Week 9 - Attachment Feature Creation - Challenge 2

REPORT

AIM:

Create the screw boss and dog house for the center console coin holder considering the design rules mentioned in the vedio.

General rules for screw bosses:

1. Draft of 0.5 degree on walls of boss

2. Thickness is 40% of the nominal wall at the base.

3. Height to diameter ration-3.1

4. Fillet radius of max 0.25 mm.

Dog house design:

1.Extract the base of class A Surface and offset it with part thickness as 2.5 mm.

2. Draw sketch of rectangle and should be open from one side for dog house.

3. Using sweep with tooling diection and draft it at an angle of 1.5 degree for outer surface.

4. Close the upper surface by offsetting the below extracted surface and then after trimmed it.

5. Convert the dog house surface in thickened surface by applying part thickness as 2mm.

6. Now for the inside faces of dog house we need side core tooling axis created it in z direction.

7. Give draft to the inside surface of 0.5 degrees.

8. Now to create the C and B section as shown in design rules, offset the base surface in between 3 to 6mm.

9. Extrapolate the surface to achieve desired length.

10. Switch to part workbench and split the C and B section with thicken part.

11. Again, provide draft to inside surface.

12. 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 0.5mm.

13. Assemble with coin holder main body.

Draft analysis of dog house:

FOR SIDE CORE TOOLING AXIS:

FOR TOOLING AXIS:

SCREW BOSS DESIGN:

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

2. 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.

3. Pad it with main tooling direction considering height to dia ratio of 3:1 and give draft with tooling axis

4. Now to support the screw boss we need to give ribs for it.

5. Draft to ribs of 0.5 degree.

6. Do union trim with screw boss.

7. Assemble to coin holder main body.

SCREW BOSS DRAFT ANALYSIS:

FINAL BODY ANALYSIS:

FEATURE TREE :