Week 9 - Attachment Feature Creation (Ribs & Screw Boss) - Challenge 1

Attachment Feature Creation (Ribs & Screw Boss) in Door Handle

Tooling Axis creation:

It is defined as the direction in which the mould/core and cavity open. Selection of the direction of the tooling axis depends on the ease at which components can be easily ejected.

Class A Surface:

• Check for gaps between surfaces for that click on join and then preview.
• If theres any gap between the surfaces join them with a maximum tolerance of 0.003 mm.
• Intersect the yz plane with respect to the class A surface.
• Hide the class A surface and create point to point lines on the suspected drafts.
• Create bisecting line with the two lines and point to create a tooling axis.
• BISECTING LINES were used to get the exact medium from the two sides so that maximum positive draft angle can be achieved.

Draft Analysis

CLASS B SURFACE:

• Take a 2.5mm Offset from Class A Surface upward towards the unfinished surface we get .
• Use a commands like multi section surface, trim and join to fill it both surfaces, This is Class B Surface.

Class C Surface:

• Unhide the A Surface to Take a boundary as a reference to make C surface.
• Go to sweep line-> with Reference Surface 93 degree draft angle for all sweep.
• And join all the sweep parts to make a Class C surface.

Class C & Class A Surfaces:

• Join the both finished Class C and Class A surfaces.
• Trim the exces part in B surface with use of joined surface.

Attachment Feature Creation:

Rib:

• Extract the base surface where we need and make a sketch 2 parallel lines,

the values I used mentioned the diagram given below.

Screw Boss:

• Using a same extract create for ‘Rib’, create a sketch, the measurements are taken by diagram given below.

Draft Analysis on feature creation