Week 8 - Challenge 3 - Coin Holder Design

AIM:- Create the Coin Holder Plastic component through the given Class-A surface. To begin with, the tooling axis for the given Class-A Surface should be created meeting the requirements of the draft angle and at the end perform the Draft analysis on the model.

Take the Thickness of the component to be 2.5 mm

OBJECTIVE:

• To ensure proper tree structure is followed.
• Geometrical sets should have a proper name based on the sketches present inside of it.
• All the sketches should be created under the geometrical set.
• Use of the close surface feature to make a solid body from the surface.
• To publish the tooling axis, class A, B and C surface.

PROCEDURE:

• First import the class A surface of center console coin holder model in catia V

TOOLING AXIS:

• Now we need to create the tooling axis for the center console coin holder model. Visually check which direction is better for creating tooling axis. Now in order to create the tooling axis in z direction, first create a reference point on any surface as shown in below figure.

CLASS B SURFACE:

• Consider the thickness of the component as 2.5mm. Now we need to create a B surface which will be similar to the A surface at an offset value of 2.5mm.
• In this operation we are creating A class B surface in 4 different geometrical sets.
• First, we are creating a side wall. To create this surface, we need to extract the class A surface as shown in below in below figure.

• Once the surface is extracted , untrim it and then extrapolate it by a required value on each side using point continuity. Trim them to form proper walls. Now offset it by 2.5mm.

• Similarly, we need to extract the base, top wall and outer flange surface of the center console coin holder in different geometrical sets and perform similar operations on it as mentioned above.
• Once all the surface are created trim these surface to form a class B surface. Give the appropriate fillets to form class B surface.

CLASS C SURFACE:

• To create a class C surface, first extract the boundaries of the class A surface and extract the adjacent surfaces to the boundary as shown in the figure below.

Now using the sweep option create the surface.

TRIM SURFACE:

• After creation of class A, class B and class C surfaces, we need to trim class B and class C surface to form a new surface. Then join the trimmed surface with class A surface to form the final required surface.

• Now using the close surface option from part workbench form a solid body from surface body.

• DRAFT ANALYSIS – to perform draft analysis on the center console coin holder model, first set the view parameters to material mode.

• Then Go to Menu bar > Select insert > Analysis > Feature draft analysis.
• To give the draft direction, use the compass and align Z – axis of it with the final tooling axis for the center console coin holder model. Once it is properly aligned, lock the draft direction. Select the center console coin holder and it will show us the current draft angle of the model. Set the draft value to 3 deg under the colour scale variant and press ok.

SOLID BODY DRAFT ANALYSIS

TREE STRUCTURE: