EP0405207A2 - Device for coupling a drill rod for tapholes of shaft furnaces to the working tool of a drilling machine - Google Patents

Device for coupling a drill rod for tapholes of shaft furnaces to the working tool of a drilling machine Download PDF

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Publication number
EP0405207A2
EP0405207A2 EP90110951A EP90110951A EP0405207A2 EP 0405207 A2 EP0405207 A2 EP 0405207A2 EP 90110951 A EP90110951 A EP 90110951A EP 90110951 A EP90110951 A EP 90110951A EP 0405207 A2 EP0405207 A2 EP 0405207A2
Authority
EP
European Patent Office
Prior art keywords
rod
plug
piston
clamp
spring
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
EP90110951A
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German (de)
French (fr)
Other versions
EP0405207B1 (en
EP0405207A3 (en
Inventor
Jean Metz
Severino Venturini
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.)
Paul Wurth SA
Original Assignee
Paul Wurth SA
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 Paul Wurth SA filed Critical Paul Wurth SA
Publication of EP0405207A2 publication Critical patent/EP0405207A2/en
Publication of EP0405207A3 publication Critical patent/EP0405207A3/en
Application granted granted Critical
Publication of EP0405207B1 publication Critical patent/EP0405207B1/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C21—METALLURGY OF IRON
    • C21B—MANUFACTURE OF IRON OR STEEL
    • C21B7/00—Blast furnaces
    • C21B7/12—Opening or sealing the tap holes
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T279/00—Chucks or sockets
    • Y10T279/17—Socket type
    • Y10T279/17128—Self-grasping
    • Y10T279/17171—One-way-clutch type
    • Y10T279/17179—Wedge
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T408/00—Cutting by use of rotating axially moving tool
    • Y10T408/94—Tool-support
    • Y10T408/95—Tool-support with tool-retaining means

Definitions

  • the present invention relates to a device for coupling a drilling rod from the tap hole of a shaft furnace to the working tool of a drilling machine for implementing a method according to which the closure and the opening of the taphole comprise a setting operation and an operation of extracting the piercing rod which is abandoned in the mass of the taphole between two successive castings, said device comprising a mandrel to be made integral of the working tool and which comprises a front receiving cavity for receiving the end of the piercing rod, a clamp for hanging the end of said rod in this cavity, this clamp consisting of at least two rods sliding devices arranged symmetrically around the axis of the cavity, and each carrying at one end a jaw intended to grip the end of the rod and, at the opposite end, a piston subjected, on the one hand, to the '' action of a pneumatic or hydraulic fluid to close the clamp by penetration of the jaws into the rod and, on the other hand, to elastic means acting in the direction of opening of the clamp, each of said pistons sliding in
  • a device of this kind is known from French patent 2,501,857.
  • the working tool is generally constituted by a pneumatic striker which can strike in both directions in order to push the piercing rod into the blocking mass before the hardening of that -this and to be able to extract it when opening the tap hole.
  • Pneumatic fluid used for the striker can also be used to close the pliers when extracting the piercing rod, while when engaging the piercing rod, the pneumatic chamber of the pliers piston is ventilated to allow opening of these clamps under the action according to their elastic means.
  • the object of the present invention is to provide an improved device of the type described in the preamble which does not have these drawbacks.
  • the device proposed by the present invention is essentially characterized by a spring disposed between said plug and the adjacent face of the piston, said spring being powerful enough to keep the piston away from the plug against the action of said means. elastic to which it is exposed on the opposite side.
  • the plug preferably has a cylindrical cavity for housing the spring.
  • This device comprises a mandrel 10 provided with a front cavity 12 for receiving the free end of a piercing rod 14 and a rear axial bore 16 for receiving the striker of a work tool not shown.
  • the device comprises a clamp for gripping the front end of the rod 14.
  • This clamp consists of two jaws arranged symmetrically around the longitudinal axis of the mandrel 1o and sliding obliquely relative to this axis 0.
  • One of these jaws is represented by the reference 18, while the other which is not visible is identical to the one which is represented and functions in the same way.
  • the jaw 18 is mounted on the front end of a rod 20 and is guided by the interior surface of the cavity 12.
  • the rod 20 is extended in a cylindrical chamber 26 where it is integral with a piston 22.
  • This piston 22 is, in the example shown, a pneumatic piston which undergoes, on the side opposite to the rod 20, the action of a pneumatic fluid penetrating into the chamber 26 via a pipe 24.
  • a pneumatic piston Around the rod 20 is one or more helical springs 28 bearing, on the one hand, on the piston 22 and, on the other hand, on an inner rim of the pneumatic chamber 26.
  • the pressurization of the chamber 26 through the pneumatic line 24 advances the jaw 28 up to '' with superficial penetration in the rod 14 so that a movement to the right of the mandrel 10 drives the rod 14.
  • the ventilation of the chamber 26 subjects the piston 22 to the action of the spring 28 to release the jaw 18 of the rod 14. This is for example the case during the engagement nt of the rod 14 in the plugging mass of the tap hole.
  • the invention proposes to have a spring 32 between the piston 22 and the plug 30.
  • This comprises, at this Indeed, preferably a cylindrical chamber 34 for housing this spring 32.
  • This spring 32 is powerful enough to oppose, in part, the action of the spring 28 and maintain, when the chamber 26 is ventilated, the piston 22 away from the inner surface of the plug 30 and thus avoid hammering of the plug 30 by the piston 22.
  • the mandrel 10 unlike the known mandrels, is a one-piece machined mandrel which contributes to greater longevity, since it does not include a bolt and assembly screws which, in general, are very vulnerable by repeated percussion.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Blast Furnaces (AREA)
  • Earth Drilling (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Gripping On Spindles (AREA)

