5
08/2005 ShopTurn Functions
5.2 Drillin
5
♥ Siemens AG, 2005. All rights reserved
SINUMERIK 840D sl Operation/Programming ShopTurn (BAT) – 08/2005 Edition 5-173
5.2.4 Deep hole drilling
The "Deep hole drilling" function is used when you want to drill deep
holes with several infeed steps on the end face or peripheral surface.
You can choose between chip breakage during drilling or retraction
from the workpiece for stock removal.
The tool is moved at rapid traverse to the programmed position,
allowing for the retraction plane and safety clearance.
Chipbreaking
1. The tool drills at the programmed feedrate F as far as the first
infeed depth.
2. The tool is retracted by V2 for chipbreaking and drills up to the next
infeed depth.
3. Step 2 is repeated until final drilling depth Z1 has been reached
and dwell time DT has expired.
4. The tool moves back to the safety clearance at rapid traverse.
Stock removal
1. The tool drills at the programmed feedrate F as far as the first
infeed depth.
2. The tool is retracted from the workpiece at rapid traverse to the
safety clearance for stock removal and is then re-inserted as far as
the 1st infeed depth, reduced by a clearance distance V3.
3. Drilling is then resumed up to the next infeed depth and the tool is
then retracted again.
4. Step 3 is repeated until the programmed drilling depth Z1 has been
reached and dwell time DT has expired.
5. The tool moves back to the safety clearance at rapid traverse.
Deep hole
drilling >
¾ Press the "Drilling" and "Deep hole drilling" soft keys.
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