Throwaway tip
AssigneeNgk Spark Plug Co., Ltd.
InventorsMakoto Shirai, Michinobu Ito, Osamu Kato
Life of this patent
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Abstract
A throwaway tip for use in a lathe cutting tool. The tip has a cutting edge along the outer periphery and a succession of recesses are formed on the cutting surface. The recesses form a chip curling and cutting mechanism irrespective of the driving direction of the tip. The recesses may be of uniform diameter or preferably increase toward the center of the cutting edge line. The recesses may also be bevelled to facilitate entry and cutting of the chips.
Claims10
In a throwaway tip for use in a lathe cutting tool, having a cutting edge formed about the periphery of the tip and a chip breaker groove formed on a surface, the improvement comprising, said breaker groove formed by a plurality of generally spherical recesses disposed adjacent said cutting edge and contacting each other.
In a throwaway generally triangular tip for use in a lathe cutting tool, having a cutting edge formed about the periphery of said tip and a chip breaker groove formed on a surface, the improvement comprising, said breaker groove formed by overlapping dimpled recesses extending about the circumference of said triangular tip, each of said recesses having an outer curved surface adjacent said cutting edge.
Dependencies are inferred from the claim text.