Face milling cutter blade and indexable face milling cutter

Abstract

The invention discloses a face milling cutter blade and an indexable face milling cutter. The cutter blade is provided with upper and lower surfaces, a main rear cutter surface and upper and lower side auxiliary rear cutter surfaces; the included angle between the upper and lower side supporting surfaces of the upper and lower surfaces and the main rear cutter surface is 90 degrees, that is, the cutter blade is a negative angle cutter blade; the upper and lower surfaces and the main rear cutter surface intersect to form a main cutting edge; projections of the main cutting edge on the upper and lower side supporting surfaces of the upper and lower surfaces fall on the four sides of a quadrangle respectively, and auxiliary cutting edges are arranged between each two of the four sides; the upper and lower side auxiliary rear cutter surfaces which all the auxiliary cutting edges correspond to intersect to form folio lines, and positive cutter blade rear angles gamma 1 which are mutually opposite are formed. The negative angle cutter blade with the auxiliary cutting edges which are provided with the positive rear angles is detachably mounted on the periphery of a cutter body, and cutting sharpness and good chip discharging performance and economical effect are achieved through detachable mounting of the negative angle cutter blade and the NP edges.

Description

technical field [0001] The invention relates to the technical field of metal cutting tools, in particular to a face milling insert and an indexable face milling cutter in which a negative angle insert with a secondary cutting edge and a positive clearance angle is detachably installed on the outer periphery of the cutter. Background technique [0002] In face milling, there are three practical combinations of radial rake angle (R.R.) and axial rake angle (A.R.) in the rake angle of face milling cutters, including the DP edge type ( Double positive edge type), DN edge type (double negative edge type) with both negative (-) rake angles, and NP with negative (-) radial rake angle and positive (+) axial rake angle Edge type (positive and negative edge type), among which the DP edge type has the best cutting sharpness and the worst chip removal performance, the DN edge type has the worst cutting sharpness and good chip removal performance, and the NP edge type has the best cuttin...

AI Technical Summary

Problems solved by technology

[0005] Disclosed in Chinese patent CN1537691A is a cutting tool and a cutting blade used for the cutting tool. The inclination angle of the arc is limited, and the insert itself is a negative-angle insert, so the milling tool can only use DN edge type, which has poor cutting sharpness and good chip removal performance.

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