Defeature holes / chamfers / fillets of objects

Introduction

The operation of Defeature holes / chamfers / fillets of an object allow to:

Add matter in cylindrical holes whose diameters are smaller than a maximum diameter entered by the user
Defeature Chamfer whose distances are smaller than a maximum distance entered by the user
Defeature fillets whose radius are smaller than a maximum radius entered by the user

The operation Defeature holes / chamfers / fillets of an object is described by:

The name of the operation geometric (by default DEFEATURE_1)
The object to defeature
To defeature fillets:
- The desired maximum radius below which detected fillets are defeatured
- The maximum angle between supports of fillets (by default: 175°)

To defeature chamfers:
- The desired maximum length below which detected chamfers are defeatured
- The maximum angle between supports of chamfer (by default: 105°)

To defeature holes (only cylindrical) :
- The desired maximum diameter below which detected holes are defeatured
- An option of detection of spheres

Each type (fillet, chamfer, hole) has a button which allows unfolding parameters to define an to apply during the defeaturing

Here are some examples illustrated to show how the user values are taken into account.

The application of a defeaturing of objects has as result:

A geometric operation DEFEATURE_1. This geometric operation is a specific entity of the modeler that permits to ensure the cycle of life of the construction (creation - modification - deletion).
A defeatured object
The operation DEFEATURE_1 has been added in the list of geometric operations linked with the defeatured object.

The user have the following choice:

The defeaturing of holes / chamfers / fillets of an object may be done in only one geometric operation
or independently by achieving a defeaturing operation for each type to defeature

The different accesses of the geometric operation Defeature hole / fillet / chamfer of an object are:

The process of creation of a Defeature an object is presented in the table below.

Stage	Description
1	Opening the dialog box Defeature hole/chamfer/fillet
2	Choice of name of the resulting geometric operation (by default: DEFEATURE_1)
3	Choice of object to defeature
4	Choice of parameters of defeaturing of fillets: Click on button Defeature fillets to unfold the options Click on the check-box Defeature fillets to active the options Choice of maximum radius beyond which the fillets will not be defeatured Choice of the maximum angle between supports (by default: 175°)
5	Choice of parameters of defeaturing of chamfers: Click on button Defeature chamfers to unfold the options Click on the check-box Defeature chamfers to activate the options Choice of maximum length beyond which the chamfer will not be defeatured Choice of the maximum angle between supports (by default:105°)
6	Choice of parameters of defeaturing of holes: Click on button Defeature holes to unfold the options Click on the check-box Defeature holes to activate the options Choice of maximum diameter beyond which the chamfer will not be defeatured Choice of taking into account the detection of spheres (yes or no, no by default)
7	Choice of faces to keep: Click on button List of faces to keep during the defeaturing to unfold the options Choice the list of faces to exclude
8	Validation by clicking on OK

Somes limitations :

No preview available at the creation and at the modification
Applicable only on one object: repeat the operation on each object to defeature
No cylindrical holes are not detectable, so no defeaturing possible (section square, rectangular, oval…)