Defeaturing with Filters

Open a 3D shape representation with recognized holes, fillets, logos, and chamfers.

1. Click Defeature a shape in the Part Design Feature Recognition toolbar

   The Defeaturing dialog box appears. This dialog box enables you to add or manage the list of activated filters.

2. Click . A list of filters appears. Select any of the following options:

   Fillet filter Logo Filter Hole filter Chamfer filter

   If you select:

   Fillet filter: The Fillet filter dialog box appears. Hole filter: The Hole filter dialog box appears. Logo Filter: The Logo filter dialog box appears. Chamfer Filter: The Chamfer filter dialog box appears.

   You can select multiple filters of the same type. These filters maintain OR condition among them, that is for any geometry to be filtered out, it must satisfy the criterion of at least a single filter. The depth of the feature must be up to 5mm, to be considered as a logo.

3. In the Fillet filter dialog box, under the Basic section, select:

   The Minimum radius value check box and provide a lower limit of the radius value. That is, all the recognized fillets with radius equal to or greater than this radius value are filtered out from the fillets to remove. The Maximum radius value check box and provide an upper limit of the radius value. That is, all the recognized fillets with radius equal to or less than this radius value are filtered out from the fillets to remove. Both Minimum radius value and Maximum radius value check boxes and provide a range of radius value with Minimum radius value less than Maximum radius value. That is, all the recognized fillets with radius lying between these values are filtered out from the fillets to remove. You can recognize and remove only edge fillets (with a selective exception to conic fillets). The operation is unavailable for variable radius fillets and tri-tangent fillets.

4. Under the Advanced section, select:

   The Minimum length check box and provide a lower limit of the fillet ribbon length. That is, all the recognized fillets with length equal to or greater than this length value are filtered out from the fillets to remove. The Maximum length check box and provide an upper limit of the fillet ribbon length. That is, all the recognized fillets with length equal to or less than this length value are filtered out from the fillets to remove. Both Minimum length and Maximum length check boxes and provide a range of length values. That is, all the recognized fillets with lengths lying between these values are filtered out from the fillets to remove. Similarly, you can select Minimum angle and Maximum angle check boxes and can define a minimum limit, a maximum limit, or a range of limits for the fillet angle values. The Filter out wall fillet pairs check box and enter a value in the Max thickness box to filter out the wall-fillet pairs with thicknesses smaller than or equal to it, from the fillets to remove. The Auto max thickness check box to filter out all the wall fillet pairs irrespective of the wall thickness, from the fillets to remove.

   The filter for fillet features is listed under Activated filters.

5. In the Hole filter dialog box, select:

   The Minimum diameter value check box and provide a lower limit of the diameter value. That is, all the recognized holes with diameter equal to or greater than this diameter value are filtered out, from the holes to remove. The Maximum diameter value check box and provide an upper limit of the diameter value. That is, all the recognized holes with diameter equal to or less than this diameter value are filtered out, from the holes to remove. Both Minimum diameter value and Maximum diameter value check boxes and provide a range of diameter value with minimum diameter value less than maximum diameter value. That is, all the recognized holes with diameter lying between these values are filtered out, from the holes to remove.

6. Under the Advanced section, select:

   The Minimum depth check box and define the lower limit of the hole depth. This filters out all recognized holes with a depth equal to or greater than this value, from the holes to remove. The Maximum depth check box and define the upper limit of the hole depth. This filters out all recognized holes with a depth equal to or less than this value, from the holes to remove.

   
   The filter for hole features is listed under Activated filters.

   Notes:

   You can recognize and remove simple, counterbored, counterdrilled, and countersunk holes having flat bottom, V-bottom with blind, up-to-next, up-to-last extension limit. The hole may or may not be threaded. Note that blind holes must have either flat bottoms (planar) or V-bottoms(conical). After activating a filter, the same filter is no longer listed if you click . So if you activate both the hole and the fillet filter, the option to add a filter becomes unavailable.

   
   
7. In the Logo filter dialog box, select:

   The Minimum size check box and define the lower limit of the logo size. This filters out all recognized logos with a size equal to or greater than this value, from the logos to remove. The Maximum size check box and define the upper limit of the logo size. This filters out all recognized logos with a size equal to or less than this value, from the logos to remove.

   
   
8. Under the Advanced section, select:

   The Minimum height check box and define the lower limit of the logo's height. This filters out all recognized logos with a height equal to or greater than this value, from the logos to remove. The Maximum height check box and define the upper limit of the logo's height. This filters out all recognized logos with a height equal to or less than this value, from the logos to remove.

   The filter for logos is listed under Activated filters.
   
9. In the Chamfer filter dialog box, select:

   The Minimum chord length check box and define the lower limit for the chord length. This filters out all recognized chamfers with a chord length equal to or greater than this value, from the chamfers to remove. The Maximum chord length check box and define the upper limit for the chord length. This filters out all recognized chamfers with a chord length equal to or less than this value, from the chamfers to remove.

   The filter for chamfer features is listed under Activated filters.
   

10. To edit a filter, double-click the filter listed under Activated filters.

11. To remove an added filter, select the filter in the Defeaturing dialog box and click .

12. Once you have added or edited the required filters, Click OK.

    Features are selectively removed as per the filter specifications. The Defeaturing.x node is added in the specification tree. The specified filters are also summarized under this node.

    You can click Preview in the Defeaturing dialog box to visualize the geometries, which have been recognized for removal. The recognized geometries will be colored and highlighted in the 3D area.

13. To edit the filters, double-click the node Defeaturing.x in the specification tree. Defeaturing dialog box appears for edition.

Case in which conic edge fillets can be defeatured

Defeaturing with fillet filter as angle