Plasma welding of aluminium alloys

Section: Discussionmentioning

confidence: 99%

Untitled

2015

“…Research in the same direction is performed also at SLV Muenchen (Germany). Similar research is performed at Perm State University (Russia) [18,19]. In Ukraine plasma-MIG welding was studied at Priazovsky Technical University [20].…”

Section: Hybrid Technologies Of Weldingmentioning

confidence: 99%

Hybrid technologies of welding aluminium alloys based on consumable electrode arc and constricted arc

Grinyuk¹,

Korzhik²,

Шевченко³

et al. 2016

Main stages of development of equipment and technology of hybrid consumable-electrode plasma-arc (plasma-MIG) welding of aluminium alloys are analyzed. Main design solutions at development of torches for hybrid plasma-MIG welding are shown, i.e. transition from rod anode in hybrid torch plasma part to ring anode. Application of ring anode simplifies the design of hybrid torch for plasma-MIG welding and improves arc contact. The paper presents the advantages of the process of hybrid plasma-MIG welding with coaxial wire feed compared to traditional inert-gas consumable-electrode welding. 23 Ref., 15 Figures.

“…Investigations in this direction are also conducted at SLV Muenchen (Germany). Similar research is performed at Perm State University (Russia) [36,37]. In Ukraine consumable-electrode PAW was studied at Priazovsky Technical University [38].…”

Section: /2015mentioning

confidence: 99%

Main tendencies in development of plasma-arc welding of aluminium alloys

Grinyuk¹,

Korzhik²,

Шевченко³

et al. 2015

Publications, describing the characteristic technologies of aluminium alloy welding by an arc constricted by high-velocity inert gas flow were analyzed. It is shown that plasma-arc welding (PAW) is further development of the process of nonconsumable-electrode inert-gas welding. It is established that during development of PAW of aluminium alloys, there was a transition from alternating sinusoidal current to reverse polarity direct current, and furtheron to variable polarity asymmetrical current with rectangular current waveform. A more promising direction of improvement of PAW equipment is transition from specialized power sources to modular design of PAW system, based on power sources applied for nonconsumable electrode welding and plasma modules. Further path of improvement of the processes of aluminium alloy PAW is combined or hybrid application of several heat sources, including the constricted arc and consumable-electrode arc. In the authors' opinion, hybrid consumable-electrode PAW with hollow anode and axial wire feed in the most promising variant. 41 Ref., 17 Figures.