EP0363313B1 - Foret à couronne à pierre - Google Patents

Foret à couronne à pierre Download PDF

Info

Publication number
EP0363313B1
EP0363313B1 EP89810691A EP89810691A EP0363313B1 EP 0363313 B1 EP0363313 B1 EP 0363313B1 EP 89810691 A EP89810691 A EP 89810691A EP 89810691 A EP89810691 A EP 89810691A EP 0363313 B1 EP0363313 B1 EP 0363313B1
Authority
EP
European Patent Office
Prior art keywords
predetermined breaking
breaking points
slots
drilling tool
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.)
Expired - Lifetime
Application number
EP89810691A
Other languages
German (de)
English (en)
Other versions
EP0363313A2 (fr
EP0363313A3 (en
Inventor
Eugen Dr. Magyari
Gebhard Gantner
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.)
Hilti AG
Original Assignee
Hilti AG
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 Hilti AG filed Critical Hilti AG
Priority to AT89810691T priority Critical patent/ATE79071T1/de
Publication of EP0363313A2 publication Critical patent/EP0363313A2/fr
Publication of EP0363313A3 publication Critical patent/EP0363313A3/de
Application granted granted Critical
Publication of EP0363313B1 publication Critical patent/EP0363313B1/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
    • E21B10/00—Drill bits
    • E21B10/62—Drill bits characterised by parts, e.g. cutting elements, which are detachable or adjustable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28D—WORKING STONE OR STONE-LIKE MATERIALS
    • B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
    • B28D1/02—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing
    • B28D1/04—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing with circular or cylindrical saw-blades or saw-discs
    • B28D1/041—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing with circular or cylindrical saw-blades or saw-discs with cylinder saws, e.g. trepanning; saw cylinders, e.g. having their cutting rim equipped with abrasive particles
    • 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
    • E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
    • E21B10/48—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of core type
    • 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
    • E21B10/60—Drill bits characterised by conduits or nozzles for drilling fluids
    • E21B10/605—Drill bits characterised by conduits or nozzles for drilling fluids the bit being a core-bit

