Circumferential Slot - Siemens SINUMERIK 840D Operation/Programming Manual

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Programming with ShopMill
3.8 Milling

3.8.7 Circumferential slot

Tool size
Annular slot
Approach/retraction
3-280
The "Circumferential slot" function is used when you want to mill one
or more circumferential slots of the same size in a full circle or pitch
circle.
Please note that there is a minimum size for the milling cutter used to
machine the circumferential slot:
• Roughing:
½ slot width W – finishing allowance UXY ≤ milling cutter diameter
• Finishing:
½ slot width W ≤ cutter diameter
• Edge finishing:
Finishing allowance UXY ≤ milling cutter diameter
To create an annular slot, you must enter the following values for the
"Number N" and "Aperture angle α
N = 1
α
= 360°
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1. The tool approaches the center point of the semicircle at the end of
the slot at rapid traverse at the height of the retraction plane and
adjusts to the safety clearance.
2. Then, the tool enters the workpiece at machining infeed (taking
into consideration the maximum infeed in the Z direction and the
finishing allowance). The circumferential slot is machined in the
programmed machining direction (climb or conventional) in a
clockwise or counterclockwise direction.
3. When the first circumferential slot is finished, the tool moves to the
retraction plane at rapid traverse.
4. The next circumferential slot is approached along a straight line or
circular path and then machined.
5. The tool moves back to the safety clearance at rapid traverse.
SINUMERIK 840D/840Di/810D Operation/Programming ShopMill (BAS) – 10.04 Edition
10.04
" parameters:
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 Siemens AG, 2004. All rights reserved
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