WO2017010975A1 - Configuration de trépan destinée à une tête de coupe - Google Patents

Configuration de trépan destinée à une tête de coupe Download PDF

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Publication number
WO2017010975A1
WO2017010975A1 PCT/US2015/039964 US2015039964W WO2017010975A1 WO 2017010975 A1 WO2017010975 A1 WO 2017010975A1 US 2015039964 W US2015039964 W US 2015039964W WO 2017010975 A1 WO2017010975 A1 WO 2017010975A1
Authority
WO
WIPO (PCT)
Prior art keywords
bit
drum
tip
axis
bits
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.)
Ceased
Application number
PCT/US2015/039964
Other languages
English (en)
Inventor
Bulent TIRYAKI
David Bayne
David Meade
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.)
Joy MM Delaware Inc
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
Priority to AU2015402506A priority Critical patent/AU2015402506B2/en
Priority to PCT/US2015/039964 priority patent/WO2017010975A1/fr
Priority to CA2991742A priority patent/CA2991742C/fr
Publication of WO2017010975A1 publication Critical patent/WO2017010975A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C27/00—Machines which completely free the mineral from the seam
    • E21C27/20—Mineral freed by means not involving slitting
    • E21C27/24—Mineral freed by means not involving slitting by milling means acting on the full working face, i.e. the rotary axis of the tool carrier being substantially parallel to the working face
    • 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 invention relates to mining machines. Specifically, the present invention relates to a configuration of cutting bit assemblies located on a mining machine.
  • each cutting bit assembly includes a bit coupled to a holder block, and the holder block is affixed to a rotating drum.
  • the bit may be received within a sleeve that is in turn secured within the holder block.
  • the cutting bit assemblies are positioned and oriented on the cutter head to increase the performance or efficiency of the continuous mining machine as it cuts material from the mine face.
  • a cutter head for a mining machine includes a drum having a first end and a second end and defining a drum axis extending between the first end and the second end.
  • the drum is rotatable about the drum axis, and a drum plane extends perpendicular to the drum axis.
  • the cutter head includes a plurality of cutting bit assemblies secured to an outer surface of the drum proximate the first end of the drum.
  • Each cutting bit assembly includes a block and a bit.
  • the block has a bore, and the bit is positioned at least partially in the bore of the block and includes a tip configured to engage a mine surface.
  • the bit defines a bit axis, and the bit axis defines a first lean angle relative to the drum plane.
  • the plurality of cutting bit assemblies includes a first series having four first bits.
  • Each of the first bits includes a first tip and defines a first bit axis oriented at a first lean angle relative to the drum plane.
  • the first lean angle is between about 60 degrees and about 75 degrees.
  • a cutter head for a mining machine includes a drum having a first end and a second end and defining a drum axis extending between the first end and the second end.
  • the drum is rotatable about the drum axis with a drum plane extending perpendicular to the drum axis.
  • the cutter head includes a first bit coupled to the drum having a first tip and defining a first bit axis.
  • the first bit axis is oriented at a first lean angle relative to a drum plane.
  • the cutter head includes a second bit coupled to the drum having a second tip and defining a second bit axis.
  • the second bit axis is oriented at a second lean angle relative to the drum plane.
  • the cutter head includes a third bit coupled to the drum having a third tip and defining a third bit axis.
  • the third bit axis is oriented at a third lean angle relative to the drum plane.
  • the cutter head includes a fourth bit coupled to the drum having a fourth tip and defining a fourth bit axis.
  • the fourth bit axis is oriented at a fourth lean angle relative to the drum plane.
  • the cutter head includes a fifth bit coupled to the drum having a fifth tip and defining a fifth bit axis.
  • the fifth bit axis is oriented at the first lean angle relative to the drum plane.
  • the first lean angle is greater than the second lean angle
  • the second lean angle is greater than the third lean angle
  • the third lean angle is greater than the fourth lean angle.
  • FIG. 1 is a perspective view of a mining machine including a cutter head.
  • FIG. 2 is a perspective view of a portion of the cutter head of FIG. 1.
  • FIG. 3 is a cross sectional view of a portion of the cutter head of FIG. 2 viewed along section 3—3.
  • FIG. 4 is a rear view of the cutter head of FIG. 2 including a plurality of cutting bit assemblies.
  • FIG. 5 illustrates a projection of the cutter head of FIG. 2 illustrating a configuration of the plurality of cutting bit assemblies.
  • FIG. 1 illustrates a mining machine, such as a continuous miner 10, including a frame 14 that is supported for movement, for example by tracks 18.
  • the continuous miner 10 further includes a boom 22 and a cutter head 26 supported on the boom 22.
  • a mining machine such as a continuous miner 10
  • the frame 14 also includes a gathering head 30 and a conveyor 34 extending from a first or front end of the frame 14 toward a second or rear end of the frame 14. After material is cut from a mine face by the cutter head 26, the material may fall to the mine floor.
  • the gathering head 30 includes a pair of rotating arms 38 that engage the 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 (not shown) of the frame 14, from the gathering head 30 to a second conveyor (not shown) positioned proximate the second or rear end of the frame 14.
  • 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 cutter head 26 includes an elongated drum 62 and cutting bit assemblies 66 secured to an outer surface of the drum 62.
  • the drum 62 defines a drum axis 70 that is generally parallel to the pivot axis 54 of the boom 22, and the drum 62 is rotatable about the drum axis 70.
  • the cutter head 26 includes end portions 60 and an intermediate portion 56 positioned between the end portions 60. A proximal end 61 of the end portions 60 is adjacent the intermediate portion 56, whereas a distal end 63 of the end portions 60 is located opposite (e.g., axially spaced apart from) the proximal end 61.
  • the cutter head 26 may include fewer or more than three portions.
  • FIG. 2 illustrates one of the end portions 60.
  • an outer surface of each end portion 60 is stepped such that the proximal end 61 has a larger diameter than the distal end 63.
  • the outer surface of the drum 62 includes pedestals 68, and each pedestal 68 defines a surface 64.
  • Each cutting bit assembly 66 includes a pick or bit 74, a sleeve 78, and a holder block 82, and each holder block 82 is affixed to a surface 64 of a corresponding pedestal 68.
  • the sleeve 78 provides a protective interface between the bit 74 and the holder block 82.
  • the cutting bit assembly 66 may not include the sleeve.
  • each bit 74 includes a first portion 86 having a tip 88 for engaging a mine face to remove material, and a second portion or shank 90.
  • the shank 90 of each bit 74 is positioned within a bore of the sleeve 78, which is in turn positioned in a bore of the holder block 82.
  • the shank 90 defines a bit axis 92.
  • the bit axis 92 passes through the tip 88 and the bit axis 92 may be concentrically aligned with the bores of the sleeve 78 and the holder block 82.
  • the end of the shank 90 is secured relative to the sleeve 78 by a clip, and the bit 74 is selectively removable from the holder block 82 and may be replaced by a new bit 74.
  • the tip 88 of the illustrated cutting bit assembly 66 is spaced from the drum axis 70 by a radial distance.
  • a first plane 94 e.g., tangent plane
  • the first plane 94 intersects the tip 88, and the first plane 94 is perpendicular to a radial line extending from the drum axis 70 to the tip 88.
  • the first plane 94 is parallel to the drum axis 70.
  • Each cutting bit assembly 66 includes an attack angle ⁇ defined between the bit axis 92 of the bit shank 90 and the first plane 94.
  • the illustrated cutting bit assemblies 66 located adjacent the distal end 63 of the end portion 60 define an end ring bit assembly 98.
  • the end ring bit assembly 98 includes bits 74a, 74b, 74c, 74d having corresponding tips 88a, 88b, 88c, 88d to engage the mine surface axially beyond the distal end 63 (e.g., positioned to the side of the cutter head 26).
  • the remaining surface of the end portion 60 includes bits 74e including tips 88e for engaging the mine surface in front of the cutter head 26.
  • a second plane 102 extends perpendicular to the drum axis 70.
  • a lean angle ⁇ extends between the second plane 102 and the bit axis 92 of each cutting bit assembly 66.
  • a positive lean angle is defined as an angle extending outwardly or away from the distal end 63 of the end portion, and away from the second plane 102.
  • a negative lean angle is defined as an angle extending outwardly from the distal end 63 and toward the proximal end 61.
  • the lean angle is zero degrees.
  • some of the cutting bit assemblies 66 include a bit axis 92 oriented at a lean angle of zero degrees.
  • Other cutting bit assemblies include bits 74a, 74b, 74c, 74d oriented at various lean angles ⁇ .
  • the surface 64 of a respective pedestal 68 is oriented at a desired lean angle relative to the drum axis 70 such that the cutting bit assembly 66 coupled to the surface 64 has the desired lean angle ⁇
  • At least one cutting bit assembly 66 may be supported at a lean angle relative to the second plane 102. If the lean angle ⁇ is non-zero, the bit axis 92 may be projected onto the second plane 102. An angle between the projected bit axis and the first plane 94 defines an effective attack angle. In one embodiment, the effective attack angle ⁇ is between about 45 degrees and about 55 degrees. In one embodiment, the effective attack angle is 50 degrees. In other embodiments, the effective attack angle may be differently configured dependent upon other parameters (e.g., geometry of the bit, type of material to be cut, depth of cut of the cutter head, etc.). In addition, in some embodiments the effective attack angle for all of the cutting bit assemblies 66 (bits 74a-74e) is the same.
  • the bit 74a includes a first lean angle ⁇ ⁇ that is defined between the second plane 102 and the bit axis 92a
  • the bit 74b includes a second lean angle ⁇ b that is defined between the second plane 102 and the bit axis 92b
  • the bit 74c includes a third lean angle ⁇ 0 that is defined between the second plane 102 and the bit axis 92c
  • the bit 74d includes a fourth lean angle P d that is defined between the second plane 102 and the bit axis 92d.
  • the first lean angle ⁇ ⁇ is between about 60 degrees and about 75 degrees.
  • the second lean angle Pb is between about 30 degrees and about 45 degrees. In one embodiment, the third lean angle ⁇ 0 is between about 15 degrees and about 25 degrees. In one embodiment, the fourth lean angle Pd is between about 0 degrees and about 10 degrees. In one embodiment, the first lean angle ⁇ ⁇ is between about 60 degrees and about 65 degrees. In one embodiment, the second lean angle Pb is between about 30 degrees and about 35 degrees. In one embodiment, the third lean angle ⁇ 0 is between about 15 degrees and about 20 degrees. In one embodiment, the fourth lean angle Pd is between about 0 degrees and about 5 degrees.
  • a fifth lean angle ⁇ ⁇ of the bits 74e may be between about 0 degrees and 10 degrees.
  • the first lean angle ⁇ ⁇ is about 60 degrees.
  • the second lean angle Pb is about 30 degrees.
  • the third lean angle ⁇ 0 is about 20 degrees.
  • the fourth lean angle Pd is about 0 degrees.
  • the fifth lean angle ⁇ ⁇ is about 0 degrees.
  • FIG. 5 illustrates the tip 88 of the bit 74 for each cutting assembly 66 of the drum end portion 60 projected onto a flat or planar representation.
  • Each tip 88 is represented as a circle.
  • Each vertical line in the projection represents a cutting line aligned with at least one tip 88 and extending circumferentially around the surface of the end portion 60.
  • Each horizontal line is aligned with at least one tip 88 and extends axially along the end portion 60 (although the circles are shown above the horizontal lines, it is understood that the horizontal lines coincide with the tips 88).
  • the end portion 60 includes a main portion positioned adjacent the proximal end 61 and the end ring bit assembly 98 positioned adjacent the distal end 63.
