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PARTNER TO THE BEST
Axxicon – Netherlands
Güntensperger – Switzerland
Feintool - Switzerland
Kummer – Germany
Karl-Heinz Müller – Germany
Kaufmann – Switzerland
Golden times in EDM wire cutting
With the Gold Edition you are the winner!
NO. 25
T H E A G I E E D M M A G A Z I N E
E EXPERIENCE 25 21.03.05 14.4.2005 9:40 Pagina 1
Agietron Spirit 2 is the ED die sinkingmachine for universal use, from simpleto demanding machining jobs. For fastset-up, simple operation and reliableED machining:- Simple data input with a few intuitiveinputs and self-explanatory symbols.- Short set-up times with manual con-trol and automatic measuring cycles.- High removal performance and lowwear with new generator technologies.- Exclusive EDM function with Jog EDmachining. Electrodes can be centred in already existing tools.- Made in Switzerland in Agie's state-of-the-art production workshops.
Agietron Spirit 2: Unique in its class!
AGIE SAVia dei Pioppi 2CH - 6616 LosoneSwitzerlandTel. +41 (0)91 806 91 11Fax +41 (0)91 806 92 60info@agie.comwww.agie.com
AGIETRON
With the right attitude to ED die sinking
Agie Charmilles Group
500.
028.
218
E EXPERIENCE 25 21.03.05 14.4.2005 9:42 Pagina 32
Nr. 25April 2005Appears in English,French, German andItalian.
Edited and text by:M. KatzGraphics and pagination:R. Grizzi, F. SimonaPrinted by:Tipografia Poncioni SALosone - Switzerland
© AGIEAn Agie CharmillesGroup Company.No responsibility isaccepted for technicaldata or the content ofarticles.
AGIE SACH-6616 LOSONETEL. +41 91 806 91 11FAX +41 91 806 92 60www.agie.cominfo@agie.ch
About the cover picture:Using EDM systemsfrom Agie, the Swisscompany Alois Gün-tensperger AG manu-factures punching andforming tools withwhich it produces teethfor zip fasteners of theworld-famous Riribrand on the company’sown presses.
Dear Readers,2004 was the year in which Agiecelebrated the fiftieth anniversaryof its founding. Our customersand suppliers, representatives ofpublic offices and institutions cel-ebrated with us. We say thank youvery much for their attendanceand the commitment of all ouremployees. Now the festive yearhas come to an end and the NewYear is putting us in a confidentmood. New products have beendeveloped, the ranges of modelshave been improved and at thisyear’s EMO in Hanover Agie willbe able to present the first prod-ucts of the “EDM Futura” project.So the course has been set forthe future. Let us hope that theeconomic environment for thiswill also be right, then nothingmore will stand in the way of yourand our success.
Today you are holding the 25th is-sue of Experience in your hands.Also a small anniversary that maybe demonstrated with a few figures:1993 was the year of the first
issue133 articles on customers
have been published16 different countries have
been represented up to now
2656 pages have been printedin 4 languages
550,000 is the estimated total print run
A success to which you, as anAgie customer, have decisivelycontributed, making the publica-tion into what Experience is today:The only ED machining customermagazine. Thank you very much!
Michael Katz
Technical Editor
Agiecut Classic 2S and 3S GoldEdition are based on the well-proven Classic series which issuccessfully on the market. TheGold Edition is a special pack-age containing various functionsto shorten the setting-up andthreading times and offeringhigh added value with numerousadditional optional features:
2005‘‘2AGIE experienceNo 25 April 2005
Golden times in EDM wire cutting
Halved set-up timesWith Gold Edition’s selectablethreading mode, setting up be-comes more efficient on theAgiecut Classic 2S and 3S:Highest speed (8 - 15 seconds),highest reliability or a combina-tion of both. With the Gold Edi-tion’s selectable positioningmode, setting up becomes fasteron the Agiecut Classic 2S and 3S:Depending on the application,one or more optimising possibil-ities can be employed.
A good start in the year:
E EXPERIENCE 25 21.03.05 14.4.2005 9:40 Pagina 2
’’Agietron Spirit 2 is the ED die-sinking machine for fast settingup, simple operation and reli-able ED machining.Every Agietron Spirit 2 containsdecades of Agie EDM know-how.In the machine tool, the controlsystem, the generator. Made inSwitzerland.The Agietron Spirit 2 can be uni-versally employed. From simpleto demanding machining jobs.For this Agietron Spirit 2 offersa multitude of functions and de-vices making this ED die sinkingmachine unique in its class:
3AGIE experienceNo 25 April 2005
Simple data input.The operator is guided throughthe program with self-explanato-ry symbols. Minimal data on theworkpiece and electrode are suf-ficient, and the control systemwill generate the optimal EDMtechnology.
Short setting-up times.With manual control, automaticmeasurement cycles, as well asgood accessibility to the workarea, EDM jobs can be startedwithin the shortest time. Clam-ping, measuring, ED machining –Agietron Spirit 2 does not requireany special previous knowledgeof ED die sinking.
High removal rate.With new generator technologieswhich achieve removal ratesthrough the intelligent interac-tion of various functions that areabove average in all fields of ap-plication.
Great application spectrum.With four controllable and pro-grammable axes, an extensivechoice of technology, as well ashigh thermostability, the wholemachining range of ED die sink-ing can be coped with using theAgietron Spirit 2, from simple re-pair jobs to complex multicavi-ties.
Agietron Spirit 2 with perfor-mance features which are farabove the average for their class.
The Agie noveltiesWith the right attitude to ED die sinking
Additional added valueAgiecut Classic 2S and 3S asGold Edition are ED wire-cuttingsystems containing numerousadditional optional features of-fering added value without addi-tional costs. The Agiecut Classic2S and 3S models as Gold Edi-tion offer a complete range ofequipment for planning, settingup and ED machining. ED wirecutting with great convenience ata small price.
With the Gold Edition you arethe winner!
