Fixed abrasive articles and methods of forming same

• US 10,358,589 B2
• Filed: 02/26/2018
• Issued: 07/23/2019
• Est. Priority Date: 03/31/2015
• Status: Active Grant

• Current Assignee: Saint-Gobain Abrasives Incorporated (Compagnie De Saint-Gobain S.A.)
• Original Assignee: Saint-Gobain Abrasives Incorporated (Compagnie De Saint-Gobain S.A.)
• Inventors: Bujnowski, Adam P., McNeal, Kelley, Pacella, Nan Y., Rapaka, Srikanth, Rich, Joseph, Sahlin, Katherine M., Sarangi, Nilanjan, Schoch, Andrew B.
• Primary Examiner(s): Parvini, Pegah
• Application Number:
  US15/905,023
• Publication Number:
  US 20180187057A1
• Time in Patent Office: 512 Days
• CPC Class Codes: B24D 18/0009 using moulds or presses
• CPC Class Codes: B24D 2203/00 Tool surfaces formed with a pattern
• CPC Class Codes: B24D 3/02 the constituent being used as bonding agent
• CPC Class Codes: B24D 7/06 with inserted abrasive blocks, e.g. segmental
• CPC Class Codes: B29C 48/0022 combined with cutting
• CPC Class Codes: C09K 3/1409 Abrasive particles per se preparation of diamond C01B32/25

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.

Claims

1. A bonded 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,

wherein each of the shaped abrasive particles or elongated abrasive particles have a predetermined tilt angle,

wherein the abrasive particles comprise a first group of abrasive particles and a second group of abrasive particles, and

wherein an abrasive particle of the first group of abrasive particles is staggered relative to an abrasive particle of the second group of abrasive particles.

2. The bonded abrasive article of claim 1, wherein an abrasive particle of the first group of abrasive particles is radially staggered relative to an abrasive particle of the second group of abrasive particles.

3. The bonded abrasive article of claim 1, wherein an abrasive particle of the first group of abrasive particles is axially staggered relative to an abrasive particle of the second group of abrasive particles.

4. The bonded abrasive article of claim 1, wherein the first group of abrasive particles and the second group of abrasive particles are arranged in a controlled, non-shadowing arrangement.

5. The bonded abrasive article of claim 1, wherein the abrasive particles of the first group of abrasive particles have a first predetermined rotational orientation relative to a major surface of the body.

6. The bonded abrasive article of claim 5, wherein the abrasive particles of the second group of abrasive particles have a second predetermined rotational orientation relative to a major surface of the body.

7. The bonded abrasive article of claim 6, wherein the first predetermined rotational orientation is different from the second predetermined rotational orientation.

8. The bonded abrasive article of claim 1, wherein the abrasive particles of the first group of abrasive particles are positioned within a first radial plane of the body.

9. The bonded abrasive article of claim 8, wherein the abrasive particles of the second group of abrasive particles are positioned within a second radial plane of the body, the second radial plane being axially spaced apart from the first radial plane.

10. The bonded abrasive article of claim 9, wherein the first group of abrasive particles and the second group of abrasive particles utilizes a first distribution such that the abrasive particles of the second group are rotated relative to the abrasive particles of the first group and do not overlap when viewing the radial planes from the top-down.

11. The bonded abrasive article of claim 10, wherein the first distribution includes a two-dimensional array, a non-shadowing arrangement, a radial pattern, a spiral pattern, a phyllotactic pattern, an asymmetric pattern, a self-avoiding random distribution, or a combination thereof.

12. The bonded abrasive article of claim 1, wherein each of the shaped abrasive particles or elongated abrasive particles have a predetermined three-axis orientation relative to the major surface of the body.

13. The bonded abrasive article of claim 1, wherein each of the abrasive particles comprises a cutting tip or cutting edge having a predetermined rotational orientation relative to a major surface of the body.

14. The bonded abrasive article of claim 1, wherein the abrasive particles within the first group have a predetermined position having substantially the same axial position within a 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 a second radial plane with respect to each other.

15. The bonded abrasive article of claim 14, 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.

16. The bonded abrasive article of claim 1, wherein the abrasive particles of the first group of abrasive particles are arranged in a controlled distribution relative to each other and wherein the second group of abrasive particles are arranged in a controlled distribution relative to each other.

17. The bonded abrasive article of claim 1, wherein the abrasive particles of the first group have at least one abrasive characteristic that is different from the abrasive particles of the second group, 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.

18. The bonded abrasive article of claim 1, wherein each group of the first and second 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.

19. The bonded abrasive article of claim 1, wherein the predetermined tilt angle defines an angle between a normal axis extending normal to a major surface of the body and a longitudinal axis of the shaped abrasive particle or elongated abrasive particle.

20. The bonded abrasive article of claim 19, wherein the predetermined tilt angle is between 0 degrees and 88 degrees.