DocBourget2005_Aéro Bridge-cut-version 2

CRENO AERO
STACK ROUTER
WITH DETAGGING SYSTEM
The CRENO AERO stack router "bridge-cut" detagging system allows for drilling and routing to be carried out at the
same time on single or several stacked aluminium sheets up to 12 mm.
With this new system, rivets as on the TRUMPF BFZ and fixing screws like on former CRENO AERO are redundant.
They are replaced by little tags between the components and the final skeleton. After main contouring, the bridge
cut system destroys the tags into chips whilst the press-foot strongly clamps the sheets together and separates the
components from the skeleton. The result : perfect geometry even on small components.
High speed routing, mist-coolant and efficient chip extraction reduce deburring and cleaning of components
Global fabrication time is divided by 2 or 3.
with tags
after detagging
small nest (12 mm thick)
LE CRENEAU INDUSTRIEL / 10 rue du Pré Paillard / F-74940 Annecy-Le-Vieux / 33(0)4 50 64 03 85 / 33(0)4 50 64 02 28
Working process description
CRENO can
provide a
digitizing
system on
an external
table Ø
1100 mm
(photo).
This system
can be
installed on
the gantry
of the
machine for
long parts.
1. Nesting software (as an option) :
2. Machining Process :
a)
On the front preparation table, the operator loads onto a pallet
the aluminium stacked sheets which are to be routed generally
up to 12 mm.
b)
Thanks to roller ramps, the pallet is easily pushed onto the work
table.
c)
The operator activates the vacuum "ON" button, which clamps
the work pieces and pallet.
d)
Start the automatic machining cycle.
e)
Machining begins with drilling / milling of holes of different
diameters.
f)
Small corners : when parts have concave curves with a radius
smaller than the radius of the main cutter used for general
routing, a smaller cutter will have to be used. By use of the
CRENO nesting software, the AERO machine automatically
uses these smaller cutters, where required, before the main
routing.
Main routing of pieces is generally executed with a 8-12 mm
flute cutter, retaining "tabs" between components and skeleton.
During this operation, the press-foot pushes slightly the sheets
and its movement follows the same direction as the routing
spindle.
Detagging process : in this phase, the vertical clamping force
is at its maximum when the press-foot is located around the
tabs to destroy them. Two separate movements of X and Y
allow the spindle to mill the tag, whilst the press-foot is
stationary on the stacked sheets.
Unloading of the total pallet with completed components and
the skeleton.
g)
h)
i)
2
1
6
4
3
The CRENO "bride-cut" system deletes the following five
operations :
7
Creation and CAD CAM design of the fixation lugs is avoided.
Drilling of holes for fixing screws or rivets in lugs, components
5
and skeleton is not required.
Also avoided is the automatic counter sinking operation for
9
destroying rivets or removing the screws manually.
8
There is no manual cutting / removal of fixation lugs which is a
long and expensive operation
CRENO AERO BRIDGE-CUT (Detail moving table)
1) High speed spindle (17 KW – 24 000 rpm) with Bridge-cut
system in action
2) Tool changer
3) Wooden pallet with locating for different sheet format
4) Slave panel damaged by drilling
5) 12 mm stacked sheets
6) Screws F90 screws to maintain sheets before introduction and
before drilling process
7) Tabs or bridges before detagging
8) Vacuum control jauge
9) Feeding roller's ramps (option)
Machine capacities :
2 500 x 1 250 mm
3 000 x 1 250 or 1 500 mm
3 660 x 1 250 or 1 500 mm
4 000 x 1 500 or 2 000 mm
6 m – 8 m – 10 m x 2 500 mm
CRENO AERO with moving gantry and fixed table 8 000 x 2 500 mm
LE CRENEAU INDUSTRIEL / 10 rue du Pré Paillard / F-74940 Annecy-Le-Vieux / 33(0)4 50 64 03 85 / 33(0)4 50 64 02 28