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

Aim :-The Objective of this Report is to create the Rib & Screw boss for the Drill Handle through a given input Class A Surface and Tooling axis to Draft Analysis on the A surface and final plastic component.

Objective :-

• Creating the tooling axis
• Draft analysis of Class A surface
• Creating Class B surface
• Creating Class C surface
• Surface and solid body
• Draft analysis of Solid body
• Engineering features Rib and Screw boss
• Draft analysis of Solid body with engineering feature

Tooling Axis :-

• Tooling axis represents the opening and closing of the mold core and cavity during the manufacturing of the components.
• A plastic product designer should consider the best tooling direction to cutdown the cost of the component very less.

Procedure for creating tooling axis :-

• First check the connectivity of the given Class A surface by using the Boundary or Join feature to visualized and repaired the open edges of the surface.
• And then, analyse visually the best suitable plane or surface for tooling axis.

Class-B Surface Creation :-

• Class-A surface means visible surface. It gives the aesthetic of the component which is created by the styling team and gives to the part design engineer to create the part with all engineering aspects.

Class-B Surface creation :-

• Class-B surface means thickness of a part it is not visible and is inside part. In other words, 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.

• Offset the class-A surface to 2.5mm inward direction.
• Rework on the patches and discontinuity of the offset surfaces using the features like extract, multi-extract, sweep, multi-section surfaces, extrapolate.
• To ensure the continuity of the Class-B surfaces check the boundary command to find out the boundary.

Class-C surface Creation :-

• Surface that joins class-A and class-B surfaces is class-C surface. Class C is often specified for interior surfaces not readily visible, surfaces that will be covered by another part when assembled.

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.

Design considersation of the Screw boss :-

Draft Analysis :-

• The Draft Analysis is a command enables you to detect if the part you drafted will be easily removed or Not.
• This type of analysis is performed based on colour ranges identifying zones on the analysed element where the deviation from the draft direction at any point, corresponds to specified values.
• In this project we analysis the draft angle of the Class A Surface And the plastic components with feature.

Draft analysis report for the given Class-A surface :-

• In the draft analysis of Class A surface of door handle, most of surface are green that means the surface has draft angle more than 2.9 degree and some surface has draft angle in between 3 to 1 degree which is shown in red color and there is not negative draft surface here.

Draft analysis report for the given final plastic component with rib and screw boss :-

• The draft analysis at draft angle 0.49degree with the tooling axis to the plastic componenets engineering feartures like Rib and Screw boss show green which means it clear during production process, but some surface of left side of Class-C surface has negative draft upto -0.73 degree which show in blue colour.

Tree Structure Of the Drill Handle Part :-

All the view of Cad File :-

Conclusion :-

• The report of “Drill Handle” with Attachment feature Creation (Ribs & Screw Boss) successfully completed as per the design rule.