Disc cutter for undercutting apparatus and a method of manufacture thereof

Patent metadata

Field	Value
Publication number	US-2022010627-A1
Application number	US-201917295772-A
Country	US
Kind code	A1
Filing date	Oct 31, 2019
Priority date	Nov 23, 2018
Publication date	Jan 13, 2022
Grant date	—

Abstract

A disc cutter for a cutting unit used in an undercutting operation and a method of producing the same. The disc cutter including an annular disc body made of a metal alloy or metal matrix composite having a first side, a second side arranged substantially opposite to the first side and a radially peripheral part. At least one metal alloy, metal matrix composite or cemented carbide cutting part is mounted in and substantially encircling the radially peripheral part of the disc body which protrudes outwardly therefrom to engage with the rock during the mining operation. The at least one cutting part is made from a material having a higher wear resistance than the material used for the disc body, wherein the disc body and the cutting part are joined by diffusion bonds.

First claim

1 . A disc cutter for a cutting unit used in an undercutting apparatus comprising:
an annular disc body made of a metal alloy or metal matrix composite having a first side, a second side arranged substantially opposite to the first side and a radially peripheral part; and at least one metal alloy, metal matrix composite or cemented carbide cutting part mounted in and substantially encircling the radially peripheral part of the disc body which protrudes outwardly therefrom to engage with the rock during operation wherein the at least one cutting part is made from a material having a higher wear resistance than the material used for the disc body, wherein the least one disc body and the at least one cutting part are joined by diffusion bonds.

2 . The disc cutter according to claim 1 , further comprising a metallic interlayer disposed between at the least one disc body and the at least one cutting part, elements of the at least one disc body, at least one cutting part and the metallic interlayer form the diffusion bonds.

3 . The disc cutter according to claim 2 , wherein the metallic interlayer essentially comprises nickel, nickel alloy, copper or copper alloy.

4 . The disc cutter according to claim 2 , wherein the metallic interlayer comprises an alloy essentially consisting of copper and nickel.

5 . The disc cutter according to claim 2 , wherein the metallic interlayer has a thickness of from about 50 to about 500 μm.

6 . The disc cutter according to claim 1 , wherein the at least one cutting part comprises a cemented carbide.

7 . The disc cutter according to claim 1 , wherein the at least one cutting part comprising a metal alloy.

8 . The disc cutter according to claim 1 , wherein the at least one cutting part is the form of a plurality of buttons or wear pads.

9 . The disc cutter according to claim 1 , wherein the at least one cutting part is in the form of a continuous ring.

10 . The disc cutter according to claim 1 , wherein the disc body has at least two layers.

11 . The disc cutter according to claim 10 , wherein the disc body includes a first layer and a second layer, wherein the first layer comprises a metal or metal matrix composite with a higher wear resistance than the second layer.

12 . A method for manufacturing a disc cutter for a cutting unit used in an undercutting apparatus the disc cutter including an annular disc body made of a metal alloy or metal matrix composite having a first side, a second side arranged substantially opposite to the first side and a radially peripheral part, and at least one metal alloy, metal matrix composite or cemented carbide cutting part mounted in and substantially encircling the radially peripheral part of the disc body which protrudes outwardly there form to engage with the rock during the mining operation, the method comprising the steps of:
a) providing at least one annular disc body made of a metal alloy or at least one annular disc body made of a metal matrix composite and at least one metal alloy cutting part or at least one metal matrix composite cutting part or at least one cemented carbide cutting part; b) assembling the at least one disc body and at least one cutting part together; c) enclosing the at least one disc body and the at least one cutting part in a capsule; d) optionally evacuating air from the capsule; e) sealing the capsule;and f) subjecting the capsule to a predetermined temperature of above about 1000° C. and a predetermined pressure of from about 300 bar to about 1500 bar during a predetermined time.

13 . The method according to claim 12 , wherein there is further comprising an additional step between a) and b) of positioning a metallic interlayer between each of the surface(s) of each of the disc body and each of surface(s) of the cutting parts.

14 . The method according to claim 13 , wherein the metallic interlayer essentially comprises nickel, nickel alloy, copper or copper alloy.

15 . The method according to claim 13 , wherein the metallic interlayer is formed by an alloy essentially consisting of copper and nickel.

16 . The method according to claim 13 , wherein the metallic interlayer is formed from a foil or a powder.

17 . The method according to claim 13 , wherein the metallic interlayer is formed by electrolytic plating.

18 . The method according to claim 13 , further comprising adding grooves to the surface(s) of the at least one cutting part or to the surface(s) of both the at least one annular body and to the surface(s) of the at least one cutting part.

19 . A method of using the disc cutter according to claim 1 for reef mining, rapid mine development systems, oscillating disc cutting or actuated disc cutting.

Assignees

• Sandvik Mining And Construction Tools Ab

Inventors

• Claesson Bjorn
• Ederyd Stefan
• Sundstrom Johan
• Berglund Tomas
• Meurling Fredrik

Classifications

• E21C27/22

  by rotary drills with breaking-down means, e.g. wedge-shaped drills {, i.e. the rotary axis of the tool carrier being substantially perpendicular to the working face, e.g. MARIETTA-type (similar machines for tunneling E21D9/102)} · CPC title

• E21B10/573

  characterised by support details, e.g. the substrate construction or the interface between the substrate and the cutting element · CPC title

• B22F3/14

  simultaneously · CPC title

• C22C29/10

  based on titanium carbide · CPC title

• B22F2998/10

  Processes characterised by the sequence of their steps · CPC title