EP0790387B1 - Gesteinsbohrer sowie Verfahren zu dessen Herstellung - Google Patents
Gesteinsbohrer sowie Verfahren zu dessen Herstellung Download PDFInfo
- Publication number
- EP0790387B1 EP0790387B1 EP97100123A EP97100123A EP0790387B1 EP 0790387 B1 EP0790387 B1 EP 0790387B1 EP 97100123 A EP97100123 A EP 97100123A EP 97100123 A EP97100123 A EP 97100123A EP 0790387 B1 EP0790387 B1 EP 0790387B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- flanks
- drill
- rock drill
- set forth
- head
- 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
Links
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 8
- 239000011435 rock Substances 0.000 title claims description 42
- 238000005520 cutting process Methods 0.000 claims abstract description 19
- 238000005476 soldering Methods 0.000 claims description 12
- 238000003466 welding Methods 0.000 claims description 10
- 238000000034 method Methods 0.000 claims description 3
- 238000003754 machining Methods 0.000 claims 1
- 229910052751 metal Inorganic materials 0.000 abstract description 79
- 239000002184 metal Substances 0.000 abstract description 79
- 238000005553 drilling Methods 0.000 description 8
- 238000004026 adhesive bonding Methods 0.000 description 6
- 229910000679 solder Inorganic materials 0.000 description 6
- 239000000853 adhesive Substances 0.000 description 4
- 230000001070 adhesive effect Effects 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 4
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 230000001010 compromised effect Effects 0.000 description 1
- 230000003292 diminished effect Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 230000005923 long-lasting effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
Images
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
- E21B10/58—Chisel-type inserts
Definitions
- the invention relates to a rock drill according to the preamble of claim 1 and a method for its manufacture.
- cutting inserts are used Made of hard metal with at least one cutting edge Headboard and with the geometry of a receiving groove in the drilling tool adapted foot part in one or more cut or milled grooves of a drill head or a core bit and in it by soldering attached.
- the grooves are generally considered ordinary continuous rectangular grooves with a constant cross-section.
- the hard metal plate is usually caused by caulking in the area of the openings of the receiving grooves Fixed surface of the drill head or the drill bit. This Caulking is usually done before the onset of Tungsten carbide plate executed in the receiving groove. The caulking prevent a radial displacement of the used hard metal plate and on the other hand falling out the plate during subsequent fastening by soldering, Welding or gluing. In addition, the Caulking that between the wall of the receiving groove and the a gap is kept free when using the hard metal plate, into which the molten solder due to capillary forces can penetrate.
- the receiving groove is an increased pressure on the Carbide plate exercised.
- the hard metal plate is either already damaged when inserting into the slot or there is an increased risk of breakage when operating the rock drill due to a chiseling effect of the caulking on the hard metal plate, which then breaks the hard metal plate effected at the pressure point.
- a hard metal plate for Drilling tools with at least one cutting edge Headboard and one of the geometry of a receiving groove in the Drilling tool adapted foot part known, in which the distance between the side surfaces of the foot part in at least one Section of the foot part is larger than in the edge area of the Side surfaces of the foot section.
- the invention has for its object one with To provide carbide-tipped rock drill, which is such that there is between hard metal plate and receiving groove in the drilling tool a stable and permanent Connection results that is easily soldered or otherwise can be securely centered on the hard metal plate enables and the risk of breakage when operating the Rock drill diminished.
- the side walls of the receiving groove run apart from the the section with the greater distance between the side surfaces wall areas corresponding to the hard metal plate, preferably essentially parallel to each other so that the previous configuration of a rectangular groove are retained can.
- the hard metal plate or the receiving groove can also one to the bottom of the hard metal plate or Have tapered cross-section groove bottom without the purpose of the invention is compromised. It is essential that the foot part of the hard metal plate inserted into the receiving groove a section with a larger distance between the two side faces, i.e. a section with a larger clear width, which corresponds to one molded wall area engages the receiving groove, so that ensures a secure centering of the hard metal plate and at the same time a shift in the radial direction is prevented.
- the part-circular bulges are preferably on formed on both side surfaces of the hard metal plate and lie towards each other.
- the bulges on the side surfaces The hard metal plate can also be used against each other be staggered. Those are particularly preferred Bulges approximately in the middle of at least one of the side surfaces arranged the hard metal plate.
- the hard metal plate with Cutting tips are provided, which additional smashing of rock.
- the cutting tips are preferred arranged in the region of the bulges of the foot part and by extending this area over the Foot part or between the head part and the side surfaces formed edge of the foot part also formed.
- the rock drill In the rock drill according to the invention, it is in the receiving groove carbide plate used by caulking on the end face of the drill head, preferably in the area the bulge, secured against falling out.
- the caulking overlaps the between the side surface of the Tungsten carbide plate and its edge formed edge. Thereby any pressure on the hard metal plate is avoided and the risk of breakage due to the chiseling effect of the caulking eliminated.
- the inventive design of the hard metal plate and the receiving groove enables precise alignment or centering of the hard metal plate prevented reliable displacement in the radial direction and reduces the loads on the hard metal plate.
- the inventive design achieved that the hard metal plate in the subsequent Soldering, fastening by welding or gluing in centered the receiving groove itself.
- the invention Rock drill can use an ordinary drill head only one at least over the entire diameter of the drill head extending carbide or insert but a core bit with two, three or more carbide inserts possess that either star-shaped or themselves are arranged crossing.
- the drill can be known A hard metal cutting plate designed as a centering tip exhibit.
- Tungsten carbide plate 10 has two main cutting edges on its head part 14 12.
- the side surfaces adjoin the head part 14 18, 20 of the foot part 16, which are essentially parallel run to each other and meet the headboard 14 form the edge 22.
- the foot part is the distance between the side surfaces 18, 20 of the foot part 16 larger than in the edge region of the side surfaces the foot part, d. H. here in the area of the end faces 26 the hard metal plate 10.
- section 24 presents itself as a part-circular Bulge of the side surface 18 represents Embodiment of the hard metal plate 10 shown here is the bulge 24 approximately in the middle of the side surface 18 arranged. It extends in the vertical direction in the substantially over the entire height of the side surface 18 of the Foot part 16. Deviating from the embodiment shown here the bulge 24 can also be at another location the side surface 18 and there may be several Bulges 24 may be provided.
- Figure 3 shows a plan view of a further embodiment the hard metal plate 10, in which the semi-circular bulge 24 both on the side surface 18 and on the side surface 20 is formed.
- the embodiment shown here has the bulges 24 facing each other and are approximately in the middle of the side faces 18 and 20 arranged.
- bulges 24 offset from each other.
- each side surface 18 or 20 several, preferably opposite bulges 24 may be formed.
- Figure 4 shows a further embodiment of a Hard metal plate 10.
- the head part 14 of this hard metal plate carries a cutting edge 12 and is in the range of radially outward after insertion into the drill head End face 28 chamfered.
- the distance between the apart from section 24 substantially parallel to each other trending side surfaces 18 and 20 is within the middle section 24 larger than in the region of the end face 28 or the back surface 30.
- the section 24 extends vertically over the entire height of the side surface 18 and / or the side surface 20 and is, in plan view of the Head part 14 of the hard metal plate 10 seen, preferably partially circular.
- the arrangement of the bulge 24 may be the same as those related to the embodiments described in Figures 1 to 3, in particular can have one or more bulges on one or both side surfaces 18, 20 of the hard metal plate 10 be provided.
- the hard metal plate 10 can also, in addition to those on the cutting edge 12, one or more Wear cutting tips 13.
- the cutting tips 13 are in the embodiments shown in FIGS. 5a to 5d in the area of the part-circular bulges 24 arranged and by an extension of these sections over the foot section or between the head section and the side surfaces of the foot portion formed edge 22 also formed.
- Rock drill carries a drill head on its shaft 32 34 with a receiving groove 36 which is rectangular in cross section
- the receiving groove extends over the entire diameter of the Drill shaft 32.
- a hard metal plate 10 according to the embodiment shown in Figure 3 used.
- the geometry of the foot part of the hard metal plate 10 is adapted to the geometry of the receiving groove.
- the bulges 24 in the side surfaces the hard metal plate in plan view of the drill head Partially circular recesses in the walls of the receiving groove 36.
- caulking 38 is formed, which overlap the edge 22 and so the hard metal plate secure against falling out of the receiving groove 36 without however, exert pressure on the hard metal plate 10.
- the shaft 32 carries a drill bit 34 with three Star-shaped carbide inserts according to the embodiment shown in Figure 4. Furthermore owns the rock drill another carbide insert in the form of a centering pin 40.
- the drill bit 34 In the drill bit 34 are three rectangular in cross section Milled grooves 36.
- the walls of the grooves each have the bulges 24 of the side surfaces of the Hard metal plate 10 corresponding, partially circular in plan view Recesses on.
