Challenge

Week 9 - Attachment Feature Creation (Ribs & Screw Boss) - Challenge 1

RRajesha Dn8 Jan 2023

Challenge-27 Attachment Feature Creation (Ribs & Screw Boss)

Aim:

To create the Door Handle component from the iven Class-A surface.
To Create the tooling Axis for the given Class-A surface meeting the requirements of the draft angle.
To attach B side features in the component.
To perform the Draft analysis on the model.

Description:

Creating Tooling Axis:

The Tooling Dirction is basically the direction that the mold pulls a part the mold is built in two separate pieces, basically. You have the core side. The core pulls a part from the cavity and that's the Dye line or the Tooling Direction.

Open the given CATIA part file.

Check for gaps between surfaces for that click on join and then preview.
If thees only gap between the surfaces join them with a maximum tolerance of 0.003mm.

Extract the boundary and dissemble the boundary.
Find the correct tooling axis where the material don't interfere with the tooling axis and all the elements can be created.
Create an axis system using at the centre of the Door Handle.

Intersect the YZ plane with respect to the Class-A surface.
Hide the class-A surface and create point to pont line on the suspected drafts.
Create bisecting line with the two lines and point to create a tooling axis.
Bisecting Lines were used to get the exact medium from the two sides so that maximum positive draft angle can be acheived.

The Tooling A xis created for the component by bisecting two axis from X an Y planes.

2. Draf Analysis:

The Draft Analysis command enables youto detect it 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.

Before going to draft analysis go to draft analysis go to costomized view parameter > under mesh > check material and then click ok.
Now for draft analysis go to insert > analysis > feature draft analysis.
Use the compass to define the draft direction.
In th colour scale change the draft angle to 3 degree.
The component changes to green in indication of passing draft angle.
Use running point to check the angle on the component.

The draft analysis is complete.

3. Creating Class B surface:

Extract the surfaces from the class A using multiple exytract and untrim them.
Use Extrapolate to make sure that all the untrims are properly intersected to trim and offset the surfaces to 2.5mm to create the thickness.
Trim the extra surfaces using trim command.
Insert them into new geometrical set and name it with respective part names.
Apply fillets to the model after creating the entire surface.
If the edges are outside the fillet value will be added to the thickness of the component and if the edges are inside, the filllet value value will be substracted from the thickness of the component , forinstance the thickness of the component is 2.5 mm the fillet value is 15 mm so the outside portion value should be 17.5mm and inner edges should be filleted 12.5mm to get uniform thickness.
Perform trims one at a time so that it will be clear to understand.

4.Creating Class C surface:

Extract the boundary fromthe class A surface using boundary command.
Using disassemble tool to divide the boundary as the boundary contains domains.
Use sweep command > choose profile type line> subtype as with draft direction> choose guide curve and draft dirction > draft angle as 3 degree > preview.