E EXPERIENCE 25 21.03.05 14.4.2005 9:40 Pagina 3
4AGIE experienceNo 25 April 2005
Country Netherlands
Production - Prototype injection moulding tools- Pilot run injection moulding tools- Heavy-duty composite injection moulding tools
Target market International
Employees 325 worldwide, 130 of them in Helmond
Founded 1947
EDM systems 2 Agietron Innovation 2, each with an Erowa ERS handling system
1 Agietron Integral 31 Agiecut Classic 2S Celebration
Programming - ProEngineer for electrodes- Hypermill for CAM
Clamping systems Erowa
Certification NEN-EN-ISO 9001-2000
Measuring, testing - Holos measuring machine from Zeiss
Axxicon Moulds Helmond BV
P.O. Box 237
NL-5700 AE Helmond
Kanaaldijk z.w. 7b
NL-5706 LD Helmond
Netherlands
Tel +31 492 598 888
Fax +31 492 533 825
info@axxicon.com
www.axxicon.com
AXXICON Moulds Helmond BV
The internationally active Axxicon Moulds Helmond BV
has its head office in Helmond, near Eindhoven. The
company, certified in accordance with ISO 9001, has 325
employees on its payroll worldwide and specialises in
the complete manufacture of injection moulding tools,
from simple to composite moulds, as prototypes, as well
as for pilot runs. Axxicon develops and produces plastic
parts and components itself for various branches.
E EXPERIENCE 25 21.03.05 14.4.2005 9:40 Pagina 4
5AGIE experienceNo 25 April 2005
Innovative ED die sinking for highly complex mouldsSystem supplier for the high-tech branchesAxxicon Moulds, based in Hel-mond, Holland, is a companythat is internationally active intool and mould making. Axxiconhas 325 employees on its payrollworldwide and runs 6 productionplants in 4 countries. Thesemanufacture standardised toolsfor the following fields:- Optical storage media (Axxiconis the No. 1 worldwide here)- Tool systems for testing thecompressive strength and in-flammability of polymer plastics.Customised tools are manufac-tured for: - High-quality disposable articles- Mobile phones- Pharmaceutical and medicalappliances.Axxicon has manufactured seve-ral injection moulding tools forthe latter field which are used forthe production of insulin syringesfor self-medication. This reportshows you how innovatively EDdie sinking has been employed inthis connection.
The cut open mould insert clearly shows the use of the
copper electrode which produces the steep helix inside the
casing by means of the simultaneous rotation of C-axis and
downward movement of Z-axis.
The insulin syringe with closing cap is manufactured and
assembled completely at Axxicon.
Grid model and mould insert of the casing interior with the
steep helix.
Axxicon generates the CAD program for the tool-making
in accordance with the customer’s drawing.
The tool for the production of the syringe casing generated
as a solid model from the CAD program.
E EXPERIENCE 25 21.03.05 14.4.2005 9:40 Pagina 5
6AGIE experienceNo 25 April 2005
AXXICON Moulds Helmond BV
The two robotised Agietron Innovation ED
die-sinking systems are often up to 4
weeks uninterrupted in use.
Mould insert for the interior mould of the
closing cap which forms the teeth.
Mould insert for the casing interior with
the copper electrode which produces the
helix by moving the C and Z-axes.
In medicine, quality is the measure of all thingsAxxicon won the order to manu-facture the mould inserts for in-jection moulding tools for theproduction of insulin syringes.The customer’s article drawingserved as the starting materialfor the design of the mould in-serts. On the basis of the plasticmaterial to be used and the di-mensions, the amounts ofshrinkage were determined andthen detailed drawings of the in-dividual syringe componentswere prepared. The machiningprocesses were then defined inaccordance with precision andeconomic viability criteria. Theforms for the electrodes were de-rived from them using ProEngi-neer, and manufactured by high-speed milling. The individual toolmodules were clamped pal-letised, measured on the mea-suring machine and the referencewere allotted to the machinetools’ programs. Large cavitieson the tool were then pre-milledby high speed milling. The twoAgietron Innovation ED die-sink-ing systems were employed forthe fine and precision work.
Reliable ED die sinking for automated sequencesAll the electrodes and work-pieces were clamped and plottedat the presetting position. Themeasurement data with the ref-erence points were loaded on theAgietron Integral and allocated tothe EDM programs. Then the pal-letised, clamped workpieceswere loaded onto the ERS han-dling system from Erowa and theelectrodes were fitted onto theAgietron Innovation’s electrodechanger. The machining pro-grams were allocated to the elec-trodes and were displayed onceagain two or three dimensionallyby means of the Graficheck. ED machining was started andthe preset program was workedthrough reliably, with copperelectrodes being provided for ma-chining separating surfaces as itwas possible to achieve optimalfitting accuracy and the requiredsurface quality of Ra 0.8 µm. Forthe machining of pre-milledmoulds graphite was used, asthe electrode material for highremoval rates. After 100 hours,the mould inserts for the blueclosing caps were ready, and af-ter 250 hours those for the blackinside part with the helix. Thanksto automated ED die sinking,Axxicon was able to deal withthis order on time and in the re-quired quality.
E EXPERIENCE 25 21.03.05 14.4.2005 9:40 Pagina 6
Name 8-fold injection moulding tool for insulin syringe casings
16-fold injection moulding tool for insulin syringe interior with helix
Tool material High-grade finished steels Stavax and Elmax
EDM time 100 h closing cap, 250 h interior with helix
Finished part surface Ra 1.0 µm
Electrode material Graphite, copper for separating surfaces
Electrode production High-speed milling
Surface roughness Ra 0.8 µm closing cap, Ra 1.3 µm interior with helix
One of the two Agietron Innovation 2 is
always in use. The reliability of the two
Agietron Innovation has more than
convinced us. It is quite certainly not
every day that you have four weeks
non-stop EDM in one go, and yet it is
reassuring when you know that
electrodes are still being changed with
the same Swiss precision on the last day
as on the first day.Han Bucks,
Manager of the EDM Department
of Axxicon Moulds Helmond BV
7AGIE experienceNo 25 April 2005
The tool data
”
We would like to thank AxxiconMoulds Helmond BV., in partic-ular Han Bucks, the Manager ofthe EDM department as well asRon Maarschalkerweerd fromthe sales force of our Dutchagency De Ridder b.v., for theirkind support and helpful co-op-eration with this report.
Responsible
Sales Engineer:
Flavio Guadagnini,
Agiesales Ltd.
“Graphite electrode and mould
insert for the insulin syringe
closing cap.
The “closing cap” mould insert
is measured on the measuring
machine and checked for the given
form accuracy.
Part of the insulin syringe casing
with the window aperture for
reading and setting the insulin
dosage.
Half of the injection moulding tool
mould for the production of insulin
syringe casings.
