Week 8 - Challenge 1 - Base Bracket Design
Tooling Axis:
Tooling Axis is the direction in which the Mold opens and closes. Part Drafts are given along this axis.
MATERIEAL SELECTION :
Material:ABS Plastic(Acrylonitrile Butadiene Styrene)
Key Properties of ABS
- High rigidity.
- Good impact resistance, even at low temperatures.
- Good insulating properties.
- Good weldability.
- Good abrasion and strain resistance.
- High dimensional stability (Mechanically strong and stable over time)
- High surface brightness and excellent surface aspect.
Draft Analysis:
Draft Analysis is a tool in CATIA which identifies the zones which deviates from the specified values of angles along a defined draft direction using colour codes.
It highlights the regions of draft using colours. Draft analysis is the first step performed after receiving the Class A of the component.
Class- A Surface:
*In automotive design, a class A surface is any of a set of freeform surfaces of high efficiency and quality. It is the visible aesthetic surface of any automotive component
*the class A as the input of the plastic desiner .
Class- B Surface:
*Class B surfaces are Engineering Surfaces which are invisible to the eyes or often on the back side of the Class A surfaces. It is mainly the thickness of the component or Class A.
These surfaces need to be designed as per the Class A surface
* These surfaces include the main engineering features such as Screw bosses, Ribs, Snaps, Stiffeners and fixations. B surfaces also do not contain any aesthetic styling content and textures since it is not visible to eyes.
Class- C Surface:
*Class C surfaces are connectors between Class A and B surfaces. This surface connects both A and B surfaces along the Tooling Axis.
It contains the draft as per the design. Its is basically the thickened surface between both A and B surface.
Draft analysis of solid component :
* draft analysis has done in the closed body of the base bracket the result as shown.
Conclusion:
The Design of Plastic Component - Base Bracket from Class A is completed using concepts of Draft angle, Draft Analysis, Tooling Axis, Class B and Class C creation and converting Closed surface to a solid part.