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

AIM

To create a tooling axis for a fan cover model which satisfy all the rules of draft angle anf perfome the draft analysis on the model.

OBJETIVE

1. Ensure proper tree structure.
2. Proper names for every geometrical set according to sketchs they represent.
3. Every sketches should be under geometrical set only.
4. Publication of thee tooling axis and the class-A surface.

OPERATIONS INVOLVED

DRAFT-Draft is the amount of taper for molded or cast parts perpendicular to the parting line.

PULLING DIRECTION- The direction part is part ejected from the mold is called pullin direction.This direction also corresponds to the reference from which the draft faces are defined

DRAFT ANGLE-A draft angle is that applied to each side of the most features of an injection molded part.The angle,which is positioned to run toward the direction of a mold's pull and parting line, helps with releasing the part fromthe mold.

NEYTRAL ELEMENT-It is the neutral curve on which the drafted angle will ile,it will remain unchanged during the draft.Neutral and parting elements may be the same in some cases.

DRAFT ANALYSIS-Draft analysis command wnables you to detect if the part you drafted will be easily removes.This type of analysis is bperformed based on color ranges identifying onees on the analyzed element where the deivation from the draft direction at any point corresponds to specified values.

TOOLING AXIS-The definition tab on the tool as dialog controls how you wanty the tool to orient itself whilst cutting amulti-axis toolpath total as select to define the tool orientation.The default value is vertical which is used for standard 3-Axis machining an be fund larger continuously changing orientation.

TOOLING AXIS

Step-1:

To import the given class-A surface model in this case fan cover model in CATIA V5

Step-2

Test the boundries in the model.

Step-3

To create tooling axis first create a dummy axis in the Z-direction by creating a center point using hole as reference in the point tool.

In order to create a tooling axis clearing the direction first which needs to create a Axis system at the center point.

Step-4

Now using the intersect option on the toolbar,select the ZX plane of the axis system as the first element and fan cover or class-A surface as the secont element. this will give A 2D sketch of fan cover viewing from X-direction

Step-5

Create a dummy axis as shown in the below

Step-6

Now create lines representing the walls of the fan cover using point to point in the line command

Step-7

using the 2 lines,create a tooling axis clearing the x-direction.create a line that bisects these two lines froim the reference point in the Z-direction.this will create a tooling axis clearingh x-direction.

Step-8

Again using intersect option select YZ plane in the Axis system which will give outer lines of the model in the Y-direction

Step-9

Same as before create two lines from the points on the side lines of the sketch using point to point in line command

Step-10

Similarly create a tooling axis clearing y-drection using same bisecting method as before

step-11

now create the final tooling axis in the Z-direction for class-A surface using bisecting taking both X and Y direction clearing axis as reference in the line command

Step-12

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.Once it properly aligned,lock the draft direction.A red point show in trhe screen, select class-a surface and it will show us the current of the model.Then go to display tab on draft analysis and select the first option under it colour scale and it will show the draft valkue.set the draft value to 3 deg under the colour scale variant and press ok.

Using Analysis option under Dipalt tab we can perform the draft analysis on the given model.

Step-13

To publist the tooling Axis and the Class-A surface first select it and the go bto menu bar > Tools publication.This will publish the tooling Axis and Class A surface which can be seen in the tree structure.

FINAL MODEL VIEWS

TREE STRUCTURE