Week 9 - Attachment Feature Creation - Challenge 2

Aim:Create the boss and Dog House for the Centre console coin holder considering the design rules.

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.
• Inorder to clear the inner sides of the Dog House we need another tooling Axis which will be perpendicular to the main tooling Axis.

Sketches:

Screw boss:

• 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

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 at the edges is 0.25radius. Union trim Boss and Ribs.

Sketch of Rib to support Screw boss. Create four ribs.

Sketch of 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.

Draft Analysis of Screw Boss and Dog House

• 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.
• 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.
• 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.

Orientation views:

Tree Structure and Publication:

CONCLUSION:

• Screw Boss is created with Ribs support.
• Dog House is created.
• All guidelines are followed while giving the thickness, height, fillets and Drafts.
• Draft Analysis have been done and the Attachment features are clearing the tooling axis and side core axis.