EP0685629A2 - Rock drill bit - Google Patents
Rock drill bit Download PDFInfo
- Publication number
- EP0685629A2 EP0685629A2 EP95810187A EP95810187A EP0685629A2 EP 0685629 A2 EP0685629 A2 EP 0685629A2 EP 95810187 A EP95810187 A EP 95810187A EP 95810187 A EP95810187 A EP 95810187A EP 0685629 A2 EP0685629 A2 EP 0685629A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- discharge grooves
- drill
- drill head
- diametrically opposite
- grooves
- 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
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Classifications
-
- 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
- B28D1/14—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by boring or drilling
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- E—FIXED CONSTRUCTIONS
- E21—EARTH DRILLING; MINING
- E21B—EARTH DRILLING, e.g. DEEP 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 rock drill with a clamping shank, a drill shank having at least four parallel flutes arranged next to one another and a drill head connected to the drill shank and consisting entirely of hard metal with four discharge grooves distributed around the circumference, the clear cross sections of the discharge grooves and flutes coinciding.
- Rock drill bits of the type in question are used to produce bores in rock, concrete, masonry and the like. It is known that the rock drill bits in the area of the drill bit wear out extremely quickly when drilling in hard ground. For this reason, rock drills are equipped with hard metal, whereby hard metal is understood to mean sintered or melted carbides, silicates, borides or their alloys.
- Such a rock drill is known from US Pat. No. 2,673,716.
- This rock drill has a drill head made entirely of hard metal and connected to the drill shank, which has four discharge grooves arranged uniformly around the circumference and running in the longitudinal direction of the drill head.
- the drill head has a centrally arranged projection which projects into a corresponding recess in the drill shaft.
- the invention has for its object to provide a rock drill with a hard metal drill head, which is characterized by high drilling performance, long service life, smooth running and good drilling cuttings.
- this is achieved in that the removal grooves of the drill head have a differently sized, clear cross section.
- the larger discharge grooves form the main discharge channels and the further discharge grooves, which are made smaller, the secondary discharge channels.
- the clear cross sections of two first, diametrically opposite discharge grooves are preferably larger than the clear cross sections of two second, diametrically opposite discharge grooves.
- the clear cross-sections of the discharge grooves of different sizes can be formed by discharge grooves which expediently have a different radial distance from the center of the drill head.
- the two first, diametrically opposite discharge grooves expediently have a smaller radial extension than the two second, diametrically opposite discharge grooves.
- the radial extent of the first two removal grooves advantageously corresponds to 0.05 to 0.25 times the outside diameter of the drill head.
- the radial extent of the two second removal grooves preferably corresponds to 0.1 to 0.35 times the outside diameter of the drill head. Due to the relatively deep discharge grooves, the extension of the discharge grooves in the circumferential direction of the drill head can be kept small and that part of the circumference of the drill head which is supported on the borehole wall can be kept large.
- Different-sized, clear cross-sections of the discharge grooves can also be achieved in that the two first, diametrically opposite discharge grooves advantageously have a greater extent extending in the circumferential direction of a drill head than the two second, diametrically opposite discharge grooves.
- Good concentricity is achieved by expediently arranging the two first discharge grooves arranged diametrically opposite one another at an angle of 60 ° to 90 ° with respect to the two second discharge grooves lying diametrically opposite one another. If both of the diametrically opposed discharge grooves are aligned at an angle of approximately 60 °, two particularly large, diametrically opposed discharge grooves can be created, which serve for the good removal of the cuttings and which ensure high drilling progress.
- the discharge grooves are arranged running in the longitudinal direction of the drill head.
- the cuttings reach the flutes of the drill shank from the discharge grooves of the drill head, the flutes of the drill shank advantageously being of spiral design.
- the spiral flutes ensure that the removed cuttings are transported from the deepest part of the borehole to the surface of the borehole.
- the rock drill shown in FIGS. 1 and 2 has a clamping shank 1, a drilling shank 2 with four flutes 4, 5, 6, 7 arranged in parallel next to one another, which are of spiral design, and one connected to the drilling shank 2 as a whole made of hard metal drill head 3 with four evenly distributed discharge grooves 8, 9, 10, 11.
