Open Groove (Cycle899) - Siemens SINUMERIK 840D sl Operating Manual

Programming technological functions (cycles)
10.2 Milling
10.2.9

Open groove (CYCLE899)

Function
Use the "Open slot" function if you want to machine open slots.
For roughing, you can choose between the following machining strategies, depending on your
workpiece and machine properties.
● Vortex milling
● Plunge cutting
The following machining types are available to completely machine the slot:
● Roughing
● Rough-finishing
● 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.
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Machine manufacturer
Various defined values can be pre-assigned using setting data.
Please refer to the machine manufacturer's specifications.
Operating Manual, 05/2017, A5E40868956
Milling