Week 9 - Challenge 2 - Switch Bezel Design
Draft Analysis
When a plastic component is made, we can observe that there is a draft angle given an each side from the base which is lesser than 90 degrees. this is because in the criteria of making a plastic material the mold should release the material when finished. if the mold surfaces are 90 degrees the material won't release from the mold because of friction due to contraction of material whwn cooled.
To resolve this problem we CAD engineers maintain a standard rule to design the plastic mold or die's in such a way that there is no problem while ejecting the plastic component. so a minimum of 3-10 degrees of draft angle is given to every plastic component while designing.
Draft analysis is performed on the given class-A surface, and it is clearly observable that there is no negative draft on the surface.
Tooling axis creation
The tooling axis is the direction of drawing a sheet metal where the finished component is easily ejected on a particular direction and axis. The tooling axis is important for removing the material when finished.
The tooling axis is created for the given class-A surface.
creation of tooling Axis (Bisecting method)
1.Extract the base surface of the given class- A surface and create the center point of the Extracted surface.
2.Then create two skecthes on two planes by taking the cross section of the given surface in the particular plane.
creation of class- B and class - c surface
extracting the class - A surface without the fillets and then untriming and extrapolateing them to join them, and after that offset the surface to 2.5mm thickness which forms as the class - B surface.
And then filleting the edges to 12 mm
class - C surface
By extracting the boundary of the class - A surface the surface required for the class - C is obtained.
using the smooth curve option a smooth surface can be obtained by sweeping the line towards the direction of the tooling axis.
Triming and joining the all the class surfaces together
Final output
Drafting of final surface
performing draft analysis on the final platic solid model
various views
