Stone working – Turning – Grinding-wheel dressing
Patent
1975-08-11
1977-04-19
Whitehead, Harold D.
Stone working
Turning
Grinding-wheel dressing
51 33R, B24B 5304
Patent
active
040182061
ABSTRACT:
This machine is designed for dressing fixed-super-abrasive tools employed in the grinding and polishing of optical and ophthalmic lenses having a toric surface configuration. It comprises a base with an upstanding frame having an arm pivotally supported thereon for at least limited vertical arc-like oscillatory movement about the horizontal axis. A workpiece holder assembly suitable for holding the fixed-super-abrasive tool is releasably securable to the arm and movable along the arm to any predetermined position relative to the horizontal axis whereby the workpiece in the workpiece holder assembly is vertically oscillated at a preselected radius. The base also includes a grinder support bed both horizontally movable with respect thereto and controllably rotatable about a vertical axis through at least a limited horizontal arc. A powered, fast wearing, conventional abrasive grinding wheel rotatable about a vertical axis is upstandingly supported on the grinder support bed and disposed to traverse adjacent the workpiece holder assembly in an arc-like movement as the grinder support bed controllably oscillates, whereby the toric surface of the vertically-oscillating workpiece is dressed by the horizontally-oscillating grinding wheel.
REFERENCES:
patent: 2373882 (1945-04-01), Eglinton
patent: 2633675 (1953-04-01), Ellis
patent: 2634557 (1953-04-01), Seidner
patent: 2965162 (1960-12-01), Hawkinson
Dolido John
Highberg Carle W.
Engelhard Minerals & Chemicals Corporation
Whitehead Harold D.
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