Method of making a segmented cup grinding wheel

Claim 1

A method of making an abrasive cup grinding wheel tool having a working portion bonded to a support, the working portion comprising a plurality of segments positioned adjacent one another and bonded to said support, and having abrasive particles held therein in a bonding matrix, the method comprising the steps of mixing a plurality of needle-shaped abrasive particles taken from the group consisting of diamonds and cubic boron nitride, each having a long axis and a short transverse axis wherein the ratio of the long axis to the short axis thereof is at least about 3:1 with a resin bonding matrix, aligning a substantial portion of said particles with their longitudinal axes substantially normal to the face of said segment, partially curing said bonding matrix, positioning a plurality of said segments in said support, and causing the bonding matrix to be completely cured to thereby bond adjacent segments to each other and to the support.

Claim 2

A method of making an abrasive cup grinding wheel tool having a working portion bonded to a support, the working portion comprising a plurality of segments positioned adjacent one another and bonded to said support, and having abrasive particles held therein in a bonding matrix, the method comprising the steps of mixing a plurality of needle-shaped abrasive particles taken from the group consisting of diamonds and cubic boron nitride, each having a long axis and a short transverse axis wherein the ratio of the long axis to the short axis thereof is at least about 3:1 with a resin bonding matrix, aligning a substantial portion of said particles with their longitudinal axes substantially normal to the face of said segment, partially curing said bonding matrix, positioning a plurality of said segments in said support, and causing the bonding matrix to be completely cured to thereby bond adjacent segments to each other and to the support.

Claim 3

A method of making an abrasive cup grinding tool having a working portion bonded to a support, the working portion comprising abrasive particles held in a bonding matrix, the method comprising the steps of making a segment for use in the working portion of the abrasive cup grinding wheel by mixing a plurality of needle-shaped abrasive particles taken from a group consisting of diamonds and cubic boron nitride, each having a long axis and a short transverse axis, wherein the ratio of the long axis to the short axis thereof is at least about 3:1, with a resin bonding matrix; aligning a substantial portion of said particles with their long axes substantially normal to the face of said segment which provides a working surface of said grinding wheel; partially curing the matrix to hold the particles therein; positioning a plurality of said segments in said support; and causing the bonding matrix to be completely cured to thereby bond adjacent segments to one another and to the support.

Claim 4

A method of making an abrasive cup grinding tool having a working portion bonded to a support, the working portion comprising abrasive particles held in a bonding matrix, the method comprising the steps of making a segment for use in the working portion of the abrasive cup grinding wheel by mixing a plurality of needle-shaped abrasive particles taken from a group consisting of diamonds and cubic boron nitride, each having a long axis and a short transverse axis, wherein the ratio of the long axis to the short axis thereof is at least about 3:1, with a resin bonding matrix; aligning a substantial portion of said particles with their long axes substantially normal to the face of said segment which provides a working surface of said grinding wheel; partially curing the matrix to hold the particles therein; positioning a plurality of said segments in said support; and causing the bonding matrix to be completely cured to thereby bond adjacent segments to one another and to the support.

Claim 5

A method of making an abrasive grinding tool having a working portion bonded to a support, the working portion comprising abrasive particles held in a bonding matrix the method comprising the steps of making a segment for use in the working portion of the abrasive grinding wheel by mixing a plurality of needle-shaped abrasive particles taken from a group consisting of diamonds and cubic boron nitride, each having a long axis and a short transverse axis, wherein the ratio of the long axis to the short axis thereof is at least about 3:1, with a resin bonding matrix, aligning a substantial portion of said particles with their long axes substantially normal to the face of said segment which provides a working surface of said grinding wheel and partially curing the matrix to hold the particles therein; positioning a plurality of said segments in said support; and causing the bonding matrix to be completely cured to thereby bond adjacent segments to one another and to the support.

Claim 6

A method of making an abrasive grinding tool having a working portion bonded to a support, the working portion comprising abrasive particles held in a bonding matrix the method comprising the steps of making a segment for use in the working portion of the abrasive grinding wheel by mixing a plurality of needle-shaped abrasive particles taken from a group consisting of diamonds and cubic boron nitride, each having a long axis and a short transverse axis, wherein the ratio of the long axis to the short axis thereof is at least about 3:1, with a resin bonding matrix, aligning a substantial portion of said particles with their long axes substantially normal to the face of said segment which provides a working surface of said grinding wheel and partially curing the matrix to hold the particles therein; positioning a plurality of said segments in said support; and causing the bonding matrix to be completely cured to thereby bond adjacent segments to one another and to the support.