Week 9 - Attachment Feature Creation - Challenge 2

AIM- Create the screw boss and dog house for the centre console coin holder considering the design rules mentioned in the video.

General Rules for Screw bosses.

• Draft of 0.5 degree on walls of boss
• Thickness is 40% of the nominal wall at the base.
• Height to diameter ration-3:1
• Fillet radius of max 0.25 mm.

C is where the doghouse contacts the back side of the surface

Doghouse wall thickness at the intersection of the part wall (C ) should be 40% or less than the main wall stock (T).

Height of (B) should be between 3-6 mm

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.

extracting and offsetting the class a surface

Give draft to the inside surface of 0.5 degree.

Now to create the C and B section as shown in design rules by thickenning the surface

extracting and splitting 

 

Assemble with coin holder main body.

 

draft analysis

Screw boss design

Screw boss can be on B surface or it can be on dog house in this we are mounting it on dog house.

Draw circular sketch inside circle of dia 5mm and for outer circle wall should be 0.6*T on one side so outside dia = 2*(0.6*2.5)+5(inside dia)=8mm.

for ribs

After that giving draft to the bose and ribs

Union trim both 

Now assembling the screwbose to the the main body

Making a copy of the screwbose wit paste special, then translating to place it above the dog house

draft analysis