GB2181472A - Cutter tools and tip inserts therefor - Google Patents

Cutter tools and tip inserts therefor Download PDF

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Publication number
GB2181472A
GB2181472A GB08521089A GB8521089A GB2181472A GB 2181472 A GB2181472 A GB 2181472A GB 08521089 A GB08521089 A GB 08521089A GB 8521089 A GB8521089 A GB 8521089A GB 2181472 A GB2181472 A GB 2181472A
Authority
GB
United Kingdom
Prior art keywords
cutting member
faces
bonded
planes
insert
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.)
Withdrawn
Application number
GB08521089A
Other versions
GB8521089D0 (en
Inventor
John Andrew Cave
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.)
Anderson Strathclyde PLC
Original Assignee
Anderson Strathclyde PLC
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 Anderson Strathclyde PLC filed Critical Anderson Strathclyde PLC
Priority to GB08521089A priority Critical patent/GB2181472A/en
Publication of GB8521089D0 publication Critical patent/GB8521089D0/en
Priority claimed from EP87302504A external-priority patent/EP0283605A1/en
Publication of GB2181472A publication Critical patent/GB2181472A/en
Withdrawn legal-status Critical Current

Links

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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28D—WORKING STONE OR STONE-LIKE MATERIALS
    • B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
    • B28D1/18—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by milling, e.g. channelling by means of milling tools
    • B28D1/186—Tools therefor, e.g. having exchangeable cutter bits
    • B28D1/188—Tools therefor, e.g. having exchangeable cutter bits with exchangeable cutter bits or cutter segments
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK 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 OR ROCK 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 OR ROCK 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

Landscapes

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

Abstract

A tip insert for a cutter tool comprises a body 10 of a wear- resistant material (e.g. cemented tungsten carbide) and a cutting member 11 comprising a more wear- resistant material (e.g. polycrystalline diamond) secured to the body, said cutting member having two flat faces disposed in intersecting planes and bonded to complementary plane faces on the body and said cutting member having exposed faces opposite to said bonded faces. <IMAGE>

Description

SPECIFICATION Cutter tools and tip inserts therefor This invention is concerned with cutter tools (particularly but not exclusively for cutting rock or other minerals) and tip inserts therefor.
It is known to provide rock cutting tools with composite tip inserts of a kind comprising a body of a wear-resistant material such as cemented tungsten carbide and a cutting member of a more wear-resistant material such as polycrystalline diamond (PCD) carried by the body. Conventionally, such a cutting member is of shallow cylindrical (i.e. disc-like) form comprising a layer of PCD bonded to a hard metal substrate. The hard metal face is secured, e.g. by brazing, to a flat face on the body. The cutting member may be entirely exposed (except for its brazed face) on the body or it may be received in an open-topped substantially circular recess in the body with a minor portion of the cutting member periphery exposed for cutting purposes.
It is an object of the present invention to provide a composite tip insert of the kind referred to which permits of recovery for re-use of worn conventional cylindrical type cutting members and which provides firmer bonding of the cutting member to the body of the insert.
According to the invention, a tip insert for a cutter tool comprises a body of a wear-resistant material and a cutting member comprising a more wear-resistant material secured to the body, said cutting member having two flat faces disposed in intersecting planes and bonded to complementary plane faces on the body and said cutting member having exposed faces opposite to said bonded faces.
Since two flat faces in different planes are bonded to the body (e.g. by brazing), the cutting member can be secured to the body more strongly than in the conventional arrangement in which only one face is bonded.
Additionally, the body offers mechanical support to the cutting member. Also, since the worn parts of conventional cylindrical type cutting members can be machined away to provide said bonded faces, it is possible to reclaim worn conventional cutting members for re-use.
Said bonded faces preferably lie in planes which intersect at an angle of 60"C.
The insert body preferably has two flat faces disposed in intersecting planes and arranged to be bonded to complementary plane faces on a tool. Said planes preferably intersect at an angle of 60"C.
The invention further provides a cutter tool having a tip insert as hereinbefore set out.
The following is a description, by way of example only, of an embodiment of the invention, reference being made to the accompanying drawings, in which Figure 1 is a perspective view from above an insert body, Figure 2 is an end view of the body, Figure 3 is a side view of the body, Figure 4 is a view from beneath the body, Figure 5 is a plan view of a cutting member, Figure 6 is a side view of the cutting member, Figure 7 is a perspective view of the insert with the cutting member bonded thereto, and Figure 8 is a side view of the insert of Fig.
7.
The insert comprises a body 10 made of cemented tungsten carbide or other wear-resistant material and a cutting member 11 comprising polycrystalline diamond or other material which is harder and more wear-resistant than the material of the body 10.
The body 10 has an open recess defined by two flat faces 12, 13 which lie in planes which intersect each other at an angle of 60"C or about 60"C. The cutting member 11 is in the form of a shallow cylinder or disc having flat opposite faces 14, 15 lying in parallel planes, with a segment removed to provide a flat end face 16 lying in a plane intersecting the planes of the faces 14, 15 at 60". The faces 14, 16 of the cutting member 11 are bonded, e.g. by brazing, to the faces 12, 13 of the body 10. The face 15 of the cutting member is then co-planar with an adjoining face 17 on the body 10, and the whole of the faces 14, 16 of the cutting member are supported by the faces 12, 13 of the body 10.
It will be understood that the cutting member 11 may be produced from a used cutting member, which was originally of true cylindrical form but which has been worn on part of its periphery, by machining away the worn part to provide the flat face 16. However, the cutting member may be originaliy formed in the shape shown in Figs. 5 and 6. Other shapes of cutting member may be used provided that there are two flat faces in intersecting planes for bonding to the body 10.
The body 10 itself has two flat faces 18, 19 in planes intersecting at an angle which is preferably of about 60 , which faces are bonded to complementary flat faces on a cutter tool. The tool may be of any suitable form, e.g. with a shank of rectangular crosssection or of frusto-conical shape, but should not be rotatably mounted in use.
1. A tip insert for a cutter tool, which insert comprises a body of a wear-resistant material and a cutting member comprising a more wear-resistant material secured to the body, said cutting member having two flat faces disposed in intersecting planes and bonded to complementary plane faces on the body and said cutting member having exposed faces opposite to said bonded faces.
2. A tip insert according to claim 1
**WARNING** end of DESC field may overlap start of CLMS **.

Claims (6)

