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US 7,530,769 B2Granted
Tool for the metal cutting machining of valve seats
AssigneeMapal Fabrik fur Prazisionswerkzeuge Dr. Kress KG
InventorsDieter Kress, Friedrich Häberle
Life of this patent
Estimating the term…
Abstract
A tool for metal-cutting machining of a surface of an opening particularly of a valve seat in a cylinder head of an internal combustion engines. The tool has a cutter tip with at least one geometrically defined cutting edge. The cutter tip rests on two supporting regions in the tool which are arranged at an angle α, and an angle-bisecting line runs essentially perpendicularly with respect to the active cutting edge which then is removing chips from the valve seat. A claw holds the cutting tip to the tool end. Coolant and lubricant are supplied through an outlet from the claw.
Claims19
A tool for metal cutting machining a surface in an opening, the tool comprising:
- a cutter tip having at least one geometrically defined cutting edge, the cuffing edge formed in a straight line between two adjacent corners of the cutter tip, wherein the cutter tip is a hexagonally shaped indexable tip and wherein an angle between each side of the cutter tip and an adjacent side is substantially the same for each side of the cutter tip;
- the cutter tip having a front side with at least one clamping notch having a V-shaped cross-section formed in the front side;
- two supporting regions in the tool for supporting the cutter tip, the supporting regions having support surfaces against which the cutter tip rests, and the support surfaces of the supporting region are oriented with respect to each other at an angle, the supporting regions also being so oriented that a line bisecting the angle between the support surfaces runs essentially perpendicular to an active one of the cutting edges, which is the edge that removes metal chips from the surface in the opening, wherein the cutter tip is turnable six times to make six cutting edges available for machining;
- a clamping claw which holds the cutter tip to the supporting regions, the clamping claw comprising a clamping lip;
- wherein
- the clamping lip comes to rest on a front side of the cutter tip and engages the clamping notch, and wherein the tool and cutter tip thereof are both shaped to be operable for metal cutting machining of valve seats in cylinder heads of internal combustion engines.
3 more elements
A method for metal cutting machining of a surface in an opening comprising:
- operating a tool to metal cut machine a surface in an opening, the tool comprising:
- a cutter tip having at least one geometrically defined cuffing edge, the cutting edge formed as a straight line between two adjacent corners of the cutter tip, wherein the cutter tip is a hexagonally shaped indexable tip and wherein an angle between each side of the cutter tip and an adjacent side is substantially the same for each side of the cutter tip;
- the cutter tip having a front side with at least one clamping notch having a V-shaped cross-section formed in the front side;
- two supporting regions in the tool for supporting the cutter tip, the supporting regions having support surfaces against which the cutter tip rests, and the support surfaces of the supporting region are oriented with respect to each other at an angle, the supporting regions also being so oriented that a line bisecting the angle between the support surfaces runs essentially perpendicular to an active one of the cutting edges, which is the edge that removes metal chips from the surface in the opening, wherein the cutter tip is turnable six times to make six cutting edges available for machining;
- a clamping claw which holds the cutter tip to the supporting regions, the clamping claw comprising a clamping lip;
- wherein
- the clamping lip comes to rest on a front side of the cutter tip and engages a clamping notch, and wherein the tool and cutter tip thereof are both shaped to be operable for metal cutting machining of valve seats in cylinder heads of internal combustion engines;
- and
- wherein the cutter tip is not required to be reset or adjusted when a respective active cutting edge thereof becomes worn.
6 more elements
A tool for metal cutting machining a surface in an opening, the tool comprising:
- a cutter tip having at least one geometrically defined cutting edge, the cutting edge formed in a straight line between two adjacent corners of the cutter tip, wherein the cutter tip is a polygon shaped indexable tip and wherein an angle between each side of the cutter tip and an adjacent side is substantially the same for each side of the cutter tip;
- the cutter tip having a front side with at least one clamping notch having a V-shaped cross-section formed in the front side;
- two supporting regions in the tool for supporting the cutter tip, against which the cutter tip rests, and the supporting regions are oriented with respect to each other at an angle, the supporting regions also being so oriented that a line bisecting the angle between the supporting regions runs essentially perpendicular to an active one of the cutting edges, which is the edge that removes metal chips from the surface in the opening, wherein the cutter tip is turnable to make multiple cutting edges available for machining;
- a clamping claw which holds the cutter tip to the supporting regions, the clamping claw comprising a clamping lip;
- wherein
- the clamping lip comes to rest on a front side of the cutter tip and engages the clamping notch, and wherein the tool and cutter tip thereof are both shaped to be operable for metal cutting machining of valve seats in cylinder heads of internal combustion engines.
3 more elements
Dependencies are inferred from the claim text.