Week 9 - Challenge 1 - Base Bracket Design

Objective: Create the Base Bracket Plastic component through the given Class-A surface.

Given Class A Surface

PROCEDURE:

A) TOOLING AXIS CREATION:

• Create a point on class A surface with the aim to move the main tool for component creation .
• Mask an axis over the point created with the same directions as the main axis .
• Using Intersect command from Generative Shape design select the YZ plane as the first element and the class A surface as the second element .
• After creating the intersecting lines select the Line command and join the vertices which show the most possible +ve draft angle manufacturable

.

• After creating these two lines use the bisect option from the line command.

• The tooling axis for manufacturing the part is created.

Tree Structure for Tooling Axis

B) Draft Analysis of Class A Surface:

• After Tooling Axis Select the Feature Draft Analysis option from the Insert > Analysis > Feature Draft Analysis Option.

• Select the element to analyze.
• Next click on Use the compass to define the new current draft direction option and make it align with the tooling axis by dragging it to the axis

• Next use the lock option to lock the compass to the tooling Axis.

• If the color appears blue just click the invert option on the right side of the draft direction axis button

Tree Structure For Draft Analysis

C ) Creating Class B Surface Creation:

• Using the Extract option select the first set of ribs from the Class A surface.

• use extract similarly for other irb, middle plate, base.

• then use untrim option to remove trims and get original shape.

• Then use the extrapolate option to get rid of any gaps between the intersectios.

• then give offsets of 2.5 mm for desired thickness.

• then use the trim option to get the required shape.

• after this use the fillet option to give the fillets as class A. As we are giving offset we have to give radius+thickknees for fillet input.

D ) Class C Surface Creation:

• Use the boundary command to get the edge of the class A.

• use the sweep command and give the boundary, tooling axis and draft angle as input to get the Class C Surface.

• Use the join command to join the class C & Class A Surfaces.

E ) Final Creation:

• Use the Joined Surface & Class B Surface and make a trim.

F ) Closed Surface:

• Go to Part > Body > Closed Surface command and we have a final solid part.

Tree Structure For Class b & C creation:

Draft Analysis For Class A Surface

Draft Analysis For Final Closed Surface

Views

Isometric

Fornt

Side

Top

Conclusion : Created the plastic component in Catia V5 using the given Class A Surface.

1. Created the tooling axis.
2. Ceated the Class B Surface
3. Created the Class C Surface
4. Created the Closed Surface from Surface geometry.
5. Did the Draft Analysis