Siemens SINUMERIK 840D SL Operating Manual page 326

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Programming technological functions (cycles)
8.2 Milling
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.
Machining type: Plane-by-plane
When milling circular pockets, you can select the following machining types:
● Roughing
● Finishing
● Finishing of edge
● Chamfering
326
retraction plane and adjusts to the safety clearance.
method.
retraction plane and adjusts to the safety clearance.
to pocket depth with finishing allowance.
During roughing, the individual planes of the circular pocket are machined one after the
other from center point until depth Z1 is reached.
During finishing, the edge is always machined first. The pocket edge is approached on
the quadrant, which joins the pocket radius. In the last infeed, the base is finished from
the center out.
Edge finishing is performed in the same way as finishing, except that the last infeed
(finish base) is omitted.
Chamfering involves edge breaking at the upper edge of the circular pocket.
Operating Manual, 02/2012, 6FC5398-7CP40-3BA0
Milling

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