Tool for machining workpieces by cutting
AssigneeDeutsches Zentrum fuer Luft-und Raumfahrt
InventorsWalter Krenkel, Richard Kochendoerfer, Martin Friess
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Abstract
A tool for machining workpieces, specially metal workpieces, by cutting, e.g., grinding, polishing, milling, separating or honing, comprising at least one stock-removing tool portion and whose machining range consists of a composite material containing a hard material. Said tool is characterized in that the composite material is formed by a fiber structure consisting of substantially continuous fibers made of carbon and/or a ceramic material and by a matrix containing carbon and hard material, and is also characterized in that at least the machining range, like the cutting or milling tool, is made of said composite material.
Claims34
In a tool for machining operations, wherein the tool includes at least one machining die with at least one working area in the form of a cutting surface, the improvement wherein the tool is made from a preform comprising continuous fibers, which forms a fiber structure, of at least one carbon and ceramic material and a matrix containing carbon, and wherein a liquid metal is infiltrated into the preform in order to form a hard material in situ by a reaction of the metal with the carbon of at least one of the carbon fibers and carbon to form a composite material, a portion of the fibers ending in a region of the cutting surface of the working area of the tool.
A tool for machining operations, wherein the tool includes at least one machining die with at least one working area in the form of a cutting surface, produced by a method comprising:
- providing a preform comprising continuous fibers, in a fiber structure, of at least one of carbon and ceramic material and a matrix containing carbon;
- and
- infiltrating liquid metal into the preform to form a hard material in situ, by a reaction of the metal with the carbon of at least one of the carbon fibers and carbon,
- wherein the fibers form a fiber structure in a composite material of the tool, a portion of the fibers terminating at the cutting surface of the working area of the tool.
A tool for machining workpieces, comprising:
- at least one machining die having a cutting edge at a surface of the tool;
- and
- a body for positioning and retaining said at least one machining die,
- wherein said machining die comprises a composite material having a fibrous component and a matrix component, said fibrous component having a regular orientation of continuous fibers selected from the group consisting of ceramic and carbon-derived, at least a portion of which terminate at said cutting edge, and
- wherein one of said fibers and said matrix are a product resultant from an in situ reaction of a metal phase and carbon to produce a metal-carbide abrasive.
Dependencies are inferred from the claim text.