Week 8 - Challenge 4 - Bumper

AIM:

• To make the model from the provided input class-A surface.

INTRODUCTION:

• To create the model using the reference of Class-A surface.
• The class -B surfaces are created by the extraction of class-A surfaces.
• The class-C surfaces are created by extracting the outer boundary of the class-A surface and applying the swept feature

METHODOLOGY:

• In this model we have to consider the following things:

1. Tooling axis
2. Draft analysis
3. Class-A surface
4. Class- B surface
5. Class-C surface
6. Making a solid model from the surface.

TOOLING AXIS:

• Tooling axis is the defined axis to perform the manufacturing process within the injection molding according to its direction.

CREATION OF TOOLING AXIS:

• First of all analyze the given input surface to see which direction is suitable for creating the tooling axis.
• In this model we have to create the tooling axis between the grill area of the bumper.
• Create a point between the grill area using point sketch tools with the point type of between option in the middle.
• Create a line by using the point-direction line type option with reference of z direction.
• Final sketched line is called as tooling axis.

DRAFT ANALYSIS:

• The analysis of the model should maintain the nominal 3-degree draft angle to the tooling axis.
• Draft should be given to the plastic component to reduce the wear and tear and improve the production quality and accuracy while ejecting the part from the mold cavity.

How to perform the draft analysis

1. Go to insert < analysis< feature draft analysis.

2. Align the tooling axis with a compass.

3. Click on the surface to see whether it is in permissible limit draft values or not.

4. The entire surface should be green in color.

DRAFT ANALYSIS FOR CLASS A SURFACE:

DRAFT ANALYSIS FOR FINAL MODEL:

CLASS- A SURFACE:

• Class-A surface is given as an input surface by designers.
• Generally the class-A surfaces have the tangent continuity
• Class-A surface is the outermost aesthetic surface.

CLASS B SURFACE :

• Class B surface is an engineering surface.
• The engineering features of ribs, screw boss, and dog house are designed on the class B surface.
• Class B surface is created by the offset of class A surface.

CLASS C SURFACE:

• Class C surface is the closing surface of class A and class B surfaces.
• It is the extraction of the boundary of class A surface.
• Apply the sweep feature to create the class c surface, For guide reference click the extracted boundary and for the drafting reference option click the tooling axis and give a 3-degree draft angle.

FINAL COMPONENT IMAGES:

SOLID BODY IMAGES OF FINAL BUMPER COMPONENT:

EXPANDED TREE: