Siemens sinumerik 840D sl Operating Manual page 362

Programming technology functions (cycles)
8.4 Milling
Approach/retraction for plunge cutting
1. The tool moves in rapid traverse to the starting point in front of the slot at the safety
2. The open slot is always machined along its entire length using the selected machining
3. The tool retracts to the safety clearance in rapid traverse.
Machining type, roughing vortex milling
Roughing is performed by moving the milling cutter along a circular path.
While performing this motion, the milling cutter is continuously fed into the plane. Once the
milling cutter has traveled along the entire slot, it returns to its starting point, while continuing
to move in a circular fashion. By doing this, it removes the next layer (infeed depth) in the Z
direction. This process is repeated until the set slot depth plus the finishing allowance has
been reached.
Vortex milling: Climbing or conventional
milling
Supplementary conditions for vortex milling
● Roughing
● Slot width
● Radial infeed
● Maximum infeed depth ≤ cutting height of milling cutter
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clearance.
method.
1/2 slot width W – finishing allowance UXY ≤ milling cutter diameter
minimum 1.15 x milling cutter diameter + finishing allowance
maximum, 2 x milling cutter diameter + 2 x finishing allowance
minimum, 0.02 x milling cutter diameter
maximum, 0.25 x milling cutter diameter
Vortex milling: Climbing - conventional
milling
Operating Manual, 07/2010, 6FC5398-8CP40-0BA0
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