WO2017070342A1 - Pic coupant ayant un indicateur d'usure - Google Patents

Pic coupant ayant un indicateur d'usure Download PDF

Info

Publication number
WO2017070342A1
WO2017070342A1 PCT/US2016/057904 US2016057904W WO2017070342A1 WO 2017070342 A1 WO2017070342 A1 WO 2017070342A1 US 2016057904 W US2016057904 W US 2016057904W WO 2017070342 A1 WO2017070342 A1 WO 2017070342A1
Authority
WO
WIPO (PCT)
Prior art keywords
cutting
indicator
axis
pick
insert
Prior art date
Application number
PCT/US2016/057904
Other languages
English (en)
Inventor
John R. Frederick
Edward L. DOHENY
Original Assignee
Joy Mm Delaware, Inc.
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 Joy Mm Delaware, Inc. filed Critical Joy Mm Delaware, Inc.
Publication of WO2017070342A1 publication Critical patent/WO2017070342A1/fr

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

Definitions

  • the present disclosure relates to mining machines and particularly to a cutting pick for a mining machine.
  • Conventional mining machines include a cutter head having multiple cutting picks for engaging a material to be cut.
  • each cutting pick is supported in a holder block, and the holder block is secured to a rotating drum.
  • the pick may include a cutting portion and a shank, and the shank is received within a sleeve that is in turn secured within the holder block.
  • a cutting pick for a mining machine includes an elongated shank, a cutting portion, an insert, and an indicator.
  • the elongated shank includes a first end and a second end opposite the first end.
  • the cutting portion is connected to the second end of the shank and includes an outer surface and a cutting end.
  • the cutting end includes a slot extending along an axis.
  • the insert includes a tip and an end portion opposite the tip. The end portion is positioned in the slot such that the tip protrudes from the slot.
  • the indicator is positioned on the outer surface of the cutting portion. A position of a portion of the indicator relative to the axis is aligned with a position of the end portion of the insert relative to the axis.
  • a cutting pick assembly for a mining machine includes a holder block and a cutting pick removably coupled to the holder block.
  • the holder block includes a bore.
  • the cutting pick includes an elongated shank, a cutting portion, an insert, and an indicator.
  • the shank includes a first end and a second end opposite the first end.
  • the cutting portion is connected to the second end of the shank and includes an outer surface and a cutting end.
  • the cutting end includes a slot extending along an axis.
  • the insert includes a tip and an end portion opposite the tip. The end portion is positioned in the slot such that the tip protrudes from the slot.
  • the indicator is positioned on the outer surface of the cutting portion. A position of a portion of the indicator relative to the axis is aligned with a position of the end portion of the insert relative to the axis.
  • FIG. 1 is a perspective view of a mining machine including a cutter head.
  • FIG. 2 is a perspective view of a portion of a cutter head including cutting pick assemblies.
  • FIG. 3 is a side section view of a portion of one of the cutting pick assemblies of FIG. 2, viewed along section 3—3.
  • FIG. 4 is an exploded view of a pick.
  • FIG. 5 is an end view of a pick according to another embodiment.
  • FIG. 6 is a partial section view of the pick of FIG. 4. DETAILED DESCRIPTION
  • connection and “coupled” are used broadly and encompass both direct and indirect mounting, connecting and coupling. Further, “connected” and “coupled” are not restricted to physical or mechanical connections or couplings, and can include electrical or hydraulic connections or couplings, whether direct or indirect. Also, electronic communications and notifications may be performed using any known means including direct connections, wireless connections, etc.
  • FIG. 1 illustrates a mining machine, such as a continuous miner 10, including a frame 14 that is supported for movement by tracks 18.
  • the continuous miner 10 further includes a boom 22 and a cutter head 26 supported on the boom 22.
  • the frame 14 also includes a gathering head 30 and an endless conveyor 34 (e.g., a chain conveyor) extending from a first or front end 32 of the frame 14 toward a second or rear end 42 of the frame 14.
  • the gathering head 30 includes a ramp 36 and a pair of rotating arms 38 that engage cut material below the cutter head 26 and direct the cut material onto the conveyor 34.
  • the conveyor 34 transports the cut material along a longitudinal axis of the frame 14, from the area below the cutter head 26 to a transport mechanism (e.g., an auxiliary conveyor, a shuttle car, or another material hauling machine - not shown) positioned proximate the second or rear end 42 of the frame 14.
  • a transport mechanism e.g., an auxiliary conveyor, a shuttle car, or another material hauling machine - not shown
  • the boom 22 includes one end pivotably coupled to the frame 14 and another end supporting the cutter head 26.
  • the boom 22 is pivotable about a pivot axis 54 that is generally transverse to the longitudinal axis of the frame 14.
  • the boom 22 is pivoted by a pair of actuators 58 that are coupled between the frame 14 and the boom 22.
