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

DESIGN AND DRAFT ANALYSIS OF DRILL HANDLE

Class A surface

Draft analysis

Draft analysis is done to check plastic parts moldability for the ease of removal from the injection mold. A tooling direction is required to create the draft in the component, which acts as the drafting direction.

Tooling direction

• Considering the ejection from the cavity of the mould after manufacturing the interior trim must have the nominal 3-degree draft angle (minimum).
• Hence the tooling direction is created by considering the above factor and bisecting method is used.
• The base surface of the class-A was extracted and a point at the center is created and an axis system was inserted to the point.
• Then intersection of the Class A & xy plane is created and the two inclined lines were drawn. Then bisector line of the two inclined lines is created.

Tooling axis

Procedure for Draft Analysis

• The draft analysis tool is selected.
• Then by enabling compass the axis system is aligned in line with the tooling axis, to define the draft direction.
• Now the surface or part which should be subjected to draft analysis is selected.
• Lock Direction is applied that fixes the compass and then the mode dialog box is formed by snapping at any point on the part
• The Color Codes are classified and Draft Angles are applied
• Then the Running point analysis is used to hover around the part to analyze the permissible draft angles and the analysis is saved.
• This gives the result of the surfaces which have positive draft in green code.

Draft Analysis of Class A

Class B surface

Class C surface

Final part

Closed Solid body

Attachment features - Ribs & Screw boss

Draft Analysis of Door Drill Handle - For draft angle 0.5 deg

Feature Tree

Publication

CONCLUSION

The Class B & Class C surfaces and the Tooling Direction have been created and Published and the Drill Handle part body is developed along with Ribs and Screw bosses as attachment features. Both the Class A surface and the Solid body have been successfully passed the Draft Analysis.