Cutting insert and cutting tool
AssigneesNational University Corporation Tokai National Higher Education and Research System, Ntk Cutting Tools Co., Ltd.
InventorsEiji Shamoto, Takashi Ueda
Life of this patent
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Abstract
A structure for cooling a rake face of a cutting insert in a region near a tip of a cutting edge. The cutting insert includes a rake face, a cutting edge formed on an outer periphery of the rake face, a base portion that supports the rake face, and an internal cooling path through which fluid for cooling the rake face flows. The internal cooling path includes an introduction flow path and a cooling flow path, and the cooling flow path is disposed behind a region in which a chip of a workpiece comes into contact with rake face. The cooling flow path is provided at a depth of less than or equal to 1.5 mm from the rake face.
Claims10
A cutting insert comprising:
- a thin plate member having a top surface that serves as a rake face;
- a cutting edge formed on an outer periphery of the rake face;
- a base portion that supports the thin plate member;
- and
- a plurality of internal cooling paths recessed within the base portion, through which fluid for cooling the rake face flows,
- wherein the plurality of internal cooling paths are provided between the base portion and a bottom surface of the thin plate member,
- wherein the entire bottom surface of the thin plate member is planar with respect to the plurality of internal cooling paths, and
- wherein a plurality of flow-path openings that serve as outlets of the plurality of internal cooling paths is provided in flank faces of the base portion in a region near the cutting edge.
Dependencies are inferred from the claim text.