Siemens SINUMERIK 840D sl Operating Manual page 482

Programming technology functions (cycles)
10.4 Milling
● Finishing
● Base finishing
● Edge finishing
● Chamfering
Vortex milling
Particularly where hardened materials are concerned, this process is used for roughing and
contour machining using coated VHM milling cutters.
Vortex milling is the preferred technique for HSC roughing, as it ensures that the tool is never
completely inserted. This means that the set overlap is precisely maintained.
Plunge cutting
Plunge cutting is the preferred method of machining slots for "unstable" machines and
workpiece geometries. This method generally only exerts forces along the tool axis, i.e.
perpendicular to the surface of the pocket/slot to be machined (with the XY plane in Z direction).
Therefore, the tool is subject to virtually no deformation. As a result of the axial loading of the
tool, there is hardly any danger of vibration occurring for unstable workpieces.
The cutting depth can be considerably increased. The plunge cutter, as it is known, ensures
a longer service life due to less vibration for long overhangs.
Input simple
For simple machining operations, you have the option to reduce the wide variety of parameters
to the most important parameters using the "Input" selection field. In this "Input simple" mode,
the hidden parameters are allocated a fixed value that cannot be adjusted.
If the workpiece programming requires it, you can display and change all of the parameters
using "Input complete".
Approach/retraction for vortex milling
1. The tool approaches the starting point in front of the slot in rapid traverse and maintains
the safety clearance.
2. The tool goes to the cutting depth.
3. The open slot is always machined along its entire length using the selected machining
method.
4. The tool retracts to the safety clearance in rapid traverse.
482
Machine manufacturer
Various defined values can be pre-assigned using setting data.
Please refer to the machine manufacturer's specifications.
Operating Manual, 05/2017, A5E40868721
Turning