Abrasive article having abrasive segments with shaped gullet walls

Patent metadata

Field	Value
Publication number	US-10046437-B2
Application number	US-201614987098-A
Country	US
Kind code	B2
Filing date	Jan 4, 2016
Priority date	Dec 31, 2012
Publication date	Aug 14, 2018
Grant date	Aug 14, 2018

Abstract

A segment for an abrasive article is disclosed. The segment can include a segment body that can have a first face that can extend along a length of the segment body on a first side of the segment body and a second face that can extend along the length of the segment body on a second side of the segment body opposite the first side. A gullet wall can extend from the first face to the second face. The gullet wall can extend along a gullet. The segment can also include a recessed region that can extend into one or both of the first and second faces. The recessed region can include a gullet portion extending at least partially along the gullet wall.

First claim

What is claimed is:

1. An abrasive article comprising:
a core having an outer circumferential core wall; and
a plurality of segments extending radially outward from the outer circumferential core wall of the core, each segment comprising a body including:
a leading end and a trailing end;
a first face extending along a length of the body between the leading and trailing ends, a second face extending along the length of the body between the leading and trailing ends opposite the first face, and a thickness, T, extending between the first face and the second face;
an outer circumferential segment wall opposite an inner circumferential segment wall, the outer and inner circumferential segment walls extending between the first and second faces and between the leading trailing ends;
a first recessed region extending into the first face a depth, D 1 , wherein D 1 is less than T; and
an intra-segment gullet bound by a gullet wall that extends from the first face to the second face and extends at least partially into the first recessed region, wherein the intra-segment gullet extends from the outer circumferential segment wall toward the inner circumferential segment wall a depth D G , D G being less than H, a height of the body measured between the inner and outer circumferential segment walls,

wherein:
at least two of the segments are spaced apart by an inter-segment gullet including a first portion, a second portion, and a third potion, wherein:
the first portion extends inward in a first direction from an outer periphery of the abrasive article between the at least two of the segments and to the second portion;
the second portion extends from the outer circumferential wall of the core into the core at a second direction different from the first direction; and
the third portion extends from the second portion in a third direction and further into the core, the third direction being different from the second direction.

2. The abrasive article of claim 1 , wherein the intra-segment gullet bisects at least a portion of the first recessed region.

3. The abrasive article of claim 1 , wherein the first recessed region extends into the body a depth, D 1 , wherein the body of the segment has a thickness, T, and wherein D 1 is no greater than 0.3 T.

4. The abrasive article of claim 1 , wherein the first recessed region comprises a bilateral recessed region including a first recessed region extending into the first face and a second recessed region extending into the second face opposite the first recessed region.

5. The abrasive article of claim 1 , wherein the first recessed region is spaced apart from the outer circumferential wall.

6. The abrasive article of claim 1 , wherein the first face has a surface roughness, R 1 , and a face of the first recessed region has a surface roughness, R 2 , and wherein R 2 is less than R 1 .

7. An abrasive segment comprising:
a body comprising:
a leading end and a trailing end;
a first face extending between the leading and trailing ends;
a second face opposite the first face, the second face extending between the leading and trailing ends;
a thickness, T, measured between the first and second faces;
a first recessed region extending into the first face a depth, D 1 , wherein D 1 is smaller than T;
an inner circumferential segment wall extending between the first and second faces and between the leading and trailing ends;
an outer circumferential segment wall extending between the first and second faces and between the leading and trailing ends, opposite the inner circumferential segment wall;
a height, H, measured between the inner and outer circumferential segment walls; and
an intra-segment gullet disposed between the leading and trailing ends and bound by a gullet wall extending from the first face to the second face and extending at least partially into the first recessed region, wherein the intra-segment gullet extends from the outer circumferential segment wall toward the inner circumferential segment wall a depth D G , D G being less than H.

8. The abrasive segment of claim 7 , wherein the first recessed region comprises a bilateral recessed region including a first recessed region extending into the first face and a second recessed region extending into the second face opposite the first recessed region, and wherein the first recessed region and the second recessed region are mirror opposite of each other.

9. The abrasive segment of claim 8 , wherein the first and second recessed regions extend equal depths into the body.

10. The abrasive segment of claim 7 , wherein the abrasive segment further comprises a second recessed region adjacent to the trailing end.

11. The abrasive segment of claim 10 , wherein the second recessed region comprises a bilateral recessed region including a first recessed region extending into the first face and a second recessed region extending into the second face opposite the first recessed region.

12. The abrasive segment of claim 7 , wherein the first face has a surface roughness, R 1 , and a face of the first recessed region has a surface roughness, R 2 , and wherein R 2 is less than R 1 .

13. The abrasive segment of claim 7 , wherein the intra-segment gullet bisects at least a portion of the first recessed region.

14. A method of making an abrasive article comprising:
forming a plurality of green segments each having a body comprising:
a leading end and a trailing end;
a first face extending between the leading and trailing ends;
a second face opposite the first face extending between the leading and trailing ends; and
an outer circumferential segment wall opposite an inner circumferential segment wall, the outer and inner circumferential segment walls extending between the first and second faces and between the leading and trailing ends;

treating the plurality of green segments to form a plurality of abrasive segments; and
attaching the plurality of abrasive segments to a core such that an inter-segment gullet is disposed between at least two of the plurality of abrasive segments, wherein:
the inter-segment gullet includes a first portion, a second portion, and a third potion, wherein:
the first portion extends inward in a first direction from an outer periphery of the abrasive article between the at least two of the plurality of abrasive segments and to the second portion;
the second portion extends from an outer circumference of the core into the core at a second direction different from the first direction; and
the third portion extends from the second portion in a third direction and further into the core, the third direction being different from the second direction; and

each segment includes:
a thickness, T, extending between the first and second faces;
a first recessed region extending into the body a depth, D 1 , wherein D 1 is less than T; and
an intra-segment gullet bound by a gullet wall that extends from the first face to the second face and extends at least partially into the first recessed region, wherein the intra-segment gullet extends from the outer circumferential segment wall toward the inner circumferential segment wall a depth D G , D G being less than H, a height measured between the inner and outer circumferential segment walls.

15. The method of claim 14 , wherein forming the plurality of green segments comprises pressing each green segment in a mold.

16. The method of claim 14 , wherein treating the plurality of green segment comprises curing or sintering.

17. The method of claim 14 , wherein attaching the plurality of abrasiv

Assignees

• Saint Gobain Abrasives Inc
• Saint Gobain Abrasifs Sa

Inventors

• Hoang Marc Linh

Classifications

• B28D1/121

  Circular saw blades · CPC title

• B24D5/06 Primary

  with inserted abrasive blocks, e.g. segmental · CPC title

• B24D18/0009

  using moulds or presses · CPC title

• B24D5/12

  Cut-off wheels · CPC title

• B23D61/04

  with inserted saw teeth {, i.e. the teeth being individually inserted} · CPC title