Cutting insert and cutting tool having same mounted thereon

Abstract

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 principalsurface; a fastening surface opposite to the principal surface, the fastening surface being placed on a seat surface of a cutting tool; a screw passage hole formed through the central portions of theprincipal 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 eachof the first and second long grooves includes: a proximal sidewall joining a first adjacent fastening portion of the fastening surface and making an acute angle with the first adjacent fastening portion; a distal sidewall joining 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 to be closer to the screw passage hole than the distal sidewall.

Description

technical field [0001] The present invention relates to a cutting tool and a cutting tool equipped with the cutting tool. Background technique [0002] Generally, a cutting tool is fastened to a cutting tool mounted on a machine tool, and is used to cut workpieces made of iron, non-ferrous metals, non-metallic materials, and the like. [0003] Such cutting tools typically have a main surface, a fastening surface and a plurality of side surfaces connecting the main surface with the fastening surface. A cutting edge is provided between the side surface and the main surface. [0004] figure 1 is a cross-sectional view showing a conventional cutting tool mounted on a fastening surface of a cutting tool, taken from a clamping screw and a hole, figure 2 yes figure 1 The bottom perspective view of the cutting tool, image 3 yes figure 1 A top view of the lower wall of the cutting tool, Figure 4 yes figure 1 side view of cutting tool. [0005] Such as Figure 1 to Figure...

AI Technical Summary

Problems solved by technology

[0010] However, in the existing cutting tool 12, since each of the protrusions 40, 42 only extends to the center of the hole, the cutting tool 12 is perpendicular to its axis of rotation ( Figure 4 When moving in the direction of A), there is a problem that the cutting tool 14 rotates around the hole 36 due to the radial load generated by the side cutting edge of the cutting tool 14 pressing on the workpiece.

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