en
Puls-Mix integrates CMT and pulsed arc
30.05.2008
Attractive synergy effects
CMT (Cold Metal Transfer) has revolutionised welding applications. Its advantages include lower heat application and less distortion, extremely stable arc control, exact dosage of droplet detachment, prevention of splatter, thinner seams - even with coated sheet metal, as well as the ability to weld metals of different types or thicknesses. Until now there was an upper limit to the power range. Combining it with pulsed arc technology removes this limitation. The new process Puls-Mix version from Fronius makes any required value in the energy range between CMT and pulsed arc available to welders . In addition there is increased process stability even with "pure" pulsed arc operation thanks to the advantages of the CMT process control technology.
Fronius and pilot users have placed a priority on testing the welding of critical 0.5 to 3.0 mm thick CrNi steel and aluminum alloys as preferred fields of application. Successful tests were carried out on butt, overlapped, fillet, corner and flanged welds. In contrast to other processes, the main advantages lie in the easy control of the heat input and the very stable arc. The user can select the heat input almost continuously over the entire range of CMT and pulsed arc welding. Because of this, the zone affected by the heat for the mixing of materials, as well as the cross-section and the shape of the weld can be deliberately controlled. Or: the heat input can be varied with the same welding performance. This simultaneously removes the power limits of CMT while retaining its advantages.
The reversal of the wire movement remains the typical and unique feature of the CMT process. Here, the control system utilises the direct mechanical contact of the wire with the surface of the workpiece to precisely determine the distance and therefore the length of the arc. For example, 1 CMT cycle every 100 milliseconds between the pulsed arc cycles is sufficient to control the length of the arc. Conventional electrical measuring methods by means of the arc voltage are easily distorted by unwanted conditions such as surface contamination. This is a thing of the past for Puls-Mix users.
Fronius International GmbH
Fronius develops, produces and distributes battery chargers, welding technology and inverters for photovoltaic systems worldwide. The group has four production sites in Austria, the Czech Republic and Ukraine plus more than twelve sales subsidiaries in Europe and America. The company employs 2,221 employees worldwide, 1,661 of whom are based in Austria. Fronius's key figures for 2007 are as follows: sales of 298.5 million Euro, 88.2 % of products exported and twelve international sales organisations around the world - including three new ones in Mexico, Canada and Italy, plus more than 130 international representatives. 16.8% of turnover is re-invested with a further 6.8% going to R&D. Fronius owns 469 patents. One third of all products sold are less than three years old.
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| German | Das Ergebnis aus der Wahl des Wärmeeintrages über das Verhältnis CMT zu Impulslichtbogen: Schweißnahtausbildung in Abhängigkeit von der Zahl der Takte des Impulslichtbogens bezogen auf einen CMT-Takt. jpg - 300 dpi, 461,12 kB |
| English | The result of the selection of the heat input via the ratio of CMT to pulsed arc: Weld formation depending on the number of pulsed arc cycles in relation to a CMT cycle. jpg - 300 dpi, 461,12 kB |
| French | Résultat du choix de l'adduction de chaleur sur le rapport entre le processus CMT et l'arc pulsé : formation du cordon de soudure en fonction du nombre de temps de l'arc pulsé par rapport à un temps de CMT. jpg - 300 dpi, 461,12 kB |
| Italian | Il risultato della scelta dell'apporto di calore attraverso il rapporto tra CMT e arco voltaico a impulsi: formazione del giunto saldato in funzione del numero di tempi dell'arco voltaico a impulsi riferito a un tempo CMT. jpg - 300 dpi, 461,12 kB |
| Spanish | El resultado de la selección de la absorción de calor con la relación entre CMT y arco voltaico pulsado: formación de cordón de soldadura en función del número de tiempos del arco voltaico pulsado referido a un tiempo CMT. jpg - 300 dpi, 461,12 kB |
| Czech | Výsledek volby vnesení tepla pomocí poměru CMT k impulznímu oblouku: Vývoj svaru v závislosti na počtu taktů impulzního oblouku vztažených na jeden CMT-takt. jpg - 300 dpi, 461,12 kB |
| Norwegian | Resultatet av valg av varmeinngang over forholdet CMT til impulslysbue: Sveisetråddannelse avhengig av antall takter på impulslysbuen i forhold til én CMT-takt. jpg - 300 dpi, 461,12 kB |
| German | Der Flansch der Flüssigkeitspumpe aus nicht rostendem Stahlwerkstoff 1.4301 wurde mit der Verfahrensvariante Puls-Mix gefügt; die Rundnaht ist mit 60 cm/min geschweißt und durchgehend homogen. jpg - 300 dpi, 400,18 kB |
| English | This flange of a liquid pump made from 1.4301 stainless steel material was welded with the Puls-Mix process. The circumferential seam was welded at a speed of 60 cm/min and is completely homogeneous. jpg - 300 dpi, 400,18 kB |
| French | La bride de la pompe de liquide en acier inoxydable 1.4301 a été assemblée avec la variante de procédé Puls-Mix ; le cordon rond soudé à 60 cm/min est entièrement homogène. jpg - 300 dpi, 400,18 kB |
| Italian | La flangia della pompa per liquidi in acciaio inossidabile 1.4301 è stata saldata con la versione di processo Puls-Mix; il giunto circolare è saldato a una velocità di 60 cm/min e presenta un'omogeneità continua. jpg - 300 dpi, 400,18 kB |
| Spanish | La brida de la bomba de líquido de acero inoxidable 1.4301 se ha unido con la variante de procedimiento Puls-Mix; el cordón circular está unido a 60 cm/min y es completamente homogéneo. jpg - 300 dpi, 400,18 kB |
| Czech | Příruba kapalinového čerpadla z nerezavějícího oceli 1.4301 byla připojena metodou Puls-Mix; obvodový svar je svařen rychlostí 60 cm/min a je naprosto homogenní. jpg - 300 dpi, 400,18 kB |
| Norwegian | Flensen på væskepumpen av ikke-rustende stålmateriale 1.4301 sammenføyd med prosessvarianten Puls-Mix. Rundsømmen er sveiset med 60 cm/min og gjennomgående homogen. jpg - 300 dpi, 400,18 kB |