Week 8 - Challenge 3 - Coin Holder Design

Class A surface

Given class A surface is visually analysed to understand its structure. We have to ensure that given class A surface is free from improper open boundaries and improper faces which is not worked.

Tooling axis

The axis upon which core and cavity slides to unload the workpiece is called tooling axis. The proper class A surface of coin holder is analysed in all three directions. With reference to the faces on X & Y directions, tooling axis is created.

Draft analysis

Draft analysis feature helps to check the class A surface, whether it is created as per the moulding standards. An important factor that has to be considered during moulding design is no faces of the component should be in a perpendicular to the base plane. All the faces should be at specific angle as per requirement (say 3 degrees). Using draft analysis feature the surface feasibility can be studied, initially the cordinate system should be placed on the tooling axis, base upon the cordinate system, angular value of the face is viewed with the help of colour distribution. The required max and min angle value should be feeded in the scale region. Based upon the preset angle value the colour of the component varies. Using the colour which is displayed on the component is concluded with whether the design standards is followed are not.

Class B surafce

Class B surface is also called as engineering surface which consist of supporting features to strengthen the component and screw boss to attach the componets to the main assembly. Initially main faces of the class A surface should be extracted for creating class B surface. No fillets should be extracted, since offsetting of fillets will create irregular surface or non proper surface which affects the final output of the component. Once the structure of the component is created then finally sharp edges can be filleted to create final component.

Class C surface

The surface which connects class A and B surfaces are Class C surface, it also closes the surface which helps in creating the solid body of the model which is used in manufacturing purposes.

Finished surface model of coin holder

Finished solid model of coin holder

Draft analysis on solid model of coin holder

Tree structure