Definitions

  • the invention relates to a hollow drilling tool, in particular for rock such as concrete and the like, with a tubular support body which is provided at its front end in the feed direction with cutting segments containing hard materials and at least partially embedded in the support body.
  • Hollow drilling tools of the type mentioned are used, in particular, for creating openings of larger diameter in buildings and increasingly also for dowel holes in concrete having iron reinforcements.
  • the cutting segments usually contain synthetically produced diamonds as hard materials.
  • the carrier body has, between the cutting segments, axially and radially extending slots extending from the front end and serving for the passage of the cooling water supplied through the hollow drilling tool.
  • the cooling water is supplied under more or less high pressure, the slits being able to be smaller the higher the prevailing pressure.
  • the slots may be dispensed with entirely, since the cooling water on the face of the hollow drilling tool passes from the inside to the outside. Conversely, large cross sections of the slots are necessary when the cooling water pressure is low. If the cross section of the slots is large and the pressure of the cooling water is high, the cooling water only flows through the slots from the inside to the outside of the hollow drilling tool and the face of the hollow drilling tool which is subjected to the greatest stress is practically not cooled.
  • the invention has for its object to provide a hollow drilling tool that allows the user to easily make and adapt slots to the given conditions.
  • the carrier body has one or more predetermined breaking points, which are arranged between individual cutting segments and run essentially in a U-shape and are open towards the front end and are formed by cross-sectional weakenings.
  • the user is able to easily break out the slits along the predetermined breaking points if necessary.
  • This breaking out can be done, for example, using pliers.
  • the predetermined breaking points are expediently formed by recesses from one side.
  • the recesses are preferably made before the cutting segments are inserted.
  • the recesses can be formed over a large area in accordance with the desired cross section of the water slots or as notches surrounding the slots. In the former case a kind of floating skin is created, in the second case the material thickness of the support body remains the same in the area of the slot to be made as in the other areas of the support body.
  • the recesses are preferably made from the outside of the carrier body, since this is more accessible than the inside.
  • the recesses can be made by embossing or machining.
  • Another advantageous embodiment consists in forming the predetermined breaking points by means of two recesses arranged radially opposite one another.
  • the provision of recesses arranged opposite one another is particularly in the case of non-cutting production by embossing the recesses advantageous since the forces acting radially on the tubular support body cancel each other out and there is no deformation of the support body.
  • the recesses can be formed over a large area or as notches surrounding the slots.
  • Another expedient embodiment consists in forming the predetermined breaking points through perforations.
  • Such perforations can be made, for example, by drilling or punching small holes in the tubular support body. For certain applications, the sum of the cross-section of these holes can then suffice for the cooling water to pass through.
  • the web connecting the legs of the U-shaped predetermined breaking points is advantageously arranged at a different distance from the front end of the carrier body.
  • slots of different lengths and cross sections can be broken out. This enables the slots to be optimally adapted to the given pressure conditions of the cooling water.
  • the effective cross section of the slots can be kept approximately constant over the entire period of use of the hollow drilling tool by successively breaking out slots of different depths.
  • the cross section of the slots can also be changed by different widths, ie by the distance between the two webs.
  • the cross section of the slots In order to adapt the cross section of the slots, it is also expedient that several webs connecting the legs are provided. The entire depth of the slots is divided so that a gradual breaking out according to the desired cross section is made possible. In addition, by gradually breaking out individual parts, the cross-section can be kept approximately constant despite wear of the cutting segments.
  • the hollow drilling tool shown in FIGS. 1 and 2 essentially consists of a tubular carrier body 1 and at the front end of which cutting segments 2 are completely embedded in receptacles 1a Provide recesses 1c.
  • the recesses 1b and 1c are arranged radially opposite one another and have the shape of V-shaped notches.
  • the recesses 1b and 1c form predetermined breaking points which act as cross-sectional weakenings and which allow water slots 1d to be broken out.
  • the water slots 1d shown in FIG. 2 can be broken out in stages in accordance with the breaking off of a chocolate bar. This enables the cross section of the slots 1d to be adapted to the given conditions. With increasing wear of the cutting segments 2, further parts can also be broken out, so that the cross section of the slots 1d remains approximately the same during the entire period of use of the hollow drilling tool.
  • the hollow drilling tool shown in FIG. 3 consists of a tubular support body 11 and completely in receptacles 11a at the front end of the cutting body 12.
  • the recesses 11b create a type of webbed skin with a reduced wall thickness compared to the rest of the carrier body.
  • the recesses 11b also allow slots to be easily broken out, which can be done, for example, using pliers.
  • the hollow drilling tool shown in FIG. 4 consists of a tubular carrier body 21 and at the front end of which there are cutting segments 22 embedded in receptacles 21a.
  • the carrier body 21 is provided with continuous perforations 21b and 21c between the cutting segments. These perforations 21b and 21c enable water slots of different sizes to be broken out. The user can thus either break out only one of the two water slots or both water slots. Furthermore, it is possible to first break out the water slot 21d of less depth and, after the cutting segments 22 have worn out correspondingly, the part of the water slot 21e remaining in the carrier body.
  • the perforations 21b and 21c can be created by punching or drilling holes.

Landscapes

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

Claims (6)

1. Outil de percement, en particulier pour empierrement tels que béton et similaire, avec un élément porteur (1, 11, 21) qui est doté à son extrémité avant dans le sens de l'avancement de segments de lames (2, 12, 22) contenant un matériau dur et au moins partiellement inséré dans l'élément porteur (1, 11, 21) caractérisé en ce que l'élément porteur (1, 11, 21) présente un ou plusieurs emplacements de future découpe formés par des rétrécissements de sections entre des segments individuels de lames (2, 12, 22), s'étendant en substance en forme de U ouvert vers l'avant.
2. Outil de percement selon la revendication 1, caractérisé en ce que les emplacements de future découpe sont formés sur une face par des découpes (11b).
3. Outil de percement selon la revendication 1, caractérisé en ce que les emplacements de future découpe sont formés par deux découpes (1b, 1c) disposées l'une en face de l'autre dans la direction radiale.
4. Outil de percement selon la revendication 1, caractérisé en ce que les emplacements de future découpe sont formés par des perforations (21b, 21c).
5. Outil de percement selon l'une des revendications 1 à 4, caractérisé en ce que la traverse reliant les ailes de l'emplacement de future découpe s'étendant en forme de U est disposée à différentes distances de l'extrémité avant de l'élément porteur.
6. Outil de percement selon la revendication 5, caractérisé en ce que sont prévues plusieurs traverses reliant les ailes.
EP89810691A 1988-10-05 1989-09-14 Foret à couronne à pierre Expired - Lifetime EP0363313B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT89810691T ATE79071T1 (de) 1988-10-05 1989-09-14 Hohlbohrwerkzeug fuer gestein.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3833767 1988-10-05
DE3833767A DE3833767A1 (de) 1988-10-05 1988-10-05 Hohlbohrwerkzeug fuer gestein

