EP0607958B1 - Gesteinsbohrer - Google Patents
Gesteinsbohrer Download PDFInfo
- Publication number
- EP0607958B1 EP0607958B1 EP94100784A EP94100784A EP0607958B1 EP 0607958 B1 EP0607958 B1 EP 0607958B1 EP 94100784 A EP94100784 A EP 94100784A EP 94100784 A EP94100784 A EP 94100784A EP 0607958 B1 EP0607958 B1 EP 0607958B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cutting tip
- drill
- minor
- rock drill
- major cutting
- 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
- 239000011435 rock Substances 0.000 title claims abstract description 34
- 238000005553 drilling Methods 0.000 claims description 17
- 239000002184 metal Substances 0.000 claims description 7
- 239000000428 dust Substances 0.000 claims description 4
- 238000010276 construction Methods 0.000 claims description 2
- 230000000694 effects Effects 0.000 description 11
- 230000002349 favourable effect Effects 0.000 description 3
- 230000006378 damage Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000004575 stone Substances 0.000 description 2
- WNEODWDFDXWOLU-QHCPKHFHSA-N 3-[3-(hydroxymethyl)-4-[1-methyl-5-[[5-[(2s)-2-methyl-4-(oxetan-3-yl)piperazin-1-yl]pyridin-2-yl]amino]-6-oxopyridin-3-yl]pyridin-2-yl]-7,7-dimethyl-1,2,6,8-tetrahydrocyclopenta[3,4]pyrrolo[3,5-b]pyrazin-4-one Chemical compound C([C@@H](N(CC1)C=2C=NC(NC=3C(N(C)C=C(C=3)C=3C(=C(N4C(C5=CC=6CC(C)(C)CC=6N5CC4)=O)N=CC=3)CO)=O)=CC=2)C)N1C1COC1 WNEODWDFDXWOLU-QHCPKHFHSA-N 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000009527 percussion Methods 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.
- Such rock drills are usually as percussion or Hammer drill trained.
- the drill head has a cross extending hard metal plate on by the striking movement to serve the rock destruction. This happens through a chisel effect of the rock drill, which is a striking movement executes, then withdraws during the rotation and after rotation by a given angle the next one Strikes. In this way, for example 4, 6 or 8 strokes per rotation realized will.
- a generic rock drill is from GB-A-530 113 known. With such a drill, the shattering effect is said due to different arrangements of secondary cutting inserts be improved.
- the invention is based on the object To create rock drill according to the preamble of claim 1, which is also suitable for problematic rock, especially brittle and hard rock and such with hard stone inclusions shows a reasonable drilling progress without the wear effect increase due to an excessive axial load.
- a star-shaped pattern of impact points or grooves in the drilling base which the Drill progress inhibits.
- a standard drill can be used in which the rotary movement a certain Number of strokes is assigned. So far the bridges remained between the grooves on the bottom of the drill, as they are from the The main cutting edge could not be taken is the one according to the invention.
- Auxiliary cutting edge is provided for these webs to hit and destroy so the main insert next opportunity to achieve further advance. This prevents the webs on the end face of the drill be touched on the side of the main cutting edge and - since the drill face only one with the available force can achieve low surface pressure - ultimately not eliminated can be.
- the cutting insert extends offset against the Main insert, so that it approximates when rotating hits the webs at right angles and smashes them.
- the secondary cutting insert does not extend radially, but rather parallel to the main insert and off-center, related to the drill axis.
- the concentricity of the drill not be affected by the secondary cutting insert what should be achieved, for example, that one provided in the area of the secondary cutting insert Bohrmehlab Kunststoffnut is milled a little deeper so that the Mass distribution is evened out.
- 2 are opposite one another Auxiliary inserts provided on different Radii are arranged so that the second minor cutting edge plate smashed another radial area of the web.
- the arrangement of the secondary cutting inserts is chosen that they meet the webs.
- the main effect of the Sub-insert therefore preferably at an angle of 30, 90 or 150 ° related to the main insert, while a Smashing effect in the range of 60 and 120 ° cannot be achieved is, because at these positions the main insert at the next or the next but one striking event occurs and thus there is a basic drill groove.
- a secondary insert or of secondary inserts if the cutting edge of the secondary cutting insert in that of the main cutting insert spanned tapered or tapered surface lies.
- the tip of the secondary cutting tip can be attached to the Reach the conical surface or end beforehand. Important is also that it protrudes clearly from the drill face, so that they have the desired disintegration effect for the Drill bases can exercise.
- the secondary cutting insert has a roof-shaped structure. Especially one can be advantageous for a drill with a smaller one Diameter provided, in large quantities as standard manufactured main cutting insert also as secondary cutting insert for the rock drill according to the invention in one embodiment use.
- the secondary cutting insert then a roof-shaped one also viewed in the transverse direction Construction. The tip thus formed is particularly favorable for the Bridge smashing.
- a rock drill 10 according to the invention has a drill head 12, whose end face 14 can be seen in Fig. 1.
- a hard metal plate 16 extends over the end face, which forms the main cutting plate and a main cutting edge 18 having.
