HEIDENHAIN 548431-05 User Manual page 360

5
Deep-hole drilling
A hole is to be bored through the workpiece outside the turning
center with the Deep drilling axial cycle. This machining operation
requires a traversable spindle and driven tools.
The parameters 1st hole dpth P and Hole depth reduct. val IB
define the individual passes, and the Minimum hole depth JB
limits the hole depth reduction value.
As the Return length B is not defined, the drill therefore retracts to
the Start point after each pass, remains there for the programmed
dwell time, and then advances again to the safety clearance for the
next pass.
Since this example is to illustrate how you drill a through hole, the
End point drill Z2 is programmed such that the tool has to drill all
the way through the workpiece before it reaches the end point.
The parameters AB and V define a feed-rate reduction for both spot
drilling and through-boring.
Tool data
TO = 8 – Tool orientation
I = 12 – Drilling diameter
B = 118 – Point angle
H = 1 – The tool is a driven tool
360
Teach-in | Drilling cycles
HEIDENHAIN | MANUALplus 620 | User's Manual | 12/2017