WO2013027177A1 - Pic de haveuse - Google Patents

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Publication number
WO2013027177A1
WO2013027177A1 PCT/IB2012/054232 IB2012054232W WO2013027177A1 WO 2013027177 A1 WO2013027177 A1 WO 2013027177A1 IB 2012054232 W IB2012054232 W IB 2012054232W WO 2013027177 A1 WO2013027177 A1 WO 2013027177A1
Authority
WO
WIPO (PCT)
Prior art keywords
alloy
body member
shearer pick
shearer
cutting
Prior art date
Application number
PCT/IB2012/054232
Other languages
English (en)
Inventor
Graeme Mark Rivers
Original Assignee
Rivers Carbon Technologies 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 Rivers Carbon Technologies Limited filed Critical Rivers Carbon Technologies Limited
Priority to AU2012298166A priority Critical patent/AU2012298166A1/en
Publication of WO2013027177A1 publication Critical patent/WO2013027177A1/fr

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C9/00—Alloys based on copper
    • C22C9/06—Alloys based on copper with nickel or cobalt as the next major constituent
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
    • C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
    • C22F1/08—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of copper or alloys based thereon
    • 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

Definitions

  • the present invention relates to a shearer pick. More particularly but not exclusively it relates to a shearer pick for use on a rotating cutting head of a coal mining apparatus.
  • Shearer picks are well known in the mining industry, and in particular in die coal mining industry.
  • Face cutting machines are well known in the coal mining industry. These typically comprise a track arrangement on which a cutting head reciprocates along a cutting face.
  • the cutting head comprises a plurality of shearer picks extending from a rotating body, and rotates to causing the shearer picks to impact against the coal seam to rip or cut chunks of coal from the seam.
  • Such shearer picks usually comprise a steel (or ferrous based) body, on which is mounted a cutting tip made of a very hard wearing material, such as tungsten carbide.
  • coal seams may not be typically homogenous in nature, and occasionally impact of the tungsten carbide tip with hard impurities, or even dykes etc. in the coal seam can cause the tungsten carbide dp to break off, exposing the steel body underneath. When the steel body impacts against such impurities, this can cause a spark to be emitted at the cutting face.
  • the present invention may be said to broadly consist in a shearer pick for use on a cutting head of a mining apparatus for impacting a mining face, said shearer pick comprising
  • body member is adapted to securely hold said cutting tip in position operationally on said cutting head for impacting said mining face
  • the alloy comprises at least 70% Copper and 30% or less of Nickel.
  • the alloy comprises at least 80% Copper and 20% or less of Nickel.
  • the alloy comprises at least 90% Copper and 10% or less of Nickel.
  • the alloy comprises at least 95% Copper and 5% or less of Nickel.
  • the alloy comprises at least 97% Copper and 3% or less of Nickel.
  • the alloy comprises at least 5% or less Chromium.
  • the alloy comprises at least 5% or less Silicon.
  • the alloy comprises at least 5% or less Vanadium.
  • the alloy comprises at least 10% or less Iron.
  • the alloy comprises at least 5% or less Manganese.
  • the alloy comprises at least 10% or less Aluminium.
  • the alloy comprises at least 5% or less Tungsten.
  • the alloy comprises at least 5% or less Tin.
  • the alloy comprises at least 5% or less Silver.
  • the alloy comprises at least 5% or less Magnesium.
  • the alloy comprises at least 5% or less Cadmium.
  • the alloy comprises at least 2% or less Cobalt.
  • the alloy comprises at least 2% or less Lithium.
  • the alloy comprises at least 5% or less Beryllium.
  • the alloy comprises between 0.5% and 2.5% Beryllium.
  • the alloy comprises between 1.8 and 2% Beryllium.
  • the alloy is the material sold as Moldstar® 90 by Performance Alloys® at N116W18515 Morse Drive, Germantown, WI53022 (see www.performancealloys.net)
  • the alloy is the material sold as Moldstar® 150 by Performance Alloys® at N116W18515 Morse Drive, Germantown, WI 53022 (see www.performanceallovs.net)
  • the alloy comprises around 91% Copper, 6.7% Nickel, 1.8% Silicon and 0.5 Chrome.
  • the alloy comprises around 91% Copper, 6.7% Nickel, 1.8% Silicon and 0.5 Chrome, with each element being variable by about 5%.
  • the body member is comprised of an alloy diat has been heat treated.
  • the body member is comprised of an alloy that has been heat treated by annealing.
  • the body member is comprised of an alloy that has been heat treated by quenching.
  • the body member is comprised of an alloy that has been cold worked.
  • the cold working is above 10%
  • the cold working is above 15%.
  • the cold working is above 20%.
  • the body member is secured or securable to the cutting tip member by a securing arrangement.
  • the securing arrangement is a bonding layer.
  • the bonding layer is one or more selected from a solder layer, a brazing layer, a weld and a resin layer.
