TPT January 2008

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Fittings, Couplings & Tubular Joints
113 January 2008 ›
Rosenberger AG, Germany, has launched
the Twister automatic CNC bending
machine with high flexibility. It is designed
specifically for use with assembled com-
binations of rigid tubes with flexible hoses,
pre-assembled with valves and fittings.
The Twister is based on a robot and one or
more standard RB Rosenberger bending
heads. Functions of the robot include
handling, feeding and rotating the tube
during bending on the bending head. It
can be also used to feed the tube
to a servo-electric driven RU
Rosenberger end-forming
machine. The Twister is
programmed, like
the standard
Rosenberger
CNCbending
machine, from a single control panel, with
direct input of coordinates.
With the Twister it is possible to bend – in
a single cycle – assembled combinations
of rigid tubes with flexible hoses. In
comparison with the traditional process,
which involves the bending of rigid tubes
before assembly with flexible hoses, the
costs are lowered. This is due to the
reduction of machines, operations, space
and intermediate stocking, replaced by a
system that can be quickly programmed
and tooled for various pipes.
The Twister can bend tubes from both the
extremities towards the centre. This is an
advantage when long pipes have to be
bent with large bending angles or rotations
in the last section, because the portion of
tube subject to oscillations will be limited.
In addition, the robot can handle tubes
that are pre-assembled with valves and
fittings.
It is not uncommon during the bending
process for a bend not to be carried out
due to a collision problem, requiring it to be
executed in a later manual operation.
The Twister can integrate this operation in
the bending cycle, locking the tube in front
of the bending head, positioned in relation
to the bend to be made. The ability to lock
the tube in front of the bending head also
enables extremely short last sections to be
created.
The total freedom of movement of the robot
ensures flexibility. The fast and simple
programming software is the same as
that featured on the standard electrically
driven Rosenberger RB20 and RB30 CNC
bending machines.
The Twister can be equipped with a
maximum of five bending heads of different
sizes and bending directions.
Rosenberger is represented in Italy by
Euracciai. The company manufactures
servo-electric driven machines for tube
processing, including bending machines,
end-forming machines, and cutting
machines.
Rosenberger AG – Germany
Fax: +49 7723 919929
Email :
Website:
Euracciai Srl – Italy
Fax: +39 0248 708204
Email :
Website:
Advanced bending concept for use with
fittings and assembled systems
fi (Below) Rosenberger’s Twister with
two RB bending heads, and (bottom)
pipelines with rigid tube and flexible
hoses can be bent on the Twister
› Special tooling fitted on the Twister