Week 8 - Challenge 1 - Base Bracket Design

BASE BRACKET DESIGN BY USING CLASS A SURFACE 

AIM: 

• To design a Base Bracket Plastic component through the given Class-A surface by creating a tooling axis and draft analysis of the given surface.  

DESIGN PROCEDURE: 

• To setup the class-A surface and to creating a tooling axis  
• add draft angle  
• To create a base surface of model 
• To create a B-surface  
• To create a C-surface and surface model of a base bracket 
• To use close surface for creating a solid part model 

CLASS-A SURFACE:

 A surface means visible surface.it will give styler

TOOLING AXIS: 

The direction in which the mold or core and cavity opens is the tooling axis. 

• Tooling axis can be classified into two methods 

1. direct method
2. bisecting method:

• The direction in which the mould open and closes is the tooling axis.
• Check the connectivity of the surface and ensure there will be no gap between the surfaces and then define the tooling axis.
• While creating a tooling axis give the tooling axis on a flat length surface or the surface which have a hole on it.
• Create a point on the surface where we are going to create the dummy tooling axis and using line command crate an axis. If there is a circle or flat length surface which is recommended.

DRAFT ANALYSIS: 

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

• The Drafting analysis was performed on the class-A surface by using the Feature Draft Analysis command. 
• Using this command, the compass was set on the main tooling axis and the Draft angle was changed to 3 degrees.

CREATING CLASS-B SURFACE: 

The Class B finish is a quality finish with only minimal imperfections.

• To select the flat surfaces in class A
• Untrim all flate surfaces
• extapolite all surfaces and trim unwanted surfaces
• offset the surface down to 2.5 mm

CREATING C- SURFACE: 

Class c surface is a thickness of class A and class B

• To create a boundary on the class-A surface and use sweep for extended throughout the B-surface for creating a surface model. 
• Similarly holes also created by using swept tool along tooling axis. 

SURFACE MODEL OF A BASE BRACT: 

• Drafting analysis for final model

• SOLID MODEL OF A BASE BRACT:
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MATERIALS USED IN BASE BRACKET

• Polycarbonate glass fiber
• Polycarbonate composite
• polyurethane composite
• Polycarbonate
• thermoplastic polyurethane
• fiber reinforced polycarbonate