DESIGN OF COIN HOLDER USING CATIA

Coin Holder Design

Introduction:

Coin holder is a plastic trim part which is usually placed between the driver and co-driver seat. In this challenge we will be creating a solid model of the coin holder with Class A surface as the input.

Tooling Axis Creation:

i. Main Tooling Direction:

In this model the walls of the model are perpendicular to the Y axis therefore the tooling axis is created along the Y Direction. Draft analysis highlighted the walls blue in colour as they were exactly parallel to Y axis which means they have 0 degrees draft.

ii. Side Core Tooling Axis:

• A point is created near the hole using the by extracting the arc like feature on the outer flange of Class A Surface.

• A line is created along Z direction with the point as a base. Then another line is created at an Angle of 45 degrees with the line which was created on ZX plane. This line will act as a side core axis.

Draft Analysis Result of side core axis:

Class B Surface creation:

Class B surface is the one which contains the features which improves the strength of the part, the features which are used to position or mount the part over the base part and other engineering features. In this model the B surface is created by extracting the flat faces of the model. Once the surfaces were extracted, and they were offset to 2.5 mm outwards and joining them together. 

Class B surfaces:

i. Base:

ii. Side Walls:

iii. Angled Surfaces of the base:

iv. Angled Surface at the top:

v. Outer Flanges:

vi. Class B Surface:

All these features were trimmed together to create a Class B Surface.

Class C Surface:

i. Class C surface:

Class C surface is created using Sweep option and is perpendicular with reference surface.

Closed shell:

Once the Class B and Class C surface were created, they were joined using Join and the Trim commands. The image below shows the closed shell model on the coin holder.

Solid Body:

Solid Model of this shell is created by using the closed curve option on the Part Design module.

CONCLUSION:

Thus the solid model of the coin holder is created and draft analysis is performed on the model using the main tooling direction and the side core tooling direction.