  • the end ring bit assembly 98 includes four bits 74a, each of which includes a tip 88a.
  • the tips 88a define a first cutting line 106.
  • two bits 74b each include tips 88b that define a second cutting line 110.
  • Two bits 74c each include tips 88c that define a third cutting line 1 14, and two bits 74d each include tips 88d that define a fourth cutting line 118.
  • each of the bits 74e in the main portion includes a tip 88e defining an individual cutting line; that is, none of the bits 74e are aligned along a common cutting line.
  • the cutting lines 106, 110, 114, 118 each define an individual cutting plane.
  • the first cutting line 106 is axially separated from the second cutting line 110 by a first distance D ls the second cutting line 110 is axially separated from the third cutting line 114 by a second distance D 2 , the third cutting line 114 is axially separated from the fourth cutting line 118 by a third distance D 3 , and the fourth cutting line 118 is axially separated from the cutting bit 74e that is adjacent the end ring bit assembly 98 by a fourth distance D 4 .
  • the first distance Di is between about 27 millimeters and 47 millimeters
  • the second distance D 2 is between about 60 millimeters and 80 millimeters
  • the third distance D 3 is between about 67 millimeters and 87 millimeters
  • the fourth distance D 4 is between about 62 millimeters and 82 millimeters.
  • the first distance Di is about 37 millimeters
  • the second distance D 2 is about 70 millimeters
  • the third distance D 3 is about 77 millimeters
  • the fourth distance D 4 is about 72 millimeters.
  • the end ring bit assembly 98 engages the mine surface and completes a cutting sequence.
  • the cutting sequence includes engaging the mine surface with the tips of the end ring bits in the following order: bit 74d, bit 74b, bit 74a, bit 74c, bit 74a, bit 74d, bit 74b, bit 74a, bit 74c, and bit 74a. Consequently, the end ring bit assembly 98 includes ten bits 74 that each engages the mine surface.
  • the outermost bits 74a engage the mine surface twice as frequently compared to each of the bits 74b, 74c, 74d (four times per rotation compared to two times per rotation) and four times as frequently compared to each bit 74e on the main portion (four time per rotation compared to once per rotation for each bit 74e).
  • the tips 88a, 88b, 88c, 88d, of the bits 74a, 74b, 74c, 74d are angularly spaced apart from each other by a circumferential angle (pi about the drum axis 70.
  • Each tip 88a, 88b, 88c, 88d is spaced apart from the nearest adjacent tip by an angle, and the angle is equal for each of the tips 88a, 88b, 88c, 88d.
  • the tips 88a, 88b, 88c, 88d are equally spaced around the drum 62.
  • the circumferential angle (pi between each tip 88a, 88b, 88c, 88d of the end ring bit assembly 98 is about 36 degrees. In one embodiment, the circumferential angle ⁇ 2 between adjacent tips 88e of the main portion is about 22.5 degrees. In other embodiments, the circumferential angle between adjacent bits may be more or less, and/or the circumferential angle between the bits may be non-uniform such that the space between some bits is greater than the space between others.
  • the improved configuration of the end ring bit assembly 98 (the combination of cutting bits 74 with the attack angle ⁇ , the lean angles ⁇ ⁇ - ⁇ ⁇ , the circumferential angle ⁇ , and/or the axial distances Di_ D 4 ) causes the reaction forces applied to the bits 74a, 74b, 74c, 74d to be more evenly distributed such that the tips 88a, 88b, 88c, 88d reducing the risk of premature failure of a bit or a group of bits due to overloading.
  • the configuration of the end ring bit assembly 98 inhibits direct contact between the mine surface and the elongated drum 62, the pedestals 68, the holder blocks 82, and/or the sleeves 78, thereby preventing sparks.
  • all of the bits 74a-74e on the drum 62 include the same effective attack angle, providing more even distribution of cutting forces over the bits 74a-74e and providing a rotationally balanced cutter head 26 to reduce cutting vibrations during a mining operation.
  • the invention provides, among other things, a bit configuration for a cutter head.

