EP1415065A1 - Bohrkrone - Google Patents
BohrkroneInfo
- Publication number
- EP1415065A1 EP1415065A1 EP02759861A EP02759861A EP1415065A1 EP 1415065 A1 EP1415065 A1 EP 1415065A1 EP 02759861 A EP02759861 A EP 02759861A EP 02759861 A EP02759861 A EP 02759861A EP 1415065 A1 EP1415065 A1 EP 1415065A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- hard material
- hard
- drill head
- hard metal
- drill
- 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
Links
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
- E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
- E21B10/56—Button-type inserts
Definitions
- the present invention relates to a drill bit for drilling, in particular rotary impact drilling, a hole, in particular a tap hole of a blast furnace, the drill bit consisting of a drill head with a plurality of hard material or hard metal inserts and a base body for connection to a drive element etc. for driving or loading of the drill bit, the hard material or hard metal inserts being received in bores or openings in the drill head.
- Known hard material or hard metal inserts in connection with the production of a drill bit usually have a plane on the cutting part protruding from the drill head which is essentially normal to the longitudinal axis of the insert and which, if possible, transmits power on a correspondingly flat surface of the
- Base material rests, while in DE-A 34 08 225 a recess is provided below the end of the inserts, so that no direct contact between the insert and the bore is provided.
- a recess is provided below the end of the inserts, so that no direct contact between the insert and the bore is provided.
- the present invention now aims to ensure, when providing or arranging hard material or hard metal inserts on a drill head of a drill bit, that even with uneven stress or wear of such hard material or hard metal inserts, a correspondingly large area or a large and im an essentially constant surface area is provided for the transmission of the impact energy in order to achieve a correspondingly rapid drilling progress.
- the drill bit according to the invention starting from a drill bit of the type mentioned at the outset, is essentially characterized in that at least one hard material or hard metal insert is at least partially formed at the end accommodated in the drill head with a curved or curved surface contour which has a complementary, curved or curved surface of the drill head and / or the base body together - menwirkt.
- at least one hard material or hard metal insert at the end received in the drill head is at least partially formed with a curved or curved surface contour, which interacts with a complementary, curved or curved surface of the drill head and / or the base body that even with uneven loading or wear of such a hard material or.
- Hard metal insert and any resulting loosening of the same in the receiving opening in the drill head can nevertheless reliably introduce or transfer the complete release energy or in particular impact energy from the base body of the drill bit via the respective hard material insert or all hard material inserts into the material to be treated.
- the curved surface contour of the end of the hard material or hard metal insert is formed by a spherical surface or a spherical layer, with such a spherical surface or spherical layer resulting in cost-effective and simple production with the greatest possible adaptation of the Positioning of a possibly loosened hard material insert in the drill head or the corresponding receiving opening can be achieved.
- the end of the hard material or hard metal insert formed with the curved or curved surface contour has a protruding end of the hard material protruding from the drill head. or carbide insert has enlarged outer dimensions. By means of such enlarged external dimensions, the hard material insert can be safely stored in a corresponding receiving opening in the drill bit and a correspondingly large surface area can also be made available for a reliable transmission of the impact energy.
- the clear width of a bore or opening for receiving the hard material or hard metal insert the outer dimensions of the end of the hard material or hard metal insert to be accommodated in the drill head at least slightly exceeds and that the hard material or hard metal insert is surrounded in the sub-area received in the bore by a sleeve, the outer dimensions of which are adapted to the inside diameter of the bore of the drill head, wherein, as stated in the introduction, the use of appropriate sleeves for fixing of hard material or hard metal inserts is known per se.
- the sleeve surrounding the hard material or hard metal insert can be welded to the material of the drill head. While in known embodiments, hard material or hard metal inserts were usually soldered directly to the material of the drill head or the base body, the use of a sleeve allows welding between the sleeve material and the material of the base body or the drill head, while usually welding of the materials used for the hard material or hard metal inserts is not possible.
- Providing a weld to fix a hard material or hard metal insert on the drill head or the base body further ensures that when using a drill bit according to the invention at elevated temperatures, for example for producing a tap hole of a blast furnace, the welded connection despite the possibly prevailing high temperatures to fix the hard material or hard metal insert on the drill bit is not loosened or loosened.
- the hard material or hard metal inserts from the side of the drill head facing the base body of the drill bit can be fitted into the bores or through-openings and that the drill head can be connected, in particular welded, to the base body after the hard material or hard metal inserts have been received.
- the hard material inserts for example are secured against falling out by providing correspondingly larger external dimensions, the drill head can subsequently be connected directly to the base body of the drill bit, in particular welded, so that again a reliable fixing of the hard material or hard metal inserts can be achieved.
- the drill head in particular at positions or lines for receiving a plurality of hard materials - or hard metal inserts is divided and that the sub-areas of the drill head after receiving the hard material or hard metal inserts in the bores or openings can be connected to one another and / or to the base body, in particular welded.
- Such partial areas or partial sections of the drill head can also be produced in a correspondingly simple and precisely coordinated manner, whereupon the individual elements of the drill head are also connected, in particular welded, to the base body after the hard material or hard metal inserts have been received.
- the bores or perforations of the drill head have a cross-section tapering towards the outer surface of the drill head and / or in that of the Outer surface of the drilling head end region facing away or are formed with an enlarged cross section.
- Such tapering receiving openings can be produced in a correspondingly simple manner, and correspondingly offset areas, which can be matched, for example, to increasing external dimensions of the hard material or hard metal inserts, are also easy to produce.
- FIG. 1 shows a section through a first embodiment of a drill bit according to the invention
- FIG. 2 shows a top view of the drill bit shown in FIG. 1 according to arrow II, FIG. 1 showing a section along the line I-I of FIG. 2;
- FIG. 3 shows, in a representation similar to FIG. 1, a section through a modified embodiment of a drill bit according to the invention
- 4 shows a plan view of the drill bit shown in FIG. 3 according to arrow IV, FIG. 3 showing a section along the line III-III of FIG. 4;
- FIG. 5 in turn, in a representation similar to FIG. 1, a section through a further modified embodiment of a drill bit according to the invention.
- Fig. 6 is a plan view of the drill bit shown in Fig. 5 according to arrow VI, wherein Fig. 5 shows a section along the line V-V of Fig. 6.
- a drill bit is generally designated by 1, with a base body 2, to which a drill pipe (not shown in more detail) adjoins, for example via a schematically indicated screw connection 3, in one piece is formed with a drill head 4.
- the drill head 4 has a plurality of receiving openings 5, in each of which hard material or hard metal inserts 6 are arranged.
- flushing bores 7 for introducing a flushing fluid open into the area of the excavation or drilling surface such flushing fluid also being introduced via the drill pipe (not shown in more detail).
- the hard material or hard metal inserts 6 are fixed using sleeves 8 which surround the hard material or hard metal inserts 6 over a partial region of their longitudinal extent, the sleeves 8 with the material of the drill head 4 are welded via schematically indicated welds or welds 9.
- Each hard material or hard metal insert 6 has at the end facing away from the end projecting from the drill head and received in the drill head 4 an area 10 which has a surface 11, for example, spherically shaped.
- the receiving opening 5 is also formed with a correspondingly curved or curved, complementary surface.
- Tungsten carbide insert 6 as well as the receiving opening 5 can ensure that the hard material or hard metal or sets 6, which can lead to a loosening in the individual receiving openings 5, for example, even with a slight inclination in the respective receiving opening 5, a corresponding power transmission from the base body 2 or drill head 4 to the hard material or hard metal inserts 6 can take place.
- the hard material or hard metal inserts 6 have a stepped region 13 in the end region 10, the end region 10 having enlarged outer dimensions compared to the end of the hard material or hard metal insert 6 protruding from the drill head 4, so that everyone can use the sleeve 8 Hard material or hard metal insert is held securely in the drill head 4. Since the sleeve 8 is usually made of a compared to the hard material. If the hard metal insert 6 has softer or less solid material, loosening of the hard material or hard metal inserts 6 can be expected if the hard material or hard metal inserts 6 are in particular eccentric, although the stripped area or shoulder 13 causes the
- Hard material insert 6 can be avoided from the receiving opening 5.
