Blank Updating - Siemens SINUMERIK 840D Programming Manual

Turning Cycles
4
4.10 Extended stock removal cycle - CYCLE950 (SW 5.3 and later)
When a machining program is executed in the
simulation, no programs with traversing blocks or an
updated blank contour are created in the file system.

Blank updating

The extended stock removal cycle CYCLE950
detects residual material during roughing and is able
to generate an updated blank contour outside the
machining process, which can be used in a further
machining step.
To do this, the cycle internally considers the angle at the
tool point.
The relief cut angle of the tool must be entered in the
tool offset data (parameter 24).
The cycle defines the main cutting edge angle
automatically according to the tool point position.
For tool point positions 1 to 4, the blank update is
calculated with a main cutting edge angle of 90°. For
tool point positions 5 to 9, the main cutting angle is
assumed to be identical to the relief cut angle.
If CYCLE950 is called more than once, each time with
blank update, in the same program, different names for
the generated blank contours must be assigned; it is not
permissible to use the program name (parameter
_NP8) more than once.
Extended stock removal cannot be performed in m:n
configurations.
4-272
X
Finished-part contour
Blank contour
Finishing allowance
α = Relief cut angle of turning tool
Tool point direction 3
Main
cutting
90°
edge angle
Tool point direction 8
Main
cutting
edge angle
SINUMERIK 840D/840Di/810D/FM-NC Programming Guide, Cycles (PGZ) - 04.00 Edition
03.96
04.00
Machining direction
α
α
Residual contour
for relief cutting
Tool clearance angle
α
Tool clearance angle
α α
 Siemens AG 2000 All rights reserved.
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Z