Week 9 - Attachment Feature Creation - Challenge 2

BOSS AND DOG HOUSE FOR THE CENTRE CONSOLE COIN HOLDER

PROCEDURE:

TOOLING AXIS CREATION:

• Check for the suitable tooling direction. Usually, a perpendicular axis to large flat surface or hole is considered as a tooling axis.
• Extract base and create a line with point, perpendicular to the base surface.

SKETCHES:

• Sketch for Screw boss. M6 screw is considered for dimensions.
• Inner circle diameter is 5.2mm.
• The Wall thickness(W) of the Boss must be 0.6 times the component wall thickness.
• W = 0.6*2.5 => 1.5mm
• The Outer circle diameter will be 5.2+(2*1.5) => 8.2mm

• Sketch for Rib to support Screw boss. Create four ribs.

• Sketch for Dog house.
• The minimum width of dog house must be 12mm. In below figure the width of dog house is 24, which is enough for screw boss and ribs.

SCREW BOSS

• Pad the sketch for 12mm, satisfying the hight guideline(Hight to Diameter ratio must be less than 3:1).
• Hight, H <= D*3 = 5.2*3 => 15.6mm.
• Give Draft of 0.5 degree.

RIBS

• Pad rib sketch with thickness satifying the guidelines.
• Rib thickness at base, t = 0.4*wall thickness, t = 0.4*2.5 => 1mm
• Rib hight must be within (3*T to 5*T), which is 7.5 to 12.5mm. And rib hight must be less than screw boss.
• So take 10mm as rib hight, which is less than screw boss height(12mm).
• Give draft of 0.5 degrees.

• Fillet the edges with 0.25radius. Union trim Boss and Ribs.

Draft Analysis of Screw Boss

• Pick compass and place it on tooling axis. The walls have draft of 0.5 degrees.
• The screw boss is clearing tooling axis. Inside wall is not drafted as sleeve ejection will be used.

Dog House

Draft Analysis of Dog House

• Pick compass and place it on tooling axis. The walls have draft of 1.5 degrees.
• The Dog House outside walls are clearing tooling axis.

Dog House Orientation views

Draft Analysis of Dog House

• Pick compass and place it on Side core tooling axis. The walls have draft of 0.5 degrees.
• The Dog House inside walls are clearing Side core tooling axis.

Dog House Orientation views

FINAL COMPONENT

• Assemble Dog house and Screw boss onto the Coin Holder.

DRAFT ANALYSIS OF FINAL COMPONENT

• Along main tooling direction.

• Draft Analysis along Side core tooling axis.

TREE STRUCTURE:

CONCLUSION:

• Screw Boss is created with Rib supports.
• Dog House is created.
• All Guidelines are followed while giving thickness, height, fillets and Drafts.
• Screw Boss and Dog Boss is Assembled onto the Coin Holder.
• Draft Analysis have been done and the Attachment features are clearing the tooling axis.