Deburring Tool

Abstract

A deburring tool has a hollow top portion having an interior conical surface and an exterior surface. The exterior surface of the deburring tool is preferably conical. The top portion has a plurality of flutes formed therein and extending between the interior and exterior surfaces. Each of the flutes has a cutting edge formed at the interior conical surface. In operation, rotation of the deburring tool about a longitudinal axis removes burrs projecting from bar stock contacting the interior conical surface. A method of deburring bar stock comprises: (a) rotating the deburring tool about a longitudinal axis, and (b) contacting the bar stock to the deburring tool interior conical surface.

What is claimed is: 
     
         1 . A deburring tool comprising a hollow top portion having an interior conical surface and an exterior conical surface, said top portion having:
 (a) a tool face;   (b) a longitudinal axis; and   (c) an exactly three flutes formed therein extending between said interior and exterior surfaces, each of said flutes having a cutting edge formed at said interior conical surface, said cutting edge forming an angle as measured from said longitudinal axis of said top portion, whereby rotation of said deburring tool about said longitudinal axis removes burrs projecting from bar stock contacting said interior conical surface.   
     
     
         2 . The deburring tool of  claim 1 , wherein each of said flutes has an oblong configuration with oppositely disposed semicircular top and bottom end portions. 
     
     
         3 . The deburring tool of  claim 2 , wherein the distance between a center point of each said semicircular top end portions and a center point of each said semicircular bottom end portions is approximately 0.520 in (1.321 cm). 
     
     
         4 . The deburring tool of  claim 2 , wherein each of said semicircular top end portions terminate the same distance from said tool face and each of said semicircular bottom end portions terminate the same distance from said tool face. 
     
     
         5 . The deburring tool of  claim 2 , wherein each of said semicircular bottom end portion of said flutes has a center of curvature that is offset from said longitudinal axis by 0.050 inch (0.127 cm). 
     
     
         6 . The deburring tool of  claim 1 , wherein said cutting edge and said interior conical surface form an angle between 10 and 20 degrees. 
     
     
         7 . The deburring tool of  claim 1 , further comprising a tool shaft portion extending downwardly from said hollow top portion, said shaft portion having a longitudinal axis coextensive with said top portion longitudinal axis. 
     
     
         8 . The deburring tool of  claim 7 , wherein said tool shaft portion is configured for attachment to a drill. 
     
     
         9 . The deburring tool of  claim 7 , wherein the cross-section of said tool shaft portion is hexagonal. 
     
     
         10 . The deburring tool of  claim 1 , wherein said deburring tool is configured to deburr bar stock having a cross-sectional profile selected from the group consisting of round, square, triangular, rectangular, pentagonal, hexagonal, heptagonal and octagonal. 
     
     
         11 . The deburring tool of  claim 1 , wherein said deburring tool is configured to deburr bar stock having an exterior surface conformation selected from the group consisting of smooth, threaded, knurled, knobby, pocked and serrated. 
     
     
         12 . A deburring tool comprising a hollow top portion having an interior conical surface and an exterior conical surface, said top portion having:
 (a) a tool face;   (b) a longitudinal axis; and   (c) a plurality of flutes formed therein extending between said interior and exterior surfaces, each of said flutes having a top end and a bottom end, wherein each of said top ends terminate the same distance from said tool face and each of said bottom ends terminate the same distance from said tool face, each of said flutes having a cutting edge formed at said interior conical surface, said cutting edge forming an angle as measured from said longitudinal axis of said top portion, whereby rotation of said deburring tool about said longitudinal axis removes burrs projecting from bar stock contacting said interior conical surface.   
     
     
         13 . The deburring tool of  claim 12 , wherein the distance between a center point of each said top ends and a center point of each said bottom ends is approximately 0.520 in (1.321 cm). 
     
     
         14 . The deburring tool of  claim 12 , wherein each of said bottom end of said flutes has a center that is offset from said longitudinal axis by 0.050 inch (0.127 cm). 
     
     
         15 . The deburring tool of  claim 12 , wherein said cutting edge and said interior conical surface form an angle between 10 and 20 degrees. 
     
     
         16 . The deburring tool of  claim 12 , further comprising a tool shaft portion extending downwardly from said hollow top portion, said shaft portion having a longitudinal axis coextensive with said top portion longitudinal axis. 
     
     
         17 . The deburring tool of  claim 16 , wherein said tool shaft portion is configured for attachment to a drill. 
     
     
         18 . The deburring tool of  claim 16 , wherein the cross-section of said tool shaft portion is hexagonal. 
     
     
         19 . The deburring tool of  claim 12 , wherein said deburring tool is configured to deburr bar stock having a cross-sectional profile selected from the group consisting of round, square, triangular, rectangular, pentagonal, hexagonal, heptagonal and octagonal. 
     
     
         20 . The deburring tool of  claim 12 , wherein said deburring tool is configured to deburr bar stock having an exterior surface conformation selected from the group consisting of smooth, threaded, knurled, knobby, pocked and serrated.