Power sources for arc welding, Mechanical Engineering


Electric arc welding processes constitute a majority of all the welding processes. Most of the weldable materials can be joined by arc welding. Due to the versatility of arc welding processes they are employed in many product areas. It would be worthwhile, hence, to know better about arc welding process principles, equipments and applications. The one important equipment that is significant for arc  welding processes is the welding power source.


Eventhough, electric arc can be struck with higher voltages (100 - 200 V), it is not recommended to use directly an industrial power connection (440 V / 230 V) for welding, for the following reasons. The arc struck with a higher voltage will be inconveniently large and long. Hence, the manipulation of the arc will be difficult to achieve welding. Moreover, the energy loss of such an arc will be uneconomically high making the welding process inefficient in power. The most important reason is that historically the manual arc welding was developed first, hence the safety of the welder for reducing the risk of electric shock hazard, necessitated a separate welding power source to give reduced operating arc voltages. A welding power source converts the input voltage to a conveniently reduced safe operating voltage.  Arc struck with such a power supply will be small and can be easily guided and manipulated.

Posted Date: 9/14/2012 1:43:14 AM | Location : United States

Related Discussions:- Power sources for arc welding, Assignment Help, Ask Question on Power sources for arc welding, Get Answer, Expert's Help, Power sources for arc welding Discussions

Write discussion on Power sources for arc welding
Your posts are moderated
Related Questions
Improvement Of Existing Airport: The improvements that are usually needed for existing airports fall under the following categories : (a)        Extension of runway to acco

Are the types of pumps selected (base mounted, in-line)? Locate pump on discharge side of boiler. Flexible connector used. Valving indicated, isolation valve on suction and dis

How are the refrigerants classified? Describe the desirable property of a good refrigerant. Explain in brief the thermodynamics, safe and physical working property of an ideal r

Find the magnitude of the angular acceleration of system: A homogeneous sphere having a mass of 100 kg is associated to a slender rod having a mass of 20 kg. In the horizontal

consider the following LPP max z=9x1+8x2+5x3 subject to 2x1+3x2+x3 5x1+4x2+3x3 x1,x2,x3>_0 (a)solve using simlex method (b)hence using the sesitivity analysis,find the new optima

What is the net angle of twist at the free end: The stepped steel shaft illustrated in Figure is subjected to a torque (T) at the free end and a torque (2T) in the opposite di

Gas Flow Rates Shielding gas flow requirements are based on cup & nozzle size, weld pool size & air movement . Generally, the flow rate increases in proportion to the cross s

A steel member supported by a tie bar has a load of 15 000 lbs on it. If the force on the steel member of 1.2 in 2 cross section is 14,180 lbs and the force on the tie bar of diam

A simply supported beam ABC with supports at A and B , 6m apart and with an overhang BC 2 metres long takes uniformly distributed load of 1.5 KN/metre length over the entair length