Fabrication by WELDING has earned its own importance in Manufacturing sector. This article presents you with a glimpse on ROTARY ARC WELDING which can be marked as a technological upgrade of MIG/GMAW
For more about MIG/GMAW Welding please click on the link below:
https://en.wikipedia.org/wiki/Gas_metal_arc_welding
To get best out of GMAW, an arrangement to welding torch is done which transforms it to Rotary arc welding. Actually, in rotary arc welding, the welding torch is attached to a rotating mechanism which rotates the torch by a pre-specified diameter at certain speed about weld groove. Since the consumable welding electrode is fed through the torch, as it is fed after establishment of arc, it melts, due to rotation of weld torch, this molten weld metal experiences centrifugal force enabling high uniform weld deposition rates forming sound weld bead.
This welding technique can be preferred for welding of thick sections.
Some of the ADVANTAGES of Rotary Arc Welding:
1. Inherently speed: due to side wall fusion as molten droplets propel towards walls of groove well enough and also due to increased electrode extension that happens due to change in weld current as a result of rotation of electrode about grove axis)
2. Low temperature gradient in weld zone: as arc rotates about groove (on either side), it is not concentrated at a centre of weld puddle but is constantly moving a little across the weld puddle causing heat to spread-out. Thus reduces weld distortion.
3. Edge preparation is not a concern anymore: Unlike other welding techniques, here as molten metal is propelled onto walls of groove due to centrifugal effect, weld material is well filled without much effort even if the groove is narrow. Hence, it may be beneficial but not necessary to have edge preparations for various grooves like V, Y etc. Simple plain butt joint is enough.
If you are interested further in this topic, the following link may be useful -
WELD REVOLUTION
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| Credits: Designmetalworks.com.au |
For more about MIG/GMAW Welding please click on the link below:
https://en.wikipedia.org/wiki/Gas_metal_arc_welding
To get best out of GMAW, an arrangement to welding torch is done which transforms it to Rotary arc welding. Actually, in rotary arc welding, the welding torch is attached to a rotating mechanism which rotates the torch by a pre-specified diameter at certain speed about weld groove. Since the consumable welding electrode is fed through the torch, as it is fed after establishment of arc, it melts, due to rotation of weld torch, this molten weld metal experiences centrifugal force enabling high uniform weld deposition rates forming sound weld bead.
This welding technique can be preferred for welding of thick sections.
Some of the ADVANTAGES of Rotary Arc Welding:
1. Inherently speed: due to side wall fusion as molten droplets propel towards walls of groove well enough and also due to increased electrode extension that happens due to change in weld current as a result of rotation of electrode about grove axis)
2. Low temperature gradient in weld zone: as arc rotates about groove (on either side), it is not concentrated at a centre of weld puddle but is constantly moving a little across the weld puddle causing heat to spread-out. Thus reduces weld distortion.
3. Edge preparation is not a concern anymore: Unlike other welding techniques, here as molten metal is propelled onto walls of groove due to centrifugal effect, weld material is well filled without much effort even if the groove is narrow. Hence, it may be beneficial but not necessary to have edge preparations for various grooves like V, Y etc. Simple plain butt joint is enough.
If you are interested further in this topic, the following link may be useful -
WELD REVOLUTION
Useful info😊waiting for ur next update
ReplyDeleteThnq😊
DeleteElectric resistance welding
ReplyDeleteThe world owes the invention of electric resistance and spot welding to Englishman Elihu Thomson. This engineer has several patents in the field of spot welding to his name.
Electric resistance welding consists in assembling by autogenous fusion the parts to be welded under the pressure of two metal parts. Who says welding says heat, with resistance welding the heat necessary for welding is provided by the Joule effect (which is the thermal manifestation of electrical resistance, this heat occurs when an electric current passes through any material conductor) of a current of high intensity and low voltage, passing through the parts to be assembled. Indeed, it takes a lot of amps and little voltage. The application of a forging force makes it possible to ensure the metallic interpenetration.
Soudure par point