TÜNKERS KN 40 UZ User manual

Underbody Clamp Operating instructions
(from week 14/2015)
KN 40 / 40.1 UZ/B
Subject to technical modifications. 14.11.2018
TÜNKERS®Maschinenbau GmbH Am Rosenkothen 8 • D-40880 Ratingen Tel. [phone] • Fax [phone] Internet www.tuenkers.de
1. Description
The Underbody clamp is a high-performance tool, which is
designed for clamping tasks in metal processing. It consists of a
pneumatic cylinder, a metal case with front and back attachment
options and a centering mandrel with an integrated tension hook.
The pneumatic cylinder influences on one or two tension hooks
during the clamping process, which clamp the work piece guided
by a platform. The position control of the clamping arm is optional
via an integrated inductive query.
2. Safety
The Underbody clamp is not designed as a ready-to-use
freestanding tool, and is therefore not equipped with its own safety
devices. Only through the proper installation in a manufacturing
system and the establishment of a corresponding safety control
unit are the technical safety requirements fulfilled.
Shut down the Underbody clamp immediately in the event of any
malfunction that is likely to affect personal safety. Maintenance
work may only be performed by properly trained skilled personnel -
while the equipment is shut down.
Ensure that all safety devices are refitted correctly after
maintenance work has been carried out.
Maximum load depends on diameter of dowel pin and geometry of
the hook.
3. Assembly of the Underbody clamp
Installation of the clamp via 4 cheese-head screws on the front
or back support surface.
Create a compressed air supply between the pneumatic
control unit and the clamp (connections "N").
Caution: The use of external flow control valves is
recommended for the fine tuning of the speed of the clamping
process.
If using magnetic switches, assemble and connect these.
Inductive query (T12)
Attach the electric coupling according to the electric construction
of the pneumatic clamp to the connection plug "C" and tighten.
Attention: When operating a KN 40 UZ version „B“ the adjusting
screw „A“ must be set to position „V“ (see pic. 3) so that the
blocking system is activated.
Caution: An operation with the incorrect or excessive voltage may
result in short circuiting and physical injuries.
The function check of the integrated LED is as follows:
green................... Operating voltage
yellow.................. Clamp open
red ...................... Clamp closed
4. Adjusting the Underbody clamp
Caution! Risk of crushing injuries!
There is danger of fingers being crushed or amputated during
adjustment of the clamping hook! Do not reach into the swivel area
of the clamping hook while the Underbody clamp is operating.
Interrupt the compressed air supply prior to working in the tool
area.
Move the Underbody clamp to the open position, clamping
hook is retracted in centering pin.
Place the work piece on the centering pin and move to the
desired position.
Move the clamp with compressed air to the closed position, so
that the clamping hooks contact the work piece.
If the end position is not shown by the position check of the
switches (clamp closed, LED red), the placement of the work
piece (adjusting plate, base plate) must be corrected
accordingly.
5. Blocking system „B“
KN 40 UZ clamps version "B" are equipped with a mechanical
blocking system acting in „open“-direction. In case of a
spontaneous failure of the compressed air supply, the movement
of the clamp arm in "open" direction will be prevented.
Operating mode:
The blocking system consists of balls which are arranged in a
cone concentric to the piston rod. The balls are pressed into the
cone by spring force. This leads to jamming of the piston rod in
the intended movement direction for opening.
N
C
D
Pic. 1: KN 40 UZ
Pic. 2: Blocking system „B“
manual
release
release piston
spring
ball
cone

Underbody Clamp Operating instructions
(from week 14/2015)
KN 40 / 40.1 UZ/B
Subject to technical modifications. 14.11.2018
TÜNKERS®Maschinenbau GmbH Am Rosenkothen 8 • D-40880 Ratingen Tel. [phone] • Fax [phone] Internet www.tuenkers.de
The blocking is released automatically with the pneumatic control of
the clamp in "open" direction.
At zero pressure the clamping of the piston rod on the return side is
available in any position of the clamp arm
Release of the Underbody clamp Version “B”
For maintenance, the blocking mechanism can be released
manually. For this purpose set adjusting screw (bolt) “A” from
position “V” to position “NV”.
Caution! The clamping hook may move unpredictably when
actuating the manual release.
6. Replacement of the monitoring cassette
Dismantle the monitoring cassette by releasing screw "D".
Adjust a new monitoring cassette and assemble.
7. Maintenance
The Underbody clamp is fitted with low-maintenance bearings and
guides designed for operation in large-scale series production.
Based on the enclosed design, special maintenance of the
Underbody clamps is not required.
Caution: Cleaning with a high-pressure steam cleaner or dry ice
will result in damaging the Underbody clamp.
Underbody Clamp version „B“:
In regular intervals, at least every 100,000 cycles, the blocking
system must be tested at its function. For this purpose, the
clamping hook must be set to clamped position and the clamp
must be placed into the pressure-less state. The blocking function
is ensured if the clamping hook holds its position despite of an
application of external force.
Pic. 3: KN 40 UZB
V
NV
blocked
released
releasing
clamping
A

Detection set Inductive switch, 1 output
T12
----
Subject to technical modifications. 14.11.2018
TÜNKERS®Maschinenbau GmbH Am Rosenkothen 8 • D-40880 Ratingen Tel. [phone] • Fax [phone] Internet www.tuenkers.de
yellow
- open/back -
green
red
- closed/forward -
Technical Specifications
Inductive switch (Standard version)
Short circuit proof
Rated voltage 10-30 V
Working current 32 mA ( one initiator connected with PLC)
Closer PNP exit