Indexible circular milling insert and milling tool

Abstract

The invention discloses an indexible circular milling insert, which comprises an upper surface, a lower surface and a rear tool face positioned between the upper surface and the lower surface, wherein a cutting edge zone face and a cuttings guide surface are formed on the upper surface; a plurality of positioning side faces are formed on the rear tool face; the cutting edge zone face and the rear tool face are intersected to form a plurality of cutting edges capable of being alternatively applied; a part with the maximum actual cutting thickness on the cutting edge is a cutting edge front end part; a part with the minimum actual cutting thickness on the cutting edge is a cutting edge bottom end part; the width of the cutting edge zone face is gradually narrowed at each cutting edge in a direction from the cutting edge front end part to the cutting edge bottom end part; and an inclined angle formed between the cutting edge zone face and the cuttings guide surface is gradually enlarged, and the effective width of the cuttings guide surface is gradually reduced. By the indexible circular milling insert, the cutting edge can be effectively prevented from being abnormally damaged locally, and the service life is long. The invention also discloses a milling tool, which comprises a tool body provided with the indexible circular milling insert.

Description

Technical field [0001] The invention relates to the field of metal cutting processing, in particular to indexable circular milling inserts and milling tools. Background technique [0002] Milling tools used for metal chip removal processing usually include a rotatable milling cutter body (usually mostly steel), and multiple replaceable milling blades made of cemented carbide, ceramics and other materials. The milling tool composed of the circular milling insert and the corresponding milling cutter body, based on its own characteristics, is usually used in cavity processing, profiling processing, plane processing, etc., and is widely used. [0003] The available cutting edges of round milling inserts are all on the circumferential edge of the insert. The number of times the insert is used is roughly judged according to the amount of cutting. There is no fixed number of cutting edges. The cutting edge structure design of traditional round milling inserts is usually relatively simple ...

AI Technical Summary

Problems solved by technology

Cutting speed, depth of cut, feed, rake angle, and cutting edge strength have a great influence on the damage of the cutting edge of the circular milling insert. In actual cutting, the area with a large cutting edge height corresponds to a large cutting thickness, while the traditional The circular milling insert has the same cutting edge structure throughout the entire circumference. It is obviously unreasonable to use the same cutting structure for different cutting situations. The cutting edge area here is relatively prone to abnormal damage, which affects the service life of the tool.

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