| 摘要 |
Apparatus and methods for forming a generally spherical object from a workpiece are disclosed. In one embodiment, an apparatus includes a frame having a laterally-projecting elongated member, and a support member slideably engaged with the elongated member. A motor is coupled to the support member and pivotably suspended below the elongated member. A surface treating member is attached to the shaft of the motor and is adapted to engage the workpiece. In an alternate embodiment, an apparatus includes two laterally-projecting elongated members and a pair of surface treating modules that engage the workpiece from opposite sides. In yet another embodiment, an apparatus includes three laterally-projecting elongated members and three surface treating modules that engage the workpiece from approximately equidistant directions. The inventive apparatus and methods advantageously allows gravity to naturally force the surface treating members toward the workpiece, thereby improving the engagement of the surface treating members toward the workpiece.
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