Abstract

Le dispositif comprend un mandrin (10) conçu pour être rendu solidaire de l'outil de travail et qui comporte une cavité frontale (12) de réception de l'extrémité de la tige de perçage (14), une pince pour accrocher l'extrémité de ladite tige (14) dans cette cavité (12) et actionnée par des pistons (22) pneumatiques ou hydrauliques coulissant dans une chambre cylindrique fermée à l'arrière par un bouchon (30). Pour éviter une usure rapide de ce bouchon, un ressort (32) est disposé entre ledit bouchon (30) et la face adjacente du piston (22), ce ressort (30) étant suffisamment puissant pour maintenir le piston (22) à l'écart du bouchon (30).The device comprises a mandrel (10) designed to be made integral with the working tool and which comprises a front cavity (12) for receiving the end of the piercing rod (14), a clamp for hanging the end of said rod (14) in this cavity (12) and actuated by pneumatic or hydraulic pistons (22) sliding in a cylindrical chamber closed at the rear by a plug (30). To avoid rapid wear of this plug, a spring (32) is disposed between said plug (30) and the adjacent face of the piston (22), this spring (30) being powerful enough to hold the piston (22) at gap of the plug (30).

Description

La présente invention concerne un dispositif d'accouplement d'une tige de perçage du trou de coulée d'un four à cuve à l'outil de travail d'une machine de perçage pour la mise en oeuvre d'un procédé selon lequel la fermeture et l'ouverture du trou de coulée comportent une opération de mise en place et une opération d'extraction de la tige de perçage qui est abandonnée dans la masse du trou de coulée entre deux coulées successives, ledit dispositif comprenant un mandrin pour être rendu solidaire de l'outil de travail et qui comporte une cavité frontale de réception pour recevoir l'extrémité de la tige de perçage, une pince pour accrocher l'extrémité de ladite tige dans cette cavité, cette pince étant constituée d'au moins de deux tiges coulissantes disposées symétriquement autour de l'axe de la cavité, et portant, chacune, à une extrémité un mors destiné à saisir l'extrémité de la tige et, à l'extrémité opposée, un piston soumis, d'une part, à l'action d'un fluide pneumatique ou hydraulique pour fermer la pince par pénétration des mors dans la tige et, d'autre part, à des moyens élastiques agissant dans le sens d'une ouverture de la pince, chacun des­dits pistons coulissant dans une chambre cylindrique étanche fermée à l'arrière par un bouchon.The present invention relates to a device for coupling a drilling rod from the tap hole of a shaft furnace to the working tool of a drilling machine for implementing a method according to which the closure and the opening of the taphole comprise a setting operation and an operation of extracting the piercing rod which is abandoned in the mass of the taphole between two successive castings, said device comprising a mandrel to be made integral of the working tool and which comprises a front receiving cavity for receiving the end of the piercing rod, a clamp for hanging the end of said rod in this cavity, this clamp consisting of at least two rods sliding devices arranged symmetrically around the axis of the cavity, and each carrying at one end a jaw intended to grip the end of the rod and, at the opposite end, a piston subjected, on the one hand, to the '' action of a pneumatic or hydraulic fluid to close the clamp by penetration of the jaws into the rod and, on the other hand, to elastic means acting in the direction of opening of the clamp, each of said pistons sliding in a cylindrical chamber waterproof closed at the back by a plug.

Un dispositif de ce genre est connu du brevet français 2 501 857. L'outil de travail est généralement constitué par un percuteur pneumatique pouvant frapper dans les deux sens afin d'enfoncer la tige de percage dans la masse de bouchage avant le durcissement de celle-ci et pour pouvoir l'en extraire lors de l'ouverture du trou de coulée. Le fluide pneumatique utilisé pour le percuteur peut également être utilisé pour fermer les pinces lors de l'extraction de la tige de perçage, tandis que lors de l'engagement de la tige de perçage, la chambre pneumatique du piston de la pince est aérée pour permettre l'ouverture de ces pinces sous l'action selon leur moyen élastique.A device of this kind is known from French patent 2,501,857. The working tool is generally constituted by a pneumatic striker which can strike in both directions in order to push the piercing rod into the blocking mass before the hardening of that -this and to be able to extract it when opening the tap hole. Pneumatic fluid used for the striker can also be used to close the pliers when extracting the piercing rod, while when engaging the piercing rod, the pneumatic chamber of the pliers piston is ventilated to allow opening of these clamps under the action according to their elastic means.

Lors de l'engagement de la tige de perçage dans la masse de bouchage, l'action percutante du percuteur provoque, comme contre-réaction et par suite de l'inertie des pinces des vibrations de celle-ci qui entraînent un martèlement du bouchon par les pistons. C'est la raison pour laquelle on constate une détérioration rapide de ces bouchons ainsi que de leur filet et de ceux du mandrin.When the piercing rod is engaged in the plugging mass, the percussive action of the striker causes, as a feedback and as a result of the inertia of the clamps, vibrations thereof which cause the plug to be hammered by the pistons. This is why there is a rapid deterioration of these plugs as well as their thread and those of the mandrel.

Le but de la présente invention est de prévoir un dispositif perfectionné du genre décrit dans le préam­bule qui ne présente pas ces inconvénients.The object of the present invention is to provide an improved device of the type described in the preamble which does not have these drawbacks.

Pour atteindre cet objectif, le dispositif proposé par la présente invention est essentiellement caractérisé par un ressort disposé entre ledit bouchon et la face adjacente du piston, ledit ressort étant suffisamment puissant pour maintenir le piston à l'écart du bouchon contre l'action desdits moyens élastiques auquel il est exposé sur la face opposée.To achieve this objective, the device proposed by the present invention is essentially characterized by a spring disposed between said plug and the adjacent face of the piston, said spring being powerful enough to keep the piston away from the plug against the action of said means. elastic to which it is exposed on the opposite side.

Le bouchon comporte, de préférence, une cavité cylin­drique pour le logement du ressort.The plug preferably has a cylindrical cavity for housing the spring.

D'autres particularités et caractéristiques ressorti­ront de la description détaillée d'un mode de réalisation avantageux, présenté ci-dessous, à titre d'illustration, en référence à la figure unique qui représente schématiquement une coupe longitudinale à travers un dispositif d'accouplement tel que proposé par l'invention.Other particularities and characteristics will emerge from the detailed description of an advantageous embodiment, presented below, by way of illustration, with reference to the single figure which schematically represents a longitudinal section through a coupling device such as proposed by the invention.

Ce dispositif comporte un mandrin 10 pourvu d'une cavité frontale 12 de réception de l'extrémité libre d'une tige de perçage 14 et d'un alésage axial arrière 16 pour la réception du percuteur d'un outil de travail non représenté.This device comprises a mandrel 10 provided with a front cavity 12 for receiving the free end of a piercing rod 14 and a rear axial bore 16 for receiving the striker of a work tool not shown.

Comme dans le document précité, le dispositif comporte une pince pour saisir l'extrémité avant de la tige 14. Cette pince est constituée de deux mors disposés symé­triquement autour de l'axe longitudinal du mandrin 1o et coulissant obliquement par rapport à cet axe 0. L'un de ces mors est représenté par la référence 18, tandis que l'autre qui n'est pas visible est identique à celui qui est représenté et fonctionne de la même manière. Le mors 18 est monté sur l'extrémité avant d'une tige 20 et est guidé par la surface intérieur de la cavité 12. La tige 20 se prolonge dans une chambre cylindrique 26 où elle est solidaire d'un piston 22. Ce piston 22 est, dans l'exemple représenté un piston pneumatique qui subit, du côté opposé à la tige 20 l'action d'un fluide pneumatique pénétrant dans la chambre 26 par une conduite 24. Autour de la tige 20 se trouve un ou plusieurs ressorts hélicoïdaux 28 prenant appui, d'une part, sur le piston 22 et, d'autre part, sur un rebord intérieur de la chambre pneumatique 26. La mise sous pression de la chambre 26 à travers la conduite pneuma­tique 24 fait avancer le mors 28 jusqu'à pénétration superficielle dans la tige 14 de sorte qu'un mouvement vers la droite du mandrin 10 entraîne la tige 14. Par contre, l'aération de la chambre 26 soumet le piston 22 à l'action du ressort 28 pour dégager le mors 18 de la tige 14. Tel est par exemple le cas lors de l'engagement de la tige 14 dans la masse de bouchage du trou de coulée.As in the aforementioned document, the device comprises a clamp for gripping the front end of the rod 14. This clamp consists of two jaws arranged symmetrically around the longitudinal axis of the mandrel 1o and sliding obliquely relative to this axis 0. One of these jaws is represented by the reference 18, while the other which is not visible is identical to the one which is represented and functions in the same way. The jaw 18 is mounted on the front end of a rod 20 and is guided by the interior surface of the cavity 12. The rod 20 is extended in a cylindrical chamber 26 where it is integral with a piston 22. This piston 22 is, in the example shown, a pneumatic piston which undergoes, on the side opposite to the rod 20, the action of a pneumatic fluid penetrating into the chamber 26 via a pipe 24. Around the rod 20 is one or more helical springs 28 bearing, on the one hand, on the piston 22 and, on the other hand, on an inner rim of the pneumatic chamber 26. The pressurization of the chamber 26 through the pneumatic line 24 advances the jaw 28 up to '' with superficial penetration in the rod 14 so that a movement to the right of the mandrel 10 drives the rod 14. On the other hand, the ventilation of the chamber 26 subjects the piston 22 to the action of the spring 28 to release the jaw 18 of the rod 14. This is for example the case during the engagement nt of the rod 14 in the plugging mass of the tap hole.

Le fond de la chambre pneumatique 26 est fermé à l'aide d'un bouchon 30 qui peut-être simplement visé, de manière étanche, dans le mandrin 10. Pour éviter le martèlement de ce bouchon par le piston 22 par suite de la contre-réaction qu'il subit lors de l'action du percuteur lorsque la tige 14 est engagée dans le trou de coulée, l'invention propose de disposer un ressort 32 entre le piston 22 et le bouchon 30. Celui-ci comporte, à cet effet, de préférence une chambre cylindrique 34 pour le logement de ce ressort 32. Ce ressort 32 est suffisamment puissant pour s'opposer, en partie, à l'action du ressort 28 et maintenir, lorsque la chambre 26 est aérée, le piston 22 à l'écart de la surface intérieur du bouchon 30 et éviter ainsi le martèlement du bouchon 30 par le piston 22.The bottom of the pneumatic chamber 26 is closed by means of a plug 30 which can simply be sealed in the mandrel 10. To avoid hammering of this plug by the piston 22 as a result of the counter reaction which it undergoes during the action of the striker when the rod 14 is engaged in the taphole, the invention proposes to have a spring 32 between the piston 22 and the plug 30. This comprises, at this Indeed, preferably a cylindrical chamber 34 for housing this spring 32. This spring 32 is powerful enough to oppose, in part, the action of the spring 28 and maintain, when the chamber 26 is ventilated, the piston 22 away from the inner surface of the plug 30 and thus avoid hammering of the plug 30 by the piston 22.

Selon une autre caractéristique de la présente invention le mandrin 10 contrairement aux mandrins connus est un mandrin monobloc usiné qui contribue à une plus grande longévité, étant donné qu'il ne comporte pas de boulon et de vis d'assemblage qui, en général, sont très vulnérables par les percussions répétées.According to another characteristic of the present invention, the mandrel 10, unlike the known mandrels, is a one-piece machined mandrel which contributes to greater longevity, since it does not include a bolt and assembly screws which, in general, are very vulnerable by repeated percussion.

Claims (3)

1. Dispositif d'accouplement d'une tige de perçage du trou de coulée d'un four à cuve à l'outil de travail d'une machine de perçage pour la mise en oeuvre d'un procédé selon lequel la fermeture et l'ouverture du trou de coulée comportent une opération de mise en place et une opération d'extraction de la tige de perçage (14), qui est abandonnée dans la masse du trou de coulée entre deux coulées successives, ledit dispositif comprenant un mandrin (10) conçu pour être rendu solidaire de l'outil de travail et qui comporte une cavité frontale (12) de réception de l'extrémité de la tige de perçage (14), une pince pour accrocher l'extrémité de ladite tige (14) dans cette cavité (12), la pince étant constituée d'au moins deux tiges coulissantes (20) disposées symétriquement autour de l'axe (0) de la cavité (12) et portant, chacune, à une extrémité un mors (18) destiné à saisir l'extrémité de la tige (14) et, à l'extrémité opposée, un piston (22) soumis, d'une part, à l'action d'un fluide pneumatique ou hydraulique pour fermer la pince par pénétration des mors (18) dans la tige (14) et, d'autre part, à des moyens élastiques (28) agissant dans le sens d'une ouverture de la pince, chacun desdits pistons (22) coulissant dans une chambre cylindrique étanche (26) fermée à l'arrière par un bouchon (30), caractérisé par un ressort (32) disposé entre ledit bouchon (30) et la face adjacente du piston (22), ce ressort (30) étant suffisamment puissant pour maintenir le piston (22) à l'écart du bouchon (30), contre l'action desdits moyens élastiques (28).1. Device for coupling a drilling rod from the pouring hole of a shaft furnace to the working tool of a drilling machine for the implementation of a method according to which the closing and the taphole opening comprise a setting operation and an extraction operation of the piercing rod (14), which is abandoned in the mass of the taphole between two successive castings, said device comprising a mandrel (10) designed to be secured to the working tool and which comprises a front cavity (12) for receiving the end of the piercing rod (14), a clamp for hanging the end of said rod (14) in this cavity (12), the clamp consisting of at least two sliding rods (20) arranged symmetrically around the axis (0) of the cavity (12) and each carrying at one end a jaw (18) intended to grasp the end of the rod (14) and, at the opposite end, a subject piston (22), on the one hand, to the action of a pneumatic or hydraulic fluid to close the clamp by penetration of the jaws (18) into the rod (14) and, on the other hand, to elastic means (28) acting in the direction of opening of the clamp, each of said pistons (22) sliding in a sealed cylindrical chamber (26) closed at the rear by a plug (30), characterized by a spring (32) disposed between said plug (30) and the adjacent face of the piston (22), this spring (30) being powerful enough to keep the piston (22) away from the plug (30), against the action of said elastic means (28). 2. Dispositif selon la revendication 1, caractérisé en ce que le bouchon (30) comporte une cavité cylindrique (34) pour le logement du ressort (32).2. Device according to claim 1, characterized in that the plug (30) comprises a cylindrical cavity (34) for housing the spring (32). 3. Dispositif selon l'une quelconque des revendications 1 ou 2, caractérisé en ce que le mandrin (10) est un mandrin monobloc.3. Device according to any one of claims 1 or 2, characterized in that the mandrel (10) is a one-piece mandrel.
EP90110951A 1989-06-30 1990-06-09 Device for coupling a drill rod for tapholes of shaft furnaces to the working tool of a drilling machine Expired - Lifetime EP0405207B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
LU87546A LU87546A1 (en) 1989-06-30 1989-06-30 DEVICE FOR COUPLING A DRILLING ROD FROM THE CASTING HOLE OF A TANK OVEN TO THE WORKING TOOL OF A DRILLING MACHINE
LU87546 1989-06-30

Publications (3)

Publication Number Publication Date
EP0405207A2 true EP0405207A2 (en) 1991-01-02
EP0405207A3 EP0405207A3 (en) 1991-09-11
EP0405207B1 EP0405207B1 (en) 1994-09-28

Family

ID=19731170

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90110951A Expired - Lifetime EP0405207B1 (en) 1989-06-30 1990-06-09 Device for coupling a drill rod for tapholes of shaft furnaces to the working tool of a drilling machine

Country Status (10)

Country Link
US (1) US5056968A (en)
EP (1) EP0405207B1 (en)
JP (1) JP2805382B2 (en)
AT (1) AT403379B (en)
AU (1) AU621487B2 (en)
BR (1) BR9003153A (en)
CA (1) CA2017415A1 (en)
DE (1) DE4016035A1 (en)
ES (1) ES2062186T3 (en)
LU (1) LU87546A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0573766A1 (en) * 1992-06-10 1993-12-15 Paul Wurth S.A. Combination clamping chuck for a shaft furnace taphole piercing machine

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
LU88058A1 (en) * 1992-01-24 1993-08-17 Paul Wurth S.A. DRILLING MACHINE FOR A CAST HOLE OF A TANK OVEN
FI925647A (en) * 1992-12-11 1994-06-12 Outokumpu Chrome Oy The gas pipe feeder melts into the furnace containing the material

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3241746A1 (en) * 1982-02-03 1983-08-04 Paul Wurth S.A., 1122 Luxembourg DEVICE FOR COUPLING A BORING ROD FOR CHAMBER TAPE HOLES WITH THE WORK TOOL OF A DRILLING MACHINE

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3862750A (en) * 1972-10-17 1975-01-28 Inland Steel Co Tophole opening apparatus
LU78756A1 (en) * 1977-12-22 1978-04-17
DE3339127A1 (en) * 1983-10-28 1985-05-09 Dango & Dienenthal Maschinenbau GmbH, 5900 Siegen GRIPING DEVICE FOR RODS INSERTIBLE INTO THE STITCH HOLE OF METALLURGICAL OFENS, IN PARTICULAR TAPPING RODS
JPS60169250U (en) * 1984-04-16 1985-11-09 マツダ株式会社 Rod chucking device for taphole opening
LU87010A1 (en) * 1987-10-06 1989-05-08 Wurth Paul Sa DEVICE FOR MOUNTING A CLAMP FOR THE COUPLING OF A DRILLING ROD FROM THE CASTING HOLE OF A TANK OVEN TO A DRILLING MACHINE

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3241746A1 (en) * 1982-02-03 1983-08-04 Paul Wurth S.A., 1122 Luxembourg DEVICE FOR COUPLING A BORING ROD FOR CHAMBER TAPE HOLES WITH THE WORK TOOL OF A DRILLING MACHINE

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0573766A1 (en) * 1992-06-10 1993-12-15 Paul Wurth S.A. Combination clamping chuck for a shaft furnace taphole piercing machine
US5348430A (en) * 1992-06-10 1994-09-20 Paul Wurth S.A. Universal chuck for a machine for piercing a tap hole of a shaft furnace

Also Published As

Publication number Publication date
JP2805382B2 (en) 1998-09-30
US5056968A (en) 1991-10-15
CA2017415A1 (en) 1990-12-31
ES2062186T3 (en) 1994-12-16
JPH0339409A (en) 1991-02-20
AU5576290A (en) 1991-01-03
AT403379B (en) 1998-01-26
LU87546A1 (en) 1991-02-18
EP0405207B1 (en) 1994-09-28
DE4016035A1 (en) 1991-01-03
BR9003153A (en) 1991-08-27
AU621487B2 (en) 1992-03-12
ATA103490A (en) 1997-06-15
EP0405207A3 (en) 1991-09-11

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