  • the securing arrangement comprises securing formations.
  • the securing formations comprise one or more selected from at least one or more engaging member and at least one or more fastener.
  • the engaging member is configured for engaging with the cutting tip member to present it in a particular position and/or orientation with respect to the body member.
  • the fastener is for securing one or more selected from the engaging member and cutting tip member in position.
  • the fastener is a quick release fastener.
  • the cutting tip can be conveniently disengaged from the body member.
  • the cutting tip can be conveniently disengaged from the body member by loosening the fastener.
  • the cutting tip can be conveniently disengaged from the body member by loosening the fastener to release the engaging member.
  • the cutting tip member comprises fastening formations by which it can be fastened to the body member.
  • the cutting tip member is directly fastened to the body member by a fastener.
  • the fastener comprises threaded formations.
  • the fastener is one or more selected from
  • the cutting tip member comprises one or more locating formations for locating the cutting dp member in position relative to said body member.
  • the cutting tip member comprises locating formations for engagement with complementary locating formations on the body member for locating the cutting tip member in position relative to said body member.
  • the locating formations are configured for locating the cutting tip to prevent movement of the cutting tip member relative to the body member in at least one or more dimensions.
  • the locating formations are substantially wedge shaped.
  • the complementary locating formations are also substantially wedge shaped.
  • the body member comprises engaging formations for securely engaging with a cutting head of a mining and/or tunnelling apparatus in order to remove material from a cutting face.
  • the cutting head is rotatable.
  • the alloy has a tensile strength of between 600MPa and 7200MPa More preferably, the alloy has a tensile strength of between 700MPa and lOOOMPa. More preferably, the alloy has a tensile strength of between 800MPa and 970 MPa. Preferably, the alloy has a compressive strength of between 600 MPa and 900MPa. More preferably, the alloy has a compressive strength of between 700 MPa and
  • the alloy has a compressive strength of between 723 MPa and 760MPa
  • the alloy has an elongation characteristic of between 5-7% elastic deformation.
  • the alloy has a Brinell hardness rating of between 200-300.
  • d e alloy has a Brinell hardness rating of between 260-280.
  • the invention may be said to consist in a method of manufacture of a shearer pick, comprising the steps of
  • the method comprises the step of adding, in a ratio of 10% or less, one or more selected from:
  • the method comprises the step of adding, in a ratio of 5% or less, one or more selected from:
  • the method comprises the step of adding, in a ratio of 2% or less, one or more selected from:
  • the method comprises the step of providing a molten alloy composed of 91% Copper, 6.7% Nickel, 1.8% Silicon and 0.5 Chrome.
  • the molten alloy comprises around 91% Copper, 6.7% Nickel, 1.8%
  • the step of providing an alloy comprises the step of providing an alloy as described in one or more selected from
  • the method comprises the step of casting the molten alloy as a body member.
  • the mediod comprises the step of pouring the molten alloy into a mould of a body member
  • the method may comprise the step of
  • the method comprises the step of removing the body member from the mould.
  • the method comprises the step of allowing the molten alloy to cool to an alloy stock member.
  • the method comprises the step of rolling the molten alloy into a plate.
  • the method comprises the step of quenching the cooling molten alloy.
  • die step of quenching is by one or more selected from air quenching, oil quenching and water quenching.
  • the method comprises the step of annealing the cooled alloy.
  • the method comprises the step of cold working and/ or cold rolling the alloy stock member.
  • the cold working is above 10%
  • the cold working is above 15%.
  • the cold working is above 20%.
  • the method comprises the step of machining a body member from the alloy stock member.
  • the step of machining comprises cutting a body member from the alloy stock member.
  • the step of machining comprises cutting a body member from the alloy stock member by water jet cutting.
  • the step of machining comprises cutting a body member from the alloy stock member by milling.
  • the step of machining comprises cutting a body member from the alloy stock member by laser cutting.
  • the method includes the step of bonding a cutting tip member with the body member.
  • the step of bonding comprises soldering the cutting tip member to the body member.
  • the method includes the step of
  • the method comprises the steps of coupling a cutting tip member to the cast body member.
  • the step of coupling the body member to the cutting tip is by forming at least one cutting tip receiving formation into the body member.
  • the step of coupling the body member to the cutting tip is by inserting the cutting tip member into the cutting tip receiving formation.
  • the step of coupling the body member to the cutting tip is by securely engaging the cutting tip with the body member.
  • the cutting tip member comprises fastening formations by which it can be fastened to a body member.
  • the step of coupling the body member to the cutting tip includes the steps of providing a fastener, and securely fastening the cutting tip member to the body member.
  • the cutting tip member comprises one or more locating formations for location with complementary locating formations on the body member, and the method comprises the step of locating said locating formations with the complementary locating formations to thereby prevent relative movement of the cutting tip member relative to the body member in at least one or more dimensions.
  • the step of coupling the body member to the cutting tip includes the steps of providing an engaging member for engaging with the cutting tip member to present it in a particular position and/or orientation with respect to the body member, and fastening the engaging member and cutting tip member in position relative to each other with the fastener.
  • the invention may be said to consist in the use of an alloy for the production of a body member of a shearer pick, wherein the alloy comprises by weight
  • the alloy comprises at least 70% Copper and 30% or less of Nickel.
  • the alloy comprises at least 80% Copper and 20% or less of Nickel.
  • the alloy comprises at least 90% Copper and 10% or less of Nickel.
  • the alloy comprises at least 95% Copper and 5% or less of Nickel.
  • the alloy comprises at least 97% Copper and 3% or less of Nickel.
  • the alloy comprises at least 5% or less Chromium.
  • the alloy comprises at least 5% or less Silicon.
  • the alloy comprises at least 5% or less Vanadium.
  • the alloy comprises at least 10% or less Iron.
  • the alloy comprises at least 5% or less Manganese.
  • the alloy comprises at least 10% or less Aluminium.
  • the alloy comprises at least 5% or less Tungsten.
  • the alloy comprises at least 5% or less Tin.
  • the alloy comprises at least 5% or less Silver.
  • the alloy comprises at least 5% or less Magnesium.
  • the alloy comprises at least 5% or less Cadmium.
  • the alloy comprises at least 2% or less Cobalt.
  • the alloy comprises at least 2% or less Lithium.
  • the alloy comprises at least 5% or less Beryllium.
  • the alloy comprises between 0.5% and 2.5% Beryllium.
  • the alloy comprises between 1.8 and 2% Beryllium.
  • the alloy comprises around 91% Copper, 6.7% Nickel, 1.8% Silicon and 0.5 Chrome.
  • the alloy comprises around 91% Copper, 6.7% Nickel, 1.8% Silicon and 0.5 Chrome, with each element being variable by about 5%.
  • the alloy is the material sold as Moldstar® 90 by Performance Alloys® at N116W18515 Morse Drive, Germantown, WI53022 (see www. p er formanceallo s .net)
  • die alloy is the material sold as Moldstar® 150 by Performance Alloys® at N116W18515 Morse Drive, Germantown, WI53022 (see www.performancealloys.net)
  • the alloy comprises a composition as described in US 5,020,770 and it's cited references.
  • the alloy comprises a composition as described in US 4,191,601 and it's cited references.
  • the alloy comprises a composition as described in US 3,988,17 and it's cited references.
  • the alloy has been quenched.
  • the alloy has been heat treated.
  • the alloy has been heat treated by annealing.
  • the alloy has been heat treated by quenching.
  • the alloy has been cold worked.
  • the cold working is above 10%
  • the cold working is above 15%.
  • the cold working is above 20%.
  • the alloy has a tensile strength of between 600MPa and 7200MPa More preferably, the alloy has a tensile strength of between 700MPa and lOOOMPa. More preferably, the alloy has a tensile strength of between 800MPa and 970 MPa. Preferably, the alloy has a compressive strength of between 600 MPa and 900MPa. More preferably, the alloy has a compressive strength of between 700 MPa and 800MPa.
  • the alloy has a compressive strength of between 723 MPa and 760MPa
  • the alloy has an elongation characteristic of between 5-7% elastic deformation.
  • the alloy has a Brinell hardness rating of between 200-300.
  • the alloy has a Brinell hardness rating of between 260-280.
  • the invention may be said to consist in a method of manufacture of a shearer pick body member comprising the steps of
  • the invention may be said to consist in a cutting head on a subterranean cutting apparatus, the cutting head comprising at least one shearer pick body member as described above.
  • the cutting head comprises a plurality of shearer pick body members.
  • the cutting head is a rotatable cutting head.
  • the invention may be said to consist in a cutting head on a subterranean cutting apparatus, the cutting head comprising at least one shearer pick as described above.
  • the cutting head comprises a plurality of shearer picks.
  • the cutting head is a rotatable cutting head.
  • a subterranean cutting apparatus comprising a cutting head as described above.
