Suspension strut hole punch
with servo-electric drive
Suspension strut hole punch
Current solution
Hole punch as a
C-frame system
driven by a hydraulic
cylinder

Hydraulic aggregate
operating up to
two clamps

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NEW: suspension strut hole punch
with servo-electric drive
 The hydraulic cylinder is replaced by a power unit controlled
via a servo-electric motor
 The new e-cylinder is compatible with the current C-frame system with
hydraulic cylinder and easy to change
 Through the e-motor, the entire hydraulic supply including aggregate,
supply lines and control can be dispensed with
Advantages:
- cost savings
- no risk of oil leakage
- less plant components = less potential for failure / breakdown
- easier maintenance
- better control of the punching process, integrated process monitoring
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Comparison
Hydraulic and electric cylinder
Comparison of widths
Comparison of lengths
Conclusion:
- identical flanging
- double in height
Hydraulic cylinder
Electric cylinder
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Design principle of suspension strut
hole punch with servo-electric drive
Drive element
C-frame with spring adjustment,
unchanged
Hole punch
Guidance, unchanged
Die
Slugs
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Detail of the drive unit
Performance data:
Single-stage
reduction
gear unit
Force Fmax= 150 kN
Reduction gear unit
Module m = 5
Transmission i = 0.62
Electric motor (here: SEW)
n = 2000 R/min
Robust roll spindle
48 x 5 for transmission of
the high process forces
and shocks, caused by
the cutting stroke
Servo-electric
drive
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Process monitoring as a “by-product“
of servo control
Basis:
 Required hardware:
Control card and control panel.
A software programme is used which
establishes a connection to the converter and
controls it. The power consumption of the
motor is monitored during the punching
process and it is saved every 1/10 mm.
Envelope:
 An envelope is defined in advance with the aid
of the sofware, determining the relevant
maximum and minimum process values for an
OK part.
 The actual current values are compared with
the predefined envelope parameters during the
punching process, and the punching process
is evaluated on this basis.
 Process feedback or process interruption as
soon as the signal is outside of the envelope,
e.g. in the event of tool breakage, heavy
wear on tools, incomplete punching of
componenent and wrong component.
Force
= Power input
Envelopes
1.
Process signal
faulty, e.g. wrong
pairing of sheet metal
2.
Process signal
OK
3.
Process force faulty,
e.g. tool breakage
Path
(signal from
servo drive)
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Detail: Process Monitoring 1
Monitoring of the force/path signal = current draw / motor speed signal
Example: faulty process
Envelope
upper limit
Signal path
outside the
envelope!
Process signal
Envelope
lower limit
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Detail: Process Monitoring 2
Monitoring of the force/path signal = current draw / motor speed signal
Example: punching process OK
Envelope
upper limit
Punching
process
within the
envelope!
Process signal
Envelope
lower limit
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Servo-electric power cylinder
Further applications
Hole punching suspension
strut dome
- Central hole
e. g. Ø 34.2 mm
- 3 x mounting holes
Ø 11.2 mm
 Punching
- Antenna hole, reversing camera,
suspension strut dome, front panel
hole punching
 Stamping
- Serial numbers, shift stamps,
part number, date
 Clinching
- Joining metal parts by
clinching
fixed die
movable die
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Please contact us should you have any queries.
See the table on the following page for a representative in
your country.
Thank you.
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Contact List
TÜNKERS Group ‐ Local Sales Contacts
Country
Company Name
Sales Contact
E‐Mail
Phone
Argentina
WorkTech S.R.L.
Raul Giacche
[email protected]
+54 11 42535000
Australia
Romheld Australia Pty. Ltd.
David Shanahan
[email protected]
+61 2 97211799
Brazil
Tünkers do Brasil Ltda.
Lucio Alcantara
[email protected] +55 1140563100
China
Tunkers Machinery & Automation
Rex Wang
[email protected]
+86 2139171070820
Eastern Europe (Czech Republic / Poland / Hungary / Slovakia)
Tünkers ‐ Sales Office East
Dieter Rauschenbach
[email protected]
+49 3673842432
France
Tünkers France / SOPAP
Laurent Norjoux
[email protected]
+33 688418200
Germany
Tünkers Maschinenbau GmbH
Sales Center
[email protected]
+49 2102 4517 0
India
Tünkers Maschinenbau GmbH India
Jayesh Keskar
[email protected]
+91 2025380540
Iran
Iran Industries Support
Amir Khoshsokhan
PRESIDENT@IIS‐CO.COM
+98 2188513371
Italy
Tünkers‐Expert Italia
Renato Tosco
[email protected]
+39 0115508264
Japan
Tünkers Japan / ROHAL
Tomoo Kaku
[email protected]
+81 336699407
Maroc
MAN CONSULTING sarl
Michel Andre
[email protected]
+212 657593160
Mexico
Tünkers‐Expert Mexico Christian Volkmann
[email protected]
+52 2224850708
Romania / Serbia
S.C. Clamping Systems S.R.L
Cristi Miclea
[email protected]
+ 40 359451966
Russia
West‐RU
Vladimir Tikhomirov
vt@west‐ru.ru
+7 8312200710
Scandinavia (Denmark / Finland / Norway / Sweden)
Berga Maskin AB
Niels Nielsen
info@berga‐maskin.se
+46 15831112
South East Asia (Indonesia / Malaysia / Thailand / Philippines / Vietnam)
DAB Technology
Bryan Chua
[email protected]
+60 166623836
South Africa
Demcon (Cape) cc
Peter Attinger
[email protected]
+27 414847411
South Korea
JC Systems Co. Ltd.
JH Cho
[email protected]
+82‐70‐7012‐0891
Spain / Portugal
TÜNKERS IBÉRICA S.L.
Luis Tullio
[email protected]
+34 933952827
Turkey
CAVA Makina Ltd.
Enver Catak
[email protected]
+90 2165400130
UK & Ireland
Tunkers Expert UK Ltd
David Shaw
[email protected]
+44 1384287690
USA / Canada
Tunkers‐Mastech
Christian Heyer
[email protected]
+1 7347445990
For full contact details, please access our website ‐‐> http://www.tuenkers.com/company/subsidiaries‐and‐agencies/mn_44527
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