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EP0771934B1 - Accouplement pour tiges de forage à percussion - Google Patents

Accouplement pour tiges de forage à percussion Download PDF

Info

Publication number
EP0771934B1
EP0771934B1 EP96116533A EP96116533A EP0771934B1 EP 0771934 B1 EP0771934 B1 EP 0771934B1 EP 96116533 A EP96116533 A EP 96116533A EP 96116533 A EP96116533 A EP 96116533A EP 0771934 B1 EP0771934 B1 EP 0771934B1
Authority
EP
European Patent Office
Prior art keywords
thread
threaded
drill
axially parallel
drilling tool
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP96116533A
Other languages
German (de)
English (en)
Other versions
EP0771934A2 (fr
EP0771934A3 (fr
Inventor
Hans-Peter Dr. Meyen
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.)
Robert Bosch Power Tools GmbH
Original Assignee
Hawera Probst 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 Hawera Probst GmbH filed Critical Hawera Probst GmbH
Publication of EP0771934A2 publication Critical patent/EP0771934A2/fr
Publication of EP0771934A3 publication Critical patent/EP0771934A3/fr
Application granted granted Critical
Publication of EP0771934B1 publication Critical patent/EP0771934B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • 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
    • E21B17/02—Couplings; joints
    • E21B17/04—Couplings; joints between rod or the like and bit or between rod and rod or the like
    • E21B17/042—Threaded
    • E21B17/0426—Threaded with a threaded cylindrical portion, e.g. for percussion rods

