Cutting tool and indexable cutting insert with mounting cutout for use therewith

By designing indexable cutting inserts with specific cutting edges and mounting kerfs, the problems of insufficient manufacturing efficiency, strength, rigidity, and chip removal safety in existing technologies have been solved, achieving efficient fixing and efficient chip formation, and improving the overall performance of the cutting inserts.

CN122138879APending Publication Date: 2026-06-02ISCAR LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
ISCAR LTD
Filing Date
2024-10-28
Publication Date
2026-06-02

AI Technical Summary

Technical Problem

Existing indexable cutting inserts are inadequate in terms of manufacturing efficiency, strength, rigidity, and safety during chip formation and chip removal, and are difficult to retain efficiently in insert holders.

Method used

An indexable cutting insert is designed with opposing end surfaces, an outer peripheral surface, and a central axis. It includes at least two cutting portions and a mounting notch. The cutting edge is designed as the outermost radial cutting point. The mounting notch intersects with the end surfaces and defines a specific plane and an imaginary circle in the end view of the cutting insert, which enhances strength and rigidity. The design of the side surface direction of the mounting notch reduces the risk of chip collision.

Benefits of technology

It improves manufacturing efficiency, enhances the strength and rigidity of cutting inserts, achieves efficient chip formation and reduces the risk of accidental collisions during chip removal, while also efficiently securing the insert to the insert holder.

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Abstract

A cutting tool has an indexable cutting insert removably fixed to a retaining portion of an insert holder. The cutting insert has: opposing first and second end surfaces, an outer peripheral surface of the insert, and a central axis extending therebetween; at least two cutting portions; and at least one mounting kerf. Each cutting portion has a cutting edge formed by the intersection of a rake surface and a flank surface formed on the outer peripheral surface of the insert, one rake surface facing a first direction of rotation about the central axis, and the other rake surface facing an opposite second direction of rotation. Each mounting kerf extends between the first and second end surfaces and has spaced-apart first and second side surfaces disposed on the outer peripheral surface of the kerf, the outer peripheral surface of the kerf being separate from and spaced apart from the outer peripheral surface of the insert. The first and second side surfaces face the first and second directions of rotation, respectively.
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