Cutting by use of rotating axially moving tool – Tool or tool with support – Having inversely angled cutting edge
Patent
1992-10-30
1994-02-01
Rosenbaum, Mark
Cutting by use of rotating axially moving tool
Tool or tool with support
Having inversely angled cutting edge
408224, 408229, B23B 5102
Patent
active
052827054
ABSTRACT:
A burnishing drill includes a cylindrical shank and a drill body connected to the shank. Drilling edges, reaming faces and reaming edges are formed on a first reduced-diameter portion, a second reduced-diameter portion and a third reduced-diameter portion located at a foremost end of the drill body respectively. The reaming faces which are located axially at backward positions of the drilling edges and the reaming edges extend radially outward from the foremost end of the drill and incline axially in the rearward direction, and also extend radially outward and incline in the rearward direction with respect of the rotational direction. Since an inner surface of the hole drilled and reamed by the drilling edges and the reaming edges can be further smoothed by the reaming faces, the surface roughness of the finished hole can be much improved.
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Fukui Akio
Shiga Kiyotaka
Shimizu Manabu
Yamashita Tsunehisa
Yasuhara Masaki
Fuji Seiko Corporation
Husar John M.
Rosenbaum Mark
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