EP0180572A1 - Dispositif pour l'exploitation de roche et pic à queue ronde pour ce dispositif - Google Patents

Dispositif pour l'exploitation de roche et pic à queue ronde pour ce dispositif Download PDF

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Publication number
EP0180572A1
EP0180572A1 EP85890267A EP85890267A EP0180572A1 EP 0180572 A1 EP0180572 A1 EP 0180572A1 EP 85890267 A EP85890267 A EP 85890267A EP 85890267 A EP85890267 A EP 85890267A EP 0180572 A1 EP0180572 A1 EP 0180572A1
Authority
EP
European Patent Office
Prior art keywords
chisel
pick
rock
area
shank
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.)
Granted
Application number
EP85890267A
Other languages
German (de)
English (en)
Other versions
EP0180572B1 (fr
Inventor
Ernst Dr. Brennsteiner
Johann Komaz
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.)
Vereinigte Edelstahlwerke AG
Original Assignee
Vereinigte Edelstahlwerke AG
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 Vereinigte Edelstahlwerke AG filed Critical Vereinigte Edelstahlwerke AG
Publication of EP0180572A1 publication Critical patent/EP0180572A1/fr
Application granted granted Critical
Publication of EP0180572B1 publication Critical patent/EP0180572B1/fr
Expired 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
    • E21C35/187—Mining picks; Holders therefor with arrangement of fluid-spraying nozzles

Definitions

  • cutting machines For large-scale mining of rock, ores or the like, whether for the construction of tunnels, surface or underground mining, cutting machines have proven particularly useful.
  • a large number of chisels are provided on a rotating and pivotable working head. These chisels are arranged in their bit holders in such a way that they rotate when they come into contact with the rock. This rotary movement of the chisel ensures uniform wear thereof, the centered hard metal pin also being subject to uniform abrasion.
  • both the shank of the chisel and the chisel holder are constructed from a material that is correspondingly insensitive to impact, while at the same time high dimensional accuracy and a high resistance to deformation are to be present, that even when the temperature rises, for example due to the frictional heat of the shank Chisel holder, due to additional external heat and the like. No warping or tensioning occurs.
  • the chisel should be constructed in such a way that the cooperation surfaces between the valve actuating member and that area of the chisel which cooperates with the valve actuating member is subject to particularly low wear. For this reason, it has already become known to provide hard metal inserts on the valve actuating element, which leads to a special one Rapid destruction of the end of the shaft leads, which guarantees no reliable function of the valves and also the rotational movement of the chisel in the chisel holder.
  • the invention has for its object to provide a device that allows a uniform or simultaneous wear of the shaft end or the valve actuation area of the bit and the cutting part of the bit, whereby a longer service life of the valve actuation member is to be ensured, which further ensures is that no unnecessary increase in the mass of the chisel is required, and a free rotational movement of the chisel shaft in the chisel holder is guaranteed even when exposed to heat.
  • the invention is based on a prior art, as formed by AT-PS 358.510, in which a device for mining rock, ores or the like, in particular a tunnel boring machine with a plurality of chisel holders fixedly arranged on a tool carrier, which have a substantially cylindrical recess in which an at least partially cylindrical chisel shaft of a round shank chisel is rotatably and slidably arranged, nozzles, preferably in the chisel holder with liquid supply lines and valves arranged in these, which over the chisel, preferably the end region, of the rock engageable opposite end of the chisel shaft and a valve actuator are controllable.
  • the invention essentially consists in the fact that the actuation area, in particular the end area of the chisel shaft and / or the area of the valve actuation element that can be brought into engagement with the actuation area, is / are constructed with at least two different materials that are metallic with one another, in particular are connected by forging or welding or the like, the hardness of the actuating area of the chisel preferably being at least 5 HRC lower than the area of the actuating member which can be brought into engagement with the chisel shaft.
  • the round shank chisel according to the invention essentially consists in the fact that the chisel has a metal connection at its valve actuation area, in particular at its end areas facing away from the end which can be brought into engagement with the rock, in particular by welding and / or forging or the like. bonded layer of a hard material, in particular at least 55 HRC material, is provided. With such a round shank chisel, it is ensured that the service life of the valve actuation area is coordinated with the service life of the cutting elements, the valve tappet or the like being able to have a greater hardness with the required toughness of the material.
  • a preferred embodiment of the round shank chisel according to the invention is that the metallic layer is provided in an essentially central recess in the end region.
  • a round-shank chisel that is particularly easy to produce is obtained in that the metallic layer is applied by build-up welding.
  • the metallic layer on the picks and / or valve actuation member has between 0.3 to 3.1% by weight of carbon, between 0.7 and 2.5% by weight of silicon, between 5.0 and 33.0% by weight of chromium, up to 2.5% by weight of manganese and up to 2.0% by weight of molybdenum.
  • Such an alloy has both the required hardness and corrosion and abrasion resistance in order to ensure a corresponding service life.
  • FIG. 1 shows a chisel holder with a chisel and valve actuation device, partly in section, and FIG. 2 shows embodiments of round shank chisels.
  • the chisel holder 1 shown in FIG. 1 has an essentially cylindrical recess 2, in which a round shank chisel 3 is arranged over its cylindrical shank region 4.
  • the cylindrical recess 2 has a constriction 5 through which the tapered shaft protrudes with its end region 6.
  • the valve actuator 7a is held in the closed position by a tension spring 8.
  • the valve 9 has a feed line 10 and a valve seat 11. The valve opens into a nozzle 12 provided in the bit holder.
  • the round shank chisel can have a disk 15 connected by forging and made of a steel with the following composition in weight percent C 2.1, Si 0.3, Mn 0.3, Cr 12.0, W at its actuation area 0.7 with an HRC 50, 42CrMo4, HRC 45 being used as the material for the round shank chisel.
  • a recess 13 is provided in the actuating area, in which a conical insert body 14 is built up, for example by welding or electroslag remelting.
  • Suitable electrodes have, for example, the following composition in% by weight:
  • Examples of materials for the actuation area of the valve actuation element and / or the round shank chisel are a hard metal with tungsten carbide and approx. 12-15% by weight cobalt; a high-speed steel with in% by weight C 0.85, Si 0.4, Mn 0.4, Cr 4.5, W 6.7, Mo 5.6, V 2.0 balance iron, a hardness HRC 66, High manganese steel with in% by weight C 1.2, Si 0.4, Mn 12, rest iron.

