Open Groove (Cycle899) - Siemens SINUMERIK 828D Operating Manual

Programming technological functions (cycles)
8.2 Milling
Parameter Description
UXY (only for Plane finishing allowance – (only for ∇, ∇∇∇ and ∇ + ∇∇∇)
ShopMill)
Positioning Positioning motion between the grooves:
Straight line:
•
Next position is approached linearly at rapid traverse.
Circular:
•
Next position is approached at the programmed feedrate FP along a circular path.
8.2.9

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 pockets and 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.
260
Operating Manual, 06/2009, 6FC5398-7CP20-0BA0
Unit
mm
HMI sl Milling