**WARNING** start of CLMS field may overlap end of DESC **. SPECIFICATION Cutter tools and tip inserts therefor This invention is concerned with cutter tools (particularly but not exclusively for cutting rock or other minerals) and tip inserts therefor. It is known to provide rock cutting tools with composite tip inserts of a kind comprising a body of a wear-resistant material such as cemented tungsten carbide and a cutting member of a more wear-resistant material such as polycrystalline diamond (PCD) carried by the body. Conventionally, such a cutting member is of shallow cylindrical (i.e. disc-like) form comprising a layer of PCD bonded to a hard metal substrate. The hard metal face is secured, e.g. by brazing, to a flat face on the body. The cutting member may be entirely exposed (except for its brazed face) on the body or it may be received in an open-topped substantially circular recess in the body with a minor portion of the cutting member periphery exposed for cutting purposes. It is an object of the present invention to provide a composite tip insert of the kind referred to which permits of recovery for re-use of worn conventional cylindrical type cutting members and which provides firmer bonding of the cutting member to the body of the insert. According to the invention, a tip insert for a cutter tool comprises a body of a wear-resistant material and a cutting member comprising a more wear-resistant material secured to the body, said cutting member having two flat faces disposed in intersecting planes and bonded to complementary plane faces on the body and said cutting member having exposed faces opposite to said bonded faces. Since two flat faces in different planes are bonded to the body (e.g. by brazing), the cutting member can be secured to the body more strongly than in the conventional arrangement in which only one face is bonded. Additionally, the body offers mechanical support to the cutting member. Also, since the worn parts of conventional cylindrical type cutting members can be machined away to provide said bonded faces, it is possible to reclaim worn conventional cutting members for re-use. Said bonded faces preferably lie in planes which intersect at an angle of 60"C. The insert body preferably has two flat faces disposed in intersecting planes and arranged to be bonded to complementary plane faces on a tool. Said planes preferably intersect at an angle of 60"C. The invention further provides a cutter tool having a tip insert as hereinbefore set out. The following is a description, by way of example only, of an embodiment of the invention, reference being made to the accompanying drawings, in which Figure 1 is a perspective view from above an insert body, Figure 2 is an end view of the body, Figure 3 is a side view of the body, Figure 4 is a view from beneath the body, Figure 5 is a plan view of a cutting member, Figure 6 is a side view of the cutting member, Figure 7 is a perspective view of the insert with the cutting member bonded thereto, and Figure 8 is a side view of the insert of Fig. 7. The insert comprises a body 10 made of cemented tungsten carbide or other wear-resistant material and a cutting member 11 comprising polycrystalline diamond or other material which is harder and more wear-resistant than the material of the body 10. The body 10 has an open recess defined by two flat faces 12, 13 which lie in planes which intersect each other at an angle of 60"C or about 60"C. The cutting member 11 is in the form of a shallow cylinder or disc having flat opposite faces 14, 15 lying in parallel planes, with a segment removed to provide a flat end face 16 lying in a plane intersecting the planes of the faces 14, 15 at 60". The faces 14, 16 of the cutting member 11 are bonded, e.g. by brazing, to the faces 12, 13 of the body 10. The face 15 of the cutting member is then co-planar with an adjoining face 17 on the body 10, and the whole of the faces 14, 16 of the cutting member are supported by the faces 12, 13 of the body 10. It will be understood that the cutting member 11 may be produced from a used cutting member, which was originally of true cylindrical form but which has been worn on part of its periphery, by machining away the worn part to provide the flat face 16. However, the cutting member may be originaliy formed in the shape shown in Figs. 5 and 6. Other shapes of cutting member may be used provided that there are two flat faces in intersecting planes for bonding to the body 10. The body 10 itself has two flat faces 18, 19 in planes intersecting at an angle which is preferably of about 60 , which faces are bonded to complementary flat faces on a cutter tool. The tool may be of any suitable form, e.g. with a shank of rectangular crosssection or of frusto-conical shape, but should not be rotatably mounted in use. CLAIMS
1. A tip insert for a cutter tool, which insert comprises a body of a wear-resistant material and a cutting member comprising a more wear-resistant material secured to the body, said cutting member having two flat faces disposed in intersecting planes and bonded to complementary plane faces on the body and said cutting member having exposed faces opposite to said bonded faces.
2. A tip insert according to claim 1 wherein said bonded faces lie in planes which intersect at an angle of 60".
3. A tip insert according to claim 1 or claim 2 wherein the insert body has two flat faces disposed in intersecting planes and arranged to be bonded to complementary plane faces on a tool.
4. A tip insert according to claim 3 wherein said planes intersect at an angle of 60".
5. A tip insert substantially as hereinbefore described with reference to the accompanying drawings.
6. A cutter tool having a tip insert according to any preceding claim.
GB08521089A 1985-08-22 1985-08-22 Cutter tools and tip inserts therefor Withdrawn GB2181472A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB08521089A GB2181472A (en) 1985-08-22 1985-08-22 Cutter tools and tip inserts therefor

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB08521089A GB2181472A (en) 1985-08-22 1985-08-22 Cutter tools and tip inserts therefor
EP87302504A EP0283605A1 (en) 1987-03-24 1987-03-24 Cutter tool tip inserts

Publications (2)

Publication Number Publication Date
GB8521089D0 GB8521089D0 (en) 1985-09-25
GB2181472A true GB2181472A (en) 1987-04-23

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Family Applications (1)

Application Number Title Priority Date Filing Date
GB08521089A Withdrawn GB2181472A (en) 1985-08-22 1985-08-22 Cutter tools and tip inserts therefor

