Creo Drawings

At the beginning of this design I tried using the freestyle option in the Creo software which I thought was the most effective way of achieving the desired design outcome. This, although a very inaccurate method of achieving a drawing to a specific dimension, provided a preview as to what the final outcome of the speaker could look like.

As in the above the method of achieving a more accurate drawing was to draw half a sectional view of the desired shape and to revolve it about 360 degrees. It is also possible to add a thickness to the material, which was not required as this drawing was drawn to provide the thickness of the material. In order to provide a thickness to a revolution the section must be drawn as one line/surface.

The next step in this process was to provide a method of holding the speaker. This shall be shown a little later, however what was required in this drawing was a recess of 0.5mm into the front face of the 3/4 sphere. The method in which the recess was achieved was by drawing a cirle half the size of the front face of the speaker housing. Then by extruding the circle to remove material at a thickness of 0.5mm, as shown below. Due to the CNC only being able to achieve a cut at a circumference 180 degrees I was required to cut the sphere through highest point of the 3/4 sphere (The midway point of a full sphere). This was done by drawing a large rectangle bigger than the size of the sphere on the correct datum plane as shown below. Then by extruding the rectangle and clicking on remove material it was possible to CNC both sides of the sphere individually. 

The image below depicts the method of making the file ready for CNC. Firstly the file must be saved and then Save As to a .stl format. This opens a small window on the page with which the Cord Height must be changed to 0. By clicking apply a red wire frame surrounds the drawing. This portrays the path through which the 3.6mm Ball-nose cutter shall take in the CNC.

This process was simply repeated for the rear of the speaker housing. as shown below.

 The next step was to design the a method of securing the speakers into position.This drawing shall not however be used for machining purposes it provides a good indication as to the overall aesthetics of the final design and provides an indication as to how the speaker shall be secured.

Both speaker housings were drawn as a single line section and revolved about 360 degrees. A thickness of 0.5mm was also added in the revolve tab on Creo. These shall later be turned by hand on a lathe and vacume formed.

The drawings for the circuit board and speakers were previously provided. 

The speaker shall be housed in a clamp like process where the speaker is pressed against the speaker insert and the speaker front (below) is pressed on the front of the speaker and glued to the speaker insert.

Once all the parts had been drawn it was simply a matter of assembling the parts in Creo and investigating whether or not the parts will complement each other.