EP0824626B1 - Bohrwerkzeug - Google Patents
Bohrwerkzeug Download PDFInfo
- Publication number
- EP0824626B1 EP0824626B1 EP96914085A EP96914085A EP0824626B1 EP 0824626 B1 EP0824626 B1 EP 0824626B1 EP 96914085 A EP96914085 A EP 96914085A EP 96914085 A EP96914085 A EP 96914085A EP 0824626 B1 EP0824626 B1 EP 0824626B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cutting edge
- drilling tool
- tool according
- drilling
- main
- 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
Images
Classifications
-
- 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
- E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
- E21B10/58—Chisel-type inserts
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T408/00—Cutting by use of rotating axially moving tool
- Y10T408/89—Tool or Tool with support
- Y10T408/905—Having stepped cutting edges
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T408/00—Cutting by use of rotating axially moving tool
- Y10T408/89—Tool or Tool with support
- Y10T408/909—Having peripherally spaced cutting edges
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T408/00—Cutting by use of rotating axially moving tool
- Y10T408/89—Tool or Tool with support
- Y10T408/909—Having peripherally spaced cutting edges
- Y10T408/9095—Having peripherally spaced cutting edges with axially extending relief channel
- Y10T408/9097—Spiral channel
Definitions
- the present invention relates to a drilling tool with a Drilling head with an end face pointing in the feed direction, one main insert, one in the drill axis lying drill bit forms and on both sides essentially is inclined roof-shaped, at least two Additional blades that are essentially symmetrical under one Angles to the main cutting axis are arranged and their Cutting axes the main cutting axis in the drill axis of the Cut the drill head, and has drill flutes, the Main insert a primary cutting edge that overlaps radially extends at least one side of the main insert and has a secondary cutting edge that extends over in essentially the remaining length of the main insert extends radially and axially against the feed direction compared to the primary cutting edge by at least the drilling feed in Millimeters per revolution is reset.
- Drilling tools known from DE-PS 43 38 667 and DE-PS 35 00 202 have a main insert that overlaps the entire drill head determining the borehole diameter extends of the drilling tool and point and as a cutting element is axially symmetrical. Deliver such drilling tools unsatisfactory drilling progress and / or require a lot of effort. Furthermore, can a symmetrical cutting edge structure in use, even with transverse ones Vibrations cause a geometrically uneven Result in hole shape.
- the invention is therefore based on the object of a drilling tool of the type mentioned above, with which higher drilling progress and circular holes can be.
- this object is achieved in that the both sides of the Main insert have different lengths, whereby the long side over the circumferential contour of the base body protrudes, the primary cutting edge extends over at least the long one Side of the main insert and the secondary cutting edge itself over essentially the remaining length of the Main cutting insert extends radially and the radially outer Ends of the additional cutting edges on the same rotating circle as that radially outer end of the primary cutting edge and together the Determine nominal drilling diameter while the radially outer end the secondary cutting edge lies radially inward, as well as the Additional cutting on at least part of their cutting lengths Advance in the direction of drilling feed over the secondary cutting edge stand behind the primary cutting edge.
- the axial offset of the secondary cutting edge is advantageously increased the primary cutting edge depending on the material properties of the material to be drilled.
- the secondary cutting edge is advantageously approximately Set back 0.3 to 1.5 mm from the primary cutting edge.
- the length of the secondary cutting edge depending on the material properties of the material to be drilled is selected.
- the radially outer End of the short side of the main insert with secondary cutting edge does not protrude beyond the circumferential contour of the base body.
- the primary cutting edge overlaps 5/8 to 3/4 of the nominal drilling diameter extends.
- the angle between the respective additional cutting edge is and the main insert preferably 20 ° to 70 °.
- angle ( ⁇ ) between the respective additional cutting edge and the main insert selected depending on the volume of drilling dust is.
- additional drilling dust grooves are arranged behind the additional cutting edges.
- the cross section of the drilling dust grooves depending on the amount of machined Drilling dust per time is selected.
- the additional cutting edges include pins.
- the invention is based on the surprising finding that by the inventive design of the drilling tool at least four cutting edges, of which only three cutting edges determine the contour of the borehole, geometrically round boreholes be achieved because a circle is geometric through three points is not overdetermined.
- the insert is in the range of the selected shape higher peripheral speed or the longer distance several Cutting in use. This reduces cutting edge wear per cutting edge.
- Fig. 1 shows a top view of the end face of a drilling tool according to the present invention.
- a main cutting plate 12 is arranged, which forms a drill tip 14 lying in the drill axis and inclined essentially roof-shaped on both sides is trained.
- Symmetrical to the main cutting axis 16 on the main cutting plate 12 are two additional cutting edges 18 arranged at an angle a of 60 °, the Cutting axes the main cutting axis 16 in the drill axis of the drill head.
- Drill dust grooves 20 Between the main insert 12 and the additional cut 18 are Drill dust grooves 20.
- the main cutting tip 12 points from the drill tip 14 proceeding from a long side 22, which extends over the peripheral contour of the base body 10 protrudes, and a short side 24 on, which also over the circumferential contour of the base body protrudes, but in relation to the central axis of the tool is shorter than the long side 22.
- the main insert 12 has a primary cutting edge 26 which overlaps 5/8 of the nominal drilling diameter, i.e. over the long side 22 and contiguous over part of the short side 24 extends, and a secondary cutting edge 28, which extends over the remaining length of the short side 24 extends.
- the main cutting insert according to the invention which basically takes over the main guiding work and the essential part of the chiseling effect, has a significantly higher rock removal ratio due to the shortening of the effective cutting length (with the same drilling diameter) compared to a drilling tool according to the prior art, whereby the drilling tool works much faster.
- the radially outer ends of the additional cutters 18 lie on the same rotation circle with a diameter D 1 , which corresponds to the nominal drilling diameter of the drilling tool, as the radially outer end of the primary cutting edge 26.
- FIG 2 shows an edge region of the drilling tool of Figure 1 in detail.
- This edge area comprises part of the short side 24 of the main insert 12 and one of the two additional cutting edges 18.
- the primary cutting edge 26 extends over the long side 22 and part of the short Page 24 for a total of 5/8 of the nominal drilling diameter D1.
- the additional cutting edges 18 comprise cutting plates, the cutting edges 19 of which The embodiment shown here is essentially parallel to the cutting edges of the primary cutting edge 26 and the secondary cutting edge 28 are aligned, but in the direction of drilling feed V protrude beyond the secondary cutting edge 28 and behind the primary cutting edge 26 stand back.
- the cutting edge such as pins with a cone or truncated cone and the same, the course of the cutting edge between the Primary cutting edge 26 and the secondary cutting edge 28 lie.
- Such a cutter with four or more cutting edges delivers circular drill holes as compared to a conventional one Vierschneider only three points, namely the radial outer ends of the primary cutting edge 26 and the additional cutting edges 18, used to make a circular borehole deliver.
- the preferably suitable values from 0.3 to 1.5 mm for the resetting of the secondary cutting edge 28 compared to the Primary cutting edge 26 result from the specific rock of the current drilling progress.
Description
- Fig. 1
- eine Aufsicht auf die Stirnflächen eines Bohrwerkzeuges gemäß der vorliegenden Erfindung; und
- Fig. 2
- einen Randbereich des Bohrwerkzeuges von Fig. 1 im Detail.
Claims (15)
- Bohrwerkzeug mit einem Bohrkopf mit einer in Vorschubrichtung weisenden Stirnseite, die eine Hauptschneidplatte, die eine in der Bohrerachse liegende Bohrerspitze bildet und zu beiden Seiten im wesentlichen dachförmig geneigt ausgebildet ist, mindestens zwei Zusatzschneiden, die im wesentlichen symmetrisch unter einem Winkel zu der Hauptschneidachse angeordnet sind und deren Schneidachsen die Hauptschneidachse in der Bohrerachse des Bohrkopfes schneiden, und Bohrmehlnuten aufweist, wobei die Hauptschneidplatte (12) eine Primärschneide (26), die sich über mindestens eine Seite (22) der Hauptschneidplatte (12) radial erstreckt und eine Sekundärschneide (28) aufweist, die sich über im wesentlichen die verbleibende Länge der Hauptschneidplatte (12) radial erstreckt und entgegen der Vorschubrichtung axial gegenüber der Primärschneide (26) um mindestens den Bohrvorschub in Millimeter pro Umdrehung zurückgesetzt ist, dadurch gekennzeichnet, daß die beiden von der Bohrerspitze (14) ausgehenden Seiten (22, 24) der Hauptschneidplatte (12) unterschiedliche Längen aufweisen, wobei die lange Seite (22) über die Umfangskontur des Grundkörpers (10) hinausragt, die Primärschneide (26) sich über mindestens die lange Seite (22) der Hauptschneidplatte (12) und die Sekundärschneide (28) sich über im wesentlichen die verbleibende Länge der Hauptschneidplatte (12) radial erstreckt und die radial äußeren Enden der Zusatzschneiden auf demselben Rotationskreis wie das radial äußere Ende der Primärschneide (26) liegen und gemeinsam den Nennbohrdurchmesser bestimmen, während das radial äußere Ende der Sekundärschneide (28) radial nach innen zurückliegt, sowie die Zusatzschneiden (18) zumindest auf einem Teil ihrer Schneidlängen in Bohrvorschubrichtung über die Sekundärschneide (28) vor- und hinter der Primärschneide (26) zurückstehen.
- Bohrwerkzeug nach Anspruch 1, dadurch gekennzeichnet, daß der axiale Versatz der Sekundärschneide (28) zu der Primärschneide (26) in Abhängigkeit von den Werkstoffeigenschaften des zu bohrenden Materials gewählt ist.
- Bohrwerkzeug nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Sekundärschneide (28) um näherungsweise 0,3 bis 1,5 mm gegenüber der Primärschneide (26) zurückgesetzt ist.
- Bohrwerkzeug nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß die Länge der Sekundärschneide (28) in Abhängigkeit von den Werkstoffeigenschaften des zu bohrenden Materials gewalt ist.
- Bohrwerkzeug nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß das radial äußere Ende der kurzen Seite (24) der Hauptschneidplatte (12) mit Sekundärschneide (28) über die Umfangskontur des Grundkörpers hinausragt.
- Bohrwerkzeug nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß das radial äußere Ende der kurzen Seite (24) der Hauptschneidplatte (12) mit Sekundärschneide (28) über die Umfangskontur des Grundkörpers (10) nicht hinausragt.
- Bohrwerkzeug nach Anspruch 6, dadurch gekennzeichnet, daß das radial äußere Ende der kurzen Seite (24) der Hauptschneidplatte (12) mit Sekundärschneide (28) von der Umfangskontur des Grundkörpers (10) radial nach innen eingezogen ist.
- Bohrwerkzeug nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß die Primärschneide (26) sich über 5/8 bis 3/4 des Nennbohrdurchmessers erstreckt.
- Bohrwerkzeug nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, daß der Winkel (α) zwischen der jeweiligen Zusatzschneide (18) und der Hauptschneide (12) vorzugsweise 20° bis 70° beträgt.
- Bohrwerkzeug nach einem vorangehenden Ansprüche, dadurch gekennzeichnet, daß der Winkel (α) zwischen der jeweiligen Zusatzschneide (18) und der Hauptschneidplatte (12) in Abhängigkeit von dem anfallenden Bohrmehlvolumen gewählt ist.
- Bohrwerkzeug nach einem vorangehenden Ansprüche, dadurch gekennzeichnet, daß in Drehrichtung vor den Zusatzschneiden (18) Bohrmehlnuten (20) angeordnet sind.
- Bohrwerkzeug nach Anspruch 11, dadurch gekennzeichnet, daß zusätzliche Bohrmehlnuten (20) hinter den Zusatzschneiden (18) angeordnet sind.
- Bohrwerkzeug nach einem vorangehenden Ansprüche, dadurch gekennzeichnet, daß der Querschnitt der Bohrmehlnuten (20) in Abhängigkeit von der anfallenden Menge an zerspantem Bohrmehl pro Zeit gewählt ist.
- Bohrwerkzeug nach einem vorangehenden Ansprüche, dadurch gekennzeichnet, daß die Zusatzschneiden (18) Stifte oder dergleichen umfassen.
- Bohrwerkzeug nach einem vorangehenden Ansprüche, dadurch gekennzeichnet, daß das Bohrwerkzeug eine Förderwendel aufweist.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19516270A DE19516270C1 (de) | 1995-05-09 | 1995-05-09 | Bohrwerkzeug |
DE19516270 | 1995-05-09 | ||
PCT/DE1996/000868 WO1996035856A1 (de) | 1995-05-09 | 1996-05-08 | Bohrwerkzeug |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0824626A1 EP0824626A1 (de) | 1998-02-25 |
EP0824626B1 true EP0824626B1 (de) | 2000-01-12 |
Family
ID=7761000
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96914085A Expired - Lifetime EP0824626B1 (de) | 1995-05-09 | 1996-05-08 | Bohrwerkzeug |
Country Status (6)
Country | Link |
---|---|
US (1) | US6032750A (de) |
EP (1) | EP0824626B1 (de) |
AT (1) | ATE188760T1 (de) |
DE (2) | DE19516270C1 (de) |
DK (1) | DK0824626T3 (de) |
WO (1) | WO1996035856A1 (de) |
Families Citing this family (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19807394A1 (de) * | 1998-02-21 | 1999-08-26 | Hilti Ag | Bohr- und/oder Meisselwerkzeug |
