Multi-lip drilling tool with internal cooling ducts
US-9636756-B2 · May 2, 2017 · US
Cutting tool
US11173553B2 · US · B2
| Field | Value |
|---|---|
| Publication number | US-11173553-B2 |
| Application number | US-201716300125-A |
| Country | US |
| Kind code | B2 |
| Filing date | Apr 19, 2017 |
| Priority date | May 19, 2016 |
| Publication date | Nov 16, 2021 |
| Grant date | Nov 16, 2021 |
How to read this patent
A practical reading order for non-experts. Skip the full description unless you need deep technical detail.
- Title
What the patent document calls the invention.
- Abstract
A short plain-language summary of the technical disclosure.
- Assignees and inventors
Who owns or filed the patent and who is credited as inventor.
- Key dates
Filing, priority, publication, and grant dates set the timeline.
- First independent claim
The legal scope of protection — read this for what is actually claimed.
- CPC / IPC classifications
Technology tags used to group this patent with similar filings.
- Citations and related patents
Prior art links and similar publications in this corpus.
Abstract
Official abstract text for this publication.
A cutting tool has a rake face and a flank face. The flank face is provided with a coolant supply hole. A ridgeline between the rake face and the flank face forms a cutting edge. An outer shape of the coolant supply hole in a cross section orthogonal to an axis includes a first portion facing the cutting edge, and a second portion opposite to the cutting edge when viewed from the first portion. The first portion has a concave portion extending toward the second portion. The concave portion is defined by a first side portion and a second side portion facing each other, and a bottom continuous with both the first side portion and the second side portion. In the cross section, an angle formed by a tangent of the first side portion and a tangent of the second side portion is not more than 160°.
First claim
Opening claim text (preview).
The invention claimed is: 1. A cutting tool configured to rotate around an axis, comprising: a rake face; and a flank face continuous with the rake face, wherein the flank face is provided with a coolant supply hole, a ridgeline between the rake face and the flank face forms a cutting edge, an outer shape of the coolant supply hole in a cross section orthogonal to the axis includes a first portion facing the cutting edge when viewed from a direction parallel to the axis, and a second portion opposite to the cutting edge when viewed from the first portion, the first portion has a concave portion extending toward the second portion, the concave portion is defined by a first side portion and a second side portion facing each other, and a bottom continuous with both the first side portion and the second side portion, in the cross section, an angle formed by a tangent of the first side portion and a tangent of the second side portion is not more than 160°, when viewed from the direction parallel to the axis, a direction parallel to a line connecting an outer peripheral end portion of the cutting edge and the axis is a first direction, and a direction perpendicular to the first direction is a second direction, a maximum dimension of the outer shape in the first direction is greater than a maximum dimension of the outer shape in the second direction, a dimension of the concave portion in the second direction is not less than 0.03 times and not more than 0.3 times the maximum dimension of the outer shape in the second direction, and in a cross section parallel to the axis, the rake face is tilted toward an opening of the coolant supply hole relative to a straight line parallel to the axis. 2. The cutting tool according to claim 1 , wherein the second portion has an outwardly convex shape. 3. The cutting tool according to claim 1 , wherein when viewed from the direction parallel to the axis, in the first direction parallel to a line connecting an outer peripheral end portion of the cutting edge and the axis, the outer shape has a portion decreasing in dimension in the second direction perpendicular to the first direction, from the axis toward the outer peripheral end portion. 4. The cutting tool according to claim 3 , wherein when viewed from the direction parallel to the axis, a maximum dimension of the outer shape in the first direction is greater than a dimension of the outer shape from the first portion to the second portion in the second direction. 5. The cutting tool according to claim 1 , wherein the outer shape has a first convex portion continuous with the first side portion, a second convex portion continuous with the second side portion, and a third convex portion continuous with both the first convex portion and the second convex portion, and the third convex portion extends opposite to the cutting edge when viewed from the bottom.
Assignees
Inventors
Classifications
- B23B51/0686Primary
Cross-sectional shape of coolant hole · CPC title
with lubricating or cooling equipment (B23B51/042 takes precedence) · CPC title
Coolant channel characterised by its cross-sectional shape · CPC title
Flutes, i.e. chip conveying grooves · CPC title
Curved cutting edges · CPC title
Patent family
Related publications grouped by family.
External sources
Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US11173553B2 cover?
- A cutting tool has a rake face and a flank face. The flank face is provided with a coolant supply hole. A ridgeline between the rake face and the flank face forms a cutting edge. An outer shape of the coolant supply hole in a cross section orthogonal to an axis includes a first portion facing the cutting edge, and a second portion opposite to the cutting edge when viewed from the first portion.…
- Who is the assignee on this patent?
- Sumitomo Electric Hardmetal Corp
- What technology area does this patent fall under?
- Primary CPC classification B23B51/0686. Mapped technology areas include Operations & Transport.
- When was this patent published?
- Publication date Tue Nov 16 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 6 related publications on this page (citations in our corpus or others sharing the same primary CPC).