WO2006065201A1 - A grinding machine setting arrangement - Google Patents

A grinding machine setting arrangement Download PDF

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Publication number
WO2006065201A1
WO2006065201A1 PCT/SE2005/001856 SE2005001856W WO2006065201A1 WO 2006065201 A1 WO2006065201 A1 WO 2006065201A1 SE 2005001856 W SE2005001856 W SE 2005001856W WO 2006065201 A1 WO2006065201 A1 WO 2006065201A1
Authority
WO
WIPO (PCT)
Prior art keywords
arm
holder
grinding
setting mechanism
setting
Prior art date
Application number
PCT/SE2005/001856
Other languages
French (fr)
Inventor
Hans Lindgren
Original Assignee
Atlas Copco Secoroc Ab
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 Atlas Copco Secoroc Ab filed Critical Atlas Copco Secoroc Ab
Priority to CA002588835A priority Critical patent/CA2588835A1/en
Publication of WO2006065201A1 publication Critical patent/WO2006065201A1/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B3/00—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools
    • B24B3/24—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of drills
    • B24B3/33—Sharpening cutting edges, e.g. of tools; Accessories therefor, e.g. for holding the tools of drills of drills for stone
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B24—GRINDING; POLISHING
    • B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
    • B24B41/00—Component parts such as frames, beds, carriages, headstocks
    • B24B41/06—Work supports, e.g. adjustable steadies

