Porous abrasive tool and method for making the same

Details Porous abrasive tool and method for making the same Porous abrasive tool and method for making the same

B - Operations, Transporting

24

D

B24D 3/00 (2006.01) B24D 99/00 (2010.01) B23F 21/03 (2006.01) B24D 5/06 (2006.01) B24D 18/00 (2006.01) C09K 3/14 (2006.01)

Patent

CA 2463137

An abrasive article including from about 40 to about 80 volume percent interconnected porosity, the article being useful as a segment for a segmented grinding wheel, and a method for fabricating the same. The method includes blending a mixture of abrasive grain, bond material and dispersoid particles, the mixture including from about 40 to about 80 volume percent dispersoid particles. In one embodiment the mixture includes from about 50 to about 80 volume percent dispersoid particles. In another embodiment the mixture includes an organic bond material and from about 40 to about 80 volume percent dispersoid particles. The powder mixture is then pressed into an abrasive laden composite and thermally processed. After cooling the composite is immersed into a solvent, which dissolves substantially all of the dispersoid particles, leaving a highly porous, bonded abrasive article.

Cette invention concerne un outil comprenant de 40 à 80 % environ en volume de pores interconnectés, convenant bien comme segment pour une meule segmentée, ainsi qu'un procédé de fabrication. Ce procédé consiste à réaliser un mélange de grains abrasifs, de matériau de liaison et de particules dispersoïdes, lesquelles constituent entre 40 et 80 % environ du mélange en volume. Dans un mode de réalisation, le mélange comprend en volume de 50 à 80 % environ de particules dispersoïdes. Dans un autre mode de réalisation, le mélange comprend un matériau de liaison organique et entre 40 et 80 % environ de particules dispersoïdes. Le mélange en poudre est ensuite comprimé sous forme de composite chargé d'abrasifs et soumis à un traitement thermique. Après refroidissement, le composite est immergé dans un solvant, lequel solvant dissout sensiblement la totalité des particules dispersoïdes pour ne laisser qu'un article abrasif lié à forte porosité.

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