Korloy Inc.

Tae Kyun Kim

Young Heum Kim

Ki Chan Nam

Nam Seon Lee

Hyo San Kim

Min Seok Oh

Sang Yong Lee

A cutting insert according to an embodiment of the present invention is a double-sided cutting insert comprising an upper surface, a lower surface, a side surface, a cutting edge, and a mounting hole penetrating the upper surface and the lower surface, in which the upper surface is provided with a single upper surface boss portion that surrounds the mounting hole and is flat, the cutting edge includes a main cutting edge, a corner cutting edge extending from the main cutting edge, a sub-cutting edge extending from the corner cutting edge, and a side portion extending from the sub-cutting edge, a first main cutting edge flank surface extending from the main cutting edge forms an acute angle with an extension line of the upper surface boss portion, a sub-cutting edge chip breaker surface extending from the sub-cutting edge is at a gradually increasing angle with the extension line of the upper surface boss portion, as the sub-cutting edge chip breaker surface is distanced away from the corner cutting edge, and when the cutting insert is viewed into the upper surface, a side portion surface extending from the side portion is concavely recessed.

Cutting insert and cutting tool having same mounted thereon

Cutting insert for machine tools for metalworking

Cutting insert

The technical objective of the present invention is to provide a cutting insert that can minimize a phenomenon in which the cutting insert is lifted up from a seat surface of a cutting tool while a cutting process is being performed, and can increase an area by which the cutting insert is fastened to the cutting tool. To this end, the cutting insert of the present invention comprises: a principal surface; a fastening surface opposite to the principal surface, the fastening surface being placed on the seat surface of the cutting tool; and a screw passage hole formed through each of central portions of the principal and fastening surfaces, wherein a screw is fastened to the cutting tool through the screw passage hole; and first and second long grooves extending across the fastening surface, wherein each of the first and second long grooves includes: a proximal sidewall adjoining a first adjacent fastening portion of the fastening surface and making an acute angle with the first adjacent fastening portion; a distal sidewall adjoining a second adjacent fastening portion of the fastening surface and making an angle with the second adjacent fastening portion; and a ceiling wall connecting the proximal and distal sidewalls, wherein the proximal sidewall is located closer to the screw passage hole than the distal sidewall is located to the screw passage hole.

Growing community of inventors

Cheongju-si, South Korea

Tae Kyun Kim