| 摘要 |
The present invention relates to a type of diamond-containing elements capable of being mounted on all types of supports or "mountings". These diamond-containing elements are of a straight semicircular cylindrical shape. These semicircular cylindrical elements are manufactured by sintering, metallic bond, the latter being loaded with fine diamond powder for example 10 to 20 microns for certain elements, and other elements being manufactured in the same way, but with coarser diamond powder, for example 120 microns. The hardness of the metal bonds is optimised according to the diamond powder incorporated. These elements are mounted so as to alternate fine grains and coarse grains and are tangential with respect to the face of the mounting. They are held either by adhesive bonding or by vertical welding with respect to the axis of the mounting. The large radius of the straight semicircular cylinder must be tangential to the external diameter of the mounting. The wheel thus designed makes it possible to rough grind and grind down in one operation and to polish directly by virtue of the more substantial wear of the coarse grains. Application to the surface treatment of spherical, concave, convex or toric spectacle lenses and of lenses for precision optics.
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