Alpha Geek
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Figure below illustrates the outer housing of a rotor assembly, of which a production volume of 100,000 is required. The assembly is designed to spin at a high speed during which the housing is subjected to high tensile stresses. Preliminary designs calculations suggest that the housing could be made of Aluminum alloy with a wall thickness in the range of 2.0 - 3.0 mm depending on the selected alloy. The wall thickness may be different for other candidate materials but low strength materials requiring an excessively thick wall should be avoided . A good surface finish of approximately 50 µ.in. is required. The part is 13 cm high. The large diameter is 20 cm which steps down to 17.5 cm at the midpoint. The bottom of the housing is open and the top has large hole of 12.5 cm diameter in the center surrounded by 12 1.5 - cm diameter holes. The inner and outer main surfaces may have a slight taper or draft, if required, for particular primary process choices. Some of the features on the finished part may be assigned to secondary processes. For these cases add an ordered list of the required secondary processes to the primary one, to create a simple production plan.
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