FOCUS ON WELDING
Almost all Alwitra ’ s products have to be welded , which is why joining technology is so important to the company .
About EWM
For over 65 years , EWM has developed arc welding technology made in Germany . The family company was founded in Mündersbach , in Germany ’ s Westerwald region , in 1957 . Today , it has over 400 sales and service support outlets across the globe , making it one of the world ’ s leading producers of welding technology . In addition to smart machines , it develops and produces all necessary components ( such as welding torches for manual and automated applications ).
Many EWM welding processes are patented and designed to save energy , materials and time . Sustainability is a key factor . EWM also offers comprehensive , targeted service and consultancy . possible by regulating the welding voltage and welding current , as well as by moving the wire forwards and backwards .
The wire is actively moved towards the weld pool at high speed . The arc ignites on the molten metal and produces a molten droplet at the same time . At the point where the wire comes into contact with the molten metal , the molten droplet in the short circuit is transferred to the weld pool . The RCC module controls the short-circuit resolution . As a result of the active backwards movement , the wire is drawn from the weld pool and the arc reignites .
“ The unique process is the result of combining our powerful Titan XQ R power source with integrated RCC ( Rapid Current Control ) module and React control . The active wire movement in the high-frequency range is generated using a special EWM robot torch with a highly dynamic motor . The EWM process variants ( Speed , Positionweld and SuperPulse ) allow the process to be tailored to the customer ’ s individual requirements . In some cases , the demanding welding tasks require the conventional pulsed arc to be intelligently combined with the React process . This wide variety allows us to supply Alwitra with exactly the right setting for each individual seam ,” outlined EWM .
Low spatter and minimal distortion
The high deposition rates of the spray arc range are combined with all the benefits of the short arc . The result is a low-spatter process similar to the pulsed arc , but cooler for all power ranges . According to EWM , because of the process stability , welding speeds twice as high as with a classic short arc can be achieved while heat input can be reduced by up to 35 %.
“ We were able to minimise the distortion of our materials ,” highlighted Florian Pfeifer . “ EWM React also made it possible to improve
The welding process enables full control of droplet transfer for spatter-free results .
The weld seam must be highly functional and visually convincing .
Welded workpieces .
weld seam quality by making welding spatter and burn-through a thing of the past .”
“ If the weld seam burns through , the weld metal on the underside must be ground away , an additional labour-intensive process . If aluminium is used , the entire component must be remanufactured if it burns through . EWM React now increases the quality of the welding results . Another benefit of the automated process is the increased welding speed . The high deposition rate allows components to be welded more quickly . At the same time , the amount of rework is significantly reduced because of the stable and spatter-free welding process . For Alwitra , this translates into time savings of more than one minute per workpiece , both during welding and for postweld work ,” added EWM .
Automated welding for higher productivity
“ We are very satisfied with the welding technology and the optimised process ,” emphasised Florian Pfeifer . “ In its role as a full-service provider , EWM also offers us comprehensive , competent advice and support in project implementation . We really appreciate that .”
It is not just implementation and quality of the welding machines that is important to Alwitra , but solution-oriented advice and individual service .
“ With EWM , we exchange ideas on an equal footing and benefit from short , uncomplicated communication channels . This makes it easy to work with EWM ,” concluded Florian Pfeifer .
As Alwitra continues to adapt its product range to market requirements , there will be a growing focus on process automation in the future . With EWM React , the flat roof system specialist expects to take its productivity to new levels . n
https :// alwitra . de / en /
www . ewm-group . com / en /
74 | ismr . net | ISMR November 2024