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Cutting insert and rotary cutting tool

By designing a protrusion on the cutting insert to adjust the corner rounding surface and setting an appropriate insert mounting seat, the problem of radial forward tilt angle and design freedom when installing the cutting insert is solved, the strength and fixation of the insert are improved, and the More stable cutting results.

Active Publication Date: 2014-02-26
TUNGALOY CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the corner curved surface of the groove to be formed varies depending on the width and depth of the groove to be processed, it is not possible to freely set the corner rounded surface corresponding to various sizes of the corner curved surface, which is a major disadvantage.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0035] Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

[0036] First, the cutting insert 1 and the cutting tool 3 according to the first embodiment will be described. Cutting inserts 1 such as Figure 1 ~ Figure 4 shown.

[0037]The cutting insert 1 has an upper surface 5 and a lower surface 7 facing or located on opposite sides of each other, and a peripheral side surface 9 extending therebetween. The upper surface 5 and the lower surface 7 are substantially parallel. An axis A passing through the upper surface 5 and the lower surface 7 is defined on the cutting insert 1 , and is shaped substantially rotationally symmetrically around the axis A. A blade mounting hole 11 having a central axis coincident with the axis A is formed through the upper surface 5 and the lower surface 7 .

[0038] The cutting insert 1 includes an insert body 13 and three protrusions 15 provided integrally with the insert body 13 . Th...

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PUM

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Abstract

One aspect of the invention provides a cutting insert (1) provided with an insert body (13), and multiple projections (15) integrally provided at external positions of the insert body (13). Each projection (15) comprises a cutting blade (23), a projection top surface, a projection bottom surface, two projection side surfaces, and a projection side end surface extending therebetween. A corner rounded surface (33) extending between the projection top surface and projection side end surface is formed on each projection (15). To provide corners formed along the edge of the corner rounded surface, and to enable the projection end surfaces to be cutting faces, each cutting blade (23) is formed along the ridgeline portions where the projection top surface, corner rounded surface and projection side end surface intersect with the projection side surfaces. The projections (15) are designed so that the length between two projection side surfaces (29) is shorter than the diameter (IC) of an incircle set out in the body top surface.

Description

technical field [0001] The present invention relates to a cutting insert and a cutting tool on which the cutting insert is mounted. In particular, the present invention relates to a vertical cutting insert used for grooving (grooving), and a cutting edge replaceable rotary cutting tool to which the cutting insert is detachably mounted. Background technique [0002] Conventionally, as one type of rotary cutting tools capable of grooving, there is a side milling cutter of a cutting edge exchange type. Generally speaking, in grooving, it is required to provide a corner rounding, that is, a corner curved surface composed of a curved surface, at the corner between the machined groove bottom of the material to be cut and the side wall surface connected thereto. This is because stress tends to concentrate between the bottom of the groove and the side wall surface, and if there is no corner curved surface, cracks are generated from the corner portion of the workpiece, and the workp...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23C5/20B23C5/08
CPCB23C2200/367B23C2210/66B23C2200/085B23C2220/36B23C5/20B23C5/205B23C5/207B23C2210/168B23C5/08B23C2200/0466Y10T407/235Y10T407/1906Y10T407/1942B23C5/202
Owner TUNGALOY CORP