Challenge

Week 8 - Challenge 4 - Coin Holder Design

TTirupathi Rao Kolli25 Feb 2021

CREARE THE COIN HOLDER DESIGN AND DRAFT ANALYSIS

AIM -

To create the coin Holder Plastic component through the given Class-A surface and at the end performing the draft analysis on the model, also to create the B side features for the Coin Holder considering the Design rules.

OBJECTIVES :- 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 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 Improve the Class A Surface of center Coin Holder model In CatiaV5.

Check the connectivity of Class A Surface using Boundary option.Ensure that there is no gap between the two surfaces.

TOOLING AXIS –

Now we need to create the tooling axis for the Coin Holder model. Visually check which direction is better for creating tooling Axis in Z –Direction, first create a reference point on any surface as shown in below.

Now using the reference point, create a line normal to the surface. This line will gives us the tooling axis.

B SURFACES :-

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

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 2.5 mm.

Similarly, we need to extract the Base, Top wall and Outer Flange surface of the Center Coin Holder in Different geometrical sets and perform similar operations on its as mentioned above.

Once all the surfaces are created trim these surfaces to form a class B Surface. Given the appropriate fillets to from 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 surface to the boundary as shown in the below...

Now using the sweep option create the surface. To perform this operation , Go to the Toolbar sweep Profile type Line Subtype with reference surface Guide curve 1 (select the extracted boundaries Reference Surface (select the extracted surface angle and length as 90 degree and 4mm respectively and click ok..

TRIM SURFACES –

After creation of Class A, class B, Class C surface, 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 closed surface option from part workbench from a solid body from surface body.

DRAFT ANALYSIS –

To perform Draft Analysis on the 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 again Z –Axis of it with the final tooling axis for the Coin Holder Model. Once it is properly aligned lock the draft direction. Select the Coin Holder and it will show as the current draft angle of the model. Set the draft values to 3 degree under the colour scale variant and press ok.

CLASS A SURFACE DRAFT ANALYSIS –

SOLID SURFACE DRAFT ANALYSIS-

Using the analysis option, we can perform the draft analysis on class A surface and final part body of Coin Holder.

To publish the Tooling Axis and Class A, Class B, Class C surfaces first select them and then Go to menu bar Tools Publication. This will publish the Tooling Axis and Class A, Class B and Class C surface which will be available in the Tree Structure.

TREE STRUCTURE :-