SCHUNK UFG 26 User instructions

Assembly- and Operating Manual
for
3-Jaws-Loading-Gripper Type UFG 26 / 32
Dear Customer,
Congratulations on choosing a SCHUNK product. By choosing SCHUNK, you have
opted for the highest
precision, top quality and best service.
You are going to increase the process reliability of your production and achieve
best machining results – to the customer‘s complete satisfaction.
SCHUNK products are inspiring.
Our detailed assembly and operation manual will
support you.
Do you have further questions? You may contact us at
any time – even after purchase. You can reach us directly at the below mentioned
addresses.
Kindest Regards,
Your SCHUNK GmbH & Co. KG
Precision Workholding Systems
03/UFG26-32/en/14.11.2011 K
SCHUNK GmbH & Co. KG
Spann- und Greiftechnik
Bahnhofstr. 106-134
74348 Lauffen/Neckar
Deutschland
Tel. [phone]
Fax [phone]
[email protected]
www.schunk.com
AUSTRIA: SCHUNK Intec GmbH
Tel. [phone] · Fax [phone]
[email protected] · www.at.schunk.com
BELGIUM, LUXEMBOURG:
SCHUNK Intec N.V. / S. A.
Tel. [phone] · Fax [phone]
[email protected] · www.be.schunk.com
CANADA: SCHUNK Intec Corp.
Tel. [phone] · Fax [phone]
[email protected] · www.ca.schunk.com
CHINA: SCHUNK Intec
Precision Machinery Trading (Shanghai) Co., Ltd.
Tel. [phone] · Fax [phone]
[email protected] · www.cn.schunk.com
CZECH REPUBLIC: SCHUNK Intec s.r.o.
Tel. [phone] · Fax [phone]
[email protected] · www.cz.schunk.com
DENMARK: SCHUNK Intec A/S
Tel. [phone] · Fax [phone]
[email protected] · www.dk.schunk.com
FINLAND: SCHUNK Intec Oy
Tel. [phone] · Fax [phone]
[email protected] · www.fi.schunk.com
FRANCE: SCHUNK Intec SARL
Tel. [phone] · Fax [phone]
[e-mail] · www.fr.schunk.com
GREAT BRITAIN: SCHUNK Intec Ltd.
Tel. [phone] · Fax [phone]
[email protected] · www.gb.schunk.com
RUSSIA: OOO SCHUNK Intec
Tel. [phone] · Fax [phone]
[email protected] · www.ru.schunk.com
SLOVAKIA: SCHUNK Intec s.r.o.
Tel. [phone] · Fax [phone]
[email protected] · www.sk.schunk.com
SOUTH KOREA: SCHUNK Intec Korea Ltd.
Tel. [phone] · Fax [phone]
[email protected] · www.kr.schunk.com
SPAIN, PORTUGAL: SCHUNK Intec S.L.U.
Tel. [phone] · Fax [phone]
[email protected] · www.es.schunk.com
SWEDEN: SCHUNK Intec AB
Tel. [phone] · Fax [phone]
[email protected] · www.se.schunk.com
SWITZERLAND, LIECHTENSTEIN:
SCHUNK Intec AG
Tel. [phone] · Fax [phone]
[email protected] · www.ch.schunk.com
TURKEY: SCHUNK Intec
Tel. [phone] · Fax [phone]
[email protected] · www.tr.schunk.com
USA: SCHUNK Intec Inc.
Tel. [phone] · Fax [phone]
[email protected] · www.us.schunk.com
HUNGARY: SCHUNK Intec Kft.
Tel. [phone] · Fax [phone]
[email protected] · www.hu.schunk.com
INDIA: SCHUNK Intec India Private Ltd.
Tel. [phone] · Fax [phone]
[email protected] · www.in.schunk.com
ITALY: SCHUNK Intec S.r.l.
Tel. [phone] · Fax [phone]
[email protected] · www.it.schunk.com
JAPAN: SCHUNK Intec K.K.
Tel. [phone] · Fax [phone]
[email protected] · www.tbk-hand.co.jp
MEXICO, VENEZUELA:
SCHUNK Intec S.A. de C.V.
Tel. [phone] · Fax [phone]
[email protected] · www.mx.schunk.com
NETHERLANDS: SCHUNK Intec B.V.
Tel. [phone] · Fax [phone]
[email protected] · www.nl.schunk.com
NORWAY:SCHUNK Intec AS
Tel. [phone] · Fax [phone]
[email protected] · www.no.schunk.com
POLAND: SCHUNK Intec Sp.zo.o.
Tel. [phone] · Fax [phone]
[email protected] · www.pl.schunk.com
Reg. No. 003496 QM08 Reg. No. 003496 QM08

TABLE OF CONTENTS
Page
1. Unpacking and Control 3
2. Brief description and technical data
4
3. Assembly and connection 5 – 6
3.1 Assembly 5
3.2 Connection 6
4. Proximity Switches 7 – 8
4.1 Notes on proximity switches 7
4.2 Assembly and adjustment of proximity switches
8
5. Maintenance 9
6. Trouble shooting 9
7. Optional: with pneumatic actuation 10
Page -2-

1. Unpacking and Control
1) Carefully remove the packing without using sharp or peaked objects.
2) Check the gripper on transportation damages and if necessary, inform us immediately.
Volume of Delivery:
- UFG (without top jaws and pressure piece)
- 2 O-Rings Ø 6 x 2 mm
- 3 screws M 8 x 35 DIN EN ISO 4762 (UFG 26)
- 3 screws M 8 x 40 DIN EN ISO 4762 (UFG 32)
NOTE:
For intermediate stocking please note:
- keep dry
- protect the unit against aggressive medias
- avoid strong fluctuations in temperature
- lubrify smooth surfaces
- seal connection bores
Illustration: UFG 26 with pressure
piece and special top jaws.
Page -3-

2. Brief description and technical data
3-Jaw-Loading-Gripper Type UFG 26 / 32:
– broad clamping range
– flat design
– high clamping force
– versatile application (e.g. for loading of tooling machines)
– can be retrofitted as a double gripper without problems
– position of installation: application dependant
– stroke control can be continiuously adjusted
– I.D. and O.D. clamping possible
– centrically gripping
Accessories:
– proximity switch
– pressure piece
– top jaws (custom-made solutions available from SCHUNK)
Technical Data:
Page -4-
UFG 26 UFG 32
Actuation: hydraulically hydraulically
Range of operating temperature:
6...60 bars 6...70 bars
Opening stroke: 32 mm / jaw 54 mm / jaw
Gripping force
: at 40 bars 2300 N at 50 bars 5200 N
Gripping force : at 6 bars 350 N at 6 bars 500 N
Operating temperature: 5 ϒC - 60 ϒC 5 ϒC - 60 ϒC
Oil volume: “open”
34 ccm 87 ccm
Oil volume: “closed” 29 ccm 78 ccm
Opening time: 0.9 sec. 2.1 sec.
Closing time: 0.85 sec. 2.0 sec.
Repeatability 0.05 mm 0.05 mm

3. Assembly and Connection
3.1 ASSEMBLY NOTE:
The gripper must be aligned during assembly
since it is not equipped with fixing bores.
3 fastening threads
UFG 26 M 8 x 17
UFG 32 M 8 x 20
3 Fastening bores
for M8 DIN EN ISO 4762
in the plastic bag
Page -5-

3. Assembly and Connection
NOTE:
For assembly without hoses, please use two O-rings
out of the little plastic bag to seal the oil feeding.
Close the oil feedings which you won’t use with a
suitable blind plug (M 6, R1/4”).
For direct connection
without hoses
3.2 CONNECTION
"open"
"closed"
2 x M 6 for direct connec-
tion without hoses
2 x R1/4” for connection
with threads
Page -6-
"closed" "open"
M 6
1.5
Ø 6
Ø 10
Gripper
O-ring
Ø 6 x 2
Adaptor

braun
load
Last
Closer
Öffner
schwarz
blau
blue
brown
black
Bending radius of the cable: 10 x cable diameter
4.1 NOTES ON PROXIMITY
SWITCHES
Technical Data:
– Supply voltage: 10 - 30 V DC
– Operation voltage: max. 15 %
– Max. load current: 200 mA
– Hysterisis: 15% of nominal
sensing distance
– Range of temperature: - 25°C to + 70°C
– Max. operating frequency: 1000Hz
– Voltage drop: 1.5V
– Protection class as per
DIN EN 60529: IP 67*
* only for concentric plug connector when fixed properly
4. Proximity Switches
2 pieces
Page -7-
Type Output Id.-No.
INW 80/S Closer 301 508
Sensing distance 1.5 mm
32
M 8x1
Dimension in pluged-in position appr. 60 mm
42.1
13
10 10 Ø 14.5
Plug length
appr. 10 mm
2 LED's
– switching position
– power supply
available
M 12 x1
300
Ø 3.5
Proximity
switch
M 12x1
Ø14.5
31
50
Ø 5
cable length
3 m
Principle design and dimensions
Output:
shown in non-actuated condition
Do not swing the proximity switch by its
cable.
Do not allow the sensor to make contact with
a detectable object of a hard substance or
do not apply shock to the sensor
Avoid using the proximity switch in
outdoor locations (subject to direct
sunlight, rainwater, etc.)
Do not tighten the proximity switch
excessively.
Avoid using the proximity switch in an
atmosphere of chemicals, especially strong
alkali acid (such as nitric acid, chromic acid,
hot concentrated sulfune acid, etc.)
Do nit pull the wire of the proximity switch
with excessively large force.

4.2 INSTALLATION AND ADJUSTMENT
OF PROXIMITY SWITCHES
NOTE:
Proximity switches are accessories and have to be
ordered separately.
The positions on the switch are freely chooseable.
If SCHUNK proximity switches with plug-connectors
4. Proximity Switches
Cable of the
proximity switch
PG-screw connec-
tion
Cover
Proximity switch
Jamming piece
(max. 100 Ncm)
Cyl. screw for adjust-
ment of the interroga-
tion position
are used, the PG-screw connections have to be
disassembled and the components have to be
pushed over the proximity switch onto the cable.
Adjustment and interrogation of the position:
a) Turn the cyl. screw clockwise:
– The control cam is moving into the
direction of the screw head.
b) Turn the cyl. screw anti-clockwise:
– The control cam is moving away from the
screw head.
Counter nut
(secured cyl. screw)
Control cam
Page -8-

NOTE:
For exchange of components please return the
complete gripper with a repair order to SCHUNK.
In order to achieve proper function of the grippers,
please note the following:
1) Make sure that the blank steel components
are lubrified or greased.
2) Lubrify the base jaws of the gripper every
500.000 cycles with Molykote BR2 plut,
Metaflux-Gleitmetall or any equivalent lubri-
cant. The funnel-type lubrication nipple DIN
3405 AM 8 x 1 are at the base jaws.
The jaws do not move:
– The hydraulic supply is interrupted.
– Break of screws at the connection between
the piston bar and the base jaw.
– The connections are misaligned.
The clamping force reduces:
– Break of screws at the connection between
the piston bar and base jaw.
– There is dirt and dust between the
guidances of the base jaws.
– Internal oil leakage
OiI leakage at the bottom:
– Set-screw M 6 for direction connection
without hoses is not sealed correctly
(see page 5).
Page -9-
5. Maintenance 6. Trouble shooting

Page -10-
7. Optional: with pneumatic actuation
Pneumatic actuation for UFG 26 = Type UFG-P 26
Note: If requested, we can supply a spare-and wear-part list.
Gripper side is identical
with hydraulic version
UFG 26
pneumatic air
feeding side

Page -11-
7. Optional: with pneumatic actuation
Pneumatic actuation for UFG 32 = Type UFG-P 32
Note: If requested, we can supply a spare-and wear-part list.
Gripper side is identical
with hydraulic version
UFG 32
pneumatic air
feeding side

Translation of original EC declaration of incorporation
EC declaration of incorporation
In terms of the EC Machinery Directive 2006/42/EC, annex II, Part B
Manufacturer/
distributor
SCHUNK GmbH & Co. KG.
Spann-und Greiftechnik
Bahnhofstr. 106 –134
D-74348 Lauffen/Neckar
We hereby declare that the following product:
Product designation 3-Jaws-Loading-Gripper
Type designation: UFG 26, UFG 32
ID numbers: 302715, 302716
meets the applicable basic requirements of the Directive Machinery (2006/42/EC).
The incomplete machine may not be put into operation until conformity of the machine into which the
incomplete machine is to be installed with the provisions of the Machinery Directive (2006/42/EC) is
confirmed.
Applied harmonized standards, especially:
EN ISO 12100-1 Safety of machinery -Basic concepts, general principles for design
Part 1: Basic terminology, methodology
EN ISO 12100-2 Safety of machinery - Basic concepts, general principles for design
Part 2: Technical principles
The manufacturer agrees to forward on demand the special technical documents for the incomplete
machine to state offices.
The special technical documents according to Annex VII, Part B, belonging to the incomplete
machine have been created.
Person responsible for documentation: Mr. Michael Eckert, [phone]
Location, date/signature: Lauffen, Germany, January 2011 p.p.
Title of the signatory Director for Development