WO2000036264A1 - Tool component - Google Patents

Tool component Download PDF

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Publication number
WO2000036264A1
WO2000036264A1 PCT/IB1999/001987 IB9901987W WO0036264A1 WO 2000036264 A1 WO2000036264 A1 WO 2000036264A1 IB 9901987 W IB9901987 W IB 9901987W WO 0036264 A1 WO0036264 A1 WO 0036264A1
Authority
WO
WIPO (PCT)
Prior art keywords
tool component
cutting edge
component according
tool
region
Prior art date
Application number
PCT/IB1999/001987
Other languages
French (fr)
Inventor
Phillip Alexander Bex
Klaus Tank
Original Assignee
De Beers Industrial Diamond Division (Proprietary) Limited
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 (Proprietary) Limited filed Critical De Beers Industrial Diamond Division (Proprietary) Limited
Priority to AU15794/00A priority Critical patent/AU1579400A/en
Publication of WO2000036264A1 publication Critical patent/WO2000036264A1/en

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00—Drill bits
    • E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
    • E21B10/56—Button-type inserts
    • E21B10/567—Button-type inserts with preformed cutting elements mounted on a distinct support, e.g. polycrystalline inserts
    • E21B10/5676—Button-type inserts with preformed cutting elements mounted on a distinct support, e.g. polycrystalline inserts having a cutting face with different segments, e.g. mosaic-type inserts
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00—Drill bits
    • E21B10/006—Drill bits providing a cutting edge which is self-renewable during drilling
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2999/00—Aspects linked to processes or compositions used in powder metallurgy

Definitions

  • This invention relates to a tool component.
  • Abrasive compacts are used extensively in cutting, milling, grinding, drilling and other abrasive operations.
  • the abrasive compacts consist of a mass of diamond or cubic boron nitride particles bonded into a coherent, hard conglomerate.
  • the abrasive particle content of abrasive compacts is high and there is an extensive amount of particle-to-particle bonding creating a polycrystalline mass.
  • Abrasive compacts are made under elevated temperature and pressure conditions at which the abrasive particle, be it diamond or cubic boron nitride, is crystallographically stable.
  • Abrasive compacts are also known as polycrystalline diamond or PCD and polycrystalline cubic boron nitride or PCBN.
  • Abrasive compacts tend to be brittle and in use they are frequently supported by being bonded to a cemented carbide substrate. Such supported abrasive compacts are known in the art as composite abrasive compacts. The composite abrasive compact may be used as such in the working surface of an abrasive tool.
  • EP 0,278,103 describes a composite abrasive compact comprising an abrasive compact layer bonded to a cemented carbide substrate
  • the abrasive compact layer comprises, in one embodiment, alternating strips containing different abrasive particles which can be severed to produce diamond-shaped tool components having cutting points of different properties
  • the difference in the abrasive properties of the diamond-shaped tool components may be achieved using the same abrasive particles, but of ditterent size
  • a tool component comprises an abrasive compact bonded to a support, the abrasive compact having a working surface presenting a cutting edge and a plurality ot regions, each region differing in particle size from its immediate neighbour and each region having a surface coincident with the working surface and at least one region having an edge coincident with the cutting edge
  • plurality of regions is meant more than two regions
  • the plurality of alternating regions may extend across the ent ⁇ e woiking surface and the cutting edge Alternatively, the plurality of alternating regions may extend acioss a portion only of the working surface and the entire cutting edge Still further, the plurality of alternating regions may extend across the entire working surface and a portion only of the cutting edge At least one region has an edge coincident with the cutting edge It is preferred, however, that each region has an edge coincident with the cutting edge
  • each region may take a variety of forms
  • each region has the form of a strip with parallel sides
  • a plurality of strips may be provided in one direction only or some strips may be provided at right angles to others creating a cross-hatch or grid-like configuration
  • each region has a U-shape and the edges of the U are coincident with the cutting edge
  • the regions take the form of concentric rings
  • the outer most concentric ring w ill provide a cutting edge tor the component In use, this cutting edge will wear to a point where other regions will also provide edges coincident with the now worn cutting edge
  • the tool component may be of a shape which provides major surfaces on each of opposite sides thereof, e g disc-shape w ith one ot the major surfaces being the working surface An edge of that working surface will be the cutting edge for the tool component
  • the tool component may also be rod-shaped having a longitudinal axis and a transverse axis, the abiasive compact being bonded to the support along an interface that lies in 01 parallel to the longitudinal axis and the cutting edge being piovided by an edge on an end of the component
  • the alternating legions ot the abi asive compact may be strips disposed longitudinally in the component The sides ot such strips may be disposed at any desired angle to the interface, e.g. at right angles to the interface.
  • the abrasive compact may be located in a recess formed in one end of the support which is rod or cylindrical shaped.
  • the abrasive compact is bonded to a support which will typically be a cemented carbide support.
  • the cemented carbide of the support may be any known in the art such as cemented tungsten carbide, cemented titanium carbide or cemented tantalum carbide.
  • the abrasive compact will generally be a diamond or cubic boron nitride abrasive compact.
  • the working surface of the abrasive compact may have a thin layer of a hard material such as diamond or abrasive compact provided across at least a portion thereof.
  • Each region differs from its immediate neighbour in panicle size.
  • different wear rates of the working surface, or edge will take place, depending on the particle size of the region.
  • a groove or claw-type configuration can thus develop in use.
  • a tool comprising a support and a tool component as described above mounted on the support so as to present its cutting edge as a cutting edge for the tool
  • the support for example, be a shank or shaft for a cutting tool or mining pick, or a bit for a drill
  • a method of making an abrasive compact as described above includes the steps of providing one set of strips comprising a mass of abrasive pai tides in an organic binder, pi oviding a second set of strips of abrasive particles differing in size from those of the first set, in an organic binder placing the strips in an arrangement such that strips from one set alternate with those of the other set, removing the organic binder from the strips and subjecting the arrangement to conditions of elevated temperature suitable to form an abrasive compact of the abra
  • the alternating arrangement of strips will preferably be placed in a cavity formed in a surface of a suitable body such as a cemented carbide bod)
  • a suitable body such as a cemented carbide bod
  • the thus loaded cemented carbide body will then be placed in the reaction zone of a high temperature/high pressuie apparatus and subjected to the elevated temperature and pressure conditions suitable to form an abrasive compact of the abrasive particles
  • the abrasive particles will generalK be diamond 01 cubic boron nitride particles and the elevated temperature and pressure conditions will be such that the abrasive particle used is ciystallogi aphically stable
  • the organic bindei will generally be capable ot decomposition 01 volatilisation on heating and will typicallv be a matenal such as a cellulose
  • the strips may be produced using a method ot the type described in Bntish Patent Specification No 1 212,681
  • the strips may, for example, have a circular or otherwise rounded cross- section or square cross-section
  • the strips with such cross-sections, on application of the required elevated temperature and pressure conditions, are squeezed into their immediate neighbours and create an irregular or fuzzy type of interface between adjacent regions
  • Figure 1 is a plan view of an embodiment of a tool component of the invention
  • Figure 2 is a section along the line 2-2 of Figure 1 ,
  • Figure 3 is a sectional side view of a loaded cemented carbide body suitable for producing a tool component of Figures 1 and 2.
  • Figure 4 is a perspective view of a strip for use in Figure 3.
  • Figure 5 is a sectional side view of Figure 1 , after the application of the conditions necessary foi compact formation.
  • Figure 6 is a plan view of a second embodiment of a tool component of the invention.
  • Figure 7 is a plan view ot a further embodiment of a tool component of the invention.
  • Figures 8 and 9 are perspective views of two furthei embodiments of a tool component ot the invention.
  • Figure 10 is a perspective view ot a portion of a cutting tool having a tool component of the invention mounted thereon.
  • Figures 1 1 and 12 are sectional side views ot a tool component in various stages ot manufacture
  • Figures 13 and 14 are perspective views of further embodiments of a tool component of the invention
  • a tool component is disc-shaped and comprises a cemented carbide support 10 and a compact layer 12
  • the cemented carbide support 10 is bonded to the compact layer 12 along interface
  • the interface may be planar, as illustrated, or be otherwise profiled, e g a stepped configuration
  • the compact layer 12 has an upper working surface
  • the abrasive compact layer 12 consists of a plurality of strip regions 18. 20
  • the strips 18 consist of abrasive compact made from a particle size which is finer than that of the strips 20
  • the edge 16 is the edge which w ill perform the cutting oi othei abrasive action Wear ot the abrasive compact layer will occur during use
  • the regions 18 with the finer abrasive particles are more abrasion lesistant than the regions 20 with the coarsei particles
  • the regions 20 will wear quicker than the regions 18 giving rise, in use. to a claw-like profile
  • Such a profile is advantageous for many applications
  • Figuie 10 An example of the manner in which a tool component of Figuies 1 and 2 can be mounted on the shaft ot a cutting tool is illustrated by Figuie 10
  • the tool component 80 is mounted in a lecess 82 at the end of a shaft or support 84
  • the tool component has compact regions 86 of fine abrasive particles and compact regions 88 of coarser particles
  • the upper edge 90 of the tool component performs the cutting action when the tool is rotated in the direction of arrow 92
  • the regions 88 will wear quicker than the regions 86 giving rise, in use, to a claw-like profile
  • FIG. 1 and 2 is illustrated with two different sets of regions Additional regions with other particle sizes may be provided For example, there may be a region of fine particles, followed by a region of medium sized particles, followed by a region of coarse particles Further these regions do not have to be arranged in a strictly alternating fashion, but can be arranged in any suitable manner to suit a particular application
  • the tool component of Figures 1 and 2 may be made by a method which is illustrated schematically by Figures 3 to 5
  • a plurality of rods or sticks 22, illustrated by Figure 4. may be produced
  • the rods have a circular cross-section
  • the rods may have cross-sections of other shapes
  • These rods w ill typically comprise a mass of abrasive particles held in an organic binder such as a cellulose binder
  • the loaded cemented carbide body of Figure 3 is then placed in the reaction zone of a conventional high temperature/high pressuie apparatus and subjected to elevated tempeiature and pressure conditions
  • the elevated temperatuie and pressure conditions used are such that the organic binder will first volatilise or decompose and thereafter the abrasive particles will form an abrasive compact
  • the elevated temperature and pressure conditions will typically be temperatures of the order of 1400 to 1600°C, and pressures of the order of 50 to 70 kilobars
  • the product which is recovered from the reaction zone is illustrated by Figure 5 and comprises an abrasive compact layer having alternating regions 28. 30 filling the recess 24
  • the interfaces 32 between adjacent regions 28. 30 will be irregular This is due. at least in part, to the use of the rods which on collapsing under the elevated pressure applied du ⁇ ng compact formation create irregular interfaces 32
  • a tool component of Figuies 1 and 2 can be produced from the body of Figure 5 by removing the carbide sides, as shown by the dotted lines Alternatively, the body ot Figure 5 can be used as such as a tool insert or component
  • FIG. 1 1 and 12 Refe ⁇ An alternative method of making a tool component ot the invention is illustrated by Figures 1 1 and 12 Refe ⁇ ing to these figures, a component comprising a cemented caibide support 100 to which is bonded an abiasive compact 102 along inteitace 104 is pioduced in a conventional high temperature/high piessuie apparatus using the elevated temperatuie and pressure conditions indicated above
  • the abrasive compact comprises a first region 106 of paiticles of a particulai size and a second legion 108 of particles of a different size
  • the particles ot the region 108 are preteiabh coarser than those ot the legion 106
  • the uppei portion 110 of the legion 108 is removed, e g by lapping, along the dotted line to produce a disc-shaped tool component as illustrated by Figure 12
  • the working surface of the tool component is the major flat surface 112. and the cutting edge is provided by peripheral edge 1
  • FIG. 6 A further embodiment of the invention is illustrated by Figure 6
  • the alternating regions form U-shaped strips 34, 36 in the compact layer 38
  • the ends 34a, 36a of the strips are coincident with the edge 39, the cutting edge of the component
  • the alternating regions form concentric strips 40, 42 in the compact layer 44
  • the outer strip 42 provides a cutting edge 46 for the tool component
  • a tool component is of rod-shape and comprises a cemented carbide substrate 60 to which is bonded a compact er 62 along interface 64
  • the compact layei 62 comprises a plurality of alternating strips 66, 68
  • the strips 66 consist of abrasive compact made of a paiticle size which is finer than that ot the strips 68
  • the abrasive compact layei 62 presents a curved cutting edge 70 on one end of woikmg surface 71
  • the tool component of Figuie 8 has a longitudinal axis 72 and a transverse axis 74
  • the interface 64 lies in or parallel to the longitudinal axis 72
  • the strips 66. 68 are disposed longitudinally in the component and define a right angle with respect to the interface 64
  • the embodiment of Figure 9 is similar to that of the embodiment of Figure 8. and like parts carry like numerals
  • the difference in the Figure 9 embodiment is that the strips 66,68 define an angle other than 90° with respect to the interface 64
  • Figure 13 illustrates a further embodiment of the invention
  • a tool component is ot rod shape and comprises a cemented carbide substrate or body 120 having ends 122, 124 The end 124 has recesses formed therein
  • Abrasive compact layei s 130 are located in the recesses and are bonded to the substrate
  • the compacts 130 each comp ⁇ se a plui ahty of alternating strips 132, 134
  • the strips 132 consist of abrasive compact made of a particle size which is finer than that ot the strips 134
  • the compact layers 130 present curved working surfaces 136 and curved cutting edges 138
  • a tool component is ot rod-shape and comprises a cemented carbide substrate oi suppoi t 140 having ends 142 and 144 An annular recess is formed in the end 144 Located m this recess is a compact layer 146
  • the compact layer comprises a plurality of alternating rings 148, 150
  • the rings 148 consist of abrasive compact made of a particle size which is finer than that of the rings 150
  • the abrasive compact layer 146 presents a curved outer working surface 152 and a curved cutting edge 154

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  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
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  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Polishing Bodies And Polishing Tools (AREA)

Abstract

A tool component comprises an abrasive compact bonded (12) to a support (10), the abrasive compact having a working surface (15) presenting a cutting edge (16) and a plurality of regions (18, 20), each region differing in particle size from its immediate neighbour and each region having a surface coincident with the working surface, and at least one region having an edge coincident with the cutting edge.

Description

TOOL COMPONENT
BACKGROUND OF THE INVENTION
This invention relates to a tool component.
Abrasive compacts are used extensively in cutting, milling, grinding, drilling and other abrasive operations. The abrasive compacts consist of a mass of diamond or cubic boron nitride particles bonded into a coherent, hard conglomerate. The abrasive particle content of abrasive compacts is high and there is an extensive amount of particle-to-particle bonding creating a polycrystalline mass. Abrasive compacts are made under elevated temperature and pressure conditions at which the abrasive particle, be it diamond or cubic boron nitride, is crystallographically stable.
Abrasive compacts are also known as polycrystalline diamond or PCD and polycrystalline cubic boron nitride or PCBN.
Abrasive compacts tend to be brittle and in use they are frequently supported by being bonded to a cemented carbide substrate. Such supported abrasive compacts are known in the art as composite abrasive compacts. The composite abrasive compact may be used as such in the working surface of an abrasive tool. EP 0,278,103 describes a composite abrasive compact comprising an abrasive compact layer bonded to a cemented carbide substrate The abrasive compact layer comprises, in one embodiment, alternating strips containing different abrasive particles which can be severed to produce diamond-shaped tool components having cutting points of different properties The difference in the abrasive properties of the diamond-shaped tool components may be achieved using the same abrasive particles, but of ditterent size
SUMMARY OF THE INVENTION
According to the present invention, a tool component comprises an abrasive compact bonded to a support, the abrasive compact having a working surface presenting a cutting edge and a plurality ot regions, each region differing in particle size from its immediate neighbour and each region having a surface coincident with the working surface and at least one region having an edge coincident with the cutting edge By "plurality of regions" is meant more than two regions
The plurality of alternating regions may extend across the entπe woiking surface and the cutting edge Alternatively, the plurality of alternating regions may extend acioss a portion only of the working surface and the entire cutting edge Still further, the plurality of alternating regions may extend across the entire working surface and a portion only of the cutting edge At least one region has an edge coincident with the cutting edge It is preferred, however, that each region has an edge coincident with the cutting edge
The regions may take a variety of forms In one form of the invention, each region has the form of a strip with parallel sides A plurality of strips may be provided in one direction only or some strips may be provided at right angles to others creating a cross-hatch or grid-like configuration In another form of the invention, each region has a U-shape and the edges of the U are coincident with the cutting edge
In another form of the invention, the regions take the form of concentric rings The outer most concentric ring w ill provide a cutting edge tor the component In use, this cutting edge will wear to a point where other regions will also provide edges coincident with the now worn cutting edge
The tool component may be of a shape which provides major surfaces on each of opposite sides thereof, e g disc-shape w ith one ot the major surfaces being the working surface An edge of that working surface will be the cutting edge for the tool component
The tool component may also be rod-shaped having a longitudinal axis and a transverse axis, the abiasive compact being bonded to the support along an interface that lies in 01 parallel to the longitudinal axis and the cutting edge being piovided by an edge on an end of the component In this form ot the invention, the alternating legions ot the abi asive compact may be strips disposed longitudinally in the component The sides ot such strips may be disposed at any desired angle to the interface, e.g. at right angles to the interface. The abrasive compact may be located in a recess formed in one end of the support which is rod or cylindrical shaped.
The abrasive compact is bonded to a support which will typically be a cemented carbide support. The cemented carbide of the support may be any known in the art such as cemented tungsten carbide, cemented titanium carbide or cemented tantalum carbide.
The abrasive compact will generally be a diamond or cubic boron nitride abrasive compact.
The working surface of the abrasive compact may have a thin layer of a hard material such as diamond or abrasive compact provided across at least a portion thereof.
Each region differs from its immediate neighbour in panicle size. The larger the particle size, the less the abrasion resistance of the region. Thus, in use. different wear rates of the working surface, or edge, will take place, depending on the particle size of the region. A groove or claw-type configuration can thus develop in use.
