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CEMENTED CARBIDE SQUARE END MILL HAVING OUTER PERIPHERAL EDGE EXCELLENT IN CHIPPING RESISTANCE IN HIGH SPEED CUTTING
CEMENTED CARBIDE SQUARE END MILL HAVING OUTER PERIPHERAL EDGE EXCELLENT IN CHIPPING RESISTANCE IN HIGH SPEED CUTTING
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机译:硬质合金方头铣刀在切削时的抗切削力方面表现出出色的外周边优势
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摘要
PROBLEM TO BE SOLVED: To provide a cemented carbide square end mill having an outer peripheral edge excellent in chipping resistance in high speed cutting.;SOLUTION: This cemented carbide square end mill is constituted of a cutting edge part and a shank part, and at least the cutting edge part is made of a tungsten carbide group cemented carbide. The end mill has a structure in which a cylindrical cut-out bottomed hole concentrically exists along the longitudinal direction of the cutting edge part on a bottom edge surface of the cutting edge part and a cylindrical tip made of the relatively heavy tungsten carbide group cemented carbide is fitted into the cylindrical cut-out bottomed hole. The cutting edge part made of a sintered compact of powder green compact having a composition made of Co: 8 to 10 mass%, chrome carbide and/or vanadium carbide: 0.1 to 1.5 mass%, a composite carbide of Ta and Nb: 0.1 to 1.5 mass% as necessary and tungsten carbide: remainder. The cylindrical tip is made of a sintered compact of powder green compact having a composition made of Co: 0.5 to 2 mass% and tungsten carbide: remainder. The diameter of the cylindrical tip is made a dimension corresponding to 25 to 45% of an outer diameter of the outer peripheral edge of the cutting edge part, and the length is made a dimension corresponding to 20 to 40% of the length of the cutting edge part.;COPYRIGHT: (C)2003,JPO
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