Mounting apparatus for indexable cutting inserts

Claim 2

A milling cutter comprising a body having at least one cavity therein open to the periphery of said body and having at least one insert abutment means and at least one wedging surface therein, a milling insert having a first surface in abutment with said at least one abutment means, a cutting edge, and a holding means thereon, and a wedging means in abutment with said wedging surface and said milling insert and including means for fixing said wedging means within said cavity and means for generating a positive locking force between said wedging means and said insert holding means along an axis which intersects said insert holding means at a location thereon offset from the center thereof to prevent removal of said insert from said cavity regardless of the direction of movement of said body.

Claim 3

The milling cutter of claim 1 wherein said holding means in said insert comprises a cup formed with a continuous abutment surface and said force generating means comprises screw means which may be threaded through said wedging means and into contact with the abutment surface of said cup to positively retain said insert in said cavity.

Claim 4

The milling cutter of claim 1 wherein said fixing means and said force generating means comprise setscrew means oriented within said wedging means so that the axes thereof are in a common plane and said wedging means also includes a wedging surface so formed as to exert a wedging force on said milling insert in one direction of movement when one of said screw means is rotated through said wedging means.

Claim 5

The milling insert of claim 1 wherein said fixing means and said force generating means comprise screw means oriented within said wedging means so that the axes thereof do not lie in a common plane and said wedging means also includes a wedging surface so formed as to exert a wedging force on said milling insert in a first direction of movement upon rotation of one of said screw means and in a second direction of movement upon rotation of the other of said screw means.

Claim 6

An indexable milling cutter comprising a rotatable body having a cavity for receiving a cutting insert and means for retaining a cutting insert within said cavity comprising a clamping block having means thereon for compressively wedging a cutting insert between said clamping block and a wall of said cavity, means for selectively moving said clamping block into and out of wedging relationship with a cutting insert in said cavity, and means for selectively positively locking a cutting insert within said cavity including means for contacting and holding a cutting insert by exerting an axially directed force thereagainst at a location offset from the center of the insert.

Claim 7

An indexable milling cutter comprising a rotatable body having a cavity for receiving a cutting insert and means for retaining a cutting insert within said cavity comprising a clamping block having means thereon for compressively wedging a cutting insert between said clamping block and a wall of said cavity, means for selectively moving said clamping block into and out of wedging relationship with a cutting insert in said cavity, and means for selectively positively locking a cutting insert within said cavity including means for contacting and holding a cutting insert by exerting an axially directed force thereagainst at a location offset from the center of the insert.

Claim 8

The cutter of claim 5 wherein said wedging means includes a first surface on one portion of said clamping block for cooperation with a wall of said cavity and a second, opposed surface on another portion of said block and so angularly related to said first surface that said surfaces converge in a first direction.

Claim 9

The cutter of claim 6 wherein said first and second surfaces are so angularly related that said surfaces also converge in a second direction.

Claim 10

A milling cutter comprising a body rotatable about an axis and having a plurality of cavities formed about the periphery and adjacent one end thereof so as to be open to the periphery and adjacent end thereof, each cavity having a bottom wall, an inner wall, having a threaded aperture therein, a pair of sidewalls sloped so that each cavity is narrower at its said inner wall than at the periphery of said body and is wider at said bottom wall than at the end of said body, an insert cutter edge-receiving recess at the intersection of one of said sidewalls and said inner wall, and pedestal means located in said bottom wall adjacent said one of said sidewalls, an indexable milling insert mounted in each of said cavities adjacent said one of said sidewalls and positioned upon said pedestal such that that portion of the cutting edge of said insert which is within said cavity is located between said pedestal and said one of said sidewalls and within said recess, each insert having a cutting edge extending substantially about the periphery thereof and a cup formed in a surface thereof remote from said one of said cavity sidewalls and having an abutment surface about the periphery thereof, and wedge means having wedging surfaces thereon formed at substantially the same angle of slope as said cavity sidewalls, a first threaded aperture therein located in coaxial relationship with said threaded aperture in said inner wall, a differential screw means mounted in said first threaded aperture and said threaded aperture in said inner wall for movement of said wedge into and out of said cavity by rotation of said differential screw, a second threaded aperture extending between two intersecting surfaces of said wedge means, and a locking screw mounted in said second threaded aperture and extending therefrom into contact with said abutment surface of said insert for fixing said insert against movement relative to said cavity.