E EXPERIENCE 25 21.03.05 14.4.2005 9:40 Pagina 7
8AGIE experienceNo 25 April 2005
Country Switzerland
Production - Blanking tools- Progressive tools- Fine cutting and forming tools- Injection moulding tools- Punched products
Target market International
Employees 50
Founded 1979
EDM systems 1 Agietron Hyperspark 2 with 50-fold electrode changer1 Agietron Exact 3 with 28-fold electrode changer1 Agietron Integral 3 with 28-fold electrode changer1 Agietron 1001 Agietron 200 with 14-fold electrode changer1 Agiecut Vertex2 Agiecut Excellence 31 Agiecut Progress 21 Agiecut Progress 31 Agiecut 1701 Agiecut 200D+SF1 Agiecut 100D
Programming - Mecanic for ED wire cutting- 3D Mastercam and 2D Alphacam for HSM milling- 2D One Space Designer Drafting (ME-10) and
3D One Space Designer Modelling from Solid Designer for CAD
Clamping systems Erowa
Measuring testing Measuring machine LH 87 from Wenzel
Alois Güntensperger AG
Roswiesstrasse 25
CH-8608 Bubikon
Switzerland
Tel +41 (0)55 253 29 29
Fax +41 (0)55 253 29 20
guentensperger@guentensperger-ag.ch
www.guentensperger-ag.ch
Contact Alois Güntensperger, Company ownerMartin Betschart, Manager Engineering
Alois Güntensperger AG
E EXPERIENCE 25 21.03.05 14.4.2005 9:40 Pagina 8
9AGIE experienceNo 25 April 2005
The company, founded by its present owner,
Alois Güntensperger, in 1979, has developed
from being a small jobbing EDM business into
an undertaking with over 50 employees. Alois
Güntensperger AG’s fields of activity are the
manufacture of blanking, fine blanking, pro-
gressive and injection moulding tools, as well
as punched products which are manufactured
in the company itself.
E EXPERIENCE 25 21.03.05 14.4.2005 9:40 Pagina 9
The finished casing for clamping con-
tacts shows the precise shaping of
even the smallest details.
The CAD design drawing of a mould
cavity shows the various mould in-
serts.
The two slides are coloured blue and
yellow in the CAD design drawing.
Data input on the Agietron Exact to
create the ED die sinking program.
10AGIE experienceNo 25 April 2005
Alois Güntersperger AG
A success story with electricaldischarge machining Just recently, Alois GüntenspergerAG celebrated its 25th anniver-sary. A success story for thebusiness based in Zurich Ober-land which began in 1979 withan ED wire-cutting machinefrom Agie. Today, Alois Gün-tensperger AG has over 50 em-ployees on its payroll and a com-prehensive range of state-of-the-art machines at its disposal,covering the high-end spectrumof tool and mould making:- Blanking tools- Progressive tools- Fine blanking and formingtools- Injection moulding tools.In addition, punched productsare manufactured on heavy-dutypresses which are used in themost varied branches. A 16-foldinjection moulding tool, that wasmanufactured to the order of arenowned plug manufacturer,shows how expertly and, above all,how according the schedule, theAlois Güntensperger AG uses EDdie sinking and wire cutting.
E EXPERIENCE 25 21.03.05 14.4.2005 9:40 Pagina 10
11AGIE experienceNo 25 April 2005
Economic use of means of production Mould inserts and active parts ofthe 16-fold injection moulding toolwere selected in accordance witheconomic criteria of the means ofproduction. Economic, becausetime-saving hard milling could notbe taken into account in view ofthe complexity of the form. On theother hand, EDM systems were inuse for over 450 hours. A quarterof this was ED wire cutting andmost of the rest was carried outwith the ED die sinking systemsAgietron Hyperspark and Exactwhich, thanks to their electrodechangers, made unsupervisednight and weekend operationpossible. Forty different mouldelectrodes were needed for the16 mould cavities so that, all inall, with roughing and finishingelectrodes, more than 100 elec-trodes had to be produced. Cop-per was chosen as the electrodematerial for its great fidelity todetail. The electrodes were man-ufactured with high-speedmilling machines, then pre-clamped, measured at the pre-setting position. The data wereallocated to the references onthe two ED die-sinking systemsand the changers loaded with theelectrodes.
React proactively to customers’ requirements When Alois Güntensperger AGreceived the order for the manu-facture of a 16-fold injectionmoulding tool, they knew that re-quests for changes to the finalproduct from the customer’s sidewould still have to be taken intoaccount at all time. The drawingfor the casing of a clamping con-tact served as the starting basisfor the tool design. From it, AloisGüntensperger AG generated theCAD data for the tool. Already inthis phase, the possibility ofchanges was taken into accountwith mould cores being plannedon a modular basis. Thus if theeventuality arose, it was possibleto react quickly to changes re-quired in the geometry or dimen-sions. The necessary flexibilitywas provided with EDM as thecore manufacturing technology,as in ED wire cutting, only thecontour program and in ED diesinking possibly a few electrodeshad to be changed. EDM’s highdegree of repeatability when po-sitioning, when applying cuts orcavities exactly, was brought fullyto bear.
The slide is mounted on the finished
injection moulding tool.
Convenient setting up of the Agietron
Exact with manual operation.
A mould cavity of the 16-fold injection
moulding tool for the production of
clamping contacts.
Construction drawing, set of electrodes
and ready to use slide for undercuts on
the injection moulding tool.
E EXPERIENCE 25 21.03.05 14.4.2005 9:40 Pagina 11
12AGIE experienceNo 25 April 2005
Alois Güntersperger AG
Sixteen times exactly the sameform accuracyWhen ED die sinking the 16 mouldcavities, the Agietron Hypersparkand Exact convinced with thesefunctions and performances:- Thanks to Agiesetup 2D, it waspossible to set up the mould in-serts without fine adjustment.- It was possible to transfer theelectrode design data by Script-file, an exclusive Agie feature inED die sinking, directly to thecontrol.- Thanks to Formalcheck, thedata input could take placequickly and completely.- With Graficheck it was possibleto display the machining jobstwo and three dimensionally, asin the drawing, and to simulatesequences for maximum safety.- Thanks to Easygeo, it was pos-sible to select and generateplanetary strategies easily .- Pieceinsert gave the flexibilityto interrupt a job quickly, carryout an express order, and then toresume the previous job, exactlywhere it had been interruptedwithout reprogramming.- It was possible to carry out thedata input without technologytables as Tectron automaticallyselects the correct machiningtechnology on the basis of thedetails on the workpiece andelectrode.- The performances with respectto removal, surface quality andpositioning accuracy were out-standing on both machines.