- secondary cutting inserts 20 and 22 Extend parallel to the main insert 16 in the embodiment shown in Fig. 1 secondary cutting inserts 20 and 22 that are in the plane of the drawing offset right and left opposite the main cutting plate 16 are arranged.
- the secondary cutting inserts 20 and 22 extend substantially parallel to the main insert 16.
- the distance between the secondary cutting insert 20 and the main cutting insert 16 is less than the distance between the Sub-insert 22 and the main insert 16. Accordingly the secondary cutting plate 22 acts against one another the effective range of the secondary cutting plate 20 radially further outer circle and serves to destroy the bridge in the outdoor area the bottom of the drill, as shown in Fig. 5.
- the main insert 16 extends over the diameter of the drill head 12 radially outwards. Are opposite the secondary cutting plates 20 and 22 much shorter and in the example case extend over a quarter of the Length of the main insert 16.
- the main cutting plate protrudes 16 the secondary cutting plate 20 both in height and also on the side. This applies equally to the secondary cutting insert 22.
- the secondary cutting plates 20 and 22 can have cutting edges, formed in the manner known for main inserts are.
- a rock drill according to the invention inexpensive through the use of hard metal plates that per se for drill heads with a correspondingly smaller diameter are intended to be realized as secondary cutting inserts.
- a rock drill with a nominal size of 24 mm, with a main insert that is cut by a 24 mm long hard metal plate 16 is formed for the secondary cutting inserts 20 and 22 a hard metal plate for an 8 mm rock drill be used.
- the secondary cutting inserts 20 Roof-shaped when viewed in both the longitudinal and transverse directions. It goes without saying that other configurations in Come into consideration.
- the secondary cutting insert 20 lies within a conical surface 28, which is spanned by the rotating main cutting edge 18.
- the tip angle of the main cutting edge 18 can for example 130 °, the dimensions in a wide range to the Requirements are customizable.
- the removal of the minor cutting edge 30 of the minor cutting insert 20 of the conical surface 28 can be tailored to the requirements to adjust; if the minor cutting edge retracts further the clearing effect for the webs to be broken between the Borehole grooves correspondingly less, while loading the Minor cutting edge 30 is greatest when the minor cutting edge 30 lies exactly in the conical lateral surface 28.
- the drilling base 40 is shown in a schematic form.
- Such a drilling base 40 is made by an impact drill with 6-pitch, with 6 basic grooves 42 at regular angular intervals, i.e. around 60 ° spaced from each other, extends in the bottom 40. Between the basic grooves remain with conventional rock drills not cleared webs 44, which are somewhat wedge-shaped are after the distance between adjacent drill grooves is largest on the outer circumference of the drilling base 40, while the basic drilling grooves 42 are located in the area of the drill axis 32 to meet.
- FIGS. 1 to 3 can also be combine with an embodiment in which the secondary cutting insert asymmetrically obliquely to the main insert extends, preferably at an angle of about 34 °. With this configuration, a particularly wide range is obtained Clearance effect.
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)
- Earth Drilling (AREA)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
- Steroid Compounds (AREA)
- Drilling And Exploitation, And Mining Machines And Methods (AREA)
Description
- Fig. 1
- eine Ausgestaltung eines erfindungsgemäßen Gesteinsbohrer, in einer Ansicht von vorne;
- Fig. 2
- die Ausgestaltung gemäß Fig. 1, in einer Ansicht von der Seite;
- Fig. 3
- eine schematisierte Ansicht entsprechend Fig. 2, jedoch aus einem anderen Winkel; und
- Fig. 4
- eine schematisierte Darstellung eines Bohrgrundes.
Claims (10)
- Gesteinsbohrer mit einem Bohrkopf, der eine im wesentlichen dachförmige Hartmetallplatte aufnimmt, die sich quer über den Bohrer erstreckt, wobei die Hartmetallplatte mindestens an ihren dachförmigen Seiten eine Hauptschneide des Bohrkopfs aufweist und eine Hauptschneideplatte bildet und zusätzlich eine Nebenschneidplatte im Bohrkopf angebracht ist und wobei die Nebenschneidplatte (20, 22) sich im wesentlichen parallel zur Hauptschneidplatte erstreckt und vom Mittelpunkt des Bohrkopfes (12) beabstandet und gegen die Hauptschneidplatte (16) versetzt angeordnet ist, dadurch gekennzeichnet, daß mindestens zwei Nebenschneidplatten (20, 22) vorgesehen sind, die auf unterschiedlichen Radien des Bohrkopfes (12) angebracht sind.
- Gesteinsbohrer nach Anspruch 1, dadurch gekennzeichnet, daß die Nebenschneidplatte (20, 22) eine Schneide (30) aufweist, die in ihrer gesamten Länge innerhalb bzw. auf einer von der Hauptschneide (18) der Hauptschneidplatte (16) bei der Drehung des Bohrers (10) aufgespannten Kegelfläche (28) liegt.
- Gesteinsbohrer nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Nebenschneidplatte (20, 22) an einer Stelle an der Hauptschneidplatte (16) anliegt und sich schräg von dieser weg erstreckt.
- Gesteinsbohrer nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Winkel der Nebenschneidplatte (20) zur Hauptschneidplatte (16) 0° bis 45°, insbesondere 10° bis 40° und vorzugsweise 30° bis 35° beträgt.
- Gesteinsbohrer nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Nebenschneidplatte (20) sich von der Hauptschneidplatte (16) bis zum Außenradius des Bohrkopfes (12) erstreckt.
- Gesteinsbohrer nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Nebenschneidplatte (20) sich im Querschnitt dachförmig erstreckt und an ihrer der Hauptschneidplatte (16) benachbarten Stirnfläche in einem Winkel von 0° bis 20° bezogen auf die Bohrerachse (32) abgeschnitten ist.
- Gesteinsbohrer nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß Bohrmehlabfuhrnuten (24, 26) an dem Bohrkopf (12) an einer Stelle münden, die der Stelle, an welcher die Nebenschneidplatte (20) auf die Hauptschneidplatte (16) trifft, benachbart ist.
- Gesteinsbohrer nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Nebenschneidplatte (20, 22) in ihrer Längsrichtung betrachtet einen dachförmigen Aufbau aufweist.
- Gesteinsbohrer nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß mindestens eine Nebenschneidplatte (20, 22) am Außenumfang des Bohrkopfes (12) eine Kegelfläche (28), die von Schneiden (18) der Hauptschneidplatte (16) aufgespannt ist, in einer zur Bohrerachse parallelen Richtung überragt.
- Gesteinsbohrer nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Hauptschneidplatte (16) und/oder die Nebenschneidplatte (20, 22) sich über den Außenradius des Bohrkopfes (12) hinaus erstreckt und insbesondere die Hauptschneidplatte (16) sich radial weiter als die Nebenschneidplatte (20, 22) nach außen erstreckt.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4301708 | 1993-01-22 | ||
DE4301708A DE4301708C2 (de) | 1993-01-22 | 1993-01-22 | Gesteinsbohrer |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0607958A1 EP0607958A1 (de) | 1994-07-27 |
EP0607958B1 true EP0607958B1 (de) | 1998-08-19 |
Family
ID=6478737
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP94100784A Expired - Lifetime EP0607958B1 (de) | 1993-01-22 | 1994-01-20 | Gesteinsbohrer |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0607958B1 (de) |
AT (1) | ATE169987T1 (de) |
DE (2) | DE4301708C2 (de) |
DK (1) | DK0607958T3 (de) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19653155C1 (de) * | 1996-12-19 | 1998-07-09 | Drebo Werkzeugfab Gmbh | Gesteinsbohrer |
DE19724373A1 (de) * | 1997-06-10 | 1998-12-17 | Hilti Ag | Gesteinsbohrer |
DE19860528B4 (de) * | 1998-12-30 | 2006-12-07 | Robert Bosch Gmbh | Gesteinsbohrer für Hammerbohrmaschinen |
DE19916975A1 (de) | 1999-04-15 | 2000-10-19 | Hilti Ag | Gesteinsbohrer |
DE19942987A1 (de) | 1999-09-09 | 2001-03-15 | Hilti Ag | Bohrwerkzeug |
EP1431511B1 (de) * | 2002-12-19 | 2006-08-30 | Robert Bosch Gmbh | Gesteinsbohrer |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE757076C (de) * | 1936-11-18 | 1951-05-15 | Erhard Dipl-Ing Bertl | Gesteinsschlagbohrer mit radialen und exzentrisch gerichteten Hartmetallschneiden |
GB530113A (en) * | 1939-05-30 | 1940-12-05 | Erhard Bertl | Improvements relating to percussive drilling bits |
CH272188A (de) * | 1948-01-14 | 1950-12-15 | Sandvikens Jernverks Ab | Stossbohrkrone mit mindestens zwei Hartmetallschneideinsätzen. |
FR986125A (fr) * | 1948-05-13 | 1951-07-27 | Boehler & Co Ag Geb | Trépan à outils de taille en métal dur rapportés |
DE918741C (de) * | 1949-09-03 | 1954-10-04 | Boehler & Co Ag Geb | Gesteinsbohrer mit Einfach- oder Mehrfachschneiden |
DE3820695C2 (de) * | 1988-06-18 | 1996-07-25 | Hawera Probst Kg Hartmetall | Gesteinsbohrer |
-
1993
- 1993-01-22 DE DE4301708A patent/DE4301708C2/de not_active Expired - Fee Related
-
1994
- 1994-01-20 EP EP94100784A patent/EP0607958B1/de not_active Expired - Lifetime
- 1994-01-20 AT AT94100784T patent/ATE169987T1/de active
- 1994-01-20 DK DK94100784T patent/DK0607958T3/da active
- 1994-01-20 DE DE59406700T patent/DE59406700D1/de not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
DE4301708A1 (de) | 1994-07-28 |
DK0607958T3 (da) | 1998-10-26 |
DE59406700D1 (de) | 1998-09-24 |
ATE169987T1 (de) | 1998-09-15 |
DE4301708C2 (de) | 2002-10-31 |
EP0607958A1 (de) | 1994-07-27 |
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