Definitions

  • the invention relates to a drilling tool, in particular for a rotational impact for processing rock or the like according to the preamble of claim 1.
  • connection thread must depend on the application be optimized. There are common ones for this Thread types, such as metric thread, trapezoidal thread, Saw thread or round thread. Any thread type has its specific properties and advantages. round thread are used especially where there is a high risk of Soiling and damage is present. This can in the rough everyday operation of such drilling tools may be the case. According to the figure 3 of the US Pat. No. 4,262,762 mentioned at the beginning is also used in a such a drilling tool used a conventional round thread. These generally have advantages with regard to one Insensitivity to dirt and corrosion. Despite these conditions, they must be easy to open and close be close.
  • US-A-2 052 011 is a drilling tool with the features of the preamble of claim 1 become known.
  • This drilling tool shows a boring bar with an attached Drill head connected to each other via a threaded connection are screwed, the threaded connection axially parallel Has sections.
  • the invention is based on the object Rock drilling tool for a particularly striking Propose stress, its threaded connection especially between the drill head and the drill shank the prior art has been optimized so that considerable Advantages are achieved.
  • the object of the invention is characterized by the features of Claim 1 solved.
  • the invention is based on the main idea that Use of a modified round thread and thus one Special thread is generally advantageous to the occurring Soiling, corrosion or the like to be able to handle.
  • a disadvantage of one species Round thread connections are, however, generally hereby associated transmission losses. These losses are all the more higher, the higher the impact energy to be transmitted Realizes frictional heat and sound energy. The frictional heat arises especially in those contact sections that have a steep slope angle. This means that a high efficiency of the transmission of the impact energy the smallest possible pitch angle, i.e. one is as flat as possible. Losses through occurring sound energy are caused by too much play and the associated impact of the parts on each other caused.
  • the invention provides that a modified round thread or a Special thread is used, in which in the area of Wave crests and / or the wave troughs of such a thread axially parallel threaded sections are provided through which a round thread in these sections straightened axially parallel becomes.
  • Axially parallel sections cannot namely axial Take up forces so that it is not in these thread areas to a deadlock and thus to an excessive Wear with appropriate heating of this Thread sections comes.
  • the coordinated Threaded sections of the external thread of the threaded pin and Internal threads of the threaded bore are designed such that they face each other on the side facing away from the direction of the force Thread groove over a high area similar to a trapezoidal thread and one form a continuous curve while the wave crests and troughs in particular for correct axial Leadership and not for axial power transmission due to their respective side flattening can be used.
  • the side of each thread groove facing the direction of force can rather a game between the respective Thread pairing may be provided. This results in an optimal one Relationship between power transmission and durability of the System.
  • Threaded connection in that in particular the Shaft antinode of the threaded pin an axially parallel Has threaded section, as well as the alternative or additional axially parallel section in the trough of the Threaded pin covers a length range that is about 1/5 to 1/4 of the pitch of the thread.
  • the associated Internal thread in the threaded hole is a mirror image formed, that is, the radially outer axially parallel section on the shaft crest of the threaded pin corresponds to an associated radially outer one axially parallel section in the trough of the internal thread.
  • connection between A corresponding drill head and drill shank modified round thread according to the invention additionally high level of power transmission of the striking energy receives an all-round waistband.
  • the between hole for that Internal thread and the outer diameter of the shaft part arranged circumferential collar with its circular surface supports large area on an opposite corresponding Collar on the drill head to the axial impact energy in the high Transfer dimensions from the drill shank to the drill head.
  • the modified round thread is from a Energy transfer relieves and also serves to a large extent for axial guidance between the drill shank and drill head.
  • Drill head 1 is a two-part drilling tool 1 shown, for example with a drill head 2 in Fig. 1b and for example a drill shaft 3 in Fig. 1a.
  • the Drill head 2 can be any other type of drill head include and in particular a drill head, as in all Prior art documents mentioned at the beginning is described.
  • 1b indicates, for example Use a drill bit as the drill head.
  • the drill shaft 3 can be any one Boring bar or the like with or without integrated Include conveyor helix, also a separate attachable Conveyor helix can be used with a cross boring head, for example would.
  • the drill head 2 a cup-shaped drill bit 4
  • the drill bit shaft 5 is designed as a threaded pin or threaded bolt 6.
  • the drill shaft 3 has a threaded nut 7 formed internal thread 7, which with the Threaded pin 6 cooperates.
  • Fig. 1a the borehole depth is L1 as well axial inlet section L2 shown.
  • Fig. 1b shows an entire pin length 11, a thread length 12 and a thread run-out length 13.
  • the collar 10 corresponding to the collar 9 of the drill head 2 the end face of the drill shaft 3 has corresponding Dimensions on.
  • the special feature of the modified round thread of the Threaded pin 6 and / or the threaded nut 7 now exists in that according to the representations in FIGS. 1 and 2 in the Wave crests and / or in the troughs of the round thread axially parallel sections are provided.
  • the threaded pin 6 on its round thread 8 each radially outer wave crests 11 and radially inner Wave valleys 12.
  • the internal thread 8 ' the threaded nut 7 radially inwardly projecting wave crests 11 ' as well as radially outward troughs 12 '.
  • Wave crests 11 axially parallel linear sections that That is, the radially outer area of the round thread 8 of the threaded pin 6 is flattened and parallel to Longitudinal axis of symmetry 13 arranged.
  • This axially parallel Section is in Fig. 1b, Fig. 2 with reference numeral 14 designated a width s1.
  • Fig. La shows the radial inside crest 11 'of the round thread 8' there also an axially parallel section 15 with the width s2 on.
  • the wave crest 11 of the round thread 8 of the threaded pin 6 therefore cooperates with its axially parallel section 14 a corresponding axially parallel section 15 'in Trough 12 'of the round thread 8' of the threaded nut 7 together, for example in the remaining area of the thread a continuous curve like one usual round thread may be present. Furthermore can however also an axially parallel section 15 of the radially downstream internal shaft crest 11 'of the threaded nut 7 interact with a corresponding axially parallel Section 14 'in the trough 12 of the threaded pin 6.
  • the one lying below the axially parallel section 14 Curve area 19 of the threaded pin 6 and the associated one Curve section 19 'of the threaded nut 7 can have a cavity Have 20 or gap 20, that is, in this area there is no power transmission. The same applies to the Curve area above the axially parallel section 15 of the Threaded nut 7.
  • the power transmission and in particular optimal guidance therefore happens between drill head 2 and drill shank 3 over the round thread 8, 8 'with axially parallel Surface sections 14, 14 ', 15, 15' on the respective Wave crests 11, 11 'or wave troughs 12, 12 ', or over the remaining curve shape 18, 18' and 19, 19 'of the modified round thread, which is constant or is continuously developed.
  • the length L1 has a dimension which corresponds approximately to 1 to 1.3 times the outer diameter d A of the drill bit 4.
  • the difference between the nominal diameter d N and the core diameter d K of the threaded pin 6 corresponds to approximately 10% of the core diameter.
  • the inlet zone or the inlet section 21 has a length L2 which corresponds to approximately 30% of the length L1. By this measure, the area in which the radius R2 lies at the transition from the threaded pin 6 to the drill bit 4, not unnecessarily tightened when joining the threads.
  • the two round threads 8, 8 ' are designed in accordance with conventional round threads, the flank radius R1, r1 in the respective thread being approximately 0.1 to 0.15 times the respective nominal diameter D N or d N corresponds.
  • the respective cylindrical section 14, 15 on the wave crests 11, 11 ' has an axial length s1, s2 which corresponds to 0.1 to 0.4 times the pitch h.
  • the axially parallel sections 14, 15 executed directly next to each other that is, the axially parallel section 14 on the crest 11 acts with a in Fig. La arranged in the trough 12 axially parallel Section 15 'together with approximately the same outer radius as this is indicated by dash-dotted lines in Fig. la. hereby is an optimal axially parallel guidance of the threaded parts achieved to each other.
  • such arrangements can only the wave crests 11 and / or only in the wave valleys 12 of the Threaded pin 6 may be arranged with associated sections in the threaded nut 7.

