EP0201724A2 - Replaceable conveying spiral for a drill bit - Google Patents

Replaceable conveying spiral for a drill bit Download PDF

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Publication number
EP0201724A2
EP0201724A2 EP86104843A EP86104843A EP0201724A2 EP 0201724 A2 EP0201724 A2 EP 0201724A2 EP 86104843 A EP86104843 A EP 86104843A EP 86104843 A EP86104843 A EP 86104843A EP 0201724 A2 EP0201724 A2 EP 0201724A2
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EP
European Patent Office
Prior art keywords
profile
helix
din
exchange
drill bit
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
EP86104843A
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German (de)
French (fr)
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EP0201724A3 (en
EP0201724B1 (en
Inventor
Norbert Dipl.-Ing. Müller
Bernhard Moser
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.)
Hawera Probst Hartmetall Werk Zeugfabrik Ravensburgh KG
Robert Bosch Power Tools GmbH
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Hawera Probst Hartmetall Werk Zeugfabrik Ravensburgh KG
Hawera Probst GmbH
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Publication of EP0201724A3 publication Critical patent/EP0201724A3/en
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Publication of EP0201724B1 publication Critical patent/EP0201724B1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/15—Making tubes of special shape; Making tube fittings
    • B21C37/22—Making finned or ribbed tubes by fixing strip or like material to tubes
    • B21C37/26—Making finned or ribbed tubes by fixing strip or like material to tubes helically-ribbed tubes
    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
    • E21B17/22—Rods or pipes with helical structure

Definitions

  • the invention relates to an exchange conveyor helix for rock drills for conveying cuttings.
  • Rock drills of the generic type have long been known. In rock drills with a relatively large diameter, the helix that can be plugged onto the drill shank are designed as reusable parts that can be used when replacing a blunt drill head. Exchange coils of this type are known, for example, from US Pat. No. 3,372,763, DE-OS 30 44 775 or DE-OS 25 43 578.
  • a known exchange coil consists, for example, of a continuous support tube, on which the helical transport shoulder is applied by welding or soldering.
  • the exchange coil consisting of the casing tube and the transport shoulder can also be produced as a cast solid part with appropriate finishing.
  • the casing tube is dispensed with, so that only the transport shoulder helically surrounds the drill shank, with free spaces between the individual helical gears.
  • exchange helices have the disadvantage that they are complex to manufacture as a solid part with a casing tube and a transport shoulder and are therefore expensive. From Exchange helix without jacket tube can contract when there is increased resistance in the wall friction surface during the rotary movement.
  • the invention has for its object to provide a low-cost production helix for conveying cuttings as an exchange helix, which in particular also meets the requirements of a high load capacity in operation.
  • the exchange helix according to the invention has the advantage over the known solid helices that a very inexpensive endless production is possible without machining.
  • the stability of the helix is twisted by the z.
  • a conventional DIN profile with suitable toughness can be used as the profile starting material.
  • the winding process of such a profile results in a low-vibration spiral, due to the self-winding windings.
  • the transverse webs of the profiles are formed abutting in the individual turns, so that there is an almost closed jacket tube.
  • This design results in optimal support of the individual threads against each other.
  • commercially available DIN profiles according to DIN 59051 T-profile with sharp edges
  • DIN 1024 T-profile with edges
  • DIN 1028 L-profile
  • DIN 1027 Z-profile
  • Such shapes and corresponding steel selection are particularly suitable for the production of the windings of the replacement coil according to the invention without the steel tearing.
  • Fig. Lb the arrangement of the T-profile 11 is shown again in section.
  • Fig. Lb there are four threads arranged one above the other, which are made from a continuous T-profile 11 by helical winding.
  • the gap 16 between the individual threads is kept as small as possible in order to enable the individual threads to be supported against one another. As a result, the helix cannot contract during drilling due to the rotary movement or when increased resistance occurs in the wall friction surface.
  • the coil 10 shown in FIG. La has, for example, an outer diameter D ze 50 mm and a diameter of the casing tube d ⁇ 30 mm.
  • the wall thickness of the casing tube 13 is s ⁇ 3 mm.
  • the wall thickness of the transport shoulder 14, 15 is t ⁇ 2.5 mm.
  • a T-steel according to DIN 59051 or DIN 1024 is preferably selected as the material for the exchange helix.
  • FIGS. 3 and 4 each show a spiral cutout with an L-profile (FIG. 3) and a Z-profile (FIG. 4).
  • the jacket tube surface is formed by the leg 17 and the transport shoulder by the leg 18.
  • the helical design according to FIG. 4 with a Z-profile, with leg 19 as a tubular casing surface, intermediate web 20 as a transport shoulder and leg 21 for lateral, trough-shaped limitation of the transport surface.
  • the invention is not limited to the exemplary embodiment, but extends to all professional modifications and developments without their own inventive content.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Screw Conveyors (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

Es wird eine Austausch-Förderwendel vorgeschlagen, die für Gesteinsbohrer zur Förderung von Bohrklein dient. Zur Herstellung einer kostengünstigen Austauschwendel wird ein T-Profilstahl verwendet, dessen wendelförmig aufgewickelter Quersteg das Mantelrohr (13) und dessen senkrechter Steg die Transportschulter (15) bildet.