- the radial distances R1 from the center Z of the drill head 3 of two first, diametrically opposite discharge grooves 8, 10 are smaller than the radial distances R2 of two second, diametrically opposite discharge grooves 9, 11.
- At least one cutting edge 12 is arranged in the free end region of the drill head 3 of the rock drill shown in FIG. 1, which extends at least partially along the end face over the entire diameter of the drill head 3. This cutting edge 12 is used to remove drilling cuttings, not shown.
- the drill head 13 shown in FIG. 3 has four discharge grooves 14, 15, 16, 17 which are regularly distributed around the circumference.
- the clear cross sections of two first, diametrically opposite discharge grooves 14, 16 are larger than the clear cross sections of two second, diametrically opposite discharge grooves 15, 17.
- the extensions B1, B3 of the discharge grooves 14, 16 in the circumferential direction of the drill head 13 are larger, than the extensions B2, B4 of the discharge grooves 15, 17.
- the discharge grooves 14, 16 are arranged at an angle W of 90 ° with respect to the discharge grooves 15, 17.
- the drill head 23 shown in FIG. 4 has four discharge grooves 24, 25, 26, 27 distributed around the circumference, which run in the longitudinal direction of the drill head 23.
- the discharge grooves 24, 25, 26, 27 have a differently sized, clear cross section. Therefore, the discharge grooves 24, 25, 26, 27 have a different radial distance R3, R4, R5, R6 from the center Z of the drill head 23.
- the drill head 3 shown in FIGS. 1 and 2 has an outer diameter D which is essentially of the same size as the outer diameter of the drill shaft 2.
- the drill head 3 is connected to the drill shaft 2, for example, by a solder connection.
- Centering means in the form of projections on the drill head 3, which protrude into correspondingly designed recesses in the drill shank 2, not shown, are used for better centering during the soldering process and the formation of a larger connecting surface.
- These projections or depressions are arranged in particular in the central area of the rock drill.
- Such projections can be conical, for example.
Abstract
Description
Die Erfindung betrifft einen Gesteinsbohrer mit einem Einspannschaft, einem wenigstens vier parallel nebeneinander angeordnete Spannuten aufweisenden Bohrerschaft und einem mit dem Bohrschaft verbundenen, insgesamt aus Hartmetall bestehenden Bohrkopf mit vier am Umfang verteilt angeordneten Abfuhrnuten, wobei sich die lichten Querschnitte der Abfuhrnuten und Spannuten decken.The invention relates to a rock drill with a clamping shank, a drill shank having at least four parallel flutes arranged next to one another and a drill head connected to the drill shank and consisting entirely of hard metal with four discharge grooves distributed around the circumference, the clear cross sections of the discharge grooves and flutes coinciding.
Gesteinsbohrer der in Rede stehenden Art dienen der Herstellung von Bohrungen in Gestein, Beton, Mauerwerk und dgl. Es ist bekannt, dass sich die Gesteinsbohrer im Bereich der Bohrerspitze beim Bohren in hartem Untergrund ausserordentlich schnell abnutzen. Deshalb sind Gesteinsbohrer mit Hartmetall bestückt, wobei unter Hartmetall gesinterte oder geschmolzene Karbide, Silikate, Boride oder deren Legierungen verstanden werden.Rock drill bits of the type in question are used to produce bores in rock, concrete, masonry and the like. It is known that the rock drill bits in the area of the drill bit wear out extremely quickly when drilling in hard ground. For this reason, rock drills are equipped with hard metal, whereby hard metal is understood to mean sintered or melted carbides, silicates, borides or their alloys.
