GB2193740A - Cutting element for a mining machine - Google Patents

Cutting element for a mining machine Download PDF

Info

Publication number
GB2193740A
GB2193740A GB08718896A GB8718896A GB2193740A GB 2193740 A GB2193740 A GB 2193740A GB 08718896 A GB08718896 A GB 08718896A GB 8718896 A GB8718896 A GB 8718896A GB 2193740 A GB2193740 A GB 2193740A
Authority
GB
United Kingdom
Prior art keywords
cutting
abrasive compact
abrasive
compact
cutting element
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB08718896A
Other versions
GB8718896D0 (en
GB2193740B (en
Inventor
Peter Noel Tomlinson
Klaus Tank
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
De Beers Industrial Diamond Division Pty Ltd
Original Assignee
De Beers Industrial Diamond Division Pty Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by De Beers Industrial Diamond Division Pty Ltd filed Critical De Beers Industrial Diamond Division Pty Ltd
Publication of GB8718896D0 publication Critical patent/GB8718896D0/en
Publication of GB2193740A publication Critical patent/GB2193740A/en
Application granted granted Critical
Publication of GB2193740B publication Critical patent/GB2193740B/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
    • E21C35/18—Mining picks; Holders therefor
    • E21C35/183—Mining picks; Holders therefor with inserts or layers of wear-resisting material
    • E21C35/1835—Chemical composition or specific material
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
    • E21C35/18—Mining picks; Holders therefor
    • E21C35/183—Mining picks; Holders therefor with inserts or layers of wear-resisting material
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C35/00—Details of, or accessories for, machines for slitting or completely freeing the mineral from the seam, not provided for in groups E21C25/00 - E21C33/00, E21C37/00 or E21C39/00
    • E21C35/18—Mining picks; Holders therefor
    • E21C35/183—Mining picks; Holders therefor with inserts or layers of wear-resisting material
    • E21C35/1837—Mining picks; Holders therefor with inserts or layers of wear-resisting material characterised by the shape

Abstract

A cutting element for a cutting tool of a mining machine for cutting soft materials comprises a supporting pin (10), one end (28) of which is adapted to be located in a socket in the cutting tool and the other end of which has a recess (14) in which is located a composite abrasive compact (16). The composite abrasive compact is bonded to the pin. The abrasive compact layer (18) of the composite abrasive compact has a bevelled cutting edge (22). <IMAGE>

Description

SPECIFICATION Cutting element for a mining machine BACKGROUND OF THE INVENTION This invention relates to cutting elements for use in mining machines of the type which are used to cut a variety of soft materials such as coal.
In mining machines of this type, a plurality of cutting tools (also known as picks) are positioned on a working surface, for example the surface of a drum, and moved in a cutting direction against the face of the material to be cut. Each tool comprises a holding lug and a cutting element secured in a bore or socket in the lug. The cutting element may be made of a wear resistant material such as cemented carbide. Alternatively, the cutting element may comprise an elongate pin one end of which has secured to it an abrasive compact which provides a cutting edge for the element.
SUMMARY OF THE INVENTION According to the present invention, there is provided a cutting element for a cutting tool of a mining machine of the type described above comprising a supporting pin, one end of which is adapted to be located in a socket in the cutting tool and the opposite end of which has bonded thereto an abrasive compact, the abrasive compact presenting a bevelled cutting edge.
DESCRIPTION OF THE DRAWING Figure 1 illustrates a side view of an embodiment of a cutting element of the invention; and Figure 2 illustrates a perspective view of a cutting tool including the cutting element of Fig. 1.
DETAILED DESCRIPTION OF THE INVENTION The supporting pin which carries the abrasive compact is preferably made of cemented carbide, typically cemented tungsten carbide.
The abrasive compact will generally be provided in the form of a disc which provides a circular, bevelled cutting edge. The abrasive compact may be any known in the art. Abrasive compacts consist essentially of a mass of abrasive particles present in an amount of at least 70%, preferably 80 to 90% by volume of the compact bonded into a hard conglomerate. Compacts are polycrystalline masses and can repiace single large crystals. The abrasive particles of compacts are invariably ultra-hard abrasives such as diamond and cubic boron nitride.
Diamond and cubic boron nitride compacts are manufactured under conditions of temperature and pressure at which the abrasive particle is crystallographically stable. Consequently, compacts include a considerable amount of direct particle-to-particle bonding.
The abrasive compact may be bonded to a cemented carbide support. Such bonded abrasive compacts are known in the art as composite abrasive compacts. Composite abrasive compacts and their method of manufacture have been described extensively in the patent literature, for example United States Patents No. 3,743,489, 3,767,371, 4,063,909, and 3,745,623.
The abrasive compact or composite abrasive compact will preferably be located in a recess formed in one end of the supporting pin. The shape of the pin is preferably such that it provides a shoulder surrounding the recess and sloping away from it.
Bonding of the abrasive compact or composite abrasive compact to the supporting pin may be achieved by methods known in the art, for example brazing.
An embodiment of the invention will now be described with reference to the accompanying drawing. Referring to Fig. 1 of this drawing, there is shown a cutting element comprising a supporting pin 10 made of cemented carbide. The supporting pin has formed at one end 12 thereof a recess 14 in which is located a composite abrasive compact 16. The composite abrasive compact comprises an abrasive compact layer 18 bonded to a cemented carbide support 20.
The cemented carbide support 20 is bonded to the supporting pin by means of a suitable braze. The abrasive compact layer 18 presents a bevelled cutting edge 22. The bevelled edge 22 has the advantage over the sharp edge of prior art cutting elements in that the tendency for chipping to occur is minimised.
Sloping away from the recess is a shoulder 24 which surrounds the recess completely.
The shoulder leads to a widened zone 26 which in turn leads to a lower narrower zone 28. In use, the supporting pin is located in a socket in a cutting tool for a mining machine in the manner illustrated by Fig. 2. Referring to this figure, the cutting tool comprises a holding lug 30, one end 32 of which is shaped for mounting in the drum surface of a conventional mining machine and the other end 34 of which provides a working surface 36. A socket 38 is formed in the working surface 36. The supporting pin 10 is located in the socket such that the zones 26 and 28 fit wholly within the socket which has complementally shaped zones. The pin may be secured in the socket by brazing.
1. A cutting element for a cutting tool of a minining machine of the type used to cut soft materials comprising a supporting pin, one end of which is adapted to be located in a socket in the cutting tool and the opposite end of which has bonded thereto an abrasive compact, the abrasive compact presenting a bev
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (6)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Cutting element for a mining machine BACKGROUND OF THE INVENTION This invention relates to cutting elements for use in mining machines of the type which are used to cut a variety of soft materials such as coal. In mining machines of this type, a plurality of cutting tools (also known as picks) are positioned on a working surface, for example the surface of a drum, and moved in a cutting direction against the face of the material to be cut. Each tool comprises a holding lug and a cutting element secured in a bore or socket in the lug. The cutting element may be made of a wear resistant material such as cemented carbide. Alternatively, the cutting element may comprise an elongate pin one end of which has secured to it an abrasive compact which provides a cutting edge for the element. SUMMARY OF THE INVENTION According to the present invention, there is provided a cutting element for a cutting tool of a mining machine of the type described above comprising a supporting pin, one end of which is adapted to be located in a socket in the cutting tool and the opposite end of which has bonded thereto an abrasive compact, the abrasive compact presenting a bevelled cutting edge. DESCRIPTION OF THE DRAWING Figure 1 illustrates a side view of an embodiment of a cutting element of the invention; and Figure 2 illustrates a perspective view of a cutting tool including the cutting element of Fig. 1. DETAILED DESCRIPTION OF THE INVENTION The supporting pin which carries the abrasive compact is preferably made of cemented carbide, typically cemented tungsten carbide. The abrasive compact will generally be provided in the form of a disc which provides a circular, bevelled cutting edge. The abrasive compact may be any known in the art. Abrasive compacts consist essentially of a mass of abrasive particles present in an amount of at least 70%, preferably 80 to 90% by volume of the compact bonded into a hard conglomerate. Compacts are polycrystalline masses and can repiace single large crystals. The abrasive particles of compacts are invariably ultra-hard abrasives such as diamond and cubic boron nitride. Diamond and cubic boron nitride compacts are manufactured under conditions of temperature and pressure at which the abrasive particle is crystallographically stable. Consequently, compacts include a considerable amount of direct particle-to-particle bonding. The abrasive compact may be bonded to a cemented carbide support. Such bonded abrasive compacts are known in the art as composite abrasive compacts. Composite abrasive compacts and their method of manufacture have been described extensively in the patent literature, for example United States Patents No. 3,743,489, 3,767,371, 4,063,909, and 3,745,623. The abrasive compact or composite abrasive compact will preferably be located in a recess formed in one end of the supporting pin. The shape of the pin is preferably such that it provides a shoulder surrounding the recess and sloping away from it. Bonding of the abrasive compact or composite abrasive compact to the supporting pin may be achieved by methods known in the art, for example brazing. An embodiment of the invention will now be described with reference to the accompanying drawing. Referring to Fig. 1 of this drawing, there is shown a cutting element comprising a supporting pin 10 made of cemented carbide. The supporting pin has formed at one end 12 thereof a recess 14 in which is located a composite abrasive compact 16. The composite abrasive compact comprises an abrasive compact layer 18 bonded to a cemented carbide support 20. The cemented carbide support 20 is bonded to the supporting pin by means of a suitable braze. The abrasive compact layer 18 presents a bevelled cutting edge 22. The bevelled edge 22 has the advantage over the sharp edge of prior art cutting elements in that the tendency for chipping to occur is minimised. Sloping away from the recess is a shoulder 24 which surrounds the recess completely. The shoulder leads to a widened zone 26 which in turn leads to a lower narrower zone 28. In use, the supporting pin is located in a socket in a cutting tool for a mining machine in the manner illustrated by Fig. 2. Referring to this figure, the cutting tool comprises a holding lug 30, one end 32 of which is shaped for mounting in the drum surface of a conventional mining machine and the other end 34 of which provides a working surface 36. A socket 38 is formed in the working surface 36. The supporting pin 10 is located in the socket such that the zones 26 and 28 fit wholly within the socket which has complementally shaped zones. The pin may be secured in the socket by brazing. CLAIMS
1. A cutting element for a cutting tool of a minining machine of the type used to cut soft materials comprising a supporting pin, one end of which is adapted to be located in a socket in the cutting tool and the opposite end of which has bonded thereto an abrasive compact, the abrasive compact presenting a bev elled cutting edge.
2. A cutting element of claim 1 wherein the abrasive compact is the compact layer of a composite abrasive compact.
3. A cutting element of claim 1 or claim 2 wherein the abrasive compact or composite abrasive compact is located in a recess formed in one end of the supporting pin.
4. A cutting element of any one of the preceding claims wherein the abrasive compact is a diamond compact.
5. A cutting element of any one of the preceding claims wherein the supporting pin is made of cemented carbide.
6. A cutting element of claim 1 substantially as herein described with reference to the accompanying drawing.
GB8718896A 1986-08-11 1987-08-10 Cutting tool for a mining machine Expired - Lifetime GB2193740B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
ZA866006 1986-08-11

