Circular Pocket (Pocket4) - Siemens SINUMERIK 828D Operating Manual

Programming technological functions (cycles)
8.2 Milling
8.2.3

Circular pocket (POCKET4)

Function
You can mill any circular pocket with the "Circular pocket" cycle.
The following machining methods are available:
● Mill circular pocket from solid material.
● Pre-drill circular pocket in the center first if, for example, the milling cutter does not cut in
● Machine pre-machined circular pocket (see "Solid machining" parameter).
The following machining types are available for milling using the "Circular pocket" function:
● Plane-by-plane
● Helical
Approach/retraction for plane-by-plane solid machining
In plane-by-plane machining of the circular pocket, the material is removed horizontally, one
layer at a time.
1. The tool approaches the center point of the pocket at rapid traverse at the height of the
2. The tool is inserted into the material according to the chosen strategy.
3. The circular pocket is always machined from inside out using the selected machining
4. The tool moves back to the safety clearance at rapid traverse.
Approach/retraction for helical solid machining
In helical reaming, the material is removed down to pocket depth in a helical movement.
1. The tool approaches the center point of the pocket at rapid traverse at the height of the
2. Infeed to the first machining diameter.
3. The circular pocket is machined with the chosen machining type up to pocket depth or up
4. The tool moves back to the safety clearance at rapid traverse.
5. Lateral infeed to the next machining diameter.
244
the center (program the drilling, circular pocket and position program blocks in
succession).
– Complete machining
– Remachining
retraction plane and adjusts to the safety clearance.
method.
retraction plane and adjusts to the safety clearance.
to pocket depth with finishing allowance.
Operating Manual, 06/2009, 6FC5398-7CP20-0BA0
HMI sl Milling