Large diameter cutting tool

• US 9,138,869 B2
• Filed: 08/28/2013
• Issued: 09/22/2015
• Est. Priority Date: 08/28/2012
• Status: Active Grant

• Current Assignee: Saint-Gobain Abrasives Incorporated (Compagnie De Saint-Gobain), Saint-Gobain Abrasifs (Compagnie de Saint-Gobain SA)
• Original Assignee: Saint-Gobain Abrasives Incorporated (Compagnie De Saint-Gobain), Saint-Gobain Abrasifs (Compagnie de Saint-Gobain SA)
• Inventors: McNeal, Kelley, Deleuze, Charles, Schoch, Andrew B., Srinivasan, Siddharth
• Primary Examiner(s): Eley, Timothy V
• Application Number:
  US14/012,171
• Publication Number:
  US 20140073230A1
• Time in Patent Office: 755 Days
• Field of Search: 512/96, 512/97, 513/07, 451/526, 451/533, 451/541, 451/542, 451/544, 451/546
• US Class Current: 1/1
• CPC Class Codes: B24D 3/06 metallic or mixture of metals with ceramic materials, e.g. hard metals, "cermets", cements
• CPC Class Codes: B24D 3/30 for close-grained structure
• CPC Class Codes: B24D 3/342 incorporated in the bonding agent
• CPC Class Codes: B24D 3/346 utilised during polishing, or grinding operation
• CPC Class Codes: B24D 5/04 with reinforcing means
• CPC Class Codes: B24D 5/12 Cut-off wheels
• CPC Class Codes: B24D 5/123 having different cutting segments

Abstract

An abrasive cutting tool includes a body in a shape of a large diameter disk having an outer diameter of at least about 60 centimeters. The body has an aspect ratio defined as a ratio (D:T) between the outer diameter to an axial thickness of the body of at least about 10:1. The body includes an abrasive portion having a bond material and abrasive particles contained within the bond material. The abrasive portion also includes a first filler having iron and sulfur with an average particle size of not greater than about 40 microns. The body also includes a reinforcing member and a Thermal Adhesion Factor (TAF) of at least about 30%.

Claims

1. An abrasive cutting tool, comprising:

a body in a shape of a large diameter disk having an outer diameter of at least about 60 centimeters, and an aspect ratio defined as a ratio (D;

T) between the outer diameter to an axial thickness of the body of at least about 10;

1, and the body including an abrasive portion having;

a bond material;

abrasive particles contained within the bond material;

a first filler contained within the abrasive portion comprising iron and sulfur having an average particle size of not greater than about 40 microns;

wherein the body further comprises a reinforcing member; and

a Thermal Adhesion Factor (TAF) of at least about 30%.

2. The abrasive cutting tool of claim 1, wherein the TAF of the body is at least about 33%, and not greater than 100%.

3. The abrasive cutting tool of claim 1, wherein the body comprises a baseline Adhesion Value (AVb) of at least about 550 lbf, and not greater than about 800 lbf.

4. The abrasive cutting tool of claim 1, wherein the body comprises a thermal treatment Adhesion Value (AVtt) of at least about 150 lbf, and not greater than about 400 lbf.

5. The abrasive cutting tool of claim 1, wherein the body comprises not greater than about 8 vol % porosity for the total volume of the body.

6. The abrasive cutting tool of claim 1, wherein at an interface between the reinforcing member and the abrasive portion the body has a Maximum Porosity Index of less than about 150%.

7. The abrasive cutting tool of claim 1, wherein the body has an average area fraction porosity of not greater than about 16% at an interface with the reinforcing member.

8. The abrasive cutting tool of claim 1, wherein the reinforcing member comprises an opening that defines an open area of at least about 10 mm² within a major plane of the reinforcing member, wherein the opening defines an open area of not greater than about 20 mm² within a major plane of the reinforcing member.

9. The abrasive cutting tool of claim 1, wherein the reinforcing member comprises fiber bundles having a warp filament diameter of less than about 17 microns.

10. The abrasive cutting tool of claim 1, wherein the reinforcing member comprises a DSC enthalpy of reaction less than about 29 J/g.

11. The abrasive cutting tool of claim 1, wherein the reinforcing member comprises a DSC enthalpy of crystallization less than about 30 J/g.

12. The abrasive cutting tool of claim 1, wherein the abrasive particles comprise a first type of abrasive particle and a second type of abrasive particle different than the first type, wherein the first type of abrasive particle comprises brown fused alumina (BFA) wherein the abrasive particles comprise a coating, wherein the coating comprises iron oxide.

13. The abrasive cutting tool of claim 1, wherein the first filler comprises pyrite (FeS₂).

14. The abrasive cutting tool of claim 1, wherein the abrasive portion comprises a wetting liquid remnant including an aliphatic chain, wherein the abrasive portion comprises a wetting liquid remnant including cyclic organic molecules.

15. The abrasive cutting tool of claim 1, wherein the body comprises a tapered region extending circumferentially around a portion of a periphery of the body, wherein the tapered region extends through the entire circumference of the body, wherein the tapered region extends radially from a flat region of the body, wherein the tapered region of the body comprises an average thickness that is greater than an average thickness of the flat region of the body, wherein the body comprises a central opening extending through a thickness of the body.

16. The abrasive cutting tool of claim 1, wherein the abrasive particles comprise brown fused alumina (BFA) having a hardness not greater than about 20 GPa and at least about 15.5 GPa.

17. The abrasive cutting tool of claim 1, wherein the abrasive particles comprise brown fused alumina (BFA) having a friability of not greater than about 70%, and at least about 20%.

18. The abrasive cutting tool of claim 1, wherein the bond material comprises resin, and the resin is at least about 40 vol % of a total volume of the bond material, and not greater than about 90 vol %.

19. The abrasive cutting tool of claim 1, wherein the bond material comprises a resin having a high temperature flexure modulus of at least 1.05, wherein the bond material comprises a resin having an increasing high temperature flexural modulus.

20. The abrasive cutting tool of claim 1, wherein the bond material is at least about 40 vol % and not greater than about 50 vol % of a total volume of the body.

21. The abrasive cutting tool of claim 1, wherein the TAF of the body is at least about 39%, and not greater than 75%.