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Roll forming lines for complex profiles

FOR more than 100 years, Seuthe, a

company of the Asmag Group, based

near Düsseldorf, Germany, has been

developing tube mills and roll forming

lines on which steel, stainless steel and

ferrous metals are processed.

All lines are mechanically and

electrically developed, assembled and

automated in-house at Seuthe. Nearly

all of the parts used are manufactured

in the group’s production facilities and,

like the line itself, tested in trial operation

prior to delivery. Seuthe prides itself

on its strict quality guarantees. In

addition, customers appreciate the

custom developments and process

requirements tailored to their respective

needs, which justify the company’s

reputation worldwide.

For more than three decades Seuthe

has been designing and manufacturing

roll forming lines for strip widths up to

1,300mm and wall thicknesses of up to


For complex cold-rolled profiles, there

are numerous sales opportunities in

the automotive industry, the energy

industry, construction and mechanical

engineering, as well as the furniture

industry and agriculture. However, the

trend is increasingly headed towards

applications where high strength

profiles, dynamically changed cross-

sections, composite profiles or highly

complex profile shapes are required.

In addition, customers are demanding

complex and progressive processes

and product requirements to obtain

demonstrable competitive advantages,

to react to market demands flexibly or to

be able to produce more efficiently and


In addition to the goal of reducing

operating and maintenance costs,

customers are impressed with the

Seuthe standards because of the

sound engineering and the long service

life of the equipment, but they also

place great value on the modular set-

up, which offers an extremely flexible

adaptation to the respective process and

product requirements. Diverse options

of adjustability, short set-up times and

simple operation are also in demand.

The latest developments are:

• Modular variation of forming

stands as a change module design

(rafted design) for the “off-line”

setting up and “online” producing

in order to minimise machine


• All forming stands are driven

by individual motors per shaft.

This prevents the different relative

speed between the belt and

roller, thereby optimising the forming

geometry. The individual drive leads to

energy savings and to the reduction of

tool costs.

• The solution of the single drive per

roller axis (separated at the top and

bottom) driven by a servo motor offers

a number of advantages: improved

energy efficiency, the ability to precisely

determine the speed and velocity

on each roller axis or to prevent an

over-control or under-control of the

performance values.

• The tricky manual coupling and

uncoupling of the cardan shafts on

the bottom and main shafts was fully

automated by a newly developed

system. Not only is the line availability

drastically increased in this way, but

the occupational safety for the operator

and maintenance personnel is also

increased considerably.

• The line concept can be adapted

for existing exchangeable plates (rafted

design). Existing production tools will

therefore be adopted with rack systems.

Seuthe delivers all machines for all

roll forming processes: strip preparation,

strip accumulation, roll forming stands

in multiple numbers, high frequency or

laser welding tables, sizing units and

different flying saw or cutting units,

including roller conveyor, sorting table

as well as a stacking and bundling unit.

Seuthe GmbH

– Germany



Three tube mills installed by Olimpia 80

THREE complete tube mills with linear

cage forming technology for square

and rectangular sections have recently

been installed in Turkey and Finland by

Olimpia 80.

The “little” mill is the smallest of the

company’s range and can produce

square and rectangular sections from

20x20 up to 60x60mm for a max

thickness 3.5mm at max speed 150m/

min (carbon steel).

The second one can produce square

and rectangular sections from 40x40 up

to 120x120mm for a max thickness 8mm

at max speed 90m/min (carbon steel).

The third one can produce square and

rectangular sections from 40x40 up to

120x120mm for a max thickness 8mm

at max speed 80m/min (stainless steel).

Each line is complete, from decoiler

to cut-off. The mills can produce all the

square and rectangular tubes within the

size range without change of any rolls

in forming, welding, sizing, straightening

and clamp jaws in cut-off. That means

total elimination of all cost for roll sets.

The main advantages of this

technology are speed in changing the

profiles dimensions, easy maintenance

and simplicity in the software utilisation.

With this innovative solution the mill

makes it easy to produce both square

and rectangular tubes by means of a

computerised control, where all data is

stored in order to produce all the tube

sizes in the range in the most practical

way. The PLC records all the useful data

and it is possible to create particular

“shapes” with different angles: from the

PC it is possible to see the “tube flower”

of the tubes that will be produced.

The average time for changing

tube set-up dimensions is around ten

minutes and average saving on raw

material (strips) compared to traditional

tube mills is five to seven per cent.

Olimpia 80 Srl

– Italy

Fax: +39 0523 864584



Photo credit:

© voestalpine Krems, Austria