Features which proved them-selves for Alois GüntenspergerAG 16 times on the injectionmoulding tool and finally also onthe finished article, the casing ofa clamping contract. Technicalmould making particularly mustmeet high standards with respectto form accuracy, surface qualityand long tool lives.
ED wire cutting separated from classical useThe complexity of the 16 mouldcavities of the injection mouldingtool required a specific design forthe tool, in accordance with eco-nomic and process engineeringaspects, getting away from theclassical use of ED die sinkingfor injection moulding tools andED wire cutting for blankingtools. The share of 120 hours EDwire cutting shows that at AloisGüntensberger AG this processhas the same important role inmould making as ED wire cuttinghas. With Agievision, Agie EDMsystems have a control systemthat comes very close to this phi-losophy with an almost identicaloperating surface for die sinkingand wire cutting.
Convenient setting up of the Agietron
Exact with manual operation.
The slide is mounted on the finished
injection moulding tool.
A mould cavity of the 16-fold injec-
tion moulding tool for the produc-
tion of clamping contacts.
The company owner, Alois Gün-
tensperger, still takes a hand with
ED machining, here while preparing
an Agiecut Progress for unsuper-
vised night operation.
ED wire cutting is also a key tech-
nology at Güntensperger AG with
high-precision active parts of tools.
E EXPERIENCE 25 21.03.05 14.4.2005 9:40 Pagina 12
13AGIE experienceNo 25 April 2005
Measuring a slide for the 16-fold
injection moulding tool on a mea-
suring machine from Wenzel.
We would like to thank theowner of the company, AloisGüntensperger, for his kindsupport and helpful co-opera-tion with this report.
Responsible
Sales Engineer:
Martin Planzer,
Agiesales Ltd.
The tool dataName 16-fold injection moulding tool
Finished part name Casing for clamping contacts
Finished part material PA 6.6 V0
Tool material 1.2379, active parts powder metallurgical steel M 3 90
Tool weight 420 kg
Electrode material Copper
Electrode production High-speed milling
Number of electrodes 40 mould electrodes, all in all over 100 for roughing and finishing
EDM time 480 hours, 25% of which ED wire cutting
Surface roughnesst VDI 18
At the time of
founding the com-
pany 25 years ago,
I began with an
EDM machine from
Agie. Since then,
I have remained
faithful to the
brand, because a
part of my compa-
ny’s success is
quite certainly also
based on the relia-
bility and precision
of these EDM sys-
tems.Alois Güntensperger,
Owner of the companyder
Alois Güntensperger AG
“
”
E EXPERIENCE 25 21.03.05 14.4.2005 9:40 Pagina 13
14AGIE experienceNo 25 April 2005
Country Switzerland
Production - Fine blanking presses with pressing forces of 250 kNto 14000 kN
- Tool systems for fine blanking and metal forming- Multifunctional parts and components for:
AutomotiveElectrical and electronic devicesOptical and medical appliancesHousehold and tool devicesLeisure and sports equipments
Target market International
Employees 1800 worldwide, half of them in Switzerland
Founded 1959
EDM systems 2 Agiecut Progress 21 Agiecut Progress 31 Agiecut 250 HSS1 Agie Mondo Star 201 Agietron EMS 1.101 Agiedrill
Programming - Solidworks for CAD- Topsolid for CAM
Clamping systems Own solutions
Certification ISO 9001: 2000
Measuring, testing 3D-CNC measuring machine from Zeiss
Feintool Technologie AG Lyss
Industriering 3
CH-3250 Lyss
Switzerland
Tel +41 (0)32 387 51 11
Fax +41 (0)32 387 57 88
kurt.naef@feintool.ch
www.feintool.com
Contact Kurt Naef, Manager Technology Centre
FEINTOOL Technologie AG Lyss
Feintool, which has been quoted on the stock market
since 1998, is market leader in the field of mechanical
and hydraulic fine blanking equipment and tools. The
internationally active company is divided into 4 divisions:
Fine Blanking Technology, Automation, System Parts as
well as Plastic/Metal Components. Founded in 1959, the
Group has over 1800 employees on its payroll worldwide
and supplies the automotive, electrical/electronic and
telecommunications industries, as well as further innova-
tive branches.
E EXPERIENCE 25 21.03.05 14.4.2005 9:41 Pagina 14
15AGIE experienceNo 25 April 2005
Progressive ED wire cutting for fine blanking tools
Technology pioneer in fine blankingFeintool’s company history beganin 1959 as a 3-man pioneeringbusiness and developed into theinternationally active groupwhich today holds the marketleadership in the field of fineblanking presses, as well as inthe manufacture of fine blankingand metal forming tools. Withtechnology centres in three con-tinents, its own production andmarketing establishments in Eu-rope, the USA and Japan, as wellas a network of competent agen-
cies, Feintool is the partner forcustomers in the automotive,electrical/electronic andtelecommunications industries,as well as in further innovativebranches. The technology of fineblanking, which reduces theprocess chain in the conventionalmanufacture of functional partsmade of sheet metal to 2 to 3machining steps, also helpedFeintool to success. Fine blank-ing and metal forming tools areneeded for this which mustsatisfy the high demands for pre-cision. As the example of a baffleplate for an automatic transmis-sion shows, an ideal field ofemployment for ED wire cutting.
The starting point for the design and
production of a fine blanking and metal
forming tool for the production of baffle
plates for an automatic transmission
was the customer’s drawing.
A cut-open automatic gear illustrates
the classical range of application for
functional parts made of sheet metal
which are manufactured with the
production processes fine blanking and
metal forming.
E EXPERIENCE 25 21.03.05 14.4.2005 9:41 Pagina 15
On Agiecut Progress, a mould die
is presented three-dimensionally
by Graficheck.
FR FR FR
FG
FS
FS = FR = FG =
�
�
�
�
�
� �
� �
� �
X ~ 5% S
S
FS
H
A
S
X ~ 0,5% S
FR FR
FGFS FS
FS
FR
FG
16AGIE experienceNo 25 April 2005
FEINTOOL Technologie AG Lyss
stepped workpieces, for the auto-matic execution of measurementcycles, for inserting express jobswithout reprogramming, for pro-gram generation without techno-logy tables or for flexibly settingpriorities.The sum total gave shorter set-up and EDM times which, in com-bination with fewer wearing parts,led to lower operating costs,which for their part increasedFeintool’s competitiveness.