The tool component of the invention has a variety of applications, particularly in drilling and cutting. The groove or claw-type configuration which develops, in use, assists in these applications. Thus, the invention provides, according to another aspect, a tool comprising a support and a tool component as described above mounted on the support so as to present its cutting edge as a cutting edge for the tool The support
Figure imgf000007_0001
for example, be a shank or shaft for a cutting tool or mining pick, or a bit for a drill According to yet another aspect of the invention, a method of making an abrasive compact as described above includes the steps of providing one set of strips comprising a mass of abrasive pai tides in an organic binder, pi oviding a second set of strips of abrasive particles differing in size from those of the first set, in an organic binder placing the strips in an arrangement such that strips from one set alternate with those of the other set, removing the organic binder from the strips and subjecting the arrangement to conditions of elevated temperature suitable to form an abrasive compact of the abrasive particles
The alternating arrangement of strips will preferably be placed in a cavity formed in a surface of a suitable body such as a cemented carbide bod) The thus loaded cemented carbide body will then be placed in the reaction zone of a high temperature/high pressuie apparatus and subjected to the elevated temperature and pressure conditions suitable to form an abrasive compact of the abrasive particles The abrasive particles will generalK be diamond 01 cubic boron nitride particles and the elevated temperature and pressure conditions will be such that the abrasive particle used is ciystallogi aphically stable
The organic bindei will generally be capable ot decomposition 01 volatilisation on heating and will typicallv be a matenal such as a cellulose The strips may be produced using a method ot the type described in Bntish Patent Specification No 1 212,681 The strips may, for example, have a circular or otherwise rounded cross- section or square cross-section The strips with such cross-sections, on application of the required elevated temperature and pressure conditions, are squeezed into their immediate neighbours and create an irregular or fuzzy type of interface between adjacent regions
BRIEF DESCRIPTION OF THE DRAWINGS
Figure 1 is a plan view of an embodiment of a tool component of the invention,
Figure 2 is a section along the line 2-2 of Figure 1 ,
Figure 3 is a sectional side view of a loaded cemented carbide body suitable for producing a tool component of Figures 1 and 2.
Figure 4 is a perspective view of a strip for use in Figure 3.
Figure 5 is a sectional side view of Figure 1 , after the application of the conditions necessary foi compact formation.
Figure 6 is a plan view of a second embodiment of a tool component of the invention.
Figure 7 is a plan view ot a further embodiment of a tool component of the invention.
Figures 8 and 9 are perspective views of two furthei embodiments of a tool component ot the invention.
Figure 10 is a perspective view ot a portion of a cutting tool having a tool component of the invention mounted thereon.
Figures 1 1 and 12 are sectional side views ot a tool component in various stages ot manufacture, and Figures 13 and 14 are perspective views of further embodiments of a tool component of the invention
DESCRIPTION OF EMBODIMENTS
A first embodiment of the invention will now be described with reference to Figures 1 and 2 Referring to these figures, a tool component is disc-shaped and comprises a cemented carbide support 10 and a compact layer 12 The cemented carbide support 10 is bonded to the compact layer 12 along interface
14 The interface may be planar, as illustrated, or be otherwise profiled, e g a stepped configuration The compact layer 12 has an upper working surface
15 and a peripheral working or cutting edge 16
The abrasive compact layer 12 consists of a plurality of strip regions 18. 20 The strips 18 consist of abrasive compact made from a particle size which is finer than that of the strips 20
In use, the edge 16 is the edge which w ill perform the cutting oi othei abrasive action Wear ot the abrasive compact layer will occur during use The regions 18 with the finer abrasive particles are more abrasion lesistant than the regions 20 with the coarsei particles Thus, the regions 20 will wear quicker than the regions 18 giving rise, in use. to a claw-like profile Such a profile is advantageous for many applications
An example of the manner in which a tool component of Figuies 1 and 2 can be mounted on the shaft ot a cutting tool is illustrated by Figuie 10 Referring to this figui e, the tool component 80 is mounted in a lecess 82 at the end of a shaft or support 84 The tool component has compact regions 86 of fine abrasive particles and compact regions 88 of coarser particles The upper edge 90 of the tool component performs the cutting action when the tool is rotated in the direction of arrow 92 The regions 88 will wear quicker than the regions 86 giving rise, in use, to a claw-like profile
The embodiment of Figures 1 and 2 is illustrated with two different sets of regions Additional regions with other particle sizes may be provided For example, there may be a region of fine particles, followed by a region of medium sized particles, followed by a region of coarse particles Further these regions do not have to be arranged in a strictly alternating fashion, but can be arranged in any suitable manner to suit a particular application
