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Huvema HU 40 G Seite 29

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CHANG E S AND T YPI N G ERRORS RESERVED
CHANG E S AND T YPI N G ERRORS RESERVED
CHANG E S AND T YPI N G ERRORS RESERVED
Drilling Machine Instruction Book
29
is auto-locking, but for it the surfaces of the tool taper and spindle taper must be in
contact. To get the best possible contact, the surfaces of the tool taper as well as the
spindle taper should be in good conditions. Therefore, it is advisable to handle the tool
as well as the main spindle of the machine carefully.
6. CHIPS DURING MACHINING.
The machining process removes material from the piece. This material is released in
chips, which can be of different shapes depending on the material itself. The most
common ones are of three types: fragmented chips in small bits, short helicoidal chips
and long helicoidal chips.
The chips fragmented in small bits can be rejected from the machining area and can be
dangerous if they reach the eyes of the operator. To avoid this, it is advisable to wear
safety glasses.
The long helicoidal chips tend to roll up the tool and gain considerable volume before
breaking, which is dangerous if they reach the operator as they may produce injuries.
The reached volume may also displace the drill protector from its security position,
increasing the risk of an accident. It is advisable to use chip breaking tools to machine
materials which produce such chips. For further information contact the tool
manufacturer.
Drilling Machine Instruction Book
28
reaches the tapping depth previously fixed.
3. CORRECT USE OF THE MACHINE.
The correct use of the machine involves:
Not exceeding its working capacity.
Operating the machine by qualified and trained staff and according to the points
mentioned in the instruction book.
Working under the safety systems provided with the machine, checking them and
keeping them.
Watching the safety measures mentioned in the instruction book and notices on the
machine.
Wearing clothes which provide personal protection as mentioned in the instruction
book.
Watching the safety measures which may affect work in the machine and that can be
lawfully expected, as well as those demanded in the workshops.
4. PIECE CLAMPING.
Tangential cutting forces and axial forces in the feed direction of the tool are mainly
produced during the drilling process. The tangential forces produce a moment of forces
which make the piece being drilled turn. Therefore, the pieces to be drilled (or to be
machined by one of the operations mentioned above) must be clamped in an
appropriate device such as a drillchuck and the drillchuck must be correctly clamped to
the machine table. For this reason the machine tables are provided with “T” slots.
The pieces must be clamped conveniently by some clamping device.
The clamping devices in turn must be clamped to the machine table.
The machine table is provided with “T” slots for such purpose.
5. TOOL FIXING.
The tools generally used in this machine will have parallel or tapershanks.
Drillholders are normally used to fix to the main spindle of the machine the parallel shank
tools. This fixing device has usually got three jaws, which hold the tool by the parallel
part of the shank. These are used for small drill diameters (max. up to dia. 16mm).
Bigger diameter drills, usually have taper shank of morse taper type (the ones of smaller
diameters to 16mm can also have taper shanks).
The housing in the main spindle to insert the tool is of morse taper type. It is very
important to insert the tool taper correctly in the main spindle taper to avoid the tool
falling from its housing when turning and provoke an accident.
The coupling system itself of the tool male taper in the female taper of the main spindle
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Andere Handbücher von Huvema HU 40 G

Huvema HU 40 G Bedienungsanleitung - Deutsch - 28 seiten

Huvema HU 40 G Bedienungsanleitung - Holländisch - 32 seiten


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