Definitions

  • the present invention relates to a grinding machine setting arrangement and more particularly to a rig mounted grinding machine for grinding button drill bits or crowns.
  • Button bits are subjected to a great deal of wear and must be well sharpened or honed in order to be able to drill rock effectively. Poorly ground bits not only result in impairment of drilling efficiency but also result in significant strain and wear on the drill pipe and rig.
  • a grinding machine setting arrangement which enables the drill bit to be ground to be readily positioned relative to the grinding machine and firmly locked in this position.
  • the grinding machine includes a grinding unit which is mounted for displacement in the vertical plane and wherein the drill bit is carried by a holder that can be moved in the horizontal plane so that each button in the button bit can be centered in relation to the grinding disc of the grinding unit, wherein the holder carrying the drill bit can be locked in each bit setting relative to the grinding unit, wherein the holder is connected to a fixed attachment by means of a setting mechanism which includes a first elongate arm that extends out from the holder and a second arm which also extends from the holder although from a different point thereon than said first arm, wherein the first arm includes a longitudinally extending slot and the second arm includes a slot that intersects the slot in the first arm, and wherein the holder has connected thereto a
  • Fig. 1 is a perspective view of a setting mechanism according to the invention as seen obliquely from beneath;
  • Fig. 2 is a plan view of the setting mechanism according to the invention as seen from below;
  • Fig. 3 is a view of the setting mechanism according to the invention as seen directly from one side;
  • Fig. 4 is a view of the setting mechanism according to the invention as seen from the attachment side.
  • the setting mechanism 1 is intended for a rig mounted grinding machine which includes a grinding unit mounted for displacement in the vertical plane with the button bit to be ground carried by a holder.
  • the setting mechanism includes an attachment means 3 which is connected to the grinding machine which, in turn, is firmly mounted to a drilling rig.
  • an attachment means 3 which is connected to the grinding machine which, in turn, is firmly mounted to a drilling rig.
  • a holder attachment 2 for supporting a holder which, in turn, supports the button bit to be ground.
  • the setting mechanism also includes a first arm, an elongate arm 4, which extends out from the holder attachment 2 to a locking device 10.
  • the elongate arm 4 includes an elongate slot 5 which extends in the longitudinal direction of the arm 4.
  • the setting mechanism also includes a second arm, an angular arm 6, which is connected to the holder attachment 2 via an intermediate arm 7 and" which extends towards the locking device 10.
  • the angular arm 6 includes a curved slot 8 which extends in an arc around the outer part of the angular arm 6.
  • the two slots 5 and 8 mutually intersect and a locking pin 9 belonging to said locking device extends through respective slots, as described in more detail hereinafter.
  • the locking device is mounted in the grinding machine and functions to lock the holder attachment means firmly in relation to the elongate arm 4 and the angular arm 6.
  • the elongate arm 4 and the intermediate arm 7 are both ro- tatably or pivotally connected to the holder attachment 2 through the medium of respective bearings 11 and 12.
  • the angular arm is, in turn, rotatably or pivotally connected to the intermediate arm 7.
  • the bearings 11 and 12 are mutually spaced at the holder attachment.
  • the journals 11 and 12 and the locking pin 9 that extends through the slots 5 and 8 in the elongate arm 4 and the angular arm 6 enable the elongate arm 4 and the angular arm 6 to be moved to selected points within a defined area in the horizontal plane, provided that the locking device 10 is not active in locking the elongate arm 4 and the angular arm 6 relative to one another.
  • the defined area is determined by placement of the pivot journals on the one hand and by the lengths of the slots 5, 8 and their positions in relation to the journals 11 and 12 on the other. Correct dimensioning of the arms and the journals will herewith allow the holder attachment 2 to be moved in the horizontal plane so that a button bit carried by the holder can be brought to respective positions in which each button bit is positioned precisely beneath the grinding disc of the grinding unit.
  • the locking device is seated firmly in the grinding machine and includes a locking pin 9 which ex- tends through the slots 5 and 8 in the elongate arm 4 and the angular arm 6 respectively.
  • the free end of the locking pin carries a counter pressure element.
  • the locking device 10 also includes a spring mechanism 13 which is adapted to press normally against the elongate arm 4 and therewith lock the arm to the angular arm 6, such as to lock the holder attachment 2, and therewith also the drill bit carried indirectly by the holder attachment, against movement in the horizontal plane.
  • the locking device includes an actuator which moves the spring mechanism out of abutment with the elongate arm 4 and therefore no longer locks the holder attachment 2, thus allowing the holder attachment 2 to be moved to an appropriate bit grinding position
  • the actuator may be controlled hydraulically or pneumatically, such as to move the spring means 13 out of abutment with the arms 4, 6 in response to hydraulic or pneumatic pressure. It will be understood, however, that the actuator may be driven in some other way, such as by an elec- trie motor or simply manually in the case of an eccentric lock, e.g.
  • the locking device 10 has been described above as being designed to be brought to a locking mode with the aid of a spring force and to a release mode with the aid of a pressure medium, it will be understood that the reverse action is possible, wherewith pressure medium is supplied to lock the setting mechanism firmly in a set position and wherewith the setting mechanism is otherwise free to move.
  • the locking device 10 may be maneuvered conveniently by means of a handle (not shown) which is placed on the holder attachment and which can also be used to move the holder attachment physically so that pressure medium will be delivered to the locking device immediately the handle is pressed down, therewith also enabling the handle to be used as a means of positioning the setting mechanism 1 so that a drill bit carried by the holder attachment 2 of the setting mechanism can be placed in position beneath the grinding disc of the grind- ing unit.
  • a handle (not shown) which is placed on the holder attachment and which can also be used to move the holder attachment physically so that pressure medium will be delivered to the locking device immediately the handle is pressed down, therewith also enabling the handle to be used as a means of positioning the setting mechanism 1 so that a drill bit carried by the holder attachment 2 of the setting mechanism can be placed in position beneath the grinding disc of the grind- ing unit.
  • the setting mechanism 1 may be maneuverable solely when the grinding unit is in a raised or elevated state and cannot therefore come into con- tact with a drill bit that is to be ground, and for the reverse to be applicable so that the grinding unit can only be lowered down towards the drill bit when the setting mechanism 1 is locked.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)

Abstract

The invention relates to a grinding machine setting arrangement for grinding button bits or crowns, wherein the grinding machine includes a grinding unit which is mounted for displacement in the vertical plane and wherein the drill bit is carried by a holder (2) that can be moved in the horizontal plane so that each button in the button bit can be centered in relation to the grinding disc of the grinding unit, wherein the holder (2) carrying the drill bit can be locked in each bit-setting relative to the grinding unit, wherein the holder (2) is connected to a fixed attachment (3) by means of a setting mechanism (1). The setting mechanism (1) includes a first elongate arm (4) that extends out from the holder (2) and a second arm (6) which also extends from the holder (2) although from a different point thereon than said first arm, wherein the first arm (4) includes a longitudinally extending slot (5) and the second arm (6) includes a slot (8) that intersects the slot (5) in the first arm, and wherein the fixed attachment (3) has connected thereto a locking device (10) which includes a locking pin (9) that extends through both of the slots (5, 8) in said arms (4, 6) and which further includes a locking mechanism that is adapted to firmly lock the locking device (10) and therewith both arms (4, 6) in their respective selected settings.

Description

A grinding machine setting arrangement
The present invention relates to a grinding machine setting arrangement and more particularly to a rig mounted grinding machine for grinding button drill bits or crowns.
Button bits are subjected to a great deal of wear and must be well sharpened or honed in order to be able to drill rock effectively. Poorly ground bits not only result in impairment of drilling efficiency but also result in significant strain and wear on the drill pipe and rig.
It is therefore highly necessary to ' sharpen or hone button bits at regular intervals. Special semiautomatic machines for grinding the buttons have been made available to the art, and also for grounding down the steel that includes the buttons. Also available are transportable grinders which enable bits to be ground on the drilling site. These grinders may be semiautomatic or operated manually and are exclusively of the type that uses grinding cups.
There has therefore been provided a grinder of this kind that can function at least semi automatically and that can be fitted to a drilling rig or to a readily transported separate device. Such a grinder is described in WO 2004/080651 Al. One difficulty that is overcome with the aid of such a grinder resides in enabling the drill bit to be ground to be centered readily beneath the grinder and there firmly locked in position.
Accordingly it is an object of the present invention to provide a grinding machine setting arrangement which enables the drill bit to be ground to be readily positioned relative to the grinding machine and firmly locked in this position. This object is achieved with a grinding machine setting arrangement for grinding button bits or crowns, wherein the grinding machine includes a grinding unit which is mounted for displacement in the vertical plane and wherein the drill bit is carried by a holder that can be moved in the horizontal plane so that each button in the button bit can be centered in relation to the grinding disc of the grinding unit, wherein the holder carrying the drill bit can be locked in each bit setting relative to the grinding unit, wherein the holder is connected to a fixed attachment by means of a setting mechanism which includes a first elongate arm that extends out from the holder and a second arm which also extends from the holder although from a different point thereon than said first arm, wherein the first arm includes a longitudinally extending slot and the second arm includes a slot that intersects the slot in the first arm, and wherein the holder has connected thereto a locking device which includes a locking pin that extends through both of the slots in said arms and which further includes a locking mechanism that is adapted to firmly lock the locking device and therewith also the arms in their selected settings.
The invention will now be described in more detail with ref- erence to non-limiting embodiments and also with reference to the accompanying drawings, in which Fig. 1 is a perspective view of a setting mechanism according to the invention as seen obliquely from beneath; Fig. 2 is a plan view of the setting mechanism according to the invention as seen from below; Fig. 3 is a view of the setting mechanism according to the invention as seen directly from one side; and Fig. 4 is a view of the setting mechanism according to the invention as seen from the attachment side. According to the present invention, the setting mechanism 1 is intended for a rig mounted grinding machine which includes a grinding unit mounted for displacement in the vertical plane with the button bit to be ground carried by a holder. As illustrated in the accompanying drawings, the setting mechanism according to the present invention includes an attachment means 3 which is connected to the grinding machine which, in turn, is firmly mounted to a drilling rig. Provided on the opposite side of the setting mechanism is a holder attachment 2 for supporting a holder which, in turn, supports the button bit to be ground.
As will be seen from Fig. 1, the setting mechanism also includes a first arm, an elongate arm 4, which extends out from the holder attachment 2 to a locking device 10. The elongate arm 4 includes an elongate slot 5 which extends in the longitudinal direction of the arm 4. The setting mechanism also includes a second arm, an angular arm 6, which is connected to the holder attachment 2 via an intermediate arm 7 and" which extends towards the locking device 10. The angular arm 6 includes a curved slot 8 which extends in an arc around the outer part of the angular arm 6. The two slots 5 and 8 mutually intersect and a locking pin 9 belonging to said locking device extends through respective slots, as described in more detail hereinafter. The locking device is mounted in the grinding machine and functions to lock the holder attachment means firmly in relation to the elongate arm 4 and the angular arm 6.
The elongate arm 4 and the intermediate arm 7 are both ro- tatably or pivotally connected to the holder attachment 2 through the medium of respective bearings 11 and 12. The angular arm is, in turn, rotatably or pivotally connected to the intermediate arm 7. As will be seen from the Figures, the bearings 11 and 12 are mutually spaced at the holder attachment. The journals 11 and 12 and the locking pin 9 that extends through the slots 5 and 8 in the elongate arm 4 and the angular arm 6 enable the elongate arm 4 and the angular arm 6 to be moved to selected points within a defined area in the horizontal plane, provided that the locking device 10 is not active in locking the elongate arm 4 and the angular arm 6 relative to one another. The defined area is determined by placement of the pivot journals on the one hand and by the lengths of the slots 5, 8 and their positions in relation to the journals 11 and 12 on the other. Correct dimensioning of the arms and the journals will herewith allow the holder attachment 2 to be moved in the horizontal plane so that a button bit carried by the holder can be brought to respective positions in which each button bit is positioned precisely beneath the grinding disc of the grinding unit.
As earlier mentioned the locking device is seated firmly in the grinding machine and includes a locking pin 9 which ex- tends through the slots 5 and 8 in the elongate arm 4 and the angular arm 6 respectively. The free end of the locking pin carries a counter pressure element. The locking device 10 also includes a spring mechanism 13 which is adapted to press normally against the elongate arm 4 and therewith lock the arm to the angular arm 6, such as to lock the holder attachment 2, and therewith also the drill bit carried indirectly by the holder attachment, against movement in the horizontal plane. In order to enable the locking device 10 to be released and the spring mechanism to be retracted, the locking device includes an actuator which moves the spring mechanism out of abutment with the elongate arm 4 and therefore no longer locks the holder attachment 2, thus allowing the holder attachment 2 to be moved to an appropriate bit grinding position The actuator may be controlled hydraulically or pneumatically, such as to move the spring means 13 out of abutment with the arms 4, 6 in response to hydraulic or pneumatic pressure. It will be understood, however, that the actuator may be driven in some other way, such as by an elec- trie motor or simply manually in the case of an eccentric lock, e.g.
Although the locking device 10 has been described above as being designed to be brought to a locking mode with the aid of a spring force and to a release mode with the aid of a pressure medium, it will be understood that the reverse action is possible, wherewith pressure medium is supplied to lock the setting mechanism firmly in a set position and wherewith the setting mechanism is otherwise free to move.
The locking device 10 may be maneuvered conveniently by means of a handle (not shown) which is placed on the holder attachment and which can also be used to move the holder attachment physically so that pressure medium will be delivered to the locking device immediately the handle is pressed down, therewith also enabling the handle to be used as a means of positioning the setting mechanism 1 so that a drill bit carried by the holder attachment 2 of the setting mechanism can be placed in position beneath the grinding disc of the grind- ing unit.
It may be appropriate to arrange for the setting mechanism 1 to be maneuverable solely when the grinding unit is in a raised or elevated state and cannot therefore come into con- tact with a drill bit that is to be ground, and for the reverse to be applicable so that the grinding unit can only be lowered down towards the drill bit when the setting mechanism 1 is locked. '

Claims

Claims
1. A grinding machine setting arrangement for grinding button bits or crowns, wherein the grinding machine includes a grinding unit which is mounted for displacement in the vertical plane and wherein the drill bit is carried by a holder (2) that can be moved in the horizontal plane so that each button in the button bit can be centered in relation to the grinding disc of the grinding unit, wherein the holder (2) carrying the drill bit can be locked in each bit-setting relative to the grinding unit, and wherein the holder (2) is connected to a fixed attachment (3) by means of a setting mechanism (1) , c h a r a c t e r i z e d in that the setting mechanism (1) includes a first elongate arm (4) that extends out from the holder (2) and a second arm (6) which also extends from the holder (2) although from a different point thereon than said first arm, wherein the first arm (4) includes a longitudinally extending slot (5) and the second arm (6) includes a slot (8) that intersects the slot (5) in the first arm, and in that the fixed attachment means (3) has connected thereto a locking device (10) which includes a locking pin (9) that extends through both of the slots (5, 8) in said arms (4, 6) and which further includes a locking mechanism that is adapted to firmly lock the locking device (10) and therewith both arms (4, 6) in their respective selected settings.
2. A setting mechanism according to Claim 1, c h a r a c t e r i z e d in that the second arm (6) includes a curved slot (8 ) .
3. A setting mechanism according to Claim 2, c h a r a c t e r i z e d in that the second arm (6) is rotatably or pivo- tally connected to an intermediate arm (7) which, in turn, is rotatably or pivotally connected to the holder (2) .
4. A setting mechanism according to any one of claims 1 - 3, c h a r a c t e r i z e d in that the slot (5) in the first elongate arm (4) is straight.
5. A setting mechanism according to any one of the preceding claims, c h a r a c t e r i z e d in that the locking device (10) includes a spring force (13) which is adapted to maintain the locking device normally in a locked state and therewith lock together both arms (4, 6) and the holder (2) ; and in that the spring force (13) can be released for movement and setting of the holder (2) .
6. A setting mechanism according to claim 5, c h a r a c t e r i z e d in that the spring force (13) can be relieved with the aid of pressure.
PCT/SE2005/001856 2004-12-15 2005-12-07 A grinding machine setting arrangement WO2006065201A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA002588835A CA2588835A1 (en) 2004-12-15 2005-12-07 A grinding machine setting arrangement

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0403043A SE527994C2 (en) 2004-12-15 2004-12-15 Adjusting arrangement for a grinding machine for grinding pin drill bits
SE0403043-3 2004-12-15

Publications (1)

Publication Number Publication Date
WO2006065201A1 true WO2006065201A1 (en) 2006-06-22

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ID=33563206

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE2005/001856 WO2006065201A1 (en) 2004-12-15 2005-12-07 A grinding machine setting arrangement

Country Status (3)

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CA (1) CA2588835A1 (en)
SE (1) SE527994C2 (en)
WO (1) WO2006065201A1 (en)

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE428541B (en) * 1979-09-12 1983-07-11 Finsliparna Ab Arrangement for restoring the shape of worn boring bits by grinding
SE434356B (en) * 1981-11-24 1984-07-23 Finsliparna Ab Arrangement for grinding of drill bits
US4858388A (en) * 1986-07-25 1989-08-22 Bice Keith C Restoration or drill buttons
SE467347B (en) * 1988-10-17 1992-07-06 Constr Mining Equip Cme SELF-CENTERING DEVICE FOR GRINDING HARD METAL PIN ON DRILL CHRONICLE
SE512081C2 (en) * 1998-06-26 2000-01-24 Sandvik Ab Fixture and grinding machine for grinding pins on a rock drill bit
SE525559C2 (en) * 2000-07-10 2005-03-08 Cme Blasting & Mining Equip Grinding device for grinding tunnel boring machine inserts, step drilling machine inserts or pins of rock drill bits

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE428541B (en) * 1979-09-12 1983-07-11 Finsliparna Ab Arrangement for restoring the shape of worn boring bits by grinding
SE434356B (en) * 1981-11-24 1984-07-23 Finsliparna Ab Arrangement for grinding of drill bits
US4858388A (en) * 1986-07-25 1989-08-22 Bice Keith C Restoration or drill buttons
SE467347B (en) * 1988-10-17 1992-07-06 Constr Mining Equip Cme SELF-CENTERING DEVICE FOR GRINDING HARD METAL PIN ON DRILL CHRONICLE
SE512081C2 (en) * 1998-06-26 2000-01-24 Sandvik Ab Fixture and grinding machine for grinding pins on a rock drill bit
SE525559C2 (en) * 2000-07-10 2005-03-08 Cme Blasting & Mining Equip Grinding device for grinding tunnel boring machine inserts, step drilling machine inserts or pins of rock drill bits

Also Published As

Publication number Publication date
SE0403043L (en) 2006-06-16
SE0403043D0 (en) 2004-12-15
SE527994C2 (en) 2006-08-01
CA2588835A1 (en) 2006-06-22

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