| 摘要 |
A device for shaping a plurality of an object with a profile of at least partial sphere defined by a radius, Rsph and a maximum depth, Dmax of the sphere comprises a shaft set rotate-able on a primary axis and at least one cutting element fabricated on attachment apparatus. Each cutting element has been shaped with at least a portion of circular cutting edge with a uniform radius, rCE, is able to spinning-able on a secondary axis and revolts on a circular orbit around the primary axis. The orbit of each cutting element is defined as a motion track of a circular center of the cutting edge around the primary axis and characterized by a radius, rorb and a tilted angle α thereof.
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