Week 8 - Challenge 3 - Coin Holder Design

OBJECTIVE:

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

DESIGN METHODOLOOGY/APPROACH:

Draft Analysis:

Draft analysis is the analysis to examine whether the designed part is exit from the mould smoothly or not. Generally, 3 degrees from the Class A surface to be drafted. In the below diagram draft analysis is performed by given Class A surface.

Draft Analysis of Class A:

Draft analysis of final part:

Tooling axis:

Axis which drafts the part from certain angle is called tooling axis. Initially the part is checked in all direction for tooling axis, the suitable direction for tooling to be selected considering reduce the mould cost. In this part considering all axis Y axis is best for tooling. But there is Axis system is insert in the base surface which is extracted with point create the line which is parallel to Y axis, that line is Tooling axis.

The drawn tooling axis is shown below.

B Surface:

Base, Side wall, Top wall, Outer Flange:

class A surface divided into 4 Base, Side wall, Top wall, Outer Flange. These four surfaces are individually extracted, untrimmed, extrapolate and trimmed as per required surfaces individually. And finally, they are offset by 2.5mm. The following image are shown how the making of B surface.

Extracted surfaces:

Untrimmed surfaces:

Extrapolate surfaces:

Offset surfaces:

B Surface with trimmed and fillet:

C Surface:

Surface which connects the A surface and B surface is called C surface. It is done by initially make the Multiple extract in the Class A surface like boundary surface.

Then by using multiple extract the outer surface is extracted.

The next step is by using sweep command subtype as with reference surface adding angle 3-degree, draft direction is inward direction with 90 degree angle Sweep is done which shown in below figure.

After sweep there is a gap between them so they are extrapolating and trimmed to merge the gaps. The final C surface with A surface is shown in below.

Final part:

It is done by using the trim command in B surface and C surface. The final part is shown below.

And define the part body then the surface is made into solid body by using Closed surfaces which is shown in below.

Then the Class A surface, Tooling axis, Surface B and surface C is published in feature tree.

Conclusion:

So, by using above method B and c surfaces are made from Class A surface and final part is made.

Expanded tree structure 1:

Expanded tree structure 2:

Expanded tree structure 3:

Expanded tree structure 4:

Expanded tree structure 5:

Isometric view:

Front view:

Side view:

Top view: