Week 8 - Challenge 3 - Coin Holder Design

Preliminary Draft Analisys on Class-A surface

• First of all place an axis in the middle point of the coin holder's bottom face. This axis sys allows to create two intersection (in two perpendicular planes), and thus two bisecting lines, respectively.
• Sketch 1: considering the critical walls of the first intersection, create a line tangent to each. Then the first bisecting line can be created.
• Skecth 2: considering the critical walls of the second intersection, create a line tangent to each. Then the first bisecting line can be created.
• The real tooling axis will be the resulting bisecting line between Sketch.1 and Sketch.2.

Sketch 1

Sketch 2

Resulting Tooling Axis

• The first attempt of Draft Analisys on Class-A surface with the use of the Tooling Axis can now be done.
• The result is completely green, meaning that the surface at this stage of design can be cleared along the selected tooling axis.

Preliminary Draft Analisys on Class-A

• Now it is necessary to prepare the initial trim surface. To so do, offset according to the thickness value of 2,5mm every single main element of the part. Whenever there is any computational error due to the edge-fillets, I used the "extrapolate and trim" workaround.
• Apply again the missing edge-fillets on the B-Surface with the role: "A-RAD" - "THK value" (for internal edges), or "A-RAD" + "THK value" (for external edges).
• To Create the C-Surface Class-A boundaries have been used to generate a sweep with reference surface (Class-A itself), of 90°. If needed, add a little of extrapolation to allow the Final trims and splits.
• Join A-B-C surfaces. This surface must have no selectable boundaries.

C-Surface

Final Join

• Use Close Body feature inside a PartBody.
• The final Draft Analisys should show that both, Class-A, B and C surfaces can be cleared along tooling axis.
  

ISO VIEW

FRONT VIEW

SIDE VIEW

TOP VIEW