- the base body again designated with 2 is formed separately from the drill head 4 and the drill head 4 is further divided into two halves, which in particular in FIG. 4 with 4 'and 4 " are designated.
- the hard material inserts 6 are inserted into the receiving openings 5 before the drill head 4 is fixed to the base body 2 by being pushed in from the back or side of the drill head 4 facing the base body 2 the respective receiving openings 5 are introduced, whereupon the partial regions 4 ′ and 4 ′′ of the drilling head are welded to the base body 2, corresponding welding points being indicated by 14 and 15 in FIG. 3.
- both the hard material or hard metal inserts 6 and the receiving openings 5 each have complementary, curved or curved surfaces 11. Furthermore, a stepped area or shoulder 13 is again provided at the end of each hard material or hard metal insert 6 received in the drilling head 4 as a safeguard against falling out of the respective receiving opening 5 of the drilling head 4.
- FIGS. 5 and 6 also use a drill head 4 which is separate from the base body 2 of the drill bit 1, in which hard material inserts 6 are in turn received in corresponding receiving openings 5 before the base body 2 is connected to the drill head 4.
- the drill head 4 is formed in one piece and there is a connection to the base body 2 by a weld, again indicated by 14.
- both the end of the hard material or hard metal insert 6 received in the drill head 4 and the receiving area in the base body 2 are curved and curved in this embodiment Surface formed.
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)
- Percussive Tools And Related Accessories (AREA)
Abstract
Description
Claims
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT12012001 | 2001-08-01 | ||
| AT12012001 | 2001-08-01 | ||
| PCT/AT2002/000227 WO2003012244A1 (de) | 2001-08-01 | 2002-07-31 | Bohrkrone |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1415065A1 true EP1415065A1 (de) | 2004-05-06 |
| EP1415065B1 EP1415065B1 (de) | 2005-01-12 |
Family
ID=3687057
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP02759861A Expired - Lifetime EP1415065B1 (de) | 2001-08-01 | 2002-07-31 | Bohrkrone |
Country Status (9)
| Country | Link |
|---|---|
| US (1) | US6926104B2 (de) |
| EP (1) | EP1415065B1 (de) |
| AR (1) | AR035264A1 (de) |
| AT (1) | ATE287024T1 (de) |
| DE (1) | DE50202009D1 (de) |
| ES (1) | ES2236562T3 (de) |
| TW (1) | TWI225431B (de) |
| WO (1) | WO2003012244A1 (de) |
| ZA (1) | ZA200401101B (de) |
Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20060135966A1 (en) * | 2004-11-15 | 2006-06-22 | Laurent Schaller | Catheter-based tissue remodeling devices and methods |
| WO2009003088A2 (en) * | 2007-06-26 | 2008-12-31 | Baker Hughes Incorporated | Rounded cutter pocket having reduced stressed concentration |
| US20100025114A1 (en) * | 2008-01-22 | 2010-02-04 | Brady William J | PCD Percussion Drill Bit |
| CA126499S (en) * | 2008-02-26 | 2009-03-20 | Sandvik Intellectual Property | Drill bit |
| CA126500S (en) * | 2008-02-26 | 2009-03-20 | Sandvik Intellectual Property | Rock drill bit |
| US20100108398A1 (en) * | 2008-11-06 | 2010-05-06 | Dongmin Niu | Percussion Rock Drilling Bit with More Efficient Flushing |
| RU2450113C1 (ru) * | 2010-12-29 | 2012-05-10 | Николай Митрофанович Панин | Буровая коронка |
| JP1569589S (de) * | 2016-07-14 | 2017-02-20 | ||
| JP1569597S (de) * | 2016-07-14 | 2017-02-20 | ||
| JP1569599S (de) * | 2016-07-14 | 2017-02-20 | ||
| US11306541B2 (en) | 2016-10-10 | 2022-04-19 | Tmt Tapping-Measuring-Technology Sarl | Drill bit |
Family Cites Families (19)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3548959A (en) * | 1969-07-10 | 1970-12-22 | Gulf Research Development Co | Relief-type jet bits |
| US3693736A (en) * | 1969-09-04 | 1972-09-26 | Mission Mfg Co | Cutter insert for rock bits |
| US4014395A (en) * | 1974-12-05 | 1977-03-29 | Smith-Williston, Inc. | Rock drill bit insert retaining sleeve assembly |
| US4047583A (en) * | 1976-06-01 | 1977-09-13 | Dresser Industries, Inc. | Earth boring cutting element retention system |
| DE2610734A1 (de) * | 1976-03-13 | 1977-09-22 | Krupp Gmbh | Mit schneid- und schlagstiften bestuecktes werkzeug zum abtragen von gesteinen und mineralien |
| DE3408225A1 (de) | 1984-03-07 | 1985-09-19 | Richard 5383 Kierspe Karnebogen | Schlagbohrkrone |
| US4660660A (en) * | 1985-05-17 | 1987-04-28 | Trw Inc. | Round/flat carbide seat |
| US4951672A (en) | 1985-07-02 | 1990-08-28 | General Electric Company | Controlled impedance monitoring lead wires |
| SE469395B (sv) | 1988-07-28 | 1993-06-28 | Sandvik Ab | Borrkrona med haardmetallskaer |
| ZA93584B (en) | 1992-05-27 | 1993-09-01 | De Beers Ind Diamond | Abrasive tools. |
| ZA935114B (en) | 1992-07-23 | 1994-02-08 | De Beers Ind Diamond | Abrasive tools |
| US5558170A (en) * | 1992-12-23 | 1996-09-24 | Baroid Technology, Inc. | Method and apparatus for improving drill bit stability |
| US6918455B2 (en) * | 1997-06-30 | 2005-07-19 | Smith International | Drill bit with large inserts |
| US5947215A (en) * | 1997-11-06 | 1999-09-07 | Sandvik Ab | Diamond enhanced rock drill bit for percussive drilling |
| EP0943780A3 (de) | 1998-03-18 | 2000-07-19 | Plica Werkzeugfabrik Ag | Bohrwerkzeug |
| FR2776307B1 (fr) | 1998-03-19 | 2000-06-23 | Staubli Sa Ets | Mecanisme de tirage pour mecanique d'armure et metier a tisser comprenant un tel mecanisme de tirage |
| SE515294C2 (sv) * | 1999-11-25 | 2001-07-09 | Sandvik Ab | Bergborrkrona och stift för slående borrning samt metod att tillverka en bergborrkrona för slående borrning |
| SE0000688L (sv) * | 2000-03-02 | 2001-05-21 | Sandvik Ab | Bergborrkrona samt förfarande för dess tillverkning |
| US6655480B1 (en) * | 2000-10-05 | 2003-12-02 | Kennametal Inc. | Cutting insert for percussion drill bit |
-
2002
- 2002-07-31 WO PCT/AT2002/000227 patent/WO2003012244A1/de not_active Ceased
- 2002-07-31 EP EP02759861A patent/EP1415065B1/de not_active Expired - Lifetime
- 2002-07-31 ES ES02759861T patent/ES2236562T3/es not_active Expired - Lifetime
- 2002-07-31 AT AT02759861T patent/ATE287024T1/de not_active IP Right Cessation
- 2002-07-31 DE DE50202009T patent/DE50202009D1/de not_active Expired - Fee Related
- 2002-08-01 AR ARP020102931A patent/AR035264A1/es unknown
- 2002-08-01 TW TW091117274A patent/TWI225431B/zh not_active IP Right Cessation
-
2004
- 2004-01-29 US US10/766,214 patent/US6926104B2/en not_active Expired - Fee Related
- 2004-02-11 ZA ZA200401101A patent/ZA200401101B/en unknown
Non-Patent Citations (1)
| Title |
|---|
| See references of WO03012244A1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| AR035264A1 (es) | 2004-05-05 |
| WO2003012244A1 (de) | 2003-02-13 |
| ZA200401101B (en) | 2007-01-31 |
| EP1415065B1 (de) | 2005-01-12 |
| US20040182610A1 (en) | 2004-09-23 |
| US6926104B2 (en) | 2005-08-09 |
| ES2236562T3 (es) | 2005-07-16 |
| ATE287024T1 (de) | 2005-01-15 |
| TWI225431B (en) | 2004-12-21 |
| DE50202009D1 (de) | 2005-02-17 |
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