HEIDENHAIN TNC 640 (34059x-01) Cycle programming - Manual (Page 355)

HEIDENHAIN TNC 640 355
13.23 THREAD EXTENDED (Cy
c
le
832)
13.23 THREAD EXTENDED
(Cycle 832)
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 at rapid traverse back to the cycle
starting point.