Chuck and method of chucking
OwnerJohn A. Korson, Bruce W. Korsoninventors
Life of this patent
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Abstract
A chuck and methods of chucking or clamping a workpiece for multiple machining operations without requiring rechucking or repositioning of the workpiece employs an arcuate cradle for supporting the workpiece with an abuttment at one of its ends. The workpiece is slid along the cradle until one of its ends is stopped by the abuttment, and then a jaw is pivoted against the other end of the workpiece to securely clamp the workpiece under hydraulic force derived from a machining tool to which the chuck is attached.
Claims21
A chuck for holding a workpiece having a portion shaped like a circular arc that is less than 360 degrees, said chuck comprising a cradle portion having circular arcuate surface for supporting said workpiece, a stop member at one end of said cradle portion for abutting against one end of said workpiece when said workpiece is supported by said curcular arcuate surface, a jaw adjacent the other end of said cradle portion for clamping against the other end of said workpiece when said workpiece is supported by said circular arcuate surface, and means for moving said jaw into and out of contact with said other end of said workpiece.
A chuck for holding a workpiece having a portion shaped like a concave circular arc that is substantially less than 360 degrees and is unequal to 180 degrees, said workpiece having a projecting portion that extends beyond said arc, said chuck comprising a cradle portion having a concave circular arcuate surface for supporting said workpiece, said circular arcuate surface having a predetermined diameter, there being a circular bore of predetermined diameter through said chuck, with said chuck and said bore and said circular arcuate surface having coincident central axes, a stop member at one end of said cradle portion for abutting against one end of said workpiece when said workpiece is supported by said circular arcuate surface, said stop member extending generally radially of said circular arcuate surface, a pivoted jaw adjacent the other end of said cradle portion for clamping against the other end of said workpiece when said workpiece is supported by said circular arcuate surface, and means for pivoting said jaw into and out of contact with said other end of said workpiece comprising actuator means centered in said bore and movable axially in said bore, said actuator means having a cam surface comprising a plurality of rollers, said pivotable jaw being connected to rotatable shaft means that is centered on its axis of pivoting, said axis of pivoting being parallel to said central axes, said shaft means having a helical cam surface mating with said rollers, there being a slot in said arcuate surface of said crade portion for receiving said projecting portion of said workpiece, and spring clip means contacting said projecting portion in said slot for locating said workpiece in said chuck, and one edge of said workpiece extending beyond a terminal edge of said chuck, and an opposite edge of said workpiece extending beyond said circular arcuate surface into a chamber having a diameter larger than said diameter of said bore, whereby such opposed edges of said workpiece are exposed for machining.
A removable jaw for a chuck for holding a workpiece shaped like a circular arc that is less than 360 degrees comprising a circular arcuate cradle portion for supporting said workpiece, a stop member at one end of said cradle portion, said stop member having a rotatable pad for abutting against one end of said workpiece when said workpiece is supported by said cradle portion, a movable jaw adjacent the other end of said cradle portion, said movable jaw having a rotatable pad for clamping against the other end of said workpiece when said workpiece is supported by said cradle portion, whereby a workpiece can be securely held in said jaw between said rotatable pads when said ends are misaligned.
A method for stably holding during machining, a workpiece that includes a circular arcuate portion that is less than 360 degrees and has a concave surface and a convex surface, comprising the steps of supporting said convex surface on a concave circular arcuate cradle, sliding said convex surface along said arcuate cradle while said workpiece is supported by said arcuate cradle until one end of said workpiece contacts an abutment, and clamping said workpiece in said arcuate cradle by moving a jaw against the other end of said workpiece.
Dependencies are inferred from the claim text.