- In the area of these recesses or the bulges 24 are on the end face 37 of the Drill bit 34 caulking 38 formed which the between the head part 14 and the side surfaces of the foot part of the Grip hard metal plate 10 formed edge 22.
- the caulking reliably prevent the hard metal plates from falling out 10 during the subsequent connection or fastening by soldering, welding or gluing.
- the centering pin 40 preferably carries on its underside a square 42, which in a corresponding opening 44, preferably bore in which the drill bit 34 is pressed. In this way, the centering pin 40 is centered and held when later connecting or fastening.
- the procedure is such that the grooves are milled out first and the geometry of the foot part of the one to be used Tungsten carbide plates can be adapted.
- the top view partially circular bulges of the side walls of the hard metal plates corresponding recesses in the walls of the Recording grooves can be advantageously by a Drill or mill the groove at the desired one Be made.
- the corresponding ones Prevent lateral bulges or recesses a radial displacement of the hard metal plates.
Landscapes
- Engineering & Computer Science (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Fluid Mechanics (AREA)
- Environmental & Geological Engineering (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Geochemistry & Mineralogy (AREA)
- Earth Drilling (AREA)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
- Drilling And Boring (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
- Devices For Post-Treatments, Processing, Supply, Discharge, And Other Processes (AREA)
Description
Claims (15)
- Gesteinsbohrer mit einem Schaft (32), einem Bohrkopf oder einer Bohrkrone (34) und mindestens einer Hartmetallplatte (10), die in wenigstens eine Aufnahmenut (36) des Bohrkopfes (34) eingesetzt und darin durch Verlöten, Verschweißen oder Verkleben befestigt ist, dadurch gekennzeichnet, daß die Hartmetallplatte (10) ein wenigstens eine Schneidkante (12) tragendes Kopfteil (14) und ein Fußteil (16) mit an das Kopfteil angrenzenden Seitenflächen (18, 20) aufweist, wobei der Abstand zwischen den Seitenflächen (18, 20) des Fußteils (16) in wenigstens einem Abschnitt (24) des Fußteils größer ist als im Randbereich der Seitenflächen (18, 20) des Fußteils, wobei die Geometrie der Aufnahmenut (36) und des Fußteils (16) aneinander angepaßt sind, und wobei die mindestens eine Hartmetallplatte (10) durch eine oder mehrere Verstemmungen (38) an der Stirnfläche (37) des Bohrkopfes (34) gegen ein Herausfallen gesichert ist, wobei die Verstemmungen (38) eine am Zusammentreffen der Seitenflächen (18, 20) und des Kopfteils (14) gebildete Kante (22) übergreifen.
- Gesteinsbohrer nach Anspruch 1, dadurch gekennzeichnet, daß die Seitenflächen (18, 20), abgesehen von dem Abschnitt (24) mit dem größeren Abstand zwischen den Seitenflächen (18, 20), im wesentlichen parallel zueinander verlaufen.
- Gesteinsbohrer nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Abschnitt (24) mit dem größeren Abstand zwischen den Seitenflächen (18, 20) in der Mitte des Fußteils (16) gebildet ist.
- Gesteinsbohrer nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß der Abschnitt (24) mit dem größeren Abstand zwischen den Seitenflächen (18, 20) durch wenigstens eine, in Draufsicht auf das Kopfteil im wesentlichen teilkreisförmige Ausbuchtung (24) einer oder beider Seitenflächen (18, 20) des Fußteils (16) gebildet ist.
- Gesteinsbohrer nach Anspruch 4, dadurch gekennzeichnet, daß die auf beiden Seitenflächen (18, 20) gebildeten Ausbuchtungen (24) jeweils einander gegenüberliegen.
- Gesteinsbohrer nach Anspruch 4, dadurch gekennzeichnet, daß die auf beiden Seitenflächen (18, 20) gebildeten Ausbuchtungen (24) jeweils gegeneinander versetzt angeordnet sind.
- Gesteinsbohrer nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß zusätzlich zu den Schneidkanten (12) eine oder mehrere Schneidspitzen (13) vorgesehen sind.
- Gesteinsbohrer nach Anspruch 7, dadurch gekennzeichnet, daß die Schneidspitzen (13) durch eine Verlängerung des Abschnitts (24) mit dem größeren Abstand zwischen den Seitenflächen (18, 20) über das Fußteil (16) hinaus gebildet sind.
- Gesteinsbohrer nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Verstemmungen (38) im Bereich des Abschnitts (24) mit dem größeren Abstand zwischen den Seitenflächen (18, 20) gebildet sind.
- Gesteinsbohrer nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß sich die Hartmetallplatte (10) mindestens über den gesamten Durchmesser des Bohrkopfes (34) erstreckt.
- Gesteinsbohrer nach einem der Ansprüche 1 bis 9, dadurch gekennzeichnet, daß in die Bohrkrone (34) wenigstens drei Hartmetallplatten (10) eingesetzt sind.
- Gesteinsbohrer nach Anspruch 11, dadurch gekennzeichnet, daß eine zusätzliche Hartmetallplatte in Form eines Zentrierstiftes (40) vorgesehen ist.
- Gesteinsbohrer nach Anspruch 12, dadurch gekennzeichnet, daß der Zentrierstift (40) an seiner Unterseite einen Vierkant (42) trägt, der in eine Öffnung oder Bohrung (44) in der Bohrkrone (34) eingepreßt ist.
- Verfahren zur Herstellung eines Gesteinsbohrers gemäß den Ansprüchen 1 bis 13, welches die folgenden Schritte umfaßt:(a) Einbringen wenigstens einer Aufnahmenut (36) in die Stirnfläche (37) eines Bohrkopfes oder einer Bohrkrone (34);(b) Einsetzen der Hartmetallplatte (10) in die Aufnahmenut (36), wobei die Hartmetallplatte (10) ein wenigstens eine Schneidkante (12) tragendes Kopfteil (14) und ein Fußteil (16) mit an das Kopfteil angrenzenden Seitenflächen (18, 20) aufweist, wobei der Abstand zwischen den Seitenflächen (18, 20) des Fußteils (16) in wenigstens einem Abschnitt (24) des Fußteils größer ist als im Randbereich der Seitenflächen (18, 20) und die Geometrie des Fußteils (16) und der Aufnahmenut (36) aneinander angepaßt sind;(c) Verstemmen eines die Seitenflächen (18, 20) der eingesetzten Hartmetallplatte (10) überhöhenden Wandabschnitts der Aufnahmenut (36) an der Stirnfläche (37) des Bohrkopfes oder der Bohrkrone (34) zur Ausbildung wenigstens einer Verstemmung (38), welche eine am Zusammentreffen des Kopfteils (14) und der Seitenflächen (18, 20) gebildete Kante (22) übergreift, wodurch die Hartmetallplatte gegen ein Herausfallen gesichert wird; und(d) Verbinden der Hartmetallplatte (10) mit dem Bohrkopf (34) durch Löten, Schweißen oder Kleben.
- Verfahren nach Anspruch 14, dadurch gekennzeichnet, daß der Wandabschnitt der Aufnahmenut (36) im Bereich des Abschnitts (24) mit dem größeren Abstand zwischen den Seitenflächen (18, 20) des Fußteils (16) verstemmt wird.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19601356 | 1996-01-16 | ||
DE19601356A DE19601356A1 (de) | 1996-01-16 | 1996-01-16 | Hartmetallplatte und damit bestückter Gesteinsbohrer sowie Verfahren zu dessen Herstellung |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0790387A1 EP0790387A1 (de) | 1997-08-20 |
EP0790387B1 true EP0790387B1 (de) | 2000-07-12 |
Family
ID=7782880
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP97100123A Expired - Lifetime EP0790387B1 (de) | 1996-01-16 | 1997-01-07 | Gesteinsbohrer sowie Verfahren zu dessen Herstellung |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP0790387B1 (de) |
AT (1) | ATE194685T1 (de) |
DE (2) | DE19601356A1 (de) |
DK (1) | DK0790387T3 (de) |
ES (1) | ES2151194T3 (de) |
GR (1) | GR3034567T3 (de) |
PT (1) | PT790387E (de) |
Families Citing this family (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19810193A1 (de) * | 1998-03-10 | 1999-09-16 | Hilti Ag | Bohrwerkzeug |
DE19811887A1 (de) * | 1998-03-18 | 1999-09-23 | Plica Werkzeugfabrik Ag Mollis | Hammerbohrwerkzeug |
DE29806084U1 (de) * | 1998-04-02 | 1998-07-30 | Plica Werkzeugfabrik Ag, Mollis | Hartmetallplatte und damit bestückter Gesteinsbohrer |
DE29816202U1 (de) * | 1998-09-09 | 1999-01-21 | Plica Werkzeugfabrik Ag, Mollis | Bohrwerkzeug |
DE19915304B4 (de) * | 1999-03-22 | 2006-07-27 | Robert Bosch Gmbh | Bohrwerkzeug |
AU2003264922A1 (en) * | 2002-09-20 | 2004-04-08 | Boart Longyear Gmbh And Co Kg | Rotary boring bit with cutting insert retaining means |
DE20314813U1 (de) | 2003-09-24 | 2004-03-04 | Berner Gmbh | Bohrer mit sternförmigem Hartmetalleinsatz |
DE102006000410A1 (de) * | 2006-08-21 | 2008-02-28 | Hilti Ag | Bohrwerkzeug mit Hartstoffeinsatz |
EP4375476A1 (de) * | 2022-11-22 | 2024-05-29 | Hilti Aktiengesellschaft | Gesteinsbohrer mit fünf schneiden |
Family Cites Families (16)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
FR1037757A (fr) * | 1950-06-22 | 1953-09-22 | Sandvikens Jernverks Ab | Lame rapportée pour fleurets de perforatrices à percussion |
AT350334B (de) * | 1977-01-19 | 1979-05-25 | Sfs Stadler Ag | Selbstbohrende schraube |
GB2002661A (en) * | 1977-08-18 | 1979-02-28 | Spencer & Sons Ltd | Improvements in cutting edges of rotary drills and drill bits |
US4314616A (en) * | 1980-01-28 | 1982-02-09 | Acme-Cleveland Corporation | Die-cast masonry drill with leading hard insert |
DE3047599A1 (de) * | 1980-12-17 | 1982-07-08 | Sortimat Creuz & Co Gmbh, 7057 Winnenden | "verfahren und vorrichtung zum anbringen einer hartmetallplatte am kopf eines spiralbohrers" |
DE3277111D1 (en) * | 1982-06-10 | 1987-10-08 | Seco Tools Ab | Cutting tool and cutting insert therefor |
US4488840A (en) * | 1982-07-08 | 1984-12-18 | Pollington Bernard M | Rotary cutting tool |
DE8315355U1 (de) * | 1983-05-25 | 1983-12-01 | B.B.W. Bayrische Bohrerwerke GmbH & Co KG, 8391 Büchlberg | Hartmetallplatte |
LU85697A1 (fr) * | 1984-12-20 | 1985-07-24 | Cerametal Sarl | Procede de fabrication d'une meche de forage et plaquette en metal dur pour sa mise en oeuvre |
DE3602427A1 (de) * | 1986-01-28 | 1987-07-30 | Stellram Gmbh | Werkzeug zur spanenden formung |
US4854789A (en) * | 1987-10-27 | 1989-08-08 | Nytd Industries Inc. | Cutting tool assembly |
DE4003375C1 (de) * | 1990-02-05 | 1991-05-23 | Sfs Stadler Holding Ag, Heerbrugg, Ch | |
DE69112665T2 (de) * | 1990-02-20 | 1996-04-04 | Sumitomo Electric Industries | Bohrer mit Einwegschneideinsatz. |
US5287937A (en) * | 1992-06-30 | 1994-02-22 | The Sollami Company | Drill bits and the blades therefor |
US5458210A (en) * | 1993-10-15 | 1995-10-17 | The Sollami Company | Drill bits and blades therefor |
DE4406513A1 (de) | 1994-02-28 | 1995-08-31 | Plica Werkzeugfabrik Ag | Hartmetallplatte und damit bestückter Gesteinsbohrer |
-
1996
- 1996-01-16 DE DE19601356A patent/DE19601356A1/de not_active Withdrawn
-
1997
- 1997-01-07 DE DE59701985T patent/DE59701985D1/de not_active Expired - Lifetime
- 1997-01-07 EP EP97100123A patent/EP0790387B1/de not_active Expired - Lifetime
- 1997-01-07 ES ES97100123T patent/ES2151194T3/es not_active Expired - Lifetime
- 1997-01-07 DK DK97100123T patent/DK0790387T3/da active
- 1997-01-07 PT PT97100123T patent/PT790387E/pt unknown
- 1997-01-07 AT AT97100123T patent/ATE194685T1/de active
-
2000
- 2000-10-05 GR GR20000402256T patent/GR3034567T3/el unknown
Also Published As
Publication number | Publication date |
---|---|
DE59701985D1 (de) | 2000-08-17 |
DE19601356A1 (de) | 1997-07-17 |
ES2151194T3 (es) | 2000-12-16 |
PT790387E (pt) | 2000-12-29 |
DK0790387T3 (da) | 2000-10-30 |
EP0790387A1 (de) | 1997-08-20 |
ATE194685T1 (de) | 2000-07-15 |
GR3034567T3 (en) | 2001-01-31 |
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