New cutting technology accelerates EDM“The Agiecut Progress machinesput into use since the beginningof 2004 allow Feintool to be at thehighest level with regard to man-ufacturing quality, safety and per-formance, and to increase flexi-bility, and this with simultaneousreduction of the operating costs.”This is the assessment of KurtNaef, the manager of Feintool’stechnology centre. Here are someof the performance features ofAgiecut Progress:- Finest surface qualities areachieved by the new generatortechnology eCut with the fine-fin-ish module.- Smaller interior radii can be re-alised by using the finest wires,without replacing the wire guides.- Increased reproducibility by us-ing state-of-the-art digital tech-nology.- Precision is achieved in themicron-field by continuous mea-surement and correction of theaxis positions using a dual mea-surement system.- In addition, functions for thecorrection of wire sagging, for theunbraked cutting of corners andradii without loss of precision, foradapting power in the case of
The technology of fine blanking and metal forming tools
The 3-forces principle in tool and press
used in fine blanking and in fine blanking
combined with metal forming.
The two process fine blanking (top) and
normal punching taking the example of a
counterbalance weight in comparison.
Comparison of the process chain with con-
ventional manufacture and fine blanking.
Cutting forceKnife-edged ring forceCounterforce
Cutting force
Knife-edged ring force
Counterforce
1. Blanking die
2. Stripper plate
3. Punch
4. Ejector
Normal punching
Conventionalproduction
Fineblanking
Fineblanking
1. Cutting out a blank
2. Punching a centre hole
3. Punching a window
4. Flattening
5. Milling teeth
6. Bevelling a tooth tip
7. Finishing
8. Boring a centre hole
9. Chamfering a centre hole
1. Fine blanking
2. Bevelling teeth tips
3. Finishing
Comparison of the two processes
normal punching with fine blanking.
E EXPERIENCE 25 21.03.05 14.4.2005 9:41 Pagina 16
17AGIE experienceNo 25 April 2005
The fine blanking and metal forming
tool with various EDM wire-cut active
parties which are ready for fitting.
With Agievision control unit programs,
cutting technologies are allocated to
the baffle plate’s geometries.
A punch guide and punch which has
been hardened and coated for protec-
tion against wear.
We would like to thank FeintoolTechnologie AG Lyss, in partic-ular Kurt Naef, the Manager of the Technology Centre, fortheir kind support and helpfulco-operation on this report.
Responsible
Sales Engineer:
Olivier Beutler,
Agiesales Ltd.
The tool data
Name Fine blanking and metal forming tool
Finished part name Baffle plate for an automatic transmission
Finished part material 4.5 mm thick steel strip
Finished part surface quality VDI 24
Tool material Tool steels and powder metallurgical tool steels which
have been hardened and coated for protection against wear
Tool weight 1600 kg
Tool working life 100.000 parts until resharpening
EDM wire CCA 0.2 mm diameter
Cut heights 60 to 100 mm cylindrical
Number of cuts 1 main cut and 5 trim cuts
Surface quality Ra 0.2 µm
Positioning accuracy ± 5 µm over the whole tool
The manufacturing data
“
”
Since we have had the three Agiecut Progress machines
in operation, EDM wire cutting has become more than
one third faster in our works. And this thanks to func-
tions, such as Variocut, Dynamic Corner Control or Wire
Bending Control with constant high precision. Punches
and dies can be fitted into the tool in many applications
without any further finishing.Kurt Naef,
Manager Technology Centre of
Feintool Technologie AG Lyss
E EXPERIENCE 25 21.03.05 14.4.2005 9:41 Pagina 17
18AGIE experienceNo 25 April 2005
Country Germany
Production - Progressive dies in modular construction for internal and external requirements
- Precision stampings in various types of machining as large and small series
- Electromechanical assemblies in metal and plastic composite construction
- Plastic technology with extrusion coating of inserts or in the reel-to-reel procedure
Target market International
Employees 100
Founded 1970
EDM systems 1 Agiecut Excellence 21 Agiecut Evolution 2, automated with AstroDisc1 Agiecut Evolution 32 Agiecut Challenge 31 Agietron Impact 2, automated with AstroDisc1 Agie Mondo Star 201 Agietron 100C
Programming - 2D workstations Daveg Cadda V4- 3D workstations Unigraphics V18
Clamping systems Mecatool
Measuring, testing Measuring machines from Werth, Zeiss and Mahr
Presetting Zeiss Vista with Agie AV-Manager
Certification - ISO/TS 16949: 2002- DIN ISO 14001
Kummer
The company Kummer GmbH & Co. KG
was founded in 1970 and has since then
developed into a sound, medium-size
business with some 100 employees
working in premises extending over
7,500 sqm. with regular customers in
all important branches of industry. The
range of services includes design, tool
making and the series of precision
stampings. As a system provider, injec-
tion moulding with the metal-plastic
composite speciality is just as much
part of Kummer’s range as the versa-
tile, polished assembly technique.
Kummer offers a complete service,
from the design to the assemblies
ready for installation with documented
quality.
E EXPERIENCE 25 21.03.05 14.4.2005 9:41 Pagina 18
19AGIE experienceNo 25 April 2005
Kummer GmbH & Co. KG
Enzberger Strasse 26
D-75443 Ötisheim
Tel +49 (0)7041 95 80-0
Fax +49 (0)7041 95 80-99
info@kummer-gmbh.de
www.kummer-gmbh.de
Contact Wolfgang Hofmann, Managing DirectorJens Hofmann, Managing Director
Punching and injection moulding in one working cycleTechnical know-how, highestwillingness to work and operat-ing efficiency as well as a consis-tent market orientation havemade Kummer GmbH & Co. KG,with its four business sectors,tool making, stampings, assem-blies and plastic technology, intoa supplier with a high reputationin the electrical, automotive andaircraft industries, and also inother important branches of in-dustry. The special strong pointof the Swabia (Southwest Ger-many) based business is pro-gressive injection moulding, acarefully targeted further devel-opment of the well-known reel-to-reel method. This fully auto-matic production process wasdeveloped by Kummer them-selves, combining and reducingthe process line necessary up tonow: metal forming – extrusion-coating – metal forming into onesingle process. The interaction ofall the tools involved in the pro-duction process requires thehighest form and fitting accuracyfor all active parts. An ideal fieldof application for the use of EDmachining which has had aname at Kummer for years: Agie.