The tool component of Figures 1 and 2 may be made by a method which is illustrated schematically by Figures 3 to 5 Referring to these figures, a plurality of rods or sticks 22, illustrated by Figure 4. may be produced The rods have a circular cross-section The rods may have cross-sections of other shapes These rods w ill typically comprise a mass of abrasive particles held in an organic binder such as a cellulose binder A plurality ot such rods aie located in a recess 24 formed in a cemented carbide body 26 These rods aie so arranged that rods 28 utilising tine abrasive particles alternate with rods 30 utilising coarse abrasive particles
The loaded cemented carbide body of Figure 3 is then placed in the reaction zone of a conventional high temperature/high pressuie apparatus and subjected to elevated tempeiature and pressure conditions The elevated temperatuie and pressure conditions used are such that the organic binder will first volatilise or decompose and thereafter the abrasive particles will form an abrasive compact For example, if the abrasive particles are diamond particles, the elevated temperature and pressure conditions will typically be temperatures of the order of 1400 to 1600°C, and pressures of the order of 50 to 70 kilobars
The product which is recovered from the reaction zone is illustrated by Figure 5 and comprises an abrasive compact layer having alternating regions 28. 30 filling the recess 24 The interfaces 32 between adjacent regions 28. 30 will be irregular This is due. at least in part, to the use of the rods which on collapsing under the elevated pressure applied duπng compact formation create irregular interfaces 32
A tool component of Figuies 1 and 2 can be produced from the body of Figure 5 by removing the carbide sides, as shown by the dotted lines Alternatively, the body ot Figure 5 can be used as such as a tool insert or component
An alternative method of making a tool component ot the invention is illustrated by Figures 1 1 and 12 Refeπ ing to these figures, a component comprising a cemented caibide support 100 to which is bonded an abiasive compact 102 along inteitace 104 is pioduced in a conventional high temperature/high piessuie apparatus using the elevated temperatuie and pressure conditions indicated above The abrasive compact comprises a first region 106 of paiticles of a particulai size and a second legion 108 of particles of a different size The particles ot the region 108 are preteiabh coarser than those ot the legion 106 The uppei portion 110 of the legion 108 is removed, e g by lapping, along the dotted line to produce a disc-shaped tool component as illustrated by Figure 12 In this tool component, the working surface of the tool component is the major flat surface 112. and the cutting edge is provided by peripheral edge 1 14 The woi king surface has alternating regions 116 of fine abrasive particles and regions 118 of coarse abrasive particles which extend entirely across it These regions have a strip shape or form
A further embodiment of the invention is illustrated by Figure 6 In this embodiment, the alternating regions form U-shaped strips 34, 36 in the compact layer 38 The ends 34a, 36a of the strips are coincident with the edge 39, the cutting edge of the component
In the embodiment of Figure 7, the alternating regions form concentric strips 40, 42 in the compact layer 44 The outer strip 42 provides a cutting edge 46 for the tool component
A further embodiment of the invention is lllustiated by Figuie 8 Referring to this figure, a tool component is of rod-shape and comprises a cemented carbide substrate 60 to which is bonded a compact
Figure imgf000012_0001
er 62 along interface 64 The compact layei 62 comprises a plurality of alternating strips 66, 68 The strips 66 consist of abrasive compact made of a paiticle size which is finer than that ot the strips 68 The abrasive compact layei 62 presents a curved cutting edge 70 on one end of woikmg surface 71
The tool component of Figuie 8 has a longitudinal axis 72 and a transverse axis 74 The interface 64 lies in or parallel to the longitudinal axis 72 Further, the strips 66. 68 are disposed longitudinally in the component and define a right angle with respect to the interface 64 The embodiment of Figure 9 is similar to that of the embodiment of Figure 8. and like parts carry like numerals The difference in the Figure 9 embodiment is that the strips 66,68 define an angle other than 90° with respect to the interface 64
In both of the embodiments of Figures 8 and 9. wear of the cutting edge 70 will occur duπng use The regions 66 with the finer abrasive particles are more abrasion resistant than the regions 68 with the coarser particles Thus, the regions 68 will wear quicker than the regions 66 giving rise, in use, to a claw-like profile in both embodiments
In the embodiments of Figures 8 and 9 the abrasive compact layer 62 need not extend the length of the component
Figure 13 illustrates a further embodiment of the invention Referring to this figure, a tool component is ot rod shape and comprises a cemented carbide substrate or body 120 having ends 122, 124 The end 124 has recesses formed therein Abrasive compact layei s 130 are located in the recesses and are bonded to the substrate The compacts 130 each compπse a plui ahty of alternating strips 132, 134 The strips 132 consist of abrasive compact made of a particle size which is finer than that ot the strips 134 The compact layers 130 present curved working surfaces 136 and curved cutting edges 138
Yet a furthei embodiment of the invention is illustrated by Figure 14 Referring to this figure, a tool component is ot rod-shape and comprises a cemented carbide substrate oi suppoi t 140 having ends 142 and 144 An annular recess is formed in the end 144 Located m this recess is a compact layer 146 The compact layer comprises a plurality of alternating rings 148, 150 The rings 148 consist of abrasive compact made of a particle size which is finer than that of the rings 150 The abrasive compact layer 146 presents a curved outer working surface 152 and a curved cutting edge 154

