Cutting insert and cutting tool including the same

Abstract

The invention provides a cutting insert and a cutting tool including the cutting insert, wherein the clamping force of the insert is improved, and the insert strength and chip discharge performance are improved. A cutting insert (10) is provided with: an upper surface (17) which is a first end surface; a lower surface that is a second end surface that is a surface on the opposite side from the upper surface 17 and that has an attachment surface to which the cutting tool 100 is attached; a threaded hole H having an axis line penetrating from the upper surface 17 to the lower surface; a peripheral side surface 15 formed so as to connect the upper surface 17 and the lower surface; a main cutting edge (21) and an inner cutting edge (22) which are respectively formed in an intersection region between the upper surface (17) and the peripheral side surface (15) and an intersection region between the lower surface and the peripheral side surface (15); and a constraining surface (40) which is formed on the peripheral side surface (15) so that at least a portion of the constraining surface (40) is in contact with the main body (150), the angle of the main cutting edge (21) is different from the angle of the constraining surface (40) in a plan view viewed from the upper surface (17), and the angle of the main cutting edge (21) is smaller than the angle of the constraining surface (40).

Description

technical field [0001] The present invention relates to a cutting insert and a cutting tool including the cutting insert. Background technique [0002] Cut workpieces such as metals with cutting inserts attached to the tool body. In these cutting tools such as high-feed tools, conventionally, in order to improve the grip performance of the cutting insert on the main body, the flank shape of the cutting insert has been improved. For example, Patent Document 1 discloses a technique in which, if the region serving as the constraining surface on the side surface of the cutting insert is inclined so as to be farther away from the central axis O1 of the through hole as it goes from the upper surface side to the lower surface side, it is possible In view of this, by making the first and fourth faces of the cutting insert parallel to the central axis O1 in a cross section including the central axis O1 of the through hole, the bracket is placed on the first and fourth faces. The su...

AI Technical Summary

Problems solved by technology

[0007] However, when configured as described above, it is effective for the force to slide the blade toward the outer peripheral side, but sometimes it is still insufficient for the force to rotate the blade.

In addition, if the insert strength and chip discharge performance are not considered as in Patent Document 1, chipping of the insert may easily occur during machining.

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