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

8 Cycles
4
8.3 Cycles for Milling Pockets, Studs and Slots
4
SLOT WITH RECIPROCATING PLUNGE-CUT (Cycle 210)
Note:
4
l
The algebraic sign far cycle paramerter DEPTH d&ines the working direction,
l
The milting cut&x diameter must not be
gfeatef than d+m sfot
width and mt less than a third of the slot width,
* The niling cukm diameter shoufd be less thm hatf the stat tength. Ths TNC &wwise cannut zwcu~e this
i
cycle.
Process
Roughing process:
Fl
l
The TNC positions the tool in the Z axis to the
second setup clearance and subsequently in the
center of the left circle. 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 in the longitudinal direction of the slot-
plunge-cutting obliquely into the material-to
the center of the right circle.
l
The tool subsequently moves back to the center
of the left circle, 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
Fig. 8.30:
moves the tool for the purpose of face milling to
Cycle sequence: SLOT WITH RECIPROCATING PLUNGE-
CUT
the other end of the slot and then once again to
the center of the slot.
Finishing process:
l
From the center of 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, to the center
of the slot.
l
Finally, the tool moves in rapid traverse back to
the setup clearance and-if this has been
specified-to the second setup clearance.
8-28 TNC 370