Week 10 - Challenge 2- Attachment Feature Creation (Dog House)

REPORT:

AIM:

• Create the Door trim.
• Create a Dog House for the Door Trim considering the design rules.

Commands Used:

• Point,Line,Extract,Split,Trim,Extrapolate,Offset,Edge fillet,Boundary,Sweep,Join,Multi section surface,Close Surface,Extrude,Plane,Circle,Intersection,Spline.

Procedure:

Class-A Surface:

• This is the given Class-A Surface of a Door Trim.

Tooling Axis:

• To create a tooling axis, a point is plotted on the curve of the Door Trim.Using point-direction method a line is created in the Y-direction.This line is Known as Tooling Axis

Draft Analysis:

• Draft Analysis is performed on the class-A surface(Draft Angle=3°).

Class-B Surface:

• To Create class-B surface, directly offset the class-A surface upto 2.5mm.

• As the class-A surface is directly offseted, some of the patches are missing on the offseted surface.

 

• The missing patch is created using Multiple Extract,then extrapolated and trim the unwanted surface.
• Give the fillet for sharp edges(Trim Surface).
• Join the trim surface and the offsetted surface to form class-B surface.

Class-C Surface:

• Class-C surface is created using boundary,sweep,extrapolate operations on the class-A surface.
• Then trim the unwanted surfaces to create class-C surface.

Join Class-A surface & Class-C surface:

Final Trim:

• Unhide the class-A & class-C join and class-B surface.Then trim the unwanted surfaces to form Door Trim plastic component.

Close Surface:

• Using close surface,a solid model of the Door Trim is created from the plastic comonent.

Draft Analysis:

• Draft Analysis is performed on the Solid Model(Draft Angle=3°).

Dog House Creation:

• Dog House is designed according to the principles in the below figure.
• Thickness,T=3mm.

C	40%</math>">40% of T or ≤</math>">≤ T
B	3 - 6 mm(Taken as 4mm)
Width	≥12</math>">≥12 mm(Taken as 15mm)
Width to Height Ratio	3:1(Preferred 2:1)
Draft	1.5o</math>">1.5°

Draft Analysis:

• Draft Analysis is performed on the Dog House using main tooling axis(Draft Angle=1.5°).

• Draft Analysis is performed on the Dog House using side core tooling axis(Draft Angle=0.5°).

Final Solid Model:

• Now the dog house is attached to the door trim using union trim operation.

Isometric View:

Front View:

Top View:

Left Side View:

Right Side View:

Draft Analysis:

• Draft Analysis is performed on the final solid model with dog house.

Tree Structure:

Conclusion:

• Tooling Axis & Solid Model of the Door Trim is created.
• Dog House are created on the B-surface of the Door Trim.
• Draft Analysis is performed on the class-A surface,solid model,dog house and Final solid model with dog house.