Week 8 - Challenge 4 - Coin Holder Design

COIN HOLDER CLASS-B&C SURFACE CREATION:

STEP 1: CONNECTIVITY OF CLASS-A SURFACE

• First check the connectivity of the given surface or component.
• This is done by creating boundaries or by using Join command.
• Ensure that there is no gap between surface connection.

STEP 2: TOOLING AXIS CREATION

• First visually analyse the possible direction of Tooling direction.
• The side walls of the coin holder has 90`degree`on 4 sides.
• So the Tooling axis will go along with normal to the base surface.

FAULT IN DRAFT ANGLE IN GIVEN CLASS-A SURFACE:

While perform Draft analysis on given Class-A surface, the side walls has negative angle.

The information will need pass to class-A surface designer.

STEP 3: B-SURFACE CREATION

• B-surface creation is done by offsetting class-A surface to required thickness.
• Offsetting class-A surface with fillets are more complicated, so go with extract and untrim the surfaces.
• Extract the all the sketch or surfaces used to create object and Untrim it.
• Extrapolate the surfaces till interact each relative surfaces.
• OFFSET it into required thickness of part
• Trim the surfaces to get proper surface without fillets, then fillet it.

TRIMS

STEP 4: CLASS-C CREATION

• Create the boundary around the given Class-A surface.
• If this boundary has more surface, then split it into two or more boundary around the surface.
• Here the boundary has lots of intermidiate joints, this create gap while sweeping..

• Now sweep the boundary with direction of tooling axis.
• This sweeping area is the thickness of the Class-C surface.
• Make extrapolate the sweep area to attain the intract with Class-A and Class-B surface if required.
• Do trim operation sweep area with both class-A&B surfaces.

FILLET

make it solid by using close command on Part workbench

STEP 5: DRAFT ANALYSIS

• Draft analysis is done after determine the tooling axis.
• Ensure weather all the surface angles are more than 3 degrees along with tooling axis direction.
• There are some colour codes are used to easily determine the angle value
• If the whole angle is more than 3 degrees, then surface colour turned into Green for one type scale and for another scale it has 5 colour variation.
• Here our surface area has more than 3 degrees.
• Below 0° angle indicated by red in colour, these are has negative angles

As we saw first, the draft angle is negative on their side walls. this will make difficulties while creating mould.

VIEWS: