Week 9 - Attachment Feature Creation - Challenge 2
AIM:
To Create the boss and Dog House for the Centre console coin holder considering the design rules.
Tooling axis creation:
To create the tooling axis the we require line which is perpendicular to the class A surface . for that line we required point, which is extracted from the base surface of class A surface.
After extraction of the base the point is created on the surface using point on surface.(In point definition dialog box)
from line definition dialog box line is drawn using point-direction option.
this tooling axis is created from the intersection between the yz plane and class A surface.that axis is then published using publication.
Side Core Tooling axis:
To create side core tooling axis the line is drawn with point- direction line type in Line-definition dialog box.
In Line direction dialog box the line is given along Z-axis. the apporpriate line are drawn for the side core tooling axis.
screw boss creation:
sketches for screw boss:
screw boss dimension are dimensioned using screw boss design rules. The inner hole in the screw boss are dimensioned as 5.2 mm because we have taken the M6 Screw for reference and the outer circle is 60% of the actual hickness.
then,the inner and outer circle becomes-1.Inner=5.2 dia 2.Outer= 8.2 dia
sketch for screw boss ribs:
The screw boss sketches are drawn and constrained using sketch solving status as Iso-constrained. Then,The Iso-constrained sketches are created as solid body using pad function in a separate body.
In the pad definition dialog box,the length is given as 12 mm. which is height of the screw boss.after the pad function is given the fillets are given at the edges are boss.
before the fillet certain draft angle are given to the screw boss. according to the design rulers the 0.5 deg is the draft value recommended by design rules.so the boss is drafted with 0.5 deg of draft.
after giving the draft the respective fillets are given to the screw boss.
screw boss sketches are taken into consideration again for creating the ribs for the screw boss.
Again the pad function are given to the ribs of the screw boss with thick option .thickness 1=0.5 and thickness 2=0.5. equally distributed by giving neutral fiber.
after screw bosses are created. the respective intersection between the yz plane and body part is created.
this is the intersection between the body and yz plane.where it shows that the intersecting line is covering the screw boss and ribsalong the line.
General Guidelines for Bosses:
- Draft - 0.5 degrees on walls of boss
- Thickness - Typically 40%* of the nominal wall at the base.
- Height to Diameter Ratio - 3:1
- Radii - 0.25mm maximum radii.
these guidelines are followed and used as design rulers in the above boss creation.
The respective edge fillets are given to the above part.
Dog House creation:
from the created screw boss, a translate copy is made and moved with certain coordinates. then with that coordinate we created a point that used for sketching the dog house sketching.
skecthing of the dog house:
The dog house sketches are drawn and constrained using sketch solving status as Iso-constrained. Then,The Iso-constrained sketches are created as surface using sweep option.
the below surface is offseted and trimmed to form the top surface for the dog house.
after the trrim operation the backside of the sweep is extracted and extrapolated.
the extracted and extrapolated surface is offseted and trimmed with thick surface.
the extrapolated surface is trimmed with the thick body .
after trimming the respective draft bangle is given to the inside of the dog house.
draft angle of 0.5 deg respect to design rulers.
edge fillets are given to the dog house.
from the dog house sweep we extracted that surface and offseted with the measurement of 1mm.
then the extrapolated surface is trimmed to form the c section in the design rule of the dog house.
the respective edge fillets are given to the part and trimmed with dog house thick surface.
after the triming operation is done the respective dog house body is created.screw boss is foitted and translated.
draft analysis on dog house:
dog house along the main tooling axis.
drafting along the inside of the dog house using side cor tooling axis.
- green which is above 1.45 deg
- blue which is 0 deg
- red which is below 0 deg.
tree structure :
publication:
