EP0778391B1 - Drehschlag-Wendelbohrer - Google Patents
Drehschlag-Wendelbohrer Download PDFInfo
- Publication number
- EP0778391B1 EP0778391B1 EP96810657A EP96810657A EP0778391B1 EP 0778391 B1 EP0778391 B1 EP 0778391B1 EP 96810657 A EP96810657 A EP 96810657A EP 96810657 A EP96810657 A EP 96810657A EP 0778391 B1 EP0778391 B1 EP 0778391B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cutting edges
- supplementary
- cutting
- drill
- shaft
- 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
- 238000005520 cutting process Methods 0.000 claims description 145
- 239000000463 material Substances 0.000 claims description 19
- 239000000428 dust Substances 0.000 claims description 14
- 230000002093 peripheral effect Effects 0.000 claims description 14
- 229910052751 metal Inorganic materials 0.000 claims description 8
- 239000002184 metal Substances 0.000 claims description 7
- 230000008719 thickening Effects 0.000 claims description 2
- 238000010410 dusting Methods 0.000 claims 2
- 238000000926 separation method Methods 0.000 claims 2
- 238000005553 drilling Methods 0.000 description 34
- 230000008901 benefit Effects 0.000 description 5
- 238000011144 upstream manufacturing Methods 0.000 description 5
- 230000001154 acute effect Effects 0.000 description 4
- 238000007726 management method Methods 0.000 description 4
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 description 4
- 238000000034 method Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000009527 percussion Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 239000011435 rock Substances 0.000 description 2
- 239000003082 abrasive agent Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910001092 metal group alloy Inorganic materials 0.000 description 1
- 238000005065 mining Methods 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 238000005476 soldering Methods 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
- E21B10/44—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
-
- 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 rotary impact twist drill according to the generic Preamble of claim 1.
- Rotary impact twist drills are drilling tools that are used in conjunction with axial impact assisted Rotary drilling rigs are used. In particular, it concerns in usually around rock or masonry drills that are used for the rotary impact creation of holes or breakthroughs in concrete or masonry can be used.
- a twist drill for drilling work in solid rock is known, the a drill shaft with two spirals running on the shaft for the Has drilling dust.
- Tungsten carbide cutting edges are provided at the shaft end Chisel and abrasively process the subsurface to create a drill hole.
- the Tungsten carbide blades are arranged in a cross shape in the end face of the shaft end protrude axially beyond the end face.
- the hard metal cutting edges on the one hand, on a continuous, over the diameter of the population extending hard metal plate, and provided on additional hard metal elements, the along a diameter of the shaft standing at 90 ° to the hard metal plate are arranged.
- Between the main cutting edges arranged on the hard metal plate and the additional cutting edges are each essentially axially parallel to the shaft extending grooves provided, which open into the Abfuhmuten on the shaft. These serve the removal of the resulting from the abrasive processing of the surface Drill dust.
- the main and additional cutting edges also have a radial projection opposite the jacket of the shank to prevent jamming of the drilling tool in the To prevent drilling. This well-known twist drill allows a moderate Drilling performance with reasonable wear of the carbide cutting edges.
- a rotary impact twist drill is known, one along of a diameter of the shank and arranged carbide pins formed additional cutting edges, each having an axial and a radial Have protrusion over the shaft. They are on the carbide insert Main cutting of the drilling tool provided. The additional cutting edges are opposite axially reset the main cutting edges and essentially only meet Management functions for the drilling tool.
- This improved rotary impact twist drill are the main and additional cutting edges in one that deviates from 90 ° Angle to each other.
- the arrangement is selected such that in relation to the direction of rotation of the drilling tool that leading the cutting insert Additional cutting edge with this includes an angle that is greater than 90 °, while the additional cutting edge following the insert with it an acute angle includes.
- This embodiment has the advantage that the area which the respective main cutting edge is upstream, expanded and the mouth of a widened main courage allowed. In the narrower area, to the trailing one Additional cutting edge, a narrow additional handling is provided. At this "X-like" arrangement of the insert and the secondary cutting edges is due to the Cutting plate upstream widened Kleinfahmuten an improved Drill dust removal and adequate guidance is ensured via the additional cutting edges.
- the prerequisite should be created to Cutting insert and the additional cutting edges with regard to their specific stress to be able to optimize.
- the central part of the Carbide cutting insert by the axial blows of the rotary impact drill others Is subjected to loads as the peripheral areas of the insert or the Additional cutting edges, which primarily cause shear forces.
- the object of the present invention is therefore a rotary impact twist drill to be modified in such a way that these different loads of Carbide cutting can be taken into account.
- the performance should of the drilling tool at least remain and a very good removal of the Bohrmehls be guaranteed.
- DE 4306981 A discloses a rotary impact twist drill with a drill shank that with at least one spiraling along its length Main discharge groove is equipped for drilling dust and at the shaft end with a cutting plate and is equipped with additional cutting edges that are substantially X-shaped to each other in the End face at the end of the drill shaft are arranged and fixed and the end face and protrude axially or radially from the casing of the drill shaft, the additional cutting edges project peripheral regions of the cutting plate axially and / or radially, with reference to the direction of rotation of the rotary impact twist drill the angle between the additional cutting edges and the trailing insert is smaller than 90 ° and each additional cutting edge is one Main discharge groove is upstream.
- a rotary impact twist drill which is the features stated in the characterizing section of claim 1.
- the additional cutting edges project beyond the peripheral areas of the Cutting plate axially and / or radially. Relative to the direction of rotation of the rotary impact twist drill is the angle between the additional cutting edges and the subsequent one Cutting plate less than 90 °.
- Each additional cutting edge is one of the main tasks upstream.
- the broad main delivery paths for the drilling dust are covered in front of the direction of rotation of the drilling tool, the additional cutting edges.
- the removed material is conveyed directly into the main discharge paths.
- the Arrangement of the insert and the additional cutting edges in the shape of an X, in which the additional cutting edges leading in relation to the direction of rotation of the drilling tool form an acute angle of less than 90 ° with the following insert, allows to broaden the main process. This way is an even better one Removal of drilling dust guaranteed.
- the cutting edges of the insert only fulfill Management function for the rotary impact twist drill and can with regard to their Task can be further optimized.
- additional removal paths are provided which are related to the direction of rotation of the Rotary impact twist drill are located downstream of the additional cutting edges.
- the Additional execution paths are in the narrowed area between the preceding ones Additional cutting and the insert arranged.
- the guiding function of the peripheral areas of the cutting plate is thereby further improved that the end faces of the Cutting plate are curved, their curvature of the curvature of the Jacket of the drill shaft is aligned. If the over the shaft coat protruding areas of the insert in contact with the borehole wall come, because of the curved shape of their end faces they only slide on the Along the borehole wall and make practically no contribution to the abrasive Material removal. This reduces the friction of the drilling tool in the borehole.
- the Center area preferably axially thickened. That way it becomes very high impact load on the center area of the insert, especially when Tapping into account.
- the cutting insert is divided into segments, which are connected to each other via thin material webs. That way, be on The insert creates predetermined breaking points that prevent the insert breaks uncontrollably if it is subjected to excessive mechanical stress.
- segmented design of the Insert material usually an expensive, special hard metal, can be saved can.
- the radial distance of the additional cutting edges from the raised central area of the segmented cutting insert is greater than the length of the material webs.
- a breakthrough drill Frictional resistance when drilling the hole The non-abrasive machined annular area of the subsurface has a very low stability and is simply through the leading insert or the face of the shaft crushed.
- the insert is made of an impact-resistant material.
- the Additional cutting edges which provide the main material removal, exist at this embodiment of the invention advantageously made of a harder material than that Cutting board. In this way, the cutting edges are different according to their Stress optimized.
- the additional cutting edges lie on one another Diameter opposite and are the same distance from the center of the end face arranged.
- Additional cutting edges are preferably load-bearing as edge-shaped cutting edges Tungsten carbide plate formed.
- the embodiment of a rotary impact twist drill shown in supervision in FIG. 1 comprises a shaft 1 with two main discharge grooves 4, 5 for drilling dust.
- the shaft 1 On its one shaft end 10, the shaft 1 is equipped with a cutting plate 6 which in a groove 9 extending over the diameter of the shaft 1, for example by soldering.
- the cutting plate 6 has an approximately roof-shaped design Tungsten carbide blades 7, which rise from a surface 3 above Knife tip 8 withdraw axially outwards to the jacket 2 of the shaft 1.
- additional cutting edges 11 are arranged in the end face, the longitudinal axis L includes an acute angle with the longitudinal extent of the cutting plate 6.
- two additional cutting edges 11 are diametrically opposed to each other arranged opposite, their longitudinal axes L with a diameter of Shank 1 collapse.
- the cutting plate 6 and the Additional cutting 11 essentially the shape of an X.
- the additional cutting edges 11 at the same distance from the center of the End face 3 arranged.
- the additional cutting edges 11 have one in relation to the jacket 2 of the shaft 1 radial projection r, which is greater than the radial projection s of the cutting plate 6.
- the radial projection of the insert is at least 50% of the radial one Overhang of the additional cutting edges.
- the additional cutting edges 11 Envelope circle H fixed, which is indicated by dashed lines in Fig. 1.
- each additional cutting edge 11 is one of the main discharge paths 4, 5 upstream.
- secondary removal grooves 14, 15 are arranged for drilling dust, which preferably open into the main discharge grooves 4, 5 along the shaft 1.
- the axially parallel end faces 13 are the Cutting plate 6 is curved.
- the curvature of the end faces 13 is the Curvature of the jacket 2 of the shaft 1 adjusted and preferably part of a Cylindrical surface.
- the axially parallel end faces 12 of the. Envelope circle H fixing additional cutting edges 11 are preferably designed as cutting edges 22 to increase their abrasive effect.
- FIGS. 4 and 5 show a further embodiment of an inventive Rotary percussion drill spiral. It comprises a shaft 1 with two main discharge grooves 4, 5 for drilling dust and is at its one shaft end 10 with a cutting plate 6 equipped, which is segmented.