Figure imgaf001
An exchange helix is proposed, which is used for rock drills to convey cuttings. A T-section steel is used to produce an inexpensive replacement helix, the helically wound cross bar of which forms the casing tube (13) and the vertical bar of which forms the transport shoulder (15).
Figure imgaf001

Description

Die Erfindung betrifft eine Austausch-Förderwendel für Gesteinsbohrer zur Förderung von Bohrklein.The invention relates to an exchange conveyor helix for rock drills for conveying cuttings.

Gesteinsbohrer der gattungsgemäßen Art sind seit langem bekannt. Bei Gesteinsbohrern mit relativ großem Durchmesser werden die auf den Bohrerschaft aufsteckbaren Wendel als wiederverwertbare Teile ausgeführt, die beim Austausch eines stumpfes Bohrerkopfs weiter verwendet werden können. Austauschwendel dieser Art sind beispielsweise aus der US-PS 3 372 763, der DE-OS 30 44 775 oder der DE-OS 25 43 578 bekannt.Rock drills of the generic type have long been known. In rock drills with a relatively large diameter, the helix that can be plugged onto the drill shank are designed as reusable parts that can be used when replacing a blunt drill head. Exchange coils of this type are known, for example, from US Pat. No. 3,372,763, DE-OS 30 44 775 or DE-OS 25 43 578.

Eine bekannte Austauschwendel besteht beispielsweise aus einem durchgehenden Trägerrohr, auf welchem die wendelförmige Transportschulter durch Schweißen oder Löten aufgebracht ist. Die aus Mantelrohr und Transportschulter bestehende Austauschwendel kann auch als gegossenes massives Teil mit entsprechender Nachbearbeitung hergestellt sein. Bei einer anderen Form einer Austauschwendel wird auf das Mantelrohr verzichtet, so daß lediglich die Transportschulter den Bohrerschaft wendelförmig umgibt, bei freibleibenden Zwischenräumen zwischen den einzelnen Wendelgängen.A known exchange coil consists, for example, of a continuous support tube, on which the helical transport shoulder is applied by welding or soldering. The exchange coil consisting of the casing tube and the transport shoulder can also be produced as a cast solid part with appropriate finishing. In another form of an exchange helix, the casing tube is dispensed with, so that only the transport shoulder helically surrounds the drill shank, with free spaces between the individual helical gears.

Die bekannten Ausführungsformen von Austauschwendeln haben den Nachteil, daß sie als Massivteil mit Mantelrohr und Transportschulter aufwendig herstellbar und damit teuer sind. Die Austauschwendel ohne Mantelrohr kann sich beim Auftreten eines erhöhten Widerstandes in der Wandreibfläche bei der Drehbewegung zusammenziehen.The known embodiments of exchange helices have the disadvantage that they are complex to manufacture as a solid part with a casing tube and a transport shoulder and are therefore expensive. From Exchange helix without jacket tube can contract when there is increased resistance in the wall friction surface during the rotary movement.

Der Erfindung liegt die Aufgabe zugrunde, eine kostengünstig herzustellende Förderwendel zur Förderung von Bohrklein als Austauschwendel zu schaffen, die insbesondere auch den Anforderungen einer hohen Belastbarkeit im Betrieb genügt.The invention has for its object to provide a low-cost production helix for conveying cuttings as an exchange helix, which in particular also meets the requirements of a high load capacity in operation.

Diese Aufgabe wird erfindungsgemäß durch die kennzeichnenden Merkmale des Anspruchs 1 gelöst.This object is achieved by the characterizing features of claim 1.

Die erfindungsgemäße Austauschwendel hat gegenüber den bekannten Massiv-Wendeln den Vorteil, daß eine sehr kostengünstige Endlosherstellung ohne spanabhebende Bearbeitung möglich ist. Hierfür wird lediglich ein geeignetes Profil z. B. T-Profil, L-Profil, Z-Profil o. dgl. wendelförmig aufgewickelt, wobei der Quersteg z. B. beim T-Profil als Abstützung zwischen den einzelnen Gewindegängen dient. Dies hat den Vorteil, daß sich die Wendeln beim Bohren durch die Drehbewegung und beim Auftreten eines erhöhten Widerstandes in der Wandreibfläche nicht mehr zusammenziehen, da sich die Gewindegänge gegeneinander abstützen können.The exchange helix according to the invention has the advantage over the known solid helices that a very inexpensive endless production is possible without machining. For this purpose, only a suitable profile z. B. T-profile, L-profile, Z-profile or the like. Spirally wound, the crossbar z. B. in the T-profile serves as a support between the individual threads. This has the advantage that the helixes no longer contract when drilling due to the rotary movement and when there is increased resistance in the wall friction surface, since the threads can be supported against one another.

Die Stabilität der Wendel wird durch das Verdrehen des z. B. T-Profils bzw. durch den Wickelvorgang begünstigt. Als Profil-Ausgangsmaterial kann ein herkömmliches DIN-Profil mit geeigneter Zähigkeit verwendet werden. Durch den Aufwickelvorgang eines derartigen Profils ergibt sich eine schwingungsarme Wendel, durch die in sich federnde Windungen.The stability of the helix is twisted by the z. B. T-profile or favored by the winding process. A conventional DIN profile with suitable toughness can be used as the profile starting material. The winding process of such a profile results in a low-vibration spiral, due to the self-winding windings.

Durch die in Unteransprüchen aufgeführten Maßnahmen ist eine vorteilhafte und zweckmäßige Weiterbildung der erfindungsgemäßen Austauschwendel möglich.The measures listed in the subclaims enable an advantageous and expedient further development of the exchange coil according to the invention.

Gemäß der Ausbildung nach Unteranspruch 2 werden die Querstege der Profile in den einzelnen Windungen aneinanderstoßend ausgebildet, so daß sich ein nahezu geschlossenes Mantelrohr ergibt. Diese Ausführung ergibt eine optimale Abstützung der einzelnen Gewindegänge gegeneinander. In Ausbildung der Erfindung nach Unteranspruch 3 werden handelsübliche DIN-Profile gemäß DIN 59051 (T-Profil scharfkantig), DIN 1024 (T-Profil randkantig), DIN 1028 (L-Profil) und DIN 1027 (Z-Profil) verwendet. Derartige Formgebungen und entsprechende Stahlauswahl eignen sich besonders für die Herstellung der Wicklungen der erfindungsgemäßen Austauschwendel, ohne daß der Stahl reißt.According to the design according to subclaim 2, the transverse webs of the profiles are formed abutting in the individual turns, so that there is an almost closed jacket tube. This design results in optimal support of the individual threads against each other. In the development of the invention according to subclaim 3, commercially available DIN profiles according to DIN 59051 (T-profile with sharp edges), DIN 1024 (T-profile with edges), DIN 1028 (L-profile) and DIN 1027 (Z-profile) are used. Such shapes and corresponding steel selection are particularly suitable for the production of the windings of the replacement coil according to the invention without the steel tearing.

Weitere Merkmale und Vorteile der Erfindung sind in den nachfolgenden vorteilhaften und zweckmäßigen Ausführungsbeispielen in der Zeichnung dargestellt und in der nachfolgenden Beschreibung näher erläutert. Es zeigen

  • Fig. la eine perspektivische Ansicht der erfindungsgemäßen Austausch-Förderwendel,
  • Fig. lb eine schematische Darstellung eines Längsschnitts durch die Wendel und,
  • Fig. 2 ein Ausgangsprofil zur Herstellung der Wendel,
  • Fig. 3 einen Wendelausschnitt mit L-Profil und
  • Fig. 4 einen Wendelausschnitt mit Z-Profil.
Further features and advantages of the invention are shown in the following advantageous and expedient exemplary embodiments in the drawing and explained in more detail in the following description. Show it
  • La is a perspective view of the replacement conveyor spiral according to the invention,
  • Lb is a schematic representation of a longitudinal section through the helix and,
  • 2 shows an initial profile for producing the helix,
  • Fig. 3 shows a spiral section with L-profile and
  • Fig. 4 shows a spiral section with a Z-profile.

