Additional Cycles And Functions In Shopturn; Drilling Centric - Siemens SINUMERIK 840D sl Operating Manual

8.7

Additional cycles and functions in ShopTurn

8.7.1

Drilling centric

Function
Using the "Drill centric" cycle, you can perform drilling operations at the center of a face
surface.
You can choose between chip breaking during drilling or retraction from the workpiece for
stock removal. During machining, either the main spindle or counterspindle rotates.You can
use a drill, rotary drill or milling cutter as the tool.
The tool is moved with rapid traverse to the programmed position, allowing for the return
plane and safety clearance.
Approach/retraction during chipbreaking
1. The tool drills at the programmed feedrate F as far as the first infeed depth.
2. For chipbreaking, the tool retracts by the retraction value V2 and drills as far as the next
3. Step 2 is repeated until final drilling depth Z1 has been reached and dwell time DT has
4. The tool retracts to the safety clearance with rapid traverse.
Approach/retraction during 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 with rapid traverse to the safety clearance for
3. The tool then drills down to the next infeed depth that can be reduced by the factor DF
4. Step 3 is repeated until final drilling depth Z1 has been reached and dwell time DT has
5. The tool retracts to the safety clearance with rapid traverse.
For example, if you want to drill very deep holes, you can also employ a rotating tool spindle.
First specify the required tool and tool spindle speed under "Straight/Circle" → "Tool". Then
program the "Drill centered" function.
Turning
Operating Manual, 03/2013, 6FC5398-8CP40-3BA1
infeed depth that can be reduced by the factor DF.
expired.
swarth removal and is then re-inserted at the 1st infeed depth in the automatic mode
reduced by an anticipation distance calculated by the control system.
and the tool retracts again to Z0 + safety clearance for stock removal.
expired.
Programming technology functions (cycles)
8.7 Additional cycles and functions in ShopTurn
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