Week 9 - Challenge 2 - Switch Bezel Design

SWITCH BEZEL:

TREE STRUCTURE:

TOOLING AXIS CEATIONS(BISECTING METHOD):

Extract the base surface of the given Class- A Surface and create the center point of the Extracted surface.

Then create two lines on two planes by taking the cross section of the given surface in the particular plane.

tooling axis created from the x directions inclined lines(6 degree) using the cross section of the surface on y plane.

tooling axis created from the two lines using the cross section and also creating one with the help of cross section line of the surface on X plane as bisecting line.

And now by creating another bisecting line using those two plane sketches is the tooling axis for this particular Class - A surface.

CLASS A SURFACE:

CLASS B CREATIONS:

extracting the class - A surface without the fillets and then untriming and extrapolateing them to join them, and after that offset the surface to 2.5 mm thickness which forms as the Class - B surface.

And then filleting the edges to 12.5mm side wall

and bezel rest surface edges to 11.5.

CLASS C SURFACE CREATIONS:

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.

and then extrapolate the c surface body and trimming part out side elements.

then the class a surface and trim.9 surface body inserted by using the joining command options.

by using the trim command option for part body to neglated for out side elements.

FINAL OUTPUT:

CLOSED PART BODY AND DIFFERENT VIEWS OF PART BODY:

the final output for surface body then to converted solid body by using the closed surface body command option.

FRONT VIEW:

SIDE VIEWS:

TOP VIEW:

ISOMETRIC VIEW:

Draft Analysis:

When a plastic component is made, we can observe that there is a draft angle given on 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 when 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.