Indexable cutting insert and indexable cutting insert holder

Patent metadata

Field	Value
Publication number	US-9457409-B2
Application number	US-201213985492-A
Country	US
Kind code	B2
Filing date	Mar 30, 2012
Priority date	Apr 8, 2011
Publication date	Oct 4, 2016
Grant date	Oct 4, 2016

Abstract

Indexable cutting insert with a plate-like main body having two parallel main surfaces and a peripheral surface connecting the two main surfaces and with a plurality of sections angled with respect to one another, wherein four cutting edges that extend transversely to the main surfaces are provided on the peripheral surface at the transition to sections, that are angled with respect to one another, of the peripheral surface, and wherein the position of the cutting edges defines a quadrilateral in the plan view of the main surfaces. Fixing with more favorable leverages and permanently more precise positioning of the cutting edges are provided by the quadrilateral having in each case two short and two long sides and cutting edges oriented in each case in opposite directions in the peripheral direction at adjacent corners and oriented in each case in the same direction at diagonally opposite corners of the quadrilateral.

First claim

The invention claimed is:

1. Indexable cutting insert for grooving or parting, comprising a plate-shaped main body with two parallel main surfaces and a peripheral surface joining the two main surfaces and comprising a plurality of sections that are angled with respect to one another,
wherein four cutting edges extending transversely to the main surfaces are provided on a peripheral surface on the transition of sections of the peripheral surface that are angled with respect to one another,
wherein in plan view of the main surfaces, the position of the cutting edges defines an imaginary quadrilateral,
wherein the imaginary quadrilateral has two short and two long sides,
wherein the cutting edges are oriented in each case, oppositely on adjacent corners of the imaginary quadrilateral in a peripheral direction and oriented in the same direction on diagonally opposite corners of the imaginary quadrilateral,
wherein sections extending along the shorter sides of the peripheral surface of the imaginary quadrilateral comprise a positioning notch that includes a concave-shaped portion with a radius, wherein the radius is smaller in a center of the positioning notch than a radius of a pin provided for engaging with the positioning notch, and
wherein cutting surfaces of cutting edges are oriented to face the adjacent long side of the imaginary quadrilateral and to turn away from the adjacent short side of the imaginary quadrilateral.

2. Indexable cutting insert according to claim 1 , wherein the cutting edges extend essentially normally to the main surfaces.

3. Indexable cutting insert according to claim 1 , wherein the cutting edges are curved at least in sections or are at an angle to the main surfaces.

4. Indexable cutting insert according to claim 1 , wherein the imaginary quadrilateral is a parallelogram.

5. Indexable cutting insert according to claim 4 , wherein the imaginary quadrilateral is a rectangle.

6. Indexable cutting insert according to claim 1 , wherein the aspect ratio of long to short sides of the imaginary quadrilateral is at least 1.1 and at most 5.

7. Indexable cutting insert according to claim 1 , wherein the aspect ratio of long to short sides of the imaginary quadrilateral is at least 1.2 and at most 2.

8. Indexable cutting insert according to claim 7 , wherein the aspect ratio of long to short sides of the imaginary quadrilateral is at most 1.5.

9. Indexable cutting insert according to claim 1 , wherein the ratio of the short sides of the imaginary quadrilateral to the thickness of the indexable cutting insert is at least 2 and at most 15.

10. Indexable cutting insert according to claim 9 , wherein the ratio of the short sides of the imaginary quadrilateral to the thickness of the indexable cutting insert is at least 3 and at most 10.

11. Indexable cutting insert according to claim 1 , wherein the sections of the peripheral surface extending along the long sides have two locating surfaces arranged at a distance from the nearest cutting edges and at a distance from one another.

12. Indexable cutting insert according to claim 1 , wherein the sections of the main surfaces opposite one another, and immediately adjoining a cutting edge, form front flanks, whose distance from one another, starting from the cutting edge and at a distance from it, is smaller than the length of the cutting edge measured normally to the main surfaces.

13. Indexable cutting insert according to claim 1 , wherein the main surfaces have a central, locating through-hole.

14. Indexable cutting insert according to claim 13 , wherein the indexable cutting insert comprises a central main part with a first plate thickness and the central locating hole, and four cutting tips of smaller thickness, on which the cutting edges with flanks and cutting surfaces are arranged.

15. Indexable cutting insert according to claim 13 , wherein the indexable cutting insert comprises a central main part with a first plate thickness and the central locating hole, and four cutting tips with cutting edges, wherein the main part has a smaller thickness than the cutting tips.

16. Indexable cutting insert holder for an indexable cutting insert according to claim 1 , including an insert pocket, which has a lateral surface and a recess adjoining the lateral surface with faces extending essentially normally to the lateral surface and angled relative to one another, wherein on one of the faces, a stop surface is provided, which is spaced from a corner defined by an imaginary point of intersection of the angled faces, and wherein the pin is provided on a second face, also at a distance from the corner.

17. Indexable cutting insert holder according to claim 16 , wherein the pin has a cylindrical surface.

18. Indexable cutting insert holder according to claim 16 , wherein a fixing hole passes through the lateral surface and wherein a distance from a point of the stop surface that is farthest from the supporting element to a nearest point of the supporting element is greater than a distance from the same points to a center of the fixing hole.

19. Indexable cutting insert holder according to claim 16 , wherein each of the faces of the recess has a plurality of mutually angled sections, one of which forms the stop surface, and wherein on an other face two sections form a projecting corner, on which the supporting element is arranged.

20. Indexable cutting insert according to claim 1 , wherein the sections extending along the shorter sides of the peripheral surface further comprise a flank of a first cutting tip and a flank of a second cutting tip and each of the flanks have a portion that projects over the shorter side of the imaginary quadrilateral that has a convex shape relative to the shorter side of the imaginary quadrilateral.

21. Indexable cutting insert according to claim 20 , wherein the positioning notch is located between the flank of the first cutting tip and the flank of the second cutting tip.

22. Combination comprising:
an indexable cutting insert for grooving or parting,
the indexable cutting insert including a plate-shaped main body with two parallel main surfaces and a peripheral surface joining the two main surfaces and comprising a plurality of sections that are angled with respect to one another, wherein four cutting edges extending transversely to the main surfaces are provided on a peripheral surface on the transition of sections of the peripheral surface that are angled with respect to one another,
wherein in plan view of the main surfaces, the position of the cutting edges defines an imaginary quadrilateral,
wherein the imaginary quadrilateral has two short and two long sides,
wherein the cutting edges are oriented in each case, oppositely on adjacent corners of the imaginary quadrilateral in a peripheral direction and oriented in the same direction on diagonally opposite corners of the imaginary quadrilateral,
wherein sections extending along the shorter sides of the peripheral surface of the imaginary quadrilateral comprise a positioning notch that includes a concave-shaped portion with a radius, and
wherein cutting surfaces of cutting edges are oriented to face the adjacent long side of the imaginary quadrilateral and to turn away from the adjacent short side of the imaginary quadrilateral; and

an indexable cutting insert holder,
the indexable cutting insert holder including an insert pocket, which has a lateral surface and a recess adjoining the lateral surface with faces extending essentially normal

Assignees

• Zeeb Rudi
• Bandura Christian
• Walter Ag

Inventors

• Zeeb Rudi
• Bandura Christian

Classifications

• Y10T407/23

  including tool having plural alternatively usable cutting edges · CPC title

• B23B2200/3627

  Indexing · CPC title

• Y10T407/2274

  Apertured tool · CPC title

• B23B27/04 Primary

  Cutting-off tools (B23B27/08 takes precedence {; toolholders for cutting-off inserts B23B29/043}) · CPC title

• B23B2205/12

  Seats for cutting inserts · CPC title