TPT July 2015

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Straightening
July 2015 79
Tube, bar and wire straightening
machines from Italy
VIOLI Srl, a specialist in the design and
production of industrial machinery for
the manufacturing of tubes and wires,
has developed a line of straightening
machines for metal profiles, both circular
and complex, that includes the MRT,
MRP and MRF series.
The MRT series for tubes and bars
is equipped with straightening groups
consisting of hyperbolic pairs of rollers
obliquely mounted with an inclination
opposed to each pair. The orientation of
the axes, combined with the hyperbolic
geometry of the rollers, allows the profile
to rotate forward.
All the rollers are mounted on
motorised and independent supports,
flowing within bushings that allow the
operator to modify the height and the
angle of the system. Acting on the
vertical axis is possible to adapt the
straightening machine to different
diameters, and to correct the line of the
advancement of the profile in order to
create a process of metal stressing and
to get products perfectly straight.
The MRT series includes three
models with different capacities: MRT5
for tubes and bars with diameters from 3
to 11mm; MRT5M for diameters from 10
to 30mm; and MRT5M50 for diameters
from 25 to 50mm.
The MRP series products are
designed to straighten square,
rectangular or complex profiles, hot
or cold drawn. The devices consist of
single or double straightening groups of
motorised rollers, adjustable in height
with a decimal display system.
Acting on the vertical axis is possible
to correct the line of the advancement of
the profile, in order to achieve perfectly
straight products. Simply replacing the
traction rollers allows processing of
almost all the profiles included in the
working range.
The MRF series devices are
completely managed by PLC, and are
designed to straighten tubes and bars
made of steel or other materials, hot or
cold drawn, and wrapped on coils.
Violi Srl was founded in 1992 and
originally specialised in designing and
manufacturing industrial machinery,
typically used in goldsmith processes.
Research and innovation have been
vital to the activity of the company over
the years, and it has developed many
technologically advanced machines.
Fom 5 to 10 October Violi will take
part in the EMO 2015 show, the world
machine-tool exhibition, which will
this year take place at Fieramilano in
Milan, Italy.
Violi Srl – Italy
Fax: +39 0575 815903
Email:
Website: