Tool having a hard material

Patent metadata

Field	Value
Publication number	US-2018258618-A1
Application number	US-201815969036-A
Country	US
Kind code	A1
Filing date	May 2, 2018
Priority date	Nov 6, 2015
Publication date	Sep 13, 2018
Grant date	—

Abstract

The invention relates to a tool having a hard material for processing mineral and/or plant-based material layers, in particular of traffic areas and/or agricultural floor areas or combinations thereof with one another. According to the invention, at least one part of the cutting element is formed or covered with a hard material containing fullerite or formed from fullerite. The wear resistance of the tool can be significantly improved by the extremely hard material.

First claim

1 . A tool with at least one cutting element for machining mineral and/or vegetable material layers,
wherein at least part of the cutting element is formed and/or is covered with a hard material which includes fullerite or is formed from fullerite.

2 . The tool as claimed in claim 1 , wherein a tool head, which carries the cutting element, of the tool is covered at least in part by the hard material.

3 . The tool as claimed in claim 1 , wherein the hard material is applied as a result of a coating process onto at least part of the cutting element and/or of the tool head.

4 . The tool as claimed in claim 1 , wherein the hard material is applied as a result of a sintering process of a sintering material which includes fullerite.

5 . The tool as claimed in claim 1 , further comprising an intermediate material arranged between the hard material and the cutting element and/or the tool head.

6 . The tool as claimed in claim 5 , wherein the intermediate material provides a barrier for the diffusion of substances into or out of the hard material and/or wherein the intermediate material comprises a thermal expansion coefficient which lies between the expansion coefficient of the hard material and that of the cutting element and/or that of the tool head.

7 . The tool as claimed in claim 1 , wherein the hard material covers a hard substance of the tool.

8 . The tool as claimed in claim 1 , wherein the hard material covers a region of the tool formed from steel.

9 . The tool as claimed in claim 1 , wherein the cutting element covers the tool head at least in regions.

10 . The tool as claimed in claim 1 , wherein the fullerite is formed by fullerene as starting material.

11 . The tool as claimed in claim 1 , wherein the fullerite is formed under high pressure and/or at a high temperature and/or wherein the fullerite is formed as a result of adding a further substance.

12 . The tool as claimed in claim 1 , wherein the fullerite comprises a hardness of greater than or equal to 130 GPa.

13 . The tool as claimed in claim 1 , wherein the tool is a cutting tool for a road milling machine, having a cutting tool head as a tool head which carries at least one cutting element and having a coupling piece for connecting the cutting tool to a cutting tool holder or to another such base part.

14 . The tool as claimed in claim 7 , wherein the hard substance is a hard metal and/or polycrystalline diamond.

15 . The tool as claimed in claim 10 , wherein the fullerene is fullerene C 60 .

16 . The tool as claimed in claim 11 , wherein the further substance is xylene or carbon disulfide.

17 . The tool as claimed in claim 12 , wherein the fullerite comprises a hardness of greater than or equal to 170 GPa.

Assignees

• Betek Gmbh & Co Kg

Inventors

• Kraemer Ulrich
• Chmelik David

Classifications

• E02F9/2866

  for rotating digging elements (for milling machines B28D1/186; for mining machines E21C35/18) · CPC title

• E02F9/285 Primary

  characterised by the material used · CPC title

• A01B33/10

  Structural or functional features of the tools {; Theoretical aspects of the cutting action} · CPC title

• B01J3/062

  characterised by the composition of the materials to be processed · CPC title

• E21C35/183

  with inserts or layers of wear-resisting material {(drill bits with wear-resistant parts E21B10/46)} · CPC title