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    • 9. 发明专利
    • CUTTING INSERT
    • JPH01121109A
    • 1989-05-12
    • JP10908287
    • 1987-05-06
    • SECO TOOLS AB
    • MATSUTEI ORABI NIEMI
    • B23B27/04
    • PURPOSE: To form a split surface at the time of cutting into a flat surface with good finishing by forming the highest level area on the identical side to an insert as a cutting edge advances cutting, at a first surface and/or a rake surface. CONSTITUTION: This cutting insert 10 splits a rod or the like while rotating, whereas an angle λ is formed between a line 16 coming into contact with a first surface 15 and parallel to a cutting edge 12 and a line perpendicular to the tangential direction T at a processing position, and an angle γ is formed between a line 19 coming into contact with a rake surface 18 and parallel to the cutting edge 12 and a line 20 perpendicular to the tangential direction T to provide the highest level area on the identical side to the insert 10 at both surfaces 15, 18 as the cutting edge 12 advances cutting. A cutting edge front edge angle is set at 4 to 8 degrees, λ is at 1 to 4 degrees, and γ is at 4 to 7 degrees. It is thus possible to obtain a flat surface whose split surface is a good finishing surface in using the cutting insert for cutting work.