Grinding wheel for shaping flat glass
First Claim
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1. A grinding wheel, comprising:
- at least one abrasive portion comprising at least one metallic binder and diamonds distributed in the metallic binder,wherein the metallic binder comprises;
from 58 to 75% by weight of tungsten;
from 30 to 37% by weight of bronze, wherein the bronze comprises from 75 to 85% by weight of copper and from 15 to 25% by weight of tin;
from 0.5 to 5% by weight of chrome; and
from 0.5 to 5% by weight of nickel,wherein the metallic binder has a Rockwell B hardness of between 95 and 105, andwherein the diamonds have a size of between 75 and 95 μ
m and a concentration of between 2.2 ct/cm3 and 2.64 ct/cm3.
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Abstract
A grinding wheel is suited for shaping glass, notably glass that is less than or equal to 4 mm thick. This grinding wheel has at least one abrasive portion formed of at least one metal binder and of diamonds distributed in the binder. The binder has a Rockwell B hardness of between 95 and 105 and is tungsten-based. The diamonds have a size of between 75 and 95 μm and a concentration of between 2.2 ct/cm3 and 2.64 ct/cm3. Glass, in particular for shaping motor-vehicle glazing units, can be shaped with this grinding wheel, making it possible to achieve travel speeds greater than or equal to 30 m/min.
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Citations
11 Claims
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1. A grinding wheel, comprising:
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at least one abrasive portion comprising at least one metallic binder and diamonds distributed in the metallic binder, wherein the metallic binder comprises; from 58 to 75% by weight of tungsten; from 30 to 37% by weight of bronze, wherein the bronze comprises from 75 to 85% by weight of copper and from 15 to 25% by weight of tin; from 0.5 to 5% by weight of chrome; and from 0.5 to 5% by weight of nickel, wherein the metallic binder has a Rockwell B hardness of between 95 and 105, and wherein the diamonds have a size of between 75 and 95 μ
m and a concentration of between 2.2 ct/cm3 and 2.64 ct/cm3. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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Specification