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 performing the draft analysis on the model.

OBJECTIVE:

1. To ensure proper tree structure is followed.
2. Geometrical sets should have a proper name based on the sketches present inside of them.
3. All the sketches should be created under the geometrical set.
4. To publish the tooling axis and class-A surface.

PROCEDURE:

TOOLING AXIS:

First import the given Class A surface model i.e., fan cover in CATIA V5.

After importing the model, check for the boundaries.

To create a tooling axis clearing x-direction first, create an axis system at the center point (reference point).

Now using the intersect option, select the ZX plane of the Axis system as the first element and fan cover (Class A surface) as the second element. This will give a 2D sketch of fan cover viewing from X-direction.

Now create lines representing the walls of a fan cover using point to point option with the help of intersecting 1 as shown below figure.

Using these 2 lines, create the tooling axis clearing X direction. Create a line that bisects these two lines from the reference point in the Z direction. This will form a tooling axis X.

Similarly using the intersect option, select the YZ plane of the Axis system and follow similar steps to form a tooling axis clearing Y- direction.

Once these two axis are formed, create a line in Z-direction bisecting these two lines which will give us a final tooling axis for the fan cover model

DRAFT ANALYSIS:

To perform Draft Analysis on the model. Go to menu bar > select insert > Analysis > Feature Draft Analysis

To give the draft direction, use the compass and align Z-axis of it with the tooling axis which we created for the model. Once it is properly aligned, lock the draft direction. A red color point will be shown on screen, select the fan cover (CLASS A SURFACE) and it will show us the current draft angle of the model. Set the draft value to 3 degree under the color scale variant and press

Using the Analysis option under Display Tab we can perform the draft analysis on the given model

To publish the Tooling Axis and Class A surface (Fan cover) first select it and then Go to menu bar > Tools Publication. This will publish the Tooling Axis and Class A surface which can be seen in the Tree structure

PHRASES USED:

DRAFT

Drafts are defined on molded parts to make them easier to remove from molds

The characteristic elements are

Pulling direction: This direction corresponds to the reference from which the draft faces are defined

Draft angle: This is the angle that the draft faces make with the pulling direction, this angle may be defined for each face.

Parting element: This plane face or surface cuts the part in two and each portion is drafted according to its previously defined direction

Neutral element: This element defines a neutral curve on which the drafted face will lie. This element will remain the same during the draft. The neutral element and parting element may be the same element

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

TOOLING AXIS

The Definition tab on the Tool As dialog controls how you want the tool to orient itself whilst cutting a multi-axis toolpath Total as-Select to define the tool orientation. The default value is Vertical which is used for standard 3-axis machining How can be a fund larger continuously changing orientation.

FINAL MODEL

Front View:

Side View:

Top View:

Isometric View:

Tree Structure:

RESULT:

The tooling axis for the given fan cover model is successfully created and draft analysis has also been performed for the same.