Week 8 - Challenge 4 - Coin Holder Design

CREATION OF CLASS A, B AND C SURFACES, TOOLING AXIS AND DRAFT ANALYSIS FOR COIN HOLDER

OBJECTIVE:

The main objective of this project is to create the class A, B and C surfaces, tooling axis and the draft analysis for the coin holder using CATIA V5.

Introduction:

The tooling axis is very important for the component to be manufactured, keeping that tooling axis as reference the part can be manufactured. The draft analysis will show the important angles of the body, it is very important to maintain positive draft angle. The ejecting part should have the draft angle for easy removal.

CREATION OF TOOLING AXIS

The tooling axis is basically the direction towards which mould pulls apart. The mould is built in two separate pieces, cavity and core. The core pulls apart from the cavity along the tooling axis. Here we have created the tooling axis by bisecting method.

At first, we find the possible tooling direction by visually checking the part. Here we have found that by viewing that from z direction we can clear all the faces.

Then we extrude the base surface.

Then a point on the surface is created by taking CG point and put a new axis system.

Then we create the line perpendicular the surface, so we create our tooling axis.

CREATION OF B SURFACE

First, we create the side wall be extracting the surface from class A and then we untrimmed the all the extracting surface.

Then we extrapolate the untrimmed surface so that the untrimmed surface can intersect, then we trim the surface together and we offset the surface to create 2.5mm thickness.

Similarly, we create the top wall, outer flange, base and we trimmed them all together to form class B surface.

CREATION OF C SURFACE

To create we need to create sweep, to form a sweep we used the with reference surface command.

To create the reference surface, we extract all the adjacent surface to the boundary and the angle given is 90 deg.

Then we trim together all the surfaces to create the final design.

DRAFT ANALYSIS: