Rohm KZF Serie Instrucciones De Servicio página 8

8. Rigidity of the workpiece to be clamped
The material to be clamped should possess a rigidity suitable
for the clamping force involved and should only be minimally
compressible if secure workpiece clamping under the
machining forces which occur is to be ensured.
Non--metallic material (e.g. plastic, rubber, etc.) may only be
clamped and machined with the express written permission of
the manufacturer!
9. Fixing and replacing screws
Inferior replacements or inadequate fixing of screws which are
being changed or become loose can lead to risks of both injury
to personnel and material damage. It is therefore imperative
that, unless otherwise expressly specified, only such torque as
expressly recommended by the screw manufacturer and suita
ble for the screw quality be applied when tightening fixing
screws.The following torque table applies for the common sizes
M5 -- M24 and qualities 8.8, 10.9 and 12.9:
Tightening torques in Nm:
Güte M5 M6 M8 M10 M12 M14 M16 M18 M20 M22 M24
8.8 5,9 10,1 24,6 48 84
10.9 8,6 14,9 36,1 71 123
12.9 10 17,4 42,2 83 144
Screw quality 12.9 should be selected in cases of doubt when
replacing original screws. 12.9 quality should be selected in all
cases involving fixing screws for clamping inserts, top jaws,
fixed stops, cylinder covers and similar elements.
All fixing screws which, due to the purpose for which they are
intended, are loosened frequently and must then be tightened
again (e.g. during conversion work) should have their threads
and the bearing surface of their heads coated with a lubricating
medium every six months (grease paste).
Even securely tightened screws can become loose under
adverse outside conditions such as, for instance, vibrations. In
order to prevent this happening, all safety--related screws
(clamping fixture fastening screws, clamping set fastening
screws etc.) must be checked and, if necessary, tightened at
regular intervals.
10. Service work
Reliability of the clamping device can only be ensured if ser
vice regulations in the operating instructions are followed
exactly. The following should be noted in particular:
-- The lubricant recommended in the operating instructions
should be used for lubricating. (Unsuitable lubricant can
reduce the clamping force by more than 50%).
-- All surfaces requiring lubrication should be reachable where
manual lubrication is involved. (Tight component fits mean
that high application pressure is required. A high--pressure
grease gun should therefore be used if necessary).
-- To ensure suitable grease distribution, move the clamping
piston several times over its full range up to the end positions,
grease again and then check the clamping force.
Clamping force should be checked with a clamping force
measuring instrument prior to recommencing serial work and
between service intervals.
"Regular checking is the only guarantee for optimum safety".
It is advantageous to run on several times the end positions
after 500 clamping operations at the latest. (Lubricant which
has been pressed out is reapplied to the pressure surfaces
as a result. The clamping force is maintained for a longer
period of time as a consequence).
Attention
8
133 206 295 415 567 714
195 302 421 592 807 1017 Nm
229 354 492 692 945 1190 Nm
Please check that bajonet catch is locked after tool exchange
Die Spannkraft muss vor Neubeginn einer Serienarbeit
und zwischen den Wartungsintervallen mit einer
Spannkraftmesseinrichtung kontrolliert werden.
"Nur eine regelmäßige Kontrolle gewährleistet eine
optimale Sicherheit". Es ist vorteilhaft, nach spätestens
500 Spannhüben mehrmals bis zu seinen Endstellun-
gen durchzufahren. (Weggedrücktes Schmiermittel
wird dadurch wieder an die Druckflächen herangeführt.
Die Spannkraft bleibt somit für längere Zeit erhalten).
11. Collision
Before the clamping medium can be used again after a
collision, it must be subjected to a specialist and qualified
crack test.
12. Spare parts
Ensure that ONLY original RÖHM spare parts are
used. If this directive is not adhered to, all responsibili-
ties of the manufacturer are negated.
So as to be able to reorder spare parts or individual
parts with absolute certainty and without any problems,
it is necessary to note the 6--digit Id. No. engraved on
the component and / or assembly. In many cases it
Nm
may be sufficient if the item number according to the
assembl drawing or parts list and, possibly, a detailed
description of the component can be provided.
III. Environmental hazards
Different lubricating, cooling and other media are requi-
red when operating a clamping device. These are gene-
rally applied to the clamping device via the distributor
housing. The most frequently encountered of such media
are hydraulic oil, lubricating oil/grease and coolant.
Careful attention must be paid to these substances when
handling the clamping medium to prevent them penetra-
ting the soil or contaminating water. Danger! Environ-
mental hazard! This applies particularly during installa-
tion / removal, as pipes, piston chambers and / or oil
draining plugs may still contain some residual quantities,
and for porous, defective or wrongly fitted seals or
lubricants which can escape or be ejected from the
clamping device during operation
(due to design reasons).
These emerging substances should therefore be collec-
ted and reused (or disposed of in accordance with
applicable regulations)!
IV. Technical safety requirements relating to
force- -actuated clamping devices
1.The machine spindle should only be started after
clamping pressure has built up in the clamping cylinder
and clamping has been achieved within the permitted
working range.
2.Clamping should only be relieved when the machine
spindle is stationary. An exception is permitted if loading/
unloading is intended during the entire procedure and if
the design of the distributor/cylinder permits this.
3. A signal should shut down the machine spindle
immediately if the clamping energy fails.
4.The workpiece should remain securely clamped until
the spindle is stationary in the event of the clamping
energy failing.
5.An alteration of the current position should not be
possible in the event of an electric power failure and
re--activation.