E EXPERIENCE 25 21.03.05 14.4.2005 9:41 Pagina 19
EDM for innovative injectionmoulding and punchingComplete solutions for complex componentsThe example of an electroniccomponent shows how Kummercan supply the automotive indus-try with design and productionengineering measures reliablyand cost-effectively. The elec-tronic function, size and quantityof the component are defined bythe customer. Then Kummer de-signs the form under the aspectof price optimising. Just as im-portant an influencing variable intool production at Kummer is EDmachining, for it is the machin-ing process with the highestavailability. Thus, whenever pos-sible, the construction is “EDM-friendly”. The range of machinesto hand, with 8 EDM systems,underlines EDM’s role at Kum-mer. Design itself is carried outwith modern 2D and 3D CADsystems which are in a data linkwith the CNC machines, makingrapid data access and changespossible at short notice.
The various machining steps through
which the electronic component pass-
es are to be seen from the construc-
tion drawing.
The blanking and injection moulding
tools necessary for the electronic
component are designed at the 2D and
3D CAD/CAM workstations.
20AGIE experienceNo 25 April 2005
Kummer GmbH & Co. KG
E EXPERIENCE 25 21.03.05 14.4.2005 9:41 Pagina 20
Exactly fitting ED machiningwithout finishing workAll the tools that were integratedinto the progressive injectionmoulding production process hadto meet high standards with re-gard to fitting and form accuracyin order to guarantee optimalfunctioning adjusted on one an-other. A few key figures make theprecision requirements clear:15 million components per
working life were required.0.2 µm Ra was the surface
roughness for all the active parts manufactured using ED wire cutting, such as punches and dies.
6 trim cuts were required for this.
24 VDI surface quality was achieved on all ED die sink-ing machined mould inserts.
± 5 µm position accuracy was maintained over the whole tool.
20 % approx. was the percenttime share of ED die sinking and
30 % approx. was the ED wire cutting share of the total production time for the complete progressive injection moulding tool.
The high degree of autonomy andautomation of the Agie EDM sys-tems used here more than madeup for the "slowness" of ED ma-chining due to the nature of theprocess.
Workpieces and electrodes are
prepared for the next job at the
presetting position. The AV Manag-
er software program from Agie
effectively supports this.
The EDM department at Kummer
is excellently equipped to meet all
machining and economic viability
requirements.
The process in progress is checked
and, if necessary, optimised on the
Agietron Impact ED die sinking
system.
Bending stations are incorporated
into a blanking tool module with a
graphite electrode.
In a first step in the integrated
production process, the strip is
punched.
The punched strip is then extru-
sion coated.
In a third step, the component is
equipped with the electronics and
assembled. The actual process of
progressive injection moulding is
completed with the punching out
of the component.
21AGIE experienceNo 25 April 2005
E EXPERIENCE 25 21.03.05 14.4.2005 9:42 Pagina 21
Progressive injection mouldingcombines several processesThe line production known up tonow, with punching – stamping –bending – injection moulding –taking out, is often combined intoone working cycle by the "pro-gressive injection moulding" de-veloped by Kummer. In this, theinjection cycle, as the most time-consuming process, sets therhythm for the other manufactur-ing processes, thus ensuring ab-solutely synchronous production.The advantages are sustainable:- Production tolerances are re-duced to a minimum.- Better quality results from this.- The reject rate is markedly re-duced as there is only one pro-duction process.- Handling entailing high labourcosts is completely omitted.- The production sequence isaccelerated.- Process reliability and cost sav-ing reach new dimensions.For Kummer it is thus provedthat with highly qualified employ-ees, Innovation and imaginative-ness coupled with meticulousjust-in-time logistics, the loca-tion Germany does not have to bea disadvantage. With a recentlycompleted new factory extension,Kummer is maintaining this the-ory, investing in the future.
The conventional reel-to-reel
method (above) and the progres-
sive injection moulding developed
by Kummer.
22AGIE experienceNo 25 April 2005
Kummer
View of the stations of the integrated pro-
duction process in progressive injection
moulding.
At a further station, electronic elements
are fed to the strip fully automatically
with which the component is then
equipped and assembled.
In a final phase, the electronic component
is also enclosed in a casing made of plastic.
All the electronic components are
checked by Kummer for their functioning.
Kummer’s quality management also in-
cludes the fully air-conditioned measuring
room where the electronic components are
checked using various measuring and test-
ing methods. Recorded and documented
quality proving Kummer’s high manufac-
turing standard.
E EXPERIENCE 25 21.03.05 14.4.2005 9:42 Pagina 22
We would like to thank KummerGmbH & C. KG, in particulartheir managing partnersWolfgang and Jens Hofmann, for their kind support and helpfulco-operation on this report.
Responsible
Sales Engineer:
Alfred Lirsch,
Agie GmbH
“
”
Just as we have already long been using the ED wire cutting
and die sinking systems from Agie in combined operation, with
the progressive injection moulding developed by us, we have
combined forming, bending, injection moulding and separating
into one working cycle.Jens Hofmann,
Managing Director
of Kummer GmbH & Co. KG
The tool data
Name Quadruple progressive injection moulding tool
Finished part name Electronic component
Finished part material Metal: CuSn6, silver plated
Plastic: PBT-GF 30
Tool material Punching: Hard metal
Injection moulding: Tool steel
Tool weight 700 kg
Standzeit Werkzeug 15 million
Electrode material Graphite
Electrode production High-speed milling
Cutting wire CCA 0,2 mm
Number of cuts 1 main cut, 6 trim cuts
EDM time 20% ED die sinking and
30% ED wire cutting of the total production time
Surface quality Ra 0.2 µm on the ED wire cut active parts
VDI 24 on the ED die sunk mould inserts
Position accuracy ± 5 µm over the whole progressive injection moulding tool
23AGIE experienceNo 25 April 2005
E EXPERIENCE 25 21.03.05 14.4.2005 9:42 Pagina 23
24AGIE experienceNo 25 April 2005
Country Germany
Production Injection moulding tools for the manufacture of- automotive parts such as e.g. connectors, casings,
spools- extrusion coated filter cloths- medical parts- electrical parts for the household
and communication sectorsFor this, among others, technologies such as- reel-to-reel- insert moulding as well as- two-component processes are used.