Publications (3)

Publication Number Publication Date
EP0363313A2 EP0363313A2 (fr) 1990-04-11
EP0363313A3 EP0363313A3 (en) 1990-12-27
EP0363313B1 true EP0363313B1 (fr) 1992-08-05

Family

ID=6364376

Family Applications (1)

Application Number Title Priority Date Filing Date
EP89810691A Expired - Lifetime EP0363313B1 (fr) 1988-10-05 1989-09-14 Foret à couronne à pierre

Country Status (3)

Country Link
EP (1) EP0363313B1 (fr)
AT (1) ATE79071T1 (fr)
DE (2) DE3833767A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8485283B2 (en) 2007-09-05 2013-07-16 Groupe Fordia Inc. Drill bit
CN109930999A (zh) * 2019-04-01 2019-06-25 无锡锡钻地质装备有限公司 一种地质勘探钻头及其制造工艺

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2666843B1 (fr) * 1990-09-14 1992-12-24 Total Petroles Taillant d'outil de forage auto-affutable.
DE4301985C2 (de) * 1993-01-26 1997-06-05 Bilfinger Berger Bau Verfahren zum Herstellen eines Bohrlochs für die Injektion von mit Zement gebundenen Füllgütern in Rissen
BRPI0606205A2 (pt) 2005-01-18 2009-06-02 Groupe Fordia Inc broca para a perfuração de um furo
CN103774996A (zh) * 2014-01-26 2014-05-07 中国地质大学（武汉） 不产生空穴现象的金刚石钻头
RU2577351C1 (ru) * 2015-01-26 2016-03-20 Александр Александрович Третьяк Стабилизирующая кольцевая буровая коронка
RU2613712C1 (ru) * 2016-03-29 2017-03-21 Александр Александрович Третьяк Антивибрационная кольцевая буровая коронка
RU171734U1 (ru) * 2017-01-09 2017-06-13 Федеральное государственное автономное образовательное учреждение высшего образования "Сибирский федеральный университет" Алмазная коронка для бурения
RU202233U1 (ru) * 2020-02-28 2021-02-08 Федеральное государственное автономное образовательное учреждение высшего образования "Сибирский федеральный университет" Алмазная коронка для бурения
RU2745546C1 (ru) * 2020-10-12 2021-03-26 Федеральное государственное автономное образовательное учреждение высшего образования "Сибирский федеральный университет" Алмазная буровая коронка

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5382601A (en) * 1976-12-28 1978-07-21 Tokiwa Kogyo Kk Rotary grinding type excavation drill head
US4128136A (en) * 1977-12-09 1978-12-05 Lamage Limited Drill bit
DE3706641A1 (de) * 1987-03-02 1988-09-15 Hilti Ag Hohlbohrer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8485283B2 (en) 2007-09-05 2013-07-16 Groupe Fordia Inc. Drill bit
CN109930999A (zh) * 2019-04-01 2019-06-25 无锡锡钻地质装备有限公司 一种地质勘探钻头及其制造工艺

Also Published As

Publication number Publication date
DE58901984D1 (de) 1992-09-10
EP0363313A2 (fr) 1990-04-11
EP0363313A3 (en) 1990-12-27
DE3833767A1 (de) 1990-04-12
ATE79071T1 (de) 1992-08-15

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