Longitudinal Slot - Siemens SINUMERIK 840D sl Operation/Programming Manual

ShopTurn Functions
5
5.5 Milling

5.5.5 Longitudinal slot

Approach/retraction
Machining type
5-250
The "Longitudinal slot" function is used when you want to mill a
longitudinal slot on the end face or peripheral surface.
The following machining methods are available:

Mill longitudinal slot from solid material.

Pre-drill longitudinal slot in the center first if, for example, the
milling cutter does not cut across center (program the drilling,
rectangular pocket and position program blocks one after another).
1. The tool approaches the center point of the slot at rapid traverse at
the height of the return plane and adjusts to the safety clearance.
2. The tool is inserted into the material according to the chosen
strategy.
3. The longitudinal slot is always machined with the chosen
machining type from inside out.
4. The tool moves back to the safety clearance at rapid traverse.
You can select the machining mode for milling the longitudinal slot as
follows:

Roughing
In "Roughing" mode, the individual planes of the slot are machined
one after another from inside out until depth Z1 or X1 is reached.

Finishing
In "Finishing" mode, the edge is always machined first. The slot
edge is approached on the quadrant, which joins the corner radius.
In the last infeed, the base is finished from the center out.

Edge finishing
Edge finishing is performed in the same way as finishing, except
that the last infeed (finish base) is omitted.

Chamfer
Chamfering involves edge breaking at the upper edge of the
longitudinal slot.
SINUMERIK 840D sl Operation/Programming ShopTurn (BAT) – 08/2005 Edition
08/2005
5
♥ Siemens AG, 2005. All rights reserved