How to extrude a circular surface with holes arrayed around an inner circle without excluding the inside surface in Inventor?

Autodesk Support

Oct 8, 2023


Products and versions covered


Issue:

When creating and extruding a sketch with two concentric circles, where the inner one represents the array line for holes, the inner surface is excluded from the extrusion (see pictures bellow).
How can the inner circle be eliminated from the profile selection, so that the surface is created after the outer circle and just the lines that describe the holes? 
 
Sketch Example

Create Pattern
Create Sketch Pattern

Finished Pattern
Extrusion Example

Create Extrusion
Create Extrusion
The inner surface is excluded

 

Causes:

The sketch for the inner circle was created using "Normal" geometry which is considered for the profile extrusion.

Solution:

To solve this issue, the circle will need to be turned into Construction Geometry before exiting the sketch. 
To do that:
  • Select the dimension line, right click on it and go to "Select Other";
Pre-select the circular dimension
  • Select  "Curve", as this is the sketch geometry;
Select from drop down menu
  • Select the Construction geometry;
Select Construction Geometry icon
  • The Extrusion will no longer pick up the array circle as geometry for the profile.
Extrusion

 

Products:

Inventor; Inventor Factory; Inventor Professional; Inventor Series;

Versions:

2017; 2016; 2019; 2018;


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