Square-shaped cutting insert having curved secondary and corner cutting edges, and rotary cutting tool
US-2019105718-A1 · Apr 11, 2019 · US
Cutting tool and manufacturing method thereof
US11052466B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11052466-B2 |
| Application number | US-201715763911-A |
| Country | US |
| Kind code | B2 |
| Filing date | Aug 24, 2017 |
| Priority date | Dec 26, 2016 |
| Publication date | Jul 6, 2021 |
| Grant date | Jul 6, 2021 |
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- Title
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Abstract
Official abstract text for this publication.
A cutting tool according to an aspect of the present disclosure includes a cutting edge portion which contains at least one of cubic boron nitride and polycrystalline diamond. The cutting edge portion includes a rake face, a flank face, and a cutting edge. The flank face is contiguous to the rake face. The cutting edge is provided as a ridge line between the rake face and the flank face. The radius of curvature of the cutting edge is 2 μm or more and 8 μm or less.
First claim
Opening claim text (preview).
The invention claimed is: 1. A cutting tool comprising a cutting edge portion which contains at least one of cubic boron nitride and polycrystalline diamond, the cutting edge portion including a rake face, a flank face contiguous to the rake face, and a cutting edge provided as a ridgeline between the rake face and the flank face, a radius of curvature of the cutting edge being 2 μm or more and 8 μm or less, wherein the rake face and flank face are contiguous to each other in a first direction, and the radius of curvature varies along a second direction intersecting the first direction. 2. The cutting tool according to claim 1 , wherein the arithmetic average roughness of the surface of the cutting edge is 0.05 μm or more and 2 μm or less. 3. The cutting tool according to claim 2 , wherein the arithmetic average roughness varies along the extending direction of the cutting edge. 4. The cutting tool according to claim 1 , wherein the cutting tool is an end mill, the cutting edge extends along a direction from a tip end of the cutting tool toward a shank thereof, the radius of curvature decreases along the direction from the tip end toward the shank. 5. A cutting tool comprising a cutting edge portion which contains at least one of cubic boron nitride and polycrystalline diamond, the cutting edge portion including a negative land, a flank face contiguous to the negative land, and a cutting edge provided as a ridgeline between the negative land and the flank face, a radius of curvature of the cutting edge being 2 μm or more and 8 μm or less, wherein the rake face and flank face are contiguous to each other in a first direction, and the radius of curvature varies along a second direction intersecting the first direction. 6. The cutting tool according to claim 5 , wherein the arithmetic average roughness of the surface of the cutting edge is 0.05 μm or more and 2 μm or less. 7. The cutting tool according to claim 6 , wherein the arithmetic average roughness varies along the extending direction of the cutting edge. 8. The cutting tool according to claim 5 , wherein the cutting tool is an end mill, the cutting edge extends along a direction from a tip end of the cutting tool toward a shank thereof, the radius of curvature decreases along the direction from the tip end toward the shank.
Assignees
Inventors
Classifications
Plate-like cutting inserts with special form (special form related to securing of the insert B23C5/22) · CPC title
- B23B27/20Primary
with diamond bits {or cutting inserts} · CPC title
characterised by the shape of the cutter · CPC title
- B23B27/145Primary
characterised by having a special shape · CPC title
Shank-type cutters, i.e. with an integral shaft · CPC title
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Frequently asked questions
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- What does patent US11052466B2 cover?
- A cutting tool according to an aspect of the present disclosure includes a cutting edge portion which contains at least one of cubic boron nitride and polycrystalline diamond. The cutting edge portion includes a rake face, a flank face, and a cutting edge. The flank face is contiguous to the rake face. The cutting edge is provided as a ridge line between the rake face and the flank face. The ra…
- Who is the assignee on this patent?
- Sumitomo Electric Hardmetal Corp
- What technology area does this patent fall under?
- Primary CPC classification B23B27/20. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Jul 06 2021 00:00:00 GMT+0000 (Coordinated Universal Time) (B2). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 7 related publications on this page (citations in our corpus or others sharing the same primary CPC).