  • the present invention may be said to broadly consist in a shearer pick body member for use on a cutting head of a mining apparatus for impacting a mining face, said shearer pick comprising
  • a body member • a body member; said body member being adapted and configured for being secured to a cutting tip member suitable for impacting operationally with said mining face, to thereby dislodge material to be mined from said mining face;
  • body member is adapted to securely hold said cutting tip in position operationally on said cutting head for impacting said mining face
  • the alloy comprises at least 70% Copper and 30% or less of Nickel.
  • the alloy comprises at least 80°/ ⁇ Copper and 20% or less of Nickel.
  • the alloy comprises at least 90°/ ⁇ Copper and 10% or less of Nickel.
  • the alloy comprises at least 95°/ ⁇ Copper and 5% or less c f Nickel.
  • the alloy comprises at least 97°/ o Copper and 3% or less c f Nickel.
  • the alloy comprises at least 5% or less Chromium.
  • the alloy comprises at least 5% or less Silicon.
  • the alloy comprises at least 5% or less Vanadium.
  • the alloy comprises at least 10% or less Iron.
  • the alloy comprises at least 5% or less Manganese.
  • the alloy comprises at least 10% or less Aluminium.
  • the alloy comprises at least 5% or less Tungsten.
  • the alloy comprises at least 5% or less Tin.
  • the alloy comprises at least 5% or less Silver.
  • the alloy comprises at least 5% or less Magnesium.
  • the alloy comprises at least 5% or less Cadmium.
  • the alloy comprises at least 2% or less Cobalt.
  • the alloy comprises at least 2% or less Lithium.
  • the alloy comprises at least 5% or less Beryllium.
  • the alloy comprises between 0.5% and 2.5% Beiyllium.
  • the alloy comprises between 1.8 and 2% Beryllium.
  • the alloy is the material sold as Moldstar® 90 by Performance Alloys® at N116W18515 Morse Drive, Germantown, WI53022 (see www.performancealloys.net)
  • the alloy is the material sold as Moldstar®150 by Performance Alloys® at N116W18515 Morse Drive, Germantown, WI53022 (see www.performancealloys.net)
  • the alloy comprises around 91% Copper, 6.7% Nickel, 1.8% Silicon and 0.5 Chrome.
  • the alloy comprises around 91% Copper, 6.7% Nickel, 1.8% Silicon and 0.5 Chrome, with each element being variable by about 5%.
  • the body member is comprised of an alloy that has been heat treated.
  • the body member is comprised of an alloy that has been heat treated by annealing.
  • the body member is comprised of an alloy that has been heat treated by quenching.
  • the body member is comprised of an alloy that has been cold worked.
  • the cold working is above 10%
  • the cold working is above 15%.
  • the cold working is above 20%.
  • the body member is secured or securable to the cutting tip member by a securing arrangement.
  • the securing arrangement is a bonding layer.
  • the bonding layer is one or more selected from a solder layer, a brazing layer, a weld and a resin layer.
  • the securing arrangement comprises securing formations.
  • the securing formations comprise one or more selected from at least one or more engaging member and at least one or more fastener.
  • the engaging member is configured for engaging with the cutting tip member to present it in a particular position and/ or orientation with respect to the body member.
  • the fastener is for securing one or more selected from the engaging member and cutting tip member in position.
  • the fastener is a quick release fastener.
  • the cutting tip can be conveniently disengaged from the body member.
  • the cutting tip can be conveniently disengaged from the body member by loosening the fastener.
  • the cutting tip can be conveniently disengaged from the body member by loosening the fastener to release the engaging member.
  • the cutting tip member comprises fastening formations by which it can be fastened to the body member.
  • the cutting tip member is direcdy fastened to the body member by a fastener.
  • the fastener comprises threaded formations.
  • the fastener is one or more selected from
  • die cutting tip member comprises one or more locating formations for locating the cutting tip member in position relative to said body member.
  • the cutting tip member comprises locating formations for engagement with complementary locating formations on the body member for locating the cutting tip member in position relative to said body member.
  • the locating formations are configured for locating the cutting tip to prevent movement of the cutting tip member relative to the body member in at least one or more dimensions.
  • the locating formations are substantially wedge shaped.
  • the complementary locating formations are also substantially wedge shaped.
  • d e body member comprises engaging formations for securely engaging with a cutting head of a mining and/or tunnelling apparatus in order to remove material from a cutting face.
  • the cutting head is rotatable.
  • the alloy has a tensile strength of between 600MPa and 7200MPa More preferably, the alloy has a tensile strength of between 700MPa and lOOOMPa. More preferably, the alloy has a tensile strength of between 800MPa and 970 MPa. Preferably, the alloy has a compressive strength of between 600 MPa and 900MPa. More preferably, the alloy has a compressive strength of between 700 MPa and 800MPa. More preferably, the alloy has a compressive strength of between 723 MPa and 760MPa
  • the alloy has an elongation characteristic of between 5-7% elastic deformation.
  • the alloy has a Brinell hardness rating of between 200-300.
  • the alloy has a Brinell hardness rating of between 260-280.
  • the invention may be broadly said to consist in a cutting assembly of, or for, a cutting head, the assembly comprising or including
  • a sacrificial cutter of hard material e.g. a carbide
  • an alloy mount able to present the cutter the mount being adapted for attachment to or from the or a cutting head, or being attached to or from the or a cutting head;
  • the mount is of an alloy of low spark generation when compared to a high ferrous content alloy, is low in, or substantially free of, ferrous content, and is high in copper content, or has a high copper content and a nickel content.
  • the cutting head is rotatable.
  • the alloy has copper as by far its greatest content.
  • the copper content is greater than 80% w/w (more preferably greater than 90% w/w).
  • the nickel content is greater than 2% w/w but less than 10% w/w.
  • the alloy comprises around 91% Copper, 6.7% Nickel, 1.8% Silicon and 0.5 Chrome.
  • the alloy comprises around 91% Copper, 6.7% Nickel, 1.8% Silicon and 0.5 Chrome, with each element being variable by about 5%.
  • the alloy mount at least in part embeds the cutter.
  • the alloy is more ductile and malleable than the cutter material.
  • the cutter material can be considered britde with respect to the alloy.
  • the alloy of the mount is the only material of the mount.
  • the alloy mount in use is to erode in advance of any material of the cutting head in normal usage yet to at least in part to be protected against excessive erosion by the material(s) of the cutter.
  • the invention may be broadly said to consist in a profiled cutter assembly or fabrication adapted, or to be adapted, to act on a subterranean formation, the assembly or fabrication comprising or including
  • alloy mass(es) is (are) high in copper, optionally includes nickel, includes less than 10% w/w other optional inclusions.
  • the cutter assembly is rotatable.
  • the alloy mass(es) comprise greater than 90% w/w copper.
  • the alloy mass(es) comprises at least 5% or less Beryllium.
  • the alloy mass(es) comprises between 0.5% and 2.5% Beryllium. Most preferably, the alloy mass(es) comprises between 1.8 and 2% Beryllium.
  • the alloy comprises around 91% Copper, 6.7% Nickel, 1.8% Silicon and 0.5 Chrome.
  • the alloy comprises around 91% Copper, 6.7% Nickel, 1.8%
  • the alloy mass(es) are low in or devoid of ferrous content.
  • the alloy mass(es) are low in or devoid of aluminium content.
  • the invention may be broadly said to consist in a shearer pick as described with or without reference to the figures.
  • the invention may be broadly said to consist in a body member for a shearer pick as described with or without reference to the figures.
  • the invention may be broadly said to consist in a cutting head for a subterranean cutting apparatus as described with or without reference to the figures. In another aspect, the invention may be broadly said to consist in a subterranean cutting apparatus as described with or without reference to the figures.
  • Figure 1 shows a side cross sectional view of a first embodiment of a shearer pick 100
  • Figure 2 shows a mining apparatus and rotating cutting head utilising shearer picks
  • Figure 3 shows a front view of a second embodiment of a shearer pick
  • Figure 4 shows a back perspective view of a shearer pick of figure 3
  • Figure 5 shows a front perspective view of a shearer pick of figure 3;
  • Figure 6 shows a perspective assembly view of a shearer pick
  • Figure 7 shows a perspective view of the assembled shearer pick of figure 6.
  • a shearer pick according to a first aspect of the invention is generally indicated by the numeral 100.
  • a shearer pick 100 for use on a cutting head 500 of a subterranean cutting apparatus 600 (for example for mining, tunnelling or pipe jacking) for impacting a cutting, boring, tunnelling or mining face 700.
  • the cutting head may be a rotating cutting head, or any other suitable cutting head 500.
  • the shearer pick 100 comprises a body member 110; and a cutting tip member 120.
  • the cutting tip member 120 is for operationally impacting with said mining face 700, to thereby dislodge material to be mined from a mining or cutting face 700.
  • the body member 110 comprises engaging formations 112 for securely engaging with the cutting head 500 in a fashion that is suitable for removing material from a cutting face 700.
  • the body member 110 is adapted and configured to securely hold the cutting tip member 120 in position operationally on the rotating cutting head 500 for impaction on the lriining face 700.
  • the body member 110 is composed of an alloy.
  • the alloy comprises at least 60% copper, and 40 % or less nickel.
  • the alloy could be more preferably be comprised of at least 70% Copper and 30% or less of Nickel, even more preferably at least 80% Copper and 20% or less of Nickel, even more preferably at least 90% Copper and 10% or less of Nickel, and even more preferably at least 95% Copper and 5% or less of Nickel
  • the alloy can comprise at least 97% Copper and 3% or less of Nickel.
  • the alloy could also comprise comprises at least 5% or less of one or more selected from
  • the alloy could also comprise comprises at least 10% or less of one or more selected from
  • the alloy could also comprise comprises at least 2% or less of one or more selected from
  • the alloy will be the material sold as Moldstar® 90 by Performance Alloys® at N116W18515 Morse Drive, Germantown, WI53022 (see www.performanceallovs.net).
  • the alloy will be the material sold as Moldstar® 150 by Performance Alloys® at N116W18515 Morse Drive, Germantown, WI 53022 (see www.performancealloys.net).
  • Such commercially found alloys, and Moldstar® 90 in particular are typically comprised of around 91% Copper, 6.7% Nickel, 1.8% Silicon and 0.5 Chrome. It is envisaged that each element can be variable by about 5% due to inconsistencies in production and /or variation in the chemistry measurements. However, such alloys are known for use in moulding operations, and in particular for casting, where their high heat transmissibility are used to greater effect.
  • the material used will have a tensile strength of between 600MPa and 7200MPa, and most preferably between 800MPa and 970 MPa.
  • Such alloys are known for providing compressive strengths of between 600 MPa and 900MPa, and most preferably between 723 MPa and 760MPa.
  • the typical elongation characteristic of such alloys is also between 5-7% elastic deformation.
  • the alloy will preferably have a Brinell hardness rating of between 200-300, and most preferably between 260-280.
  • the body member 110 and/or the cutting tip member 120 may be heat treated to increase its hardness and/or its toughness. Such processing is discussed below.
  • the body member is secured or securable to the cutting tip member 120 by a securing arrangement 130 as will be discussed below.
  • a securing arrangement 130 may be by means of a bonding layer 170 shown in figure 3, preferably in the form of a solder layer or similar, but could also include a resin bonding layer.
  • the body member can be secured or securable to the cutting tip member 120 by means of securing formations 140.
  • the securing formations 140 comprise an engaging member 150 and a fastener 160.
  • the engaging member 150 is configured for engaging with the cutting tip member 120 to hold it in position against the body member 110 to present it in a particular position and/or orientation with respect to the body member 110.
  • the fastener 160 is used to secure the engaging member in position. However, it is also envisaged in alternative embodiments that the fasteners 160 could secure the cutting tip member 120 in position directly, or both the cutting tip member 120 and the engaging member 150.
  • the fastener 160 shown in the embodiments is a bolt with a threaded formation for convenient quick release of the engaging member 150. It is envisaged that other fasteners of could be used, and which could be one or more of a large variety of configurations. Examples of such configurations include bayonet-type fastening formations, threaded fastening formations, or the like.
  • the cutting tip member 120 can be conveniently disengaged from the body member by loosening the fastener to release the engaging member. In this way, it is intended that the cutting tip member 120 can be replaced on site, without having to remove the shearer pick 1000 from the cutting head 500 and sending it to a machine shop for machining. Downtime of the mining apparatus 600 can in this way be reduced, and may allow for increased production.
  • the cutting tip member 120 can comprise its own fastening formations (not shown) by which it can be fastened to the body member 110.
  • the cutting tip member 120 comprises one or more locating formations for locating the cutting tip member 120 in position relative to the body member 110. It is envisaged that such locating formations will prevent movement of the cutting tip member 120 relative to the body member in one or more dimensions.
  • Such locating formations could, for example, comprise angled edges (not shown) for locating in complementary locating formations, such as a similarly shaped recess (not shown) in the body member 110 to prevent relative movement between the cutting tip member 120 and the body member 110 in two dimensions. The cutting tip member 120 would then be prevented from moving out of the recess by the engaging member 150 and fastener 160.
  • the locating formations and the complementary locating formations are substantially wedge shaped.
  • the shearer pick will be manufactured by producing the body member, and then securing the cutting tip member 120 to the body member 110 by means of securing formations or a bonding layer such as solder, resin or any other appropriate bonding layer.
  • the body member 110 can be heat treated to obtain the required material properties in the alloy before or after being securely coupled to the cutting tip member 120, depending on whether the cutting tip member will be affected by the heat treatment processes concerned. In one embodiment, it is envisaged that the body member 110 can be cast around the cutting tip member 120. However, the temperatures envisaged in this process could affect the material properties of the cutting tip member 120 and is not preferred.
  • the body member 110 may be cast from a molten alloy as described above, in that the alloy comprises the percentages by weight of the various constituent elements described above.
  • the body member may be machined or otherwise formed from a cooled alloy stock member as described below.
  • the body member 110 can be coupled to die cutting tip member 120 by a securing arrangement 130 as described above once the cast body member 110 has been manufactured.
  • the cutting tip member 120 may be bonded to the body member (for example by soldering or resin bonding), while in another embodiment, the cutting tip member 120 can be securely coupled to the body member 110 by securing formations 140 as described above, by locating the locating formations and the complementary locating formations with each other to thereby prevent relative movement of the cutting tip member relative to the body member in at least one or more dimensions, engaging the engaging formation with the cutting tip member 120 and fastening the engaging member 150 securely in place by fastening the fastener 160.
  • the elements described above will be mixed and heated to produce a molten alloy.
  • the molten alloy will then be allowed to cool to form an alloy stock member from which the body member can be machined or otherwise formed.
  • several heat treatment processes may take place.
  • the alloy stock member may be and quenched. Quenching could be by oil, air or water quenching.
  • the stock member may be subject to an annealing process if required.
  • Annealing processes for such alloys are typically carried out by reheating it to a temperature in a range between 450 degrees Celsius and 650 degrees Celsius
  • the alloy stock member may be subject to mechanical working before the body member is machined or formed from the alloy stock member.
  • mechanical working are cold working and/ or cold rolling in one or more steps.
  • cold rolling will be above 10% and more preferably at about 20%.
  • the body member 110 will be machined.
  • Alternative forming processes such as stamping or mechanical cutting are also envisaged as possibilities.
  • the step of machining the body member can be via many alternative processes. It is envisaged that water jet cutting can be used, and milling is another alternative. Further, laser cutting is also envisaged, although this is not preferred as the heat may affect the chemical structure of the alloy.
  • the molten alloy preferably in solution at a temperature in the range of between 800 degrees Celsius and 1100 degrees Celsius, may be poured into a cast (not shown) of the body member and allowed to cool, thereby hardening or setting it as a cast body member 110.
  • the body member 120 can be quenched as described above, and preferably in fluid such as water at room temperature.
  • the body member 120 can be reheated to a temperature in a range between 450 degrees Celsius and 650 degrees Celsius.
  • the alloy could comprise at least 5% or less Beryllium. More preferably, it is envisaged that the alloy will comprise between 1.8% and 2% Beryllium.
  • the use of Cu-Be alloy as a shearer pick provides unexpected benefits, as the traditional issues around toxicity of Beryllium can be largely negated by the use of traditionally strong dust extraction systems as found in coal mines (which are used for extracting Methane gas and coal dust already), and strong spray systems that typically serve to wet coal dust at the cutting face to remove most abraded airborne particulate matter that may contain Beryllium.
  • the tensile strength and hardness of the alloy are comparable to steel, while the alloy is non sparking in the sense that when the alloy is used as a shearer pick, if the cutting tip member is dislodged or broken, then the impact of the alloy body member 110 against a mining face such as a coal face will not create an ignition.
  • the safety benefits provided by the use of such an alloy for the body member 110 of a shearer pick 100 in the context of coal mining in particular are also very important in terms of safety. This is because ignitions caused by the impact of shearer pick body members can create explosions and/ or start mine wide fires, causing production delays and possibly deaths.
  • a product according to the invention is anticipated as being extremely commercially valuable, as it satisfies a long felt need in the coal mining industry, and provides a real non-sparking or at least reduced sparking alternative to shearer pricks currently available, while retaining at least most of the important material characteristics of the materials currently used, such as steel.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Organic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Thermal Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Powder Metallurgy (AREA)
  • Drilling And Exploitation, And Mining Machines And Methods (AREA)