Target market International
Employees 45
Founded 1984
EDM systems 1 Agiecut Challenge 21 Agiecut 1202 Agietron Innovation 2 with a 28-space electrode changer
Programming - Peps 5.0- Agievision PC
Clamping systems - Mecatool ICS- System 3R
Measuring, testing - Zeiss C 400 U-Soft AV-Manager- Mitutoyo optical measuring system- Mauser measuring device
Karl-Heinz Müller KG
Mühlrainstrasse 5-7
D-72336 Balingen-Engstlatt
Germany
Tel +49 (0)7433 26005-0
Fax +49 (0)7433 26005-29
info@formenbau-mueller.de
www.formenbau-mueller.de
Contact Karl-Heinz Müller, Managing DirectorHarry Fünfer, Manager
Karl Heinz Müller Formenbau
The company based in Swabia in Southwest Germany
was founded in 1984 and today has 45 employees on its
payroll. Karl-Heinz Müller KG sees its core competence
in technical mould making for the automotive, household
appliance and medical branches.
E EXPERIENCE 25 21.03.05 14.4.2005 9:42 Pagina 24
25AGIE experienceNo 25 April 2005
Using ED die sinking in an innovativemanner in technical mould making
A partner for the highestdemands In 1984, the young entrepreneur,Karl-Heinz Müller, founded thecompany bearing his name formaking moulds for injectionmoulded parts. His goal: To bring the knowledge he hadacquired and expanded into hiscompany with humanity and thehighest conscientiousness. Thathe has succeeded in doing this isshown by the record of successsince the company came intoexistence. With high quality stan-dards, 45 highly motivated em-ployees, a modern machine outfitand the constant will to best per-formances, Karl-Heinz Müller KGhas created a circle of customers
for itself who acknowledge thistoday with demanding orders. Aplug from the automotive branchcomposed of two parts showsthe company’s extensive know-how and performance spectrum,and how it employs EDM as aninnovative machining process intechnical mould making.
3D-presentation of the mould core
which is led through a mould wedge
when closing the injection moulding
tool. The colours mark the individual,
ED machined elements.
On the finished automobile plug, the
inlet slit is to be seen into which the
plug’s second, red component is
inserted. A snap then holds the cable
securely in the plug casing.
The plug is designed to suit the tool
at the CAD workplace and the opti-
mum functionality is checked.
ED wire-cut mould cores create the
cable channels on the finished part
during injection moulding.
One of the mould inserts for the
quadruple injection moulding tool.
E EXPERIENCE 25 21.03.05 14.4.2005 9:42 Pagina 25
26AGIE experienceNo 25 April 2005
Karl-Heinz Müller KG
The challenge lay in the detailsWhen Karl-Heinz Müller KG wonthe order to manufacture a toolfor the production of automobileplugs, the requirements were sethigh:- A complex mould with manyopenings, undercuts, fine websand filigree details, which ap-peared difficult to remove fromthe mould.- A surface quality of VDI 24 anda positioning accuracy of ± 10µm of all moulds to one another.Already at the time of the design,the injection moulding tool wasarranged as a quadruple mould,and the details for a productionto suit the tool were optimisedtogether with the customers.Then the various machining pro-cedures were determined in ac-cordance with time and precisioncriteria. On account of their highrepeating accuracy and autono-my, ED die sinking and wire cut-ting were planned for the ma-chining of the mould and activeparts giving precision. Thepreparation of the job when EDdie sinking involved:- Milling and ED wire cutting thecopper electrodes, the shaping ofwhich was generated from theCAD programs.- Clamping and plotting the elec-trodes.- Palletised clamping of theworkpieces and then plotting atthe presetting position.- Transfer of the measurementdata to the Agietron Innovation.- Loading the 28-places elec-trode changer and setting up theworkpiece pallets on Agietron In-novation.Those in brief were the workingsteps that were carried out be-fore ED die sinking. Here too,Karl-Heinz Müller KG attachedthe greatest importance to acontinuous check of precision.
In the case of large-area and
large-volume moulds, hard
milling is used.
Operators on one of the
Agietron Innovation 2 and
on an Agiecut Challenge 2
optimise their programs.
A composite mould is ED
die sunk.
One of the four moulds of the
quadruple injection moulding
tool, which opens and shuts
on all four sides via slides.
In this connection. the long
mould cores for the cable
channels are led through the
wedge-shaped web in the
middle.
All active parts had to fit 100 percentYears of experience enabled theoperators of the two AgietronInnovation to optimise the EDMprogram in accordance with themachining assignment and toadjust the setting parameters.The Agievision control offers nu-merous possibilities of individualinterventions for this which canthen be checked by Graficheck.The mould inserts were adjustedto measure and ED re-machinedif necessary. 100 percent mouldand fitting accuracy of all activeparts was the challenge so thatall the elements would interactexactly during the injectionmoulding tool’s closing andopening processes. ED wire cutmould cores, which were ledthrough a separating wedge,mould inserts with complex cavi-ties which move to the side andthe nozzle side that opens at thefront. And everything quadruple.Technical mould making whichwas implemented in an innovativemanner by Karl-Heinz Müller KGand has been confirmed by satis-fied customers.
E EXPERIENCE 25 21.03.05 14.4.2005 9:42 Pagina 26
The tool data
Name Quadruple injection moulding tool with 16 slides, runner-less hot channel construction
Finished part name Plug for automobiles
Finished part material Non-reinforced PBT
Surface quality finished part VDI 24
Tool material Hardened, high-alloy tool steels
Tool weight 600 kg
Tool working life c. 20 million parts
Electrode material Copper
Electrode production ED wire cutting and milling
EDM time 500 hours ED wire cutting and 350 hours
ED die sinking are equal to 35% of the total production time
Positioning accuracy ± 10 µm over the whole tool
Surface roughness VDI 22 ED die sinking, VDI 18 ED wire cutting
We would like to thank Karl-Heinz Müller KG, in particulartheir Managing Director Karl-Heinz Müller and the ManagerHarry Fünfer, for their kind sup-port and helpful co-operationon this report.
Responsible
Sales Engineer:
Holger Hertsch,
Agie GmbH
“
”
We use ED die sinking and wire cutting as equivalent machin-
ing procedures in technical mould making. Thus we can fully
exploit the Agie EDM systems’ high repeating accuracy and
precision, and, thanks to these units’ great autonomy, sched-
ule many jobs for the night and weekend shifts.
