Additional, friction-wheel-driven grinding spindle for bevelling

Details Additional, friction-wheel-driven grinding spindle for bevelling Additional, friction-wheel-driven grinding spindle for bevelling

1997-10-24

1999-05-18

Eley, Timothy V.

Abrading

Machine

Rotary tool

451 43, 451 65, B24B5/00

Patent

active

059046139

ABSTRACT:
A spectacle lens edging machine which supports a lens for rotation on coaxial half shafts, a grinding spindle with an axis parallel to the lens shafts, the grinding spindle is movable radially and axially relative to the shafts and has a grinding wheel thereon for grinding the periphery of a lens. An additional friction wheel driven grinding spindle for beveling the edges of the spectacle lens arranged on the bearing housing for the spindle and so moves radially and axially with the spindle. The grinding tool rotates on an axis extending radially to the axis of the spectacle lens and to the grinding spindle. An angular drive for the additional grinding tool includes a first friction wheel at the main grinding spindle and having a groove in its periphery and a second friction wheel extending into the groove with play to either contact one flank of the groove or to be out of contact therewith. The work spindle for the tool being connected with the second friction wheel, and the work spindle being in a bearing housing which is pivoted around an axis perpendicular to the axis of the grinding spindle so that contact between the grinding tool and the spectacle lens brings the friction wheels into engagement to drive the tool to rotate for beveling the periphery of the lens.

REFERENCES:
patent: 5056270 (1991-10-01), Curcher
patent: 5363597 (1994-11-01), Gottschald et al.
patent: 5630746 (1997-05-01), Gottschald et al.

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