We have seen the overview of a welding process, Arc welding process, Gas welding process, types of flames in Gas welding and Difference between Arc welding and Gas welding with the help of our previous posts.
Let us get more in depth and understand now the difference between DCÂ welding and AC welding with the help of this post.
AC welding and DC welding are basically two different types of arc welding that use different currents in order to develop an electric arc. Such types of welding involve the production of an electric arc between an electrode and the metal being welded.
The electric arc will provide the heat in order to fuse the metals together. A power supply will be used to create the arc, which can either use direct current (DC) or an alternating current (AC).
The selection of power source i.e. Direct current or Alternating current will decide the polarity of the electrical current that runs through the electrode. The source of power which is used will also impact the weld developed.Â
Salient Features of AC WeldingÂ
It is not suitable for welding non-ferrous metalsÂ
Maintenance cost is lessÂ
It is cheaper and simple weldingÂ
It is not suitable for welding sheet metals, since starting the arc is difficultÂ
It consumes less power and also produces less noiseÂ
Bare electrodes cannot be usedÂ
AC is more dangerousÂ
Arc is never stableÂ
It can be used at a large distance from the power supply due to less voltage dropÂ
Salient Features of DC weldingÂ
It is suitable for welding both ferrous and nonferrous metalsÂ
Maintenance cost is highÂ
It is costlier and complicatedÂ
It is suitable for all types of weld as starting the arc is easyÂ
It consumes more power and also produces
more noiseÂ
Both coated and bare electrodes can be usedÂ
DC is comparatively less dangerousÂ
Arc is stableÂ
It can be used only at a short distance from the power supply since the voltage drop is higher
We will see the soldering and brazing process in our next post.Â
ReferenceÂ
Engineering Practices by Mr. S. SUYAMBAZHAHANÂ
No comments:
Post a Comment