Indexable face milling and cutting insert

摘要

Between the secondary clearance surface pair formed apex angle portion (1) to (C) insert body which forms a plate of substantially polygonal shape (4b), smoothly tangentially (4b) the secondary clearance surface are connection flank of the top of the vertical angle portion having a substantially convex surface shape toward the outside (4c) is formed, when viewed from the direction (B) bisector apex angle portion of (C), the top of the apex angle portion flank of (4c) extends over the entire thickness of the insert body (1), flank the top of the apex angle part and (4c), borderline secondary cutting edge of the pair with (5b) (6a) are parallel to each other curve ridge to have a relationship, as viewed from a direction facing the rake face (2), it is formed at the intersection ridge portion (2) rake face (4c) flank the top of the apex angle portion and (5c), top curves and ridges formed at the intersection ridge portion (3) and the seating surface (4c) of the flank angle of the top portion is substantially the same shape.