  • the actuators 58 are hydraulic jacks or cylinders.
  • the illustrated cutter head 26 is formed as an elongated drum 62.
  • the drum 62 defines a drum axis 70, and the drum 62 is rotatable about the drum axis 70.
  • the drum axis 70 is generally parallel to the pivot axis 54 of the boom 22.
  • the drum 62 includes an outer circumferential surface, and cutting bit assemblies or cutting pick assemblies 66 are secured to the outer surface of the drum 62.
  • the outer surface of the drum 62 includes multiple pedestals 68, and each cutting pick assembly 66 is affixed to one of the pedestals 68.
  • the cutting pick assemblies 66 may be positioned in various configurations on the outer surface and at various orientations relative to the drum axis 70.
  • each cutting pick assembly 66 includes a holder block 74 and a bit or pick 78.
  • the block 74 includes a bore 82, and a portion of the pick 78 is positioned within the bore 82.
  • a lower surface 84 of each block 74 is secured to one of the pedestals 68.
  • the block 74 further includes a forward or leading surface 86 and a rear or trailing surface 90.
  • the bore 82 extends through the leading surface 86.
  • the block 74 further includes a transverse opening 94 extending laterally between side surfaces of the block 74, and the bore 82 extends between the leading surface 86 and the opening 94.
  • a rear bore extends between the opening 94 and the rear surface 90.
  • the block 74 may support one or more fluid spray nozzles (not shown).
  • the cutting pick assembly 66 further includes a sleeve 98 positioned within the bore 82.
  • the sleeve 98 includes a flange 102, a sleeve shank 104, and a sleeve bore 106.
  • the flange 102 abuts the leading surface 86 of the block 74.
  • the sleeve shank 104 is positioned within the bore 82 of the block 74.
  • the sleeve bore 106 extends through the length of the sleeve 98 and receives the pick 78.
  • the sleeve 98 is positioned between the block 74 and the pick 78; in other embodiments, the cutting pick assembly 66 may not include a sleeve 98 such that the pick 78 is positioned directly in the bore 82 of the block 74. In the latter case, the bore 82 may be sized to mate with the pick 78.
  • the pick 78 includes a first portion or shank 110 and a second portion or cutting portion 114.
  • the shank 110 is formed as an elongated shaft and is positioned within the sleeve bore 106 (FIG. 3), such that the sleeve 98 is positioned between the bore 82 of the block 74 and the shank 110.
  • a first end of the shank 110 extends into the opening 94 of the block 74 (FIG. 3).
  • a clip or pin may be coupled to the first end of the shank 110 (e.g., in a groove 116 - FIG.
  • a second end of the shank 110 is positioned proximate the leading surface 86 of the block 74 (FIG. 3).
  • a pick axis 118 extends along the length of the shank 110, between the first end and the second end.
  • the cutting portion 114 is positioned adjacent the second end of the shank 110 and forms a shoulder 122.
  • the shoulder 122 abuts an end 126 of the sleeve 98; in other embodiments, the shoulder 122 may abut the leading surface 86 of the block 74.
  • an end of the cutting portion 1 14 opposite the shank 1 10 receives a tip or insert 134 in a bore or slot or recess 130 (FIG. 6).
  • the recess 130 extends along a recess axis 136 (FIG. 6).
  • the insert 134 includes a first end portion 138 and a second end portion 142. The first end portion 138 is positioned within the recess 130, and the second end portion 142 forms the working end or tip of the pick 78.
  • the recess axis 136 is collinear with the pick axis 1 18, and the tip of the pick 78 is aligned with the recess axis 136; in other embodiments, the cutting portion may be formed such that the tip is offset or spaced apart from the recess axis and/or a pick axis formed by the shank.
  • the shank 1 10 and cutting portion 1 14 are formed from hardened steel and the insert 134 is formed from tungsten carbide.
  • the cutting portion 1 14 has an outer surface 146.
  • the outer surface 146 has a frustoconical shape.
  • a wear indicator 150 is formed in the cutting portion 1 14 and is visible on the outer surface 146.
  • the indicator 150 is formed as an "O".
  • the indicator 150 may have a different shape (e.g., "A”, "B”, and “C” - FIG. 5), including but not limited to "J", "Y", or another character or number.
  • the indicator 150 may be a logo or brand label.
  • the indicator 150 is positioned at one position on the outer surface 146 of the cutting portion 1 14. In other embodiments, the indicator 150 may extend circumferentially around the cutting portion 1 14. In still other embodiments, as shown in FIG. 5, the indicator 150 may be formed as multiple indicator portions 150a, 150b, 150c, spaced apart about the recess axis 136. The indicator portions may be spaced at regular angular intervals. In some embodiments, the angular interval between each indicator portion may be between approximately 30 degrees and approximately 180 degrees. In some embodiments, the angular interval between each indicator may be between approximately 36 degrees and approximately 120 degrees. In some embodiments, the angular interval between each indicator may be between approximately 40 degrees and approximately 120 degrees. In some
