Week 8 - Challenge 3 - Coin Holder Design

DESIGN OF COIN HOLDER:-

AIM: To 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 2.5mm.

Design procedure:

1)FEASIBILITY CHECK OF CLASS "A" :-

• Checking Class A input for imperfections.

The input Class A surface is checked for the discontinuities and joined together to get complete Class A surface as one.

TOOLING AXIS CREATION:-

Generally tooling axis is created using bisecting line method. But in the components where it has a bin, then the tooling axis is considered as a line normal to the base surface of bin. Same is done with this component. A line normal to base surface is created and considered as tooling axis.

FEATURE TREE:-

Draft analysis of Class A:-

Draft analysis is performed on Class A to check the validity of the tooling axis.Draft analysis is performed on Class A to check the validity of the tooling axis. During draft analysis, it was observed that bin walls are having 90 degree angle with base. There is no minimum draft given to the walls. Since we are not authorised to make changes in Class A surface, we can inform Class A designer to give minimum draft to walls.

2)CLASS B SURFACE:-

As usual B surface is created using standard procedure by extract, un trim, extrapolate and offset commands. B surface of this coin holder is divided as base, side walls, top wall and outer surface. B surfaces of all these sub parts are created and trimmed together to join as single surface.

The offset distance is kept 2.5mm as component thickness is 2.5mm.

3)CLASS C SURFACE CREATION:-

Class C surface for this component is created using sweep command. All the ends of component surface was facing downwards, so the C surface will created perpendicular to B surface.To create C surface boundary of Class A surface and surfaces adjacent to boundary are extracted. Then sweep with reference surface commands is used and surface is created at 90 degrees.

4)FINAL TRIM OF A SURFACE WITH B SURFACE:-

5)CLOSE SURFACE:-

6)DRAFT ANALYSIS OF FINAL PRODUCT:-

The color bar in the draft analysis visualizes the green and red color. The surface draft angle greater than 3deg is highlighted with green color and the surface draft angle is less than 0deg will be highlighted with red color. Based on the compass alignment with the tooling axis, the colours may be swapped by inversing the draft direction, we can get the proper analysis. We can change the color bar color coding as per our requirements by customizing the colours.

CONCLUSION :-

Coin holder plastic component using class A surface have been succesfully created and draft analysis performed.Now we can move forward this design to create the B Side features.