HEIDENHAIN TNC 640 (34059x-04) Cycle programming - Manual (Page 392)

Cycles: Turning
13.29 THREAD EXTENDED (Cycle 832, DIN/ISO: G832)
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TNC 640 | User's Manual Cycle Programming | 3/2014
13.29 THREAD EXTENDED (Cycle 832, DIN/
ISO: G832)
Application
This cycle enables you to run both face turning and longitudinal
turning of threads or tapered threads. Expanded scope of function:
Selection of longitudinal thread or face thread.
The parameters for dimension type of taper, taper angle and
contour starting point X enable the definition of various tapered
threads.
The parameters for approach path and overrun path define a
path in which feed axes can be accelerated or decelerated.
You can process single threads or multi-threads with the cycle.
If you do not enter a thread depth in the cycle, the cycle uses a
standardized thread depth.
The cycle can be used for inside and outside machining.
Cycle run
The TNC uses the tool position as cycle starting point when a cycle
is called.
1 The TNC positions the tool in rapid traverse at set-up clearance
in front of the thread and runs an infeed motion.
2 The TNC runs a longitudinal cut. Here the TNC synchronizes
feed rate and speed so that the defined pitch is machined.
3 The TNC retracts the tool at rapid traverse by the set-up
clearance.
4 The TNC positions the tool back at rapid traverse to the
beginning of cut.
5 The TNC runs an infeed motion. The infeeds are run according
to the angle of infeed
Q467.
6 The TNC repeats the process (2 to 5) until the thread depth is
completed.
7 The TNC runs the number of air cuts as defined in
Q476.
8 The TNC repeats the process (2 to 7) according to the number
of traverses
Q475.
9 The TNC positions the tool back at rapid traverse to the cycle
starting point.