Week 8 - Challenge 1 - Draft Analysis on a Fan Cover

AIM:

To Create the tooling axis for the given Fan cover model meeting the requirements of the draft angle and perform the Draft analysis on the model.

Tooling Axis:
Tooling axis is a direction which defines manufacturability of the part with lesser cost.

Draft Analysis:

The Draft Analysis command enables you to detect if the part you drafted will be easily removed. This type of analysis is performed based on color ranges identifying zones on the analyzed element where the deviation from the draft direction at any point, corresponds to specified values. Most applications require minimum draft angle of around 0.5^o to 1^o, however 3^o draft angles are widely accepted

To find Draft analysis option, Go to Insert > Analysis > Feature Draft Analysis.

Methodology:

Check the Surface

Check the connectivity of the given class A surface with options such as join, Boundary and dis-assemble surface.

Join

Check the connectivity using join command by selecting the surface as joining elements.

Boundary

Using Boundary command, check for connectivity of the surface by selecting surface edges

Dis-assemble

Dis-assemble the element by choosing ‘domain only’ as an option. After checking the connectivity of the given we can delete the curves we got as dis-assemble results and join surface from the geometrical sets.

Tooling Axis

As we know tooling axis is the direction that mold pulls apart, the tooling axis should be in a way that component completely clears from the mold and also have a very lesser cost of producing it.

• Create a new geometrical set, name it as TOOLING AXIS.
• Make a point by using circle, sphere and ellipse center as option and hole boundary as the circular reference.
• Create an axis system with that point.
• Intersect with ZX plane and create a dummy tooling axis.
• Draw lines with two points on the either side of the intersect.
• Draw a bisecting line with the above two lines and rename it as TOOLING CLEARING X DIRECTION.
• In similar way, Intersect with YZ plane and draw lines to create TOOLING CLEARING Y DIRECTION.
• By using tooling clearing X and Y directions, create a bisecting line and name it as TOOLING AXIS.
• Use Publication from Tools> Publications for tooling axis and class A surface for creating a reference to their geometrical entities.

TREE STRUCTURE

DRAFT ANALYSIS

• Change the view to ‘material mode’ in customize view option.
• To find Draft analysis option, Go to Insert > Analysis > Feature Draft Analysis.
• Select the mode of operation as quick analysis.
• Selection display option using color scale window.
• Use the compass for selecting the tooling axis in draft direction option and select the surface and lock them.
• If the color scale matches the color of the surface, then the component drafted can be easily removed.

Different views of the draft analysis:

Isometric view:

Front view:

Side view:

Top view:

Conclusion

Thus, the tooling axis for the given Fan cover model created and draft analysis on the model is performed and Green color on the surface after draft analysis indicates the draft angles are acceptable.