Publications (3)

Publication Number Publication Date
GB8718896D0 GB8718896D0 (en) 1987-09-16
GB2193740A true GB2193740A (en) 1988-02-17
GB2193740B GB2193740B (en) 1990-04-04

Family

ID=25578513

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8718896A Expired - Lifetime GB2193740B (en) 1986-08-11 1987-08-10 Cutting tool for a mining machine

Country Status (5)

Country Link
AU (1) AU600501B2 (en)
BE (1) BE1000203A4 (en)
DE (1) DE8710722U1 (en)
FR (1) FR2602541B3 (en)
GB (1) GB2193740B (en)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU600501B2 (en) * 1986-08-11 1990-08-16 De Beers Industrial Diamond Division (Proprietary) Limited Cutting element for a mining machine
US5429199A (en) * 1992-08-26 1995-07-04 Kennametal Inc. Cutting bit and cutting insert
US5437343A (en) * 1992-06-05 1995-08-01 Baker Hughes Incorporated Diamond cutters having modified cutting edge geometry and drill bit mounting arrangement therefor
US5460233A (en) * 1993-03-30 1995-10-24 Baker Hughes Incorporated Diamond cutting structure for drilling hard subterranean formations
US5706906A (en) * 1996-02-15 1998-01-13 Baker Hughes Incorporated Superabrasive cutting element with enhanced durability and increased wear life, and apparatus so equipped
US5924501A (en) * 1996-02-15 1999-07-20 Baker Hughes Incorporated Predominantly diamond cutting structures for earth boring
BE1012070A3 (en) * 1998-07-10 2000-04-04 Marchandise Diamant Service En Cutting insert
US6935444B2 (en) 2003-02-24 2005-08-30 Baker Hughes Incorporated Superabrasive cutting elements with cutting edge geometry having enhanced durability, method of producing same, and drill bits so equipped
WO2010083015A1 (en) * 2009-01-13 2010-07-22 Diamond Innovations, Inc. Radial tool with superhard cutting surface
CN102699555A (en) * 2012-06-19 2012-10-03 中煤科工集团西安研究院 Transitional connection piece of polycrystalline diamond clad sheet and drill bit matrix and connection process for transitional connection piece
GB2508271A (en) * 2012-09-28 2014-05-28 Element Six Gmbh Planar rock pick strike member
WO2014186293A1 (en) * 2013-05-16 2014-11-20 Us Synthetic Corporation Shear cutter pick milling system
WO2014186212A1 (en) * 2013-05-16 2014-11-20 Us Synthetic Corporation Road-removal system employing polycrystalline diamond compacts
US10408057B1 (en) 2014-07-29 2019-09-10 Apergy Bmcs Acquisition Corporation Material-removal systems, cutting tools therefor, and related methods
US10414069B2 (en) 2014-04-30 2019-09-17 Us Synthetic Corporation Cutting tool assemblies including superhard working surfaces, material-removing machines including cutting tool assemblies, and methods of use
US10648330B1 (en) 2015-09-25 2020-05-12 Us Synthetic Corporation Cutting tool assemblies including superhard working surfaces, cutting tool mounting assemblies, material-removing machines including the same, and methods of use

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5092310A (en) * 1989-05-23 1992-03-03 General Electric Company Mining pick
USD798920S1 (en) 2015-09-25 2017-10-03 Us Synthetic Corporation Cutting tool assembly
USD798350S1 (en) 2015-09-25 2017-09-26 Us Synthetic Corporation Cutting tool assembly

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4442909A (en) * 1981-09-21 1984-04-17 Strata Bit Corporation Drill bit
GB2147037A (en) * 1983-09-05 1985-05-01 De Beers Ind Diamond Tool component
GB2181472A (en) * 1985-08-22 1987-04-23 Anderson Strathclyde Plc Cutter tools and tip inserts therefor

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE8710722U1 (en) * 1986-08-11 1987-10-15 De Beers Industrial Diamond Division (Proprietary) Ltd., Johannesburg, Transvaal, Za

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4442909A (en) * 1981-09-21 1984-04-17 Strata Bit Corporation Drill bit
GB2147037A (en) * 1983-09-05 1985-05-01 De Beers Ind Diamond Tool component
GB2181472A (en) * 1985-08-22 1987-04-23 Anderson Strathclyde Plc Cutter tools and tip inserts therefor

Cited By (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU600501B2 (en) * 1986-08-11 1990-08-16 De Beers Industrial Diamond Division (Proprietary) Limited Cutting element for a mining machine
US5437343A (en) * 1992-06-05 1995-08-01 Baker Hughes Incorporated Diamond cutters having modified cutting edge geometry and drill bit mounting arrangement therefor
US5429199A (en) * 1992-08-26 1995-07-04 Kennametal Inc. Cutting bit and cutting insert
US5460233A (en) * 1993-03-30 1995-10-24 Baker Hughes Incorporated Diamond cutting structure for drilling hard subterranean formations
US6082223A (en) * 1996-02-15 2000-07-04 Baker Hughes Incorporated Predominantly diamond cutting structures for earth boring
US5706906A (en) * 1996-02-15 1998-01-13 Baker Hughes Incorporated Superabrasive cutting element with enhanced durability and increased wear life, and apparatus so equipped
US6000483A (en) * 1996-02-15 1999-12-14 Baker Hughes Incorporated Superabrasive cutting element with enhanced durability and increased wear life, and apparatus so equipped
US5924501A (en) * 1996-02-15 1999-07-20 Baker Hughes Incorporated Predominantly diamond cutting structures for earth boring
BE1012070A3 (en) * 1998-07-10 2000-04-04 Marchandise Diamant Service En Cutting insert
US6935444B2 (en) 2003-02-24 2005-08-30 Baker Hughes Incorporated Superabrasive cutting elements with cutting edge geometry having enhanced durability, method of producing same, and drill bits so equipped
US7188692B2 (en) 2003-02-24 2007-03-13 Baker Hughes Incorporated Superabrasive cutting elements having enhanced durability, method of producing same, and drill bits so equipped
WO2010083015A1 (en) * 2009-01-13 2010-07-22 Diamond Innovations, Inc. Radial tool with superhard cutting surface
CN102301092A (en) * 2009-01-13 2011-12-28 戴蒙得创新股份有限公司 Radial tool with superhard cutting surface
CN102301092B (en) * 2009-01-13 2015-04-29 戴蒙得创新股份有限公司 Radial tool with superhard cutting surface
US8789894B2 (en) 2009-01-13 2014-07-29 Diamond Innovations, Inc. Radial tool with superhard cutting surface
CN102699555A (en) * 2012-06-19 2012-10-03 中煤科工集团西安研究院 Transitional connection piece of polycrystalline diamond clad sheet and drill bit matrix and connection process for transitional connection piece
US9593577B2 (en) 2012-09-28 2017-03-14 Element Six Gmbh Pick tool having a super-hard planar strike surface
GB2508271B (en) * 2012-09-28 2017-06-07 Element Six Gmbh Pick tool, assembly comprising same and method for making same
GB2508271A (en) * 2012-09-28 2014-05-28 Element Six Gmbh Planar rock pick strike member
WO2014186293A1 (en) * 2013-05-16 2014-11-20 Us Synthetic Corporation Shear cutter pick milling system
US11156087B2 (en) 2013-05-16 2021-10-26 Apergy Bmcs Acquisition Corporation Pick including polycrystalline diamond compact
WO2014186212A1 (en) * 2013-05-16 2014-11-20 Us Synthetic Corporation Road-removal system employing polycrystalline diamond compacts
US10316660B2 (en) 2013-05-16 2019-06-11 Apergy Bmcs Acquisition Corporation Pick including polycrystalline diamond compact
US10323514B2 (en) 2013-05-16 2019-06-18 Us Synthetic Corporation Shear cutter pick milling system
US11926972B2 (en) 2013-05-16 2024-03-12 Us Synthetic Corporation Shear cutter pick milling system
USD860275S1 (en) 2013-05-16 2019-09-17 Apergy Bmcs Acquisition Corporation Cutting tool
US9434091B2 (en) 2013-05-16 2016-09-06 Us Synthetic Corporation Road-removal system employing polycrystalline diamond compacts
US11585215B2 (en) 2013-05-16 2023-02-21 Us Synthetic Corporation Pick including polycrystalline diamond compact
US11015303B2 (en) 2013-05-16 2021-05-25 Us Synthetic Corporation Shear cutter pick milling system
US10414069B2 (en) 2014-04-30 2019-09-17 Us Synthetic Corporation Cutting tool assemblies including superhard working surfaces, material-removing machines including cutting tool assemblies, and methods of use
US11078635B2 (en) 2014-04-30 2021-08-03 Apergy Bmcs Acquisition Corporation Cutting tool assemblies including superhard working surfaces, material-removing machines including cutting tool assemblies, and methods of use
US11021953B1 (en) 2014-07-29 2021-06-01 Apergy Bmcs Acquisition Corporation Material-removal systems, cutting tools therefor, and related methods
US10408057B1 (en) 2014-07-29 2019-09-10 Apergy Bmcs Acquisition Corporation Material-removal systems, cutting tools therefor, and related methods
US10648330B1 (en) 2015-09-25 2020-05-12 Us Synthetic Corporation Cutting tool assemblies including superhard working surfaces, cutting tool mounting assemblies, material-removing machines including the same, and methods of use

Also Published As

Publication number Publication date
FR2602541B3 (en) 1989-05-26
AU600501B2 (en) 1990-08-16
GB8718896D0 (en) 1987-09-16
DE8710722U1 (en) 1987-10-15
FR2602541A1 (en) 1988-02-12
BE1000203A4 (en) 1988-08-23
AU7673287A (en) 1988-02-18
GB2193740B (en) 1990-04-04

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PCNP Patent ceased through non-payment of renewal fee

Effective date: 19950810