Adjustable cutting or boring tool
OwnerDragisa Krstovicinventor
Life of this patent
Estimating the term…
Abstract
Tool includes a plurality of circumferentially spaced radially extending guideways in an end face thereof for receipt of a corresponding number of cutting tool holders. The radial inner ends of the holders have cam followers thereon which are urged radially inwardly by spring members into engagement with one or more correspondingly tapered cam surfaces on a central pusher element. The pusher element is supported for axial movement within a longitudinal bore in the cutting tool and is precisely axially movable in opposite directions to cause precise radial inward and outward movement of the tool holders within such guideways.
Claims20
A cutting tool comprising a cutting head having a generally radially extending end face at one end, a central opening extending longitudinally into said cutting head from said end face, a plurality of circumferentially spaced guideways in said end face extending radially from the outer periphery of said cutting head to said central opening, each said guideway having a cutting tool holder mounted for radial movement therein, pusher means mounted for axial movement in said central opening into engagement with the radial inner ends of said cutting tool holders to cause simultaneous radial outward movement of said cutting tool holders, and means for moving said pusher means axially within said central opening, said means for moving said pusher means axially within said central opening comprising a pusher shaft extending axially inwardly from said pusher means, means for rotating said pusher shaft in said central opening, and means for causing axial movement of said pusher means in response to such rotation of said pusher shaft, said means for rotating said pusher shaft comprising a first bevel gear keyed to said pusher shaft, and a second bevel gear extending at right angles to said first bevel gear and in meshing engagement therewith, said second bevel gear being accessible for rotation through a radial opening in said cutting head, and a pilot member in said central opening surrounding said pusher shaft, said pilot member being secured in place within said central opening and having a flat face on one side which provides a bearing support for said second bevel gear.
A cutting tool comprising a cutting head having a generally radially extending end face at one end, a central opening extending longitudinally into said cutting head from said end face, a plurality of circumferentially spaced guideways in said end face extending radially from the outer periphery of said cutting head to said central opening, each said guideway having a cutting tool holder mounted for radial movement therein, pusher means mounted for axial movement in said central opening into engagement with the radial inner ends of said cutting tool holders to cause simultaneous radial outward movement of said cutting tool holders, and means for moving said pusher means axially within said central opening, said means for moving said pusher means axially within said central opening comprising a pusher shaft extending axially inwardly from said pusher means, means for rotating said pusher shaft in said central opening, and means for causing axial movement of said pusher means in response to such rotation of said pusher shaft, said means for rotating said pusher shaft comprising a first bevel gear keyed to said pusher shaft, and a second bevel gear extending at right angles to said first bevel gear and in meshing engagement therewith, said second bevel gear being accessible for rotation through a radial opening in said cutting head, and a stepped bore at the axial inner end of said central opening, said pusher shaft having a radial flange thereon which is closely slidably received in said stepped bore for supporting said pusher shaft coaxially within said central opening, said stepped bore having a thrust shoulder adjacent the axial inner end thereof which is engaged by said radial flange for absorbing axial thrust loads.
A cutting tool comprising a cutting head, a plurality of circumferentially spaced cutting tool holders mounted for radial movement relative to said cutting head, pusher means mounted for axial movement in said cutting head into engagement with the radial inner ends of said cutting tool holders to cause simultaneous radial outward movement of said cutting tool holders, and means for moving said pusher means axially within said cutting head, said means for moving said pusher means axially comprising a pusher shaft extending axially inwardly from said pusher means, means for rotating said pusher shaft, and means for causing axial movement of said pusher means in response to rotation of said pusher shaft, said means for rotating said pusher shaft comprising a first bevel gear keyed to said pusher shaft, and a second bevel gear extending at right angles to said first bevel gear and in meshing engagement therewith, said second bevel gear being accessible for rotation through a radial opening in said cutting head, a pilot member in said cutting head surrounding said pusher shaft, said pilot member having a flat face on one side which provides a bearing support for said second bevel gear, and a post on said flat face for receipt of said second bevel gear thereon.
Dependencies are inferred from the claim text.