Ein derartiger Gesteinsbohrer ist aus der US-PS 2,673,716 bekannt. Dieser Gesteinsbohrer besitzt einen insgesamt aus Hartmetall bestehenden, mit dem Bohrerschaft verbundenen Bohrkopf, der vier gleichmässig am Umfang verteilt angeordnete Abfuhrnuten, die in Längsrichtung des Bohrkopfes verlaufen, aufweist. Für die Verbindung des Bohrkopfes mit dem Bohrerschaft besitzt der Bohrkopf einen zentral angeordneten Vorsprung, der in eine entsprechende Vertiefung des Bohrerschaftes ragt.Such a rock drill is known from US Pat. No. 2,673,716. This rock drill has a drill head made entirely of hard metal and connected to the drill shank, which has four discharge grooves arranged uniformly around the circumference and running in the longitudinal direction of the drill head. For the connection of the drill head to the drill shaft, the drill head has a centrally arranged projection which projects into a corresponding recess in the drill shaft.
Die stetige Abfuhr des Bohrkleins dieses bekannten Gesteinsbohrers während eines Bearbeitungsvorganges erfolgt über die in Längsrichtung des Bohrkopfes verlaufenden Abfuhrnuten zu den Spannuten des Bohrerschaftes. Die Spannuten des Bohrerschaftes sind spiralförmig ausgebildet und decken sich jeweils mit den Abfuhrnuten des Bohrkopfes. Da die lichten Querschnitte aller Abfuhrnuten des Bohrkopfes gleich gross sind, wird über jede Abfuhrnut gleich viel Bohrklein während des Bohrvorganges abgeführt. Bei der Abtragung von sehr weichem oder sprödem Material kann es zu einer Verklemmung von grosskömigem Bohrklein in den Abfuhrnuten kommen. Weiteres Bohrklein, das sich in den Abfuhrnuten ansammelt, drückt radial nach aussen gegen die Bohrlochwandung, so dass einerseits ein erhöhtes Drehmoment auf den Gesteinsbohrer aufgebracht werden muss, um den Gesteinsbohrer verdrehen zu können und andererseits eine Beschädigung der Bohrlochwandung, insbesondere hervorgerufen durch unruhigen Lauf des Gesteinsbohrers, entsteht.The continuous removal of the cuttings of this known rock drill during a machining process takes place via the discharge grooves running in the longitudinal direction of the drill head to the flutes of the drill shank. The flutes of the drill shank are spiral and each coincide with the removal grooves of the drill head. Since the clear cross-sections of all discharge grooves of the drill head are of the same size, the same amount of cuttings is discharged through each discharge groove during the drilling process. If very soft or brittle material is removed, large-diameter cuttings may become jammed in the discharge grooves. Additional cuttings that accumulate in the discharge grooves press radially outwards against the borehole wall, so that on the one hand an increased torque is applied to the rock drill must in order to be able to twist the rock drill and, on the other hand, damage to the wall of the borehole, in particular caused by uneven running of the rock drill, occurs.
Der Erfindung liegt die Aufgabe zugrunde, einen Gesteinsbohrer mit einem aus Hartmetall bestehenden Bohrkopf zu schaffen, der sich durch hohe Bohrleistung, hohe Standzeiten, ruhigen Lauf und eine gute Bohrkleinabfuhr auszeichnet.The invention has for its object to provide a rock drill with a hard metal drill head, which is characterized by high drilling performance, long service life, smooth running and good drilling cuttings.
Erfindungsgemäss wird dies dadurch erreicht, dass die Abfuhrnuten des Bohrkopfes einen unterschiedlich grossen, lichten Querschnitt aufweisen.According to the invention, this is achieved in that the removal grooves of the drill head have a differently sized, clear cross section.
Aufgrund der unterschiedlich grossen Abfuhrnuten kann Bohrklein unterschiedlicher Grösse gut abgeführt werden. Die grösseren Abfuhrnuten bilden dabei die Hauptabfuhrkanäle und die weiteren Abfuhrnuten, welche kleiner ausgebildet sind, die Nebenabfuhrkanäle.Due to the differently sized discharge grooves, cuttings of different sizes can be easily removed. The larger discharge grooves form the main discharge channels and the further discharge grooves, which are made smaller, the secondary discharge channels.
