Contour Milling; General Information; Representation Of The Contour - Siemens SINUMERIK 840D sl Operating Manual

4.8

Contour milling

4.8.1

General information

Function
You can mill a simple or complex contour with the "Contour milling" cycle. You can define
open contours or closed contours and machine them with path milling or milling cycles.
A contour comprises separate contour elements, whereby at least two and up to 170
elements result in a defined contour. You can also program chamfers, radii 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.
With contour milling, you must always program the geometry of the contour before you
program the technology.
Programming of arbitrary contours
The machining of arbitrary open or closed contours is generally programmed as follows:
1. Enter contour
2. Path milling (roughing)
3. Path milling (finishing)
4. Path milling (chamfering)
4.8.2

Representation of the contour

The cycle represents a contour as a program block in the program. If you open this block,
the individual contour elements are listed symbolically and displayed in broken-line graphics.
HMI sl Turning
Operating Manual, 01/2008, 6FC5398-7AP10-0BA0
You build up the contour gradually from a series of different contour elements.
The contour is machined taking into account various approach and retract strategies.
If you programmed a finishing allowance for roughing, the contour is machined again.
If you have planned edge breaking, chamfer the workpiece with a special tool.
Programming a cycle
4.8 Contour milling
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