Claims

1 A tool component comprising an abrasive compact bonded to a support, the abrasive compact having a working surface presenting a cutting edge and a plurality of regions, each region differing in particle size from its immediate neighbour and each region having a surface coincident with the working surface and at least one region having an edge coincident with the cutting edge
2 A tool component according to claim 1 wherein the plurality of regions extends across the entire working surface and cutting edge
3 A tool component according to claim 1 wherein the plurality of regions extends across a portion only of the working surface and the entire cutting edge
4 A tool component accoiding to claim 1 wherein the plurality of regions extends across the entire working surface and a portion only of the cutting edge
5 A tool component accoiding to any one of claim 1 to 4 wheiein each region has an edge coincident with the cutting edge
6 A tool component according to any one ot claims 1 to 5 wherein each region takes the form of a strip with parallel sides A tool component according to any one of claims 1 to 5 wherein each region has a U-shape and edges of the ends of the U are coincident with the cutting edge
A tool component according to any one of claims 1 to 4 wherein the regions take the form of concentric rings
A tool component according to any one of the preceding claims which has a shape which provides major surfaces on each of opposite sides thereof, one of the major surfaces being the working surface
A tool component according to any one of the preceding claims which is disc-shaped
A tool component according to claim 1 which is rod-shaped having a longitudinal a\ιs and a transverse axis the abrasive compact is bonded to the support along an interface that lies in or parallel to the longitudinal axis and the cutting edge is provided by an edge on an end of the component
A tool component accoiding to claim 11 wherein the alternating legions of the abrasive compact are strips disposed longitudinally in the tool component
A tool component accoiding to claim 12 wherein the sides ot the strips aie disposed at right angles to the mteiiace A tool component according to any one of the preceding claims wherein the support is a cemented carbide support
A tool component according to any one of the preceding claims wherein the abrasive compact is a diamond or cubic boron nitride abrasive compact
A tool comprising a support and a tool component according to any one of the preceding claims mounted on the support so as to present its cutting edge as a cutting edge for the tool
A tool component according to claim 1 and substantially as herein described with reference to any one of Figures 1 to 14 of the accompanying drawings
A tool of claim 16 and substantially as herein described with reference to any one of Figures 1 to 14 of the accompanying drawings
PCT/IB1999/001987 1998-12-15 1999-12-13 Tool component WO2000036264A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU15794/00A AU1579400A (en) 1998-12-15 1999-12-13 Tool component

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GBGB9827600.9A GB9827600D0 (en) 1998-12-15 1998-12-15 Abrasive product
GB9827600.9 1998-12-15

Publications (1)

Publication Number Publication Date
WO2000036264A1 true WO2000036264A1 (en) 2000-06-22

Family

ID=10844258

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IB1999/001987 WO2000036264A1 (en) 1998-12-15 1999-12-13 Tool component

Country Status (3)

Country Link
AU (1) AU1579400A (en)
GB (1) GB9827600D0 (en)
WO (1) WO2000036264A1 (en)

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WO2004040096A1 (en) * 2002-10-30 2004-05-13 Element Six (Proprietary) Limited Composite tool insert
WO2004072435A1 (en) * 2003-02-11 2004-08-26 Element Six (Pty) Ltd Cutting element
WO2012012774A3 (en) * 2010-07-23 2013-03-14 National Oilwell DHT, L.P. Polycrystalline diamond cutting element and method of using same

