Challenge

Week 8 - Challenge 1 - Base Bracket Design

SSandeep M5 Mar 2023

AIM

To Create the Base Bracket Plastic component through the given Class-A surface.

THEORY

Tooling Axis

Tooling Axis is the direction in which the mold or core and cavity opens and closes. While designing a component first thing is to define the tooling axis.

Procedure

Check the connectivity of given Class A Surface i.e no gaps between the surfaces.
Analyse the component along x,y,z direction and check which is the best possible tooling direction (Here Z)
Before creating ac6tual toolin axic we have to create a Dummy Toolin Axis from the line command. this will help us to clear visualization and to avoid confusion between the directions.
Create intersection through x and y axis. create two lines with reference of faces separately for x and y which we think will create problems.
Create a bisecting line with the lines drawn along with both direction.
Now we have bisecting lines along x direction and y direction. create a bisecting line along these two bisected lines which will gives us the tooling axis.
Here in this case we have created intersection along one direction only. So the first bisecting line will give us tooling axis.

Draft Analysis

Draft analysis is used to analyze whether the part model created in CAD id manufacturable based on the draft condition applied.

Draft is required on all parts in the direction of mold movement in order to allow parts to release or eject from the mold properly. Most part or application require minimum `0.50^o - 1^o` as draft angle, however `3^o` is widely accepted as the norm.

Procedure

First change the view to " Customize View Parameters" and select Material option.
Select Feature Draft Analysis from the tool bar.
Click on the direction, drag and drop the compass to the component such that it should coincide with the tooling axis.
Lock the draft direction and click on the component.
Green colour shows the positive draft, red as zero degree and blue as negative draft

Class A Surface: Class A surface is any of a set of freeform surfaces of high efficiency and quality. In other words, Class A surface is the aesthetic surface.

Class B Surface: Class B surface is the thickened suface or engineering surface where all ribs etc will come.

Class C Surface: It is the Surface which joins Class A and Class B surfaces.

SOFTWARE USED

Catia V5

DESIGN

Tree Structure