Claim 11

A milling cutter comprising a body rotatable about an axis and having a plurality of cavities formed about the periphery and adjacent one end thereof so as to be open to the periphery and adjacent end thereof, each cavity having a bottom wall, an inner wall, having a threaded aperture therein, a pair of sidewalls sloped so that each cavity is narrower at its said inner wall than at the periphery of said body and is wider at said bottom wall than at the end of said body, an insert cutter edge-receiving recess at the intersection of one of said sidewalls and said inner wall, and pedestal means located in said bottom wall adjacent said one of said sidewalls, an indexable milling insert mounted in each of said cavities adjacent said one of said sidewalls and positioned upon said pedestal such that that portion of the cutting edge of said insert which is within said cavity is located between said pedestal and said one of said sidewalls and within said recess, each insert having a cutting edge extending substantially about the periphery thereof and a cup formed in a surface thereof remote from said one of said cavity sidewalls and having an abutment surface about the periphery thereof, and wedge means having wedging surfaces thereon formed at substantially the same angle of slope as said cavity sidewalls, a first threaded aperture therein located in coaxial relationship with said threaded aperture in said inner wall, a differential screw means mounted in said first threaded aperture and said threaded aperture in said inner wall for movement of said wedge into and out of said cavity by rotation of said differential screw, a second threaded aperture extending between two intersecting surfaces of said wedge means, and a locking screw mounted in said second threaded aperture and extending therefrom into contact with said abutment surface of said insert for fixing said insert against movement relative to said cavity.

Claim 12

A milling cutter comprising a rotatable body having at least one insert receiving cavity therein which includes means for supporting an insert so that the cutting edge thereon does not contact the surfaces of said cavity, at least one clamping block mounted in said cavity for movement relative thereto along a first axis and having a plurality of wedging surfaces thereon which act between at least one wall of said at least one cavity and a surface of a milling insert adjacent thereto, first screw means for selectively moving said clamping block into and out of said cavity, and second screw means for exerting a positive locking force on a milling insert within said cavity, and an indexable milling insert within said cavity wedged against one wall thereof by said clamping block and positively retained therein by positive abutment contact therewith by said second screw means.

Claim 13

A milling cutter comprising a rotatable body having at least one insert receiving cavity therein which includes means for supporting an insert so that the cutting edge thereon does not contact the surfaces of said cavity, at least one clamping block mounted in said cavity for movement relative thereto along a first axis and having a plurality of wedging surfaces thereon which act between at least one wall of said at least one cavity and a surface of a milling insert adjacent thereto, first screw means for selectively moving said clamping block into and out of said cavity, and second screw means for exerting a positive locking force on a milling insert within said cavity, and an indexable milling insert within said cavity wedged against one wall thereof by said clamping block and positively retained therein by positive abutment contact therewith by said second screw means.

Claim 14

The cutter of claim 9 wherein said indexable milling insert includes a surface thereon for wedging contact with said clamping block and cup means in said surface defining an abutment surface extending about the periphery thereof and located concentrically with the axis of said insert.

Claim 15

A milling cutter comprising a body having at least one cavity therein open to the periphery of said body and including at least one insert abutment means and at least one wedging surface therein, a milling insert having a first surface in abutment with said at least one abutment means, a cutting edge, and a holding means thereon including a cup formed with a continuous abutment surface, and a wedging means in abutment with said wedging surface and said milling insert and including means for fixing said wedging means with said cavity and means for generating a positive locking force between said wedging means and said insert holding means to prevent removal of said insert from said cavity regardless of the direction of movemenT of said body including screw means which may be treaded through said wedging means and into contact with the abutment surface of said cup to positively retain said insert in said cavity.

Claim 16

A milling cutter comprising a body having at least one cavity therein open to the periphery of said body and including at least one insert abutment means and at least one wedging surface therein, a milling insert having a first surface in abutment with said at least one abutment means, a cutting edge, and a holding means thereon including a cup formed with a continuous abutment surface, and a wedging means in abutment with said wedging surface and said milling insert and including means for fixing said wedging means with said cavity and means for generating a positive locking force between said wedging means and said insert holding means to prevent removal of said insert from said cavity regardless of the direction of movemenT of said body including screw means which may be treaded through said wedging means and into contact with the abutment surface of said cup to positively retain said insert in said cavity.