Karl-Heinz Müller,
Managing Director
of the company of the same name
27AGIE experienceNo 25 April 2005
E EXPERIENCE 25 21.03.05 14.4.2005 9:42 Pagina 27
28AGIE experienceNo 25 April 2005
Country Switzerland
Production Micromechanics, punching tools, EDM and micro EDM and punched products for:- the watch industry- microelectronics- medicine- special applications
Target market Switzerland
Employees 4
Founded 1974
EDM systems 1 Agiecut Vertex1 Agiecut 150 HSS1 Agiecut 100D+F 1 Agietron Compact 1 Micro
Programming Mecanic
Clamping systems System 3R
Measuring, testing Profile projector
Etampes Kaufmann SA
Postfach 43
Route de Châtel-St-Denis
CH-1802 Corseaux/Vevey
Switzerland
Tel +41 (0)21 921 70 90
Fax +41 (0)21 921 46 96
etampes.kaufmann@bluewin.ch
www.etampes-kaufmann.ch
Contact Pierre Kaufmann, OwnerYves Kaufmann, Technical Director
Etampes Kaufmann SA
The family-owned
company Etampes
Kaufmann SA can
look back over 30
years of company
history which is
closely linked with
the Swiss watch
industry. So micro-
mechanics, micro-
EDM, punching
tools and punched
products in the high
precision sector
have become the
company’s real
speciality.
E EXPERIENCE 25 21.03.05 14.4.2005 9:42 Pagina 28
A family-owned company with a passion for high precision Not far from Lake Geneva lies thewine-growing village Corseauxwhere Etampes Kaufmann SA isbased. Founded by the seniorchief Pierre Kaufmann in 1974,the family-owned company hasspecialised in two sectors:- High-precision punching tools- Micro-punched products- Special products.Etampes Kaufmann SA suppliesworld-renowned manufacturers inthe watch industry, microelectron-ics and medicine. The success ofthe Canton Vaud-based businesslies in the high precision withwhich it manufactures punchingtools and the punched parts pro-duced. With decades of experi-ence, Etampes Kaufmann SA hasperfected its tool-making everyfurther, investing in an EDM wire-cutting system of the highest pre-cision, and can thus follow theminiaturisation trends effortlessly.Just how skilfully EtampesKaufmann SA moves in the mi-crotechnology sector is shown bythe example of a punching toolfor the production of printed-circuit boards made of metal-coated Kapton.
The lower half of the
progressive punching
tool with the blanking
die.
Prepunched strip made
of Kapton which is then
metallically coated and
punched once again.
The contours for the
EDM wire-cutting pro-
gram are generated
with Mecanic.
29AGIE experienceNo 25 April 2005
EDM wire cutting at the peak of precision
E EXPERIENCE 25 21.03.05 14.4.2005 9:42 Pagina 29
The Agiecut Vertex is set up
for the next EDM job.
The erosion is simply per-
formed on the Agiecut Vertex
The contour accuracy is
checked both on punched
parts and on the active parts
of tools.
The thinner the punchingmaterial, the smaller the die clearanceWell-known for its high precisionin punch tool-making, EtampesKaufmann SA received the orderfor the manufacture of one ofthese tools for punching thethinnest films made of Kapton.After receiving the printed circuitboard drawing from the cus-tomer. the further procedure wasas follows:- Generation of the cutting con-tours for dies and punches withMecanic. - Making the starting holedrilling in the 10 mm thickblanking die with the EDM die-sinking machine Agietron Com-pact 1 Micro, a variant speciallyfor micromachining jobs.- Transfer of the geometry pro-grams to the EDM wire-cuttingsystem Agiecut Vertex.- Purposeful data input with afew details on the workpiece,wire and precision.- Allocation of the contour pro-grams to the EDM programs.- Automatic generation of thebest EDM wire-cutting technolo-gy in accordance with time andprecision criteria.- Horizontal and vertical plottingof the workpiece with wire andthe integrated touch probe. WithAgiesetup 3D, automatic conver-sion of the measurement data,correct for the location, into theEDM program.- Check of all inputs for com-pleteness with Formalcheck.- For safety’s sake, further checkof the EDM sequences with Gra-ficheck.- Loading the Agieduo wire unitwith a spool of wire type CCA 0.1 mm and with a spool of wiretype SP-Wire 0.05 mm. AgiecutVertex has a wire guide for alldiameters.
The ED wire-cutting system wasthus ready to start with the fullyautomatic machining of the diesin unsupervised operation.
30AGIE experienceNo 25 April 2005
Etampes Kaufmann SA
E EXPERIENCE 25 21.03.05 14.4.2005 9:42 Pagina 30
Name Progressive punching tool
Finished part name Printed circuit boards
Finished part material Metal-coated Kapton
Tool material Steel, hard metal in the case of active parts
Tool weight 30 kg
Tool working life 10 - 15 million
Number of EDM cuts 1 full cut, 7 trim cuts
Punch cutting height 10 mm cylindrical
Die cutting height 10 mm, 1 mm of this cylindrical and 9 mm tapered 0.1°
EDM wire Full cut: CCA 0.10 mm, Trim cuts: SP Wire 0.05 mm
Surface quality Ra 0.08 µm
Positioning accuracy ± 2 µm over the whole tool
The tool data
We would like to thank Etam-pes Kaufmann SA, in particu-lar the company’s ownerPierre Kaufmann, for theirkind support and helpful co-operation on this report.
Responsible
Sales Engineer:
Olivier Beutler,
Agiesales Ltd.
“
”
With the Agiecut
Vertex, we have
now got the EDM
wire-cutting ma-
chine that meets
our application re-
quirements exactly:
Highly precise,
compact in its di-
mensions and very
reliable. The dou-
ble spools are also
ingenious so that
we can carry out
the full cut with
standard wires and
trim cuts with the
finest wires, unsu-
pervised.
Yves Kaufmann,
Technical Director
of Etampes Kaufmann SAThe cutting wire is half as thin as a hairFirstly, all the full cuts were nowexecuted with the CCA 0.10 mmwire, whereby a tiny web was leftin place in each case to connectthe drop-out parts. With morethan 70 openings, reliable wirethreading was indispensable.Then 7 trim cuts were carried outusing the finest 0.05 mm SP-Wire,whereby the webs were also cutthrough with the last cut. Many
31AGIE experienceNo 25 April 2005
openings were also carried outusing the pocketing process, asthe drop-out parts would havebeen too small. With surfaces ofRa 0.08 µm and a positioning ac-curacy of ± 2 µm of all openingsto one another, the EDM resultseven exceeded the given preci-sion requirements.
E EXPERIENCE 25 21.03.05 14.4.2005 9:42 Pagina 31