Thread Milling - Siemens SINUMERIK 840D Operation/Programming Manual
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Also See for SINUMERIK 840D:
- Function manual (920 pages) ,
- Diagnostics manual (714 pages) ,
- Operating turning (713 pages)
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3
Programming with ShopMill
3.7 Drilling
SR
Spindle speed for retraction (not for tapping with a floating tapholder)
VR
Cutting rate for retraction (alternative to SR) (not for tapping with a floating tapholder) m/min
1 cut
The thread is drilled in one cut without stopping.
Stock removal
The drill is retracted from the workpiece for stock removal (not for tapping with a
floating tapholder)
Chipbreaking
The drill is retracted by the retraction amount V2 for chipbreaking (not for tapping
with a floating tapholder)
Z1
Tapping depth with reference to Z0 (abs. or inc.)
Z0 is specified in the position pattern ("Positioning" softkey).
D
Maximum infeed (for stock removal or chipbreaking only)
V2
Retraction amount (for chipbreaking only)
Amount by which the drill is retracted for chipbreaking.
V2=automatic: The tool is retracted by one revolution.
3.7.6 Thread milling
Cut thread
Internal thread
3-238
You can use a form cutter to machine any type of right-hand or left-
hand thread.
Threads can be machined as right-hand or left-hand threads and from
top to bottom or vice versa.
For metric threads (thread pitch P in mm/rev) ShopMill assigns a
value calculated from the thread pitch to the Thread depth K
parameter. You can change this value. The default selection must be
activated via a machine data code.
Please refer to the machine manufacturer's instructions.
Press the "Drilling", "Thread" and "Cut thread" softkeys.
Thread
>
Sequence:
• Position on thread center point on retraction plane in rapid traverse
• Infeed at rapid traverse to reference plane shifted forward by
amount corresponding to safety clearance
• Approach along an approach circle calculated in the control at
programmed feedrate
• Approach motion to thread diameter on circular path
• Cut thread along a spiral path in clockwise or counterclockwise
direction (depending on whether it is left-hand or right-hand thread)
SINUMERIK 840D/840Di/810D Operation/Programming ShopMill (BAS) – 10.04 Edition
3
10.04
rev/min
mm
mm
mm
Siemens AG, 2004. All rights reserved
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