ARNO - каталог сверление 2013 EN
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Application referenceSHARK-DRILL®
Application referenceSHARK-DRILL®
ReCommendations for ...
ReCommendations for ...
1
... SHARK-Drill® (extra) short to standard holder
In order to obtain a problem free machining with the drills,
the following has proven successful:
1) Check and possibly adjust coolant pressure (see page 103).
2) Immediatly after the first cut we suggest a chip breaking and cutting data review.
The target should be short and easily removable swarf.
3) Measure the hole and check that tolerance is acceptable.
4) During the machining always ensure that the swarf is short and removed from the
hole. Otherwise a pecking cycle may be required.
Always select
shortest possible
drill!
Important: Carbide inserts
only suitable up to approx.
6 – 7xD.
Swarf control – The following recommendations have also proved advantageous:
• Monitor swarf control.
• If not yet at maximum feed rate potential, an increase in feed rate can lead to better chip breaking.
• If none of these changes are successful it may be necessary to insert a pecking cycle.
For many materials in the stainless steel area, but also others, it may not always be possible to achieve acceptable
chip breaking simply by adjusting VC and f. In such cases a pecking cycle will be needed. This should only be a small
peck cycle of approx 0.1 mm.
A pecking cycle where the tool is removed out of the hole is not recommended. As a rule take increments of approx
10% of the drill diameter (e.g. 20 mm diameter = 2 mm peck depth).
ReCommendations for ...
... the extended SHARK-Drill®
In order to obtain a problem free machining with the drills,
the following has proven successful:
1) Pilot drilling (approx. 1xD) with same diameter. The drill point should be same or larger than
SHARK-Drill® insert. Other start options:
• Centering with 132 degree drill point (up to 65 mm).
• Centering with 144 degree drill point (from 64 – 114 mm).
• Careful penetration (approx 50% of recommended feed rate) until full diameter is achieved.
2) Chip breaking and cutting data optimizing before
starting. Target is short and easy to evacuate swarf.
Modify cutting data as below:
VC [m/min]
f [mm/U]
8 – 11xD
0.9
x
12 – 14xD
0.58
0.9
Always select
shortest possible
drill!
Attention: Carbide inserts are
not recommended.
3) Check the coolant pressure and flow rate. The coolant pressure (see page 103) can be adjusted
using the following formula: SHARK-Drill® (8 – 11xD) x1.3/(12 – 14xD) x1.5.
4) Measure the hole and check that tolerance is acceptable.
5) Incrase cutting data to previously established data and finish drilling, making sure that the swarf
remains short and leaving the hole problem free. Otherwise a peck cycle may be required.
Swarf control – The following recommendations have also proved advantageous:
• Monitor swarf control.
• If not yet at maximum feed rate potential, an increase in feed rate can lead to better chip breaking.
• If none of these changes are successful it may be necessary to insert a pecking cycle.
For many materials in the stainless steel area, but also others, it may not always be possible to achieve acceptable
chip breaking simply by adjusting VC and f. In such cases a pecking cycle will be needed. This should only be a small
peck cycle of approx 0.1 mm.
A pecking cycle where the tool is removed out of the hole is not recommended. As a rule take increments of approx
10% of the drill diameter (e.g. 20 mm diameter = 2 mm peck depth).
... the extreme long SHARK-Drill®
In order to obtain a problem free machining with the drills,
the following has proven successful:
1) Pilot drilling (approx. 1xD) with same diameter. The drill point should be same or larger than SHARK-Drill® insert.
Other start options:
• Centering with 132 degree drill point (up to 65 mm) – careful penetration (approx. 50% of recommended feed rate)
until full diameter is achieved.
• Centering with 144 degree drill point (from 64 – 114 mm) – careful penetration (approx. 50% of recommended
feed rate) until full diameter is achieved.
2) Swarf control and cutting data optimizing should be performed before full depth drilling, we suggest using the pilot drill.
The target short and easily evacuated swarf.
3) Check the coolant pressure and flow rate. The coolant pressure (see page 103) can be adjusted using the
following formula: SHARK-Drill® (20 – 24xD) x2.0/(25 – 32xD) x3.0.
4) The cutting data should also
be modified depending on drill depth:
VC [m/min]
f [mm/U]
20 – 24xD
0.80
0.80
25 – 32xD
0.75
0.80
5) With the long drill stationary or penetration with 10 – 20 rev./min.
6) Increase cutting data to previously established data and finish drilling, making sure that the swarf remains short
and leaving the hole problem free. Otherwise a peck cycle may be required.
7) When reaching the depth required stop the spindle or reduce to 10 – 20 rev./min and feed out the drill.
8) Note that the extra long and extreme long drills do deflect.
1
Swarf control – The following recommendations have also proved advantageous:
Up to drill depth of 1 – 2xD monitor swarf. If the swarf is too long, cutting data should be modified.
For many materials in the stainless steel area, but also others, it may not always be possible to achieve
acceptable chip breaking simply by djusting VC and f. In such cases a pecking cycle will be needed.
This should only be a small peck cycle of approx 0.1 mm.
A pecking cycle where the tool is removed out of the hole is not recommended. As a rule take incre-
ments of approx 10% of the drill diameter (e.g. 20 mm diameter = 2 mm peck depth).
Tipp:
If not yet at maximum feed rate
potential, an increase in feed
rate can lead to better chip
breaking. If none of these
changes are successful it may
be necessary to insert a peck-
ing cycle.
112 ARNO®-Werkzeuge | Bohren | Drilling | Foratura
Alle Angaben in mm / Dimensions in mm / Tutte le dimensioni in mm
info@arno-tools.ru
www.arno-tools.ru
Alle Angaben in mm / Dimensions in mm / Tutte le dimensioni in mm
ARNO®-Werkzeuge | Bohren | Drilling | Foratura 113