CA2562950A1 - Brazed diamond dressing tool - Google Patents

Brazed diamond dressing tool Download PDF

Info

Publication number
CA2562950A1
CA2562950A1 CA002562950A CA2562950A CA2562950A1 CA 2562950 A1 CA2562950 A1 CA 2562950A1 CA 002562950 A CA002562950 A CA 002562950A CA 2562950 A CA2562950 A CA 2562950A CA 2562950 A1 CA2562950 A1 CA 2562950A1
Authority
CA
Canada
Prior art keywords
extension
metal composition
superabrasive grains
shank
base
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002562950A
Other languages
French (fr)
Other versions
CA2562950C (en
Inventor
Richard M. Andrews
Sergej-Tomislav Buljan
Earl G. Geary Jr.
Robert L. Owen
Marcus R. Skeem
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Saint Gobain Abrasives Inc
Original Assignee
Saint-Gobain Abrasives, Inc.
Richard M. Andrews
Sergej-Tomislav Buljan
Earl G. Geary Jr.
Robert L. Owen
Marcus R. Skeem
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Saint-Gobain Abrasives, Inc., Richard M. Andrews, Sergej-Tomislav Buljan, Earl G. Geary Jr., Robert L. Owen, Marcus R. Skeem filed Critical Saint-Gobain Abrasives, Inc.
Publication of CA2562950A1 publication Critical patent/CA2562950A1/en
Application granted granted Critical
Publication of CA2562950C publication Critical patent/CA2562950C/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D3/00—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents
    • B24D3/02—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent
    • B24D3/04—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent and being essentially inorganic
    • B24D3/06—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents the constituent being used as bonding agent and being essentially inorganic metallic or mixture of metals with ceramic materials, e.g. hard metals, "cermets", cements
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D18/00—Manufacture of grinding tools or other grinding devices, e.g. wheels, not otherwise provided for

Abstract

A dressing blade for finishing and reconditioning new and used abrasive grinding and cutting tools has a slab-shaped shank with an extension protruding longitudinally from the shank. Superabrasive grains are disposed on the surface of the extension and held in place by a brazed metal composition.
This composition is formed by brazing a powdered mixture of brazing metal components and active metal components. Specific extension configurations are provided which allow aligning the Superabrasive grains in single layer arrangement for precise dressing and simple fabrication of the tool. The novel dressing tool exhibits excellent wear characteristics.

Claims (35)

