GWF Mengele Automatic press brakes

Automatic- GWF MENGELE press brakes
with programmable tool change

Your specialist for f/exible sheet and plate working
MFNГ
Tool change in less than 5 seconds
can you afford to waste more time?
Machines from Günzburg for sheet and plate working —for shaping and cutting of
sheets and plates — have been a symbol of quality and technical progress for many
years.
The automatic press, a hydraulic press brake wíth programmable automatic tool change, is one of the basis of this development.
It guarantees maximum productívíty, flexíble production, constant
accuracy.
Generally, with conventional press brakes, even when they are equipped with a CNC control, it's only possible to produce profiles with a more or less similar bending sequence in a single pass, i.e. without interim removal from the machine.
Due to the automatic tool-changing systems, flexibility of use and productivity are considerably increased with profiles which, owing to their different radii or complicated bending sequences,
cannot be produced with only one tool.
Whilst machines equipped with two optionally positionable swivelling punches on1y offer a relatively limited increase in bending possibilities in a single pass, which sometimes may well be sufficient,
the GWF automatic press with paternoster tool-changing is unique. Up to four of five different punches kept at the ready on the top clamping bar are called up after preselection in the control unit and automatically positioned between
the individual press strokes in less than 5 seconds.
Together with four lower toolš in a sliding die, they form tool pairs within seconds which can be used to produce even the most complicated profiles mostly without interim removal from the machine, thus saving time and offering high precision.
Shapíng tíme reduced by 60 %.
With our electronical control, the programmable sheet stops and penetratíon depth as we11 as the paternoster tool changing system with sliding die, the overall shaping times can be.reduced by about 60 %— even when the set-up times
are assumed to be short.
The automatíc press produces, even when tool-changíng ís necessary, finíshed, ready-to-use workpíeces wíthout ínterím storage.
An automatic press with a tool-changing system also provides advantages where the individual profile itself does generally not require a tool change, but where the
total programme, for example of one day, requires several tool changes. With prepared different upper and lower tools, these set-up times can be saved.
Desígn
Based on the hydraulic two-cylinder press brakes, GWF automatic presses
are available with hydromechanical or electronical synchronisation. The main feature of the automatic press is the paternoster arrangement of the upper tools. Up to four or five punches of different shapes and radii are kept at the
ready in tool-holders in an endlesschain system and, according to bending sequence of the workpiece, they are called, positioned and precisely clamped by the electronical control.
The working or tool length is limited to a dimension which is slightly smaller than the inside column width of the machine.
When the tool-holders are moved into position, they are drawn into the mounting, clamped by cylinders and ejected again when the tool is changed.
Normally, the tools are fastened in the tool-holders wíth clampìng strips. As an optional extra, the fírst and last toolholder can be supplied with a hydraulic
punch-clamping feature, so that these two tools can be quickly changed, if necessary.
When a programmable, continuously adjustable, sliding die is installed, tool pairs can be formed within seconds; these pairs can be used to produce even the most complicated profiles, in most
cases without interim storage of the workpieces.
lnterim removal costs time and money and occupies valuable space. With the stored
tools, the automatic press economically produces just the number of workpieces you require. Expensive storage costs are dropped with, money is not tied up and you save interest.

The advantages of automation
The monitor control with graphic operator guidance panel is specially designed
for the GWF automatic press bake.
Even the basic model is freely programmable for three axes. Operation is easy,
clear and suitable for workshops.
Dialogue between operator and control in plaintext and intelligible language.
Simultaneous display of set and actual values for all axes.
As an optional extra, operator guidance panel with graphic simultation of the product before and after each bending operation with display of the manipulatìon to be
carried out by the operator.
Computation of the NC data and the stretched sheet length.
Advantage 1:
A workpiece can be finished in one pass,
i.e. without having to remove it from the
machine between the individual cycles,
even if it has several different radii and
edges. This reduces downtíme.
Advantage 2:
Above a11 with small series which often recur, the set-up times for the sometimes
frequent tool changes are not necessary.
Therefore, saving of set-up tímes.
Advantage 3:
The interim stacking of workpieces during working takes up valuable space in the area around the machine which the automatic press does not require. Therefore,
savíng of space.
Advantage 4:
Programmed work sequence, rejected sheets are recognized from the first piece
on. Therefore, higher productíon qualíty.
Advantage 5:
Considerable shortening of production time. Therefore, íncrease in productivity, decrease of productíon costs.
Advantage 6:
Economical production of just the number of required workpieces, no unnecessary storage costs. Therefore, no tyíngup of money and no ínterest for stock production and storage.

Just like the basic models of the machines, the automatïc press can be
equipped with useful accessories which further simplify and improve
machine operation:
Electronical control with graphic operator guidance panel for easy, error-free
programming.
Automatic back stop with programmable height adjustment (R-axis) and lateral finger adjustment (Z-axis). Front support arm with handwheel or automatically controlled height adjustment.
Front stops.
Bending aids, programmable.
Bowing facilities, NC-controlled, with hydraulic bottom die clamping.
lncreased working speed.
Greater installation height for higher tools.

Wider table.
Multiple operation (2nd control column).
BWs-light-curtain. sheet thickness tolerance compensation.
Hydraulic die clamping for 2 dies.
Automatic feed and discharge facilities.

Four or five upper tools and four dies — changed ín 5 seconds —
form tool-pairs which you can use to produce even complicated profiles quickly, accurately and economícally wíthout ínterim storage.

Hydraulic press brakes in multi-machine operation, workíng individually or in combination, up to a working length of over 24 m.

Automatic cutting installation for shearing lengths of 1500 up to 8000 mm.

Hydraulic guillotine shears, cutting thickness 4 to 30 mm, cutting length up to 8 m.

Hydraulic single-cylinder presses.
Hydraulic press brakes.