Programming Example For The Pocket On A Structural Part - Siemens SINUMERIK 828D Manual

Aerospace, structural parts
4.2
Inclined inner and outer walls are a typical feature of structural parts. The most effective way to
create these is to use the circumferential milling technique. The following programming example
relates to the milling of a pocket with inclined walls. It illustrates the functions required to achieve
this, such as orientation interpolation and tool radius compensation, by showing what actually
happens in practice.
ISD based on pocket
floor,
workpiece surface
© Siemens AG All rights reserved SINUMERIK, Manual, Mold-Making with 3- to 5-Axis Simultaneous Milling
Programming example for the pocket on a
structural part
60
5
The pocket contour can be programmed on
the basis of the pocket floor, in which case the
ISD is 0.
Alternatively, the contour can be programmed
in relation to the workpiece surface and in this
case the insertion depth ISD is 25.9807
(length of pocket wall). The radii will need to
be adjusted.
The adjustment can be calculated using
Pythagoras' theorem.
2 2
( ) 5 ( )
ISD = 25 + =
4.2
( , )
25 9807
135