Turning; Cutting Cycles - Siemens SINUMERIK 840D sl Operation/Programming Manual

ShopTurn Functions
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5.3 Turning

5.3

Turning

5.3.1 Cutting cycles

Roughing
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If your turning machine has a Y axis and if you want to work with a
position Y . 0, proceed as follows:
1. Select the "Turning" machining level from the "Straight/Circle"
function group (see Section "Selecting the tool and the machining
plane").
2. Program a straight line to the required Y position using the
"Straight/Circle" function group (see Section "Straight").
3. Program the turning function.
The Y position is retained until you deactivate the "Turning" machining
plane.
The stock removal cycles are used to remove stock from corners at
external and internal contours in the longitudinal or transverse
direction.
You can select the machining mode (roughing, finishing).
In roughing applications, paraxial cuts are machined to the
programmed finishing allowance. If no final machining allowance is
programmed, the workpiece is roughed down to the final contour.
During roughing, ShopTurn reduces the programmed infeed depth D if
necessary to make cuts of an equal size. For example, if the overall
infeed depth is 10 and you have specified an infeed depth of 3, this
would result in cuts of 3, 3, 3 and 1. ShopTurn would reduce the
infeed depth to 2.5 to create 4 cuts of equal size.
Whether the tool rounds the contour at the end of each cut by the
infeed depth D, to remove residual corners, or is raised immediately,
depends on the angle between the contour and the tool cutting edge.
The angle above which rounding is performed is stored in a machine
data code.
Please also refer to the machine manufacturer's instructions.
If the tool does not round the corner at the end of the cut, it is raised
by the safety distance or a value specified in machine data at rapid
traverse. ShopTurn always observes the lower value, since otherwise
stock removal at inside contours, for example, could cause the
contour to be damaged.
Please also refer to the machine manufacturer's instructions.
SINUMERIK 840D sl Operation/Programming ShopTurn (BAT) – 08/2005 Edition
08/2005
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♥ Siemens AG, 2005. All rights reserved.