Challenge

Week 8 - Challenge 1 - Base Bracket Design

YYash Nagar14 Oct 2022

Automotive Plastic Design using CATIA V5

Aim: To Create the Base Bracket Plastic component through the given Class-A surface. To begin with, the tooling axis for the given Class-A Surface should be created meeting the requirements of the draft angle and at the end perform the Draft analysis on the model.

Procedure:

First import the surface or the CLASS A model to the CATIA V5.
As the plastic bracket is a surface model we have to open it in the GENERATIVE SHAPE DESIGN which is observed in START << SHAPES.
We have to check the Connectivity of the Class A surface which we have uploded.
Ensure that there are no gaps between the surfaces on the class a surface.
Now Identify the direction to create the tooling axis.
After identifing the direction we have to create a Dummy tooling axis by creating a line along z diection , point and plane.

Using the INTERSECTION command create the intersection along respective directions.

After creating the supporting lines,Create bisecting lines using the supporting lines.
The bisecting line which is created will be the TOOLING AXIS.
Finally the TOOLING axis is created and by using this we have to do the draft analysis on the surface.

draft analysis

To do the DRAFT ANALYSIS we need to go to INSERT analysis
In Feature Draft analysis we have to first use the COMPASS option and define the new current draft direction.
Set the DRAFT angle as 3DEG.
LOCK the direction and analize the Draft under the running point on the surface .
To ensure the draft is perfect just switch to quick analysis mood.
Finally the draft analysis on the Plastic Base Bracket is done.

build class B surface

Now we have to Apply the thickness for the bracket or class A surface.
For that first we gave to create a B surface in a new geometrical set .
Observe the class A surface and find the the main surface apart frim the fillets. in our model we have 3 main surface those are the base surface, inclined surface and the ribs.
Lets work on ribs first,
Create a new geometrical set and name it as Rib 1 and Rib 2.
Then extrace the surface from class A surface then un trim the ectracted surfaces , after un triming extrapol the surface and then trim the extra surface by comparing with class A surface
And finally off set the surface with the thickness of the model.
Now, we get the total surface by appling the fillets we get the B SURFACE fo the model ( be care ful when appling the fillets measure the class A fillet radius and add the thickness to it to get the equal distance between the surfaces)
The B SURFACE is formrd after the fillets are given.

class C surface

Now, we have to create the C SURFACE, for that first we have to create a new geometrical set.
From Class A surface select the boundries , and then use the sweep command to create the C surface ( in sweep select the sweep as with draft direction)
We use the Tooling Axis which we have created earlier to create Class C surface.
Make sure you give the draft anglr and draft direction corretly.
Therefore, the C SURFACE is created.
DO the same for Holes.

merge class A and class C by given outward draft angle by class c surface

Now join the Class A and C Surface .
Now, we have to form a solid model from the surface model. For that we have to move to part body and choose a commed called close surface and select the surface
Finally we get the solid model of the base bracket .