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EP0133124A1 (en) * 1983-07-26 1985-02-13 Michel Durand Diamond cutting segments for circular saws, in particular for cutting natural stone, and circular saw provided with such cutting segments
EP0157278A2 (en) * 1984-03-26 1985-10-09 Eastman Christensen Company Multi-component cutting element using polycrystalline diamond disks
US4604106A (en) * 1984-04-16 1986-08-05 Smith International Inc. Composite polycrystalline diamond compact
US4690691A (en) * 1986-02-18 1987-09-01 General Electric Company Polycrystalline diamond and CBN cutting tools
EP0278103A2 (en) 1987-01-12 1988-08-17 American Cyanamid Company Sustained release growth hormone compositions for parenteral administration and their use
US4861350A (en) * 1985-08-22 1989-08-29 Cornelius Phaal Tool component
EP0350045A2 (en) * 1988-07-06 1990-01-10 Baker Hughes Incorporated Drill bit with composite cutting members
EP0411831A1 (en) * 1989-08-04 1991-02-06 Camco Drilling Group Limited Cutting element for rotary drill bit with multilayer cutting surface
EP0546725A1 (en) * 1991-11-30 1993-06-16 Camco Drilling Group Limited Improvents in or relating to cutting elements for rotary drill bits
EP0554568A2 (en) * 1992-01-06 1993-08-11 Baker Hughes Incorporated Mosaic diamond drag bit cutter having a nonuniform wear pattern
EP0582484A1 (en) * 1992-08-06 1994-02-09 De Beers Industrial Diamond Division (Proprietary) Limited Tool insert
EP0853184A2 (en) * 1997-01-14 1998-07-15 Baker Hughes Incorporated Superabrasive cutting element with enhanced stiffness, thermal conductivity and cutting efficency
GB2334984A (en) * 1998-03-06 1999-09-08 Smith International Cutting element with improved material toughness

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Publication number Priority date Publication date Assignee Title
GB1212681A (en) 1966-11-18 1970-11-18 British Iron Steel Research Process for the production of metal strip from powdered metal
EP0133124A1 (en) * 1983-07-26 1985-02-13 Michel Durand Diamond cutting segments for circular saws, in particular for cutting natural stone, and circular saw provided with such cutting segments
EP0157278A2 (en) * 1984-03-26 1985-10-09 Eastman Christensen Company Multi-component cutting element using polycrystalline diamond disks
US4604106A (en) * 1984-04-16 1986-08-05 Smith International Inc. Composite polycrystalline diamond compact
US4861350A (en) * 1985-08-22 1989-08-29 Cornelius Phaal Tool component
US4690691A (en) * 1986-02-18 1987-09-01 General Electric Company Polycrystalline diamond and CBN cutting tools
EP0278103A2 (en) 1987-01-12 1988-08-17 American Cyanamid Company Sustained release growth hormone compositions for parenteral administration and their use
EP0350045A2 (en) * 1988-07-06 1990-01-10 Baker Hughes Incorporated Drill bit with composite cutting members
EP0411831A1 (en) * 1989-08-04 1991-02-06 Camco Drilling Group Limited Cutting element for rotary drill bit with multilayer cutting surface
EP0546725A1 (en) * 1991-11-30 1993-06-16 Camco Drilling Group Limited Improvents in or relating to cutting elements for rotary drill bits
EP0554568A2 (en) * 1992-01-06 1993-08-11 Baker Hughes Incorporated Mosaic diamond drag bit cutter having a nonuniform wear pattern
EP0582484A1 (en) * 1992-08-06 1994-02-09 De Beers Industrial Diamond Division (Proprietary) Limited Tool insert
EP0853184A2 (en) * 1997-01-14 1998-07-15 Baker Hughes Incorporated Superabrasive cutting element with enhanced stiffness, thermal conductivity and cutting efficency
GB2334984A (en) * 1998-03-06 1999-09-08 Smith International Cutting element with improved material toughness

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004040096A1 (en) * 2002-10-30 2004-05-13 Element Six (Proprietary) Limited Composite tool insert
CN100396878C (en) * 2002-10-30 2008-06-25 六号元素(控股)公司 Composite tool insert
WO2004072435A1 (en) * 2003-02-11 2004-08-26 Element Six (Pty) Ltd Cutting element
CN100402796C (en) * 2003-02-11 2008-07-16 六号元素(控股)公司 Cutting element
AU2004211523B2 (en) * 2003-02-11 2008-12-04 Element Six (Pty) Ltd Method of manufacturing a cutting element
US8172011B2 (en) 2003-02-11 2012-05-08 Klaus Tank Cutting element
WO2012012774A3 (en) * 2010-07-23 2013-03-14 National Oilwell DHT, L.P. Polycrystalline diamond cutting element and method of using same
CN103237617A (en) * 2010-07-23 2013-08-07 国民油井Dht公司 Polycrystalline diamond cutting element and method of using same
US8875812B2 (en) 2010-07-23 2014-11-04 National Oilwell DHT, L.P. Polycrystalline diamond cutting element and method of using same

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Publication number Publication date
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AU1579400A (en) 2000-07-03

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