Cutting by use of rotating axially moving tool – Plural tool-assemblages – Coaxial
Patent
1978-03-16
1979-08-21
Vlachos, Leonidas
Cutting by use of rotating axially moving tool
Plural tool-assemblages
Coaxial
408 37, 408115R, 408191, 408224, B23B 4100, B23B 5108
Patent
active
041652002
ABSTRACT:
The burr formed on the breakout side of a workpiece during a drilling operation is removed by a deburring bit positioned underneath the workpiece in axial alignment with the drill bit. The drill bit is of the twist type and has at least two longitudinal flutes joined by a web and separated by an equal number of longitudinal lands. The deburring bit has a number of radially extending cutting elements which project radially outwardly from adjacent the bottom of each flute to substantially beyond the diameter of the hole. At the bottom of the flutes, the radially extending cutting elements are spaced to pass the web of the drill bit axially therebetween and to engage the flutes when the drill bit is rotated.
REFERENCES:
patent: 2899851 (1959-08-01), Grobecker
patent: 3063312 (1962-11-01), Mueller
Fishel Grace J.
Vlachos Leonidas
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