| 摘要 |
The present invention discloses a reamer ( 20 ) and a method for reaming, for enlarging a pre-existing hole in a workpiece by rotational and axial cutting. The reamer ( 20 ) includes a body ( 24 ) extending from a shank ( 22 ). The body ( 24 ) has a first flute ( 30 ) providing a first flute cutting edge ( 32 ) at a distal end ( 34 ) of the body ( 24 ) for imparting a first cutting operation to the workpiece. The body ( 24 ) has a helical flute ( 42 ) providing a helical flute cutting edge ( 46 ) in the body distal end ( 34 ), radially spaced apart from the first flute cutting edge ( 32 ) for imparting a helical cutting operation to the workpiece. The first flute and helical flute cutting edges ( 32, 46 ) concurrently and collectively perform the first and helical cutting operations to a sculpture surface of the workpiece, thereby improving tolerances of the cutting operations, varying loads imparted to the workpiece and the reamer ( 20 ), and reducing heat generated therebetween.
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