Challenge

Screw Boss and Dog House Feature Creation

OBJECTIVE:

Creating the boss and Dog House for the Centre console coin holder considering the design rule

THEORY:

SCREW BOSS:

Used in many part designs as points for attachments and assembly
the most common variety is of cylindrical projections with holes designed to receive screws fastening hardware
Bosses that merge into sidewalls should be avoided

DESIGN RULES FOR SCREW BOSS:

DOG HOUSES:

Helps to avoid sink marks
solves the length issues(ex: screw bosses can be formed at 100mm form B-surface)
always design houses perpendicular to the tooling axis

DOG HOUSE DESIGN CONSIDERATIONS:

"C" is where the doghouse contacts the backside of the surface
Doghouse wall thickness at the intersection of the part wall ( C ) should be 40% or less than the main wall stock ( T ).
Height of ( B ) should be between 3.0 – 6.0 mm

PROCEDURE:

SCREW BOSS:
- Extract the surface on which you want to add boss
- create a sketch of the boss
- create a new part body
- create Pad
- Draft the obtained body, Neutral element should be the extracted surface
- Give required fillets
- Create ribs for support in a separate part body
- union trim with the main body

DOG HOUSE:
- Extract the surface on which you want to create a dog house
- create a sketch of the dog house
- Extrude or sweep and give draft
- close the upper open surface
- make the solid body by using thickness feature in a separate part body
- create side core axis which is used for the drafting of inner surfaces of the dog house
- Give required fillets

DRAFT ANALYSIS OF SCREW BOSS AND DOG HOUSE:

Ship work like this
in your own course.