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Intersect Command - Easily Create Design Bodies in Reverse Engineering Workflow

Siemens Enthusiast Siemens Enthusiast
Siemens Enthusiast


Have you ever created a design body or continuous chained faces from intersecting surfaces in a single click? No, I am not kidding. This is now possible with the newly enhanced Intersect command in SolidEdge 2019.

We’ve enhanced the Intersect command to auto-trim the intersecting surfaces to form chained faces and create the solid body/bodies if intersecting surfaces form a closed volume.


Prior to this enhancement, creating a solid body from the multiple intersecting surfaces was possible, but it was a tedious and time-consuming process. The user had to manually select and trim the different surfaces, which occasionally could lead to errors.


This enhancement mainly benefits you while reverse engineering a product. When converting faceted data from STL files into solid bodies, instead of trimming and extending surfaces manually, we can use the auto-trim option to create a solid body.


Intersect has been enhanced in both the synchronous and ordered part environments.


Intersect command

Intersect command is available in both ordered and synchronous modeling under the surfacing tab

Surfacing-->Modify Surfaces-->Intersect



The Intersect command bar has a new look with additional controls.



New controls

  1. Auto-trim:- This option is used to intelligently trim the intersecting faces to form chain faces or a closed volume.
  2. Create design bodies:- If intersecting faces create a closed volume, then a solid is created
  3. Invert selected regions:- This is a toggle option to change the selected region
  4. Volume Regions:- Controls the multiple regions created using the Create Design Bodies option 


How to use the Create Design Bodies option

  1. Start Intersect command
  2. Select the ‘Create Design Bodies’ option from the Intersect option
  3. Select the faces to trim (Using Fence Select or individual selection)
  4. Accept the input, and it will show the preview
  5. Select the different regions from the volume region dialog. You can optionally select the different regions from the region list.
  6. Optionally use the invert button to toggle the region.
  7. Accept the result to create a solid body from closed intersection surfaces


Example 1:-Blog_3.JPG


Volume Region DialogBlog_4.JPG



Example 2:- Reverse Engineering (converting a mesh model to a b-rep model)





How to use the Auto-trim option

  1. Start Intersect command
  2. Select the ‘Auto-trim’ option from the Intersect option
  3. Select the faces to trim (Fence select or individual)
  4. Accept the input, and it will show the preview
  5. Optionally use the invert button to toggle the trim face(s).
  6. Accept the result.


Use the Auto-trim option in the Intersect command to form closed volumes (1), closed surface loops (2), or a continuous chain of surfaces (3) resulting from intersecting surfaces. The option reduces the amount of manual surface trimming required to define one of these results.

The Auto-trim option requires two or more surfaces as input to perform the trimming operation. Use Ctrl+click to add a region of the trimmed surface to the result. To remove a region of the trimmed surface, click the region.


1. Closed VolumeBlog_6.JPG



2. Closed surface loops



3. Continuous chain surfaces




In summary, you can now quickly and easily create continuous chained surfaces or solid design bodies from intersecting surfaces without the manual work previously required, thanks to the newly enhanced Intersect command.

Siemens Dreamer Siemens Dreamer
Siemens Dreamer

Nice, Very Useful!