E EXPERIENCE 28 - GF AgieCharmilles US

42
AGIE experience
No 28 January 2007
Stanz- und Formtechnik GmbH & Co. KG
ED wire-cut active parts are the
best guarantee for precision
When the automatic bending machines
or high-speed presses
chatter without any standstill at
SFT, this is also proof for the
company proprietor, Roland Settele,
of the high standard of their
own tool-making. For years, SFT
has always invested in the latest
machine tools in order to keep in
step with rising precision requirements,
or even to be one
step ahead of them. The latest
investment is the Agiecut Vertex
ED wire-cutting machine, whose
productive capacity is demonstrated
taking the example of a
three-step follow-on tool. Thus
on this tool, all the active parts
made of hard metal were ED wire
cut or die sunk. SFT used the
Agiecut Vertex for dies with the
finest slits requiring inside radii
down to 0.1 mm or punches with
a tolerance of ± 1 µm. For this,
first of all, start holes were made
in the dies using Agie Präzidrill,
the starting hole drill. The small
electrode tubes used have a diameter
of often just 0.15 mm.
The starting holes are drilled
without any problem, because the
surface destruction in the case of
hard metal lies below 20 µm. At
the same time, all the shaping
inserts, such as e.g. the bending
stations, are manufactured on
the Agietron Spirit 2 ED die-sinking
machine. The cutting contours
for the punches and dies
prepared with Peps were transferred
to the Agiecut Vertex. The
operator selected the best possible
technologies for his requirements
from «Teccut» and allocated
them to the individual machining
jobs. In addition to
roughness, workpiece height and
material, another selection parameter
was also the wire types
used, Cobracut G with diameters
from 0.2 mm through 0.15 mm
down to 0.10 mm. Multiple
clamping then also increased the
efficiency of the ED machining.
Double spools make automatic
wire change possible
The «Agieduo» double spool system
is felt by SFT to be extremely
useful and time-saving. Thus,
without any manual intervention,
two different types of wire can be
used for one machining job, such
as e.g. all the main cuts of a multiple
clamping with CCG 0.2 mm
and all the trim cuts with CCG
0.10 mm. «Economic viability is
elegantly combined with top precision
here», say company owner
Roland Settele. And in addition:
«With Agiecut Vertex we are also
equipped for future precision requirements».
The operator can select the
best technology for his machining
job in each case from
the comprehensive Agiecut
Vertex database.
With the «Agieduo» double
spool system, two different
types of wire can be used in
autonomous, automatic operation,
e.g. for main and trim
cuts.
An Agie Präzidrill is prepared
for drilling the starting holes.
In the case of dies with the
smallest slits and openings,
drill hole are often required
which make the use of electrode
tubes of just 0.15 mm diameter
necessary.
The Agietron Spirit 2 is used at
SFT for the ED die sinking of
mould inserts in tools, such as
e.g. bending stations in a follow-on
tool.
The tools from the company's
own production have proved
themselves in the automatic
punching and bending machines
from Bihler and the
high-speed presses from
Bruderer.
The beryllium punching strip
runs through 13 stations where
it is cut, bent and punched.