CUTTING INSERT AND METHOD FOR MANUFACTURING CUTTING INSERT

Title:

CUTTING INSERT AND METHOD FOR MANUFACTURING CUTTING INSERT

Document Type and Number:

WIPO Patent Application WO/2021/255852

Kind Code:

A1

Abstract:

This cutting insert comprises a base member and cutting tips. In the thickness direction of the base member, the base member has a bottom surface and a top surface that is the opposite surface to the bottom surface. In a plan view seen along the thickness direction, the top surface has a polygonal shape consisting of a plurality of sides. The top surface is provided with a protruding portion that protrudes toward the opposite side to the bottom surface in the thickness direction. In the protruding portion, a through hole that passes through the base member in the thickness direction is formed. The protruding portion has side surfaces that are joined to the top surface. In a plan view seen along the thickness direction, the side surfaces comprise curve lines that are convex to the side opposite to the through hole. The curve lines include a plurality of vertices at positions where the distance to the plurality of sides is smallest. The cutting tips are brazed to the top surface and the side surfaces so as to annularly surround the protruding portion.

Inventors:

HARADA GAKU (JP)
HIRAO SATORU (JP)
ITOHARA IKUROU (JP)

Application Number:

PCT/JP2020/023736

Publication Date:

December 23, 2021

Filing Date:

June 17, 2020

Export Citation:

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Assignee:

SUMITOMO ELECTRIC HARDMETAL CORP (JP)

International Classes:

B23P15/28; B23B27/18

Foreign References:

JPS58120406A	1983-07-18
JP2008501539A	2008-01-24
JPH10118824A	1998-05-12
JP2013530844A	2013-08-01
JP2009529432A	2009-08-20
JP2014121772A	2014-07-03
JPS6053404U	1985-04-15

Other References: