Short circuiting transfer, Mechanical Engineering

Short Circuiting Transfer

The short circuiting transfer  occurs when the welding current and the arc voltage is low. Metal is transferred from the electrode to the work only when the electrode is in contact with weld pool. Not any metal is transferred across the arc gap. The short circuiting frequency varies from 20 to 200. As the droplet on the wire tip makes short circuit with the weld pool, the current increase until the arc is reignited again. The rate of current rise during short circuiting must be properly controlled.

It must be high enough to maintain a molten electrode tip until filler metal is transferred. Yet, it should not be a sudden surge because it causes spatter by disintegration of the transferring drop of the filler metal. The current increase is controlled by adjusting the inductance in the power source. The correct setting of the inductance will depend on the type of shielding gas and the welding parameters used. For short circuit transfer welding, the open circuit voltage should be low enough so that arc cannot continue under the existing welding conditions. A portion of the energy for arc maintenance is provided by the inductive storage of energy during the period of short circuiting. Short circuiting transfer offers a number of operating advantages. The small & fast freezing weld pool produced is well suited for joining thin sheets, for out of position welding and for bridging large root openings.

Posted Date: 9/17/2012 1:23:01 AM | Location : United States







Related Discussions:- Short circuiting transfer, Assignment Help, Ask Question on Short circuiting transfer, Get Answer, Expert's Help, Short circuiting transfer Discussions

Write discussion on Short circuiting transfer
Your posts are moderated
Related Questions
Can I have a quote for answers relating to this question (6 and 7) on my paper. Thanks

Angle of friction:   It can be defined as the angle made by resultant of normal reaction ( R ) and limiting force of friction ( F ) with normal reaction ( R ). Let,

when correction couple should be applied?

Problem - Newton's Second Law in 1D Newton's Second Law of Motion says that the vector sum of the forces acting on an object equals the object's mass times its acceleration.  Ma

Interpoles or commutating poles Interpoles are ?xed to the frame in among main poles. They are used for sparkless commutation, i.e, to improve commutation.

Derive steady flow energy equation?Also give applications of steady of steady flow energy mathematical equation?

How does the Two Stage Reciprocating Air Compressor works?

Polyhedra and Euler's Formula The b-rep of a polyhedra that are holomorphic to a sphere are topologically valid if they satisfy the following equations : F - E + V - L = 2 (

Hazardous Areas are formally ranked as being a designated hazardous area using the relevant regional or country standards that are directly applicable to the plant design under con

Let consider the breakwater configuration shown in the figure below. The incident wave conditions at the breakwater are a wave height of 1.5m, wave period of 7.0s and a wave crest