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WO2003001031A1 - Tete porte-outil et outil de sous-cavage - Google Patents

Tete porte-outil et outil de sous-cavage Download PDF

Info

Publication number
WO2003001031A1
WO2003001031A1 PCT/SE2002/001211 SE0201211W WO03001031A1 WO 2003001031 A1 WO2003001031 A1 WO 2003001031A1 SE 0201211 W SE0201211 W SE 0201211W WO 03001031 A1 WO03001031 A1 WO 03001031A1
Authority
WO
WIPO (PCT)
Prior art keywords
tool
holder
roller cutter
attachment
plane parallel
Prior art date
Application number
PCT/SE2002/001211
Other languages
English (en)
Inventor
Peter Nava
Original Assignee
Sandvik Ab; (Publ)
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 Ab; (Publ) filed Critical Sandvik Ab; (Publ)
Publication of WO2003001031A1 publication Critical patent/WO2003001031A1/fr

Links

Classifications

    • 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

  • the present invention relates to a tool head and a tool for mining of rock material according to the preambles of each of the appended independent claims.
  • One object of the present invention is to provide a tool head and a tool having the same advantages as known technique. Another object of the present invention is to provide a tool head and a tool with a good stability.
  • Still another object of the present invention is to provide a tool head and a tool with good life spans.
  • Fig. 1A shows a tool according to the present invention in a side view partly in a section.
  • Fig. 1 B shows the tool in an additional partly sectioned side view.
  • Fig. 1C shows the tool in an end view.
  • Fig. 2A shows a tool head according to the present invention in a side view, however with only one tool mounted.
  • Fig. 2B shows the tool head in an end view, however with one empty tool pocket.
  • Fig. 3A shows a plan view of a machine during mining of rock material.
  • Fig. 3B shows the machine in a perspective view.
  • Fig. 1 shows a tool 10 for mining of rock material, preferably by means of undercutting.
  • the tool comprises a rectangular, elongated attachment 11 and a roller cutter 12.
  • the attachment 11 has a substantially parallel-epipedical cross- section and comprises substantially plane parallel lower and upper sides 11 A, 11 B and those connecting substantially plane parallel surfaces, i.e. a support surface 11C and a free surface 11 D, and an end surface 11 E.
  • the lower side 11A and the support surface 11 C form an internal second acute angle ⁇ , which is 70° to 85°.
  • a bearing journal 13 is integrally formed with the attachment 11 and the roller cutter 12 is mounted on the journal 13.
  • the roller cutter 12 has a number of rock cutting means, preferably in the shape of cemented carbide buttons 14 arranged in a row at a distance from each other in the circumferential direction. Said distance is at least twice the size of the button 14 diameter.
  • cemented carbide is meant a metal carbide, such as tungsten carbide or similar, sintered together with a binder, such as cobalt or nickel.
  • a number of bearing arrangements are formed between the roller cutter 12 and the journal 13, whereby the roller cutter 12 is symmetrical and rotatable relative to the journal 13 around an axis of rotation CL.
  • a radial base bearing is provided in connection with the open end of the roller cutter 12, and said radial base bearing comprises a number of cylindrical first rolling elements 15, which cooperate partly with a first bearing race 16 on the journal and partly with a second bearing race 17 at the inside of the roller cutter 12 in connection with the open end.
  • a radial top bearing is provided closer to a free end of the journal 13 than the base bearing, and said top bearing likewise comprises a number of cylindrical second rolling elements 18, which normally have a smaller diameter than the rolling elements 15 of the base bearing and partly cooperates with a third bearing race 19 on the journal 13, partly with a fourth bearing race 20 at the inside of the roller cutter 12.
  • a first and a second support disc 21 and 22, respectively, are formed as a first axial bearing provided at the area of the forward free end of the journal 13.
  • the first support disc 21 is received by a first recess in the roller cutter 12, and said first support disc 21 is striated along its circumference for a safer attachment to said first recess.
  • the material in the first support disc 21 is preferably high-speed steel.
  • the second support disc 22 is received by a second recess at the free end of the journal 13, and the second recess is usually circular while the second support disc 22 is hexagonal or octagonal, whereby the second support disc 22 is prevented from rotating relative to the journal 13.
  • the material in the second support disc 22 is preferably cemented carbide.
  • a system of roller bearings 23 is provided between the base bearing and the top bearing.
  • a channel 25 for the insertion of roller bearing balls is provided in the bearing journal 13, in which a plug 24 is received such to retain the separate balls.
  • the cylinder roller bearing 15 receives a major part of the force of reaction from the rock while the principal task of the roller bearing 23 is to retain the roller cutter 12 on the journal 13.
  • the roller cutter has shoulders 26 and 28 to be brought against collars 27 and 29, respectively, on the journal for receiving axial forces, which are not received by the cooperation of the support disc 21 with the support disc 22 of the journal.
  • the shoulders and collars 26-29 form right angles with the rotational axis CL.
  • the collar 29 is provided on a cylindrical base 36 connected to the attachment 11.
  • the shoulder 28 forms together with the collar 29 a first protection against entrance of rock dust.
  • An O-ring 34 is inserted in a cavity between said first protection and said first roller bearings 15 as a second protection against entrance of rock dust.
  • the above-captioned bearings may be lubricated by means of a lubricating system integrated with the tool 10.
  • a slide bearing can be provided at the substantially corresponding position according to Fig. 1 A instead of the roller bearing 18.
  • the base 36 transitions into the attachment 11 via a stop surface 50.
  • the stop surface 50 has a greater radial extension than the attachment 11 and is plane parallel with a plane P defined below.
  • the buttons 14 of cemented carbide are secured along a circumferential protrusion 30 on the roller cutter 12.
  • the centeriine CL2 of each of button forms a third acute angle ⁇ with the axis of rotation CL of the roller cutter.
  • the angle ⁇ is 60 to 80°, preferably about 75°.
  • All buttons intersect a plane P.
  • the plane P is provided axially beyond the closest bearing 21 , 22.
  • the roller cutter 12 comprises a substantially planar end surface 31 , which is parallel with the plane P and which connects to a substantially conical peripheral surface 32.
  • the planar end surface is massive, which means that dust cannot enter into the bearings that way.
  • the peripheral surface 32 comprises holes which hold buttons 14.
  • the peripheral surface further connects to an axially rearwardly tapering surface 33, which has a breaking function in tough minerals.
  • the surface 33 may include wear protection in the shape of a hard-facing deposit or a number of cemented carbide buttons 35.
  • the surface 33 further connects to a cylindrical envelope surface of the roller cutter 12. Said envelope surface lies substantially in the same imaginary cylinder as the envelope surface of the cylindrical base 36.
  • the attachment 11 has four through-going, un-threaded, holes 37 or means for clamping.
  • the centeriine CL5 of each hole forms a fourth acute angle ⁇ with a normal to the lower side 11 A, when the tool is seen in the end view of Fig. 2B.
  • the centeriine CL5 of each hole forms a sixth acute angle ⁇ with the lower side 11 A, when the tool is seen in the side view of Fig. 1A.
  • the holes are intended to receive threaded screws 54 for clamping to a holder 38.
  • the holder 38 has a polygonal, preferably hexagonal, basic shape. Only one of four possible screws 54 is shown in Fig. 2A.
  • the holder 38 has an axis of rotation CL3 as well as a number, preferably six, of recesses tool pockets 39 adapted to receive the attachments 11.
  • the recesses 39 are open outwards in the radial and axial directions of the attachment and are spread with 60° partition.
  • Each recess 39 forms a substantially parallel-epipedical space and comprises a planar bottom surface 39A and a support surface 39C plane parallel with a free surface 39D.
  • the bottom surface 39A and the support surface 39C form an internal fifth acute angle ⁇ , which is 70° to 85°, see Fig. 2B.
  • the angle ⁇ is substantially as large as the above-mentioned angle ⁇ or preferably some degrees smaller for abutment of the support surfaces 11C and 39C radially far out.
  • each recess 39 is essentially planar and parallel with the rotational axis CL3 and comprises four threaded blind holes 41.
  • the center line CL4 of each hole 41 forms just like the hole 37 a fourth acute angle ⁇ with a normal N to the bottom surface 39A. Said normal N is chosen in Fig. 2B such that it intersects the rotational axis CL3.
  • the holder 38 has a center hole 42 intended to be positively clamped to a machine driven shaft via for example a splines joint such to be rotated during operation.
  • the axis CL of rotation of the roller cutter form an acute angle with the rotational axis CL3, which angle is chosen in the range of 1 to 30°, preferably 5 to 15°. Said angle is obtained most simply by inclining the bottom
  • the holder 38 has a front side 51 facing towards the roller cutter 12 and a rear side 52 facing away from the roller cutter.
  • the front side 51 comprises a substantially planar stop surface 53 substantially plane parallel with the plane P and provided to abut against the stop surface 50 of the roller cutter 12 at mounting.
  • the tool 0 is mounted to the holder 38 by positioning the attachment 11 in the recess 39 such that the four oblique holes 37 of the attachment align with the four oblique threaded holes 41 in the recess bottom 39A.
  • the screws are inserted through the holes 37 and are screwn into the holes 41.
  • the tool 10 will be drawn during screwing against the holder 38 at a first acute angle, about 45° relative to the front side 51 of the holder and relative to the rotational axis of the roller cutter, according to the direction of the arrow B in Fig. 2A, i.e. obliquely inwardly and downwardly in the recess 39. Said direction intersects both the plane P and the front side 51.
  • the lower side 11 A of the attachment is fixed against the bottom 39A while the support surface 11C of the attachment is pressed against the support surface 39C of the recess 39.
  • the stop surface 50 of the tool 10 can abut against the stop surface 53 of the front surface 51.
  • the stop surfaces 50, 53 define the axial protrusion of the tool 10 from the holder 38.
  • a small gap may remain between the stop surfaces 50, 53 at fully tightened joint.
  • the stop surfaces 50, 53 may function as an axial stop at great loads during mining if the screw joint is deformed preferably elastically. The process is repeated until all recesses comprise a stabily positioned tool.
  • the upper side 11 B of the attachment will then be in position substantially in line with the envelope surface of the holder such to minimize possible impacts against the holder.
  • the tool head that is formed by the holder 38 and the tools 10 is depicted 46.
  • the holder in turn is intended to be mounted to a machine 43, see Figs. 3A and 3B.
  • the machine 43 has an arm 44 pivotable to-and-fro, which is driven via hydraulic means 45.
  • the arm 44 comprises a driven axis, not shown, which is mounted to the hole 42 in the holder.
  • the arm pivots about an axis A such that the tool head 46, the center line of which is provided somewhat in front of the axT-vih the initial position, follows an essentially arcuate path with the radius R during continuous rotation in the direction R1 of the tool head 46.
  • the rotation R2 of the tools 10 become reversed to the rotation R1 of the tool head since the part of each tool periphery which is foremost in the direction of the path machines rock.
  • the machine is foremost intended to machine ore such as platinum ore, where the ore lies in narrow layers in the rock. The height of the machine is therefore adapted not to outreach the biggest diameter of the tool head.
  • buttons are in action simultaneously which gives a high surface pressure on each cemented carbide button in relation to surface pressure on steel discs according to prior art. This gives good penetration for each button and requires less energy simultaneously as the generated dust is not compressed in the formed trail but finds accommodation between the buttons, which entails a good life span for the tool.
  • the momentarily passive tools obtain a clearance relative to the machined surface.
  • the pivoting is stopped and the arm returns to said position.
  • the tool head has cut away material enough such that the machine will be able to advance a further distance in the direction F, for example 6 cm.
  • the machine can be provided with a device so as to shove the loose ore.

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)
  • Earth Drilling (AREA)
  • Drilling And Exploitation, And Mining Machines And Methods (AREA)

Abstract

L'invention concerne une tête porte-outil (46) et un outil (10) servant à creuser un matériau rocheux, notamment au moyen du sous-cavage. La tête porte-outil (46) comprend un support et plusieurs outils (10) disposés à la périphérie du support. Chaque outil (10) comporte un trépan à molettes (12) monté rotatif par l'intermédiaire de paliers sur une fixation. Chaque outil (10) et le support (38) sont pourvus de moyens de retenue (37, 41,54), conçus pour fonctionner dans une direction (B) qui forme un premier angle aigu avec la face frontale (51) du support.
PCT/SE2002/001211 2001-06-21 2002-06-18 Tete porte-outil et outil de sous-cavage WO2003001031A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
SE0102237A SE519284C2 (sv) 2001-06-21 2001-06-21 Verktygshuvud och verktyg
SE0102237-5 2001-06-21

Publications (1)

Publication Number Publication Date
WO2003001031A1 true WO2003001031A1 (fr) 2003-01-03

Family

ID=20284589

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE2002/001211 WO2003001031A1 (fr) 2001-06-21 2002-06-18 Tete porte-outil et outil de sous-cavage

Country Status (3)

Country Link
SE (1) SE519284C2 (fr)
WO (1) WO2003001031A1 (fr)
ZA (1) ZA200309220B (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3392455A1 (fr) * 2017-04-18 2018-10-24 Sandvik Intellectual Property AB Appareil de découpage
EP3464821A4 (fr) * 2016-05-27 2020-04-22 Joy Global Underground Mining LLC Tête de coupe comprenant un disque de coupe segmenté
WO2021058249A1 (fr) * 2019-09-23 2021-04-01 Element Six (Uk) Limited Ensemble de coupe
RU2794114C1 (ru) * 2019-07-31 2023-04-11 Сандвик Майнинг Энд Констракшн Г.М.Б.Х. Режущая головка для выемки твердых горных пород из плоскости забоя и режущее устройство для создания туннеля

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2619338A (en) * 1950-11-03 1952-11-25 Goodman Mfg Co Coal mining machine
DE3905737A1 (de) * 1988-03-01 1989-11-02 Bechem Hannelore Verfahren zum bohren von stollen, tunnel, kavernen und dgl. - u. a. von bogenprofilen - mit gestuft spaltend abtragenden vorzugsweise aktivierten hinterschneidwerkzeugen, die an einem im mittelpunkt in allen richtungen gelenkig und bewegbar angeordneten arm befestigt sind
DE4142800A1 (de) * 1990-12-27 1992-11-12 Bechem Hannelore Hinterschneidend abtragendes rollen- / fraesbohrwerkzeug
US5295735A (en) * 1992-06-10 1994-03-22 Cobbs David C Rock saw

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2619338A (en) * 1950-11-03 1952-11-25 Goodman Mfg Co Coal mining machine
DE3905737A1 (de) * 1988-03-01 1989-11-02 Bechem Hannelore Verfahren zum bohren von stollen, tunnel, kavernen und dgl. - u. a. von bogenprofilen - mit gestuft spaltend abtragenden vorzugsweise aktivierten hinterschneidwerkzeugen, die an einem im mittelpunkt in allen richtungen gelenkig und bewegbar angeordneten arm befestigt sind
DE4142800A1 (de) * 1990-12-27 1992-11-12 Bechem Hannelore Hinterschneidend abtragendes rollen- / fraesbohrwerkzeug
US5295735A (en) * 1992-06-10 1994-03-22 Cobbs David C Rock saw

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10989050B2 (en) 2016-05-27 2021-04-27 Joy Global Underground Mining Llc Cutting head having segmented cutting disc
EP3464821A4 (fr) * 2016-05-27 2020-04-22 Joy Global Underground Mining LLC Tête de coupe comprenant un disque de coupe segmenté
EP3463009A4 (fr) * 2016-05-27 2020-04-22 Joy Global Underground Mining LLC Dispositif de coupe à élément de coupe conique
US10808531B2 (en) 2016-05-27 2020-10-20 Joy Global Underground Mining Llc Cutting device with tapered cutting element
RU2753564C2 (ru) * 2016-05-27 2021-08-17 ДЖОЙ ГЛОБАЛ АНДЕРГРАУНД МАЙНИНГ ЭлЭлСи Режущее устройство с сужающимся режущим элементом
US11499426B2 (en) 2016-05-27 2022-11-15 Joy Global Underground Mining Llc Cutting device with tapered cutting element
EP4234882A3 (fr) * 2016-05-27 2023-09-06 Joy Global Underground Mining LLC Dispositif de coupe à éléments d'usure
EP4421288A3 (fr) * 2016-05-27 2024-11-27 Joy Global Underground Mining LLC Tête de coupe à disque de coupe segmenté
WO2018192765A1 (fr) * 2017-04-18 2018-10-25 Sandvik Intellectual Property Ab Appareil de coupe
EP3392455A1 (fr) * 2017-04-18 2018-10-24 Sandvik Intellectual Property AB Appareil de découpage
US11203931B2 (en) 2017-04-18 2021-12-21 Sandvik Intellectual Property Ab Cutting apparatus
RU2794114C1 (ru) * 2019-07-31 2023-04-11 Сандвик Майнинг Энд Констракшн Г.М.Б.Х. Режущая головка для выемки твердых горных пород из плоскости забоя и режущее устройство для создания туннеля
WO2021058249A1 (fr) * 2019-09-23 2021-04-01 Element Six (Uk) Limited Ensemble de coupe

Also Published As

Publication number Publication date
SE0102237L (sv) 2002-12-22
ZA200309220B (en) 2004-09-16
SE0102237D0 (sv) 2001-06-21
SE519284C2 (sv) 2003-02-11

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