US2940842A - Abrasive articles - Google Patents

Abrasive articles Download PDF

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Publication number
US2940842A
US2940842A US722625A US72262558A US2940842A US 2940842 A US2940842 A US 2940842A US 722625 A US722625 A US 722625A US 72262558 A US72262558 A US 72262558A US 2940842 A US2940842 A US 2940842A
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United States
Prior art keywords
bond
metal silicon
alloy
resin
abrasive
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Expired - Lifetime
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US722625A
Inventor
Donald G Phillips
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.)
PREC GRINDING WHEEL Co IN
PRECISION GRINDING WHEEL COMPANY Inc
Original Assignee
PREC GRINDING WHEEL Co IN
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Application filed by PREC GRINDING WHEEL Co IN filed Critical PREC GRINDING WHEEL Co IN
Priority to US722625A priority Critical patent/US2940842A/en
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Publication of US2940842A publication Critical patent/US2940842A/en
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Expired - Lifetime legal-status Critical Current

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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
    • B24D3/34—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents characterised by additives enhancing special physical properties, e.g. wear resistance, electric conductivity, self-cleaning properties
    • B24D3/342—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents characterised by additives enhancing special physical properties, e.g. wear resistance, electric conductivity, self-cleaning properties incorporated in the bonding agent
    • B24D3/344—Physical features of abrasive bodies, or sheets, e.g. abrasive surfaces of special nature; Abrasive bodies or sheets characterised by their constituents characterised by additives enhancing special physical properties, e.g. wear resistance, electric conductivity, self-cleaning properties incorporated in the bonding agent the bonding agent being organic

Definitions

  • This invention relates to abrasive articles and, more particularly, relates to grinding Wheels in which abrasive grains are held by an organic bond.
  • the primary object of this invention is to provide an active agent for an abrasive article which improves the quality of the bond and, hence, the quality of the abrasive article.
  • metal silicon alloys are alloys of silicon with iron, manganese, aluminum, chromium, nickel, vanadium, tungsten or zirconium.
  • the metal silicon alloy will preferably contain from about 40% to about 80% silicon by weight.
  • the preferred alloy is ferrosilicon.
  • the metal silicon alloy can, with excellent results, be incorporated in any conventional abrasive article, particularly grinding wheels, which have abrasive grains bonded together with an organic bond.
  • the abrasive article may contain abrasive grains such as, for example, grains of aluminum oxide or silicon carbide.
  • the organic bond for the abrasive grains may be any of the organic bonds well known for use in abrasive articles such as, for example, natural resins such as shellac, synthetic resins such as a melamine resin or a phenolic resin, e.g., phenolformaldehyde resin or phenolfurfural resin. natural rubber or synthetic rubber.
  • the organic bond will preferably be from 50% to 95% by volume, advantageously 70% to 90% by volume, of the bond mass, that is of the mass of the organic bond plus ingredients admixed with the bond such as fillers and including the abrasive grains.
  • the metal silicon alloy will be from about 5% to about 50%, preferably to 30% by volume of the bond mass.
  • the metal silicon alloy may be used without the addition of conventional fillers or any conventionally employed fillers such as, cryolite or lime, may be added if desired.
  • Abrasive articles in accordance with this invention are readily made by procedures well known to the art.
  • the bonding material in a finely divided dry form is admixed with the metal silicon filler and any other additives such as, additional fillers, and then added to the abrasive particles which have been previously wetted using a wetting agent such as a liquid phenoformaldehyde resin.
  • the thus formed batch is then thoroughly mixed. It may then be cold pressed, preheated and pressed, or hot pressed to the desired shape in a conventional press.
  • the formed articles are removed from the press and placed in an oven where the cure is efiected or completed.
  • Example I A portable grinding wheel having the following constituents is formed.
  • An abrasive article consisting essentially of abrasive grains, an organic bonding uniting the grains as an integral body and a metal silicon alloy dispersed throughout the bond mass, the metal silicon alloy containing from about 40% to about silicon by weight and being from about 5% to about 50% by volume of the bond mass, the metal silicon alloy being an alloy of silicon with a member selected from the group consisting of iron, manganese, aluminum, chromium, nickel, vanadium, tungsten and zirconium, and the organic bond being a member selected from the group consisting of a phenolic resin, a melamine resin, an aniline resin and rubber.
  • a grinding wheel in accordance with claim 1 characterized in that the organic bond is a phenolformaldehyde resin.
  • a grinding wheel in accordance with claim 1 characterized in that the metal silicon alloy is a ferrosilicon alloy.
  • a grinding wheel in accordance with claim 1 characterized in that the organic bond is a phenol formaldehyde resin and the metal silicon alloy is a ferrosilicon alloy.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Polishing Bodies And Polishing Tools (AREA)

Description

United States Patent ABRASIVE ARTICLES Donald G. Phillips, Hatboro, Pa., assignor to Precision Grinding Wheel Company, Incorporated, Philadelphia, Pa., a corporation of Maryland No Drawing. Filed Mar. 18, 1958, Ser. No. 722,625
Claims. (Cl. 51-298) This invention relates to abrasive articles and, more particularly, relates to grinding Wheels in which abrasive grains are held by an organic bond.
The primary object of this invention is to provide an active agent for an abrasive article which improves the quality of the bond and, hence, the quality of the abrasive article.
in accordance with this invention is has been found that the quality of an abrasive article employing an organic bond and particularly a grinding wheel employing such a bond can be materially improved by incorporating in the bond a metal silicon alloy preferably in a finely divided form. Exemplary of metal silicon alloys are alloys of silicon with iron, manganese, aluminum, chromium, nickel, vanadium, tungsten or zirconium. The metal silicon alloy will preferably contain from about 40% to about 80% silicon by weight. The preferred alloy is ferrosilicon.
The metal silicon alloy can, with excellent results, be incorporated in any conventional abrasive article, particularly grinding wheels, which have abrasive grains bonded together with an organic bond. For example, the abrasive article may contain abrasive grains such as, for example, grains of aluminum oxide or silicon carbide.
The organic bond for the abrasive grains may be any of the organic bonds well known for use in abrasive articles such as, for example, natural resins such as shellac, synthetic resins such as a melamine resin or a phenolic resin, e.g., phenolformaldehyde resin or phenolfurfural resin. natural rubber or synthetic rubber. The organic bond will preferably be from 50% to 95% by volume, advantageously 70% to 90% by volume, of the bond mass, that is of the mass of the organic bond plus ingredients admixed with the bond such as fillers and including the abrasive grains.
The metal silicon alloy will be from about 5% to about 50%, preferably to 30% by volume of the bond mass. The metal silicon alloy may be used without the addition of conventional fillers or any conventionally employed fillers such as, cryolite or lime, may be added if desired.
Abrasive articles in accordance with this invention, for example, grinding wheels, are readily made by procedures well known to the art. The bonding material in a finely divided dry form is admixed with the metal silicon filler and any other additives such as, additional fillers, and then added to the abrasive particles which have been previously wetted using a wetting agent such as a liquid phenoformaldehyde resin. The thus formed batch is then thoroughly mixed. It may then be cold pressed, preheated and pressed, or hot pressed to the desired shape in a conventional press. The formed articles are removed from the press and placed in an oven where the cure is efiected or completed.
The following specific examples, while not limiting, will further illustrate the invention.
Example I A portable grinding wheel having the following constituents is formed.
Percent by volume 30 grit aluminum oxide 48 Bond mass 43 Pore 9 the bond mass having the following make-up:
Percent by volume Phenolformaldehyde resin 54 Cryolite 20 Lime 3 Ferrosilicon alloy 23 Example II A grinding wheel having the following constituents is formed:
Percent by volume 60 grit silicon carbide 50 Bond mass ..f 27 Pore 23 the bond mass having the following make-up:
Percent by volume Analine-formaldehyde resin 62 Siliconmanganese alloy q 38 The dry bond mass is thoroughly mixed and then added to the abrasive particles which are previously wetted with a liquid furfural resin. This batch is thoroughly mixed and cold pressed to the desired shape of wheel. The wheel is then kept in an oven at 350 F. until cured.
What is claimed is:
1. An abrasive article consisting essentially of abrasive grains, an organic bonding uniting the grains as an integral body and a metal silicon alloy dispersed throughout the bond mass, the metal silicon alloy containing from about 40% to about silicon by weight and being from about 5% to about 50% by volume of the bond mass, the metal silicon alloy being an alloy of silicon with a member selected from the group consisting of iron, manganese, aluminum, chromium, nickel, vanadium, tungsten and zirconium, and the organic bond being a member selected from the group consisting of a phenolic resin, a melamine resin, an aniline resin and rubber.
2. A grinding wheel in accordance with claim 1 characterized in that the organic bond is a phenolformaldehyde resin.
3. A grinding wheel in accordance with claim 1 characterized in that the organic bond is an aniline formaldehyde resin.
4. A grinding wheel in accordance with claim 1 characterized in that the metal silicon alloy is a ferrosilicon alloy.
5. A grinding wheel in accordance with claim 1 characterized in that the organic bond is a phenol formaldehyde resin and the metal silicon alloy is a ferrosilicon alloy.
References Cited in the file of this patent UNITED STATES PATENTS 2,199,803 Light May 7, 1940 FOREIGN PATENTS 562,467 Great Britain July 3, 1944

Claims (1)

1. AN ABRASIVE ARTICLE CONSISTING ESSENTIALLY OF ABRASIVE GRAINS, AN ORGANIC BONDING UNITING THE GRAINS AS AN INTEGRAL BODY AND A METAL SILICON ALLOY DISPERSED THROUGHOUT THE BOND MASS, THE METAL SILICON ALLOY CONTAINING FROM ABOUT 40% TO ABOUT 80% SILICON BY WEIGHT AND BEING FROM ABOUT 5% TO ABOUT 50% BY VOLUME OF THE BOND MASS, THE METAL SILICON ALLOY BEING AN ALLOY OF SILICON WITH A MEMBER SELECTED FROM THE GROUP CONSISTING OF IRON, MANGANESE, ALUMINUM, CHROMIUM, NICKEL, VANADIUM, TUNGSTEN AND ZIRCONIUM, AND THE ORGANIC BOND BEING A MEMBER SELECTED FROM THE GROUP CONSISTING OF A PHENOLIC RESIN, A MELAMINE RESIN, AN ANILINE RESIN AND RUBBER.
US722625A 1958-03-18 1958-03-18 Abrasive articles Expired - Lifetime US2940842A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3032404A (en) * 1961-04-17 1962-05-01 Simonds Worden White Company Metal phosphide filler for grinding wheels
US3087803A (en) * 1960-07-05 1963-04-30 Federal Screw Works Diamond grinding wheel and compositions therefor
US3482791A (en) * 1967-11-20 1969-12-09 Norton Co Refiner plate
US3960517A (en) * 1974-10-23 1976-06-01 The New Registon Company, Limited Resinoid wheel containing a mixture of trimanganese tetraoxide and ferroxide and ferric oxide fillers

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2199803A (en) * 1939-04-27 1940-05-07 American Cyanamid Co Resin bonded electric resistor
GB562467A (en) * 1941-12-01 1944-07-03 Norton Grinding Wheel Co Ltd Abrasive wheels and method of making the same

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2199803A (en) * 1939-04-27 1940-05-07 American Cyanamid Co Resin bonded electric resistor
GB562467A (en) * 1941-12-01 1944-07-03 Norton Grinding Wheel Co Ltd Abrasive wheels and method of making the same

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3087803A (en) * 1960-07-05 1963-04-30 Federal Screw Works Diamond grinding wheel and compositions therefor
US3032404A (en) * 1961-04-17 1962-05-01 Simonds Worden White Company Metal phosphide filler for grinding wheels
US3482791A (en) * 1967-11-20 1969-12-09 Norton Co Refiner plate
US3960517A (en) * 1974-10-23 1976-06-01 The New Registon Company, Limited Resinoid wheel containing a mixture of trimanganese tetraoxide and ferroxide and ferric oxide fillers

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