EP2188493A1 - Roller drill or roller bit - Google Patents

Roller drill or roller bit

Info

Publication number
EP2188493A1
EP2188493A1 EP07818222A EP07818222A EP2188493A1 EP 2188493 A1 EP2188493 A1 EP 2188493A1 EP 07818222 A EP07818222 A EP 07818222A EP 07818222 A EP07818222 A EP 07818222A EP 2188493 A1 EP2188493 A1 EP 2188493A1
Authority
EP
European Patent Office
Prior art keywords
roller
drilling tool
cutting
tool according
shaft
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
EP07818222A
Other languages
German (de)
French (fr)
Other versions
EP2188493B1 (en
Inventor
Ulrich Bechem
Philip Bechem
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.)
Caterpillar Global Mining HMS GmbH
Original Assignee
Bucyrus Europe GmbH
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 Bucyrus Europe GmbH filed Critical Bucyrus Europe GmbH
Priority to PL07818222T priority Critical patent/PL2188493T3/en
Publication of EP2188493A1 publication Critical patent/EP2188493A1/en
Application granted granted Critical
Publication of EP2188493B1 publication Critical patent/EP2188493B1/en
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21C—MINING OR QUARRYING
    • E21C27/00—Machines which completely free the mineral from the seam
    • E21C27/20—Mineral freed by means not involving slitting
    • E21C27/32—Mineral freed by means not involving slitting by adjustable or non-adjustable planing means with or without loading arrangements

Definitions

  • the invention relates to a roller drill or a roller chisel for removing material such as rocks, minerals or the like. according to the undercutting principle, with a concentrically around a central axis formed around, conically widening to the end face of the roller drilling tool cutting surface and with a support body which is arranged on the inside of the cutting surface and extends to the front side of the tool.
  • roller drilling tools or roller bits operating on the undercutting principle are characterized by unilateral conical tool bodies or discs which are attached to drill heads or tool arms of e.g. Plug driving machines are mounted such that the roller drilling tools can rotate freely about its central axis.
  • the removal of the material, in particular rock, hard rock or mineral rock, according to the undercutting principle takes place in thin layers. The material is broken out with the conical widening from the drill head and the rock in thin layers undercutting releasing cutting surfaces in mostly palm-sized pieces.
  • a plurality of roller bits or roller drilling tools are usually mounted on a rotary head which is rotatable and / or rotationally driven with impact superposition (cf., for example, DE 198 38 195 A1 or WO 92/10647).
  • roller drilling tools or roller bits working according to the undercutting principle are attached obliquely to the stone front to be dismantled with conically widening cutting surfaces formed only on one side, the cutting surfaces of the roller bits and in particular special exposed the cutting edge at the transition of the cutting surface in the front side systemic high axial forces.
  • the axial forces in turn, in particular at the cutting edge at the free edge of the cutting surface cause a system-related rapid wear of the individual roller bits.
  • the object of the invention is to provide a roller drilling tool or a roller chisel, the service life or service life is improved over the prior art.
  • the cutting surface made of a harder material than the support body and that the support body forms an annular web which extends conically at least on its outer OHmonswand and bounds with its inner peripheral wall a free space on the end face of the tool. Due to the interaction of the different material combination of hardened or harder cutting surface and softer support body on the one hand and the free space in the support region of the support body, i. viewed radially behind the cutting surface, on the other hand, it is achieved that, over a comparatively long period of time, the cutting edge at the transition of the cutting surface into the front side can independently re-sharpen.
  • the CaribbeannachJemrf bin is achieved in particular by the fact that with a wear of the hardened cutting surface and the underlying behind the softer material of the support body is weggeschlissen by the stone to be removed, whereby substantially permanently only the hardened cutting surface is in contact engagement with the material to be ablated.
  • the space as a cavity or the like. is trained; the clearance in the radial direction behind the support body could also be filled with even softer material than the material of the support body.
  • the free space in the back of the support body is formed as a hollow depression. It is particularly advantageous if the free space from the end face of the tool at least partially over the axial extent of the Cutting surface of the tool extends. The deeper the free space is formed in the axial direction, the greater the effective axial length of the cutting surface, in which a self-resharpening of the cutting edge of the roller bit can be achieved. In the cavity behind the Stutzkorper the weggeschlissene material of the Stutzkorpers can also temporarily accumulate.
  • the annular web between its inner peripheral wall and its outer peripheral wall to an exactly constant or substantially constant thickness.
  • This embodiment has the advantage that the roller drilling tool over its entire service life when repositioning the same restoring forces in the machine on which the roller drilling tools are used, as regardless of the degree of wear, thus from the axial shortening of the cutting surface of hardened material, the same cross section soft Stutzkorpermaterial must be weggeschl admirt to achieve that only the cutting edge of harder material is in operative engagement with the ablated rock.
  • the inner circumferential wall expediently runs conically, as a result of which the free space or the depression likewise tapers conically towards the bottom of the free space.
  • the cone angle of the inner peripheral wall and the cone angle of the cutting surface can be exactly the same.
  • the web thickness of the annular web is only approximately constant.
  • the cone angle of the inner peripheral wall and the cone angle of the cutting surface can advantageously deviate from one another by less than 8 °, in particular less than 5 °, preferably less than 2 °.
  • the web thickness can also vary, with the web thickness usually being usually two to ten times thicker than the radial thickness of the cutting surface. Overall, the web thickness should be as thin as possible to be able to wear away the softer material at the same time.
  • roller bits according to the invention or roller drilling tools with hardened, radially truncated by means of annular Stutzkorper cutting surfaces can be constructed differently.
  • the Stutzkorper a cylindrical neck ⁇ section and a conical, the ring land forming collar portion.
  • the cutting surface may consist of a surface hardening or hard layer applied to the conically extending outer circumferential wall of the annular web.
  • the cutting surface may consist of cutting segments or hard metal segments attached to the conically extending outer circumferential wall of the annular web.
  • the cutting segments or hard metal segments can be attached to the outer peripheral wall of the annular web of the Stutzkorpers, in particular be angelotet or soldered.
  • the use of cutting segments has the advantage that the concentric circumferential cutting surface can be produced relatively easily.
  • the cutting segments or hard metal segments may be covered by at least one ring or a cover layer, which consists of softer material than the cutting surface.
  • a corresponding ring or a corresponding cover layer thus ensure an additional fixation of the cutting segments and thus the cutting surface on the Stutzkorper.
  • the material of the ring or the cover layer is expediently also softer than the material of the annular web in order not to negatively influence the retightening effect of the inventive tool.
  • the cutting surface may be part of a cutting ring having a cylindrical neck portion and a conical collar portion, on the inside of the Stutzkorper rests or is formed.
  • the entire cutting ring can then consist of hard metal or other wear-resistant material.
  • the neck section can at the same time be provided with a shaft head receptacle for preferably rotationally fixed reception of a shaft end of a shaft end. ner tool shaft be provided.
  • the Kleiranin may also have a clamping collar with bevel and be connected by a screw with a shaft end of a tool shaft.
  • the support body with its annular web detachably abut against the inside of the cutting ring and having an integrally connected to the annular web floor, which can be clamped axially against the neck portion of the cutting ring by means of a screwed into the shaft end of a tool shaft screwing means.
  • roller drilling tools or roller bits according to the invention can be particularly advantageously connected to one shaft end of a tool shaft, which are supported by means of two arranged on the circumference of a shaft shaft of the tool shaft bearing and the other, free shaft end axially supporting thrust bearing in a shaft receiving a machine head.
  • a corresponding storage of the tool shafts for roller drilling tools on machine heads is of independent inventive importance and can also be used in roller drilling tools that have integral cutting surfaces made of a single material or a material with uniform hardness.
  • the support body may e.g. steel and the cutting surface from surface hardening or e.g. hardfacing applied on the outer periphery of the support body, or different materials such as e.g. Carbide for the cutting surface, the cutting ring or the cutting segments and steel or the like. for the support body in question.
  • FIG. 1 is a greatly simplified schematic view of a top view of the machine head of a machine operating according to the undercutting principle with a plurality of roller bits according to the invention mounted on the machine head;
  • Fig. 2 shows the machine head of Figure 1 in side view, partially broken.
  • FIG. 3 shows a roller drilling tool according to the invention in a plan view of the end face
  • FIG. 4 shows a horizontal section through the roller drilling tool from FIG. 3;
  • FIG. 5 is a roller drilling tool according to a second embodiment in plan view of the cutting surface.
  • FIG. 6 shows a roller drilling tool with cutting segments according to a third embodiment
  • FIG. 7 shows a roller drilling tool according to a fourth exemplary embodiment in sectional view
  • FIG. 8 shows a roller drilling tool according to a fifth exemplary embodiment in sectional view
  • FIG 9 shows a roller drilling tool according to a sixth embodiment.
  • FIGS. 1 and 2 show a machine head 2, which rotates around the central axis 4 of the machine head 2 by means of the drive shaft 3, from an otherwise not further illustrated machine for mining materials such as rock on a dismantling front 1 shown schematically.
  • the machine head 2 can be mounted, for example, via the drive shaft 3 on a tunnel boring machine, a section boring machine, a part-cut or full-cut machine or a machine working with impact overlay.
  • the machine head 2 has three shaft head receptacles 5, in each of which a tool shaft 6 is mounted.
  • each tool shaft 6 At the free, on the front side 2 'protruding from the machine head 2 shaft end 7 of each tool shaft 6 is a generally designated by reference numeral 10 and according to the undercut principle ar- attached rotating roller drill rotatably attached.
  • the roller boring tools or roller bits 10 are unilaterally conical cutting discs with a cutting surface 12 which widens conically to the free end face 11 on the circumference.
  • the tool shafts 6 are rotatably mounted about the axis of rotation M of the tool shafts 6 in the receptacles 5 and the storage by means of two on the shaft of the tool shaft 6 fitting, via a sleeve 8 spaced radial bearings 30 and another, against the rear shaft end 7 'adjacent thrust bearing 31, which is counter-supported on a cover plate 32 which is fastened by means of a plurality of screws 33 on the back of the machine head 2 and the shaft receptacle 5 closes.
  • the tool shafts 6 can be taken out of the shaft seats 5 on the back of the machine heads 2.
  • the entire shaft seat 5 is protected by means of a shaft seal 59 against dirt and moisture.
  • the thrust bearing 31 ensures extremely favorable support of the tool shafts 6 at the rear shaft ends 7 'even at high axial forces, which may occur at the undercut blasting of material pieces 1' - as indicated in Fig. 2 - on the mining front 1.
  • the machine head 2 In operation, the machine head 2 is moved in the working direction A by pivot arms or a movement of the working machine. At the same time, the machine head 2 rotates about the central axis 4 in the direction of the arrow R (FIG. 1). Since the tool shafts 6 are mounted in a freely rotating manner, the roller bits 10 can also rotate about the central axis M, as a result of which the cutting surfaces 12, which are shown in FIG. 2 as cut black bars on the cut bit 10 shown, can wear uniformly over the circumference. Due to the rotational movement of the machine head 2 and the conical or wedge-shaped cutting surface 12 on the roller chisels 10, the material to be removed is removed in layers in the direction of the arrow A in an undercut manner. FIGS.
  • FIGS. 1 and 2 show the roller chisel 10 from FIGS. 1 and 2 in detail.
  • 3 shows a view of the machine head facing the bottom 13 with the conically widening to the outer periphery 14 cutting surface 12.
  • the chisel 10 has a solid, einstuckigen Stutzkorper 15 which is integral with a shaft head receptacle 16 for the free end of Tool shaft (7, Fig. 2) and centric to the central axis M with a central bore 17 for a fastening screw (9, Fig. 2) is provided to the Stutz body 15 rotatably connected to the shaft end of the tool shaft.
  • the Stutzkorper 15 which may in particular consist of steel, has a circumferentially cylindrical neck portion 18 which extends from the bottom 13 of the roller chisel 10.
  • the neck portion 18 merges integrally into a conically widening collar portion 19.
  • the cutting surface 12 is formed, which here consists of a surface hardening or a hard metal coating layer.
  • the cutting surface 12 preferably consists of a significantly more wear-resistant and harder material than the material of the supporting body 15.
  • the hard metal layer support or surface hardening forming the cutting surface 12 runs uniformly circumferentially over the outer circumferential wall 20 of the collar section 19.
  • the vertical side facing away from the wave head receptacle 16 Central axis M extending end face 11 of the roller chisel 10 is also provided with a central recess 21 which extends here over about one third of the axial length of the Stutzkorpers 15.
  • the narrow annular rib 22 has in the radial direction, ie perpendicular to the central axis M of the roller chisel 10, from the bottom 23 of the recess 21 to the end face 11 a constant web thickness.
  • the recess 21 forms a free space and causes or supports together with the different material pairing of harder cutting surface 12 and softer, stegformigen Stutzkorper 15 an independent resharpening of the cutting surface 12th Since the cutting surface 12 is in engagement with the material to be removed during the undercut removal, the cutting surface 12 wears off slowly, in particular at the peripheral edge 14.
  • Fig. 5 shows a roller bit 60 according to another exemplary embodiment.
  • the roller bit 60 has a one-piece Stutzkorper 65 with a conically widening to the outer edge 64 cutting surface 62.
  • Centrally on the underside of the Stutzkorpers 65 is in turn formed in a cylindrical neck portion 66, a shaft head receptacle 67 for the shaft end of a tool shaft.
  • the cutting surface 62 does not consist of an upper surface hardening or application layer, but the conically widening cutting surface 62 is formed by a plurality, here eg seventeen cutting segments, which are angeled on a conical outer peripheral wall of the supporting body 65 or fastened in some other way .
  • Each cutting segment 90 according to the invention has a significantly higher hardness than the material of the Stutzkorpers 65 and the Stutzkorper 65th has radially behind a collar portion, on whose conically widening outer peripheral wall, the cutting segments 90 are supported, an annular ridge, which is provided with a recess as a free space to achieve even with a cutting surfaces formed by 90 cutting surfaces 62 an independent Nachbulrf bin.
  • FIG. 6 there is shown another embodiment of a roller bit 110 having a solid, one-piece support body 115 integrally having a neck portion including the shaft head receiving means 116 and an adjoining and flared collar portion 119 centrally provided with a recess 121. so that on the back of the cutting surface 112 exclusively a ring land of constant thickness is formed as a supporting part of the support body 115.
  • the cutting surface 112 does not consist of a peripheral hardening but of individual cutting segments 140, which are soldered to the conically outwardly widening outer peripheral wall 120 of the annular web 122. Notwithstanding the previous embodiment, all cutting segments 140 are circumferentially covered with a cover layer 145 over the entire axial length of the cutting surface 112.
  • the cover layer 145 extends approximately from the cutting edge 114 at the transition of the cutting surface 112 in the end face 111 to the cylindrical periphery of the neck portion 118.
  • a continuous cover layer and one or more rings could rotate around the individual segments 140 to their anchoring to support the ring-web-like support body in the region of the collar portion 119.
  • the material of the cover layer 145 or of the rings is preferably substantially softer than the material of the cutting segments 140 as well as softer or at least as soft as the material of the support body 115.
  • the cover layer 145 may be soldered, for example.
  • a roller bit 210 is shown, in which a support body 215 again has a neck portion 218 and a conically widening collar portion 219, which due to a recess 221 in the end face 211 radially behind the cutting surface 212 is tapered to a ring land 222 with a conically extending outer circumferential wall 220 and parallel thereto extending inner peripheral wall 224.
  • the cutting surface 212 consists of a surface hardening, a soldered wear layer or applied cutting segments and is harder than the material of the support body in the annular web 222.
  • the rotationally fixed attachment of the Stauerköpers 215 at the shaft end 207 of a tool shaft 206 is effected here by means of a separate clamping plate 235, which by means of a Fixing screw 209 can be screwed against the shaft end 207.
  • the shaft end 207 is designed to be multi-stepped and has a blind hole 227 centrally and a step 228 on the outside.
  • At the outer step 228 of the shaft end 207 is provided with a cylindrical central bore 225 neck portion 218 of the support body 215 at.
  • the support body 215 can be pushed with its center bore 225 on the step 228 at the shaft end 207.
  • an inclined clamping surface 226 is formed, against which the clamping ring 235 is clamped with a counter-slope 236 at its periphery by tightening the screw 209.
  • the interaction of the two inclined clamping surfaces 226, 236 clamps the support ring 215 against the shaft end 207, so that it is rotatably and at the same time releasably secured to the tool shaft 206.
  • the material of the support body 215 is considerably softer than the material of the cutting surface 212, so that sets in conjunction with the recess 221 of the NachMrf bin on the cutting surface 212.
  • FIG. 8 shows a further exemplary embodiment of a roller bit 310 according to the invention, which can be fastened to a multi-stepped shaft end 307 of a tool shaft.
  • the roller bit 310 has a cutting ring 346, which has a cylindrical neck portion 347 and a conically outwardly web-shaped widening collar portion 348.
  • the collar portion 348 forms with its outer peripheral surface the cutting surface 312 for the undercut removal of rock.
  • the entire cutting ring 346 is made of a more wear-resistant material than a support body 315, which also forms the clamping piece for clamping the cutting ring 346 at the shaft end 307 by means of the fastening screw 309 at the roller bit 310.
  • the clamping Element-forming support body 315 a ring web outwardly flared collar portion 319, which merges into a bottom portion 375, which bounds the free space 321 within the inner peripheral wall 324 of the support body 315.
  • the support body 315 may be loose on the cutting ring 346 or be firmly connected thereto, but in the assembled state of the annular web collar portion 319 abuts with its outer peripheral wall 320 against the inner shell surface 348 'of the cutting ring 346 or pushes.
  • the rotationally fixed anchoring of the cutting ring 346 at the shaft end 307 is achieved via the interaction of a clamping bevel 326 at the shaft end 307 and a clamping bevel 336 at the transition of the underside of the cutting ring 346 in a central bore 325 of the cutting ring 346.
  • a clamping bevel 326 at the shaft end 307
  • a clamping bevel 336 at the transition of the underside of the cutting ring 346 in a central bore 325 of the cutting ring 346.
  • FIG. 9 shows a sixth exemplary embodiment of a roller bit 410, which in turn can be fastened in a rotationally fixed manner on a stepped shaft end 407 by means of a fastening screw 409.
  • the cutting surface 412 on a cutting ring 446 made of hard metal or the like. formed and is formed on the cutting ring 446 of the conically widening circumferential surface.
  • the locking of the cutting ring 446 at the shaft end 407 by means of a clamping washer 435, which has a clamping bevel 436 at the peripheral edge, which presses against a further clamping bevel 426 on the cutting ring 446.
  • the support body 415 consists only of an annular body with a parallelogram-shaped cross-section and mutually parallel outer circumferential wall 420 and inner circumferential wall 423.
  • the support ring is soldered or anchored to the inner peripheral surface 428 'of the web-shaped collar section 428 of the cutting ring 446.
  • the support ring 415 is made as thin as possible so as to make the cutting surface 412 integrally formed on the cutting ring 446 sturdy enough for the undercut process.
  • the material of the cutting surface should have a strength or hardness that is significantly higher than the material of the Stutzkorpers. The different degree of hardness can vary depending on the purpose. The use of steel for the Stutzkorper and by hardfacing applied hard metal for the cutting surface is only an example, without limiting the scope of protection on this.

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  • 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)
  • Finish Polishing, Edge Sharpening, And Grinding By Specific Grinding Devices (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Excavating Of Shafts Or Tunnels (AREA)
  • Drilling And Exploitation, And Mining Machines And Methods (AREA)

Abstract

A roller drill for removing material, such as in particular rock, minerals or the like, according to the undercutting principle, comprising a cutting face which is formed concentrically around a central axis and widens conically toward an end face of the roller drill, and includes a supporting body which is arranged on the inner side of the cutting face and extends up to the end face of the tool. In order to provide a roller drill or a roller bit of which the tool life or service life is improved compared with the prior art, the cutting face is made of a harder material than the supporting body and the supporting body forms an annular web which is conical at least at an outer circumferential wall and which defines with its inner circumferential wall a free space at the end face of the tool. The tool can resharpen itself automatically due to the free space and the dissimilar material combination.

Description

Titel: Rollenbohrwerkzeug oder RollenmeißelTitle: Roller Drilling Tool or Roller Chisel
Die Erfindung betrifft ein Rollenbohrwerkzeug oder einen Rollenmeißel zum Abtragen von Material wie insbesondere Gestein, Mineralien oder dgl . nach dem Hinterschneidprinzip, mit einer konzentrisch um eine Mittelachse herum ausgebildeten, sich konisch zur Stirnseite des Rollenbohrwerkzeugs erweiternden Schneidfläche und mit einem Stützkörper, der an der Innenseite der Schneidfläche angeordnet ist und sich bis zur Stirnseite des Werkzeuges erstreckt.The invention relates to a roller drill or a roller chisel for removing material such as rocks, minerals or the like. according to the undercutting principle, with a concentrically around a central axis formed around, conically widening to the end face of the roller drilling tool cutting surface and with a support body which is arranged on the inside of the cutting surface and extends to the front side of the tool.
Im Stand der Technik sind unterschiedliche Arten von Schneidsystemen bekannt, mit denen im Bereich des Bergbaus und des Straßenbaus mittels Rollenbohrwerkzeugen oder Rollenmeißeln nach dem Hinterschneidprinzip gearbeitet werden kann. Rollenbohrwerkzeuge oder Rollenmeißel, die nach dem Hinterschneidprinzip arbeiten, kennzeichnen sich durch einseitige, konische Werkzeugkörper oder Disken, die an Bohrköpfen oder Werkzeugarmen von z.B. Steckenvortriebsmaschinen derart montiert sind, dass sich die Rollenbohrwerkzeuge um ihre Mittelachse herum frei drehen können. Das Abtragen des Materials wie insbesondere Gestein, Hartgestein oder Mineraliengestein, nach dem Hinterschneidprinzip erfolgt in dünnen Schichten. Das Material wird mit den konisch sich vom Bohrkopf ausgehend erweiternden und das Gestein in dünnen Schichten hinterschneidend lösenden Schneidflächen in meist handtellergroßen Stücken herausgebrochen. Um eine hohe Abtragsleistung zu erzielen, werden meist mehrere Rollenmeißel oder Rollenbohrwerkzeuge an einem rotierbaren und/oder mit Schlagüberlagerung schnell drehend angetriebenen Bohrkopf gelagert (vgl. z.B. DE 198 38 195 El oder WO 92/10647) .In the prior art, different types of cutting systems are known, which can be used in the field of mining and road construction by means of roller drilling tools or roller bits on the undercut principle. Roller drilling tools or roller bits operating on the undercutting principle are characterized by unilateral conical tool bodies or discs which are attached to drill heads or tool arms of e.g. Plug driving machines are mounted such that the roller drilling tools can rotate freely about its central axis. The removal of the material, in particular rock, hard rock or mineral rock, according to the undercutting principle takes place in thin layers. The material is broken out with the conical widening from the drill head and the rock in thin layers undercutting releasing cutting surfaces in mostly palm-sized pieces. In order to achieve a high removal rate, a plurality of roller bits or roller drilling tools are usually mounted on a rotary head which is rotatable and / or rotationally driven with impact superposition (cf., for example, DE 198 38 195 A1 or WO 92/10647).
Da die nach dem Hinterschneidprinzip arbeitenden Rollenbohrwerkzeuge oder Rollenmeißel mit nur einseitig ausgebildeten, konisch sich erweiternden Schneidflächen schräg an der abzubauenden Gesteinsfront angesetzt werden, sind die Schneidflächen der Rollenmeißel und ins- besondere die Schneidkante am Übergang der Schneidfläche in die Stirnseite systembedingt hohen Axialkräften ausgesetzt. Die Axialkräfte wiederum bewirken insbesondere an der Schneidkante am freien Rand der Schneidfläche einen systembedingten schnellen Verschleiß der einzelnen Rollenmeißel.Since the roller drilling tools or roller bits working according to the undercutting principle are attached obliquely to the stone front to be dismantled with conically widening cutting surfaces formed only on one side, the cutting surfaces of the roller bits and in particular special exposed the cutting edge at the transition of the cutting surface in the front side systemic high axial forces. The axial forces in turn, in particular at the cutting edge at the free edge of the cutting surface cause a system-related rapid wear of the individual roller bits.
Aufgabe der Erfindung ist es, ein Rollenbohrwerkzeug bzw. einen Rollenmeißel zu schaffen, dessen Standzeit bzw. Einsatzdauer gegenüber dem Stand der Technik verbessert ist.The object of the invention is to provide a roller drilling tool or a roller chisel, the service life or service life is improved over the prior art.
Diese Aufgabe wird erfindungsgemäß dadurch gelöst, dass die Schneidfläche aus härterem Material als der Stützkörper besteht und dass der Stützkörper einen Ringsteg bildet, der zumindest an seiner Au- ßenumfangswand konisch verläuft und der mit seiner Innenumfangswand einen Freiraum an der Stirnseite des Werkzeuges begrenzt. Durch das Zusammenspiel der unterschiedlichen Materialpaarung von gehärteter bzw. härterer Schneidfläche und weicherem Stützkörper einerseits sowie dem Freiraum im Stützbereich des Stützkörpers, d.h. radial betrachtet jeweils hinter der Schneidfläche, andererseits wird erreicht, dass sich, über einen vergleichsweise langen Zeitraum, die Schneidkante am Übergang der Schneidfläche in die Stirnseite selbstständig nachschärfen kann. Der Selbstnachschärfeffekt wird insbesondere dadurch erreicht, dass bei einer Abnutzung der gehärteten Schneidfläche auch das dahinter befindliche weichere Material des Stützkörpers durch das abzutragende Gestein weggeschlissen wird, wodurch im Wesentlichen permanent nur die gehärtete Schneidfläche im Kontakteingriff mit dem abzutragenden Material steht.This object is achieved in that the cutting surface made of a harder material than the support body and that the support body forms an annular web which extends conically at least on its outer ßenumfangswand and bounds with its inner peripheral wall a free space on the end face of the tool. Due to the interaction of the different material combination of hardened or harder cutting surface and softer support body on the one hand and the free space in the support region of the support body, i. viewed radially behind the cutting surface, on the other hand, it is achieved that, over a comparatively long period of time, the cutting edge at the transition of the cutting surface into the front side can independently re-sharpen. The Selbstnachschärfeffekt is achieved in particular by the fact that with a wear of the hardened cutting surface and the underlying behind the softer material of the support body is weggeschlissen by the stone to be removed, whereby substantially permanently only the hardened cutting surface is in contact engagement with the material to be ablated.
Um den erfindungsgemäßen Effekt des selbstständigen Nachschärfens des Werkzeuges zu erreichen, ist nicht unbedingt erforderlich, dass der Freiraum als Hohlraum oder dgl . ausgebildet ist; der Freiraum in Radialrichtung hinter dem Stützkörper könnte auch mit nochmals weicherem Material als das Material des Stützkörpers gefüllt sein. Bei der insbesondere bevorzugten Ausgestaltung ist allerdings der Freiraum im Rücken des Stützkörpers als hohle Vertiefung ausgebildet. Besonders vorteilhaft ist, wenn sich der Freiraum von der Stirnseite des Werkzeuges aus zumindest partiell über die Axialausdehnung der Schneidflache des Werkzeuges erstreckt. Je tiefer der Freiraum in Axialrichtung ausgebildet ist, desto großer ist die effektive axiale Lange der Schneidflache, bei welcher ein selbststandiges Nachscharfen der Schneidkante des Rollenmeißels erreicht werden kann. Im Hohlraum hinter dem Stutzkorper kann sich das weggeschlissene Material des Stutzkorpers außerdem vorübergehend ansammeln.In order to achieve the inventive effect of the self-sharpening of the tool, it is not absolutely necessary that the space as a cavity or the like. is trained; the clearance in the radial direction behind the support body could also be filled with even softer material than the material of the support body. In the particularly preferred embodiment, however, the free space in the back of the support body is formed as a hollow depression. It is particularly advantageous if the free space from the end face of the tool at least partially over the axial extent of the Cutting surface of the tool extends. The deeper the free space is formed in the axial direction, the greater the effective axial length of the cutting surface, in which a self-resharpening of the cutting edge of the roller bit can be achieved. In the cavity behind the Stutzkorper the weggeschlissene material of the Stutzkorpers can also temporarily accumulate.
Bei der insbesondere bevorzugten Ausgestaltung weist der Ringsteg zwischen seiner Innenumfangswand und seiner Außenumfangswand eine exakt konstante oder im Wesentlichen konstante Dicke auf. Diese Ausgestaltung hat den Vorteil, dass das Rollenbohrwerkzeug über seine gesamte Einsatzdauer beim Nachscharfen gleiche Ruckstellkrafte in die Maschine, an der die Rollenbohrwerkzeuge zum Einsatz kommen, einbringt, da unabhängig vom Abnutzungsgrad, mithin von der axialen Verkürzung der Schneidflache aus gehärtetem Material, derselbe Querschnitt aus weicherem Stutzkorpermaterial weggeschleißt werden muss, um zu erreichen, dass ausschließlich die Schneidkante aus härterem Material in Wirkeingriff mit dem abzutragenden Gestein steht. Zweck- maßigerweise verlauft hierzu die Innenumfangswand konisch, wodurch der Freiraum bzw. die Vertiefung sich ebenfalls zum Grund des Freiraums hin konisch verjungt. Gemäß einer vorteilhaften Ausgestaltung können der Konuswinkel der Innenumfangswand und der Konuswinkel der Schneidflache exakt gleich sein. Je nach verwendeter Materialpaarung kann es ausreichen, wenn die Stegdicke des Ringstegs nur annähernd konstant ist. Hierbei können vorteilhafterweise der Konuswinkel der Innenumfangswand und der Konuswinkel der Schneidflache um weniger als 8°, insbesondere weniger als 5°, vorzugsweise weniger als 2° voneinander abweichen. Je nach verwendeter Materialpaarung kann auch die Stegdicke variieren, wobei in der Regel die Stegdicke meist zwei- bis zehnfach dicker ausgeführt werden wird als die radiale Dicke der Schneidflache. Insgesamt sollte die Stegdicke so dünn wie möglich ausgeführt werden, um das zugleich weichere Material schnell wegschleißen zu können.In the particularly preferred embodiment, the annular web between its inner peripheral wall and its outer peripheral wall to an exactly constant or substantially constant thickness. This embodiment has the advantage that the roller drilling tool over its entire service life when repositioning the same restoring forces in the machine on which the roller drilling tools are used, as regardless of the degree of wear, thus from the axial shortening of the cutting surface of hardened material, the same cross section soft Stutzkorpermaterial must be weggeschleißt to achieve that only the cutting edge of harder material is in operative engagement with the ablated rock. For this purpose, the inner circumferential wall expediently runs conically, as a result of which the free space or the depression likewise tapers conically towards the bottom of the free space. According to an advantageous embodiment, the cone angle of the inner peripheral wall and the cone angle of the cutting surface can be exactly the same. Depending on the material pairing used, it may be sufficient if the web thickness of the annular web is only approximately constant. In this case, the cone angle of the inner peripheral wall and the cone angle of the cutting surface can advantageously deviate from one another by less than 8 °, in particular less than 5 °, preferably less than 2 °. Depending on the material pairing used, the web thickness can also vary, with the web thickness usually being usually two to ten times thicker than the radial thickness of the cutting surface. Overall, the web thickness should be as thin as possible to be able to wear away the softer material at the same time.
Erfindungsgemaße Rollenmeißel oder Rollenbohrwerkzeuge mit geharteten, radial mittels ringförmiger Stutzkorper abgestutzten Schneidflachen können unterschiedlich aufgebaut sein. Gemäß einer vorteil- haften Ausgestaltung weist der Stutzkorper einen zylindrischen Hals¬ abschnitt und einen konischen, den Ringsteg bildenden Kragenabschnitt auf. Die Schneidflache kann dann bei einer Ausfuhrungsform aus einer an der konisch verlaufenden Außenumfangswand des Ringstegs aufgebrachten Oberflachenhartung oder Hartschicht bestehen. Alternativ kann die Schneidflache aus an der konisch verlaufenden Außenumfangswand des Ringstegs befestigten Schneidsegmenten oder Hartmetallsegmenten bestehen. Die Schneidsegmente oder Hartmetallsegmente können an der Außenumfangswand des Ringstegs des Stutzkorpers befestigt, insbesondere angelotet oder aufgelotet sein. Die Verwendung von Schneidsegmenten hat den Vorteil, dass die konzentrisch umlaufende Schneidflache relativ einfach hergestellt werden kann. Um selbst bei höchsten axialen Belastungen entsprechende Schneidsegmente oder Hartmetallsegmente vor Beschädigungen durch Stoßbelastung oder Ausbrechen zu schützen, können die Schneidsegmente oder Hartmetallsegmente mittels wenigstens eines Rings oder einer Decklage bedeckt sein, die aus weicherem Material als die Schneidflache besteht. Ein entsprechender Ring oder eine entsprechende Decklage sorgen mithin für eine zusatzliche Fixierung der Schneidsegmente und damit der Schneidflache am Stutzkorper. Das Material des Rings oder der Decklage ist zweckmaßigerweise auch weicher als das Material des Ringstegs, um den Nachscharfeffekt des erfindungsgemaßen Werkzeuges nicht negativ zu beeinflussen.Roller bits according to the invention or roller drilling tools with hardened, radially truncated by means of annular Stutzkorper cutting surfaces can be constructed differently. According to an advantageous Adhere configuration, the Stutzkorper a cylindrical neck ¬ section and a conical, the ring land forming collar portion. In one embodiment, the cutting surface may consist of a surface hardening or hard layer applied to the conically extending outer circumferential wall of the annular web. Alternatively, the cutting surface may consist of cutting segments or hard metal segments attached to the conically extending outer circumferential wall of the annular web. The cutting segments or hard metal segments can be attached to the outer peripheral wall of the annular web of the Stutzkorpers, in particular be angelotet or soldered. The use of cutting segments has the advantage that the concentric circumferential cutting surface can be produced relatively easily. In order to protect corresponding cutting segments or hard metal segments from damage due to impact loading or breaking even at high axial loads, the cutting segments or hard metal segments may be covered by at least one ring or a cover layer, which consists of softer material than the cutting surface. A corresponding ring or a corresponding cover layer thus ensure an additional fixation of the cutting segments and thus the cutting surface on the Stutzkorper. The material of the ring or the cover layer is expediently also softer than the material of the annular web in order not to negatively influence the retightening effect of the inventive tool.
Gemäß einer alternativen Ausfuhrungsform kann die Schneidfläche Bestandteil eines Schneidrings sein, der einen zylindrischen Halsabschnitt und einen konischen Kragenabschnitt aufweist, an dessen Innenseite der Stutzkorper anliegt oder ausgebildet ist. Der gesamte Schneidring kann dann aus Hartmetall oder anderem verschleißfesten Material bestehen. Um entsprechende Rollenbohrwerkzeuge an Werkzeugwellen der Maschinenkopfe von Arbeitsmaschinen für die Materialabtragung auf einfache Weise befestigen zu können, weisen bei einer Ausfuhrungsform der Schneidring oder der Stutzkorper am Innenmantel des Halsabschnitts eine Anschragung für eine mit dieser zusammenwirkenden und mit einer Werkzeugwelle losbar verbindbaren Klemmscheibe auf. Hierbei kann der Halsabschnitt zugleich mit einer Wellenkopf- aufnahme zur vorzugsweise drehfesten Aufnahme eines Wellenendes ei- ner Werkzeugwelle versehen sein. Die Kleiranscheibe kann auch einen Klemmkragen mit Anschrägung aufweisen und mittels einer Schraube mit einem Wellenende einer Werkzeugwelle verbindbar sein. Weiter alternativ kann der Stützkörper mit seinem Ringsteg lösbar an der Innenseite des Schneidringes anliegen und einen integral mit dem Ringsteg verbundenen Boden aufweisen, der axial gegen den Halsabschnitt des Schneidrings mittels eines ins Wellenende einer Werkzeugwelle einschraubbaren Schraubmittels anklemmbar ist.According to an alternative embodiment, the cutting surface may be part of a cutting ring having a cylindrical neck portion and a conical collar portion, on the inside of the Stutzkorper rests or is formed. The entire cutting ring can then consist of hard metal or other wear-resistant material. In order to fasten appropriate roller drilling tools on tool shafts of machine heads of machines for material removal in a simple way, have in one embodiment of the cutting ring or Stutzkorper on the inner surface of the neck portion a Anankagung for interacting with this and releasably connectable with a tool shaft clamping disc. In this case, the neck section can at the same time be provided with a shaft head receptacle for preferably rotationally fixed reception of a shaft end of a shaft end. ner tool shaft be provided. The Kleiranscheibe may also have a clamping collar with bevel and be connected by a screw with a shaft end of a tool shaft. Further alternatively, the support body with its annular web detachably abut against the inside of the cutting ring and having an integrally connected to the annular web floor, which can be clamped axially against the neck portion of the cutting ring by means of a screwed into the shaft end of a tool shaft screwing means.
Die erfindungsgemäßen Rollenbohrwerkzeuge oder Rollenmeißel können besonders vorteilhaft mit dem einen Wellenende einer Werkzeugwelle verbunden sein, die mittels zweier am Umfang eines Wellenschaftes der Werkzeugwelle angeordneter Lager sowie einem das andere, freie Wellenende axial abstützenden Axiallager in einer Wellenaufnahme eines Maschinenkopfes abgestützt sind. Eine entsprechende Lagerung der Werkzeugwellen für Rollenbohrwerkzeuge an Maschinenköpfen ist von eigenständiger erfinderischer Bedeutung und auch bei Rollenbohrwerkzeugen einsetzbar, die einstückige Schneidflächen aus einem einzigen Material bzw. einem Material mir einheitlicher Härte aufweisen.The roller drilling tools or roller bits according to the invention can be particularly advantageously connected to one shaft end of a tool shaft, which are supported by means of two arranged on the circumference of a shaft shaft of the tool shaft bearing and the other, free shaft end axially supporting thrust bearing in a shaft receiving a machine head. A corresponding storage of the tool shafts for roller drilling tools on machine heads is of independent inventive importance and can also be used in roller drilling tools that have integral cutting surfaces made of a single material or a material with uniform hardness.
Der Stützkörper kann z.B. aus Stahl und die Schneidfläche aus einer Oberflächenhärtung oder einer z.B. durch Auftragsschweißung aufgebrachten Hartschicht am Außenumfang des Stützkörpers bestehen, oder es kommen von vornherein unterschiedliche Materialien wie z.B. Hartmetall für die Schneidfläche, den Schneidring oder die Schneidsegmente sowie Stahl oder dgl . für den Stützkörper in Frage.The support body may e.g. steel and the cutting surface from surface hardening or e.g. hardfacing applied on the outer periphery of the support body, or different materials such as e.g. Carbide for the cutting surface, the cutting ring or the cutting segments and steel or the like. for the support body in question.
Weitere Vorteile und Ausgestaltungen der Erfindung ergeben sich aus der nachfolgenden Beschreibung von in der Zeichnung schematisch gezeigten Ausführungsbeispielen für erfindungsgemäße Rollenbohrwerkzeuge oder Rollenmeißel. In der Zeichnung zeigen:Further advantages and embodiments of the invention will become apparent from the following description of exemplary embodiments shown schematically in the drawing for roller drilling tools or roller bits according to the invention. In the drawing show:
Fig. 1 schematisch stark vereinfacht eine Draufsicht auf den Maschinenkopf einer nach dem Hinterschneidprinzip arbeitenden Maschine mit mehreren, am Maschinenkopf gelagerten erfindungsgemäßen Rollenmeißeln; Fig. 2 den Maschinenkopf aus Fig. 1 in Seitenansicht, teilweise aufgebrochen;1 is a greatly simplified schematic view of a top view of the machine head of a machine operating according to the undercutting principle with a plurality of roller bits according to the invention mounted on the machine head; Fig. 2 shows the machine head of Figure 1 in side view, partially broken.
Fig. 3 ein erfindungsgemäßes Rollenbohrwerkzeug in Draufsicht auf die Stirnseite;3 shows a roller drilling tool according to the invention in a plan view of the end face;
Fig. 4 einen Horizontalschnitt durch das Rollenbohrwerkzeug aus Fig. 3;4 shows a horizontal section through the roller drilling tool from FIG. 3;
Fig. 5 ein Rollenbohrwerkzeug gemäß einem zweiten Ausführungsbeispiel in Draufsicht auf die Schneidfläche;5 is a roller drilling tool according to a second embodiment in plan view of the cutting surface.
Fig. 6 ein Rollenbohrwerkzeug mit Schneidsegmenten gemäß einem dritten Ausführungsbeispiel;6 shows a roller drilling tool with cutting segments according to a third embodiment;
Fig. 7 ein Rollenbohrwerkzeug gemäß einem vierten Ausführungsbeispiel in Schnittansicht;7 shows a roller drilling tool according to a fourth exemplary embodiment in sectional view;
Fig. 8 ein Rollenbohrwerkzeug gemäß einem fünften Ausführungsbeispiel in Schnittansicht; und8 shows a roller drilling tool according to a fifth exemplary embodiment in sectional view; and
Fig. 9 ein Rollenbohrwerkzeug gemäß einem sechsten Ausführungsbeispiel.9 shows a roller drilling tool according to a sixth embodiment.
Die Figuren 1 und 2 zeigen von einer ansonsten nicht weiter dargestellten Maschine zum Abbau von Materialien wie Gestein an einer schematisch dargestellten Abbaufront 1 einen Maschinenkopf 2, der mittels der Antriebswelle 3 um die Zentralachse 4 des Maschinenkopfes 2 rotiert. Der Maschinenkopf 2 kann beispielsweise über die Antriebswelle 3 an einer Tunnelvortriebsmaschine, einer Streckenvortriebsmaschine, einer Teilschnitt- oder Vollschnittmaschine oder einer mit Schlagüberlagerung arbeitenden Maschine gelagert sein. Im gezeigten Ausführungsbeispiel weist der Maschinenkopf 2 drei Wellen- kopfaufnahmen 5 auf, in denen jeweils eine Werkzeugwelle 6 gelagert ist. Am freien, an der Frontseite 2' aus dem Maschinenkopf 2 herausragenden Wellenende 7 jeder Werkzeugwelle 6 ist ein insgesamt mit Bezugszeichen 10 bezeichnetes und nach dem Hinterschneidprinzip ar- beitendes Rollenbohrwerkzeug drehfest befestigt. Wie schon in Fig. 2 gut zu erkennen ist, handelt es sich bei den Rollenbohrwerkzeugen bzw. Rollenmeißeln 10 um einseitig konische Schneiddisken mit einer sich konisch zur freien Stirnseite 11 erweiternden Schneidfläche 12 am Umfang. Die Werkzeugwellen 6 sind um die Drehachse M der Werkzeugwellen 6 drehbar in den Aufnahmen 5 gelagert und die Lagerung erfolgt mittels zwei am Schaft der Werkzeugwelle 6 anliegender, über eine Hülse 8 voneinander beabstandeter Radiallager 30 sowie eines weiteren, gegen das hintere Wellenende 7' anliegenden Axiallagers 31, das an einer Deckelplatte 32 gegengelagert ist, die mittels mehrere Schrauben 33 an der Rückseite des Maschinenkopfes 2 befestigt ist und die Wellenaufnahme 5 verschließt. Bei demontierten Rollenmeißeln 10 und demontiertem Sicherungsring 34 können die Werkzeugwellen 6 aus den Wellenaufnahmen 5 an der Rückseite der Maschinenköpfe 2 herausgenommen werden. Das in Fig. 2 obere Radiallager 30 bildet ein Loslager und das untere Radiallager 30 ein Festlager. Die gesamte Wellenaufnahme 5 ist mittels einer Wellendichtung 59 gegen Schmutz- und Feuchtigkeitseintritt geschützt. Das Axiallager 31 sorgt für eine äußerst günstige Abstützung der Werkzeugwellen 6 an den hinteren Wellenenden 7' selbst bei hohen Axialkräften, die beim hinterschneidenden Absprengen von Materialstücken 1' - wie in Fig. 2 angedeutet - an der Abbaufront 1 auftreten können.FIGS. 1 and 2 show a machine head 2, which rotates around the central axis 4 of the machine head 2 by means of the drive shaft 3, from an otherwise not further illustrated machine for mining materials such as rock on a dismantling front 1 shown schematically. The machine head 2 can be mounted, for example, via the drive shaft 3 on a tunnel boring machine, a section boring machine, a part-cut or full-cut machine or a machine working with impact overlay. In the exemplary embodiment shown, the machine head 2 has three shaft head receptacles 5, in each of which a tool shaft 6 is mounted. At the free, on the front side 2 'protruding from the machine head 2 shaft end 7 of each tool shaft 6 is a generally designated by reference numeral 10 and according to the undercut principle ar- attached rotating roller drill rotatably attached. As can already be clearly seen in FIG. 2, the roller boring tools or roller bits 10 are unilaterally conical cutting discs with a cutting surface 12 which widens conically to the free end face 11 on the circumference. The tool shafts 6 are rotatably mounted about the axis of rotation M of the tool shafts 6 in the receptacles 5 and the storage by means of two on the shaft of the tool shaft 6 fitting, via a sleeve 8 spaced radial bearings 30 and another, against the rear shaft end 7 'adjacent thrust bearing 31, which is counter-supported on a cover plate 32 which is fastened by means of a plurality of screws 33 on the back of the machine head 2 and the shaft receptacle 5 closes. With disassembled roller bits 10 and disassembled locking ring 34, the tool shafts 6 can be taken out of the shaft seats 5 on the back of the machine heads 2. The upper radial bearing 30 in FIG. 2 forms a loose bearing and the lower radial bearing 30 forms a fixed bearing. The entire shaft seat 5 is protected by means of a shaft seal 59 against dirt and moisture. The thrust bearing 31 ensures extremely favorable support of the tool shafts 6 at the rear shaft ends 7 'even at high axial forces, which may occur at the undercut blasting of material pieces 1' - as indicated in Fig. 2 - on the mining front 1.
Im Betriebseinsatz wird der Maschinenkopf 2 in Arbeitsrichtung A durch Schwenkarme oder eine Bewegung der Arbeitsmaschine bewegt. Gleichzeitig rotiert der Maschinenkopf 2 um die zentrale Achse 4 in Pfeilrichtung R (Fig. 1) . Da die Werkzeugwellen 6 freidrehend gelagert sind, können sich auch die Rollenmeißel 10 um die Mittelachse M drehend bewegen, wodurch sich die Schneidflächen 12, welche in Fig. 2 am geschnitten dargestellten Rollenmeißel 10 als schwarze Balken dargestellt sind, gleichmäßig über den Umfang abnutzen können. Durch die Rotationsbewegung des Maschinenkopfes 2 und die konische bzw. keilförmige Schneidfläche 12 an den Rollenmeißeln 10 wird das abzutragende Material schichtweise in Richtung des Pfeils A hinterschneidend abgetragen. Die Figuren 3 und 4 zeigen den Rollenmeißel 10 aus den Figuren 1 und 2 im Detail. Fig. 3 bildet eine Ansicht auf die im Betriebseinsatz dem Maschinenkopf zugewandt liegende Unterseite 13 mit der konisch sich zum Außenumfang 14 erweiternden Schneidflache 12. Der Rollenmeißel 10 weist einen massiven, einstuckigen Stutzkorper 15 auf, der integral mit einer Wellenkopfaufnahme 16 für das freie Ende der Werkzeugwelle (7, Fig. 2) sowie zentrisch zur Mittelachse M mit einer Zentralbohrung 17 für eine Befestigungsschraube (9, Fig. 2) versehen ist, um den Stutzkorper 15 drehfest mit dem Wellenende der Werkzeugwelle zu verbinden. Der Stutzkorper 15, der insbesondere aus Stahl bestehen kann, weist einen am Umfang zylindrischen Halsabschnitt 18 auf, der sich von der Unterseite 13 des Rollenmeißels 10 erstreckt. Der Halsabschnitt 18 geht integral in einen sich konisch erweiternden Kragenabschnitt 19 über. An der konischen Außenumfangs- wand 20 des Kragenabschnitts 19 des Stutzkorpers 15 ist die Schneidflache 12 ausgebildet, die hier aus einer Oberflachenhartung oder einer Hartmetall-Auftragsschicht besteht. Die Schneidflache 12 besteht erfindungsgemaß aus vorzugsweise deutlich verschleißfesterem und härterem Material als das Material des Stutzkorpers 15. Die die Schneidflache 12 bildende Hartmetallschichtauflage oder Oberflachen- verhartung verlauft gleichmaßig umlaufend über die Außenumfangswand 20 des Kragenabschnitts 19. Die der Wellenkopfaufnahme 16 abgewandt liegende, senkrecht abgewinkelt zur Mittelachse M verlaufende Stirnseite 11 des Rollenmeißels 10 ist zugleich mit einer zentralen Vertiefung 21 versehen, die sich hier über etwa ein Drittel der Axiallange des Stutzkorpers 15 erstreckt. Die Vertiefung 21, die beispielsweise aus einer Eindrehung an der Stirnseite 11 des Stutzkorpers 15 oder einer anders hergestellten Aussparung bestehen kann, bildet einen Freiraum, der den Querschnitt des vom Stutzkorper 19 an der Stirnseite 11 bereitgestellten Materials auf einen schmalen Ringsteg 22 begrenzt. Der schmale Ringsteg 22 weist in Radialrichtung, d.h. senkrecht zur Mittelachse M des Rollenmeißels 10, vom Grund 23 der Vertiefung 21 bis zur Stirnseite 11 eine gleichbleibende Stegdicke auf. Die Vertiefung 21 bildet einen Freiraum und bewirkt bzw. unterstutzt zusammen mit der unterschiedlichen Materialpaarung von härterer Schneidflache 12 und weicherem, stegformigen Stutzkorper 15 ein selbststandiges Nachscharfen der Schneidflache 12 des Rollenmeißels 10. Da sich die Schneidflache 12 beim hinterschneidenden Abtragen in Eingriff mit dem abzutragenden Material befindet, nutzt sich die Schneidflache 12 insbesondere an der Randkante 14 langsam ab. Sobald sich allerdings die Schneidkante 14 abgenutzt hat, wird auch das wesentlich weichere Material des Stutzkor- pers an der Stirnseite 11 durch das abzubauende Material sofort weggeschlissen, weswegen immer eine sauber abgewinkelte und gehartete Schneidkante 14 am Übergang der Schneidflache 12 in die Stirnseite 11 in Wirkeingriff mit dem abzutragenden Material steht. Dieser selbststandige Nachscharfeffekt stellt sich bis zu der in Fig. 4 angedeuteten Verschleißgrenzlinie V ein, welche sich geringfügig oberhalb des Grundes 23 der Vertiefung 21 befindet und bis zu welcher jeder Rollenmeißel 10 bei im Wesentlichen gleichbleibenden Ruck- stellkraften, die in den Maschinenkopf eingeleitet werden, abgenutzt werden kann. Die gleichbleibende radiale Wandstarke des Ringstegs 22 wird beim Rollenmeißel 10 in Fig. 3 und 4 im Wesentlichen dadurch unterstutzt, dass die Innenumfangswand 24 des als Ringsteg 22 ausgebildeten Kragenabschnitts 19 des Stutzkorpers 15 im Wesentlichen mit dem gleichen Konus- oder Schragenwinkel zur Mittelachse M verlauft wie die Schneidflache 12 sowie die Außenumfangswand 20. Der Konusoder Schragenwinkel betragt im gezeigten Ausfuhrungsbeispiel etwa 45°.In operation, the machine head 2 is moved in the working direction A by pivot arms or a movement of the working machine. At the same time, the machine head 2 rotates about the central axis 4 in the direction of the arrow R (FIG. 1). Since the tool shafts 6 are mounted in a freely rotating manner, the roller bits 10 can also rotate about the central axis M, as a result of which the cutting surfaces 12, which are shown in FIG. 2 as cut black bars on the cut bit 10 shown, can wear uniformly over the circumference. Due to the rotational movement of the machine head 2 and the conical or wedge-shaped cutting surface 12 on the roller chisels 10, the material to be removed is removed in layers in the direction of the arrow A in an undercut manner. FIGS. 3 and 4 show the roller chisel 10 from FIGS. 1 and 2 in detail. 3 shows a view of the machine head facing the bottom 13 with the conically widening to the outer periphery 14 cutting surface 12. The chisel 10 has a solid, einstuckigen Stutzkorper 15 which is integral with a shaft head receptacle 16 for the free end of Tool shaft (7, Fig. 2) and centric to the central axis M with a central bore 17 for a fastening screw (9, Fig. 2) is provided to the Stutz body 15 rotatably connected to the shaft end of the tool shaft. The Stutzkorper 15, which may in particular consist of steel, has a circumferentially cylindrical neck portion 18 which extends from the bottom 13 of the roller chisel 10. The neck portion 18 merges integrally into a conically widening collar portion 19. On the conical outer circumferential wall 20 of the collar portion 19 of the supporting body 15, the cutting surface 12 is formed, which here consists of a surface hardening or a hard metal coating layer. According to the invention, the cutting surface 12 preferably consists of a significantly more wear-resistant and harder material than the material of the supporting body 15. The hard metal layer support or surface hardening forming the cutting surface 12 runs uniformly circumferentially over the outer circumferential wall 20 of the collar section 19. The vertical side facing away from the wave head receptacle 16 Central axis M extending end face 11 of the roller chisel 10 is also provided with a central recess 21 which extends here over about one third of the axial length of the Stutzkorpers 15. The recess 21, which may consist for example of a recess on the end face 11 of the Stutzkorpers 15 or a differently prepared recess, forms a free space which limits the cross section of the Stutzkorper 19 provided on the end face 11 material on a narrow annular web 22. The narrow annular rib 22 has in the radial direction, ie perpendicular to the central axis M of the roller chisel 10, from the bottom 23 of the recess 21 to the end face 11 a constant web thickness. The recess 21 forms a free space and causes or supports together with the different material pairing of harder cutting surface 12 and softer, stegformigen Stutzkorper 15 an independent resharpening of the cutting surface 12th Since the cutting surface 12 is in engagement with the material to be removed during the undercut removal, the cutting surface 12 wears off slowly, in particular at the peripheral edge 14. However, as soon as the cutting edge 14 has worn away, the much softer material of the support body at the end face 11 is immediately scrapped away by the material to be degraded, which is why a cleanly angled and hardened cutting edge 14 is in operative engagement at the transition of the cutting surface 12 into the end face 11 stands with the material to be removed. This self-adjusting effect adjusts itself to the wear limit line V indicated in FIG. 4, which is located slightly above the bottom 23 of the depression 21 and up to which each roller chisel 10 is provided with essentially constant jerk forces introduced into the machine head. can be worn out. The constant radial wall thickness of the annular ridge 22 is supported in the roller chisel 10 in FIGS. 3 and 4 essentially in that the inner circumferential wall 24 of the annular section 22 formed as a collar portion 19 of the Stutzkorpers 15 substantially at the same cone or Schragenwinkel to the central axis M proceeds as the cutting surface 12 and the outer peripheral wall 20. The cone or angle angle is approximately 45 ° in the exemplary embodiment shown.
Fig. 5 zeigt einen Rollenmeißel 60 gemäß einem weiteren Ausfuhrungsbeispiel. Wie beim vorherigen Ausfuhrungsbeispiel hat der Rollenmeißel 60 einen einstuckigen Stutzkorper 65 mit einer konisch sich zur Außenkante 64 erweiternden Schneidflache 62. Zentral an der Unterseite des Stutzkorpers 65 ist wiederum in einem zylindrischen Halsabschnitt 66 eine Wellenkopfaufnahme 67 für das Wellenende einer Werkzeugwelle ausgebildet. Abweichend vom vorherigen Ausfuhrungsbeispiel besteht allerdings die Schneidflache 62 nicht aus einer Ober- flachenhartung oder Auftragsschicht, sondern die konisch sich erweiternde Schneidflache 62 wird mittels mehrerer, hier z.B. siebzehn Schneidsegmenten gebildet, die an einer konischen Außenumfangswand des Stutzkorpers 65 angelotet oder auf andere Weise befestigt sind. Jedes Schneidsegment 90 hat erfindungsgemaß eine deutlich höhere Harte als das Material des Stutzkorpers 65 und der Stutzkorper 65 weist radial hinter einem Kragenabschnitt, an dessen konisch sich erweiternden Außenumfangswand die Schneidsegmente 90 abgestützt werden, einen Ringsteg auf, der mit einer Vertiefung als Freiraum versehen ist, um auch bei einer von Schneidsegmenten 90 gebildeten Schneidfläche 62 einen selbstständigen Nachschärfeffekt zu erreichen.Fig. 5 shows a roller bit 60 according to another exemplary embodiment. As in the previous exemplary embodiment of the roller bit 60 has a one-piece Stutzkorper 65 with a conically widening to the outer edge 64 cutting surface 62. Centrally on the underside of the Stutzkorpers 65 is in turn formed in a cylindrical neck portion 66, a shaft head receptacle 67 for the shaft end of a tool shaft. Deviating from the previous exemplary embodiment, however, the cutting surface 62 does not consist of an upper surface hardening or application layer, but the conically widening cutting surface 62 is formed by a plurality, here eg seventeen cutting segments, which are angeled on a conical outer peripheral wall of the supporting body 65 or fastened in some other way , Each cutting segment 90 according to the invention has a significantly higher hardness than the material of the Stutzkorpers 65 and the Stutzkorper 65th has radially behind a collar portion, on whose conically widening outer peripheral wall, the cutting segments 90 are supported, an annular ridge, which is provided with a recess as a free space to achieve even with a cutting surfaces formed by 90 cutting surfaces 62 an independent Nachschärfeffekt.
In Fig. 6 ist ein weiteres Ausführungsbeispiel für einen Rollenmeißel 110 mit einem massiven, einstückigen Stützkörper 115 gezeigt, der integral einen die Wellenkopfaufnähme 116 umfassenden Halsabschnitt und einen sich daran anschließenden und konisch erweiternden Kragenabschnitt 119 aufweist, der zentral mit einer Vertiefung 121 versehen ist, so dass am Rücken der Schneidfläche 112 ausschließlich ein Ringsteg mit konstanter Dicke als abstützender Teil des Stützkörper 115 ausgebildet ist. Wie beim Ausführungsbeispiel in Fig. 5 besteht die Schneidfläche 112 nicht aus einer umlaufenden Härtung sondern aus einzelnen Schneidsegmenten 140, die an der konisch sich nach außen erweiternden Außenumfangswand 120 des Ringstegs 122 angelötet sind. Abweichend vom vorherigen Ausführungsbeispiel sind sämtliche Schneidsegmente 140 umlaufend mit einer Decklage 145 über die gesamte Axiallänge der Schneidfläche 112 bedeckt. Im gezeigten Ausführungsbeispiel erstreckt sich die Decklage 145 annähernd von der Schneidkante 114 am Übergang der Schneidfläche 112 in die Stirnseite 111 bis zum zylindrischen Umfang des Halsabschnitts 118. Anstelle einer durchgehenden Deckschicht könnten auch ein oder mehrere Ringe um die einzelnen Segmente 140 umlaufen, um deren Verankerung am ringstegartigen Stützkörper im Bereich des Kragenabschnitts 119 zu unterstützen. Das Material der Decklage 145 oder der Ringe ist vorzugsweise sowohl erheblich weicher als das Material der Schneidsegmente 140 als auch weicher oder wenigstens ähnlich weich wie das Material des Stützkörpers 115. Die Decklage 145 kann beispielsweise aufgelötet sein.6, there is shown another embodiment of a roller bit 110 having a solid, one-piece support body 115 integrally having a neck portion including the shaft head receiving means 116 and an adjoining and flared collar portion 119 centrally provided with a recess 121. so that on the back of the cutting surface 112 exclusively a ring land of constant thickness is formed as a supporting part of the support body 115. As in the embodiment in FIG. 5, the cutting surface 112 does not consist of a peripheral hardening but of individual cutting segments 140, which are soldered to the conically outwardly widening outer peripheral wall 120 of the annular web 122. Notwithstanding the previous embodiment, all cutting segments 140 are circumferentially covered with a cover layer 145 over the entire axial length of the cutting surface 112. In the embodiment shown, the cover layer 145 extends approximately from the cutting edge 114 at the transition of the cutting surface 112 in the end face 111 to the cylindrical periphery of the neck portion 118. Instead of a continuous cover layer and one or more rings could rotate around the individual segments 140 to their anchoring to support the ring-web-like support body in the region of the collar portion 119. The material of the cover layer 145 or of the rings is preferably substantially softer than the material of the cutting segments 140 as well as softer or at least as soft as the material of the support body 115. The cover layer 145 may be soldered, for example.
In Fig. 7 ist ein Rollenmeißel 210 dargestellt, bei welchem ein Stützkörper 215 wiederum einen Halsabschnitt 218 und einen konisch sich erweiternden Kragenabschnitt 219 aufweist, der aufgrund einer Vertiefung 221 in der Stirnseite 211 radial hinter der Schneidfläche 212 zu einem Ringsteg 222 mit konisch verlaufender Außenumfangswand 220 sowie parallel hierzu verlaufender Innenumfangswand 224 verjüngt ist. Die Schneidfläche 212 besteht aus einer Oberflächenhärtung, einer aufgelöteten Schleißschicht oder aus aufgebrachten Schneidsegmenten und ist härter als das Material des Stützkörpers im Ringsteg 222. Die drehfeste Befestigung des Stützköpers 215 am Wellenende 207 einer Werkzeugwelle 206 erfolgt hier mittels einer separaten Klemmscheibe 235, die mittels einer Befestigungsschraube 209 gegen das Wellenende 207 verschraubt werden kann. Das Wellenende 207 ist mehrfach gestuft ausgeführt und weist zentral ein Sackloch 227 und außen eine Stufe 228 auf. An der äußeren Stufe 228 des Wellenendes 207 liegt der mit einer zylindrischen Mittelbohrung 225 versehene Halsabschnitt 218 des Stützkörpers 215 an. Der Stützkörper 215 kann mit seiner Mittelbohrung 225 auf die Stufe 228 am Wellenende 207 aufgeschoben werden. Am Übergang der Mittelbohrung 225 in den Grund 223 der Vertiefung 221 ist eine schräge Klemmfläche 226 ausgebildet, gegen welche der Klemmring 235 mit einer Gegenschräge 236 an seinem Umfang durch Anziehen der Schraube 209 anklemmbar ist. Das Zusammenspiel der beiden schrägen Klemmflächen 226, 236 klemmt den Stützring 215 gegen das Wellenende 207, so dass dieser drehfest und zugleich lösbar an der Werkzeugwelle 206 befestigt wird. Das Material des Stützkörpers 215 ist erheblich weicher als das Material der Schneidfläche 212, damit sich im Zusammenwirken mit der Vertiefung 221 der Nachschärfeffekt an der Schneidfläche 212 einstellt.In Fig. 7, a roller bit 210 is shown, in which a support body 215 again has a neck portion 218 and a conically widening collar portion 219, which due to a recess 221 in the end face 211 radially behind the cutting surface 212 is tapered to a ring land 222 with a conically extending outer circumferential wall 220 and parallel thereto extending inner peripheral wall 224. The cutting surface 212 consists of a surface hardening, a soldered wear layer or applied cutting segments and is harder than the material of the support body in the annular web 222. The rotationally fixed attachment of the Stützköpers 215 at the shaft end 207 of a tool shaft 206 is effected here by means of a separate clamping plate 235, which by means of a Fixing screw 209 can be screwed against the shaft end 207. The shaft end 207 is designed to be multi-stepped and has a blind hole 227 centrally and a step 228 on the outside. At the outer step 228 of the shaft end 207 is provided with a cylindrical central bore 225 neck portion 218 of the support body 215 at. The support body 215 can be pushed with its center bore 225 on the step 228 at the shaft end 207. At the transition of the central bore 225 in the base 223 of the recess 221 an inclined clamping surface 226 is formed, against which the clamping ring 235 is clamped with a counter-slope 236 at its periphery by tightening the screw 209. The interaction of the two inclined clamping surfaces 226, 236 clamps the support ring 215 against the shaft end 207, so that it is rotatably and at the same time releasably secured to the tool shaft 206. The material of the support body 215 is considerably softer than the material of the cutting surface 212, so that sets in conjunction with the recess 221 of the Nachschärfeffekt on the cutting surface 212.
Fig. 8 zeigt ein weiteres Ausführungsbeispiel eines erfindungsgemäßen Rollenmeißels 310, der an einem mehrfach gestuften Wellenende 307 einer Werkzeugwelle befestigbar ist. Der Rollenmeißel 310 weist einen Schneidring 346 auf, der einen zylindrischen Halsabschnitt 347 und einen konisch sich nach außen stegförmig erweiternden Kragenabschnitt 348 aufweist. Der Kragenabschnitt 348 bildet mit seiner äußeren Umfangsfläche die Schneidfläche 312 zum hinterschneidenden Abtragen von Gestein. Der gesamte Schneidring 346 besteht aus verschleißfesterem Material als ein Stützkörper 315, der beim Rollenmeißel 310 zugleich das Klemmstück zum Festklemmen des Schneidrings 346 am Wellenende 307 mittels der Befestigungsschraube 309 bildet. Um den Nachschärfeffekt zu erreichen, weist der zugleich das Klemm- element bildende Stützkörper 315 einen ringstegförmig sich nach außen erweiternden Kragenabschnitt 319 auf, der in einen Bodenabschnitt 375 übergeht, welcher den Freiraum 321 innerhalb der Innen- umfangswand 324 des Stützkörpers 315 begrenzt. Der Stützkörper 315 kann lose am Schneidring 346 anliegen oder mit diesem fest verbunden sein, wobei jedoch im Montagezustand der ringstegförmige Kragenabschnitt 319 mit seiner Außenumfangswand 320 gegen die Mantelinnenfläche 348' des Schneidrings 346 anliegt oder drückt. Die drehfeste Verankerung des Schneidrings 346 am Wellenende 307 wird über das Zusammenwirken einer Klemmschräge 326 am Wellenende 307 sowie einer Klemmschräge 336 am Übergang der Unterseite des Schneidrings 346 in eine zentrale Bohrung 325 des Schneidrings 346 erreicht. Auch beim Rollenmeißel 310 kann sich durch die erfindungsgemäß vorgesehene Kombination von Freiraum 321 und den unterschiedlichen Materialien des Schneidrings 346 einerseits und des zu einem in Radialrichtung hinter der Schneidfläche 312 verjüngten Ringstegs 322 des Stützkörpers 315 andererseits die jeweilige Schneidkante selbstständig nachschärfen.8 shows a further exemplary embodiment of a roller bit 310 according to the invention, which can be fastened to a multi-stepped shaft end 307 of a tool shaft. The roller bit 310 has a cutting ring 346, which has a cylindrical neck portion 347 and a conically outwardly web-shaped widening collar portion 348. The collar portion 348 forms with its outer peripheral surface the cutting surface 312 for the undercut removal of rock. The entire cutting ring 346 is made of a more wear-resistant material than a support body 315, which also forms the clamping piece for clamping the cutting ring 346 at the shaft end 307 by means of the fastening screw 309 at the roller bit 310. In order to achieve the re-sharpening effect, it also shows the clamping Element-forming support body 315 a ring web outwardly flared collar portion 319, which merges into a bottom portion 375, which bounds the free space 321 within the inner peripheral wall 324 of the support body 315. The support body 315 may be loose on the cutting ring 346 or be firmly connected thereto, but in the assembled state of the annular web collar portion 319 abuts with its outer peripheral wall 320 against the inner shell surface 348 'of the cutting ring 346 or pushes. The rotationally fixed anchoring of the cutting ring 346 at the shaft end 307 is achieved via the interaction of a clamping bevel 326 at the shaft end 307 and a clamping bevel 336 at the transition of the underside of the cutting ring 346 in a central bore 325 of the cutting ring 346. Even with the roller chisel 310, the combination of clearance 321 and the different materials of the cutting ring 346 on the one hand and the annular web 322 of the support body 315, which is tapered in the radial direction behind the cutting surface 312, can independently re-sharpen the respective cutting edge.
Fig. 9 zeigt ein sechstes Ausführungsbeispiel für eine Rollenmeißel 410, der wiederum auf einem gestuften Wellenende 407 mittels einer Befestigungsschraube 409 drehfest befestigt werden kann. Auch hier ist die Schneidfläche 412 an einem Schneidring 446 aus Hartmetall oder dgl . ausgebildet und wird am Schneidring 446 von der konisch sich erweiternden Umfangsflache gebildet. Die Arretierung des Schneidrings 446 am Wellenende 407 erfolgt mittels einer Klemmscheibe 435, die am Umfangsrand eine Klemmschräge 436 aufweist, die gegen eine weitere Klemmschräge 426 am Schneidring 446 drückt. Der Stützkörper 415 besteht beim Rollenmeißel 410 allerdings nur aus einem Ringkörper mit parallelogrammförmigen Querschnitt und zueinander paralleler Außenumfangswand 420 und Innenumfangswand 423. Der Stützring ist an der Innenumfangsfläche 428' des stegförmigen Kragenabschnitts 428 des Schneidrings 446 angelötet oder verankert. Der Stützring 415 ist so dünn wie möglich ausgeführt, um zu erreichen, dass die integral am Schneidring 446 ausgebildete Schneidfläche 412 für den Hinterschneidprozess stabil genug ausgeführt ist. Bei samtlichen Ausfuhrungsbeispielen sollte das Material der Schneidflache eine Festigkeit oder Harte aufweisen, die deutlich hoher ist als das Material des Stutzkorpers . Der unterschiedliche Härtegrad kann je nach Verwendungszweck variieren. Die Verwendung von Stahl für den Stutzkorper und durch Auftragsschweißen aufgebrachtes Hartmetall für die Schneidflache ist nur beispielhaft, ohne den Schutzbereich auf diese zu begrenzen. 9 shows a sixth exemplary embodiment of a roller bit 410, which in turn can be fastened in a rotationally fixed manner on a stepped shaft end 407 by means of a fastening screw 409. Again, the cutting surface 412 on a cutting ring 446 made of hard metal or the like. formed and is formed on the cutting ring 446 of the conically widening circumferential surface. The locking of the cutting ring 446 at the shaft end 407 by means of a clamping washer 435, which has a clamping bevel 436 at the peripheral edge, which presses against a further clamping bevel 426 on the cutting ring 446. However, in the case of the roller chisel 410, the support body 415 consists only of an annular body with a parallelogram-shaped cross-section and mutually parallel outer circumferential wall 420 and inner circumferential wall 423. The support ring is soldered or anchored to the inner peripheral surface 428 'of the web-shaped collar section 428 of the cutting ring 446. The support ring 415 is made as thin as possible so as to make the cutting surface 412 integrally formed on the cutting ring 446 sturdy enough for the undercut process. In samtliche exemplary embodiments, the material of the cutting surface should have a strength or hardness that is significantly higher than the material of the Stutzkorpers. The different degree of hardness can vary depending on the purpose. The use of steel for the Stutzkorper and by hardfacing applied hard metal for the cutting surface is only an example, without limiting the scope of protection on this.