  • the angular interval between each indicator may be between approximately 45 degrees and approximately 120 degrees. In some embodiments, the angular interval between each indicator may be between approximately 60 degrees and approximately 120 degrees. In some embodiments, the angular interval between each indicator may be between approximately 72 degrees and approximately 120 degrees. In some embodiments, the angular interval between each indicator may be between approximately 90 degrees and approximately 120 degrees. In some embodiments, the angular interval between each indicator may be approximately 120 degrees.
  • the indicator 150 is inlayed on the outer surface 146 and extends below the outer surface 146 so that the indicator 150 remains visible even after the outer surface 146 has worn away due to use.
  • the indicator 150 may be formed on the cutting portion 114 during the casting of forging of the pick 78.
  • the indicator 150 may be secured to the cutting portion 114 after initial fabrication of the pick 78.
  • the indicator 150 may be embedded or embossed in the cutting portion 114 in another manner. The indicator 150 may also be raised such that the indicator 150 protrudes from the outer surface 146.
  • the depth of the indicator 150 (when recessed relative to the outer surface 146) or height (when raised) can be varied to provide the best visual wear indication for specific pick types, insert styles, and insert, shapes.
  • the dimensions of the indicator 150 e.g., the height measured parallel to the recess axis 136 and the width measured through an arc extending partially about the recess axis 136 ) can be varied to provide the best visibility characteristics for specific pick and insert styles and shapes.
  • the first end portion 138 of the insert 134 is longitudinally aligned with a portion of the indicator 150, such as the upper edge of the indicator 150.
  • the position of the first end portion 138 with respect to the recess axis 136 coincides with the position of a portion of the indicator 150 (e.g., the upper edge) with respect to the recess axis 136.
  • the indicator 150 is laterally offset from the first end portion 138 of the insert 134. In the illustrated embodiment, the indicator 150 is radially offset from the first end portion 138 relative to the recess axis 136.
  • the inner end of the recess 130 is also aligned with the portion of the indicator 150, and the insert 134 is fully received within the recess 130 such that the first end portion 138 abuts the inner end of the recess 130.
  • the first end portion 138 may be spaced apart from the inner end of the recess 130, but the indicator 150 is still aligned with the first end portion 138.
  • the portion of the insert 134 positioned within the recess 130 is between approximately 0.25 inches and approximately 0.75 inches.
  • the pick 78 must be replaced before the insert 134 is completely worn down in order to avoid damage to the block 74 and/or the sleeve 98, to avoid inefficient cutting, and to reduce the amount of dust that is generated by cutting.
  • the pick 78 may rotate about the pick axis 1 1 8, and the wear on the pick body is typically uniform. However, wear on the outer surfaces of a pick may make it difficult for a user to identify whether any portion of the insert remains or whether the pick should be replaced.
  • the indicator 150 assists with
  • the indicator 150 provides a visual means for estimating the extent of wear on the insert 134 by identifying the location of the bottom of the insert 134. When the mining machine 10 is pulled away from the mine face and the cutter head 26 is visible, the operator may examine the pick assemblies 66 and determine how much of each insert 134 remains for the next cutting operation, if insufficient insert 134 remains for another cutting cycle, the operator can replace any worn picks 78. In addition, the indicator 150 provides a means for branding the pick 78 with text, symbols, logos, etc.
  • the pick 78 is plated or coated in a highly reflective material (e.g., zinc plating) and the indicator 150 is either not coated or coated in a contrasting color (e.g., black).
  • the reflective material will make the indicator 150 more easily visible to the operator, allowing the operator to observe the indicator 150 from a greater distance and while positioned in a safe location.
  • the indicator 1 50 therefore improves pick utilization and reduces cost by maximizing the use of the pick 78 during its working life and avoiding use of the pick 78 beyond its life.
  • the indicator 150 reduces damage that may be caused to sleeves 98 and blocks 74 due to use of picks 78 beyond the working life.
  • the indicator 1 0 also improves cutting efficiency of the machine 10, and reduces the respirable dust exposure for mine personnel. These advantages may reduce maintenance and service time for the machine 10, and therefore increase mining efficiency and productivity.
  • the pick 78 has been described above with respect to a continuous mining machine 10, it is understood that the pick 78 could be incorporated onto various types of cutter heads and/or various types of mining machines including entry development machines and longwall shearers.
  • the indicator 150 may be incorporated into other types of digging attachments or ground-engaging implements, such as a bucket or a dipper for a loader, excavator, or shovel.

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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)

Abstract

La présente invention concerne un pic coupant pour une machine d'exploitation minière, ledit pic coupant comprenant un manche allongé, une partie coupante, une pièce rapportée et un indicateur. Le manche allongé comprend une première extrémité et une seconde extrémité opposée à la première extrémité. La partie coupante est raccordée à la seconde extrémité du manche et comporte une surface externe et une extrémité coupante. L'extrémité coupante comprend une fente s'étendant le long d'un axe. La pièce rapportée comprend une pointe et une partie d'extrémité opposée à la pointe. La partie d'extrémité est positionnée dans la fente de telle sorte que la pointe fasse saillie depuis la fente. L'indicateur est positionné sur la surface externe de la partie coupante. Une position d'une partie de l'indicateur par rapport à l'axe est alignée sur une position de la partie d'extrémité de la pièce rapportée par rapport à l'axe.
PCT/US2016/057904 2015-10-23 2016-10-20 Pic coupant ayant un indicateur d'usure WO2017070342A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201562245905P 2015-10-23 2015-10-23
US62/245,905 2015-10-23

Publications (1)

Publication Number Publication Date
WO2017070342A1 true WO2017070342A1 (fr) 2017-04-27

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PCT/US2016/057904 WO2017070342A1 (fr) 2015-10-23 2016-10-20 Pic coupant ayant un indicateur d'usure

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Cited By (1)

* 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

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090108664A1 (en) * 2007-10-30 2009-04-30 Hall David R Tool Holder Sleeve
US20110089746A1 (en) * 2009-04-10 2011-04-21 Kennametal Inc. Rotatable cutting tool-tool holder-base assembly
WO2013120807A1 (fr) * 2012-02-14 2013-08-22 Element Six Gmbh Outil d'extraction et procédé d'utilisation de cet outil
US20140263787A1 (en) * 2013-03-12 2014-09-18 Joy Mm Delaware, Inc. Tapered pick holder

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20090108664A1 (en) * 2007-10-30 2009-04-30 Hall David R Tool Holder Sleeve
US20110089746A1 (en) * 2009-04-10 2011-04-21 Kennametal Inc. Rotatable cutting tool-tool holder-base assembly
WO2013120807A1 (fr) * 2012-02-14 2013-08-22 Element Six Gmbh Outil d'extraction et procédé d'utilisation de cet outil
US20140263787A1 (en) * 2013-03-12 2014-09-18 Joy Mm Delaware, Inc. Tapered pick holder

Cited By (2)

* 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

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