The loft tools for removing material consist of the same elements as the loft tools for creating or adding material, except for parts. To remove material with a Loft to Part operation requires an additional subtract operation.
A loft for removing material must be placed inside an existing part.
In the following figure, the loft removes material from inside the part.
To remove material from a part (or parts) by lofting, you need to position workplanes and profiles so the loft they define passes through that part. After adding the matchline, you are ready to remove material by loft. Creo Elements/Direct Modeling uses an option box to provide the necessary information for each freeform operation.
To remove material by lofting,
1. Click Modeling and then, in the Model group, click More.
2. Click Remove in Basic Loft section. The Loft Remove dialog box opens.
3. Set the following:
◦ Parts - Specifies the name for the part (or parts) to remove the loft from. You can use the browser (Browser) to specify the part. The default is the active part.
◦ WP Set - Specifies the workplane set. You can use the browser (Browser) to specify the workplane set.
◦ Preview - Allows you to preview the resulting loft.
◦ Smooth - Generates a smooth loft surface by removing edges between adjacent faces which are connected by a smooth tangential transition.
◦ AutoWeight - Calculates a varying tangent weight and tries to optimize the shape automatically. This option becomes active when you add a tangent to a workplane or profile.
◦ Check Part - Automatically checks part for corruptness during the removal of lofted material. Note: Although you can remove lofted material more quickly by switching off Check Part, you might also create a corrupt part. We recommend that you keep Check Part switched on, because the part checker will later not be able to detect that the part is corrupt.
◦ Keep Set - Specifies whether or not to keep the workplane set, profiles and matchlines after the loft operation. The default is to keep them.
◦ Closed - Specifies whether or not to close the resulting loft. A closed loft means the vertices in the last workplane in the set will be automatically joined to the corresponding vertices in the first workplane as though a matchline were drawn between them. The profiles cannot be parallel. The default is set to NOT close the loft.
Remove in Basic Loft section. The Loft Remove dialog box opens.
to complete the operation.