Tool holder

Claim 2

In a turning tool; shank means having an upwardly opening first pocket of substantial size formed therein at one end, a nest member having an upwardly opening second pocket formed therein for receiving a polygonal shim-insert combination with the insert lying on top of the shim while leaving the top face and at least a part of the periphery of the insert exposed, said second pocket having two angularly related surfaces that engage the insert and three angularly related surfaces that engage the shim, said nest member being of substantial size and loosely seated in said first pocket, a clamp member on the nest member having a portion overlying an insert in said second pocket and engaging two surfaces of said insert, said clamp member also having a portion overlying said nest member, a clamp pin extending through said clamp member and said nest member and into said shank means, a head on said clamp pin engaging the side of said clamp member which faces away from said nest member, a notch formed in said clamp pin and a cam rotatable in said shank means and having an eccentric region engaging said notch in said clamp pin and operable to urge said clamp pin in the axially downward direction in said shank means to cause said clamp member to clamp an insert in said second pocket while simultaneously clamping said nest member in said first pocket.

Claim 3

A turning tool according to claim 1 in which said first pocket includes an upwardly facing bottom wall which is inclined downwardly relative to the longitudinal axis of said shank means in the axially outward direction.

Claim 4

A turning tool according to claim 1 in which said clamp member has a first wall portion adapted for engaging one peripheral portion of an insert in said second pocket, and said second pocket having a second wall portion at an angle to said first wall portion adapted for engaging a second peripheral region of said insert.

Claim 5

A turning tool according to claim 1 in which said first pocket is open toward said one end of said shank means and toward one side of said shank means and toward the top of said shank means and is formed by an upwardly facing bottom wall and two side walls, saId walls being mutually perpendicular, said bottom wall being inclined to the longitudinal axis of said shank means, said nest member having walls engaging the respective walls of said first pocket, said second pocket having an upwardly facing bottom wall parallel to wall of said nest member which engages the said bottom wall of said first pocket.

Claim 6

A turning tool according to claim 1 in which said insert is polygonal when viewed in plan, said second pocket having one side wall portion for engaging a side wall of an insert therein and having a second side wall portion parallel to and spaced from said one side wall portion, said clamp member having a first side wall region at an angle to said one side wall of said second pocket for engaging another side wall of an insert in said second pocket, and a second side wall region on said clamp member facing away from said first side wall region thereof and parallel to and engaging said second side wall portion of said second pocket.

Claim 7

In a turning tool, especially for heavy duty turning; a tool shank adapted for being clamped in a tool support with one end projecting therefrom, means at said one end of said shank forming a pocket which opens upwardly and away from said shank, said pocket having an upwardly facing bottom surface and at least one planar side surface generally perpendicular to said bottom surface, said surfaces being adapted to engage the bottom and one side respectively of a cutting insert having parallel top and bottom faces and angularly related sides perpendicular to said faces, a clamp member receivable in said pocket and having a planar side surface engaging another side of the insert, cooperating cylindrical surfaces on said pocket and clamp member for locating said clamp member in said pocket with said side surfaces of said pocket and said clamp member angularly related, whereby a cutting insert of a predetermined size will locate in said pocket against the said side surfaces of the pocket and the clamp member with an edge of the insert remote from the clamp member exposed for engagement with work to be turned, a lip on said clamp member extending over the top face of an insert in the pocket, and clamping means connecting the clamp member to the shank and operable for clamping said clamp member against the top face of an insert in said pocket and for clamping said clamp member to said shank.

Claim 8

In a turning tool, especially for heavy duty turning; a tool shank adapted for being clamped in a tool support with one end projecting therefrom, means at said one end of said shank forming a pocket which opens upwardly and away from said shank, said pocket having an upwardly facing bottom surface and at least one planar side surface generally perpendicular to said bottom surface, said surfaces being adapted to engage the bottom and one side respectively of a cutting insert having parallel top and bottom faces and angularly related sides perpendicular to said faces, a clamp member receivable in said pocket and having a planar side surface engaging another side of the insert, cooperating cylindrical surfaces on said pocket and clamp member for locating said clamp member in said pocket with said side surfaces of said pocket and said clamp member angularly related, whereby a cutting insert of a predetermined size will locate in said pocket against the said side surfaces of the pocket and the clamp member with an edge of the insert remote from the clamp member exposed for engagement with work to be turned, a lip on said clamp member extending over the top face of an insert in the pocket, and clamping means connecting the clamp member to the shank and operable for clamping said clamp member against the top face of an insert in said pocket and for clamping said clamp member to said shank.