Tooling for Recess Turning
The following tooling may be used:
- External and Internal insert-holders with all insert types except
groove and thread.
- Internal, External and Frontal Groove insert-holders with groove and
Refer to Trigon Insert Used on
a Groove Insert-holder for more information about this tooling
Note that the following attributes may influence machining (they are
located on the Insert-holder's Technology tab):
- Gouging angle
- Trailing angle
- Leading angle
- Max Recessing Depth
- Max Cutting Depth
- Max Boring Depth.
These attributes take tooling accessibility into account and may reduce
the machined area.
However, you can use the Insert-Holder Constraints option on the
operation editor to either ignore or apply these tooling attributes. You
can replay the operation to verify the influence of these attributes on the
generated tool path.
Note that the Insert-Holder Constraints setting does not
influence the Gouging Safety Angle or the
Leading and Trailing Safety Angles defined in
the operation editor.
Geometry for Recess Turning
Part and Stock profiles are required. They can be specified as follows:
- select edges either directly or after selecting the By Curve
contextual command. In this case the
Edge Selection toolbar appears to help you specify the guiding
- select the Sectioning contextual command. Please refer to
Sectioning for details of how to use this capability.
Please note that the sectioning selection method is not associative.
Orientation for Recess
Orientations are proposed:
internal, external, frontal and inclined.
The selected Orientation defines the type of
geometric relimitation to be done between the stock and part geometry in
order to determine the area to machine. For an
inclined orientation you must specify the
Part and Stock Offsets
for Recess Turning
- Stock offset, which is defined perpendicular to the stock
- Part offset, which is defined perpendicular to the part
- Axial part offset
- Radial part offset.
Offsets can be positive or negative with any
absolute value. The global offset applied to the
part profile is the resulting value of the normal, axial and radial
Machining Strategy Parameters for Recess
Path Definition for
Lead-in, Lift-off and
Attack for Recess Turning
- Lead-in Distance
Defined with respect to the cutting direction. It takes the stock profile
and stock clearance into account. The tool is in RAPID mode before this
- Attack Distance
Defined with respect to the cutting direction and the stock profile with
a stock clearance.
- Angle and Distance before Plunge
Define the plunge vector before each new pass with respect to the cutting
- Lift-off Distance and Lift-off Angle
Define the lift-off vector at the end of the last pass with respect to
the cutting direction. The figure below shows the effect of a positive
lift-off angle (external machining is assumed).
Feeds and Speeds for Recess Turning
Speed unit can
be set to:
- Angular: spindle speed in revolutions per minute
- Linear: constant cutting speed in units per minute
then you can give a Machining Speed value.
- Machining Feedrate
- Lead-in Feedrate, which is applied during the lead-in and attack
- Lift-off Feedrate
- Contouring Feedrate
- Plunge Feedrate.
Feedrates in units per minute are also available for air cutting such as
macro motions and path transitions.
Note that RAPID feedrate can be replaced by Air Cutting feedrate in tool
trajectories (except in macros) by selecting the checkbox in the Feed and
Speeds tab page
indicates whether the tool dwell at the end of each path is to be set in
seconds or a number of spindle revolutions.
Please note that decimal values can be used for the number of
revolutions. For example, when machining big parts that have a large
volume, it can be useful to specify a dwell using a value of less than one
revolution (0.25, for example).
Example of one-way
Recess Turning. Note that Trailing angle is defined on the tool.
In the figure below the tool motion is as follows:
- approach in RAPID mode
- lead-in at the first recess pass and plunge approach for other passes
- plunge at plunge feedrate
- machine at machining feedrate
- contouring at contouring feedrate
- lift-off at last recess pass at lift-off feedrate.
Compensation for Recess Turning
You can select a tool compensation number
corresponding to the desired tool output point. Note that the usable
compensation numbers are defined on the tool assembly linked to the
machining operation. If you do not select a
tool compensation number, the output point corresponding to type P9 will be
used by default.
Note that the change of output point is
managed automatically if you set the
Output Point option.
If the output point is consistent with the flank of the recess to be
machined, the output point is changed when the other flank of the recess is
At the end of the operation, the output point is the same as it was at
the start of the operation. See
Changing the Output Point for more
Approach, Retract and Linking Macros for
Approach and Retract macro modes are proposed:
Direct, Axial-radial, Radial-axial, and Build by user.
The selected macro type (Approach or Retract)
defines the tool motion before or after machining.
Various feedrates are
available for the approach and retract motions (RAPID, lead-in, lift-off,
and so on).
Linking macros, which comprise retract and approach motion can also be
used on Recess Turning operations.
Approach and retract motions of Linking macros are interruptible. It can be
useful to interrupt an operation when the foreseeable lifetime of the
insert is not long enough to complete the machining.
Define Macros on a Turning Operation for more information.