CATIA-Week 8.3- Coin Holder Design

AIM :

To create the Coin Holder Plastic component through the given Class-A surface.

OBJECTIVE :

• To ensure that the model fulfils the draft angle criteria.
• To make a tooling axis, use the bisecting approach.
• Draft analysis must be performed on the provided Class A surface.
• To create the necessary Class B and Class C surfaces.
• Using the Close Surface feature, create a solid body from a surface

CLASS A SURFACE :

• Class A surfaces are those surfaces which are curvature continuous while providing the simplest mathematical representation needed for the desired shape and does not have any undesirable waviness.
• The Class A surface is the used to begin the design of a product.
• All the further intricacies of the component are created based on the Class A surface.

CLASS B SURFACE :

• The Class B surface is created from the Class A surface , keeping the thickness of the component in check.
• The Class B surface resembles an offsetted surface from the Class A.

CLASS C SURFACE :

• The Class C surface is used to bind the Class A and Class B surface together inorder to form a closed surface.

PROCEDURE :

Creating Tooling Axis

• Initially a base surface was extracted from the Class A to create a center point.
• An axis system was created upon this point.
• The Intersect feature was used to obtain a boundary of the Class A intersecting at the mid plane.
• Once the check for the discrepencies in the boundary is done, the Tooling axis was created from thr mid-point.

Check Class A Surface

• Check Class A surface properly at edges, corners for any disruptions of surfaces.
• If found any disruptions, need to create smoother class A surface.

Creating Class B Surface

• The Class B surface was formed from four diffrent segments of surfaces.
• The required surfaces were obtained from the Class A surface using Extract command.
• These surfaces were further expanded using Untrim and Extrapolate commands.
• The protuding surfaces were trimmed using the Trim command and a proper continuous surface was obtained.
• The same procedure was followed for all four segments.
• The necessary fillets were added to the Class B.

Creating Class C Surface

• The Class C surface is used to bind the Class A and Class B surface together inorder to form a closed surface.
• The Outer flange of the Class B was used in the Class C creation.
• It's outer boundary was extracted.
• The Sweep surface feature was used along with With reference surface option , selction the curve and the surface which was extraced earlier.
• The angle was entered as 90 degree so that the surface protudes outside therfore intersecting the A surface.
• The Hole present in the surface was also extened outside using the above steps.

Creating Solid Body

• Finally the Class A, B and C surfaces along with the hole were trimmed together to form a closed surface.
• Using the surface created the solid component was obtained using the Close surface feature present in the part workbench.
• The Tooling axis, Class A, B and C surfaces were published.

Draft Analysis

• The Drafting analysis was performed using the Feature Draft Analysis command.
• Using this command the compass was set on the main tooling axis and the Draft angle was changed to 3 degree.

MODEL RESULTS :

Feature tree

Front view

Top view

Side view

Isometric view

CONCLUSION :

• The creation of Tooling axis and Draft analysis were performed.
• The solid component was created from the surface geometry.
• The necessary screenshots and files were attached.