HEIDENHAIN TNC 370 - CONTOUR MILLING (Cycle 16)

8 Cycles
i.
8.5 SL Cycles
CONTOUR MILLING (Cycle 16)
4 Program a positictning blrxk -IOF the starting point in the tool axis (setup cfearance above the wrJrkpiece
surQBxd.
l The algebraic sign for cycle parameter DEPTH defines the working direction.
* This cycle requires a can&r-cut and mill fish 1641).
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L
Cycle 16 CONTOUR MILLING is used to finish-mill the contour pocket.
This cycle can also be used generally for milling contours.
Process
l The TNC positions the tool above the first infeed point.
l The tool then penetrates at the programmed feed rate to the first
pecking depth.
l On reaching the first pecking depth, the tool mills the first contour at
the programmed feed rate and in the specified direction of rotation.
l At the infeed point, the tool is advanced to the next pecking depth.
l This process is repeated until the programmed milling depth is
reached. The remaining subcontours are milled in the same manner.
Input data
l SET-UP CLEARANCE @ (incremental value):
Distance between tool tip (starting position) and workpiece surface.
l MILLING DEPTH 0,: (incremental value):
Distance between workpiece surface and bottom of hole.
l PECKING DEPTH 0: (incremental value):
lnfeed per cut. The TNC moves in one operation to the DEPTH if:
- PECKING DEPTH and DEPTH are identical
- the PECKING DEPTH is greater than the DEPTH.
Enter a positive value.
l FEED RATE FOR PECKING:
Traversing speed of the tool during penetration.
l ROTATION CLOCKWISE: DR- ?
The following is valid for M3:
DR+: Climb milling for pocket and
island
DR-: Up-cut milling for pocket and
island
l FEED RATE F:
Traversing speed of the tool in the working plane.
)X
Fig. 8.56: Finishing allowance
Fig. 8.57: lnfeeds and distances for
CONTOUR MILLING
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TNC 370
8-51