Week 8 - Challenge 2 - Switch Bezel Design
Object :- Create a tooling axis in proper way for finding better draft analysis from given class A surface. Create draft analysis of class A surface and create class B and class C surface from class A surface. And finally create draft analysis of finished body.
Consider the thickness of the component 2.5 mm.
Introduction :- This project is done on CATIA software. This software is different from other. It is easy to designing for surface modelling. It,s have more accuracy than other.
Class A Surface :-
In automotive design application Class A surfaces are created on all visible exterior surfaces (ex; body panels, bumper, grill, lights etc.) and all visible surfaces of see-touch & feel parts in interior (ex: Dashboard, seats, door pads etc.). This can also include beauty covers in the engine compartment, mud flaps, trunk panels and carpeting. This surface has 0 mm thickness.
Given Class A Surface
Tooling Axis :- Tooling Axis(tooling direction) is main consideration for plastic part and mold parts because it defines movement of mold part and possibility of plastic part to come-out from mold part (Core and Cavity). In Molding machine arrangement is given to open the mold along a direction which is known as Tooling Direction. The mold is built from two separate halves (Core and Cavity) and tooling direction basically define the direction of mold pulls apart. Tooling direction is known as primary direction.
Here I created a tooling axis. First of all I draw a intersection curve of class A surface according to figure and consider the line along teper surface. Then we create 2 line, after it I create bisecting line.
After it I have created line on 6 degree with respect to another taper surface according to this figure.
And finally I have created a bisecting line with the help of 2 result line which have come above 2 figure.
Draft Analysis :-
The Draft Analysis allows the user to easily analyze a part for proper draft angle. A Draft Angle describes the amount of taper for molded or cast parts perpendicular to the parting line. Draft Analysis is applicable for 3D part models. To create a Draft Analysis for any 3D part file, the user needs to select part/surface and select the pull direction. User can change the pull direction of the part/surface.
Draft Analysis of Class A Surface In CATIA :- It provides color based indentification. With the help of this we can easily find that which surface is in clear and which is in stuck by color chenging. Here I give the draft angle 3 degree. The result in color based that the surface which green ( means draft angle > 3 degree) is right. And where the color is blue mean draft angle is 3 degree to 0 degree if this blue surface area is low then you can go. If you find red color zone then it means draft angle is less than 0 degree. Then you will have to create tooling axis by another way if possible otherwise you can say your design engineer to correct for designing.
Class B Surface :- The surface which is back side of Class A surface is called Class B Surface. Mostely it not visible. It is created with the help of Class A surface with some distence (thickness) like 2mm, 3mm etc.
Here I created Class B Surface on 2.5mm from Class A Surface.
Class C Surface :- The Class C surface is the back side of a part of a surface that is permanently covered by another part.
- With the help of join and trim feature I have created a closed surface body.
Draft Analysis of Part Body :-
I have allready descrived above on it. You can see there. Here you can see that C surface is looking red. Absolutely it should be in red because it will help in removing the part.
Feature Tree of this Part :-
Conclusion :- In this project we learnt that how to find tooling axis in appropriate way and draft analysis. And how to create Class B and Class C Surface from Class A Surface.