DE19811887A1 (de) * | 1998-03-18 | 1999-09-23 | Plica Werkzeugfabrik Ag Mollis | Hammerbohrwerkzeug |
DE19827536A1 (de) | 1998-06-20 | 1999-12-23 | Hilti Ag | Bohrwerkzeug |
DE29901296U1 (de) | 1999-01-26 | 1999-06-10 | Plica Werkzeugfabrik Ag | Bohrwerkzeug |
DE19942986A1 (de) * | 1999-09-09 | 2001-03-15 | Hilti Ag | Bohrwerkzeug |
DE10024433A1 (de) | 2000-05-19 | 2001-11-29 | Hawera Probst Gmbh | Gesteinsbohrer |
US7028790B2 (en) * | 2003-09-19 | 2006-04-18 | Jack Moore Associates, Inc. | Rotary drill bit |
DE10351183A1 (de) * | 2003-11-03 | 2005-06-02 | Illinois Tool Works Inc., Glenview | Gesteinsbohrer |
DE102008054869B4 (de) * | 2008-12-18 | 2010-09-02 | Hilti Aktiengesellschaft | Bohrkopf für Gesteinsbohrer |
CN106907112B (zh) * | 2017-05-05 | 2023-06-20 | 宜昌神达科技有限公司 | 一种钻井用pdc钻头 |
Family Cites Families (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2567084A (en) * | 1947-05-23 | 1951-09-04 | Termite Drills Inc | Bit |
US2673714A (en) * | 1950-08-05 | 1954-03-30 | John M Hargrave | Rock or masonry drill |
GB961449A (en) * | 1962-03-19 | 1964-06-24 | Ass Elect Ind | Improvements relating to drills |
DE2348874A1 (de) * | 1973-09-28 | 1975-04-10 | Heinrich B Schaefers | Gesteinsbohrer mit hartmetallbestueckung und auswechselbarem bohrkopf, sowie auswechselbarer spirale |
DE2912394A1 (de) * | 1979-03-29 | 1980-10-09 | Guergen Karl Heinz | Gesteinsbohrwerkzeug fuer gesteinsbohr-, drehschlagbohr- und bohrhammermaschinen |
DE2952296A1 (de) * | 1979-12-24 | 1981-06-25 | Karlheinz 2110 Buchholz Guergen | Gesteinsbohrwerkzeug fuer gesteinsbohrmaschinen |
DE8337306U1 (de) * | 1983-12-24 | 1984-04-05 | Zitterbart, Heinz, 3436 Hessisch Lichtenau | Spiralbohrer fuer eine handbohrmaschine, insbesondere zum bohren von stein, marmor, kunststein od.dgl. |
US4727946A (en) * | 1984-10-26 | 1988-03-01 | Nl Industries, Inc. | Rotary drill bits |
DE3707798A1 (de) * | 1987-03-11 | 1988-09-22 | Hawera Probst Kg Hartmetall | Gesteinsbohrer |
US4787464A (en) * | 1987-11-13 | 1988-11-29 | Gte Products Corporation | Variable rake mine tool insert and method of use |
DE3742661A1 (de) * | 1987-12-16 | 1989-07-13 | Hawera Probst Kg Hartmetall | Gesteinsbohrer |
DE3820695C2 (de) * | 1988-06-18 | 1996-07-25 | Hawera Probst Kg Hartmetall | Gesteinsbohrer |
DE3834675A1 (de) * | 1988-10-12 | 1990-04-19 | Hawera Probst Kg Hartmetall | Bohrwerkzeug |
DE3919264C2 (de) * | 1989-06-13 | 1997-01-23 | Duss Maschf | Drehschlagbohrer für ein von Hand führbares Bohrgerät |
JPH04201106A (ja) * | 1990-11-30 | 1992-07-22 | Masao Kubota | ドリル |
DE4303590C5 (de) * | 1993-02-08 | 2007-11-22 | Drebo Werkzeugfabrik Gmbh | Gesteinsbohrer |
DE4306981A1 (de) * | 1993-03-05 | 1994-09-08 | Keil Werkzeugfabrik Karl Eisch | Bohrer für Gestein oder dergleichen |
-
1995
- 1995-05-09 DE DE19516270A patent/DE19516270C1/de not_active Expired - Fee Related
-
1996
- 1996-05-08 WO PCT/DE1996/000868 patent/WO1996035856A1/de active IP Right Grant
- 1996-05-08 DK DK96914085T patent/DK0824626T3/da active
- 1996-05-08 DE DE59604177T patent/DE59604177D1/de not_active Expired - Lifetime
- 1996-05-08 AT AT96914085T patent/ATE188760T1/de not_active IP Right Cessation
- 1996-05-08 EP EP96914085A patent/EP0824626B1/de not_active Expired - Lifetime
- 1996-05-08 US US08/945,677 patent/US6032750A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
DK0824626T3 (da) | 2000-05-29 |
EP0824626A1 (de) | 1998-02-25 |
ATE188760T1 (de) | 2000-01-15 |
DE59604177D1 (de) | 2000-02-17 |
US6032750A (en) | 2000-03-07 |
WO1996035856A1 (de) | 1996-11-14 |
DE19516270C1 (de) | 1997-01-30 |
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