Week 9 - Attachment Feature Creation - Challenge 2

Aim: Create a create screw boss and dog house for the given center console coin holder.

Procedure:

• Referring to the above challenge CATPART we are creating the Screw boss and the dog house on the rib side surface.

• To create the Screw Boss, sketch on the extracted base surface with a diameter of 5mm. For screw boss the thickness

  should be 0.6 times the thickness of the main component.

• Make it Pad by the height/diameter ratio of 3:1 ratio.

• Draft the outer and inner walls of the pad at 0.5 degrees.

• To stiffen the screw boss add the ribs on 4 sides by sketching on the extracted base surface and Pad it to a height not

  more than the rib height. Draft the walls of the ribs at 0.5 degrees.

• Now add the screw boss and ribs to the main component and Unitrim the ribs which are inside the screw boss.

• Fillet the edges of walls with the radii of 0.25mm.

• Create a sketch on the extracted base surface where the dimensions should be more than the screw boss.

• As for the Dog house, one of the sides should be opened, making one side a construction line.

• Extrude the sketch by using the Sweep option with 1.5 degrees to the height of 20mm towards the top and 1mm towards the bottom.

• To cover the top surface, offset the extracted base surface to a distance of 20mm and then trim it and fillet the edges with 1mm. Pad

  the extruded surface to the outside with a thickness of 2mm. Create the tooling axis.

• Cut the uneven surface at the open side by extracting the opposite surface and offset it to a distance toward the open surface

  and split the part in Part design by using the Split option.

• Draft the inner walls at 0.5 degrees. Now create the backside contact surface by offsetting the extracted base surface to a distance

  between 3 - 6mm height (B) and Sweep the surface to a distance of 40% of the main wall thickness(C) and Trim the surface.

• Split the offset Surface with the body to get the cut on the backside of Dog House. Draft the Split area with 0.5degrees and fillet

  the surface with the radii of 1mm and then translate the Screw Boss to the top of the Dog House and Add it to the Dog House and Add

  then component to the Main component. Do the Draft Analysis on the final component in both toolings axis.

Images:

Dog house:

Screw Boss:

Isometric view:

Draft analysis for screw boss and dog house:

Tree: