is used extensively in the automotive industry.
What is resistance welding?
Arc. It's where electrical resistance is used to create the heat for the welding process.
What has the author Hongyan Zhang written?
Hongyan Zhang has written: 'Resistance welding' -- subject(s): Electric welding 'Resistance welding' -- subject(s): Electric welding
What is the difference between arc welding and resistance welding?
in arc welding only heat is used to weld metal. but in resistance welding pressure will also be used along with heat.
What is the purpose for welding with direct current?
spot welding is one reason
Why spot welding robot not used in arc welding?
A spot welding robot has generally 5 axis opposed to an arc welding robot that needs 6 axis. The controls and communication channels with the welding power supplies are configured differently as well.
