Week 9 - Attachment Feature Creation - Challenge 2
DOG HOUSE DESIGN ON DOOR TRIM.
AIM- Create the Dog House for the Door Trim considering the design rules.
C is where the doghouse contacts the back side of the surface
Class A surface
Tooling direction
From the class A surface the walls of the handle are perpendicular so we can take the tooling drection as normal to the base surface
After defining the main tooling axis draft analysis for a postive draft of 3 deg
Draft analysis on class A
From the draft analysis we can check for the negative draft. As we can see there is no negative draft
Class B surface
Offset the class A surface by thickess which is 2.5 mm and correct the patches formed on the surface. Extropolate the class B surface
Class C surface
Extract the boundary of class A and sweep with referance to the surface at 90 deg with a length more than the thickness of the component. Join class A and sweep
Trim the Class C with class B to get closed surface and used closed surface to get solid body
Dog house design
"C" is where the doghouse contacts the backside of the surface
Doghouse wall thickness at the intersection of the part wall ( C ) should be 40% or less than thickness of component.
The height of ( B ) should be between 3.0 – 6.0 mm
By considering these the dog house is designed
Dog house design-
Extract the base of Class A Surface and offset it with part thickness as 2.5 mm.
Draw sketch of rectangle and should be open from one side for dog house.
Using sweep with tooling direction and draft it at an angle of 1.5 degree for outer surface.
Close the upper surface face by offsetting the below extracted surface and then after trimmed it.
Convert the dog house surface in thickened surface by applying part thicknes as 2 mm.
Now for the inside faces of dog house we need side core tooling axis created it in Z direction.
Give draft to the inside surface of 0.5 degree.
Now to create the C and B section as shown in design rules, offset the base surface in between 3 to 6 mm.
Extrapolate the surface to achieve desired length.
Switch to part workbench and split the C and B Section with thicken part.
Again, provide draft to the inside surface as shown.
Give radius/fillet to inside as 0.4*T=0.4*2.5=1mm and for outer edges give fillet as inside radius + part thickness.
And minimum fillet of 0.5 mm.
The tooling axis for side core is created and draft analyis is done on the dog house inside and out side
Part body in various orientations (Isometric, Front, Side, and Top View)
Isometric view
Front view
Side view
Top view