Die in der Fig. la perspektivisch dargestellte Austausch-Förderwendel 10 besteht aus einem T-Profil 11 wie in Fig. 2 dargestellt, dessen Quersteg 12 als Mantelrohr 13 und dessen senkrechter Steg 14 als Transportschulter 15 der Förderwendel 10 dient. In Fig. lb ist die Anordnung des T-Profils 11 nochmals im Schnitt dargestellt. In der Fig. lb sind vier Gewindegänge übereinander angeordnet, die aus einem durchgehenden T-Profil 11 durch wendelförmiges Aufwickeln gefertigt sind. Der Spalt 16 zwischen den einzelnen Gewindegängen wird möglichst klein gehalten, um die Abstützung der einzelnen Gewindegänge gegeneinander zu ermöglichen. Hierdurch können sich die Wendel beim Bohren durch die Drehbewegung bzw. beim Auftreten eines erhöhten Widerstandes in der Wandreibfläche nicht zusammenziehen.The exchange conveyor helix 10 shown in perspective in FIG. In Fig. Lb the arrangement of the T-profile 11 is shown again in section. In Fig. Lb there are four threads arranged one above the other, which are made from a continuous T-profile 11 by helical winding. The gap 16 between the individual threads is kept as small as possible in order to enable the individual threads to be supported against one another. As a result, the helix cannot contract during drilling due to the rotary movement or when increased resistance occurs in the wall friction surface.

Die in der Fig. la dargestellte Wendel 10 weist beispielsweise einen äußeren Durchmesser D ze 50 mm und einen Durchmesser des Mantelrohrs d ≈ 30 mm auf. Die Wandstärke des Mantelrohrs 13 beträgt s ≈ 3 mm. Die Wandstärke der Transportschulter 14, 15 beträgt t ≈ 2,5 mm.The coil 10 shown in FIG. La has, for example, an outer diameter D ze 50 mm and a diameter of the casing tube d ≈ 30 mm. The wall thickness of the casing tube 13 is s ≈ 3 mm. The wall thickness of the transport shoulder 14, 15 is t ≈ 2.5 mm.

Als Material für die Austauschwendel wird vorzugsweise ein T-Stahl nach DIN 59051 oder DIN 1024 gewählt.A T-steel according to DIN 59051 or DIN 1024 is preferably selected as the material for the exchange helix.

Selbstverständlich können vorstehende Werte durch andere Dimensionen und Maße ersetzt werden. Anstelle eines T-Profils kann ein geeignetes L-Profil nach DIN 1028 oder Z-Profil nach DIN 1027 verwendet werden. In den Figuren 3 und 4 sind jeweils ein Wendelausschnitt mit einem L-Profil (Fig. 3) und einem Z-Profil (Fig. 4) dargestellt. Beim L-Profil wird die Mantelrohrfläche durch den Schenkel 17, die Transportschulter durch den Schenkel 18 gebildet. Gleiches gilt für die Wendelausführung nach Fig. 4 mit Z-Profil, mit Schenkel 19 als Mantelrohrfläche, Zwischensteg 20 als Transportschulter und Schenkel 21 zur seitlichen, trogförmigen Begrenzung der Transportfläche.Of course, the above values can be replaced by other dimensions and dimensions. Instead of a T-profile, a suitable L-profile according to DIN 1028 or Z-profile according to DIN 1027 can be used. FIGS. 3 and 4 each show a spiral cutout with an L-profile (FIG. 3) and a Z-profile (FIG. 4). In the case of the L-profile, the jacket tube surface is formed by the leg 17 and the transport shoulder by the leg 18. The same applies to the helical design according to FIG. 4 with a Z-profile, with leg 19 as a tubular casing surface, intermediate web 20 as a transport shoulder and leg 21 for lateral, trough-shaped limitation of the transport surface.

Die Erfindung ist nicht auf das Ausführungsbeispiel beschränkt, sondern erstreckt sich auf alle fachmännischen Abwandlungen und Weiterbildungen ohne eigenen erfinderischen Gehalt.The invention is not limited to the exemplary embodiment, but extends to all professional modifications and developments without their own inventive content.

Claims (3)

1. Austausch-Förderwendel für Gesteinsbohrer zur Förderung von Bohrklein, dadurch gekennzeichnet, daß die Wendel (10) aus einem Profil (11) wie T-Profil, L-Profil, Z-Profil o. dgl. als Ausgangsmaterial besteht, welches wendelförmig aufgewickelt ist, wobei ein Quersteg (12, 17, 19) des Profils (11, 11', 11") zur Formung des Mantelrohres (13) und hierzu ein senkrechter Steg (14, 18, 20) des Profils (11, 11', 11") zur Formung der Transportschulter (15) dient.1. Exchange conveyor helix for rock drills for conveying cuttings, characterized in that the helix (10) consists of a profile (11) such as T-profile, L-profile, Z-profile or the like. As a starting material, which is wound helically a crossbar (12, 17, 19) of the profile (11, 11 ', 11 ") for forming the casing tube (13) and a vertical web (14, 18, 20) of the profile (11, 11', 11 ") is used to shape the transport shoulder (15). 2. Wendel nach Anspruch 1, dadurch gekennzeichnet, daß die wendelförmig aufgewickelten Querstege (12, 17, 19) des Profils (11, 11', 11") ein nahezu geschlossenes Mantelrohr (13) bilden.2. Helix according to claim 1, characterized in that the helically wound transverse webs (12, 17, 19) of the profile (11, 11 ', 11 ") form an almost closed jacket tube (13). 3. Wendel nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß als Profil (11) ein handelsübliches DIN-Profil nach DIN 1027, DIN 1028, DIN 59051 und DIN 1024 verwendbar ist.3. Helix according to claim 1 or 2, characterized in that a commercially available DIN profile according to DIN 1027, DIN 1028, DIN 59051 and DIN 1024 can be used as profile (11).
EP86104843A 1985-05-15 1986-04-09 Replaceable conveying spiral for a drill bit Expired - Lifetime EP0201724B1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19853517560 DE3517560A1 (en) 1985-05-15 1985-05-15 REPLACEMENT CONVEYOR FOR ROCK DRILLS
DE3517560 1985-05-15

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EP0201724A2 true EP0201724A2 (en) 1986-11-20
EP0201724A3 EP0201724A3 (en) 1987-09-30
EP0201724B1 EP0201724B1 (en) 1990-06-27

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DE (2) DE3517560A1 (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0322554A1 (en) * 1987-12-01 1989-07-05 Hawera Probst GmbH + Co. Rock drill bit
US4883135A (en) * 1987-09-18 1989-11-28 Hawera Probst Gmbh & Co. Apparatus for rock drill
EP2468427A3 (en) * 2010-12-22 2013-03-20 HILTI Aktiengesellschaft Tool and method for cleaning a borehole
JP2016204940A (en) * 2015-04-21 2016-12-08 三和機材株式会社 Excavator
EP3118180A1 (en) 2015-07-12 2017-01-18 G-tec Grimm technology GmbH Process for the preparation of a water-retaining fertiliser
EP3581756A1 (en) 2018-06-11 2019-12-18 HILTI Aktiengesellschaft Drilling device

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DE3635538A1 (en) * 1986-10-18 1988-04-28 Hawera Probst Kg Hartmetall DRILLING TOOL WITH INTERCHANGEABLE CONVEYOR
DK165307C (en) * 1987-06-04 1993-03-22 Kurt Ingvard Soerensen PROBLEM FOR MEASURING THE ELECTRICAL FORMATION RESISTANCE IN EARTH
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US7984773B2 (en) * 2008-05-13 2011-07-26 Longyear Tm, Inc. Sonic drill bit for core sampling
US7806204B2 (en) * 2008-10-29 2010-10-05 Longyear Tm, Inc. Sonic drill rod with external surface features
DE102012016101B3 (en) * 2012-08-15 2013-10-10 BOMA Maschinenbau GmbH Device for removing chips during machining production processes
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4883135A (en) * 1987-09-18 1989-11-28 Hawera Probst Gmbh & Co. Apparatus for rock drill
EP0322554A1 (en) * 1987-12-01 1989-07-05 Hawera Probst GmbH + Co. Rock drill bit
EP2468427A3 (en) * 2010-12-22 2013-03-20 HILTI Aktiengesellschaft Tool and method for cleaning a borehole
US9802226B2 (en) 2010-12-22 2017-10-31 Hilti Aktiengesellschaft Tool and method for cleaning a drilled hole
JP2016204940A (en) * 2015-04-21 2016-12-08 三和機材株式会社 Excavator
EP3118180A1 (en) 2015-07-12 2017-01-18 G-tec Grimm technology GmbH Process for the preparation of a water-retaining fertiliser
EP3581756A1 (en) 2018-06-11 2019-12-18 HILTI Aktiengesellschaft Drilling device
WO2019238411A1 (en) 2018-06-11 2019-12-19 Hilti Aktiengesellschaft Drilling device
US11525308B2 (en) 2018-06-11 2022-12-13 Hilti Aktiengesellschaft Drilling device

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Publication number Publication date
DE3517560A1 (en) 1986-11-20
EP0201724A3 (en) 1987-09-30
EP0201724B1 (en) 1990-06-27
US4699226A (en) 1987-10-13
DE3672294D1 (en) 1990-08-02

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