Siemens SINUMERIK 840D sl Turning Operating Manual page 543

direction. This process is repeated until the set slot depth plus the finishing allowance has been
reached.
Vortex milling: Down-cut or up-cut
Supplementary conditions for vortex milling
● Roughing
1/2 slot width W – finishing allowance UXY ≤ milling cutter diameter
● Slot width
minimum 1.15 x milling cutter diameter + finishing allowance
maximum, 2 x milling cutter diameter + 2 x finishing allowance
● Radial infeed
minimum, 0.02 x milling cutter diameter
maximum, 0.25 x milling cutter diameter
● Maximum infeed depth ≤ cutting height of milling cutter
Please note that the cutting height of the milling cutter cannot be checked.
The maximum radial infeed depends on the milling cutter.
For hard materials, use a lower infeed.
Machining type, roughing plunge cutting
Roughing of the slot takes place sequentially along the length of the groove, with the milling
cutter performing vertical insertions at the machining feedrate. The milling cutter is then
retracted and repositioned at the next insertion point.
The milling cutter moves along the length of the slot, at half the infeed rate, and inserts
alternately at the left-hand and right-hand walls.
The first insertion motion takes place at the slot edge, with the milling cutter inserted at half the
infeed, less the safety clearance (if the safety clearance is greater than the infeed, this will be
on the outside). For this cycle, the maximum width of the slot must be less than double the width
of the milling cutter + the finishing allowance.
Turning
Operating Manual, 06/2019, A5E44903486B AB
Programming technology functions (cycles)
Vortex milling: Down-cut-up-cut
10.4 Milling
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