Claims

Patentansprüche claims
1. Rollenbohrwerkzeug zum Abtragen von Material wie insbesondere Gestein, Mineralien oder dgl. nach dem Hinterschneidprinzip, mit einer konzentrisch um eine Mittelachse (M) herum ausgebildeten, sich konisch zur Stirnseite (11) des Rollenbohrwerkzeuges erweiternden Schneidfläche (12), und mit einem Stützkörper (15), der an der Innenseite der Schneidfläche (12) angeordnet ist und sich bis zur Stirnseite (11) des Werkzeuges erstreckt, dadurch gekennzeichnet, dass die Schneidfläche (12) aus härterem Material als der Stützkörper (15) besteht und dass der Stützkörper einen zumindest an einer Außenumfangswand (20) konischen Ringsteg (22) bildet, der mit seiner Innenumfangswand (23) einen Freiraum (21) an der Stirnseite (11) des Werkzeuges begrenzt.1. Roller drilling tool for removing material such as rocks, minerals or the like. According to the undercutting principle, with a concentric about a central axis (M) around, conically to the end face (11) of the roller drilling tool expanding cutting surface (12), and with a support body (15), which is arranged on the inside of the cutting surface (12) and extends to the end face (11) of the tool, characterized in that the cutting surface (12) of harder material than the support body (15) and that the support body forms an at least on an outer peripheral wall (20) conical annular web (22) which defines with its inner peripheral wall (23) has a free space (21) on the end face (11) of the tool.
2. Rollenbohrwerkzeug nach Anspruch 1, dadurch gekennzeichnet, dass der Freiraum (21) als Vertiefung ausgebildet ist.2. Roller drilling tool according to claim 1, characterized in that the free space (21) is formed as a recess.
3. Rollenbohrwerkzeug nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass sich der hohle Freiraum (21) von der Stirnseite (11) aus zumindest partiell über die Axialausdehnung der Schneidfläche (12) des Werkzeuges erstreckt.3. Roller drilling tool according to claim 1 or 2, characterized in that the hollow free space (21) from the end face (11) extends at least partially over the axial extent of the cutting surface (12) of the tool.
4. Rollenbohrwerkzeug nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass der Ringsteg (22) zwischen seiner Innenumfangswand (23) und seiner Außenumfangswand (20) eine konstante Dicke oder eine im Wesentlichen konstante Dicke aufweist.4. Roller drilling tool according to one of claims 1 to 3, characterized in that the annular web (22) between its inner peripheral wall (23) and its outer peripheral wall (20) has a constant thickness or a substantially constant thickness.
5. Rollenbohrwerkzeug nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Innenumfangswand (23) konisch verläuft.5. roller drilling tool according to one of claims 1 to 4, characterized in that the inner peripheral wall (23) is conical.
6. Rollenbohrwerkzeug nach Anspruch 5, dadurch gekennzeichnet, dass der Konuswinkel der Innenumfangswand (23) und der Konuswinkel der Schneidfläche (12) gleich sind oder um weniger als 8°, insbesondere weniger als 5°, vorzugsweise weniger als 2° voneinander abweichen. 6. Roller drilling tool according to claim 5, characterized in that the cone angle of the inner peripheral wall (23) and the cone angle of the cutting surface (12) are equal or differ by less than 8 °, in particular less than 5 °, preferably less than 2 °.
7. Rollenbohrwerkzeug nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass der Stützkörper (15; 115; 215) einen zylindrischen Halsabschnitt (18; 118; 218) und einen konischen, den Ringsteg (22; 122; 222) bildenden Kragenabschnitt (19; 119; 219) aufweist .A roller drilling tool according to any one of claims 1 to 6, characterized in that the support body (15; 115; 215) has a cylindrical neck portion (18; 118; 218) and a conical collar portion (22; 122; 222) forming the collar land (22; 19, 119, 219).
8. Rollenbohrwerkzeug nach Anspruch 7, dadurch gekennzeichnet, dass die Schneidfläche (12; 212) aus einer an der konisch verlaufenden Außenumfangswand (220) des Ringstegs (22; 222) aufgebrachten Oberflächenhärtung oder Hartschicht besteht.A roller drilling tool according to claim 7, characterized in that the cutting surface (12; 212) consists of a surface hardening or hard coating applied to the conically extending outer peripheral wall (220) of the annular web (22;
9. Rollenbohrwerkzeug nach Anspruch 7, dadurch gekennzeichnet, dass die Schneidfläche (62; 112) aus an der konisch verlaufenden Außenumfangswand (120) des Ringstegs (122) befestigten Schneidsegmenten (90; 140) oder Hartmetallsegmenten besteht.A roller drilling tool according to claim 7, characterized in that the cutting surface (62; 112) consists of cutting segments (90; 140) or cemented carbide segments secured to the conically extending outer peripheral wall (120) of the annular web (122).
10. Rollenbohrwerkzeug nach Anspruch 9, dadurch gekennzeichnet, dass die Schneidsegmente (140) mittels wenigstens eines Rings oder einer Decklage (145) bedeckt sind, die aus weicherem Material als die Schneidfläche (112) besteht.A roller drilling tool according to claim 9, characterized in that the cutting segments (140) are covered by at least one ring or cover layer (145) made of a softer material than the cutting surface (112).
11. Rollenbohrwerkzeug nach Anspruch 9, dadurch gekennzeichnet, dass das Material des Rings oder der Decklage (145J weicher ist als das Material des Ringstegs (122).11. A roller drilling tool according to claim 9, characterized in that the material of the ring or the cover layer (145J is softer than the material of the annular web (122).
12. Rollenbohrwerkzeug nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass die Schneidfläche (312; 412) Bestandteil eines Schneidrings (346; 446) aus Hartmetall od.dgl. ist, der einen zylindrischen Halsabschnitt (347; 447) und einen konischen Kragenabschnitt (348; 448) aufweist, an dessen Innenseite der Stützkörper (315; 415) anliegt oder ausgebildet ist.12. Roller drilling tool according to one of claims 1 to 6, characterized in that the cutting surface (312; 412) part of a cutting ring (346; 446) made of hard metal or the like. which has a cylindrical neck portion (347; 447) and a conical collar portion (348; 448) on the inside of which the support body (315; 415) abuts or is formed.
13. Rollenbohrwerkzeug nach einem der Ansprüche 7 bis 12, dadurch gekennzeichnet, dass der Schneidring (346) oder der Stützkörper (215; 415) an einer Innenbohrung (225; 325; 425) des Halsab¬ schnitts (218; 347; 447) eine Klemmschräge (226; 326; 426) für eine mit dieser zusammenwirkenden und mit einer Werkzeugwelle lösbar verbindbaren Klemmscheibe (235; 315; 435) aufweisen.13. Roller drilling tool according to one of claims 7 to 12, characterized in that the cutting ring (346) or the support body (215; 415) on an inner bore (225; 325; 425) of the Halsab ¬ section (218; 347; 447) a Clamping bevel (226; 326; 426) for a cooperating with this and releasably connectable with a tool shaft clamping disc (235, 315, 435).
14. Rollenbohrwerkzeug nach Anspruch 13, dadurch gekennzeichnet, dass die Klemmscheibe (235; 435) eine Klemmschräge (236; 436) mit Anschrägung aufweist und mittels einer Schraube mit einem Wellenende einer Werkzeugwelle verbindbar ist.14. Roller drilling tool according to claim 13, characterized in that the clamping disc (235; 435) has a clamping bevel (236; 436) with bevel and can be connected by means of a screw to a shaft end of a tool shaft.
15. Rollenbohrwerkzeug nach einem der Ansprüche 1 bis 14, dadurch gekennzeichnet, dass der Halsabschnitt (118) eine Wellenkopfauf- nahme (116) zur vorzugsweise drehfesten Aufnahme eines Wellenendes einer Werkzeugwelle aufweist.15. Roller drilling tool according to one of claims 1 to 14, characterized in that the neck portion (118) has a Wellenkopfauf- acceptance (116) for preferably rotationally fixed receiving a shaft end of a tool shaft.
16. Rollenbohrwerkzeug nach einem der Ansprüche 1 bis 15, dadurch gekennzeichnet, dass der Stützkörper (315) mit seinem Ringsteg16. Roller drilling tool according to one of claims 1 to 15, characterized in that the supporting body (315) with its annular web
(322) vorzugsweise lösbar an der Innenseite (348 ') des Schneidrings (346) anliegt und einen integral mit dem Ringsteg verbundenen Boden (375) aufweist, der axial gegen den Halsabschnitt(322) preferably removably abuts the inside (348 ') of the cutting ring (346) and has a bottom (375) integral with the ring land and axially against the neck portion
(347) des Schneidrings (346) mittels eines ins Wellenende einer(347) of the cutting ring (346) by means of a shaft end of a
Werkzeugwelle einschraubbaren Schraubmittels (309) anklemmbar ist.Tool shaft screwed screw (309) can be clamped.
17. Rollenbohrwerkzeug nach einem der Ansprüche 1 bis 16, dadurch gekennzeichnet, dass der Stützkörper oder der Schneidring mit dem Wellenende einer Werkzeugwelle verbunden ist, die mittels zweier am Umfang des Wellenschafts angeordneter Lager (30) sowie eines das andere Wellenende (71) axial abstützende Axiallagers (31) in einer Wellenaufnahme (5) eines Maschinenkopfes (2) abgestützt ist. 17. Roller drilling tool according to one of claims 1 to 16, characterized in that the supporting body or the cutting ring is connected to the shaft end of a tool shaft, by means of two arranged on the circumference of the shaft shaft bearing (30) and one of the other shaft end (7 1 ) axially supporting axial bearing (31) in a shaft receiving (5) of a machine head (2) is supported.
EP07818222A 2007-09-18 2007-09-18 Roller drill or roller bit Not-in-force EP2188493B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL07818222T PL2188493T3 (en) 2007-09-18 2007-09-18 Roller drill or roller bit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2007/008120 WO2009036781A1 (en) 2007-09-18 2007-09-18 Roller drill or roller bit

Publications (2)

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EP2188493A1 true EP2188493A1 (en) 2010-05-26
EP2188493B1 EP2188493B1 (en) 2011-02-02

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EP07818222A Not-in-force EP2188493B1 (en) 2007-09-18 2007-09-18 Roller drill or roller bit

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US (1) US8469458B2 (en)
EP (1) EP2188493B1 (en)
JP (1) JP5709519B2 (en)
CN (1) CN101796263B (en)
AT (1) ATE497571T1 (en)
AU (1) AU2007359121B2 (en)
CA (1) CA2699807C (en)
DE (1) DE502007006437D1 (en)
ES (1) ES2363116T3 (en)
PL (1) PL2188493T3 (en)
WO (1) WO2009036781A1 (en)
ZA (1) ZA201002632B (en)

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RU2673683C1 (en) * 2015-06-22 2018-11-29 Сандвик Интеллекчуал Проперти Аб Cutting unit with cutting device and method of assembly
CN109952413B (en) * 2016-11-10 2021-08-27 山特维克知识产权股份有限公司 Hob unit for underground excavation machine
PT3392455T (en) 2017-04-18 2023-10-17 Sandvik Intellectual Property Cutting apparatus
SE542339C2 (en) * 2017-04-24 2020-04-14 Sandvik Intellectual Property Cutter, cutting unit, cutting head & cutting apparatus for creating tunnels
CN107740697B (en) * 2017-08-22 2019-06-18 湖北鸣利来冶金机械股份有限公司 The push pipe detritus method that single round trip shallowly bores, more round trips combine, tunneling boring is broken
EP3656975B1 (en) * 2018-11-23 2023-04-26 Sandvik Mining and Construction Tools AB Disc cutter for tunnel boring machines and a method of manufacture thereof
EP3656974B1 (en) 2018-11-23 2023-07-12 Sandvik Mining and Construction Tools AB Disc cutter for undercutting apparatus and a method of manufacture thereof
CN110206541A (en) * 2019-06-28 2019-09-06 三一重型装备有限公司 Cutting mechanism and development machine

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Also Published As

Publication number Publication date
US20100219676A1 (en) 2010-09-02
US8469458B2 (en) 2013-06-25
CN101796263A (en) 2010-08-04
CA2699807C (en) 2012-11-20
CN101796263B (en) 2013-01-09
ES2363116T3 (en) 2011-07-20
AU2007359121B2 (en) 2015-05-07
CA2699807A1 (en) 2009-03-26
ZA201002632B (en) 2010-12-29
EP2188493B1 (en) 2011-02-02
JP2010539353A (en) 2010-12-16
JP5709519B2 (en) 2015-04-30
ATE497571T1 (en) 2011-02-15
AU2007359121A1 (en) 2009-03-26
DE502007006437D1 (en) 2011-03-17
PL2188493T3 (en) 2011-06-30
WO2009036781A1 (en) 2009-03-26

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