Cutting insert for tooth cutters

Patent metadata

Field	Value
Publication number	US-9427812-B2
Application number	US-201213541824-A
Country	US
Kind code	B2
Filing date	Jul 5, 2012
Priority date	Jul 18, 2011
Publication date	Aug 30, 2016
Grant date	Aug 30, 2016

Abstract

A cutting insert for tooth cutters includes a substantially cuboid basic body. The basic body has two top surfaces on sides opposite each other. The basic body also has four circumferential surfaces which extend in each case from an edge portion of the one top surface to an edge portion of the other top surface. A cutting edge is formed at at least one transition from each circumferential surface to one of the top surfaces.

First claim

What is claimed is:

1. A cutting insert having a substantially cuboid basic body, which has two top surfaces on sides opposite each other and four substantially planar flank surfaces which extend in each case from an edge portion of the one top surface to an edge portion of the other top surface,
wherein a cutting edge is formed at an intersection with each substantially planar flank surface and at least one of the top surfaces, and
wherein a passage opening extends from the one top surface to the other top surface, and the top surfaces have a planar supporting portion with an inner periphery and an outer periphery, the inner periphery surrounds the passage opening and a non-planar surface portion corresponding to a surface of a truncated cone that extends radially outward from the outer periphery of the planar supporting portion to each cutting edge, and wherein the center axis of the truncated cone coincides with the center axis A of the passage opening and the non-planar surface portion is continuous in the circumferential direction with reference to the center axis of the cone, and
wherein the non-planar surface portion descends toward an associated cutting edge such that the associated cutting edge is curved.

2. The cutting insert as claimed in claim 1 , wherein the basic body has a cuboid base.

3. The cutting insert as claimed in claim 1 , wherein the cutting insert has a total of eight cutting edges.

4. The cutting insert as claimed in claim 1 , wherein the two top surfaces have in each case four edge portions of the same length, and wherein angles between two adjacent edge portions are the same in each case.

5. The cutting insert as claimed in claim 1 , wherein the non-planar surface portion is inclined at a maximum angle of approximately 5° in relation to a plane which is at a right angle to the center axis A of the passage opening.

6. The cutting insert as claimed in claim 1 , wherein the cutting edges have a radius within the range of between approximately 90 mm and approximately 500 mm.

7. The cutting insert as claimed in claim wherein the maximum angle is 3°.

8. The cutting insert as claimed in claim 1 , wherein the cutting edges are set back in relation to the associated flank surface by approximately 0.1 mm.

9. The cutting insert as claimed in claim 1 , wherein a bevel surface, which is aligned at an angle of 45° with respect to the flank surfaces, is provided between two adjacent cutting edges.

Assignees

• Gesell Reinhold Friedrich
• Schumann Rene
• Kennametal Inc

Inventors

• Gesell Reinhold Friedrich
• Schumann Rene

Classifications

• B23C5/202 Primary

  Plate-like cutting inserts with special form (special form related to securing of the insert B23C5/22) · CPC title

• B23C2220/36

  Production of grooves · CPC title

• B23C2200/203

  Curved cutting edges · CPC title

• B23C2200/125

  discontinuous · CPC title

• B23C2200/123

  curved · CPC title