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CATIA V5´s greatest improvement over V4 could probably said to be in creation and handling of Parametric Solid bodies. Using functions like `Offset´ and `CloseSurface´, surface entities may also be seemlessly integrated into Solid-Based Design work, as our completed `button´ demonstration shows below.

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WORKBENCHES TO BE USED:

    wireframe and surface    Part Design (Solid Modelling)    


revolution surface 

Close - Stitch

constraint 

Fillet

line 

Shell

Leaving CATIA 2D parametric drawing sketcher 

No Show

To complete our button, we will need the trimmed surface entities that were created in the previous demonstration. You may also swap between show/no show to select the needed trimmed faces and leave any undesired parent entities(i.e. shetches) hidden. As the side faces of our botton were extruded from a planar rectangular profile, the bottom of our hollow `quilt´ should be planar. Planar openings in collective face quilts can be filled, and the resulting closed body automaticaly upgraded to a solid, using the `close surface´ function.

1. Select the quilt entity and choose the `Close Surface´ function. Our Solid should be now created problem-free.solid

2. Since our Button may not have any hard edges on the `visible side´, a Fillet radius should be applied. Caution is advised when selecting the desired radius measurement of our fillet. Some branches of design engineering must obey certian NORM standards dictating the minimum radius of a fillet that will come in contact with the end user (or the OEM customer may have a corresponding in-house standard). We must also plan our model: our next and final step will to refine our solid body to a thin-wall housing Shell, so we want to provide a radius definition greater than the thickness of our proceeding  inward Shell thickness. NOTE: If the Shell is to be outwards, this concern is then irrelevant. We will enter a Fillet radius of 2.5mm.

3. In the final step of this demonstration, we will `Shell´ our button, that is, reduce or rounded block to a hollow, thin-wall part with an open bottom.

 

 

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