Week 9 - Challenge 3 - Bumper

Aim:-

To create the Bumper plastic component from the given Class-A surface. Also to create the tooling axis by meeting the requirements of the draft angle and perform the Draft analysis on the model.

Fig.1: Bumper.

Tooling Axis:-

The direction with respect to the component in which the mould opens and closes is the tooling axis. Basically, it defines the direction in which the mould pulls apart.

Procedure to create the tooling axis:-

For this model,

• First, the given Class-A surface was observed carefully from every direction and found that in X-direction the Tooling Axis can be created.
  
  
  Fig.2: Given Class-A surface.
  
  
• Then, a point is created at one end of the edge of the middle part of the Class-A surface.
  
  
  Fig.3: Point on the edge.
  
  
• Then, a line was created passing through that point along X-Axis.
• Then, draft analysis was done for the Class-A surface considering the line as tooling direction.
• When no error was found in the draft analysis the line was named as Tooling Axis.
• Hence, the Tooling Axis was created.
  
  
  Fig.4: Tooling Axis.

Draft Analysis:-

The draft analysis is used to analyze whether our part model created in CAD is manufacturable based on the draft angle and the tooling direction provided. It also enables us to detect if the part will be easily removed from the mould or not. The ejection of the part from the mould depends on the draft angle.

Fig.5: Draft analysis of the given Class-A Surface.

Class-B Surface:-

Class-B Surface was created by offsetting the Class-A surface by 3 mm. Then the surface patches were solved by extracting, extrapolating and trimming the surface and at last edge fillets were applied considering the thickness of the component as 3 mm.

Fig.6: Class-B Surface.

Class-C Surface:-

Class-C Surface was created using the boundary of the class-A surface and sweeping it along the tooling direction and also perpendicular to the class-A surface as per requirement. Then the edges of the sweeps were extrapolated and trimmed with each other.

Fig.7: Class-C Surface.

Final Trim:-

The Final Trim of the Bumper was created by joining the Class-A and Class-C surfaces and trimming it with the Class-B Surface. At last, it was converted into the Solid Model by using the Close Surface command.

Fig.8: Joined Class-A, Class-B, and Class-C Surface.

Fig.9: Solid Model of Bumper.

Fig.10: Front View of the Bumper.

Fig.11: Side View of the Bumper.

Fig.12: Top View of the Bumper.

Fig.13: Tree Structure for the Geometrical Sets and the Part Body of the Model.

Fig.14: Draft analysis of the Solid Model.

Fig.15: Front view of the draft analysis of the Solid Model.

Fig.16: Side view of the draft analysis of the Solid Model.

Conclusion:-

The Bumper plastic component was created from the given Class-A surface. Also, the Tooling axis was created and perform the Draft analysis was performed on both Class-A Surface and the solid model.