Week 9 - Attachment Feature Creation - Challenge 2

PART 1-: Creating Screw Boss and Doghouse design

• Screw boss design-:

1. Isometric view

2. Front view

3. Side View

4. Top View.

Design Report-:

1. Outside Diameter of boss: It is equal to 2.0 to 4.0 times the outside dia of screw or insert.
2. Draft: Inside and outside surface draft should be greater than or equal to 0.5 degree.
3. Fillet radius: It should be maximum of 0.25mm.
4. Height to diameter ratio: It must be of 3:1 ratio.

• Doghouse Design:

Sketch

1. Isometric View

2. Front view

3. Side View

4. Top View

Design Report:

1. Doghouse wall thickness: It should be 40% or less than the main wall thickness.
2. Draft: The minimum draft for a doghouse is 1.5 degrees.
3. Width: The minimum width for a doghouse is 12mm.
4. Height: It should be between 3 to 6mm.
5. Width to height ratio: 3:1 ratio is considered.

PART 2: Draft Analysis

Tooling axis:

Side core axis:

• Draft analysis of screw boss

1. Isometric view

2. Front View.

3. Side View.

4. Top View.

2) Draft analysis of Doghouse.

• Along the tooling axis

1. Isometric view.

2. Front View.

3. Side View.

4. Top View.

• Along the side core axis.

1. Isometric view

2. Front View.

3. Side View.

4. Top View.

Draft analysis report:

• The green color represents angle of surface with respect to tooling axis being greater than 3 degrees.
• The blue color represents angle between 0 and 2 degrees.
• The red color represents angle lesser than 0 degrees. It represents erroneous draft angle that needs to be corrected.

Complete Screw boss and Doghouse assembly on a coin holder:

Screenshots fo expanded Feature tree structure-: