Claims
- 1. A grinding wheel made up of abrasive grain and a bond therefore, said wheel having a lower side surface and an upper side surface, said wheel being adapted to grind on its lower side surface with said upper side surface being attachable to a wheel mounting plate, wherein the improvement comprises:
- an upper section and a lower section, said lower section constituting a grinding section composed of abrasive grain and a bond therefore, said upper section being composed of particles that are selected from the class consisting of particles that are less abrasive and finer in particle size than the abrasive grain in said lower section, and wherein at least two threaded nuts and at least two depressions of substantial radial dimension are molded into the upper section, said threaded nuts being means for attaching said grinding wheel by bolts which pass through the wheel mounting plate, and said depressions being a means for driving the wheel by mating with matching lugs on the wheel mounting plate.
- 2. The grinding wheel of claim 1 wherein said bond is an organic polymer based bond and may include fillers and grinding aids.
- 3. The grinding wheel of claim 1 wherein said bond is a vitrified bond and may include fillers and grinding aids.
- 4. A grinding wheel according to any one of claims 1, 2 or 3 wherein the abrasive grain is selected from the group consisting of sintered alumina, sintered alumina-zirconia, silicon carbide, fused alumina, fused alumina-zirconia, cubic boron nitride, diamond and mixtures thereof.
- 5. The grinding wheel of claim 1 wherein said wheel has the following volume percent composition:
- ______________________________________abrasive grain 20-70resin or vitrified bond 2-60filler 0-50porosity 0-60______________________________________
- 6. The grinding wheel of claim 1 wherein the particles in said upper section are selected from the group consisting of glass fibers, oganic fibers, crushed nut shells, wood chips and mixtures thereof and said bond is an organic polymer based bond.
- 7. The grinding wheel of claim 1 wherein said particles in said upper section are selected from the group consisting of steel, iron, copper, aluminum, kyanite, andalusite, wallastonite, mullite, garnet, quartz, fluorite, mica, nephaline syenite, barium sulfate, calcium carbonate, cryolite, sintered alumina, sintered alumina-zirconia, silicon carbide, fused alumina, fused alumina-zirconia, and mixtures thereof.
- 8. The grinding wheel of claim 7 wherein the bond in said upper and lower sections is an organic polymer based bond.
- 9. The grinding wheel of claim 7 wherein the bond in said upper and lower sections is a vitreous bond.
- 10. The grinding wheel of claim 1 wherein the upper section thereof has the following volume percent composition:
- ______________________________________less abrasive and/or finer particles 20-70resin or vitreous bond 2-60filler 0-50porosity 0-60______________________________________ and the average particle size of said less abrasive and/or finer particles is from 44 to 4000 microns.
- 11. The grinding wheel of claim 1 wherein the lower section thereof has the following volume percent composition:
- ______________________________________abrasive grain 20-70Resin or vitrified bond 2-60filler 0-50porosity 0-60______________________________________ and the average particle size of said abrasive grain is from 100 to 4000 microns.
- 12. The grinding wheel according to any one of claims 1, 6, 7, 8, 9, 10 or 11 wherein the abrasive grain in said lower section is one selected from the group consisting of sintered alumina, sintered alumina-zirconia, silicon carbide, fused alumina, fused alumina-zirconia, cubic boron nitride, diamond, and mixtures thereof.
Parent Case Info
This is a continuation-in-part application of original application Ser. No. 07/192/423 filed May 10, 1988 now abandoned.
US Referenced Citations (11)
Foreign Referenced Citations (1)
Number |
Date |
Country |
1045842 |
Dec 1958 |
DEX |
Continuation in Parts (1)
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Number |
Date |
Country |
Parent |
192423 |
May 1988 |
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