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GB (1) GB2181472A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2193740A (en) * 1986-08-11 1988-02-17 De Beers Ind Diamond Cutting element for a mining machine
EP0336698A2 (en) * 1988-04-05 1989-10-11 Camco Drilling Group Limited Cutting element for a rotary drill bit, and method for manufacturing such an element
EP0399221A2 (en) * 1989-05-23 1990-11-28 General Electric Company Mining pick
EP0468214A1 (en) * 1990-07-25 1992-01-29 General Electric Company Cutting insert utilizing superabrasive compacts
CN103016002A (en) * 2012-11-10 2013-04-03 中煤张家口煤矿机械有限责任公司 Planing cutter for coal plough
CN103797214A (en) * 2011-07-28 2014-05-14 第六元素研磨剂股份有限公司 Tips for pick tools and pick tools comprising same
EP2387652A4 (en) * 2009-01-13 2016-08-17 Diamond Innovations Inc Radial tool with superhard cutting surface

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2022476A (en) * 1978-04-21 1979-12-19 Christensen Inc Rotary boring bit
GB2032979A (en) * 1978-10-02 1980-05-14 Gen Electric Improved Cutter Shapes for Rock Drilling With Drag Bits
GB1576521A (en) * 1976-06-24 1980-10-08 Gen Electric Rotary drill bit
GB2096669A (en) * 1981-04-11 1982-10-20 Christensen Inc Cutting member for rotary drill bits
EP0156235A2 (en) * 1984-03-26 1985-10-02 Eastman Christensen Company Multi-component cutting element using consolidated rod-like polycrystalline diamond
EP0156264A2 (en) * 1984-03-26 1985-10-02 Eastman Christensen Company Multi-component cutting element using triangular, rectangular and higher order polyhedral-shaped polycrystalline diamond disks

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1576521A (en) * 1976-06-24 1980-10-08 Gen Electric Rotary drill bit
GB2022476A (en) * 1978-04-21 1979-12-19 Christensen Inc Rotary boring bit
GB2032979A (en) * 1978-10-02 1980-05-14 Gen Electric Improved Cutter Shapes for Rock Drilling With Drag Bits
GB2096669A (en) * 1981-04-11 1982-10-20 Christensen Inc Cutting member for rotary drill bits
EP0156235A2 (en) * 1984-03-26 1985-10-02 Eastman Christensen Company Multi-component cutting element using consolidated rod-like polycrystalline diamond
EP0156264A2 (en) * 1984-03-26 1985-10-02 Eastman Christensen Company Multi-component cutting element using triangular, rectangular and higher order polyhedral-shaped polycrystalline diamond disks

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2193740A (en) * 1986-08-11 1988-02-17 De Beers Ind Diamond Cutting element for a mining machine
GB2193740B (en) * 1986-08-11 1990-04-04 De Beers Ind Diamond Cutting tool for a mining machine
EP0336698A2 (en) * 1988-04-05 1989-10-11 Camco Drilling Group Limited Cutting element for a rotary drill bit, and method for manufacturing such an element
EP0336698A3 (en) * 1988-04-05 1990-10-31 Reed Tool Company Limited Cutting element for a rotary drill bit, and method for manufacturing such an element
GB2218134B (en) * 1988-04-05 1992-11-18 Reed Tool Co Improvements in or relating to cutting elements for rotary drill bits
EP0399221A2 (en) * 1989-05-23 1990-11-28 General Electric Company Mining pick
EP0399221A3 (en) * 1989-05-23 1991-11-27 General Electric Company Mining pick
EP0468214A1 (en) * 1990-07-25 1992-01-29 General Electric Company Cutting insert utilizing superabrasive compacts
EP2387652A4 (en) * 2009-01-13 2016-08-17 Diamond Innovations Inc Radial tool with superhard cutting surface
CN103797214A (en) * 2011-07-28 2014-05-14 第六元素研磨剂股份有限公司 Tips for pick tools and pick tools comprising same
CN103016002A (en) * 2012-11-10 2013-04-03 中煤张家口煤矿机械有限责任公司 Planing cutter for coal plough
CN103016002B (en) * 2012-11-10 2015-10-14 中煤张家口煤矿机械有限责任公司 A kind of shaping tool for coal plough

Also Published As

Publication number Publication date
GB8521089D0 (en) 1985-09-25

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WAP Application withdrawn, taken to be withdrawn or refused ** after publication under section 16(1)