Fixed abrasive articles and methods of forming same

Patent metadata

Field	Value
Publication number	US-12264277-B2
Application number	US-202217822244-A
Country	US
Kind code	B2
Filing date	Aug 25, 2022
Priority date	Mar 31, 2015
Publication date	Apr 1, 2025
Grant date	Apr 1, 2025

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 comprising a cylindrical shape comprising an upper surface, a bottom surface, a side surface extending between the upper surface and the bottom surface, and a central opening, defining a three-dimensional volume of the body;
the body having abrasive particles contained within the three-dimensional volume of the body by a bond material extending throughout the three-dimensional volume of the body, 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 have a predetermined position or a predetermined three-axis orientation;
wherein the plurality of shaped abrasive particles comprise a first radial set of shaped abrasive particles spaced at a first radial distance from a center of the body;
wherein the plurality of shaped abrasive particles comprises a second radial set of shaped abrasive particles spaced at a second radial distance from a center of the body that is different than the first radial distance;
wherein the shaped abrasive particles of the first radial set have a predetermined rotational orientation different than the shaped abrasive particles of the second radial set.

2. The fixed abrasive article of claim 1 , wherein the body comprises at least one reinforcing member, wherein the reinforcing member is selected from a group consisting of a woven material, a non-woven material, a composite material, a laminated material, a monolithic material, a natural material, a synthetic material, and a combination thereof.

3. The fixed abrasive article of claim 1 , wherein at least a portion of the shaped abrasive particles or at least a portion of the elongated abrasive particles have substantially the same predetermined three-axis orientation relative to a side surface of the body.

4. The fixed abrasive article of claim 1 , wherein each of the abrasive particles of the first radial set of abrasive particles have substantially the same predetermined rotational orientation relative to each other.

5. The fixed abrasive article of claim 1 , wherein each of the abrasive particles of the first radial set of abrasive particles have substantially the same axial position with respect to each other, and are spaced at substantially the same first radial distance from the center of the body with respect to each other.

6. The fixed abrasive article of claim 1 , wherein the abrasive particles of the first radial set have at least one abrasive characteristic that is substantially the same, wherein the at least one abrasive characteristic is selected from the group consisting of hardness, composition, average particle size, average grain size, fracture toughness, two-dimensional shape, tip sharpness, tip angle, aspect ratio, and a combination thereof.

7. The fixed abrasive article of claim 4 , wherein at least two of the abrasive particles of the second radial set of abrasive particles have a different predetermined rotational orientation relative to each other.

8. The fixed abrasive article of claim 4 , wherein each of the abrasive particles of the second radial set of abrasive particles have substantially the same predetermined rotational orientation relative to a side surface of the body.

9. The fixed abrasive article of claim 1 , wherein the first radial set is positioned as initial abrasive elements configured to conduct initial material removal operations and the second radial set is positioned as a back-up abrasive element configured to conduct material removal operations after some portion of the first radial set is worn.

10. The fixed abrasive article of claim 1 , wherein the abrasive particles of the first radial set are closer to a side surface of the body than the abrasive particles of the second radial set.

11. The fixed abrasive article of claim 1 , wherein the abrasive particles of the first radial set intersect a side surface of the body and the abrasive particles of the second radial set are spaced a distance from the side surface.

12. The fixed abrasive article of claim 1 , wherein each of the abrasive particles of the second radial set of abrasive particles have substantially the same axial position with respect to each other, and are spaced at substantially the same second radial distance from the center of the body with respect to each other.

13. The fixed abrasive article of claim 1 , wherein the abrasive particles of the second radial set have at least one abrasive characteristic that is substantially the same, wherein the at least one abrasive characteristic is selected from the group consisting of hardness, composition, average particle size, average grain size, fracture toughness, two-dimensional shape, tip sharpness, tip angle, aspect ratio, and a combination thereof.

14. The fixed abrasive article of claim 1 , wherein each of the shaped abrasive particles or elongated abrasive particles have a predetermined rotational orientation angle relative to a 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 less than 90 degrees.

16. The fixed abrasive article of claim 1 , wherein the shaped abrasive particles or elongated abrasive particles have a longitudinal axis extending substantially parallel to a major surface of the body.

17. The fixed abrasive article of claim 1 , wherein at least a portion of the abrasive particles are coupled to an orientation structure extending throughout a portion of the bond material within the body.

18. The fixed abrasive article of claim 17 , wherein the orientation structure comprises a web, a woven material, a non-woven material, paper, fabric, a spunwoven material, a film, a laminate, a composite, a preform with regions sized to contain a shaped abrasive particle or elongated abrasive particle, and a combination thereof.

19. The fixed abrasive article of claim 17 , wherein the orientation structure is coupled to the abrasive particles and configured to control the predetermined rotational orientation of the abrasive particles within the body.

20. The fixed abrasive article of claim 1 , wherein the first and second radial sets form concentric rings of abrasive particles around the central opening.

21. The fixed abrasive article of claim 1 , wherein the body comprises a content of porosity of at least 0.5 vol % and not greater than 80 vol %.

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

• B24D2203/00

  Tool surfaces formed with a pattern · CPC title

• B24D18/0009 Primary

  using moulds or presses · CPC title

• B24D7/02

  Wheels in one piece · CPC title

• B24D5/12

  Cut-off wheels · CPC title

• B24D5/02

  Wheels in one piece · CPC title