Landscapes

  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Geology (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Earth Drilling (AREA)

Claims (3)

  1. Outil de forage pour une sollicitation en percussion et rotation pour traiter de la roche ou analogue, une tête de forage (2) étant réalisée comme couronne de forage (4) équipée d'éléments de coupe, comme foret de perçage ayant une tête de forage croisée ou comme fleuret à rocher usuel, et l'outil étant réalisé en plusieurs pièces, et les pièces étant reliées ensemble par l'intermédiaire d'un filetage (8, 8'), des tronçons filetés parallèles à l'axe (14, 14' ; 15, 15') étant prévus, sur le filetage externe (8) d'un axe fileté (6) et/ou sur le filetage interne d'un écrou fileté (7), sur le sommet respectif (11, 11') ou dans le creux respectif (12, 12'), et la zone (18, 18') entre les tronçons filetés (14, 14' ; 15, 15') étant formée par un tracé de courbe continu,
    caractérisé en ce que la tige de foret (3) de l'outil de forage (1) présente un filetage interne (8') et une zone de section transversale périphérique (22) ayant un collet frontal (10), qui, pour la liaison filetée serrée (8, 8') pour le transfert des forces de percussion (P) sur un collet de butée périphérique (9), repose sur la tête de foret (2) avec la tige filetée (6) par coopération de formes et sous l'influence d'une force, et en ce que le tronçon parallèle à l'axe (14, 14') sur le filetage externe (8) de la tige filetée (6) et/ou le tronçon parallèle à l'axe (15, 15') sur le filetage interne (8') de l'écrou fileté (7) de la tige de foret (3) présentent une longueur axiale s1 ≈ s2 de 1/5 à 1/4 h, « h » étant le pas ou le pas hélicoïdal du filetage.
  2. Outil de forage selon la revendication 1,
    caractérisé en ce qu'au moins le sommet (11) de l'axe fileté (6) présente un tronçon fileté parallèle à l'axe (14) qui coopère avec un tronçon parallèle à l'axe correspondant (15') de l'écrou fileté (7) de la tige de l'outil de forage (3) pour un guidage axial.
  3. Outil de forage selon une des revendications précédentes,
    caractérisé en ce que la profondeur t1 ≈ t2 des filetages ronds (8, 8') vaut environ 1/6 à 1/7 du pas hélicoïdal h.
EP96116533A 1995-11-04 1996-10-16 Accouplement pour tiges de forage à percussion Expired - Lifetime EP0771934B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19541163 1995-11-04
DE19541163A DE19541163A1 (de) 1995-11-04 1995-11-04 Bohrwerkzeug, insbesondere zur Bearbeitung von Gestein

Publications (3)

Publication Number Publication Date
EP0771934A2 EP0771934A2 (fr) 1997-05-07
EP0771934A3 EP0771934A3 (fr) 1998-06-17
EP0771934B1 true EP0771934B1 (fr) 2003-04-23

Family

ID=7776639

Family Applications (1)

Application Number Title Priority Date Filing Date
EP96116533A Expired - Lifetime EP0771934B1 (fr) 1995-11-04 1996-10-16 Accouplement pour tiges de forage à percussion

Country Status (2)

Country Link
EP (1) EP0771934B1 (fr)
DE (2) DE19541163A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011123875A2 (fr) 2010-04-07 2011-10-13 Dywidag-Systems International Gmbh Outil de forage en deux parties pour le forage à percussion ou à roto-percussion de trous dans le sol ou dans la roche
US9643262B2 (en) 2013-07-25 2017-05-09 Kennametal Inc. Coupling mechanism for cutting tool
US9643264B2 (en) 2013-07-25 2017-05-09 Kennametal Inc. Coupling mechanism for cutting tool
US9889509B2 (en) 2014-05-05 2018-02-13 Kennametal Inc. Cutter heads with improved coupling

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE517151C2 (sv) * 2000-11-30 2002-04-23 Sandvik Ab Gängförband för slående borrning samt delar därtill
SE525431C2 (sv) * 2003-02-24 2005-02-22 Sandvik Ab Handel för slående borrning
SE528245C2 (sv) * 2004-09-23 2006-10-03 Seco Tools Ab Verktygshuvud med fattningsparti med axiella och radiella stoppytor
CN102493515B (zh) * 2011-12-15 2014-09-03 湖南科技大学 一种液压破碎锤钎杆结构及其合金钎头的镶嵌方法
AT13405U1 (de) * 2012-01-20 2013-12-15 Ceratizit Austria Gmbh Hartwerkstoff-gewindeverbindung
DE102012107546A1 (de) * 2012-08-17 2014-02-20 Franz Haimer Maschinenbau Kg Werkzeuganordnung

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US1876565A (en) * 1932-09-13 of canton
US1477855A (en) * 1922-04-18 1923-12-18 Fred W Thurston Drill
US1943879A (en) * 1930-04-08 1934-01-16 Detachable Bit Corp Of America Drill
US2052011A (en) * 1934-08-06 1936-08-25 Timken Roller Bearing Co Separable drill bit
US2772899A (en) * 1948-05-15 1956-12-04 Hughes Tool Co Threaded oil well drill stem connection with the threads having included crest angleof 90 degrees
US3492101A (en) * 1967-05-10 1970-01-27 Chromalloy American Corp Work-hardenable refractory carbide tool steels
NO134763C (fr) * 1971-01-07 1976-12-08 Sandvik Ab
US3876319A (en) * 1973-03-23 1975-04-08 Skil Corp Fastening means for two-piece core bit
US4040756A (en) * 1976-03-05 1977-08-09 Trw Canada Limited Drill rod thread form
US4332502A (en) * 1977-01-11 1982-06-01 Padley & Venables Limited Apparatus for use in drilling
DE3330025A1 (de) * 1982-08-30 1984-03-01 Ingersoll-Rand Co., 07675 Woodcliff Lake, N.J. Zweistueckiger bohrer
SE459681B (sv) * 1985-01-07 1989-07-24 Santrade Ltd Borrelement foer slagborrning
SE469602B (sv) * 1985-04-04 1993-08-02 Sandvik Ab Skarvgaenga foer slagborrning
DE3513347C1 (en) * 1985-04-13 1987-01-02 Karl Burgsmueller Conical, multi-start threaded connection for fastening parts of a deep-drilling tool
DE8521577U1 (de) * 1985-07-26 1986-04-17 Lindhorst, Jürgen, 2000 Hamburg Kronenbohrwerkzeug zum vorzugsweisen Bohren in Gestein, Mauerwerk od. dgl.
SE460301B (sv) * 1986-10-15 1989-09-25 Sandvik Ab Skarvstaang foer slaaende bergborrmaskin
US4799844A (en) * 1988-01-11 1989-01-24 Trw Inc Elliptical thread design
DE3910627A1 (de) * 1989-04-01 1990-10-04 Ischebeck Friedrich Gmbh Verbindungselement
DE4220636B4 (de) * 1992-06-24 2004-07-08 Friedr. Ischebeck Gmbh Verbindungselement, insbesondere Kupplungsmuffe, für eine Schraubverbindung von Injektionsankerstangen von Injektionsankern
DE4314868C2 (de) * 1993-05-05 2002-05-16 Hawera Probst Kg Hartmetall Bohrwerkzeug
SE505068C2 (sv) * 1995-03-27 1997-06-23 Sandvik Ab Förfarande för att överföra slagenergi från ett slagborrverktyg till ett borrhål, bergborrverktyg och borrkrona för slående borrning

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2011123875A2 (fr) 2010-04-07 2011-10-13 Dywidag-Systems International Gmbh Outil de forage en deux parties pour le forage à percussion ou à roto-percussion de trous dans le sol ou dans la roche
US9643262B2 (en) 2013-07-25 2017-05-09 Kennametal Inc. Coupling mechanism for cutting tool
US9643264B2 (en) 2013-07-25 2017-05-09 Kennametal Inc. Coupling mechanism for cutting tool
US9889509B2 (en) 2014-05-05 2018-02-13 Kennametal Inc. Cutter heads with improved coupling

Also Published As

Publication number Publication date
DE19541163A1 (de) 1997-05-07
DE59610370D1 (de) 2003-05-28
EP0771934A2 (fr) 1997-05-07
EP0771934A3 (fr) 1998-06-17

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