|This task shows how to insert a
Thread Milling operation in the program. For this operation,
machining is done in one or more helical passes. To create the
operation you must define:
HoleMakingOperations.CATPart document, then select the desired
A Thread Milling entity along with a default tool is added to the program.
The Thread Milling dialog box appears directly at the Geometry tab page .
|2.||Select the red
hole depth representation then select a threaded hole feature in the 3D
Just double click to end your selection.
The sensitive icon is updated with the following:
You can modify this data.
|3.||If needed, enter offset values for the Bottom and Contour.|
|4.||If needed, you can invert the tool axis direction by selecting the axis representation in the sensitive icon.|
Select the Strategy tab
set the following machining
Note that the figure displaying the toolpath in this page is different according the Machining strategy and Machining direction settings.
Also note that Breakthrough is not available when the Extension type in the Geometry tab page is set to Blind.
A tool is proposed by default when you want
to create a machining operation. If the proposed tool is not suitable,
just select the Tool tab page
to specify the
tool you want to use.
Thread mills or boring bars can be used in this type of operation. If you use a boring bar, machining can be done in Mono-pass mode only. If you use a thread mill in Optimized passes mode, the number of helical toolpaths depends on the effective thread length of the tool and the thread depth of the hole.
Refer to Edit the Tool of an Operation for more information.
Feeds and Speeds tab page
to specify the
feedrates and spindle speeds for the operation.
Note that in the toolpath represented in the strategy page shown above, tool motion is at:
|7.||Select the Macros tab page to specify the operation's transition paths (approach and retract motion, for example). The general procedure for this is described in Define Macros of an Axial Machining Operation.|
|Before accepting the operation, you should check its validity by replaying the tool path.|
|8.||Click OK to create the operation.|
If your PP table is customized with the following statement for Thread Milling operations:
A typical NC data output is as follows:
Note that the helical toolpath is generated with GOTO statements.
You can use Edit Cycle to edit or choose output syntaxes. For more information please refer to Editing Cycle Syntaxes in Axial Machining Operations.
The parameters available for PP word syntaxes for this type of operation are described in the NC_THREAD_MILLING section of the Manufacturing Infrastructure User's Guide.