Siemens SINUMERIK 840D, Руководство по эксплуатации

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Programming technological functions (cycles)
8.5 Contour turning - only for G code programs
Milling
390
Operating Manual, 03/2010, 6FC5398-7CP20-1BA0
8.5.7 Stock removal (CYCLE952)
Function
For stock removal, the cycle takes into account a blank that can comprise a cylinder, an
allowance on the finished-part contour or any unmachined-part contour. You must define an
unmachined-part contour as a separate closed contour in advance of the finished-part
contour.
Rounding the contour
In order to avoid residual corners during roughing, you can enable the "Always round the
contour" function. This will remove the protrusions that are always left at the end with each
cut (due to the cut geometry). The "Round to the previous intersection" setting accelerates
machining of the contour. However, any resulting residual corners will not be recognized or
machined. Thus, it is imperative that you check the behavior before machining using the
simulation.
When set to "automatic", rounding is always performed if the angle between the cutting edge
and the contour exceeds a certain value. The angle is set in a machine data element.
Machine manufacturer
Please refer to the machine manufacturer's specifications.
Alternating cutting depth
Instead of working with constant cutting depth D, you can use an alternating cutting depth to
vary the load on the tool edge, As a consequence you can increase the tool life.
The percentage for the alternating cutting depth is saved in a machine data element.
Machine manufacturer
Please refer to the machine manufacturer's specifications.
Cut segmentation
To avoid the occurrence of very thin cuts in cut segmentation due to contour edges, you can
align the cut segmentation to the contour edges. During machining the contour is then
divided by the edges into individual sections and cut segmentation is performed separately
for each section.
Set machining area limits
If, for example, you want to machine a certain area of the contour with a different tool, you
can set machining area limits so that machining only takes place in the area of the contour
you have selected. You can define between 1 and 4 limit lines.