EP0985081B1 - Verfahren zur herstellung eines gesteinbohrers - Google Patents

Verfahren zur herstellung eines gesteinbohrers Download PDF

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Publication number
EP0985081B1
EP0985081B1 EP98934749A EP98934749A EP0985081B1 EP 0985081 B1 EP0985081 B1 EP 0985081B1 EP 98934749 A EP98934749 A EP 98934749A EP 98934749 A EP98934749 A EP 98934749A EP 0985081 B1 EP0985081 B1 EP 0985081B1
Authority
EP
European Patent Office
Prior art keywords
drilling
spiral
rock drill
drill
conveyor
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
EP98934749A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0985081A1 (de
Inventor
Wolfgang Peetz
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 EP0985081A1 publication Critical patent/EP0985081A1/de
Application granted granted Critical
Publication of EP0985081B1 publication Critical patent/EP0985081B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • E—FIXED CONSTRUCTIONS
    • E21—EARTH OR ROCK DRILLING; MINING
    • E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
    • E21B10/00—Drill bits
    • E21B10/44—Bits with helical conveying portion, e.g. screw type bits; Augers with leading portion or with detachable parts
    • E21B10/445—Bits with helical conveying portion, e.g. screw type bits; Augers with leading portion or with detachable parts percussion type, e.g. for masonry

Definitions

  • the invention relates to a method for producing a Rock drill according to the preamble of claim 1.
  • Known drilling tools exist for processing rock from a drill head with inserted carbide insert, an attached spiral shaft with spiral conveyor and a clamping shaft for inserting the drilling tool into a drive machine, such as Impact drill or the like.
  • the spiral conveyor spiral of rock drills will be machined or non-cutting to the flutes into the generally cylindrical starting material.
  • the spiral conveyor has the Main task that solved by the carbide cutting edge Material, i.e. the drilling dust or cuttings from the borehole nowzu specialn.
  • Conveyor groove cross section chosen such that a Diameter ratio of the core diameter to Delivery spiral diameter of approx. 0.5 results. Too big Conveying groove cross section has the disadvantage that the Core diameter of the conveyor spiral is greatly weakened, what can lead to breaks. Apart from that elaborate production of the conveyor grooves must also be very high quality alloy tool steels are used to to meet the requirements.
  • Drilling tool also for use as a rock drill with a Fitting a hard metal cutting edge has become known, which consists of a rolled basic profile with two longitudinal ribs and its spiral by twisting or twisting the Basic profile is produced.
  • Drilling tool is the ratio of helix diameter to Core diameter> 0.5, as is usual with rock drill bits.
  • the conveyor helix formed by the twisted longitudinal ribs is comparatively expensive due to its shape.
  • the invention is based, an extreme task to create inexpensive to manufacture drilling tool at what is the lowest cost for the raw material and yet a full-fledged drilling tool is available stands.
  • This task is based on a process for Production of a rock drill according to the generic term of Claim 1 according to the invention by the characterizing Features of claim 1 solved.
  • the invention is based on the finding that the Drilling performance of drilling tools also significantly through the achievable delivery volume of drilling dust in the drilling dust grooves is determined.
  • This is what conventional drills in generally one or two, exceptionally three Funding spiral grooves are available that have a corresponding Groove cross-section must have to the removal of the To allow drilling dust.
  • the required groove cross section however, basically weakens the core cross section of the Drilling tool in the helical area, which is particularly the case with Drilling tools with small diameters of e.g. 2 mm to 6 mm can lead to strength problems in the spiral shaft.
  • the present invention can solve the problem of Weakening of the core cross-section as a result of introduced According to the invention, solve feed spiral grooves by instead of usually two conveyor spiral grooves six such grooves can be used by twisting a Hexagonal steel. This will make the work performance the drilling dust production of usually one or two Grooves distributed over six spiral feed grooves, which the Groove depth can be kept much lower and therefore a particularly high spiral shaft stiffness is achieved.
  • the rock drill 1 shown in FIGS. 1 to 3 has a drill head 2, a helical shaft 3 and a Clamping shank 4.
  • the drill head 2 has a commercially available roof-shaped hard metal cutting plate 5, with their Outside diameter D forms the nominal drill diameter.
  • a commercially available hexagonal steel is used as the starting material for producing the rock drill, as is available in a wide variety of dimensions, for example in DIN 176, DIN 1015 or DIN 59110 (hexagonal wire rod).
  • the key width s is used to determine the respective dimensions.
  • the diagonal 8 placed through the respective points 7 of the hexagonal profile 6 has a length of d 1 . If such a hexagonal profile is twisted as shown in FIGS. 1 to 3, the longitudinal edges 7 'lie on the circumference 10 of the conveyor helix thus formed. In the illustration in FIG.
  • the hexagonal profile 6 of the clamping shank 4 is held over a length l 1 and the remaining part of the hexagonal profile is twisted through a length l 2 by, for example, 360 °.
  • the key surface 11 shown in FIG. 3 is accordingly rotated once through 360 °, for example.
  • the ratio of the diameter D of the hard metal cutting plate 5 to the diameter d 1 of the conveying helix 3 and thus the protrusion of the hard metal cutting plate is selected in conventional dimensions by conventional drilling tools.
  • Drilling tests have shown that with such a tool with hexagon profile in standard impact drills good drilling results can be achieved. It is from great advantage that the manufacturing cost of such Drilling tool reduced enormously against usual manufacturing costs can be, since no machining for Production of the spiral conveyor is more required.
  • a particular advantage of using such hexagonal profile bars also lies in the shape of the Clamping shank, the key surfaces 11 due to their Arrangement automatically clamping surfaces in a conventional Three-jaw chuck of an impact drill or the like form.
  • the drilling tool can be firm and form-fitting be clamped into the processing machine without it to the otherwise very frequent spinning of the drilling tool in the processing machine comes.
  • the jaws of the three-jaw chuck are closed frequently used drilling machines do not have enough grip for offer a conventional circular cylindrical clamping shank.
  • the positive clamping by means of a hexagonal clamping shaft therefore also offers considerable Benefits.

Landscapes

  • Engineering & Computer Science (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • Physics & Mathematics (AREA)
  • Environmental & Geological Engineering (AREA)
  • Fluid Mechanics (AREA)
  • Mechanical Engineering (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Drilling Tools (AREA)
  • Earth Drilling (AREA)
EP98934749A 1997-05-30 1998-05-15 Verfahren zur herstellung eines gesteinbohrers Expired - Lifetime EP0985081B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE19722517A DE19722517A1 (de) 1997-05-30 1997-05-30 Bohrwerkzeug
DE19722517 1997-05-30
PCT/DE1998/001377 WO1998054436A1 (de) 1997-05-30 1998-05-15 Bohrwerkzeug

Publications (2)

Publication Number Publication Date
EP0985081A1 EP0985081A1 (de) 2000-03-15
EP0985081B1 true EP0985081B1 (de) 2002-11-13

Family

ID=7830839

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98934749A Expired - Lifetime EP0985081B1 (de) 1997-05-30 1998-05-15 Verfahren zur herstellung eines gesteinbohrers

Country Status (5)

Country Link
EP (1) EP0985081B1 (da)
CN (1) CN1259189A (da)
DE (2) DE19722517A1 (da)
DK (1) DK0985081T3 (da)
WO (1) WO1998054436A1 (da)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR200400081Y1 (ko) * 2005-08-23 2005-11-01 차인철 육각기둥 드릴
CN103939012A (zh) * 2014-04-28 2014-07-23 中国矿业大学(北京) 高应力松软突出厚煤层大直径钻孔装置
EP3106253A1 (de) * 2015-06-17 2016-12-21 HILTI Aktiengesellschaft Bohrer und herstellungsverfahren

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR628665A (fr) * 1926-05-17 1927-10-27 Hand Tools Ltd Perfectionnements aux fraises rotatives ou à percussion destinées à perforer la pierre et les matières analogues
DE2045896A1 (de) * 1970-01-30 1972-03-23 Fischer Artur Schlagbohrdubeleinheit zum Bohren von Lochern und zum dann Setzen von Be festigungselementen
DE6933778U (de) 1969-08-27 1971-10-14 Aackersberg Mortensen Spiralbohrer.
SE459680B (sv) * 1984-10-01 1989-07-24 Santrade Ltd Borrstaal
CS272904B1 (en) 1988-09-12 1991-02-12 Vladislav Ing Stary Drilling tool
AU8908291A (en) * 1990-11-26 1992-06-25 Stanley D. Robinson Twisted percussion drill rod and manufacturing method

Also Published As

Publication number Publication date
WO1998054436A1 (de) 1998-12-03
DK0985081T3 (da) 2003-02-17
EP0985081A1 (de) 2000-03-15
DE59806280D1 (de) 2002-12-19
CN1259189A (zh) 2000-07-05
DE19722517A1 (de) 1998-12-03

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