1. A dressing blade for conditioning abrasive tools comprising (i) a slab-shaped metal shank defining a flat base and a flat top parallel to the base and having an extension protruding longitudinally from an end of the shank, (ii) superabrasive grains and (iii) a brazed metal composition operative to chemically bond the superabrasive grains to the extension, wherein the brazed metal composition is a thermally densified mass comprising a brazing metal component and an active metal component, and wherein the superabrasive grains are uniformly dispersed within the brazed metal composition and are in a single layer in contact with each adjacent grain.
2. The dressing blade of claim 1 wherein the superabrasive grains are selected from the group consisting of diamond grains, cubic boron nitride grains and mixtures thereof.
3. The dressing blade of claim 2 wherein the superabrasive grains are diamond grains.
4. The dressing blade of claim 1 wherein the active metal component is selected from the group consisting of titanium, zirconium, chromium, hafnium, and their hydrides, and alloys and combinations thereof.
5. The dressing blade of claim 4 wherein the active metal component is titanium or a hydride thereof.
6. The dressing blade of claim 1 wherein the brazing metal component comprises metals selected from the group consisting of copper, silver, tin, zirconium, silicon and iron.
7. The dressing blade of claim 1 wherein the brazing metal component comprises copper and tin.
8. The dressing blade of claim 5 wherein the brazing metal component comprises copper and tin.
9. The dressing blade of claim 5 wherein the brazed metal composition comprises about 50-90 wt.% copper, about 5-35 wt.% tin and about 5-15 wt.% of titanium or a hydride thereof.
10. The dressing blade of claim 9 wherein the brazed metal composition comprises about 50-80 wt.% copper, about 15-25 wt.% tin and about 5-15 wt.% of titanium or a hydride thereof.
11. The dressing blade of claim 1 wherein the brazed metal composition comprises about 70 wt.% copper, about 21 wt.% tin and about 9 wt.% titanium or a hydride thereof.
12. A dressing blade for conditioning abrasive tools comprising (i) a slab-shaped metal shank defining a flat base and a flat top parallel to the base and having a metal extension protruding longitudinally from an end of the shank, (ii) and an abrasive portion comprising superabrasive grains and a brazed metal composition operative to bond the superabrasive grains to the extension, wherein the extension is a flat sheet having one side flush with the base and the opposite side defining a flat face, and in which the superabrasive grains are uniformly dispersed within the brazed metal composition, positioned adjacent to the flat face and are in a single layer such that each grain is in lateral contact with each adjacent grain.
13. The dressing blade of claim 12 wherein all the superabrasive grains are about the same size having a characteristic diameter, and the superabrasive grains and brazed metal composition define an abrasive layer having a thickness of less than two characteristic diameters.
14. The dressing tool of claim 12 wherein the blade further comprises a pair of side panels each of which panels is positioned at opposite lateral sides of the extension to define a single channel therebetween adapted to contain the superabrasive grains and the brazed metal composition.
15. The dressing blade of claim 14 wherein the side panels have a height extending from the base to the top of the shame along their full lengths.
16. The dressing blade of claim 14 wherein the side panels have a height extending from the base to below the top of the shank along a portion of their lengths.
17. The dressing blade of claim 16 wherein the extension further comprises an end panel positioned at an extremity of the extension longitudinally distant from the shank such that the end panel, the side panels and shank define a single tray therebetween adapted to contain the superabrasive grains and brazed metal composition.
18. A dressing blade for conditioning abrasive tools comprising (i) a slab-shaped metal shank defining a flat base and a flat top parallel to the base and having a metal extension protruding longitudinally from an end of the shank, (ii) and an abrasive portion comprising superabrasive grains and a brazed metal composition operative to bond the superabrasive grains to the extension, wherein the superabrasive grains are uniformly dispersed within the brazed metal composition and are in a single layer in contact with each adjacent grain and wherein the extension comprises a plurality of elongated flat walls parallel to each other and perpendicular to the base of the shank to form elongated alleys between consecutive walls, and in which the superabrasive grains and brazed metal composition are positioned in the alleys.
19. The dressing blade of claim 18 wherein all the superabrasive grains are about the same size defined by a characteristic diameter and the walls have a height less than two characteristic diameters.
20. The dressing blade of claim 19 wherein the walls are laterally spaced apart by a distance less than two characteristic diameters and the superabrasive grains within each alley are aligned in a single row extending longitudinally from the shank.
21. The dressing blade of claim 18 wherein the extension further comprises a flat sheet having one side flush with the base and in which the walls extend from the opposite side of the flat sheet.
22. The dressing blade of claim 18 wherein the extension further comprises a plurality of flat sheets extending longitudinally from the shank, the sheets being alternately aligned flush with the top and the base and extending between pairs of walls to form an orthogonal serpentine lateral cross section, thereby enclosing the superabrasive grains and brazed metal composition of laterally successive alleys alternately at planes flush with the base and with the top of the shank.
23. The dressing blade of claim 1 wherein the brazed metal composition further comprises a plurality of particles of a hard component other than diamond and having a Rockwell C hardness of at least about 1000 Knoop.
24. The dressing blade of claim 23 wherein the hard component is a compound selected from the group consisting of tungsten carbide, titanium boride, silicon carbide, aluminum oxide, chromium boride, chromium carbide and combinations thereof.
25. The dressing blade of claim 1 wherein the brazed metal composition further comprises an infiltrant component operative to eliminate all porosity of the brazed metal composition.
26. The dressing blade of claim 1 wherein the extension is a flat sheet having one side flush with the base and the opposite side defining a flat face, and in which the superabrasive grains are positioned adjacent to the flat face, and wherein the brazed metal composition comprises about 50-90 wt.% copper, about 5-35 wt.% tin and about 5-15 wt.% of titanium or a hydride thereof.
27. The dressing blade of claim 26 wherein the extension further comprises a pair of side panels each of which panels is positioned at opposite lateral sides of the extension to define a single channel therebetween adapted to contain the superabrasive grains and the brazed metal composition, and wherein the brazed metal composition comprises about 50-90 wt.% copper, about 5-35 wt.% tin and about 5-15 wt.% of titanium or a hydride thereof.
28. The dressing blade of claim 1 wherein the extension comprises a plurality of flat walls parallel to each other and perpendicular to the base of the shank to form elongated alleys between consecutive walls, wherein the superabrasive grains and brazed metal composition are positioned in the alleys, and wherein the brazed metal composition comprises about 50-90 wt.% copper, about 5-35 wt.% tin and about 5-wt.% of titanium or a hydride thereof.
29. A method for preparing a dressing blade for conditioning abrasive tools comprising:
a) providing a slab-shaped metal shank defining a flat base and a flat top parallel to the base and having an extension protruding longitudinally from an end of the shank;
b) applying to the extension a layer of brazing metal composition comprising a brazing metal component and an active metal component;

