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WO2024200206A1 - Outil de pic - Google Patents

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Publication number
WO2024200206A1
WO2024200206A1 PCT/EP2024/057604 EP2024057604W WO2024200206A1 WO 2024200206 A1 WO2024200206 A1 WO 2024200206A1 EP 2024057604 W EP2024057604 W EP 2024057604W WO 2024200206 A1 WO2024200206 A1 WO 2024200206A1
Authority
WO
WIPO (PCT)
Prior art keywords
wear protection
pick tool
protection body
shank
throughhole
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.)
Pending
Application number
PCT/EP2024/057604
Other languages
English (en)
Inventor
Markus Wingenfeld
Eric WEINBACH
Michael Ludwig
Bernd Heinrich Ries
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.)
Element Six GmbH
Original Assignee
Element Six GmbH
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 Element Six GmbH filed Critical Element Six GmbH
Publication of WO2024200206A1 publication Critical patent/WO2024200206A1/fr
Anticipated expiration legal-status Critical
Pending legal-status Critical Current

Links

Classifications

    • 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
    • E21C35/1837—Mining picks; Holders therefor with inserts or layers of wear-resisting material characterised by the shape

Definitions

  • This disclosure relates generally to a pick tool for use in mining, milling, and excavation pick assemblies, processing assemblies comprising them, and their use particularly but not exclusively for pavement milling and texturing, or mining.
  • Pick tools are commonly used for breaking, boring into or otherwise degrading hard or abrasive bodies, such as rock, asphalt, coal or concrete and may be used in applications such as road reconditioning, mining, trenching and construction.
  • Pick tools typically comprise a holder body onto which a strike body is attached at one end. The other end of the holder body serves to attach the pick tool to a tool holder, usually by means of a shank.
  • Pick tools can experience extreme wear and failure in several ways due to the environment in which they operate and must be frequently replaced. For example, in road reconditioning operations, a plurality of pick tools may be mounted on a rotatable drum and caused to break up road asphalt as the drum is rotated. A similar approach may be used to break up rock formations such as in coal mining.
  • pick tools typically comprise a thin washer through which the shank of the holder body is inserted.
  • a pick tool comprising a holder body comprising a shank, a strike body attached to an end of the holder body opposing the shank; and a wear protection body comprising an upper surface, a lower surface, and a throughhole extending from the upper surface to the lower surface through which the shank of the holder body is inserted.
  • a ratio of a diameter of the shank adjacent the throughhole of the wear protection body to the thickness of the wear protection body is less than 1 .5.
  • the ratio of the diameter of the shank adjacent the throughhole to the thickness of the wear protection body is from about 1.0 to about 1.45.
  • the wear protection body has a Rockwell C hardness of 40-60, for example, a Rockwell C hardness of 40-55.
  • the wear protection body is at least partly formed of steel.
  • the diameter of the shank adjacent the throughhole of the wear protection body is from about 10 mm to about 25 mm, preferably from about 18 mm to about 22 mm.
  • the thickness of the wear protection body is from about 10 mm to about 40 mm, preferably from about 14 mm to about 22 mm.
  • the throughhole of the wear protection body is circular.
  • the wear protection body comprises a cut-out portion adjacent to the throughhole and/or at the periphery.
  • the cut-out portion is a bevel.
  • the largest linear dimension of the upper surface of the wear protection body and the largest linear dimension of the lower surface of the wear protection body are different.
  • the wear protection body comprises a chamfer, curved surface or stepped surface between the upper and lower surfaces.
  • the wear protection body further comprises one or more annular sloped surfaces inclined towards or away from the throughhole.
  • the holder body further comprises a head portion from which the shank depends, wherein the strike body is attached to an end of the head portion and the shank depends from an opposing end of the head portion.
  • the upper surface of the wear protection body abuts or is adjacent to an under-side of the head portion of the holder body.
  • the upper surface of the wear protection body comprises an annular depression or an annular protrusion
  • the under-side of the head portion of the holder body comprises a corresponding annular protrusion or annual depression.
  • the shape of the under-side of the head portion of the holder body corresponds to the shape of the upper surface of the wear protection body.
  • the wear protection body comprises an annular disc.
  • the wear protection comprises a polygonal disc.
  • the polygonal disc may be triangular, quadrilateral, pentagonal, hexagonal, heptagonal, octagonal, nonagonal, decagonal, hendecagonal, or dodecagonal in profile.
  • the wear protection body comprises an upper portion which comprises a sloped surface, a central portion which comprises the disc, and a lower portion which comprises a sloped surface.
  • the sloped surface of the lower portion is inclined towards the central portion.
  • the upper portion of the wear protection body comprises the upper surface which abuts or is adjacent to an under-side of the head portion of the holder body, and/or the sloped surface of the upper portion is inclined towards the upper surface.
  • the ratio of the diameter of the central portion to the maximum diameter of the lower portion is in the range of about 3 to 1 .
  • the strike body comprises polycrystalline diamond (PCD) material, grains of synthetic or natural diamond dispersed in a matrix comprising carbide material, or a cemented carbide.
  • PCD polycrystalline diamond
  • the strike body comprises a strike tip formed of a superhard material.
  • a processing assembly comprising a plurality of pick tools as described herein attached to a drive mechanism or carrier body.
  • Figure 1 shows an underside of a typical road-milling machine, incorporating prior art pick tools
  • Figure 2 shows a front perspective view of a prior art pick tool with partial crosssection of the interface between the impact tip and the support body;
  • Figure 3 shows a front perspective view of a pick tool in one embodiment of the invention
  • Figure 4 shows a perspective view of the wear protection body of the pick tool depicted in Figure 3
  • Figures 5 and 6 show a cross-sectional view of the wear protection body of the pick tool depicted in Figure 3;
  • Figure 7 shows a front perspective view of a pick tool in accordance with another embodiment of the invention.
  • Figure 8 shows a cross-sectional view of the pick tool depicted in Figure 7;
  • Figure 9 shows a perspective view of the wear protection body of the pick tool depicted in Figures 7 and 8;
  • Figure 10 shows a schematic cross-sectional view of the interface between the head portion of the holder body and the upper surface of the wear protection body.
  • FIG. 1 shows an underside of a typical road-milling machine 10.
  • the milling machine 10 may be an asphalt or pavement planer used to degrade formations such as pavement 12 prior to placement of a new layer of pavement.
  • a plurality of pick tools 14 are attached to a rotatable drum 16.
  • the drum 16 brings the pick tools 14 into engagement with the formation 12.
  • a base holder 18 is securely attached to the drum 16 and, by virtue of an intermediate tool holder (not shown), may hold the pick tool 14 at an angle offset from the direction of rotation such that the pick tool 14 engages the formation 12 at a preferential angle.
  • a shank (not shown) of the pick tool 14 is rotatably disposed within the tool holder, though this is not necessary for pick tools 14 comprising super-hard impact tips.
  • FIG. 2 shows a prior art pick tool 14.
  • the pick tool 14 comprises a generally bellshaped strike body 20 and a steel holder body 22, which comprises a head portion 24.
  • the holder body 22 comprises a shank 26 extending centrally from the head portion 24.
  • the strike body 20 sits within a circular recess 27 provided in one end of the holder body 22. This means that an edge of the holder body 22 always surrounds the metal carbide strike body 20.
  • Braze material typically provided as a thin circular disc, positioned within the circular recess 27 securely joins the strike body 20 to the holder body 22.
  • the pick tool 14 is attachable to a drive mechanism, for example, of a road-milling machine, by virtue of the shank 26 and a spring sleeve 28 surrounding the shank 26 in a known manner.
  • the spring sleeve 28 enables relative rotation between the pick tool 14 and the tool holder.
  • Pick tool 14 also comprises a wear protection body 30 in the form of an annular disc, sometimes known as a washer.
  • the annular wear protection disc comprises a throughhole 32 through which the shank 26 of the holder body 22 is inserted.
  • Such wear protection discs serve a dual purpose: firstly, they assist in securing the spring sleeve to enable attachment of the pick tool to the above-mentioned drive mechanism; and secondly, they protect the holder body from wear during use of the tool by providing a physical barrier between the tool holder and the holder body, thus extending the useful life of the pick tool.
  • the wear protection discs of the prior art are relatively thin. This is partly because it has previously been considered undesirable to add too much weight to the pick tool by having a thicker washer.
  • the present inventors have found that greater wear protection can be obtained without detriment to other properties of the tool by increasing the thickness of the wear protection body such that the ratio of a diameter of the shank adjacent the throughhole of the wear protection body to the thickness of the wear protection body is less than 1.5.
  • the wear protection body can be made of such a thickness that it is even possible to omit the head portion of the holder body without detriment to the tool life, thus simplifying manufacture of the tool. It can be considered that this effectively allows the wear protection body to fulfil three purposes: the two listed above, and the function of the head portion of the holder body.
  • FIG 3 shows a perspective view of a pick tool 114 according to an embodiment of the invention.
  • the pick tool 114 comprises a strike body 20 sitting within a circular recess 27 provided in one end of the holder body 22.
  • a shank 26 extends from the head portion of the holder body.
  • a spring sleeve 28 surrounds the shank 26.
  • the shank 26 is inserted through a throughhole 32 in a wear protection body 30.
  • Figure 4 shows a perspective view of the wear protection body 30 of this embodiment, showing the throughhole 32.
  • the throughhole 32 extends from the upper surface of the wear protection body 30 to the lower surface of the wear protection body 30.
  • FIG. 5 A schematic representation of the wear protection body 30 of this embodiment with the shank 26 inserted through is shown in Figures 5 and 6.
  • the thickness T1 of the wear protection body 30 is measured along the longitudinal axis L.
  • the diameter D of the shank 26 adjacent the throughhole 32 is measured along a transverse plane substantially perpendicular to the longitudinal axis L and in substantially planar alignment with the throughhole 32.
  • the ratio of the diameter D of the shank 26 adjacent the throughhole 32 to the thickness of the wear protection body 30 is less than about 1 .5, for example less than about 1.45, for example less than about 1.4, for example less than about 1.3, for example less than about 1 .2, for example less than about 1 .1 , for example less than about 1.0, for example less than about 0.9, for example less than about 0.8, for example less than about 0.7, for example less than about 0.6, for example less than about 0.5, for example less than about 0.4, for example less than about 0.3, for example less than about 0.2, for example less than about 0.1.
  • the diameter D of the shank 26 adjacent the throughhole 32 may be at least 10 mm, for example at least 15 mm, for example at least 20 mm, for example at least 25 mm.
  • the diameter D of the shank 26 adjacent the throughhole 32 may be less than or about equal to 25 mm, less than or about equal to 20 mm, or less than or about equal to 15 mm.
  • the diameter D of the shank 26 adjacent the throughhole 32 may be from about 15 mm to about 25 mm, for example from about 18 mm to about 22 mm.
  • the thickness T1 of the wear protection body 30 may be from about 7 mm to about 50 mm, for example from about 10 mm to about 40 mm, for example from about 15 mm to about 30 mm, for example from about 20 mm to about 25 mm.
  • the thickness T1 of the wear protection body 30 may be from about 14 mm to about 20 mm, from about 12.5 mm to about 22 mm, or from about 14 mm to about 22 mm.
  • the thickness T1 of the wear protection body 30 is 16.5 mm and the diameter of the shank 26 adjacent the throughhole 32 is 19.8 mm.
  • the ratio of the diameter of the shank 14 adjacent the throughhole 32 to the thickness T 1 of the wear protection body is therefore 1.2. This is significantly lower than in prior art embodiments which make use of a thinner wear protection body.
  • the wear protection body 30 shown in Figures 3-6 (best shown in Figure 6) comprises an upper portion 34, a central portion 36 and a lower portion 38.
  • the upper portion 34 of the wear protection body 30 comprises an upper surface 34a which is configured to abut the under-side of the head portion 24 of the holder body 22.
  • the upper portion 34 comprises a peripheral cut-out portion in the form of an annular sloped surface, i.e. a chamfer, which is inclined towards the upper surface 34a.
  • the annular sloped surface may be disposed at an angle 9 to the longitudinal axis L.
  • the angle 9 may be in the range 30 degrees to 60 degrees, for example about 30, 35, 40 or 45 degrees.
  • the annular sloped surface, i.e. the chamfer is disposed at an angle of 45 degrees to the longitudinal axis L.
  • the upper portion 34 further comprises a cut-out portion, in this case a bevel, adjacent to the throughhole and which is inclined from the throughhole 32 to the upper surface 34a of the upper portion 34.
  • the upper surface 34a of the upper portion 34 is substantially planar with respect to a transverse plane substantially perpendicular to the longitudinal axis L.
  • the central portion 36 of the wear protection body 30 comprises a substantially planar peripheral surface which is substantially aligned with the longitudinal axis L.
  • the diameter D c of the central portion 36 of the wear protection body 30 is measured along a tranverse plane perpendicular to the longitudinal axis L, and may be from 25 to 75 mm, for example from 35 to 65 mm, for example from 45 to 55 mm.
  • the diameter D c of the central portion 34 of the wear protection body 30 is 45 mm.
  • the lower portion 38 of the wear protection body 30 comprises a peripheral cut-out portion in the form of an annular sloped surface, i.e. a chamfer.
  • the annular sloped surface of the lower portion 38 is inclined towards the central portion 36.
  • the annular sloped surface may be disposed at an angle 9 to the longitudinal axis L.
  • the angle 9 may be in the range 30 degrees to 60 degrees, for example about 45 degrees.
  • the annular sloped surface, i.e. the chamfer is disposed at an angle of 45 degrees to the longitudinal axis L.
  • the ratio of the diameter D c of the central portion to the maximum diameter D L of the lower portion, as measured along a transverse plane perpendicular to the longitudinal axis L, may be in the range of about 3 to 1 , for example about 2. In this example, the ratio of the diameter D c of the central portion to the maximum diameter D L of the lower portion is 1.77.
  • the maximum diameter D L of the lower portion as measured along a transverse plane perpendicular to the longitudinal axis L, as depicted in Figure 6, may be from 10 mm to 75 mm, for example from 20 mm to 65 mm, for example from 25 to 55 mm, for example from 35 mm to 45 mm.
  • the maximum diameter DL of the lower portion 38 as measured along a transverse plane perpendicular to the longitudinal axis L may be from about 20 mm to about 30 mm, for example from about 22 mm to about 30 mm, for example from about 22 mm to about 27 mm.
  • the thickness T1 of the wear protection body 30 is equal to the thickness Tu of the upper portion 34, the thickness T c of the central portion 36 and the thickness T L of the lower portion 38 of the wear protection body 30.
  • the thickness Tu of the upper portion 34 may be from about 3 mm to about 9 mm, for example from about 4 mm to about 8 mm, for example from about 5 mm to about 7 mm.
  • the thickness T c of the central portion 36 may be from about 5 mm to about 10 mm, for example from about 6 mm to about 9 mm, for example from about 7 mm to about 8 mm.
  • the combined thickness (Tu + T c ) of the upper portion 34 and the central portion 36 may be from 12 to 18 mm, for example from 14 mm to 16 mm.
  • the thickness TL of the lower portion 38 may be from 1 mm to 4 mm, for example from 2 mm to 3 mm, for example about 2.5 mm.
  • the combined thickness (Tu + T c ) of the upper portion 34 and the central portion 36 is 14 mm
  • the thickness (T L ) of the lower portion 38 is 2.4 mm.
  • Figure 7 shows a perspective view of a pick tool 214 according to another embodiment of the invention
  • Figure 8 shows a cross-sectional view of the pick tool depicted in Figure 7.
  • the pick tool 214 comprises a strike body 20 sitting within a circular recess 27 provided in one end of the holder body 22.
  • a shank 26 extends from the holder body 22.
  • a spring sleeve 28 surrounds the shank 26.
  • the shank 26 is inserted through a throughhole 32 in a wear protection body 30.
  • Figure 9 shows a perspective view of the wear protection body 30 of this embodiment, showing the throughhole 32.
  • the thickness T1 of the washer is measured as for the first embodiment, as is the diameter D of the shank 26 adjacent the throughhole 32.
  • the ratio of the diameter D of the shank 26 adjacent the throughhole 32 to the thickness of the wear protection body 30 may be as described above in the context of the first embodiment.
  • the diameter D of the shank 26 adjacent the throughhole 32 may be as described above in the context of the first embodiment.
  • the thickness T1 of the wear protection body 30 may be as described above in the context of the first embodiment.
  • the thickness T1 of the wear protection body 30 is 45 mm and the diameter of the shank 26 adjacent the throughhole 32 is 19.8 mm.
  • the ratio of the diameter of the shank 14 adjacent the throughhole 32 to the thickness T1 of the wear protection body is therefore 0.44. This is far lower than in prior art embodiments which make use of a thinner wear protection body.
  • the wear protection body is sufficiently thick that a head portion of the holder body is not required, thereby simplifying the component manufacturing process.
  • the wear protection body 30 shown in Figures 7-9 (best shown in Figure 8) comprises an upper portion 34, a central portion 36 and a lower portion 38 as described in the context of the first embodiment.
  • the upper portion 34 does not further comprise a cut-out portion in the form of a bevel inclined from the throughhole 32 to the upper surface 34a of the upper portion 34, though this may be included if desired. Except where indicated differently, the dimensions of the central portion 36 and the lower portion 38 are as described in the context of the first embodiment. A significant difference is the thickness Tu of the upper portion 34, which in this embodiment may be from about 7 mm to about 30 mm, for example from about 10 mm to about 25 mm, for example from about 15 mm to about 20 mm.
  • the combined thickness (Tu + T c ) of the upper portion 34 and the central portion 36 may be from about 12 mm to about 40 mm, for example from about 16 mm to about 34 mm, for example from about 22 mm to about 30 mm.
  • the combined thickness (Tu + T c ) of the upper portion 34 and the central portion 36 is 42.6 mm
  • the thickness (T L ) of the lower portion 38 is 2.4 mm.
  • a modified version of the wear protection disc disclosed in US 2021/0095564 A1 is used as the wear protection body 30 in either of the first or second embodiments described herein.
  • the wear protection disc is as described in US 2021/0095564 A1 , in particular as shown in Figures 5 and 6 and accompanying description paragraphs [0030]-[0033], except that the diameter of the pick shank adjacent the cut-out (i.e. the throughhole 32) and/or the disc thickness are adjusted such that the ratio of the diameter of the pick shank adjacent the cut-out (i.e. throughhole 32) to the disc thickness is less than 1 .5.
  • Figure 10 depicts schematically various configurations for the interface between the under-side of the head portion 24 of the holder body 22 and the upper surface of the wear protection body 30.
  • the under-side of the head portion 24 of the holder body 30 and the upper surface of the wear protection body 30 are both substantially planar in profile.
  • the under-side of the head portion 24 of the holder body 22 comprises a cut-out portion at the periphery with a sloping surface which is inclined away from the circumferential surface of the holder body 22, and the upper surface of the wear protection body 30 comprises a corresponding peripheral sloping surface.
  • the under-side of the head portion 24 of the holder body 22 comprises a cut-out portion at the periphery with a sloping surface which is inclined towards the circumferential surface of the holder body 22, and the upper surface of the wear protection body 30 comprises a corresponding peripheral sloping surface.
  • the under-side of the head portion 24 of the holder body 22 comprises an annular protrusion and the upper surface of the wear protection body 30 comprises a corresponding annular depression.
  • the under-side of the head portion 24 of the holder body 22 comprises an annular depression and the upper surface of the wear protection body 30 comprises a corresponding annular protrusion.
  • the under-side of the head portion 24 of the holder body 22 comprises a cut-out portion with a stepped profile on the surface opposing the circumferential surface of the holder body 22, i.e. adjacent to the throughhole, and the upper surface of the wear protection body 30 comprises a corresponding cut-out portion.
  • the under-side of the head portion 24 of the holder body 22 comprises a cut-out portion at the periphery with a stepped profile
  • the upper surface of the wear protection body 30 comprises a corresponding peripheral cut-out portion
  • the strike body may comprise a strike tip, and the strike body and/or the strike tip may comprise or consist of grains of super-hard material such as synthetic or natural diamond, a substantial number of which are directly inter-grown (directly inter-bonded) with each other and comprise interstitial regions between the diamond grains that include non-diamond material such as cobalt, or at least some of the interstitial regions may include voids devoid of solid state material.
  • the strike body may comprise a strike tip comprising or consisting of polycrystalline diamond (PCD) material or other super-hard material bonded to a cemented carbide substrate.
  • PCD polycrystalline diamond
  • the strike body may comprise or consist of composite material comprising diamond and or cubic boron nitride (cBN) grains dispersed within a matrix, which may comprise or consist of cemented carbide material, alloy material, super-alloy material (such as Ni-based super-alloy material), ceramic material, cermet material, intermetallic phase material.
  • cBN cubic boron nitride
  • the strike body and/or the strike tip may comprise or consist of polycrystalline cBN (PCBN) material, and or silicon carbide bonded diamond (SCD) composite material.
  • the strike body may comprise or consist of a cemented carbide, for example cemented tungsten carbide.
  • the strike body may comprise a strike tip joined to a support body.
  • the strike tip may be joined to the support body by means of a join layer comprising braze alloy material
  • the holder body may comprise a head bore for accommodating and holding the strike body, configured such that when the strike body is inserted into the head bore as for use, the join layer is contained within the head bore.
  • the shank may be coaxial with the support body and or the strike body when the strike body is attached to the holder body as for use.
  • ‘super-hard material’ has a Vickers hardness (HV) of at least about 28 gigapascals (GPa).
  • HV Vickers hardness
  • Synthetic and natural diamond, polycrystalline diamond (PCD), cubic boron nitride (cBN) and polycrystalline cBN (PCBN) material are examples of super-hard materials.
  • synthetic diamond which is also called man-made diamond, is diamond material that has been manufactured.
  • polycrystalline diamond (PCD) material comprises an aggregation of a plurality of diamond grains, a substantial portion of which are directly inter-bonded with each other and in which the content of diamond is at least about 80 volume per cent of the PCD material.
  • Interstices between the diamond grains may be at least partly filled with a filler material that may comprise catalyst material for synthetic diamond, or they may be substantially empty.
  • a catalyst material (which may also be referred to a solvent I catalyst material) for synthetic diamond is capable of promoting the growth of synthetic diamond grains and or the direct intergrowth of synthetic or natural diamond grains at a temperature and pressure at which synthetic or natural diamond is thermodynamically stable.
  • catalyst materials for diamond are Fe, Ni, Co and Mn, and certain alloys including these.
  • Bodies comprising PCD material may comprise at least a region from which catalyst material has been removed from the interstices, leaving interstitial voids between the diamond grains.
  • PCBN material comprises grains of cubic boron nitride (cBN) dispersed within a matrix, which may comprise metal, alloys, intermetallic materials, Ni-based super-alloy material or ceramic material, for example.
  • super-hard materials include certain composite materials comprising diamond or cBN grains held together by a matrix comprising ceramic material, such as silicon carbide (SiC), or cemented carbide material, such as Cobonded WC material (for example, as described in United States patents numbers 5,453,105 or 6,919,040).
  • SiC-bonded diamond materials may comprise at least about 30 volume per cent diamond grains dispersed in a SiC matrix (which may contain a minor amount of Si in a form other than SiC). Examples of SiC-bonded diamond materials are described in United States patents numbers 7,008,672; 6,709,747; 6,179,886; 6,447,852; and International Application publication number W02009/013713).

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Drilling And Exploitation, And Mining Machines And Methods (AREA)
  • Road Repair (AREA)

Abstract

La présente divulgation concerne un outil de pic comprenant un corps de support comprenant une tige ; un corps de gâche fixé à une extrémité du corps de support opposée à la tige ; et un corps de protection contre l'usure comprenant : une surface supérieure ; une surface inférieure ; et un trou traversant s'étendant de la surface supérieure à la surface inférieure à travers lequel la tige du corps de support est insérée ; un rapport d'un diamètre de la tige adjacent au trou traversant du corps de protection contre l'usure à l'épaisseur du corps de protection contre l'usure étant inférieur à 1,5. L'invention porte également sur un ensemble de traitement comprenant une pluralité desdits outils de pic et une utilisation de l'ensemble de traitement dans l'exploitation minière ou le forage dans la terre ou le traitement de la chaussée.
PCT/EP2024/057604 2023-03-24 2024-03-21 Outil de pic Pending WO2024200206A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB2304302.9A GB2628412B (en) 2023-03-24 2023-03-24 Pick tool
GB2304302.9 2023-03-24

Publications (1)

Publication Number Publication Date
WO2024200206A1 true WO2024200206A1 (fr) 2024-10-03

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PCT/EP2024/057604 Pending WO2024200206A1 (fr) 2023-03-24 2024-03-21 Outil de pic

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GB (1) GB2628412B (fr)
WO (1) WO2024200206A1 (fr)

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US6919040B2 (en) 2000-08-08 2005-07-19 Robert Fries Method of producing an abrasive product containing cubic boron nitride
WO2009013713A2 (fr) 2007-07-23 2009-01-29 Element Six (Production) (Pty) Ltd Abrasif
US20170234128A1 (en) * 2014-08-20 2017-08-17 Element Six Gmbh Pick assembly, processing assembly comprising it, method of making it and method of using it
US20170254201A1 (en) * 2014-10-17 2017-09-07 Vermeer Manufacturing Company Protective wear sleeve for cutting element
US20210095564A1 (en) 2018-04-17 2021-04-01 Betek Gmbh & Co. Kg Milling pick
US20210115792A1 (en) * 2018-04-17 2021-04-22 Betek Gmbh & Co. Kg Milling pick

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US7475948B2 (en) * 2006-08-11 2009-01-13 Hall David R Pick with a bearing

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US5453105A (en) 1992-08-05 1995-09-26 Middlemiss; Stewart N. Abrasive product
US6179886B1 (en) 1997-09-05 2001-01-30 Ambler Technologies, Inc. Method for producing abrasive grains and the composite abrasive grains produced by same
US6709747B1 (en) 1998-09-28 2004-03-23 Skeleton Technologies Ag Method of manufacturing a diamond composite and a composite produced by same
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