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)
EP85890267A 1984-11-02 1985-10-24 Dispositif pour l'exploitation de roche et pic à queue ronde pour ce dispositif Expired EP0180572B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT3478/84 1984-11-02
AT0347884A AT381366B (de) 1984-11-02 1984-11-02 Vorrichtung zum abbau von gestein und rundschaftmeissel fuer diese vorrichtung

Publications (2)

Publication Number Publication Date
EP0180572A1 true EP0180572A1 (fr) 1986-05-07
EP0180572B1 EP0180572B1 (fr) 1988-06-15

Family

ID=3551085

Family Applications (1)

Application Number Title Priority Date Filing Date
EP85890267A Expired EP0180572B1 (fr) 1984-11-02 1985-10-24 Dispositif pour l'exploitation de roche et pic à queue ronde pour ce dispositif

Country Status (5)

Country Link
EP (1) EP0180572B1 (fr)
AT (1) AT381366B (fr)
AU (1) AU578754B2 (fr)
DE (1) DE3563368D1 (fr)
ZA (1) ZA857861B (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111022045A (zh) * 2019-12-26 2020-04-17 西安奥奈特固体润滑工程学研究有限公司 一种耐磨潜伏式复合固体润滑采煤机截齿组件及加工方法

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT386651B (de) * 1986-12-10 1988-09-26 Voest Alpine Ag Einrichtung zur zufuehrung von fluessigkeit zu austrittsduesen am umfang eines schraemwerkzeuges
DE3902222C1 (en) * 1989-01-26 1990-06-07 Fa. Michael Komotzki, 4600 Dortmund, De Cutter-pick arrangement

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT334854B (de) * 1974-10-24 1977-02-10 Voest Ag Meisselhalter fur schramwerkzeuge
EP0010534A1 (fr) * 1978-10-19 1980-04-30 VOEST-ALPINE Aktiengesellschaft Dispositif de refroidissement des burins des outils de coupe pour des machines d'abattage et du front de taille et d'empêchement de la formation de poussière
EP0067145A1 (fr) * 1981-06-04 1982-12-15 VOEST-ALPINE Aktiengesellschaft Dispositif de refroidissement pour les outils d'une haveuse
EP0103561A2 (fr) * 1982-08-11 1984-03-21 VOEST-ALPINE Aktiengesellschaft Porte-outil et son procédé de fabrication
GB2138053A (en) * 1983-04-08 1984-10-17 Santrade Ltd Device for supplying fluid to a tool for breaking hard material

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AT334854B (de) * 1974-10-24 1977-02-10 Voest Ag Meisselhalter fur schramwerkzeuge
EP0010534A1 (fr) * 1978-10-19 1980-04-30 VOEST-ALPINE Aktiengesellschaft Dispositif de refroidissement des burins des outils de coupe pour des machines d'abattage et du front de taille et d'empêchement de la formation de poussière
EP0067145A1 (fr) * 1981-06-04 1982-12-15 VOEST-ALPINE Aktiengesellschaft Dispositif de refroidissement pour les outils d'une haveuse
EP0103561A2 (fr) * 1982-08-11 1984-03-21 VOEST-ALPINE Aktiengesellschaft Porte-outil et son procédé de fabrication
GB2138053A (en) * 1983-04-08 1984-10-17 Santrade Ltd Device for supplying fluid to a tool for breaking hard material

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111022045A (zh) * 2019-12-26 2020-04-17 西安奥奈特固体润滑工程学研究有限公司 一种耐磨潜伏式复合固体润滑采煤机截齿组件及加工方法

Also Published As

Publication number Publication date
ZA857861B (en) 1986-05-28
ATA347884A (de) 1986-02-15
EP0180572B1 (fr) 1988-06-15
AU4923485A (en) 1986-05-29
DE3563368D1 (en) 1988-07-21
AT381366B (de) 1986-10-10
AU578754B2 (en) 1988-11-03

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