Rotary tool

Patent metadata

Field	Value
Publication number	US-10493536-B2
Application number	US-201615773263-A
Country	US
Kind code	B2
Filing date	Sep 7, 2016
Priority date	Nov 26, 2015
Publication date	Dec 3, 2019
Grant date	Dec 3, 2019

Abstract

There is provided a rotary tool including a rotary tool body and a blade provided to the rotary tool body and having a cutting edge, the blade containing 80% by volume or more of diamond, and the blade including a land surface extending along the cutting edge, and a chip breaker having a recess located opposite to the cutting edge with the land surface therebetween.

First claim

The invention claimed is:

1. A rotary tool comprising:
a rotary tool body; and
a blade provided to the rotary tool body and having a cutting edge,
the blade containing 80% by volume or more of diamond, and
the blade comprising a land surface extending along the cutting edge, and a chip breaker having a recess located opposite to the cutting edge with the land surface therebetween,
wherein the land surface has a width in a range of 10 μm or more and 100 μm or less,
wherein the recess has a maximum depth in a range of 60 μm or more and 300 μm or less.

2. The rotary tool according to claim 1 , wherein the diamond is a single crystal diamond.

3. The rotary tool according to claim 2 , wherein the single crystal diamond has an absorption coefficient in a range of 2 cm −1 or more and 90 cm −1 or less for laser light of 190 nm or more and 11000 nm or less in wavelength.

4. The rotary tool according to claim 1 , wherein the recess has a side surface having a rake face that recedes continuously as a distance thereof from the land surface increases in magnitude and that has a shape identical to that of a portion of a side surface of a shape of a body of revolution.

5. A rotary tool comprising:
a rotary tool body; and
a blade provided to the rotary tool body and having a cutting edge,
the blade containing 80% by volume or more of diamond, and
the blade comprising a land surface extending along the cutting edge, and a chip breaker having a recess located opposite to the cutting edge with the land surface therebetween,
wherein the rotary tool body has an external shape in the form of a column generally extending in its axial direction, and has a groove formed from a tip end portion of the rotary tool body to an intermediate portion thereof,
wherein the blade is accommodated in a notch provided at the locations of the tip end and intermediate portions of the groove facing a peripheral surface of the rotary tool body,
wherein the land surface has a width in a range of 10 μm or more and 100 μm or less,
wherein the recess has a maximum depth in a range of 60 μm or more and 300 μm or less.

6. The rotary tool according to claim 5 , wherein the diamond is a single crystal diamond.

7. The rotary tool according to claim 6 , wherein the single crystal diamond has an absorption coefficient in a range of 2 cm −1 or more and 90 cm −1 or less for laser light of 190 nm or more and 11000 nm or less in wavelength.

8. The rotary tool according to claim 5 , wherein the recess has a side surface having a rake face that recedes continuously as a distance thereof from the land surface increases in magnitude and that has a shape identical to that of a portion of a side surface of a shape of a body of revolution.

Assignees

• Sumitomo Electric Hardmetal Corp

Inventors

• Harada Gaku
• Kanada Yasuyuki
• Shimanuki Kouji

Classifications

• B23D2277/26

  Means for breaking chips · CPC title

• B23D77/00

  Reaming tools · CPC title

• B23B2226/31

  Diamond · CPC title

• B23B51/00 Primary

  Tools for drilling machines · CPC title

• B23C5/16

  characterised by physical features other than shape · CPC title