EP0687803A1 - Mineralschneidmeissel - Google Patents

Mineralschneidmeissel Download PDF

Info

Publication number
EP0687803A1
EP0687803A1 EP95304051A EP95304051A EP0687803A1 EP 0687803 A1 EP0687803 A1 EP 0687803A1 EP 95304051 A EP95304051 A EP 95304051A EP 95304051 A EP95304051 A EP 95304051A EP 0687803 A1 EP0687803 A1 EP 0687803A1
Authority
EP
European Patent Office
Prior art keywords
pick
attack
box
shank
picks
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.)
Withdrawn
Application number
EP95304051A
Other languages
English (en)
French (fr)
Inventor
Alexander Brian Graham
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.)
Sandvik Rock Tools Ltd
Original Assignee
Sandvik Rock Tools 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 Sandvik Rock Tools Ltd filed Critical Sandvik Rock Tools Ltd
Publication of EP0687803A1 publication Critical patent/EP0687803A1/de
Withdrawn legal-status Critical Current

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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
    • E21C35/19—Means for fixing picks or holders

Definitions

  • This invention relates to tooling, to be used on cutter drums or chain cutters for example, for mineral cutting, which may include such applications as mining, earth and rock cutting and trenching.
  • Drum or chain cutters carry a large number of cutter picks which are held replaceably in pick boxes on the machine.
  • these picks fall into three general types known as radial attack, forward attack and point attack picks.
  • a radial attack pick projects generally perpendicular to the direction of advance and is suitable for use in softer conditions but the pick shank is subject to large bending moments.
  • the forward attack pick has its shank inclined forwards in the direction of advance to avoid this weakness.
  • the point attack pick unlike the first two types, is rotatable in the pick box; it also projects forwards of the pick box and is more effective in harder cutting conditions.
  • GB 2207691A illustrates a radial attack pick box provided with a two-part pick carrying a point attack head that can be used in place of a radial attack pick. This avoids the need to change the drum or chain, but lengthy resetting of the machine is still necessary. In other respects the effort required to make the changeover is not reduced. This known arrangement also leaves the problem that substantial bending loads imposed at the transition between the radial pick shank received in the pick box and the forwardly angled outer portion of the pick limits the conditions in which the advantages of the point attack configuration can be used.
  • a combination of a forward attack pick box and pick with a two-part point attack pick comprising an adaptor part fitting said pick box and having a socket in its forward end to receive a cutter part having a point attack head and a shank locatable rotatably in the socket, the radial projection distance of said point attack head when assembled in the pick box being substantially the same as that of the head of the forward attack pick.
  • Such an arrangement can produce substantial savings of time when it is required to change over a cutting machine from one type of pick to the other. It is merely necessary to remove one set of picks, whether the forward attack type or point attack type, and insert the other set of picks. No resetting is needed because the replacement picks are then at the correct position in the cutting machine to resume the cut that may have been interrupted to make the changeover.
  • the box has a tapering circular cross-section opening for the shank of either form of pick and locking means to hold the pick in the box.
  • the socket of the point attack adaptor part terminates outwardly of a shoulder portion of said part adapted to bear against the exterior of the pick box.
  • the invention also includes a two-part point attack pick for use with a forward attack pick box.
  • the forward attack pick 2 of Figs. 1 and 2 comprises a body 4 having a cutting tip 6 brazed into its forward end and at its rear a conically tapered shank 8 to be received in a pick box 18 (Fig. 3) having a complementary taper bore and terminating at a shoulder portion 10 which lies close to the outer face of the pick box.
  • the outer tip of the pick terminates close to the central axis of the shank 8.
  • the shoulder portion 10 is adapted to seat in a recess on the exterior of the pick box which holds the pick non-rotatably.
  • a spur 14 is spaced from the pick box to provide a purchase for levering the pick from the box.
  • the pick box will be so arranged on the cutting machine that the front face 16 of the insert is substantially perpendicular to its direction of advance.
  • an adaptor part 22 has an identical conically tapered shank 24, with recess 12, and shoulder portion 26 to the corresponding parts 8,10 of the forward attack pick 2 but the portion 28 of the adaptor projecting forwards of the shoulder portion 26 has a cylindrical cross-section.
  • a central circular bore 30 in the front of the adaptor part 22 forms a socket receiving the cutter part 32 of the pick, the shank which is provided with a spring clip 34 to hold it in place in the adaptor part while allowing it to rotate in known manner.
  • a cross-bore 36 in the adaptor part allows a drift (not shown) to be inserted to release the cutter part.
  • the locking device engaging with the recess 12 in either tool 2 or 20 draws the tool into the pick box 18 and the shoulder portion 10 or 26 close to the front face of the box in a conventional manner.
  • the two tools illustrated have an identical length L from a location datum D on the conically tapered shank to the tip of the tool, although they have very different forms of these regions forward of the shank.
  • the location datum D represents the outer end of the pick box bore and is shown slightly spaced from the shoulder 10 or 26 so as to allow some wear to occur the pick box bore without affecting the fit of the tapered shank in it.

Landscapes

  • 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)
EP95304051A 1994-06-16 1995-06-13 Mineralschneidmeissel Withdrawn EP0687803A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB9412114 1994-06-16
GB9412114A GB9412114D0 (en) 1994-06-16 1994-06-16 Cutter picks

Publications (1)

Publication Number Publication Date
EP0687803A1 true EP0687803A1 (de) 1995-12-20

Family

ID=10756852

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95304051A Withdrawn EP0687803A1 (de) 1994-06-16 1995-06-13 Mineralschneidmeissel

Country Status (3)

Country Link
EP (1) EP0687803A1 (de)
GB (2) GB9412114D0 (de)
HK (1) HK1005209A1 (de)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016123367A1 (en) * 2015-01-28 2016-08-04 Esco Corporation Mineral winning pick, holder, and combination

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB201113591D0 (en) 2011-08-08 2011-09-21 Hydra Mining Tools Internat Ltd Mineral cutter tool

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3519309A (en) * 1965-08-12 1970-07-07 Kennametal Inc Rotary cone bit retained by captive keeper ring
US4084856A (en) * 1976-02-09 1978-04-18 Fansteel Inc. Self-retaining sleeve and bit
DE2938453A1 (de) * 1979-09-22 1981-04-02 Wallram Hartmetall Gmbh, 4300 Essen Werkzeugsatz mit befestigungseinrichtung fuer schraemeinrichtungen
GB2111558A (en) * 1981-11-24 1983-07-06 Cincinnati Mine Machinery Co Puk-holder assemblies
GB2129853A (en) * 1982-11-08 1984-05-23 Wimet Mining Limited Cutter picks and pick mounting arrangements
GB2207691A (en) 1987-07-20 1989-02-08 Sandvik Rock Tools Ltd Cutter picks
DE3815249A1 (de) * 1988-04-16 1989-10-26 Komotzki Michael Fa Halterung fuer meissel fuer maschinen zum abtragen von gesteinen und mineralien
GB2223045A (en) * 1988-09-07 1990-03-28 Sandvik Australia Pty Ltd Tool holder

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4302055A (en) * 1978-02-27 1981-11-24 Sandvik Aktiebolag Wedgingly mounted tool holder or adapter for a cutting head

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3519309A (en) * 1965-08-12 1970-07-07 Kennametal Inc Rotary cone bit retained by captive keeper ring
US4084856A (en) * 1976-02-09 1978-04-18 Fansteel Inc. Self-retaining sleeve and bit
DE2938453A1 (de) * 1979-09-22 1981-04-02 Wallram Hartmetall Gmbh, 4300 Essen Werkzeugsatz mit befestigungseinrichtung fuer schraemeinrichtungen
GB2111558A (en) * 1981-11-24 1983-07-06 Cincinnati Mine Machinery Co Puk-holder assemblies
GB2129853A (en) * 1982-11-08 1984-05-23 Wimet Mining Limited Cutter picks and pick mounting arrangements
GB2207691A (en) 1987-07-20 1989-02-08 Sandvik Rock Tools Ltd Cutter picks
DE3815249A1 (de) * 1988-04-16 1989-10-26 Komotzki Michael Fa Halterung fuer meissel fuer maschinen zum abtragen von gesteinen und mineralien
GB2223045A (en) * 1988-09-07 1990-03-28 Sandvik Australia Pty Ltd Tool holder

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016123367A1 (en) * 2015-01-28 2016-08-04 Esco Corporation Mineral winning pick, holder, and combination
US10458234B2 (en) 2015-01-28 2019-10-29 Esco Group Llc Mineral winning pick, holder, and combination
EA039451B1 (ru) * 2015-01-28 2022-01-28 ЭСКО ГРУП ЛЛСи Зубок и держатель резца для добычи полезных ископаемых и их комбинация

Also Published As

Publication number Publication date
GB2290324B (en) 1997-11-26
GB9512042D0 (en) 1995-08-09
HK1005209A1 (en) 1998-12-24
GB9412114D0 (en) 1994-08-03
GB2290324A (en) 1995-12-20

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