Apparatus for machining, workpieces having curved surfaces, e.g.

Details Apparatus for machining, workpieces having curved surfaces, e.g. Apparatus for machining, workpieces having curved surfaces, e.g.

1979-04-16

1981-03-24

Whitehead, Harold D.

Abrasive tool making process, material, or composition

With carbohydrate or reaction product thereof

51124L, 51 58, B24B 1302

Patent

active

042571944

ABSTRACT:
Apparatus for machining, polishing and/or smoothing workpieces having curved surfaces such as optical or ophthalmic lenses. A bearing head maintains a tool against a workpiece. Pressure is applied by a pneumatic piston and cylinder unit for establishing contact pressure between the workpiece and the tool. An eccentric drive mechanism including a compound table generates relative displacement between the workpiece and the tool. The pneumatic piston and cylinder unit actually forms part of the tool holder spindle. The cylinder or piston rod of the unit is provided with a tool holder block mounting the tool and the other of the piston rod or cylinder is attached to the drive mechanism. The bearing head has a freely rotating position and a locked position preventing rotation.

REFERENCES:
patent: 1001410 (1911-08-01), Johnson
patent: 1460724 (1923-07-01), McGrath
patent: 1609963 (1926-12-01), Robinson
patent: 2303531 (1942-12-01), Eyster
patent: 2352146 (1944-06-01), De Senberg
patent: 2371303 (1945-03-01), Liebowitz
patent: 3389508 (1968-06-01), Suddarth
patent: 3782042 (1974-01-01), Strasbaugh
patent: 3900971 (1975-08-01), Brueck
patent: 3900972 (1975-08-01), Rupp
patent: 4143490 (1979-03-01), Wood

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