Fixed abrasive articles and methods of forming same

Patent metadata

Field	Value
Publication number	US-11472989-B2
Application number	US-201816225919-A
Country	US
Kind code	B2
Filing date	Dec 19, 2018
Priority date	Mar 31, 2015
Publication date	Oct 18, 2022
Grant date	Oct 18, 2022

Abstract

A fixed abrasive article having a body including abrasive particles contained within a bond material, the abrasive particles including shaped abrasive particles or elongated abrasive particles having an aspect ratio of length:width of at least 1.1:1, each of the shaped abrasive particles or elongated abrasive particles having a predetermined position or a predetermined three-axis orientation.

First claim

What is claimed is:

1. A fixed abrasive article comprising: a body having abrasive particles contained within a bond material, the abrasive particles including a plurality of shaped abrasive particles or elongated abrasive particles having an aspect ratio of length:width of at least 1.1:1, each of the shaped abrasive particles or elongated abrasive particles having a predetermined rotational orientation angle relative to a side surface of the body, wherein the predetermined rotational orientation is distinct from conventional abrasive articles having abrasive particles having a random orientation, is the angle between the longitudinal axis of the shaped abrasive particle or elongated abrasive particle and the radial axis in a plane defined by a length and a width of the shaped abrasive particle or elongated abrasive particle, and wherein at least 50% of the shaped abrasive particles or elongated abrasive particles of the total amount of abrasive particles have a rotational orientation of 0 degrees to about 50 degrees.

2. The fixed abrasive article of claim 1 , wherein each of the shaped abrasive particles or elongated abrasive particles have a predetermined position and a predetermined three-axis orientation.

3. The fixed abrasive article of claim 1 , wherein each of the shaped abrasive particles comprises a cutting tip or cutting edge having a predetermined rotational orientation relative to the side surface.

4. The fixed abrasive article of claim 1 , wherein the body comprises a first group of abrasive particles positioned within a first radial plane within the body, each of the abrasive particles of the first group having a predetermined rotational orientation within the first radial plane relative to the side surface of the body, and wherein the body comprises a second group of abrasive particles within a second radial plane within the body, each of the abrasive particles of the second group having a predetermined rotational orientation within the second radial plane relative to the side surface of the body.

5. The fixed abrasive article of claim 4 , wherein the abrasive particles of the first group of abrasive particles are arranged in a controlled distribution relative to each other and wherein a second group of abrasive particles are arranged in a controlled distribution relative to each other.

6. The fixed abrasive article of claim 5 , wherein the controlled distribution of at least one of the first group of abrasive particles and the second group of abrasive particles comprises a phyllotactic pattern.

7. The fixed abrasive article of claim 5 , wherein an abrasive particle of the first group of abrasive particles is radially and axially staggered relative to an abrasive particle of the second group of abrasive particles.

8. The fixed abrasive article of claim 4 , wherein the abrasive particles within the first group have a predetermined position having substantially the same axial position within the first radial plane with respect to each other and wherein the abrasive particles within the second group have a predetermined position having substantially the same axial position within the second radial plane with respect to each other.

9. The fixed abrasive article of claim 8 , wherein the abrasive particles of the first group comprise a different radial position with respect to each other and wherein the abrasive particles of the second group comprise a different radial position with respect to each other.

10. The fixed abrasive article of claim 4 , wherein the first radial plane and second radial plane are axially spaced apart from each other within the body.

11. The fixed abrasive article of claim 4 , wherein the first group of abrasive particles have a first predetermined rotational orientation and the second group of abrasive particles have a second predetermined rotational orientation different than the first predetermined rotational orientation.

12. The fixed abrasive article of claim 4 , wherein the abrasive particles of the first group and the second group have at least one abrasive characteristic that is different.

13. The fixed abrasive article of claim 1 , wherein the body comprises a plurality of groups of abrasive particles associated with a plurality of different radial planes within the body, and wherein each group of the plurality of groups of abrasive particles includes a plurality of radial sets of abrasive particles, wherein each of the radial sets are spaced at a different radial distance from a center of the body relative to each other.

14. The fixed abrasive article of claim 1 , wherein the body comprises a first axial collection of abrasive particles within a first axial plane within the body, each of the abrasive particles of the first axial collection having a predetermined rotational orientation relative to the side surface of the body, and wherein the body further comprises a second axial collection of abrasive particles within a second axial plane within the body that is different than the first axial plane, each of the abrasive particles of the second axial collection having a predetermined rotational orientation within the second axial plane relative to the side surface of the body.

15. The fixed abrasive article of claim 1 , wherein the predetermined rotational orientation angle defines an angle between a radial axis and a particle axis, wherein the predetermined rotational orientation angle is between about 0.1 degrees and about 90 degrees.

16. The fixed abrasive article of claim 1 , wherein the shaped abrasive particles or elongated abrasive particles have a predetermined lateral axis rotational orientation angle between about 0.1 degrees and about 90 degrees.

17. The fixed abrasive article of claim 1 , wherein not greater than 50% of the shaped abrasive particles or elongated abrasive particles of the total amount of abrasive particles have a rotational orientation of 60 degrees to about 90 degrees.

18. The fixed abrasive article of claim 1 , wherein at least 20% of the shaped abrasive particles or elongated abrasive particles of the total amount of abrasive particles have a rotational orientation of 0 degrees to 20 degrees.

19. The fixed abrasive article of claim 1 , wherein at least 30% of the shaped abrasive particles or elongated abrasive particles of the total amount of abrasive particles have a rotational orientation of 0 degrees to 30 degrees.

Assignees

• Saint Gobain Abrasives Inc
• Saint Gobain Abrasifs Sa

Inventors

• COLET Celine
• Gao Kuo
• RAPAKA Srikanth
• Rich Joseph R
• Sahlin Katherine M
• Sarangi Nilanjan
• Schoch Andrew B

Classifications

• B24D18/0009 Primary

  using moulds or presses · CPC title

• B24D5/02

  Wheels in one piece · CPC title

• C09K3/1409 Primary

  Abrasive particles per se (preparation of diamond C01B32/25) · CPC title

• B24D7/02

  Wheels in one piece · CPC title

• B24D2203/00

  Tool surfaces formed with a pattern · CPC title