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How to Add Features to a Folded Edge
  • How to Add Features to a Folded Edge

    Posted on May Fri, 2019 by seacad_admin

    When designing a formed sheet metal part, you may find some individual features are more appropriate to add in an unfolded state, such as a circular cut across a bend.

    To add these specific features, the Unfold and Fold commands can be used to temporarily flatten selected bends, apply the feature, then refold.

     

    Suppose we want to add a hole to the following part:

    Mark - sheet Metal postWe cannot just simply add a plane and proceed to do an extrude cut

    Mark - sheet Metal post2We can see the differences much better when we unfold the sheet metal to compare.As we can see from above, the cut hole shape is not the same as each other.

    As shown below, we can see that using the extrude cut method results in the hole being an oval or ellipse shape. Whereas by unfolding and following up with a extruded cut results in a proper circle cut onto the bend.

    Mark - sheet Metal post3

    1. Click the UNFOLD icon and select the planar face as the Fixed Face.
    2. For Bends to unfold select the bend faces as shown. Click OK.

    Mark - sheet Metal post5
           
    Note: Collect all Bends would completely flatten the part.

    1. Sketch a circle dimensioned as shown.

    Mark - sheet Metal post6

    1. Create a cut using Link to thickness.

    Mark - sheet Metal post7

    1. Click FOLD
    2. The Fixed Face is automatically detected from the previous operation.
    3. Now click Collect All Bends to automatically select all unfolded bends.
    4. Click OK.

    Mark - sheet Metal post9

    1. Examine the flat pattern. It should now look like this:

    Mark - sheet Metal post10

    With that, you now know how to add features to a folded edge

     

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