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WO2003006165A1 - Ensemble capuchon - Google Patents

Ensemble capuchon

Info

Publication number
WO2003006165A1
WO2003006165A1 PCT/GB2002/003224 GB0203224W WO03006165A1 WO 2003006165 A1 WO2003006165 A1 WO 2003006165A1 GB 0203224 W GB0203224 W GB 0203224W WO 03006165 A1 WO03006165 A1 WO 03006165A1
Authority
WO
WIPO (PCT)
Prior art keywords
frusto
tooth cap
conical portion
pick
cap assembly
Prior art date
Application number
PCT/GB2002/003224
Other languages
English (en)
Inventor
Alan Potts
Original Assignee
Mmd Design & Consultancy Limited
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
Priority claimed from GB0117024A external-priority patent/GB0117024D0/en
Application filed by Mmd Design & Consultancy Limited filed Critical Mmd Design & Consultancy Limited
Publication of WO2003006165A1 publication Critical patent/WO2003006165A1/fr

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B02—CRUSHING, PULVERISING, OR DISINTEGRATING; PREPARATORY TREATMENT OF GRAIN FOR MILLING
    • B02C—CRUSHING, PULVERISING, OR DISINTEGRATING IN GENERAL; MILLING GRAIN
    • B02C13/00—Disintegrating by mills having rotary beater elements ; Hammer mills
    • B02C13/26—Details
    • B02C13/28—Shape or construction of beater elements
    • B02C13/2804—Shape or construction of beater elements the beater elements being rigidly connected to the rotor
    • 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
    • E21C35/188—Mining picks; Holders therefor characterised by adaptations to use an extraction tool
    • 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
    • E21C35/191—Means for fixing picks or holders for fixing holders
    • 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
    • E21C35/193—Means for fixing picks or holders using bolts as main fixing elements

Definitions

  • the present invention relates to a tooth cap assembly for use in a mineral processing machine.
  • the invention relates to a tooth cap assembly having a mineral breaking pick for use in a mineral breaker having a pair of counter-rotating breaker drums of the type described in our European Patent No. 0 167 178.
  • Mineral breaking picks are commonly used in mineral processing machinery which are used for breaking mineral; this may be for the purpose of winning mineral from mineral deposits or for the purpose of breaking down lumps of mineral after mining.
  • picks need to be firmly anchored in a supporting body so that in use the pick is rigidly held in the supporting body without movement.
  • picks should be readily replaceable in order to enable new picks to be fitted once old picks have worn.
  • a general aim of the present invention is to provide a tooth cap assembly including a mineral breaking pick in which the pick is capable of being rigidly held in a supporting cap body without movement and yet, after use, is easy to replace.
  • a mineral breaker tooth cap assembly comprising a tooth cap and a mineral breaking pick detachably mounted in the cap, the cap being adapted to be detachably mounted on a radially projecting mounting boss of a mineral breaker dram, the pick comprising an elongate body having at one axial end a mineral breaking pick head and at the opposite axial end tensile generating means, the elongate body further comprising a frusto-conical portion which tapers inwardly from the pick head end of the body toward the tensile generating means of the body, said frusto-conical portion defining an abutment surface for abutment with a frusto-conical seat located in said tooth cap, the frusto-conical portion having an angle of taper which defines a shedding taper, said frusto-conical seat being of complementary shape and size to said frusto-conical portion of the elongate body, said frust
  • a mineral processing machine preferably a mineral breaker, including a tooth cap assembly as defined above.
  • Figure 2 is an end view of a pair of breakers drums of a mineral breaker incorporating mineral breaker picks as shown in Figure 1 ;
  • Figure 3 is a plan view of a further embodiment of a tooth pick and support according to the present invention.
  • Figure 4 is a side view of the further embodiment shown in Figure 3;
  • Figure 5 is a front view of the further embodiment shown in Figure 3;
  • Figure 6 is an exploded perspective view of the support of the further embodiment and the mounting boss to which it is secured;
  • Figure 7 is an underside perspective view of the support of the further embodiment shown in Figure 3.
  • FIG. 1 there is shown a mineral breaker tooth cap 20 of the type described in our UK Patent No. 2 176 424. Reference is made to UK Patent No. 2 170 424 for a detailed description of cap 20 and the manner by which it is mounted.
  • the tooth cap 20 defines a supporting body for a mineral breaking pick 50; the tooth cap 20 and pick 50 in combination define a mineral breaker tooth cap assembly according to the present invention.
  • the pick 50 comprises an elongate body 51 formed from a suitable metal such as a heat hardenable steel such as a grade EN24 steel.
  • the body 51 is initially formed by forging and then machined to accurate shape and dimensions.
  • the elongate body 51 has at one axial end a conical pick head 52 and at its opposite axial end a tensile generating means 55.
  • the elongate body 51 includes a frusto-conical portion 56 which tapers inwardly from the pick head toward the tensile generating means end of the elongate body 51.
  • the frusto-conical portion 56 has a taper angle ⁇ which is chosen to define a shedding angle.
  • 'shedding angle' means an angle of taper which does not impede axial separation of the frusto-conical portion from the supporting body; in other words a shedding angle is greater than an angle of taper which would provide an axial wedging or locking effect.
  • a wedging taper angle is of the order of 1.5°.
  • the taper angle is about 15° but it will be appreciated that the taper angle may be greater or less than 15°, provided that it defines a shedding taper.
  • the frusto-conical portion 56 has a maximum diameter end which is of substantially the same diameter as the maximum diameter of the conical pick head 52. Accordingly, there is a gradual transition in shape and size between the conical head 52 and the frusto- conical portion 56. This enables the head only to be heat treated to increase its surface hardness without creating a potential shear fracture region between the frusto-conical portion 56 and the head 52. Accordingly, it is possible for the head 52 to be treated so as to have a hard exterior and yet have a relatively softer more resilient interior whilst the remainder of the elongate body retains its resilient character throughout.
  • the pick body is received in a bore 60 formed in the cap 20; the bore 60 having a frusto-conical portion 61.
  • the frusto-conical bore portion 61 defines a seat against which the frusto-conical portion 56 is held in face to face abutment by the tensile generating means 55.
  • the pick body In view of the abutment between the frusto-conical portion 56 and the seat defined by bore portion 61, the pick body is prevented from moving laterally relative to its axis and so is able to positively withstand side loadings applied by the pick head 52 during use.
  • the pick body is rigidly held within the cap 20 without lateral movement as long as the tensile loading applied by the tensile generating means 55 maintains abutment between the frusto-conical portion 56 and the seat defined by bore portion 61.
  • the length / of the frusto-conical portion 56 is relatively long and so provides a relatively large surface area for dissipating side loadings applied by the pick head 52. It will be appreciated that the length may be varied by choosing a different taper angle (whilst maintaining substantially the same maximum diameter). Thus, for example, as shown by broken lines in Figure 1, the frusto-conical portion 56 may have a length /' which extends for substantially the entire length of bore 60.
  • the length / of the frusto-conical portion is chosen to be greater than about half the axial length / H of the head 52.
  • the frusto-conical portion 56 also acts to prevent axial movement of the pick body within the bore 60 in a direction towards its tensile generating means end.
  • the tensile loading applied by the tensile generating means 55 is accommodated by abutment between the frusto-conical portion56 and the seat defined by bore portion 61.
  • the pick head 52 may have a larger diameter than the maximum diameter of the frusto-conical portion 56 and thereby defines a shallow shoulder 70.
  • a gap G is formed between the shoulder 70 and the cap 20 in order to ensure that the tensile loadings applied by the tensile generating means 55 are accommodated by abutment between the frusto-conical portion 56 and the seat defined by bore portion 61 and not by the shoulder 70 engaging the cap 20.
  • the tensile generating means 55 comprise a screw threaded nut 80 which is threadably received on a screw threaded portion 81 of the elongate body 51
  • the amount of tensile loading applied on the elongate body 51 in between the tensile generating means 55 and the frusto-conical portion 56 is chosen to be in excess of a predetermined maximum loading which the pick head 52 is capable of applying to the elongate body by loads applied to the tip T of the head 52 during use. In this way, even if the head 52 applies its predetermined maximum loading, the elongate body in between the tensile generating means 55 and the frusto-conical portion 56 remains under a tensile loading and so prevents release of the tensile generating means 55.
  • the cap 20 is mounted on annulus or ring
  • the bosses 26 each extend along a radial line R B .
  • each drum 101, 102 comprises a series of annuli 25 axially spaced along a shaft 103 such that the caps 20 are preferably arranged in helical formation as described in our European Patents Nos 0 096 706 and 0 167 178 to which reference should be made for a fuller description.
  • the bore 60 extends axially from a leading face 21 of cap 20 toward a trailing face 22.
  • the terms 'leading' and 'trailing' are used with reference to the direction of rotation A.
  • the pick body is located almost entirely on the leading side of the radial line R B and preferably the axis of bore 60 subtends an acute angle ⁇ with radial line R B .
  • the initial bite region B between a pair of opposed picks direct a majority of forces along the axis of each pick and thereby reduce side loadings in the initial bite region B.
  • a further embodiment 100 is illustrated in Figures 3 to 7. Parts similar to those in the embodiment shown in Figures 1 and 2 have been designated using the same reference numerals.
  • the pick 50 is provided with anti- rotation means 150 which serve to prevent the pick 50 rotating within bore 60. This helps to ensure that during use the pick 50 does not rotate and possibly cause loosening of the tensile generating means 55. >
  • the anti-rotation means 150 comprises one or more lugs 151 projecting from the leading face 21 of the support body and a corresponding number of recesses 152 formed in the pick head 52 which receive the lugs 151.
  • anti-rotation means 150 may be provided in the embodiment of Figures 1 and 2.
  • the support body of embodiment 100 preferably comprises a cap 120 in the form of a cast body defining a pocket 200 in which an associated mounting boss 26 is seated.
  • the pocket 200 has a leading wall 201, a trailing wall 202, a pair of opposed side walls 203 and an upper wall 204.
  • Each side wall 203 is provided with a slot 208 in order to enable the leading and trailing walls 201, 202 respectively to be moved toward one another on tightening of bolt 27 which is responsible for securing the cap 120 to the mounting boss 26. In this way, tightening of the bolt 27 causes the leading and trailing walls 201, 202 to clamp against the opposed faces of the boss 26.
  • the side walls 203 are provided with apertures 210 communicating with the faces of leading and trailing walls 201, 202 respectively in order to enable feeler gauges to be inserted during the assembly procedure and thereby enable an operative to check that the faces of the leading and trailing walls 201, 202 respectively are clamped against the opposed faces of the boss 26.
  • each slot 208 is 'T' shaped.
  • the head part of the slot extends for the entire space between the leading and trailing walls 201, 202 and is preferably located so as to border the upper wall 204. This enables the leading and trailing walls 201, 202 to be flexed toward one another with minimum effort on tightening of bolt 27.
  • the cap 120 is provided with protection wear plates 125 mounted on its outer leading face 21, outer top face 23 and outer trailing faces 22 respectively.
  • each wear plate 125 is secured in place by welding.
  • the cast body of cap 120 has chamfered edges 128 which underlie the respective wear plate 125 and thereby enable a line of welding to be made which underlies the wear plate 125 and so is protected thereby during use.
  • each wear plate 125 is planar and so is of sheet-like form and so can be conveniently produced.
  • caps 20,120 are examples of a support body for picks 50 according to the present invention and that support bodies from other types of mineral processing machines may be adapted to receive picks 50.

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)
  • Food Science & Technology (AREA)
  • Drilling And Exploitation, And Mining Machines And Methods (AREA)

Abstract

Ensemble capuchon (20) de broyeur de minéraux comprenant un capuchon (20), et un pic (50) broyeur de minéraux monté détachable dans le capuchon. Le capuchon est conçu pour être monté détachable sur une protubérance (26) radiale de montage d'un tambour de broyeur de minéraux, le pic comportant un corps (51) allongé qui présente à une extrémité axiale une tête (52) de pic de broyeur de minéraux ; et à l'extrémité axiale opposée des moyens (55) produisant une traction. Le corps allongé comporte de plus une partie tronconique (56) qui diminue vers l'intérieur, depuis l'extrémité de tête du pic vers les moyens (55) produisant une traction. La partie tronconique définit une surface de butée sur laquelle vient buter un siège tronconique (61) situé dans le capuchon. La partie tronconique présente un angle (α) qui définit une diminution progressive, le siège tronconique étant de forme et de taille complémentaires à la partie tronconique du corps allongé. Le siège et la partie tronconiques sont en contact face à face et maintenus l'un contre l'autre par les moyens produisant une traction ; les positions axiales du siège et de la partie tronconiques l'un par rapport à l'autre sont telles que la tête de pic est espacée axialement du capuchon afin d'isoler la tête de pic des charges de traction appliquées par les moyens produisant une traction.
PCT/GB2002/003224 2001-07-12 2002-07-12 Ensemble capuchon WO2003006165A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
GB0117024.0 2001-07-12
GB0117024A GB0117024D0 (en) 2001-07-12 2001-07-12 A pick
GB0210172.3 2002-05-03
GB0210172A GB0210172D0 (en) 2001-07-12 2002-05-03 A pick

Publications (1)

Publication Number Publication Date
WO2003006165A1 true WO2003006165A1 (fr) 2003-01-23

Family

ID=26246303

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2002/003224 WO2003006165A1 (fr) 2001-07-12 2002-07-12 Ensemble capuchon

Country Status (1)

Country Link
WO (1) WO2003006165A1 (fr)

Cited By (18)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005046875A1 (fr) * 2003-11-08 2005-05-26 Mmd Design & Consultancy Limited Structure dentee pour broyeuse de mineraux
WO2005075083A1 (fr) * 2004-02-09 2005-08-18 Johann Doppstadt Porte-lames destine a des dispositifs de broyage
WO2008079005A3 (fr) * 2006-12-27 2008-10-02 Caterpillar Work Tools Bv Outil de travail comportant une dent libérable
US7556715B2 (en) 2004-01-09 2009-07-07 Suncor Energy, Inc. Bituminous froth inline steam injection processing
US7651042B2 (en) 2005-11-09 2010-01-26 Suncor Energy Inc. Method and apparatus for creating a slurry
WO2010094951A3 (fr) * 2009-02-19 2010-12-16 Mmd Design & Consultancy Limited Structure dentée
US8328126B2 (en) 2008-09-18 2012-12-11 Suncor Energy, Inc. Method and apparatus for processing an ore feed
US8393561B2 (en) 2005-11-09 2013-03-12 Suncor Energy Inc. Method and apparatus for creating a slurry
EP2620218A1 (fr) * 2012-10-25 2013-07-31 HAZEMAG & EPR GmbH Anneau broyeur d'un cylindre broyeur
US8851293B2 (en) 2004-07-30 2014-10-07 Suncor Energy, Inc. Sizing roller screen ore processing apparatus
WO2014170371A3 (fr) * 2013-04-19 2015-04-16 Takraf Gmbh Cylindre broyeur pour broyeur à cylindre
US9016799B2 (en) 2005-11-09 2015-04-28 Suncor Energy, Inc. Mobile oil sands mining system
WO2016001684A1 (fr) * 2014-07-04 2016-01-07 Mmd Design & Consultancy Limited Dent de concasseur et ensemble tambour pour concasseur de minéraux
EP2626508A3 (fr) * 2012-02-13 2016-02-24 Everpads Co., Ltd. Dispositif de maintien d'outil de coupe
DE102014016500A1 (de) * 2014-11-07 2016-05-12 Bomag Gmbh Werkzeugeinrichtung für eine Bodenfräsmaschine und Bodenfräsmaschine mit einer solchen Werkzeugeinrichtung
CN109622137A (zh) * 2019-02-19 2019-04-16 焦作市双力机械有限公司 一种双齿辊式强力破碎机齿辊结构
US10875027B2 (en) 2015-10-02 2020-12-29 Mmd Design & Consultancy Limited Sizer tooth
GB202107129D0 (en) 2021-05-19 2021-06-30 Mmd Group Ltd Tooth and tooth pick formation

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4299424A (en) * 1979-12-03 1981-11-10 National Mine Service Company Cutting tool assembly
EP0114725A2 (fr) * 1983-01-20 1984-08-01 Mmd Design And Consultancy Limited Broyeur de minerai
GB2185766A (en) * 1983-12-14 1987-07-29 Joy Mfg Co A bit holder
US5332164A (en) * 1990-12-31 1994-07-26 Rexworks, Inc. Materials grinder

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4299424A (en) * 1979-12-03 1981-11-10 National Mine Service Company Cutting tool assembly
EP0114725A2 (fr) * 1983-01-20 1984-08-01 Mmd Design And Consultancy Limited Broyeur de minerai
GB2185766A (en) * 1983-12-14 1987-07-29 Joy Mfg Co A bit holder
US5332164A (en) * 1990-12-31 1994-07-26 Rexworks, Inc. Materials grinder

Cited By (34)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005046875A1 (fr) * 2003-11-08 2005-05-26 Mmd Design & Consultancy Limited Structure dentee pour broyeuse de mineraux
US7377459B2 (en) 2003-11-08 2008-05-27 Nmd Design & Consultancy Limited Tooth construction for a mineral breaker
AP2053A (en) * 2003-11-08 2009-10-05 Mmd Design & Consult A tooth construction for a mineral breaker
RU2378054C2 (ru) * 2003-11-08 2010-01-10 Ммд Дизайн Энд Консалтанси Лимитед Конструкция зуба для минералодробилки
US7556715B2 (en) 2004-01-09 2009-07-07 Suncor Energy, Inc. Bituminous froth inline steam injection processing
WO2005075083A1 (fr) * 2004-02-09 2005-08-18 Johann Doppstadt Porte-lames destine a des dispositifs de broyage
US8851293B2 (en) 2004-07-30 2014-10-07 Suncor Energy, Inc. Sizing roller screen ore processing apparatus
US9016799B2 (en) 2005-11-09 2015-04-28 Suncor Energy, Inc. Mobile oil sands mining system
US7651042B2 (en) 2005-11-09 2010-01-26 Suncor Energy Inc. Method and apparatus for creating a slurry
US8393561B2 (en) 2005-11-09 2013-03-12 Suncor Energy Inc. Method and apparatus for creating a slurry
WO2008079005A3 (fr) * 2006-12-27 2008-10-02 Caterpillar Work Tools Bv Outil de travail comportant une dent libérable
US8622326B2 (en) 2008-09-18 2014-01-07 Suncor Energy, Inc. Method and apparatus for processing an ore feed
US8328126B2 (en) 2008-09-18 2012-12-11 Suncor Energy, Inc. Method and apparatus for processing an ore feed
WO2010094951A3 (fr) * 2009-02-19 2010-12-16 Mmd Design & Consultancy Limited Structure dentée
CN102325599A (zh) * 2009-02-19 2012-01-18 Mmd设计及顾问有限公司 齿结构
US8814073B2 (en) 2009-02-19 2014-08-26 Mmd Design & Consultancy Limited Tooth construction
EP2626508A3 (fr) * 2012-02-13 2016-02-24 Everpads Co., Ltd. Dispositif de maintien d'outil de coupe
US9468928B2 (en) 2012-10-25 2016-10-18 Hazemag & Epr Gmbh Crushing ring of a crushing roll
CN103769268A (zh) * 2012-10-25 2014-05-07 德国哈斯玛克公司 破碎辊的破碎环
AU2013245577B2 (en) * 2012-10-25 2015-08-20 Hazemag & Epr Gmbh Crushing ring of a crushing roll
EP2620218A1 (fr) * 2012-10-25 2013-07-31 HAZEMAG & EPR GmbH Anneau broyeur d'un cylindre broyeur
CN105228751A (zh) * 2013-04-19 2016-01-06 塔克拉夫有限公司 用于辊式破碎机的破碎辊子
WO2014170371A3 (fr) * 2013-04-19 2015-04-16 Takraf Gmbh Cylindre broyeur pour broyeur à cylindre
AU2015282422B2 (en) * 2014-07-04 2019-08-15 Mmd Design & Consultancy Limited Breaker tooth and drum assembly for a mineral breaker
CN106470762A (zh) * 2014-07-04 2017-03-01 Mmd设计及顾问有限公司 用于矿物破碎机的破碎机齿和鼓组件
RU2649603C1 (ru) * 2014-07-04 2018-04-04 Ммд Дизайн Энд Консалтэнси Лимитед Зуб дробилки и барабанное устройство для минералодробилки
WO2016001684A1 (fr) * 2014-07-04 2016-01-07 Mmd Design & Consultancy Limited Dent de concasseur et ensemble tambour pour concasseur de minéraux
DE102014016500A1 (de) * 2014-11-07 2016-05-12 Bomag Gmbh Werkzeugeinrichtung für eine Bodenfräsmaschine und Bodenfräsmaschine mit einer solchen Werkzeugeinrichtung
US20170321551A1 (en) * 2014-11-07 2017-11-09 Bomag Gmbh Tool device for a ground milling machine and ground milling machine having such a tool device
US10018041B2 (en) 2014-11-07 2018-07-10 Bomag Gmbh Tool device for a ground milling machine and ground milling machine having such a tool device
US10875027B2 (en) 2015-10-02 2020-12-29 Mmd Design & Consultancy Limited Sizer tooth
CN109622137A (zh) * 2019-02-19 2019-04-16 焦作市双力机械有限公司 一种双齿辊式强力破碎机齿辊结构
GB202107129D0 (en) 2021-05-19 2021-06-30 Mmd Group Ltd Tooth and tooth pick formation
WO2022243680A1 (fr) 2021-05-19 2022-11-24 MMD Group Limited Formation de dents et formation de pics de dents

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