Cutting insert, cutting tool comprising such an insert and methods for producing and repairing such a tool
AssigneeDiamonde
InventorsTimothée Grunder, Anne Piquerez
Life of this patent
Estimating the term…
Abstract
The invention relates to an insert brazed on a body of cutting tools (101), consisting of: a metal substrate (11), in the form of plates, having a surface for attachment to the tool body; a high-temperature, brazing, alloy layer (12); an intermediate layer; and a ceramic plate (14). The brazing alloy layer connects the metal substrate (11) of the ceramic plate (14) via the metal layer (13). A low-temperature brazing layer (1) connects the insert (1, 1′) to the body of the tool (101).
Claims12
Cutting insert for brazing onto a cutting tool body for working wood-based composite materials, the cutting insert comprising:
- a substrate (11) in the form of a plate with a fastening surface (11 a) to the cutting tool body, where the substrate (11) includes tungsten carbide, steel, nickel steel, or a tungsten carbide-cobalt composite,
- a high-temperature brazing alloy layer (12)
- an intermediate metal layer (13)
- a ceramic plate (14) that consists of alumina (Al2O3), zirconia, zirconia-yttria, or a combination thereof, the ceramic plate (14) having the same dimensions as the substrate (11),
- the high-temperature brazing alloy layer (12) connecting the substrate (11) to the ceramic plate (14) by means of the intermediate metal layer (13), where the intermediate metal layer (13) is between the ceramic plate (14) and the high-temperature brazing alloy layer (12), and
- the high-temperature brazing alloy (12) is an alloy of silver-copper with more than 50% by volume of silver or an alloy of silver, indium, and titanium.
Production method of a cutting tool for working wood-based composite materials, the method comprising:
- a) using a ceramic plate (14) consisting of alumina (Al2O3), zirconia, zirconia-yttria, or a combination thereof, and a substrate (11) that includes tungsten carbide, steel, nickel steel, or a tungsten carbide-cobalt composite, the ceramic plate (14) having the same dimensions as the substrate (11),
- b) applying an intermediate metal layer (13) to the ceramic plate (14),
- c) applying a high-temperature brazing alloy (12) between the intermediate metal layer (13) and the substrate (11),
- d) brazing the ceramic plate (14) to the substrate plate (11) by high-temperature vacuum brazing with the high-temperature brazing alloy (12), the high-temperature brazing alloy (12) being an alloy of silver-copper with more than 50% by volume of silver or an alloy of silver, indium, and titanium, to form an assembly (20),
- e) cutting out of the assembly (20) obtained in this way a cutting insert (1 or 1′),
- f) brazing the cutting insert (1 or 1′) on to a tool body by brazing at atmospheric pressure, at low temperature, with a low temperature brazing alloy, to form the cutting tool.
Dependencies are inferred from the claim text.