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

AIM:

To create the tooling axis and perform the draft analysis for the fan cover.

Procedure :

• To create the tooling axis, we need the proper orientation or view that gives the correct features and draft available in the component.
• So here the component view from the Z direction gives the proper view for the tool to see the features present in the geometry.

• To create the tooling axis from the Z direction we need the tooling axis from the other two i.e X and Y direction.
• The tooling axis created from the X direction and Y direction have their own tooling lines that are created using the features or draft angle boundary lines.\
• First, the axis system is created at the hole where the tooling system is going to lie.

1. The boundary of the circle is extracted.
2. Then the center point is created using the point > circle/curve/sphere.
3. At the point created the axis system is created but it doesn’t have to be current.

• After that switching the view of the model to the Y direction and creating the tooling axis for Y.

Using the intersect in ZX plane to get the boundary lines.

Then the lines are created along the slant surfaces.

Then these two lines are bisected to get the tooling axis for the Y.

The same can be done for the X plane view also.

• Then to obtain the final tooling axis, the lines from the X and Y direction are bisected to obtain the Z direction tooling axis and this tooling axis will be used to measure or analyze the draft.

Fig- Tooling axis for Z direction (final )

Draft analysis :

• To perform the draft analysis the view parameters are first set to material mode.

• Then go to Insert >>analysis>>feature draft analysis.

• First, select the axis system and drag the axis system to align and coincide with the tooling axis and lock the orientation. This axis system defines the draft direction according to the tooling axis.

• Switch on the color scale and set the minimum draft value. Here it is set to 3 degrees and it will be displayed in green color. Any draft angle below 3 degrees will be shown in red color.
• Now select the running point tool to measure the draft angle at the various location and then if all surface passes the draft analysis switch on the light effect that will show the component in green color if the component has the required draft angle.

Results :

The fan cover passes the draft analysis with the minimum draft angle of 3 degrees.

Tree structure :