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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 une tête de coupe pour haveuse, comprenant un tambour délimitant un axe de tambour, un plan de tambour s'étendant perpendiculairement à l'axe de tambour. La tête de coupe comprend une pluralité d'ensembles trépans fixés à une surface extérieure du tambour à proximité d'une première extrémité. Chaque ensemble trépan comprend un bloc et un trépan. Le trépan comprend une pointe conçue pour venir en prise avec une surface de mine. Le trépan définit un axe de trépan et l'axe de trépan délimite un premier angle d'inclinaison par rapport au plan de tambour. La pluralité d'ensembles trépans comprend une première série de quatre premiers trépans, une deuxième série de deux deuxièmes trépans, une troisième série de deux troisièmes trépans et une quatrième série de deux quatrièmes trépans. Chacun des premiers trépans comprend une première pointe et délimite un premier axe de trépan orienté selon un premier angle d'inclinaison par rapport au plan de tambour. Le premier angle d'inclinaison est compris entre environ 60 degrés et environ 75 degrés.
PCT/US2015/039964 2015-07-10 2015-07-10 Configuration de trépan destinée à une tête de coupe Ceased WO2017010975A1 (fr)

Priority Applications (3)

Application Number Priority Date Filing Date Title
AU2015402506A AU2015402506B2 (en) 2015-07-10 2015-07-10 Bit configuration for a cutter head
PCT/US2015/039964 WO2017010975A1 (fr) 2015-07-10 2015-07-10 Configuration de trépan destinée à une tête de coupe
CA2991742A CA2991742C (fr) 2015-07-10 2015-07-10 Configuration de trepan destinee a une tete de coupe

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US2015/039964 WO2017010975A1 (fr) 2015-07-10 2015-07-10 Configuration de trépan destinée à une tête de coupe

Publications (1)

Publication Number Publication Date
WO2017010975A1 true WO2017010975A1 (fr) 2017-01-19

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PCT/US2015/039964 Ceased WO2017010975A1 (fr) 2015-07-10 2015-07-10 Configuration de trépan destinée à une tête de coupe

Country Status (3)

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AU (1) AU2015402506B2 (fr)
CA (1) CA2991742C (fr)
WO (1) WO2017010975A1 (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4310199A (en) * 1979-09-20 1982-01-12 National Mine Service Company Cutter drum assembly for a continuous mining machine
US5647641A (en) * 1995-05-08 1997-07-15 Kennametal Inc. Bar for a road milling drum
US5842747A (en) * 1997-02-24 1998-12-01 Keystone Engineering & Manufacturing Corporation Apparatus for roadway surface reclaiming drum
US6315365B1 (en) * 1998-11-04 2001-11-13 Tamrock Voest-Alphien Bergtechnik Gesellschaft M.B.H. Mining machine with core breakers
CN102758623A (zh) * 2012-07-31 2012-10-31 江苏中机矿山设备有限公司 一种混排刀具截割头

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4310199A (en) * 1979-09-20 1982-01-12 National Mine Service Company Cutter drum assembly for a continuous mining machine
US5647641A (en) * 1995-05-08 1997-07-15 Kennametal Inc. Bar for a road milling drum
US5842747A (en) * 1997-02-24 1998-12-01 Keystone Engineering & Manufacturing Corporation Apparatus for roadway surface reclaiming drum
US6315365B1 (en) * 1998-11-04 2001-11-13 Tamrock Voest-Alphien Bergtechnik Gesellschaft M.B.H. Mining machine with core breakers
CN102758623A (zh) * 2012-07-31 2012-10-31 江苏中机矿山设备有限公司 一种混排刀具截割头

Also Published As

Publication number Publication date
CA2991742A1 (fr) 2017-01-19
CA2991742C (fr) 2023-02-14
AU2015402506A1 (en) 2018-01-25
AU2015402506B2 (en) 2021-06-24

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