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New welding process for

advantages in efficiency

THE new forceArc puls welding process

from EWM AG combines the strengths

of forceArc with the advantages of a

pulsed arc, enabling wide applicability,

low heat input and higher welding


The new MIG/MAG welding process is

suitable for the welding of both unalloyed

or low-alloy steels and chrome nickel

steels. Its deep penetration makes it

especially suitable for root welding with

single- and double-sided full penetration.

In comparison to pulsed arc welding,

the process enables up to 20 per cent

higher welding speeds with an identical

throat thickness.






characterised by a lower heat input,

reducing discolouration and minimising

distortion. As the arc is also nearly

spatter-free, this reduces reworking

and straightening work by up to 50 per

cent – a particular advantage when

working with CrNi steels.

Switching from standard

GMAW welding to the new

process is also easy. The

excellent wetting of the

process makes it easy to

handle, requiring almost

no practice time, and a

reduction in welding fumes

brings high operator acceptance levels.

Pierre Mack, managing director of

Mesa Metall-Stahlbau, commented, “We

have managed to reduce production

times for welding and grinding by an

incredible 57 per cent.” His company

had required 781 working hours for the

production of four water containers for

fire and rescue trains using conventional

welding technology; the introduction of

the new EWM arc and EWM technology

required only 339 hours. “We would miss

out on a lot of contracts if we weren’t able

to weld in this way,” added Mr Mack.


advantages in a range of applications.

Users working in accordance with EN

1090 find the depth of penetration

enables higher strength values in the

joint. The effective and total weld seam

thickness is higher than the nominal

seam thickness, making welding often

possible with just a single pass.


– Germany

Fax: +49 2680 181 244



forceArc puls achieves up to

20 per cent greater penetration

depth compared to the pulsed arc

Photo credit: EWM AG

For ty seven bends in 140 seconds

THE production of lines for braking

systems, air conditioning units and

similar devices with a length of 1,500mm

and diameters of as little as 18mm

represents a challenge when it comes

to bending technology, specifically with

regard to handling. To be economical,

production processes also need to be

swift, and precision and quality are

factors that are just as important. As part

of a recent project the team at transfluid

developed a tube processing system that

involves robot handling of the material

and that can bend tubing in lengths of

up to 4,500mm – 47 bends in a time of

around 140 seconds.

Another specification that the team had

to meet when developing the solution

was that the tubing would be already

shaped or fitted with flanges.

The process involves inserting into a

feeder a bundle of tubes, which are then

individually orientated by symmetrical

rotation according to the positioning of

the flanges. Each tube is then picked up

by one of the two robots, which transfers

it to a moveable spanning device with

an appropriate high retaining system

designed for longer tubing.

The spanning device allows the

robots to process the tubes on one or

even on two sides in parallel. This also

speeds up the procedure. The time

required for processing each tube, even

at this length, is constantly less than

three seconds. Both robots have seven

axes with drive systems, and can bend

right/left. Another advantage of this tube

bending concept is that isometric data

can be uploaded directly online from a

CAD system.

transfluid Maschinenbau GmbH




The combination of a tube bending system with robot handling

allows tubes with a length of up to 4,500mm to be processed