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

ShopTurn Functions
5

5.4 Contour turning

5.4

Contour turning

5-210
The "Contour turning" function is used when you want to create and
cut complex contours. 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, undercuts 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.
When you machine the contour, you can make allowance for a blank
contour which must be entered before the finished part contour. You
then choose one of the following machining technologies:

Stock removal

Grooving

Plunge-turning
You can rough, remove residual material and finish for each of the
three technologies above.
For example, the programming procedure for stock removal is as
follows:
1. Enter unmachined-part contour
If you want to base cutting of the contour on a contour of an
unmachined part (instead of a cylinder or allowance), you have to
define the contour of the unmachined part before you define the
finished-part contour. You build up the unmachined-part contour
gradually from a series of different contour elements.
2. Enter finished-part contour
You build up the finished-part contour gradually from a series of
different contour elements.
3. Stock removal towards the contour (roughing)
The contour is machined in the longitudinal or transverse directions
or parallel to the contour.
4. Remove residual material (roughing)
During stock removal, ShopTurn automatically detects residual
material that has been left. A suitable tool will allow you to remove
this without having to machine the contour again.
5. Stock removal towards the contour (finishing)
If you programmed a finishing allowance for roughing, the contour
is machined again.
SINUMERIK 840D sl Operation/Programming ShopTurn (BAT) – 08/2005 Edition
08/2005
5
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