Milling can be
described as an end mill, (a tool similar to a drill bit) rotating into
a piece of material to achieve a certain shape. For the purpose of this
project imagine a train running around a track in a circle. The train
represents the end mill and the inside of the circle would be your
finished product. Your job is to calculate the starting and end points
of this track using trigonometry, geometry and mathematics. These
points are created using a Cartesian Coordinate system.
starting point is at "zero zero" on the print.
HINT: Keep in mind that the
diameter of the end mill is .500, so your calculations will have to
reflect this to maintain the correct dimensions of the part!
complete your calculations, you will need to decide if you want a 2 or
4 flute end mill. Two flute end mills provide good chip carrying
capacity. They are an excellent choice where the tool is buried in the
work (price: $10.08 per half inch end mill). Four flute end mills last
longer, provide finer finishes, and have higher metal removal rates
than two flute end mills (price: $12.98 per half inch end mill). Please
justify your decision.
will not affect your "x" and "y" coordinates.
HINT: It does not matter what
direction you go from the starting point!
advanced understanding of how a milling machine operates, imagine a
pencil being held vertical in your hand over a piece of paper. This
represents the end mill. With your other hand move the paper around in
a circle. Theoretically, you can draw a circle without moving your
pencil. In milling, the table moves to your x and y coordinates and
your end mill stays in one spot. This is the basic operation of milling.