Um einen möglichst ruhigen Lauf des Gesteinsbohrers während des Bearbeitungsvorganges erreichen zu können, sind vorzugsweise die lichten Querschnitte von zwei ersten, einander diametral gegenüberliegenden Abfuhrnuten grösser, als die lichten Querschnitte von zwei zweiten, einander diametral gegenüberliegenden Abfuhrnuten.In order to ensure that the rock drill runs as smoothly as possible during the machining process, the clear cross sections of two first, diametrically opposite discharge grooves are preferably larger than the clear cross sections of two second, diametrically opposite discharge grooves.
Die unterschiedlich grossen lichten Querschnitte der Abfuhrnuten können gebildet sein von Abfuhrnuten, die zweckmässigerweise einen unterschiedlich grossen, radialen Abstand vom Zentrum des Bohrkopfes aufweisen.The clear cross-sections of the discharge grooves of different sizes can be formed by discharge grooves which expediently have a different radial distance from the center of the drill head.
Gute Rundlaufeigenschaften des Gesteinsbohrers werden dadurch erreicht, dass zweckmässigerweise die zwei ersten, einander diametral gegenüberliegenden Abfuhrnuten eine kleinere radiale Ersteckung aufweisen als die zwei zweiten, einander diametral gegenüberliegenden Abfuhrnuten.Good concentricity properties of the rock drill are achieved in that the two first, diametrically opposite discharge grooves expediently have a smaller radial extension than the two second, diametrically opposite discharge grooves.
Die radiale Erstreckung der zwei ersten Abfuhrnuten entspricht vorteilhafterweise dem 0,05- bis 0,25-fachen Aussendurchmesser des Bohrkopfes. Die radiale Erstreckung der zwei zweiten Abfuhrnuten entspricht dabei vorzugsweise dem 0,1- bis 0,35-fachen Aussendurchmesser des Bohrkopfes. Durch die relativ tief ausgebildeten Abfuhrnuten kann die Erstreckung der Abfuhrnuten in Umfangsrichtung des Bohrkopfes klein und jener Teil des Umfanges des Bohrkopfes, der sich an der Bohrlochwandung abstützt, gross gehalten werden.The radial extent of the first two removal grooves advantageously corresponds to 0.05 to 0.25 times the outside diameter of the drill head. The radial extent of the two second removal grooves preferably corresponds to 0.1 to 0.35 times the outside diameter of the drill head. Due to the relatively deep discharge grooves, the extension of the discharge grooves in the circumferential direction of the drill head can be kept small and that part of the circumference of the drill head which is supported on the borehole wall can be kept large.
Unterschiedlich grosse, lichte Querschnitte der Abfuhrnuten können auch dadurch erreicht werden, dass vorteilhafterweise die zwei ersten, einander diametral gegenüberliegenden Abfuhrnuten eine grössere, in Umfangsrichtung eines Bohrkopfes verlaufende Erstreckung aufweisen, als die zwei zweiten, einander diametral gegenüberliegenden Abfuhrnuten.Different-sized, clear cross-sections of the discharge grooves can also be achieved in that the two first, diametrically opposite discharge grooves advantageously have a greater extent extending in the circumferential direction of a drill head than the two second, diametrically opposite discharge grooves.
Gute Rundlaufeigenschaften werden dadurch erreicht, dass zweckmässigerweise die zwei ersten, einander diametral gegenüberliegend angeordneten Abfuhrnuten gegenüber den zwei zweiten, einander diametral gegenüberliegenden Abfuhrnuten unter einem Winkel von 60° bis 90° angeordnet sind. Bei einer Ausrichtung beider einander diametral gegenüberliegender Abfuhrnuten unter einem Winkel von ca. 60° können zwei besonders gross ausgebildete, einander diametral gegenüberliegende Abfuhrnuten geschaffen werden, die der guten Abfuhr des Bohrkleins dienen und die einen hohen Bohrfortschritt gewährleisten.Good concentricity is achieved by expediently arranging the two first discharge grooves arranged diametrically opposite one another at an angle of 60 ° to 90 ° with respect to the two second discharge grooves lying diametrically opposite one another. If both of the diametrically opposed discharge grooves are aligned at an angle of approximately 60 °, two particularly large, diametrically opposed discharge grooves can be created, which serve for the good removal of the cuttings and which ensure high drilling progress.
Um eine schnelle Abfuhr des Bohrkleins aus dem Bereich des Bohrkopfes gewährleisten zu können, sind die Abfuhrnuten in Längsrichtung des Bohrkopfes verlaufend angeordnet. Von den Abfuhrnuten des Bohrkopfes gelangt das Bohrklein zu den Spannuten des Bohrerschaftes, wobei die Spannuten des Bohrerschaftes vorteilhafterweise spiralförmig ausgebildet sind. Die spiralförmig ausgebildeten Spannuten gewährleisten einen Weitertransport des abgetragenen Bohrkleins aus dem Bereich des Bohrlochtiefsten an die Oberfläche des Bohrloches.In order to ensure rapid removal of the cuttings from the area of the drill head, the discharge grooves are arranged running in the longitudinal direction of the drill head. The cuttings reach the flutes of the drill shank from the discharge grooves of the drill head, the flutes of the drill shank advantageously being of spiral design. The spiral flutes ensure that the removed cuttings are transported from the deepest part of the borehole to the surface of the borehole.
Die Erfindung wird anhand von Zeichnungen, die mehrere Ausführungsbeispiele wiedergeben, näher erläutert. Es zeigen:
- Fig. 1
- einen erfindungsgemässen Gesteinsbohrer mit Einspannschaft, Bohrerschaft und Bohrkopf;
- Fig. 2
- einen Querschnitt durch den Bohrkopf des Gesteinsbohrers gemäss Fig. 1, in vergrösserter Darstellung;
- Fig. 3, 4
- Querschnitte durch Bohrköpfe weiterer erfindungsgemässer Gesteinsbohrer, in vergrösserter Darstellung.
- Fig. 1
- a rock drill according to the invention with a clamping shank, drill shank and drill head;
- Fig. 2
- a cross section through the drill head of the rock drill according to Figure 1, in an enlarged view.
- 3, 4
- Cross-sections through drill heads of further rock drills according to the invention, in an enlarged view.
Der in den Fig. 1 und 2 dargestellte Gesteinsbohrer besitzt einen Einspannschaft 1, einen Bohrschaft 2 mit vier parallel nebeneinander angeordneten Spannuten 4, 5, 6, 7, die spiralförmig ausgebildet sind und einen mit dem Bohrschaft 2 verbundenen, insgesamt aus Hartmetall bestehenden Bohrkopf 3 mit vier gleichmässig am Umfang verteilt angeordneten Abfuhrnuten 8, 9, 10, 11. Die radialen Abstände R1 vom Zentrum Z des Bohrkopfes 3 von zwei ersten, einander diametral gegenüberliegenden Abfuhrnuten 8, 10 sind kleiner als die radialen Abstände R2 von zwei zweiten, einander diametral gegenüberliegenden Abfuhrnuten 9,11.The rock drill shown in FIGS. 1 and 2 has a
Im freien Endbereich des Bohrkopfes 3 des in Fig. 1 dargestellten Gesteinsbohrers ist wenigstens eine Schneidkante 12 angeordnet, die sich wenigstens teilweise entlang der Stimseite über den gesamten Durchmesser des Bohrkopfes 3 erstreckt. Diese Schneidkante 12 dient dem Abtragen von nicht dargestelltem Bohrklein.At least one
Der in Fig. 3 dargestellte Bohrkopf 13 hat vier Abfuhrnuten 14,15, 16,17, die regelmässig am Umfang verteilt angeordnet sind. Die lichten Querschnitte von zwei ersten, einander diametral gegenüberliegenden Abfuhrnuten 14, 16 sind grösser als die lichten Querschnitte von zwei zweiten, einander diametral gegenüberliegenden Abfuhrnuten 15, 17. Die Erstreckungen B1, B3 der Abfuhrnuten 14, 16 in Umfangsrichtung des Bohrkopfes 13 sind grösser, als die Erstreckungen B2, B4 der Abfuhrnuten 15, 17. Die Abfuhrnuten 14, 16 sind gegenüber den Abfuhrnuten 15, 17 unter einem Winkel W von 90° angeordnet.The
Der in Fig. 4 dargestellte Bohrkopf 23 besitzt vier am Umfang verteilt angeordnete Abfuhrnuten 24, 25, 26, 27, die in Längsrichtung des Bohrkopfes 23 verlaufen. Die Abfuhrnuten 24, 25, 26, 27 weisen einen unterschiedlich grossen, lichten Querschnitt auf. Daher besitzen die Abfuhrnuten 24, 25, 26, 27 einen unterschiedlich grossen radialen Abstand R3, R4, R5, R6 vom Zentrum Z des Bohrkopfes 23.The
Der in den Fig. 1 und 2 dargestellte Bohrkopf 3 besitzt einen Aussendurchmesser D, der im wesentlichen gleich gross ausgebildet ist als der Aussendurchmesser des Bohrerschaftes 2.The
Der Bohrkopf 3 ist beispielsweise durch eine Lötverbindung mit dem Bohrerschaft 2 verbunden. Der besseren Zentrierung während des Lötvorganges und der Bildung einer grösseren Verbindungsfläche dienen nicht dargestellte Zentriermittel in Form von Vorsprüngen am Bohrkopf 3, die in entsprechend ausgebildete, nicht dargestellte Vertiefungen des Bohrerschaftes 2 ragen. Diese Vorsprünge bzw. Vertiefungen sind insbesondere im zentralen Bereich des Gesteinsbohrers angeordnet. Solche Vorsprünge können beispielsweise kegelförmig ausgebildet sein.The
Claims (9)
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4419641A DE4419641A1 (en) | 1994-06-04 | 1994-06-04 | Rock drill |
| DE4419641 | 1994-06-04 |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| EP0685629A2 true EP0685629A2 (en) | 1995-12-06 |
| EP0685629A3 EP0685629A3 (en) | 1996-12-18 |
| EP0685629B1 EP0685629B1 (en) | 2002-08-14 |
Family
ID=6519846
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP95810187A Expired - Lifetime EP0685629B1 (en) | 1994-06-04 | 1995-03-20 | Rock drill bit |
Country Status (16)
| Country | Link |
|---|---|
| US (1) | US5553682A (en) |
| EP (1) | EP0685629B1 (en) |
| JP (1) | JPH07329049A (en) |
| KR (1) | KR960000438A (en) |
| CN (1) | CN1116683A (en) |
| AT (1) | ATE222321T1 (en) |
| AU (1) | AU690659B2 (en) |
| CA (1) | CA2150164C (en) |
| CZ (1) | CZ82895A3 (en) |
| DE (2) | DE4419641A1 (en) |
| DK (1) | DK0685629T3 (en) |
| ES (1) | ES2181759T3 (en) |
| FI (1) | FI108622B (en) |
| HU (1) | HU216598B (en) |
| PL (1) | PL308889A1 (en) |
| TW (1) | TW284718B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1190797A1 (en) * | 2000-09-25 | 2002-03-27 | HILTI Aktiengesellschaft | Drilling tool |
| CN105108211A (en) * | 2015-09-15 | 2015-12-02 | 深圳市金洲精工科技股份有限公司 | Staggered tooth blade drilling bit |
| EP3437773A1 (en) * | 2017-08-03 | 2019-02-06 | DreBo Werkzeugfabrik GmbH | Drill |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19707115A1 (en) * | 1997-02-22 | 1998-08-27 | Hilti Ag | Drilling and / or chisel tools |
| DE10009732A1 (en) | 2000-03-02 | 2001-09-06 | Hawera Probst Gmbh | Rock drill has drill head, spiral conveyor with main and subsidiary webs, conveyor edges, main and subsidiary cutter-blades. |
| KR20010051858A (en) * | 2000-11-22 | 2001-06-25 | 윤광근 | breaker chisel |
| CN100528093C (en) | 2002-08-08 | 2009-08-19 | 瑟吉比特Ip控股有限公司 | A drill bit and method for producing a drill bit |
| GB2393681A (en) * | 2002-10-03 | 2004-04-07 | Black & Decker Inc | Masonry drilling tool |
| US8146256B2 (en) * | 2003-10-31 | 2012-04-03 | Stanley Black & Decker, Inc. | Metal demolition shears with indexable, integrated wear plate/piercing tip |
| DE102004028099A1 (en) * | 2004-06-09 | 2005-12-29 | Hilti Ag | drill |
| GB2433905B (en) * | 2006-01-06 | 2009-07-15 | Kuldip Singh Kanth | Apparatus for use in the installation of a shower enclosure |
| DE102006000208A1 (en) * | 2006-04-28 | 2007-10-31 | Hilti Ag | Rotary hammer drill with four-turn drill bit shank |
| DE102007062539B4 (en) * | 2006-12-21 | 2012-08-23 | Stefan Rothenaicher | drilling |
| DE202006019501U1 (en) * | 2006-12-21 | 2008-04-30 | Rothenaicher, Stefan | drilling |
| DE102006035306A1 (en) | 2006-12-22 | 2008-06-26 | Hilti Ag | Rotary impact drill with hard material insert |
| DE102007000486A1 (en) | 2007-09-05 | 2009-03-12 | Hilti Aktiengesellschaft | Strengthening brittle hard material surfaces, e.g. in inserts for tools for processing brittle workpieces, involves laser shock hammering by applying laser impulses to generate plasma bubble |
| US20090148250A1 (en) * | 2007-12-05 | 2009-06-11 | Wayne Chappell | Drill Bit |
| EP2116321B1 (en) | 2008-05-09 | 2014-01-08 | Irwin Industrial Tool Company | Boring tool, in particular twist drill |
| DE102008022945A1 (en) | 2008-05-09 | 2009-12-03 | Irwin Industrial Tools Gmbh | Drilling tool, in particular twist drills |
| US7861807B2 (en) * | 2008-12-03 | 2011-01-04 | Black & Decker Inc. | Drill bit including one piece cutting head |
| CN103433535B (en) * | 2013-08-26 | 2015-11-04 | 深圳市金洲精工科技股份有限公司 | A kind of microbit |
| DE102014203327A1 (en) * | 2014-02-25 | 2015-08-27 | Robert Bosch Gmbh | drilling |
| CN104493263A (en) * | 2014-09-28 | 2015-04-08 | 上海奥林汽车安全系统有限公司 | Double-edge band twist drill with high machining precision |
| US11679442B2 (en) | 2018-06-22 | 2023-06-20 | Maestro Logistics, Llc | Drill bit and method for making a drill bit |
| US11948700B2 (en) | 2020-11-11 | 2024-04-02 | Grant Charters | In-situ method of drilling to collect dry samples from a nuclear reactor core interior for analysis |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB512830A (en) * | 1938-03-17 | 1939-09-27 | John Joseph Rawlings | Improvements in percussion drills |
| US2370706A (en) * | 1943-11-29 | 1945-03-06 | Rudolf W Andreasson | Drill |
| US2673716A (en) * | 1950-09-02 | 1954-03-30 | Clyde E Avery | Bit |
| EP0452255B1 (en) * | 1990-04-09 | 1994-12-14 | HILTI Aktiengesellschaft | Stone drill bit |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US750537A (en) * | 1904-01-26 | Drilling-tool | ||
| US580398A (en) * | 1897-04-13 | Peter j | ||
| US599537A (en) * | 1898-02-22 | Martin steudner | ||
| US2217202A (en) * | 1939-10-19 | 1940-10-08 | Rawlplug Company Inc | Percussion drill |
| US3089354A (en) * | 1959-10-30 | 1963-05-14 | Spiralbohrer Und Werkzeugfabri | Method for the production of cutting tools |
| CH626557A5 (en) * | 1978-09-28 | 1981-11-30 | Guex Philippe & Fils Sa | |
| US4898503A (en) * | 1988-07-05 | 1990-02-06 | Lockheed Corporation | Twist drill |
| US5297456A (en) * | 1990-02-07 | 1994-03-29 | Gn Tool Co., Ltd. | Cutting tool with twisted edge and manufacturing method thereof |
| US5265688A (en) * | 1990-04-09 | 1993-11-30 | Hilti Aktiengesellschaft | Rock drill |
| SE507842C2 (en) * | 1992-09-24 | 1998-07-20 | Sandvik Ab | Drill |
-
1994
- 1994-06-04 DE DE4419641A patent/DE4419641A1/en not_active Withdrawn
-
1995
- 1995-03-20 DE DE59510316T patent/DE59510316D1/en not_active Expired - Lifetime
- 1995-03-20 EP EP95810187A patent/EP0685629B1/en not_active Expired - Lifetime
- 1995-03-20 ES ES95810187T patent/ES2181759T3/en not_active Expired - Lifetime
- 1995-03-20 AT AT95810187T patent/ATE222321T1/en not_active IP Right Cessation
- 1995-03-20 DK DK95810187T patent/DK0685629T3/en active
- 1995-03-31 CZ CZ95828A patent/CZ82895A3/en unknown
- 1995-04-26 KR KR1019950009888A patent/KR960000438A/en active IP Right Grant
- 1995-05-09 TW TW084104604A patent/TW284718B/zh active
- 1995-05-25 CA CA002150164A patent/CA2150164C/en not_active Expired - Fee Related
- 1995-05-26 FI FI952565A patent/FI108622B/en active
- 1995-05-30 AU AU20395/95A patent/AU690659B2/en not_active Ceased
- 1995-06-02 CN CN95107179A patent/CN1116683A/en active Pending
- 1995-06-02 PL PL95308889A patent/PL308889A1/en unknown
- 1995-06-02 HU HU9501624A patent/HU216598B/en not_active IP Right Cessation
- 1995-06-05 JP JP7138039A patent/JPH07329049A/en active Pending
- 1995-06-07 US US08/474,846 patent/US5553682A/en not_active Expired - Lifetime
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB512830A (en) * | 1938-03-17 | 1939-09-27 | John Joseph Rawlings | Improvements in percussion drills |
| US2370706A (en) * | 1943-11-29 | 1945-03-06 | Rudolf W Andreasson | Drill |
| US2673716A (en) * | 1950-09-02 | 1954-03-30 | Clyde E Avery | Bit |
| EP0452255B1 (en) * | 1990-04-09 | 1994-12-14 | HILTI Aktiengesellschaft | Stone drill bit |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1190797A1 (en) * | 2000-09-25 | 2002-03-27 | HILTI Aktiengesellschaft | Drilling tool |
| CN105108211A (en) * | 2015-09-15 | 2015-12-02 | 深圳市金洲精工科技股份有限公司 | Staggered tooth blade drilling bit |
| EP3437773A1 (en) * | 2017-08-03 | 2019-02-06 | DreBo Werkzeugfabrik GmbH | Drill |
Also Published As
| Publication number | Publication date |
|---|---|
| TW284718B (en) | 1996-09-01 |
| ATE222321T1 (en) | 2002-08-15 |
| FI952565A (en) | 1995-12-05 |
| FI952565A0 (en) | 1995-05-26 |
| DE4419641A1 (en) | 1995-12-07 |
| AU690659B2 (en) | 1998-04-30 |
| HUT71760A (en) | 1996-01-29 |
| FI108622B (en) | 2002-02-28 |
| CN1116683A (en) | 1996-02-14 |
| HU216598B (en) | 1999-07-28 |
| KR960000438A (en) | 1996-01-25 |
| US5553682A (en) | 1996-09-10 |
| AU2039595A (en) | 1995-12-14 |
| HU9501624D0 (en) | 1995-07-28 |
| DE59510316D1 (en) | 2002-09-19 |
| CA2150164A1 (en) | 1995-12-05 |
| CZ82895A3 (en) | 1995-12-13 |
| CA2150164C (en) | 2001-02-27 |
| EP0685629B1 (en) | 2002-08-14 |
| EP0685629A3 (en) | 1996-12-18 |
| ES2181759T3 (en) | 2003-03-01 |
| PL308889A1 (en) | 1995-12-11 |
| DK0685629T3 (en) | 2002-12-02 |
| JPH07329049A (en) | 1995-12-19 |
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