Week 8 - Challenge 1 - Base Bracket Design

Objective:- 

• Using Class A Surface create class B Surface, class C Surface and tooling axis for the Base bracket in CATIA V5.
• Using Publication option publish tooling axis, and Class A, B, and C surface.
• Performing Draft Analysis on the model. 

Tools and software's used:-

• Software: CATIA V5 
• Tools, commands & features:
  • line & point 
  • offset
  • trim & untrim
  • extract
  • interpolate
  • boundary
  • sweep
  • joint
  • edge fillet

Introduction:

what is tooling axis?

tooling axis is the direction in which mold and cavity open.

what is surface?

It is the portion or region of the object that can first be perceived by an observer using the senses of sight and touch.

in this project we discussing three surface class A surface, class B surface & class surface.

• Class A-Surface: 

class A surface is sculptural surface means it is outer surface representing actual view to observer.

It's important consider mostly where aesthetic requirements held.

• Class B-Surface: 

 Class B surfaces are secondary surfaces mostly offsets of class A but are less important. It can be observe in such as glove box, flask, etc. It also can be said interior surface.

• Class C-Surface: 

It is invisible surface which held bounding to Class A and class B surface.

what is draft analysis?

The draft analysis technique is used to analyze whether our part model created in CAD is manufacturable based on the draft condition applied.

Procedure for designing Class A, B & C surfaces: 

while designing class B surface

• extracted surface of ribs 1, 2 and base surfaces from class A and offset it to 2.5mm.
• then used untrim, extrapolate, and trim feature used
• apply fillets by edge fillet as on class A surface.

while designing class C surface

• sweep command used to form Class C surface using class A surface
• also boundary command used to design holes.
• then join class C with class A

• now trim it with class B and A to form design

• after that close body in part workbench

Procedure for draft analysis

• to perform draft analysis first created tooling axis with the help of dummy tooling axis, intersection command.

• then align compass with direction of tooling axis (z-direction) 
• now with colour scale used entered 3deg, and hover the cursor over body.
• some spots shows patches so value is reduced to 2.5deg. 
• now the whole body is in green colour it means good.

 Conclusion:

Class B and C surface is successfully design and draft analysis verified.