Abstract

L'invention concerne un pic de haveuse, et se réfère plus particulièrement, mais pas exclusivement, à un pic de haveuse s'utilisant sur une tête de coupe rotative d'un dispositif d'exploitation du charbon. Le corps du pic de haveuse est constitué d'un alliage comprenant au moins 60% en poids de cuivre, et une valeur inférieure ou égale à 40% en poids de nickel.
PCT/IB2012/054232 2011-08-22 2012-08-22 Pic de haveuse WO2013027177A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU2012298166A AU2012298166A1 (en) 2011-08-22 2012-08-22 Shearer pick

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
NZ594735 2011-08-22
NZ59473511 2011-08-22
NZ597104 2011-12-14
NZ59710411 2011-12-14
NZ59858612 2012-03-06
NZ598586 2012-03-06

Publications (1)

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WO2013027177A1 true WO2013027177A1 (fr) 2013-02-28

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PCT/IB2012/054232 WO2013027177A1 (fr) 2011-08-22 2012-08-22 Pic de haveuse

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AU (1) AU2012298166A1 (fr)
WO (1) WO2013027177A1 (fr)

Cited By (2)

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CN107939393A (zh) * 2017-11-21 2018-04-20 谢荣波 一种矿用机械截齿及其加工工艺
CN113755686A (zh) * 2021-09-15 2021-12-07 广西斯达奔材料科技有限公司 一种截齿齿体热处理工艺

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US4191601A (en) * 1979-02-12 1980-03-04 Ampco-Pittsburgh Corporation Copper-nickel-silicon-chromium alloy having improved electrical conductivity
US5020770A (en) * 1988-05-12 1991-06-04 Moberg Clifford A Combination of mold and alloy core pin
US5235961A (en) * 1991-10-19 1993-08-17 Hydra Tools International Plc Carbide tip and pick
WO2010088480A2 (fr) * 2009-01-29 2010-08-05 Baker Hughes Incorporated Trépan rotatif de forage terrestre à particules-matrice et son procédé de production
AU2010206065B1 (en) * 2010-07-30 2011-10-27 Sandvik Intellectual Property Ab Metal matrix pick

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US3988176A (en) * 1973-08-04 1976-10-26 Hitachi Shipbuilding And Engineering Co., Ltd. Alloy for mold
US4191601A (en) * 1979-02-12 1980-03-04 Ampco-Pittsburgh Corporation Copper-nickel-silicon-chromium alloy having improved electrical conductivity
US5020770A (en) * 1988-05-12 1991-06-04 Moberg Clifford A Combination of mold and alloy core pin
US5235961A (en) * 1991-10-19 1993-08-17 Hydra Tools International Plc Carbide tip and pick
WO2010088480A2 (fr) * 2009-01-29 2010-08-05 Baker Hughes Incorporated Trépan rotatif de forage terrestre à particules-matrice et son procédé de production
AU2010206065B1 (en) * 2010-07-30 2011-10-27 Sandvik Intellectual Property Ab Metal matrix pick

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MOBERG C.: "Twenty years of copper alloys in moldmaking", MOLDMAKING TECHNOLOGY, November 2007 (2007-11-01), pages 24 - 29 *

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107939393A (zh) * 2017-11-21 2018-04-20 谢荣波 一种矿用机械截齿及其加工工艺
CN107939393B (zh) * 2017-11-21 2024-05-17 谢荣波 一种矿用机械截齿及其加工工艺
CN113755686A (zh) * 2021-09-15 2021-12-07 广西斯达奔材料科技有限公司 一种截齿齿体热处理工艺

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