Inside/outside chucking device
OwnerDonald R. Maxam, Allen B. Maxaminventors
Life of this patent
Estimating the term…
Abstract
For selective outside or inside chucking of a workpiece on a lathe use is made of a base unit split to provide a set of three or more holding segments capable of being either contracted for grasping the exterior of a workpiece or spread for grasping the interior of a workpiece. There is a set of jaws complementary with respect to the segments and designed to accommodate a workpiece of selected size. Each individual jaw in turn is mounted on one of the holding segments with an attachment permitting removal of the jaw for replacement with one of the jaws of a different set for holding a workpiece of different size.
Claims13
A workpiece holding device for a lathe wherein the lathe is provided with a collet actuating unit and accompanying spindle, said workpiece holding device comprising a base unit having a shank adapted to be mounted on said spindle and a set of radially movable elements comprising a plurality of circumferentially disposed individual segments of said shank, said segments being subject to movement between workpiece holding and workpiece releasing postures for both inside and outside engagement with a workpiece, a set of work-holding members having one workpiece capability, said set of workpiece holding members comprising a separate jaw for each segment, each jaw and corresponding segment comprising a workpiece engaging assembly, and removable means of attachment between each jaw and the respective segment, a separate actuator element for said base unit having a range of alternative axial movement outwardly and inwardly relative to the collet actuating unit and accompanying spindle and an actuating engagement with said workpiece engaging assembly, and means on said actuator element for providing an attachment to said collet actuating unit, each jaw being removable from the respective segment for replacement with a jaw of another set of workpiece holding members which has another workpiece engaging capability, a cam structure on the interior of said set of segments having a cam track thereon and a cam on said actuator positioned for engagement with said cam track in a direction effecting radially inward movement of said workpiece engaging assemblies whereby said jaws engage in a radially inwardly direction against said workpiece.
A workpiece holding device for a lathe wherein the lathe is provided with a collet actuating unit and accompanying spindle, said workpiece holding device comprising a base unit having a shank adapted to be mounted on said spindle and a set of radially movable elements comprising a plurality of circumferentially disposed individual segments on said shank, said segments being subject to movement between workpiece holding and workpiece releasing postures, a set of work-holding members having one workpiece capability, said set of workpiece holding members comprising a separate jaw for each segment, each jaw and corresponding segment comprising a workpiece engaging assembly, and removable means of attachment between each jaw and the respective segment, an actuator having an actuating engagement with said workpiece engaging assembly, and means on said actuator for providing a driven engagement with said collet actuating unit, each jaw being removable from the respective segment for replacement with a jaw of another set of workpiece holding members which has another workpiece engaging capability, there being a cam structure on the interior of said set of segments having cam tracks thereon positioned in opposite directions and a plurality of said actuators, one of said actuators having a cam thereon positioned for engagement with one of said cam tracks in a direction effecting radially inward movement of said workpiece engaging assemblies whereby said jaws engage radially inwardly against said workpiece, another of said actuators having a cam thereon positioned for engagement with another of said cam tracks in a direction effecting radially outward movement of said workpiece engaging assemblies whereby said jaws alternatively engage in a radially outward direction against said workpiece.
Dependencies are inferred from the claim text.