4
The personnel charged with duties related to the machine
vice must have read the operating instructions and in parti-
cular the chapter entitled
”
Safety Requirements
”
.
When machining parts, safety largely depends on proper
use and workmanlike handling of the clamping tool.
Unworkmanlike handling and machining may impair the
function of the machine vice. Inadequately clamped work-
pieces may be flung out of the machine and cause injuries
to personnel.
1. Proper mounting, operation and maintenance are essen-
tial requirements.
2. A machine vice which is not handled correctly constitutes
a potential source of danger.
3. The operator must satisfy himself of the perfect condition
of the machine vice before putting it into operation.
4. Any operation which is not perfectly safe must be
avoided.
5. Any changes affecting the safety of work with the ma-
chine vice must be immediately reported by the operator.
6. Changes or conversions affecting the safety of the ma-
chine vice are not permitted.
7. Only the manufacturer
’
s original space parts may be
used for repairs or reconditioning work. All repairs
must be carried out by skilled personnel.
8. The codes of practice and rules for the prevention
of accidents in force in the country of use must be
observed.
9. The applicable European or national regulations for
machinery must be complied with.
10. The general, legal and other mandatory regulations for
the prevention of accidents must be observed in addition
to the operating instructions.
11. The information and recommendations contained in
the operating instructions must be strictly observed.
12. Unless specified otherwise, the work must be always be
clamped by turning the handcrank clockwise. If the hand-
crank is turned anti-clockwise, the work is no longer held
securely and constitutes a hazard for personnel and the
machine vice.
13. The vice must always be mounted on a stable base
which is not easily deformed.
14. The clamps and mounting bolts must be fitted as descri-
bed in the operating instructions.
15. If the vice has not been used for a prolonged period of
time, it must be checked for proper functioning before it
is put into operation. As a rule, this should include a
check of the clamping force and capacity range.
16. The clamping force must be checked with the aid of a
suitable instrument, such as a hydraulic load cell or
an electronic measuring device. The clamping force
measured should not be less than 80% of the specified
maximum clamping force.
17. For machine vice with jaws that can be shifted, sufficient
residual clamping travel must be available in the final
position.
18. If the primary energy of hydraulic machine vices
requiring a pressure intensifier or hydraulic unit should
fail, the clam-ping force must be maintained at least
until the machine can be stopped or until the tool can
be removed from the working area.
19. Hydraulically operated machine vices may not be
clamped mechanically.
20. The hydraulic supply lines for the workholding fixture
must be rated for the maximum operating pressure and
protected against mechanical destruction.
21. If the hydraulic machine vice is disconnected from the
hydraulic supply line, such as when working with pallets,
for example, the hydraulic system must be checked for
leakage in the disconnected condition before the vice is
put into operation. The pressure must be maintained at
least for the duration of the machining operation.
22. When clamping the parts to be machined, special care
must be taken to assure full contact of the clamping
surfaces. If this is prevented by excessive errors of
angularity or parallelism, for example, suitable jaws
from the range of accessories offered, such as floating
jaws or special clamping jaws, will have to be used for
compensation.
23. Flexible workpieces and insufficient clamping forces may
cause injuries if insecurely held parts are flung out of the
machine.
The machine vice may only be used for clamping rigid
workpieces.
24. The following precautions must be observed when
machine vices are used which are equipped for
independent force multiplication as a function of travel:
Workpiece stacks or deformed, i.e. not perfectly level
parts, or parts with heavy burr must be mechanically
preclamped (without force multiplication) until they are no
longer resilient before the highpressure force is applied.
25. Extra high or extra long workpieces must be secured with
the aid of suitable auxiliaries, such as stops or pads.
Special clamping jaws or clamping at several points may
be necessary to avoid vibrations.
1. Safety Requirements and Rules and Regulations
for the Use of Machine Vices
The following requirements must be met before the machine vice is put into operation:
