EP0180572B1 - 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
EP0180572B1
EP0180572B1 EP85890267A EP85890267A EP0180572B1 EP 0180572 B1 EP0180572 B1 EP 0180572B1 EP 85890267 A EP85890267 A EP 85890267A EP 85890267 A EP85890267 A EP 85890267A EP 0180572 B1 EP0180572 B1 EP 0180572B1
Authority
EP
European Patent Office
Prior art keywords
pick
chisel
shank
rock
round 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.)
Expired
Application number
EP85890267A
Other languages
German (de)
English (en)
Other versions
EP0180572A1 (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

  • the invention relates to a device for mining rock and a round shank chisel for this device.
  • cutting machines For large-scale mining of rock, ores or the like, be it 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 swiveling working head. These chisels are arranged in their chisel 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.
  • valve between the nozzle from which the liquid jet emerges and which can be provided in the chisel holder or in the round shank chisel, and the pressure medium reservoir, which acts upon the corresponding one or more Round-shaft chisel is opened with the rock, and is closed again after being engaged.
  • This actuation of the valve can be achieved in a very simple manner in that the round shank bit performs an axial movement in addition to its rotational movement about its own axis when it engages with the rock, whereby a valve actuating member is actuated.
  • Such a device now allows the water jet to be directed only against the material to be mined or against the tip of the round shaft when it is in engagement with the material to be mined.
  • both the shank of the chisel and the chisel holder are constructed from a material which is correspondingly insensitive to impact, while at the same time a high dimensional accuracy and a high resistance to deformation are to be present, that even with temperature increases, e.g. B. by frictional heat of the shaft in the chisel holder, by 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.
  • 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-B-358 510, in which a device for mining rock, ore or the like, in particular a tunneling machine with a plurality of fixedly arranged on a tool carrier Chisel holders, which have a substantially cylindrical recess in which an at least partially cylindrical chisel shaft of a round shank chisel is arranged so as to be rotatable and slidable, nozzles, preferably in the chisel holder with liquid feed lines and valves arranged in these, which over the chisel, preferably the end region of the with the Rock engaging opposite end of the chisel shank and a valve actuator are controllable is described.
  • the invention now 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 at least with two different materials that are metallic with one another, in particular by means of lubrication or welding or the like are connected, the hardness of the actuating area of the chisel being at least 5 HRC less 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 that the chisel has a metallically connected layer made of a hard material 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. in particular at least 55 HRC material.
  • a round shank chisel of this type it is ensured that the service life of the valve actuation area is matched to the service life of the cutting elements, the valve lifter or the like being able to have 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 resistance to corrosion and abrasion 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 projects 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 chisel holder.
  • the function is now as follows: when the round shank chisel engages the rock, the spring 7 is compressed and the actuating region 6 of the round shank chisel comes into engagement with the valve actuating member 7a, whereby the Tension spring 8 tensioned and the valve seat 11 is released. Pressure medium can thus get from the feed line 10 to the nozzle 12.
  • 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)

Claims (6)

1. Dispositif d'exploitation de roches, minerais ou analogues, en particulier machine de percement, muni d'un ensemble de porte-pics (1) fixés sur un porte-outil, qui présentent un évidement (2) sensiblement cylindrique, dans lequel est disposée à rotation et à coulissement une queue de pic (4) au moins partiellement cylindrique d'un pic à queue ronde (3), de buses (12), de préférence dans le porte-pic (1), avec des canalisations d'amenée de liquide (10) et des soupapes (9) disposées dans celles-ci, qui peuvent être commandées par l'intermédiaire du pic (3), de préférence de la zone terminale (6), de l'extrémité opposée de la queue de pic (4) pouvant être amenée en contact avec la roche et un organe de commande de soupape (7a), caractérisé en ce que la zone de manoeuvre, en particulier la zone terminale (6) de la queue de pic (4) et/ou la zone pouvant être amenée en contact avec la zone de manoeuvre de l'organe de manoeuvre de soupape (7a) est réalisée avec au moins deux matériaux différents l'un de l'autre, qui sont réunis métalliquement l'un à l'autre, en particulier par forgeage et/ou soudage ou analogue, la dureté de la zone de manoeuvre du pic étant plus faible d'au moins 5 HRC que la zone pouvant être amenée en contact avec la queue de pic (6) de l'organe de manoeuvre de soupape (7a).
2. Pic à queue ronde pour le dispositif selon la revendication 1, caractérisé en ce que le pic (3) présente en sa zone de manoeuvre de soupape (6) une couche (15) reliée métalliquement, en particulier reliée par soudage et/ou forgeage, en un matériau dur, en particulier en un matériau présentant une dureté Rockwell d'au moins 55.
3. Pic à queue ronde selon la revendication 2, caractérisé en ce que la couche métallique (14) est prévue dans la zone terminale (6) dans un évidement sensiblement central (13).
4. Pic à queue ronde selon la revendication 2 ou 3, caractérisé en ce que la couche métallique est appliquée par soudage d'apport.
5. Pic à queue ronde selon une des revendications 2, 3 ou 4, caractérisé en ce que la couche métallique comporte au moins 0,3 à 3,1 % en poids de carbone, 0,7 à 2,5 % en poids de silicium, 5,0 à 33,0 % en poids de chrome, jusqu'à 2,5 % en poids de manganèse, et jusqu'à 2,0 % en poids de molybdène.
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
AT0347884A AT381366B (de) 1984-11-02 1984-11-02 Vorrichtung zum abbau von gestein und rundschaftmeissel fuer diese vorrichtung
AT3478/84 1984-11-02

Publications (2)

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

Families Citing this family (3)

* 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
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

Family Cites Families (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
AT358510B (de) * 1978-10-19 1980-09-10 Voest Ag Einrichtung zum kuehlen der meissel des schraemwerkzeuges einer schraemmaschine und der ortsbrust
AT370209B (de) * 1981-06-04 1983-03-10 Voest Alpine Ag Einrichtung zum kuehlen der meissel einer schraemmaschine
AT374563B (de) * 1982-08-11 1984-05-10 Voest Alpine Ag Meisselhalter, sowie verfahren zu seiner herstellung
GB2138053B (en) * 1983-04-08 1987-09-03 Santrade Ltd Device for supplying fluid to a tool for breaking hard material

Also Published As

Publication number Publication date
ATA347884A (de) 1986-02-15
AT381366B (de) 1986-10-10
AU578754B2 (en) 1988-11-03
AU4923485A (en) 1986-05-29
ZA857861B (en) 1986-05-28
DE3563368D1 (en) 1988-07-21
EP0180572A1 (fr) 1986-05-07

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