EP0498732A1 - Einheit aus Werkzeug und Werkzeugträger für Tunnelvortriebsmaschinen - Google Patents

Einheit aus Werkzeug und Werkzeugträger für Tunnelvortriebsmaschinen Download PDF

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Publication number
EP0498732A1
EP0498732A1 EP92400312A EP92400312A EP0498732A1 EP 0498732 A1 EP0498732 A1 EP 0498732A1 EP 92400312 A EP92400312 A EP 92400312A EP 92400312 A EP92400312 A EP 92400312A EP 0498732 A1 EP0498732 A1 EP 0498732A1
Authority
EP
European Patent Office
Prior art keywords
tool
base
tool holder
assembly according
slot
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
EP92400312A
Other languages
English (en)
French (fr)
Other versions
EP0498732B1 (de
Inventor
Mohammed Boumahdi
Jean-Pierre Georget
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.)
F C B
Original Assignee
F C B
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Filing date
Publication date
Application filed by F C B filed Critical F C B
Publication of EP0498732A1 publication Critical patent/EP0498732A1/de
Application granted granted Critical
Publication of EP0498732B1 publication Critical patent/EP0498732B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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

Definitions

  • the subject of the present invention is a tool and tool holder assembly intended for use on machines for digging tunnels and galleries.
  • the tool holders are fixed by welding to the cutting member and each tool is mounted on the tool holder so that it can be dismantled and replaced when it is worn out.
  • the mounting of the tool on the tool holder must allow easy and quick replacement of the tools, to avoid too long immobilization of the machine. This is particularly important in the case of a containment tunneling machine (earth, air or mud pressure) where the maintenance personnel responsible for replacing the tools must work inside the rear chamber of the cutting disc. which is maintained under compressed air pressure, which requires the strict application, after intervention, of decompression procedures in the airlock for access to the room, the duration of which depends on the working times and the pressure at which staff have been subdued.
  • the classic solution is to fix the tool on the tool holder with a bolt.
  • This solution requires precise machining of the cooperating surfaces of the tool and the tool holder, to avoid any play which would cause rapid deterioration of these surfaces and would require replacement not only of the tools but also of the tool holders, and is of this relatively expensive.
  • dismantling the fixing bolts after a period of use corresponding to the life of the tools is not always easy.
  • the tool and tool holder assembly which is the subject of the present invention has been designed with the aim of reducing manufacturing costs, by eliminating all machining, and of enabling rapid and easy mounting and dismounting of the tool on the holder. tool.
  • the assembly which is the subject of the invention is characterized in that it consists of a tool holder comprising a base intended to be fixed to a cutting member and at least one wing perpendicular to said base, by a tool in the form of T comprising a head provided with at least one ear in the form of a wedge which is received in a notch of complementary shape formed in the adjacent edge of the wing of the tool holder and a tail extending in the same direction as the ear, and by means to push the ear into the notch and press the tool onto the base of the tool holder.
  • the tool holder comprises two parallel wings spaced from one another on the base, the head of the tool is provided with two wedge-shaped ears which are received in two notches of complementary shape formed in the edge of the wings of the tool holder and the tail of the tool is placed between the two wings.
  • the rear face of the notches will be located in the plane of the front face of the base and the rear face of the tool will be profiled so that it comes into contact with the front face of the base along a generator when the tool is blocked on the tool holder, a slight clearance then remaining between the rear face of the ears and the base.
  • This design allows a blockage without play of the tool in the tool holder by pressing the front face of the ears on the front face of the notches and a generator of the tool on the base without it being necessary to carry out a precise machining of these surfaces, and makes possible the use of raw foundry parts.
  • the means for driving the ears into the notches and pressing the tool onto the base of the tool holder will advantageously consist of a wedge-shaped key housed in a slot pierced in the free end of the tail and wedged between the wall from this slit and the edge of the wings adjacent to this end of the tail.
  • the longitudinal axis of this slot will be inclined relative to the generatrix of the rear face of the tail and the wings will have an appendage whose edge will be inclined relative to the plane of the front face of the base of a angle equal to the inclination of the axis of the slot relative to the generatrix of the rear face of the tail, the relative position of this edge and of the slot and their inclination being such that the key, when it is pressed in the slot, will exert on the tail of the tool an effort comprising a component parallel to the plane of the front face of the base and which will tend to push the ears into the notches and a component perpendicular to this plane and which will stick the tail of the tool on the base.
  • a piece of rubber glued in the slot of the tail of the tool will allow, by adhesion to the edge of the key, under the elastic deformation forces which it undergoes, braking of the key and will prohibit its untimely disassembly under the vibration action for example.
  • Figure 1 is an elevational view of a tool and tool holder assembly according to the invention mounted on the cutting disc of a tunnel boring machine.
  • Figure 2 is a top view of this assembly
  • Figure 3 is a rear view of the assembly; to clarify the figure, the cutting disc on which the tool holder is welded is not shown.
  • Figure 4 is an elevational view of the tool
  • Figure 5 is an elevational view of the tool holder
  • Figure 6 is a top view of the tool holder.
  • reference numbers 10 and 12 denote, respectively, the tool and the tool holder.
  • the tool shown in Figure 4, has the shape of a T and includes a head 14 and a tail 16.
  • the head 14 is provided, on its underside and at the rear thereof, it is ie opposite the cutting edge 18, two wedge-shaped ears 20 arranged on either side of the tail and extending in the same direction as the latter.
  • a slot 22 is pierced in the free end of the tail 16; the longitudinal axis of this slot is inclined relative to the generatrix of the rear face of the tail.
  • the tool holder 12 shown in Figures 5 and 6, consists of a base 24 and two wings 26 perpendicular to the base, mutually parallel and spaced from one another.
  • the base is intended to be fixed on a support, such as the cutting disc 28 of a tunnel boring machine, by a weld bead 30.
  • a notch 32 In one of the edges of each wing, which is the upper edge when the holder tool is in the position shown in the drawings, is provided a notch 32 whose shape is complementary to that of the ears 20 of the tool; the rear face of these notches is located in the plane of the front face of the base.
  • each wing has an appendage 34, the rear face of which is inclined relative to the plane of the front face of the base at an angle equal to the inclination of the longitudinal axis of the slot 22, with respect to to the generator of the rear face of the shank 16 of the tool.
  • the part 36 of the lower edge of each wing adjacent to the rear face of the appendix is perpendicular to this face.
  • the ears and the notches must be dimensioned so that, taking into account manufacturing tolerances, the ears do not abut on the bottom of the notches and the underside of the tool head does not come into contact with the upper edge of the wings of the tool holder.
  • the rear face of the shank and the head of the tool is rounded so that it is in contact with the base along a generator; instead of being rounded, this face could consist of a dihedral with a projecting edge.
  • a slight clearance remains between the base and the ears.
  • a sloping key 38 is used which is force-fitted, by means of a hammer, into the slot 22 of the tool shank.
  • the key exerts on the tool a force comprising a component parallel to the plane of the base and which tends to drive the ears 20 in the notches 32 and a component perpendicular to this plane which presses the tail of the tool on the base.
  • the vertical component allows the tool to be properly secured in the tool holder, without play, and the horizontal component prohibited by bracing, any pivoting of the tool under the forces applied during work on the cutting edge of the tool in the direction of Arrow F.
  • Means other than a key could be used to block the tool on the tool holder by resting on the wings of the tool holder and by exerting on the tail of the tool an oriented effort as defined above.
  • a rubber bead 40 glued into the slot 22, at its upper end, allows adhesion to the edge of the key, under the elastic deformation forces to which it is subjected, braking of the key and prohibits its untimely disassembly.
  • the tool holder can be made of molded steel that can be easily welded with a simple operating mode on the cutting disc.
  • the tool can be made of white cast iron strongly alloyed with chromium and manganese. As already indicated, no machining of these parts is necessary.

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)
  • Excavating Of Shafts Or Tunnels (AREA)
  • Cutting Tools, Boring Holders, And Turrets (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Milling Processes (AREA)
EP92400312A 1991-02-08 1992-02-07 Einheit aus Werkzeug und Werkzeugträger für Tunnelvortriebsmaschinen Expired - Lifetime EP0498732B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9101447 1991-02-08
FR9101447A FR2672635B1 (fr) 1991-02-08 1991-02-08 Ensemble outil et porte-outil pour machine de creusement de tunnels et galeries.

Publications (2)

Publication Number Publication Date
EP0498732A1 true EP0498732A1 (de) 1992-08-12
EP0498732B1 EP0498732B1 (de) 1994-08-31

Family

ID=9409504

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92400312A Expired - Lifetime EP0498732B1 (de) 1991-02-08 1992-02-07 Einheit aus Werkzeug und Werkzeugträger für Tunnelvortriebsmaschinen

Country Status (6)

Country Link
EP (1) EP0498732B1 (de)
AT (1) ATE110821T1 (de)
DE (1) DE69200357T2 (de)
DK (1) DK0498732T3 (de)
ES (1) ES2060454T3 (de)
FR (1) FR2672635B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2823793A1 (fr) * 2001-04-24 2002-10-25 Nfm Tech Dispositif de fixation d'un outil de travail sur une machine de creusement ou de ramassage de deblais ou de minerais
US6876006B1 (en) 1999-04-27 2005-04-05 Schlumberger Technology Corporation Radiation source

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1121008A (en) * 1965-11-03 1968-07-24 Poudres Metalliques Alliages Speciaux Ugine Carbone Improvements in mining tools having removable tips
US3820849A (en) * 1972-12-01 1974-06-28 Sandvik Ab Cutting tips removably secured in milling cutter head
FR2382307A1 (fr) * 1977-03-03 1978-09-29 Sandvik Ab Dispositif de montage de porte-outils dans une tete de coupe d'une foreuse de roches
GB2077810A (en) * 1980-06-17 1981-12-23 Anderson Strathclyde Ltd Detachable pick support

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1121008A (en) * 1965-11-03 1968-07-24 Poudres Metalliques Alliages Speciaux Ugine Carbone Improvements in mining tools having removable tips
US3820849A (en) * 1972-12-01 1974-06-28 Sandvik Ab Cutting tips removably secured in milling cutter head
FR2382307A1 (fr) * 1977-03-03 1978-09-29 Sandvik Ab Dispositif de montage de porte-outils dans une tete de coupe d'une foreuse de roches
GB2077810A (en) * 1980-06-17 1981-12-23 Anderson Strathclyde Ltd Detachable pick support

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6876006B1 (en) 1999-04-27 2005-04-05 Schlumberger Technology Corporation Radiation source
FR2823793A1 (fr) * 2001-04-24 2002-10-25 Nfm Tech Dispositif de fixation d'un outil de travail sur une machine de creusement ou de ramassage de deblais ou de minerais
EP1253286A1 (de) * 2001-04-24 2002-10-30 NFM Technologies Einrichtung zum Befestigen von Schneidwerkzeugen in einer Tunnelvortriebsmaschine

Also Published As

Publication number Publication date
DE69200357T2 (de) 1995-02-16
ATE110821T1 (de) 1994-09-15
FR2672635B1 (fr) 1994-02-18
FR2672635A1 (fr) 1992-08-14
DE69200357D1 (de) 1994-10-06
ES2060454T3 (es) 1994-11-16
EP0498732B1 (de) 1994-08-31
DK0498732T3 (da) 1995-01-30

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