Challenge

Week 8 - Challenge 4 - Coin Holder Design

MM.Dinesh Kumar31 Dec 2021

OBJECTIVE:

To create coin holder component with the given class A surface and to perform draft analysis on it.

CLASS A SURFACE:

It is the outermost surface of the component with high accuracy and precision. It has aesthetic value and cannot be modified without authorization.

CLASS B SURFACE:

It is the inner surface of the component which we get after thickening it. The engineering features are attached to it.

CLASS C SURFACE:

It is the surface which joins the class A and class B surfaces along the boundaries.

COIN HOLDER DESIGN:

TOOLING AXIS CREATION:

Step 1: Check the boundary of the class A surface and ensure there is no gap in between the surface.

Step 2: Create an axis system on the class A surface by creating a point on it.

Step 3: Draw a sketch by intersecting class A surface with YZ plane.

Step 4: Since the edges are parallel to the YZ plane, a perpendicular line is drawn to the base surface and it is taken as tooling axis.

DRAFT ANALYSIS ON CLASS A SURFACE:

Step 1: Change the view to customized view and enable the material in shading option.

Step 2: Insert the feature draft analysis.

Step 3: Click the compass icon and place the compass along the tooling direction.

Step 4: Lock the draft direction and select the component to draft.

Step 5: Enable the color scale and change the draft value as required. Here 3 degree is given as draft angle.

Step 6: The green color indicates that the surface is more than 3 degree from the tooling direction. The blue color indicates that the surface is 0 to 3 degree from tooling direction. Red color indicates that the surface is less than 0 degree from tooling direction which indicates the negative draft.

NOTE: Here, the draft is not given on the class A surface. So, some surfaces are red in color. We should not modify class A surface without authorization.

CLASS B SURFACE:

Step 1: Extract the individual surfaces from the class A surface.

Step 2: Untrim the extracted surfaces and extrapolate them as required.

Step 3: Offset the extrapolated surfaces in appropriate direction to get the thickness (2.5mm) of the component.

Step 4: Trim the offset surfaces and give fillets as required to get the class B surface with required wall thickness.

CLASS C SURFACE:

Step 1: Create the boundaries for the class A surface.

Step 2: Sweep the boundaries perpendicular to the adjacent class A surface to get the class C surface.

The blue surface is the class C surface and the yellow surface is the adjacent class A surface.

FINAL TRIM:

Finally trim class A, class B and class C surfaces to get the switch bezel surface and make sure that it does not have boundary. Then use closed surface feature to create a solid component and perform draft analysis along the tooling axis.