Special Functions For Structural Parts - Siemens SINUMERIK 840D Manual

4.1
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Aerospace, structural parts
4.1

Special functions for structural parts

Structural parts are frequently used within the aircraft industry and take the form of load-bearing
aircraft parts, e.g. the parts used to assemble the fuselage or wings. One of the key features of
structural parts is the way in which they use only a small amount of material due to their geome-
try, but offer increased load-bearing capacity. For safety reasons, structural parts are milled from
solid material and stock removal rates of up to 97% are by no means unusual. As a result, spe-
cial functions are required throughout the entire machining process.
Key functions for machining structural parts:
VNCK,
because the high level of material usage calls for a form of simulation that resembles the con-
trol exactly.
VCS,
as maximum accuracy is required in conjunction with extremely large workpieces.
CYCLE832
Easy preselection of the key machine settings for roughing and finishing.
ORIVECT,
as this is the only kind of orientation interpolation that will ensure the necessary precision
when creating inclined walls.
3D tool radius compensation,
because this even allows the use of reground tools without having to rebuild the NC program.
Integrated process chain from generation in CAD through to execution on the CNC.
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