Contour Milling - Siemens SINUMERIK 840D sl Operation/Programming Manual

08/2005
5
5.6

Contour milling

Freely-definable
contours
Contours for pockets or
islands
♥ Siemens AG, 2005. All rights reserved
SINUMERIK 840D sl Operation/Programming ShopTurn (BAT) – 08/2005 Edition
The "Contour milling" function is used when you want to mill simple
and complex contours. You can define open contours or closed
contours (pockets, islands, spigots) and machine them with path
milling or milling cycles.
A contour comprises separate contour elements, whereby at least two
and up to 250 elements result in a defined contour. You can also
program chamfers, radii or tangential transitions between the contour
elements.
The integrated contour calculator calculates the intersection points of
the individual contour elements taking into account the geometrical
relationships, which allows you to enter incompletely dimensioned
elements.
With contour milling, you must always program the geometry of the
contour before you program the technology.
You have the option of machining contours of any type by path milling,
stock removal from pockets with or without islands, or clearing spigots.
The machining of freely-definable open or closed contours is generally
programmed as follows:
1. Enter contour
You build up the contour gradually from a series of different
contour elements.
2. Path milling (roughing)
The contour is machined taking into account various approach and
retract strategies.
3. Path milling (finishing)
If you programmed a finishing allowance for roughing, the contour
is machined again.
4. Path milling (chamfer)
If you have planned edge breaking, chamfer the workpiece with a
special tool.
Contours for pockets or islands must be closed, i.e. the start point and
end point of the contour are identical. You can also mill pockets that
contain one or more islands. The islands can also be located partially
outside the pocket or overlap each other. ShopTurn interprets the first
contour specified as a pocket contour and all others as islands.
ShopTurn Functions

5.6 Contour milling

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