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US 7,357,603 B2Granted
Toolholder and cutting insert used therein
AssigneeKennametal Inc.
InventorsBrian D. Hoefler, Stephen J. Shubert, Ruy Frota de Souza Filho, Scott W. Lebo, Ronald L. Dudzinsky
Life of this patent
Estimating the term…
Abstract
A toolholder at least one cutting insert mounted within a pocket about the peripheral wall of the cutter body. The body includes a pocket having an angled retention ledge which provides acts, in conjunction with a fastener, to securely retain an insert mounted therein. The insert has an angled edge which conforms with and works in conjunction with the toolholder pocket.
Claims36
A toolholder comprising:
- a) a cutter body rotatable about a central axis;
- b) a peripheral wall on the cutter body;
- c) insert pockets located in the peripheral wall, wherein each pocket is spaced from an adjacent pocket by a lug and wherein each pocket has support surfaces including a bottom surface adapted for positioning a rectangular insert within a predefined rectangular envelope within the pocket;
- d) wherein each rectangular envelope has a front and back and four sides therebetween, including a top side, a bottom side and a radially inward side;
- e) wherein each lug has:
- 1) a radial width;
- 2) a front face extending upwardly from the pocket bottom to the top of the lug;
- 3) an axial face extending downwardly from the top of the lug to a height below the top of the lug;
- and
- 4) a rear face extending from the axial face downwardly to the bottom surface of an adjacent pocket,
- f) wherein the support surfaces of the pocket are defined by the lug front face, the bottom surface, and a pocket wall positioned radially inwardly from the peripheral wall and connecting adjacent lugs;
- g) wherein the lug axial face is sloped downwardly across the entire lug width from the top of the lug to the lug rear face, thereby providing a chip clearance groove across the entire width of the lug;
- and
- h) wherein the lug front face extends over the back of the insert envelope.
11 more elements
A toolholder comprising:
- a) a cylindrical body rotatable about a central axis;
- b) a peripheral wall on the perimeter of the body integral and one with the body;
- c) a pocket located about the peripheral wall substantially within the perimeter of the body, wherein the pocket has support surfaces for positioning a generally rectangular insert within a predefined rectangular envelope within the pocket including:
- 1) a bottom surface associated with a single side of the insert;
- and
- 2) a front face extending upwardly from the pocket bottom surface to a top side of the body;
- and
- 3) a wall positioned inwardly from the peripheral wall;
- and
- d) wherein at least a portion of the bottom surface of the pocket forms a first angle with the front face of the pocket to define a first retention ledge and wherein the first angle is acute.
7 more elements
A cutting insert having a polygonal body of wear resistant material, said body comprising:
- a) a front surface;
- b) a back surface opposing the front surface;
- c) a peripheral wall with sides and corners about a centerline,
- d) at least one cutting edge formed at the intersection of the peripheral wall and one of the front surface or the back surface;
- e) wherein each side has a length defined between the front surface and the back surface;
- f) wherein at least one side has two opposing beveled surfaces thereupon, wherein a first beveled surface is proximate to the front surface and a second beveled surface is proximate to the back surface and wherein together the beveled surfaces extend over at least fifty-percent of the length of the side;
- and
- g) wherein the front surface is generally planar and includes a groove along the at least one cutting edge, wherein the groove extends downwardly and inwardly away from the cutting edge toward the centerline and then upwardly to meet the planar front surface to form a chip breaking groove and also retain the planar front surface as a mounting surface.
5 more elements
A toolholder comprising:
- a) a cutter body rotatable about a central axis;
- b) a peripheral wall on the cutter body;
- c) insert pockets located in the peripheral wall, wherein each pocket is spaced from an adjacent pocket by a lug and wherein each pocket has support surfaces including a bottom surface adapted for positioning a rectangular insert within the pocket, wherein at least a portion of the bottom surface of each pocket forms a first angle with the front face of the lug to define a first retention ledge and wherein the first angle is acute;
- d) a cutting insert positioned within each pocket and having a rectangular shape with a front surface and a back surface and four sides therebetween, including a top side, a bottom side and a radially inward side, wherein each side has a length between the front surface and the back surface and wherein each has two opposing beveled surfaces thereupon, wherein a first beveled surface is proximate to the front surface and a second beveled surface is proximate to the back surface and wherein together the beveled surfaces extend over at least 50 percent of the length of each side;
- e) wherein each lug has:
- 1) a radial width;
- 2) a front face extending upwardly from the pocket bottom to the top of the lug;
- 3) an axial face extending downwardly from the top of the lug to a height below the top of the lug;
- and
- 4) a rear face extending from the axial face downwardly to the bottom surface of an adjacent pocket,
- f) wherein the support surfaces of the pocket are defined by the lug front face, the bottom surface, and a pocket wall positioned radially inwardly from the peripheral wall and connecting adjacent lugs, wherein at least a portion of the pocket wall of the pocket forms a second angle with the front face of the lug to define a second retention ledge and wherein the second angle is acute;
- g) wherein the lug axial face is sloped downwardly across the entire lug width from the top of the lug to the lug rear face, thereby providing a chip clearance groove across the entire width of the lug;
- h) wherein the lug front face extends over the back of the insert;
- and
- i) wherein the inserts rest within a pocket such that the beveled surfaces of two adjacent sides of an insert contact the first retention ledge and the second retention ledge within a pocket.
12 more elements
A milling cutter comprising:
- a) a cutter body rotatable about a central axis;
- b) a peripheral wall on the cutter body;
- c) insert pockets located in the peripheral wall, wherein each pocket is spaced from an adjacent pocket by a lug and wherein each pocket has support surfaces including a bottom surface adapted for positioning a rectangular insert within a predefined rectangular envelope within the pocket;
- d) wherein each rectangular envelope has a front and back and four sides therebetween, including a top side, a bottom side and a radially inward side;
- e) wherein each lug has:
- 1) a radial width;
- 2) a front face extending upwardly from the pocket bottom to the top of the lug;
- 3) an axial face extending downwardly from the top of the lug to a height below the top of the lug;
- and
- 4) a rear face extending from the axial face downwardly to the bottom surface of an adjacent pocket;
- f) wherein the support surfaces of the pocket are defined by the lug front face, the bottom surface, and a pocket wall positioned radially inwardly from the peripheral wall and connecting adjacent lugs;
- g) wherein the lug axial face is sloped downwardly across the entire lug width from the top of the lug to the lug rear face, thereby providing a chip clearance groove across the entire width of the lug;
- and
- h) wherein the lug front face extends over the entire back of the insert envelope.
11 more elements
Dependencies are inferred from the claim text.