Circular Slot With Reciprocating Plunge-Cut (Cycle 210) - HEIDENHAIN TNC 370 User Manual

8 Cycles
-
8.3 Cycles for Milling Pockets, Studs and Slots
CIRCULAR SLOT WITH RECIPROCATING PLUNGE-CUT (Cycle 210)
Nott3:
*
The
elgebralc sign for cycle paramfrter i2EPTf-l defines the working direction,
* The mitling cutter diameter must not be greater than the slot width and nut less than a
third of
the slot width.
*
The milling
cutter diameter should be kss ttlan half the slot fangth. The
TMC otherwise cannot execute this
C&C?.
d
4'
* The TNC cannat show the CIRCULAR SLOT cycle in test run graphics, Use the programming graphics for
checking the part program.
Process
Roughing process:
l
The TNC positions the tool in the Z axis to the
second setup clearance and subsequently in the
starting point. The starting point is calculated
from the entered cycle parameters. From there,
the TNC positions the tool to the programmed
setup clearance above the workpiece surface.
l
The tool moves at the roughing feed rate to the
workpiece surface. From there, the milling cutter
moves - plunge-cutting obliquely into the
material -to the other end of the slot.
l
The tool subsequently moves back to the
starting point, once again with oblique plunge-
cutting. These steps are repeated until the
programmed milling depth is reached.
l
At the programmed milling depth the TNC
moves the tool for the purpose of face milling to
the other end of the slot.
Finishing process:
l
For finising the slot, the TNC moves the tool
tangentially to the contour of the finished part.
After this, the contour is machined using climb
milling (with M3).
l
At the end of the contour, the tool moves
tangentially away from the contour.
l
Finally, the tool moves in rapid traverse back to
the setup clearance and - if this has been
specified - to the second setup clearance.
Fig. 8.33: Cycle sequence: CIRCULAR SLOT WITH RECIPROCATING
PLUNGE-CUT
8-30
TNC 370