Week 10 - Challenge 1- Attachment Feature Creation (Ribs & Screw Boss)

Attachment Feature Creation (Ribs & Screw Boss):-

AIM :- To Create the Screw boss for the Drill Handle considering the design rules.

OBJECTIVE:-

• Create a Tooling axis for the given CLASS -A surface.
• Create the CLASS B and C surfaces of drill handle using the given CLASS-A surface.
• Create a final surface model and convert it into a solid body using the close surface command in the part design workbench.
• Create Ribs & Screw Boss on the B surface by considering the design rules.
• Perform draft analysis for both Class-A surface and Final part body.

Procedure for Tooling axis creation :-

• Check the best possible tooling direction by manually adjusting the compass.
• By analysing it is found tha the t y axis as tooling direction would clear most of the faces without any difficulties.
• Now extract any surface and create a mid-point on it.
• Then create a dummy axis creating a line on the point and direction along the y-axis.
• Perform draft analysis to find whether the given axis clears the draft analysis.

Draft analysis of CLASS-A surface:-

CLASS-B surface creation

Class-B surface means the thickness of a part it is not visible and is inside part. In other words, the Class-B surface is a surface below a certain thickness from the class-A surface. This is the surface that contains engineering aspects of a model.

• Create offset surface of CLASS-A about 2.5mm inward direction.
• Check for discontinuity and rework on the offset surface using extract, multi-extract, multi sections surfaces.
• Join the surfaces and ensure the final CLASS-B surface created has no gaps.

CLASS-C surface creation

Creating the Final surface

• For creating the Finals door trim surface, join the CLASS-A and CLASS-C surfaces together.
• Then Extrapolate the B surfacea little bit outward direction to make sure that there would not be any gap when trimming with the joined surface.
• Then trim the extrapolated CLASS-B surface wthe ith Join surface (CLASS-A and CLASS-C)

Creation of Engineering features

• Rib

Rib provides an economical way to increase stiffness and strength to the mould parts without increasing the overall thickness of the wall. It is thin protrusion that extended perpendicular from the wall.

Design considersation of the Rib

• Screw Boss

Screw boss are used as a point for attachment and assembly, most common in as cylindrical projection with hole design to receive screw or other types of fastening hardware.

ISOMETRIC VIEW OF DRILL HANDLE :-

FRONT VIEW OF DRILL HANDLE:-

SIDE VIEW OF DRILL HANDLE:-

TOP VIEW OF DRILL HANDLE:-

Conclusion :

Hence the Rib for the drill handle considering the design rules for rib creation and Screw boss creation and Draft analysis is also performed for the final component is successfully done.