TPT November 2011

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November 2011 83 ›
Bending & Tube Manipulation
CNC mandrel tube and pipe bender
ERCOLINA’S GB90/GB100 NC/CNC model
bender series is suitable for bending tube,
pipe, square and rectangular profiles to
centreline radius as tight as 1.5D with
minimum deformation.
Features include interactive touch
screen with Windows-based control, offering
easy operator access to auto and manual
operating modes and system diagnostics.
All commands are available in multiple
language capability. Programmable auto
mandrel positioning allows the operator
to optimise extraction for improved bend
quality. Clamping, pressure die and boost
movements are programmable with manual
override for easy setup. A USB port on the
control panel allows saving and recalling of
program files.
Precision digital encoders on each axis
display both absolute (ABS) and incremental
(INC) position in inch or metric values.
Programmable tooling interference zone
with simulation mode monitors position
and eliminates work head collision. Control
accepts YBC as well as XYZ input values.
A high capacity hydraulic reservoir with
auto power save feature reduces energy
cost. The heavy certified GS500 spheroidal
steel structure of the GB90/GB100SCNC
provides a rigid platform, minimising work
piece vibration throughout the bend cycle.
Ercolina’s patented KST clam shell
clamping system is available on both the
GB90 and GB100 models; the FST finger
clamp system is only available on the GB90
model. Handheld bending control is certified
class 3 safety and all electrical components
are UL, CSA and CE approved. Machines
are available with full CNC seven axis
control.
CML USA Ercolina – USA
Fax: +1 563 391 7710
Email:
Website:
Cold bending process for pipes and
beams
DAVI profile bending machines are
normally utilised to bend beams the hard
way and big pipes. The pipe cold bending
process in particular is becoming more
and more common. In fact DAVI recently
sold several machines for this purpose,
including two very large units able to bend
up to 20" SCH.40.
Pipes are utilised in many sectors.
The most common is as fluid conveyor,
mainly in oil and gas and other energetic
fields. Lately pipes are increasingly used
as structural element in civil engineering,
due to their shape and their mechanical
properties, which improves the structures
resistance to torsion.
The DAVI profile bending machines are
able to bend beams and pipes without
deformation. However, this is possible only if
the load is smoothly and properly distributed
on the part to be bent, otherwise the profile
will twist and deform, losing its mechanical
strength. Even if a machine has suitable
power, it does not mean that it can bend a
beam and/or a pipe: it is also necessary to
apply the correct load and guide the profile
properly while it is fed in the machine.
The machine’s design is the key to
success. The roll position, the dies and the
accessories are key elements to preserve
the mechanical characteristics of the
product. Davi invested in the design of
these machines for many years, building
an unsurpassed experience held by the
skilled technical department, utilising
state-of-the-art tools, such as 3D CAD
and FEM analysis to achieve the
optimum solution to any customer’s
requirement. These results, parts bent
without deformation, is not obtainable
by simply increasing the size of
the cylinders and of the machines,
a solution adopted by many other
machine manufacturers, who do not
invest in developing new concepts.
Davi, always a step ahead in
the sheet metal forming business,
now is proposing a wide range of
machines dedicated to profile
bending, with unique features. This
range guarantees bending all pipes with
dimension between 1" and 32". The largest
one can be bent only on the very large and
heavy machine, with 20½" shafts.
Davi – Italy
Email:
Website:
The redesigned Giga Bender
(Model GB90 shown), and
the KST clamping system
from the Model GB100