Circular Pocket Milling (Cycle 5) - HEIDENHAIN TNC 370 User Manual

8 Cycles
4
8.3
Cycles for Milling Pockets, Studs and Slots
CIRCULAR POCKET MILLING (Cycle 5)
!&
4
Mote:
* Program a positioning block for the starting point (hate center) in the worl&g ptnne with radius compensation RO.
* Program a positioning block far the stming pOint in the Wtool axis fsetup clfearance above
vvofkpkm? surface].
* The algsbraic sign for c-y&4 parsmeter DEFTH definas the warking directian.
* This cycle requires a centm-cut end mill {CXl 16411, or a sepmtfs pitot drilling opera&m af: the pock& centm,
Process
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The tool penetrates the workpiece at the starting position (pocket
center) and advances to the first infeed depth.
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The tool subsequently follows a spiral path at the specified feed rate
(see Fig. 8.18). The stepover factor is determined by the value of k (see
Cycle 4 PECKING).
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This process is repeated until the programmed depth is reached.
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At the end of the cycle the tool returns to the starting position.
Input data
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SET-UP CLEARANCE @ (incremental value):
Distance between tool tip (starting position) and workpiece surface
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MILLING DEPTH @I: (incremental value):
Distance between workpiece surface and bottom of hole.
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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.
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FEED RATE FOR PECKING:
Traversing speed of the tool during penetration.
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CIRCLE RADIUS @:
Radius of the circular pocket.
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FEED RATE F:
Traversing speed of the tool in the working plane.
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ROTATION CLOCKWISE: DR- ?
DR + : Climb milling with M3
DR - :
Up-cut milling with M3
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Fig. 8.18: Cutter path for roughing-out
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Fig. 8.19: Distances and infeeds with
CIRCULAR POCKET MILLING
Fig. 8.20: Direction of the cutter path