Apparatus for clamping an annular workpiece

Apparatus for clamping an annular workpiece during the machining of the workpiece in a machine tool, with clamping arms mounted in a clamping-chuck body, retractable and extendable in a clamping plane and defining a clamping circle and with a pressure-medium actuating device for the clamping arms. T...

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Bibliographic Details
Main Author WENGENROTH,KURT
Format Patent
LanguageEnglish
German
Published 19.02.1987
Edition4
Subjects
BORING
MACHINE TOOLS
METAL-WORKING NOT OTHERWISE PROVIDED FOR
PERFORMING OPERATIONS
TRANSPORTING
TURNING
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Summary:Apparatus for clamping an annular workpiece during the machining of the workpiece in a machine tool, with clamping arms mounted in a clamping-chuck body, retractable and extendable in a clamping plane and defining a clamping circle and with a pressure-medium actuating device for the clamping arms. The clamping arms have a toothing which cooperates with a counter-toothing on a driver. The pressure-medium actuating device arranged below the clamping plane actuates the driver by means of a piston axially movable relative to the clamping circle. The driver is designed as a pinion with a helical toothing corresponding to a helical toothing on the clamping arms. The pinion is arranged on an adjusting spindle which is mounted in the clamping-chuck body and is axially adjustable counter to a return spring and is also rotatable in the clamping-chuck body and which is guided beyond the clamping plane and is provided with a rotary drive at its upper end. Slipped on the adjusting spindle is a catch pinion, to which are assigned catch bolts mounted in an extension of the clamping-chuck body and loaded by release spring. The catch bolts can be fixed selectively in the catch position and in the release position by means of a stop ring adjustable on the clamping-chuck housing.
Bibliography:Application Number: DE19853529273