c) pressing superabrasive grains into the paste to form a single layer of superabrasive grains in lateral contact with each other to obtain a blade precursor; and d) heating the blade precursor to liquefy the brazing metal composition and create a bond between the components of the brazing metal composition and the superabrasive grams.
30. The method of claim 29 wherein the extension comprises a flat sheet having one side flush with the base and the opposite side defining a flat face.
31. The method of claim 30 wherein the extension further comprises a pair of side panels each of which panels is positioned at opposite lateral sides of the extension to define a single channel therebetween adapted to contain the superabrasive grains and the brazed metal composition.
32. The method of claim 31 wherein the extension further comprises an end panel positioned at an extremity of the blade longitudinally distant from the shank such that the end panel, the side panels and shank define a single tray therebetween adapted to contain the superabrasive grains and brazed metal composition.
33. The method of claim 29 wherein the extension comprises a plurality of flat walls parallel to each other and perpendicular to the base of the shank to form elongated alleys between consecutive walls, and in which the superabrasive grains and brazed metal composition are positioned in the alleys.
34. The method of claim 33 wherein the extension further comprises a flat sheet having one side flush with the base and in which the walls extend from the opposite side of the flat sheet.
35. The method of claim 33 wherein the extension further comprises a plurality of flat sheets extending longitudinally from the shank, the sheets being alternately aligned flush with the top and the base and extending between pairs of walls to form an orthogonal serpentine lateral cross section, thereby enclosing the superabrasive grains and brazed metal composition of laterally successive alleys alternately at planes flush with the base and with the top of the shank.
CA2562950A 2004-05-18 2005-04-25 Brazed diamond dressing tool Active CA2562950C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US10/847,939 US20050260939A1 (en) 2004-05-18 2004-05-18 Brazed diamond dressing tool
US10/847,939 2004-05-18
PCT/US2005/014060 WO2005123341A1 (en) 2004-05-18 2005-04-25 Brazed diamond dressing tool

Publications (2)

Publication Number Publication Date
CA2562950A1 true CA2562950A1 (en) 2005-12-29
CA2562950C CA2562950C (en) 2010-04-13

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Family Applications (1)

Application Number Title Priority Date Filing Date
CA2562950A Active CA2562950C (en) 2004-05-18 2005-04-25 Brazed diamond dressing tool

Country Status (15)

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US (2) US20050260939A1 (en)
JP (1) JP2007537890A (en)
CN (1) CN1953843B (en)
AT (1) AT503766B1 (en)
BR (1) BRPI0511246A (en)
CA (1) CA2562950C (en)
CH (1) CH703798B1 (en)
DE (1) DE112005001119B4 (en)
ES (1) ES2299397B2 (en)
FR (1) FR2870472B1 (en)
GB (1) GB2428243B (en)
IT (1) ITMI20050843A1 (en)
MX (1) MXPA06013406A (en)
SE (1) SE0602424L (en)
WO (1) WO2005123341A1 (en)

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US20050260939A1 (en) 2005-11-24
DE112005001119T5 (en) 2009-11-19
GB2428243A (en) 2007-01-24
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GB0621133D0 (en) 2006-12-13
JP2007537890A (en) 2007-12-27
FR2870472B1 (en) 2006-11-24
CH703798B1 (en) 2012-03-30
ES2299397A1 (en) 2008-05-16
AT503766B1 (en) 2011-03-15
CN1953843A (en) 2007-04-25
CN1953843B (en) 2012-09-19
CA2562950C (en) 2010-04-13
US20080076338A1 (en) 2008-03-27
DE112005001119B4 (en) 2012-02-23
SE0602424L (en) 2007-01-16
ITMI20050843A1 (en) 2005-11-19
AT503766A2 (en) 2007-12-15
FR2870472A1 (en) 2005-11-25
WO2005123341A1 (en) 2005-12-29
ES2299397B2 (en) 2009-09-11
US8795034B2 (en) 2014-08-05
GB2428243B (en) 2007-11-28
AT503766A5 (en) 2011-03-15
MXPA06013406A (en) 2007-01-23

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