WO2003089761A1 - Rock cutting machine - Google Patents

Rock cutting machine Download PDF

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Publication number
WO2003089761A1
WO2003089761A1 PCT/AU2003/000474 AU0300474W WO03089761A1 WO 2003089761 A1 WO2003089761 A1 WO 2003089761A1 AU 0300474 W AU0300474 W AU 0300474W WO 03089761 A1 WO03089761 A1 WO 03089761A1
Authority
WO
WIPO (PCT)
Prior art keywords
boom
axis
rock
pivot axis
cutting device
Prior art date
Application number
PCT/AU2003/000474
Other languages
French (fr)
Inventor
David Burnet Sugden
Karakel Shivakumar
Paul Carnavas
Original Assignee
Odyssey Technology Pty Ltd
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 Odyssey Technology Pty Ltd filed Critical Odyssey Technology Pty Ltd
Priority to AU2003221621A priority Critical patent/AU2003221621B2/en
Priority to US10/512,192 priority patent/US7325882B2/en
Priority to EP03717031.3A priority patent/EP1497534B1/en
Priority to CA002484394A priority patent/CA2484394C/en
Publication of WO2003089761A1 publication Critical patent/WO2003089761A1/en
Priority to ZA2004/08076A priority patent/ZA200408076B/en

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
    • E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
    • E21D9/10—Making by using boring or cutting machines
    • E21D9/1006—Making by using boring or cutting machines with rotary cutting tools
    • E21D9/1013—Making by using boring or cutting machines with rotary cutting tools on a tool-carrier supported by a movable boom
    • E21D9/102—Making by using boring or cutting machines with rotary cutting tools on a tool-carrier supported by a movable boom by a longitudinally extending boom being pivotable about a vertical and a transverse axis
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C25/00—Cutting machines, i.e. for making slits approximately parallel or perpendicular to the seam
    • E21C25/16—Machines slitting solely by one or more rotating saws, cutting discs, or wheels

Definitions

  • This invention relates to a rock cutting machine and has been devised particularly, though not solely for mining rock faces.
  • the present invention therefore provides a rock cutting machine including: a boom rotatably mounted at a proximal end to a chassis adapted to be placed adjacent a rock face to be cut such that the boom extends from the chassis to a distal end adjacent the rock face, the boom having a longitudinal boom axis extending between the proximal and the distal ends, and a cutting device having a longitudinal axis and being pivotally mounted to the boom about a pivot axis at or adjacent the distal end of the boom and caused to pivot in use about the pivot axis by a drive mechanism, the pivot axis being offset from the longitudinal axis of the cutting device.
  • the cutting device is an oscillating disc cutter and the longitudinal axis of the cutting device is collinear with the axis of oscillation of the disc.
  • the pivot axis is offset from the longitudinal axis of the cutting device by a distance sufficient to cause the cutting disc on the oscillating disc cutter to withdraw slightly from the rock face in use during pivoting of the oscillating disc cutter about the pivot axis.
  • the longitudinal axis of the cutting device is adjustable with respect to the pivot axis.
  • the longitudinal axis of the cutting device is laterally adjustable from a position on a first side of the pivot axis to a position on an opposing side of the pivot axis.
  • the boom is rotatably mounted to the chassis about mutually orthogonal rotation axes.
  • the rotation axes are vertical and horizontal when the chassis is on a level surface.
  • the boom is also rotatable about the longitudinal boom axis, allowing the orientation of the offset to be altered in use relative to the rock face.
  • Fig 1 is a plan view of a rock cutting machine according to the invention
  • Fig 2 is a plan view of an alternative embodiment of a rock cutting machine according to the invention
  • Fig 3 is another plan view of the embodiment shown in Fig. 2.
  • a cutting device 10 of the type generally described in international patent specification PCT/AU00/00030 is mounted on a boom 11 which in turn is rotatably mounted about a vertical rotation axis 12 to a chassis 13 adapted to be placed adjacent a rock face 14 to be cut.
  • the boom 11 is typically mounted on a turntable 15 and rotated about the vertical rotation axis 12 by operation of piston and cylinder assemblies 16 and 17.
  • the boom is also rotatable about a horizontal axis 27 to control the elevation of the cutting device 10, and is rotatable about the longitudinal axis 21 of the boom by piston and cylinder assemblies 28.
  • the distal end 18 of the boom 11 is provided with a mounting yolk 19 incorporating bearings arranged to rotatably support a mounting pin or the like and forming a pivot axis 20 about which the cutting device 10 can pivot relative to the longitudinal axis 21 of the boom 11.
  • the cutting device 10 has a cutting disc 22 engageable with the rock face 14 and has an axis 23 about which the cutting disc oscillates.
  • the cutting device 10 is of the type generally described in PCT/AU00/00030, it will be appreciated that various types of similar cutting devices may be used, with or without the nutating feature described in that patent specification.
  • the pivot axis 20 is offset from the axis 23 by a distance 24.
  • the edge 25 of the disc cutter 22 that is actively engaging the rock face 14 is pivoting about the pivot axis 20 at a radius Rl.
  • the forces acting on the leading edge 25 of the cutter 22, have components both parallel to axis 23 and perpendicular thereto, tending to cause the angle 26 between the axis 23 of the cutter shaft and the longitudinal axis 21 of the boom 11, to increase.
  • hydraulic cylinders 29 These forces are typically reacted by one or more hydraulic cylinders 29.
  • the hydraulic cylinders also provide for actuation of the cutter about the pivot axis 20.
  • the offset also results in a change of the angle of the cutting edge of cutting disc 22 relative to the face 14 which has the effect of preserving the sharpness of the cutting edge.
  • FIG. 2 A modification to the invention is shown in Figure 2 in which like numbers refer to like parts as shown in the preceding description of Figure 1.
  • the cutting device is laterally movable, with respect to the arm axis 21 and yolk 19.
  • the offset of the pivot axis 21 is achieved with a 19 is symmetrical mounting yolk in comparison to that shown in Figure 1.
  • the lateral movement may be effected in a number of ways including eccentric cams, sliders or tracks mounted to either the cutting device, the yolk or an intermediate part.
  • Figure 2 shows a hydraulically operated slider 30.
  • the lateral movement allows the pivot axis 20 to be set on either side of the cutting disc axis, as can be seen by comparing Figures 2 and 3.
  • the cutting device may be operated in bi-directional sweeps across the rock face without the need to rotate the entire cutting device around axis 21 as is required with the embodiment shown in Figure 1.
  • this functionality reduces the time between sweeps thereby increasing efficiency.

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  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Mechanical Engineering (AREA)
  • Environmental & Geological Engineering (AREA)
  • Earth Drilling (AREA)
  • Shovels (AREA)

Abstract

A rock cutting machine including a boom (11) rotatably mounted at a proximal end to a chassis (13) adapted to be placed adjacent a rock face (14) to be cut. The boom extends from the chassis to a distal end adjacent the rock face. A longitudinal boom axis (21) extends between the proximal and the distal ends of the boom and a cutting device (10) is pivotally mounted about a pivot axis (20) adjacent the distal end of the boom. The pivot axis enables wrist movement about the pivot axis by a drive mechanism (29) and is offset from the longitudinal axis of the cutting device (23).

Description

TITLE: ROCK CUTTING MACHINE
FIELD OF THE INVENTION
This invention relates to a rock cutting machine and has been devised particularly, though not solely for mining rock faces.
BACKGROUND OF THE INVENTION
This invention is a development of the oscillating disc cutter constructions described in international patent applications PCT/AUOO/00030 and PCT/AU00/00066, the contents of which are incorporated herein by way of cross reference. Reference to these two international patent specifications should not be regarded as an admission that the constructions shown in these specifications form part of the common general knowledge in Australia or anywhere else in the world.
It is desirable to provide an oscillating disc cutter, which has advantages over previously known roller cutters for all of the reasons mentioned in the aforementioned international patent specifications, which is also economical to operate due to factors such as reduced power consumption or reduced wear on the cutter disc.
It is an object of the present invention to overcome or ameliorate at least one of the disadvantages of the prior art, or to provide a useful alternative.
SUMMARY OF THE INVENTION
The present invention therefore provides a rock cutting machine including: a boom rotatably mounted at a proximal end to a chassis adapted to be placed adjacent a rock face to be cut such that the boom extends from the chassis to a distal end adjacent the rock face, the boom having a longitudinal boom axis extending between the proximal and the distal ends, and a cutting device having a longitudinal axis and being pivotally mounted to the boom about a pivot axis at or adjacent the distal end of the boom and caused to pivot in use about the pivot axis by a drive mechanism, the pivot axis being offset from the longitudinal axis of the cutting device. Preferably, the cutting device is an oscillating disc cutter and the longitudinal axis of the cutting device is collinear with the axis of oscillation of the disc. Preferably, the pivot axis is offset from the longitudinal axis of the cutting device by a distance sufficient to cause the cutting disc on the oscillating disc cutter to withdraw slightly from the rock face in use during pivoting of the oscillating disc cutter about the pivot axis.
Preferably, the longitudinal axis of the cutting device is adjustable with respect to the pivot axis. Preferably, the longitudinal axis of the cutting device is laterally adjustable from a position on a first side of the pivot axis to a position on an opposing side of the pivot axis.
Preferably, the boom is rotatably mounted to the chassis about mutually orthogonal rotation axes. Preferably, the rotation axes are vertical and horizontal when the chassis is on a level surface.
Preferably, the boom is also rotatable about the longitudinal boom axis, allowing the orientation of the offset to be altered in use relative to the rock face.
BRIEF DESCRIPTION OF THE DRAWINGS A preferred embodiment of the invention will now be described, by way of example only, with reference to the accompanying drawings in which:
Fig 1 is a plan view of a rock cutting machine according to the invention; Fig 2 is a plan view of an alternative embodiment of a rock cutting machine according to the invention; and Fig 3 is another plan view of the embodiment shown in Fig. 2.
DETAILED DESCRIPTION OF THE INVENTION
Referring to the drawings, a cutting device 10 of the type generally described in international patent specification PCT/AU00/00030 is mounted on a boom 11 which in turn is rotatably mounted about a vertical rotation axis 12 to a chassis 13 adapted to be placed adjacent a rock face 14 to be cut. The boom 11 is typically mounted on a turntable 15 and rotated about the vertical rotation axis 12 by operation of piston and cylinder assemblies 16 and 17.
The boom is also rotatable about a horizontal axis 27 to control the elevation of the cutting device 10, and is rotatable about the longitudinal axis 21 of the boom by piston and cylinder assemblies 28.
The distal end 18 of the boom 11 is provided with a mounting yolk 19 incorporating bearings arranged to rotatably support a mounting pin or the like and forming a pivot axis 20 about which the cutting device 10 can pivot relative to the longitudinal axis 21 of the boom 11.
The cutting device 10 has a cutting disc 22 engageable with the rock face 14 and has an axis 23 about which the cutting disc oscillates. Although the cutting device 10 is of the type generally described in PCT/AU00/00030, it will be appreciated that various types of similar cutting devices may be used, with or without the nutating feature described in that patent specification.
The pivot axis 20 is offset from the axis 23 by a distance 24. With this arrangement, the edge 25 of the disc cutter 22 that is actively engaging the rock face 14 is pivoting about the pivot axis 20 at a radius Rl. The forces acting on the leading edge 25 of the cutter 22, have components both parallel to axis 23 and perpendicular thereto, tending to cause the angle 26 between the axis 23 of the cutter shaft and the longitudinal axis 21 of the boom 11, to increase.
These forces are typically reacted by one or more hydraulic cylinders 29. The hydraulic cylinders also provide for actuation of the cutter about the pivot axis 20.
As a result of the offset of pivot axis 20 from cutting disc axis 23, the effect of any increase in angle 26 is to cause the cutter to withdraw slightly from the face 14 and thereby to relieve the forces acting, when hard material is encountered.
The offset also results in a change of the angle of the cutting edge of cutting disc 22 relative to the face 14 which has the effect of preserving the sharpness of the cutting edge.
By rotating the boom about longitudinal axis 21 by operation of piston and cylinder devices 28, the effect of the offset may be realised in any desired plane of operation, allowing the aforesaid benefits to be optimised and controlled for various operating sweeps of the boom about either the vertical axis of rotation 12 or the horizontal axis of rotation 27, or combinations of both.
A modification to the invention is shown in Figure 2 in which like numbers refer to like parts as shown in the preceding description of Figure 1. In this embodiment, the cutting device is laterally movable, with respect to the arm axis 21 and yolk 19. In this way, the offset of the pivot axis 21 is achieved with a 19 is symmetrical mounting yolk in comparison to that shown in Figure 1. The lateral movement may be effected in a number of ways including eccentric cams, sliders or tracks mounted to either the cutting device, the yolk or an intermediate part. Figure 2 shows a hydraulically operated slider 30.
The lateral movement allows the pivot axis 20 to be set on either side of the cutting disc axis, as can be seen by comparing Figures 2 and 3. By positioning the axis in the required position, the cutting device may be operated in bi-directional sweeps across the rock face without the need to rotate the entire cutting device around axis 21 as is required with the embodiment shown in Figure 1. Advantageously, this functionality reduces the time between sweeps thereby increasing efficiency. It will be appreciated that if the pivot axis 20 intersects with the cutter axis 23 (as was previously the case in the construction described in international patent specification PCT/AUOO/00030), then when operating with the angle 26 close to zero, the radius Rl to the leading edge of the cutter is greater than the radius measured along the axis 23 and so there is a tendency for the leading edge to dig in to the rock face resulting in a detrimental effect on the life of the cutter. This disadvantage is obviated by offsetting the pivot axis 20 from the cutter axis 23. hi this manner, the life of the cutting disc is prolonged due to the relief in the forces acting between the cutting disc and the rock face when hard material is encountered. Although the invention has been described with reference to specific examples it will be appreciated by those skilled in the art that the invention may be embodied in many other forms.

Claims

1. A rock cutting machine including: a boom rotatably mounted at a proximal end to a chassis adapted to be placed adjacent a rock face to be cut such that the boom extends from the chassis to a distal end adjacent the rock face, the boom having a longitudinal boom axis extending between the proximal and the distal ends, and a cutting device having a longitudinal axis and being pivotally mounted to the boom about a pivot axis at or adjacent the distal end of the boom and caused to pivot in use about the pivot axis by a drive mechanism, the pivot axis being offset from the longitudinal axis of the cutting device.
2. A rock cutting machine according to claim 1 wherein the cutting device is an oscillating disc cutter and the longitudinal axis of the cutting device is collinear with the axis of oscillation of the disc.
3. A rock cutting machine according to claim 1 or 2 wherein the pivot axis is offset from the longitudinal axis of the cutting device by a distance sufficient to cause the cutting disc on the oscillating disc cutter to withdraw slightly from the rock face in use during pivoting of the oscillating disc cutter about the pivot axis.
4. A rock cutting machine according to any one of the preceding claims wherein the longitudinal axis of the cutting device is adjustable with respect to the pivot axis.
5. A rock cutting machine according to any one of the preceding claims wherein the longitudinal axis of the cutting device is laterally adjustable from a position on a first side of the pivot axis to a position on an opposing side of the pivot axis.
6. A rock cutting machine according to any one of the preceding claims wherein the boom is rotatably mounted to the chassis about mutually orthogonal rotation axes.
7. A rock cutting machine according to any one of the preceding claims wherein the rotation axes are vertical and horizontal when the chassis is on a level surface.
8. A rock cutting machine according to any one of the preceding claims wherein the boom is also rotatable about the longitudinal boom axis, allowing the orientation of the offset to be altered in use relative to the rock face.
PCT/AU2003/000474 2002-04-22 2003-04-22 Rock cutting machine WO2003089761A1 (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
AU2003221621A AU2003221621B2 (en) 2002-04-22 2003-04-22 Rock cutting machine
US10/512,192 US7325882B2 (en) 2002-04-22 2003-04-22 Rock cutting machine
EP03717031.3A EP1497534B1 (en) 2002-04-22 2003-04-22 Rock cutting machine
CA002484394A CA2484394C (en) 2002-04-22 2003-04-22 Rock cutting machine
ZA2004/08076A ZA200408076B (en) 2002-04-22 2004-10-06 Rock cutting machine

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AUPS1869A AUPS186902A0 (en) 2002-04-22 2002-04-22 Rock cutting machine
AUPS1869 2002-04-22

Publications (1)

Publication Number Publication Date
WO2003089761A1 true WO2003089761A1 (en) 2003-10-30

Family

ID=3835446

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/AU2003/000474 WO2003089761A1 (en) 2002-04-22 2003-04-22 Rock cutting machine

Country Status (7)

Country Link
US (1) US7325882B2 (en)
EP (1) EP1497534B1 (en)
CN (1) CN100436753C (en)
AU (2) AUPS186902A0 (en)
CA (1) CA2484394C (en)
WO (1) WO2003089761A1 (en)
ZA (1) ZA200408076B (en)

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CN102134995A (en) * 2010-01-22 2011-07-27 乔伊·姆·特拉华公司 Mining machine with driven disc cutters
CN102536226A (en) * 2012-02-15 2012-07-04 闫振东 Superposition arm three-roller large-mining-height coal mining machine
US8328292B2 (en) 2007-08-31 2012-12-11 Joy Mm Delaware, Inc. Mining machine with driven disc cutters
AU2011200183B2 (en) * 2010-01-22 2014-07-17 Joy Global Underground Mining Llc Mining Machine with Driven Disc Cutters
WO2016055382A1 (en) * 2014-10-06 2016-04-14 Sandvik Intellectual Property Ab Cutting apparatus and method of operating
CN105927221A (en) * 2016-06-01 2016-09-07 何满潮 Telescopic rocker arm, coal mining machine and coal mining method of coal mining machine
US9470087B2 (en) 2012-09-14 2016-10-18 Joy Mm Delaware, Inc. Cutter head for mining machine
US10533416B2 (en) 2016-09-23 2020-01-14 Joy Global Underground Mining Llc Rock cutting device
US10738608B2 (en) 2016-08-19 2020-08-11 Joy Global Underground Mining Llc Cutting device and support for same
US10876399B2 (en) 2016-01-27 2020-12-29 Joy Global Underground Mining Llc Mining machine with multiple cutter heads
US10876400B2 (en) 2016-08-19 2020-12-29 Joy Global Underground Mining Llc Mining machine with articulating boom and independent material handling system
US11319754B2 (en) 2018-07-25 2022-05-03 Joy Global Underground Mining Llc Rock cutting assembly
US11391149B2 (en) 2016-08-19 2022-07-19 Joy Global Underground Mining Llc Mining machine with articulating boom and independent material handling system
AU2020286272B2 (en) * 2007-08-31 2023-01-12 Joy Global Underground Mining Llc Mining Machine with Driven Disc Cutters

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CN102678110A (en) * 2012-05-05 2012-09-19 闫振东 Cutting-head type short-wall large-mining-height coal winning machine and comprehensive mechanized coal mining process
CN103742135B (en) * 2014-01-15 2016-09-07 上海安运输送设备有限公司 Rapid rectangular full-face tunnel boring machine for mining
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US9353622B2 (en) 2007-08-31 2016-05-31 Joy Mm Delaware, Inc. Mining machine with driven disc cutters
US8727450B2 (en) 2007-08-31 2014-05-20 Joy Mm Delaware, Inc. Mining machine with driven disc cutters
AU2020286272B2 (en) * 2007-08-31 2023-01-12 Joy Global Underground Mining Llc Mining Machine with Driven Disc Cutters
US8328292B2 (en) 2007-08-31 2012-12-11 Joy Mm Delaware, Inc. Mining machine with driven disc cutters
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EP1497534B1 (en) 2013-05-22
CN100436753C (en) 2008-11-26
AU2003221621A1 (en) 2003-11-03
EP1497534A4 (en) 2006-05-03
EP1497534A1 (en) 2005-01-19
CN1646787A (en) 2005-07-27
US20050200192A1 (en) 2005-09-15
CA2484394A1 (en) 2003-10-30
US7325882B2 (en) 2008-02-05
AUPS186902A0 (en) 2002-05-30
AU2003221621B2 (en) 2009-01-08
CA2484394C (en) 2009-07-28
ZA200408076B (en) 2014-03-26

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