- the cutting plate 6 in a central cutting edge 17 and divided into peripheral segments 18 which are narrow Material webs 19 are connected to one another, as shown in FIGS. 4 and 5.
- the central cutting edge 17 projects beyond the peripheral segments 18 and points in its Center area a cross-sectional thickening 20.
- Which is about the diameter of the shaft 1 extending groove 9 has a in the central region of the end face 3 Recess 16 on which to accommodate the thickened center region 20 of the Cutting plate 6 is formed. In this way, the cutting plate 6 is positively in the groove 9 fixed.
- the additional cutting edges 11 protrude beyond the peripheral segments 18 of the cutting insert both axially and radially.
- the distance of the additional cutting edges 11 from the raised one The area of the central cutting edge 17 is greater than the length of the thin material webs 19.
- the peripheral segments 18 only perform management functions for the Rotary percussion flute drill bit.
- the actual cutting performance is from the additional cutting edges 11 and to a smaller extent also taken over by the central cutting edge 17. Since the Cutting plate 6 and in particular the central cutting edge 17 in the example shown segmented variant of the insert primarily axial Axial impact on the tool, it is from Advantage to produce the cutting plate 6 from an impact-resistant material.
- the Additional blades 11, which perform the actual mining performance and high subject to abrasive forces are made of a harder material than that Cutting plate 6. In both cases, these are suitable hard metal alloys, which are known per se from the prior art.
- the end faces 23 parts of a cylindrical surface the curvature of the curvature of the Shell 2 of the shaft 1 largely corresponds.
- FIGS. 1 and 3 are views shown. 7 is a front view from the direction of the Use with the borehole wall engaging free end face 12 of the Additional cutting edge 11.
- the additional cutting edge 11 has approximately roof-shaped cutting edges 24 on. Its free end face 12 is also designed as a cutting edge 22 to make it abrasive To increase the effect in use.
- the foot part 25 of the additional cutting edge is for example, rounded and is even better in shape the bottom of the receiving groove 26 in the shaft 1 adjusted.
- the receiving grooves 26 for the additional cutting edges are, as shown in FIGS. 1 and 3, for example, as separate Grooves formed. In this way, the additional cutting edges 11 can be used independently from each other in their orientation to the cutting plate 6 are arranged. But it is also conceivable, the additional cutting edges 11 in a single, over the diameter of the Arrange shaft 1 extending receiving groove 26 and there for example by Fix in place.
- the additional cutting edges protrude the peripheral areas of the cutting plate axially or radially or both axially and radial.
- the additional cutting edges thus take over the function of main cutting edges and experience the greatest shear stress when drilling a hole. Since the actual material removal on the additional cutting edges are the broad ones Main procedure for drilling dust, related to the direction of rotation of the Drilling tool, the additional cutting edges. That way it will removed material is conveyed directly into the main discharge path.
- the arrangement of the Cutting insert and the additional cutting edges in the form of an X in which the covered additional cutting edges leading in the direction of rotation of the drilling tool with the subsequent cutting insert an acute angle less than 90 ° allowed it to spread the main business. This way an even better discharge of the drilling dust guaranteed.
- the cutting edges of the insert only fulfill Management function for the rotary impact twist drill and can with regard to their Task can be further optimized.
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)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
- Earth Drilling (AREA)
- Drilling Tools (AREA)
- Percussive Tools And Related Accessories (AREA)
Description
- Fig. 1
- eine Stimansicht eines ersten Ausführungsbeispiels eines Drehschlag-Wendelbohrers gemäss der Erfindung;
- Fig. 2
- eine Seitenansicht eines weiteren Ausführungsbeispiels eines Drehschlag-Wendelbohrers gemäss der Erfindung;
- Fig. 3
- eine Stimansicht des Ausführungsbeispiels gemäss Fig. 2;
- Fig. 4
- eine Seitenansicht einer segmentierten Schneidplatte;
- Fig. 5
- eine Aufsicht der Schneidplatte gemäss Fig. 4; und
- Fig. 6 und 7
- zwei Seitenansichten einer Zusatzschneide
Claims (9)
- Drehschlag-Wendelbohrer mit einem Bohrerschaft (1), der mit wenigstens einer, spiralförmig entlang seiner Längserstreckung verlaufenden Hauptabfuhmut (4, 5) für Bohrmehl ausgestattet ist und am Schaftende (10) mit einer Schneidplatte (6) und mit Zusatzschneiden (11) ausgestattet ist, die im wesentlichen X-förmig zueinander in der Stirnfläche (3) am Ende des Bohrerschaftes (1) angeordnet und fixiert sind und die Stirnfläche (3) und den Mantel (2) des Bohrerschaftes (1) axial bzw. radial überragen, wobei die Zusatzschneiden (11) die peripheren Bereiche der Schneidplatte (6) axial und/oder radial überragen, sowie, bezogen auf die Drehrichtung (R) des Drehschlag-Wendelbohrers, der Winkel zwischen den Zusatzschneiden (11) und der nacheilenden Schneidplatte (6) kleiner ist als 90° und jeder Zusatzschneide (11) eine Hauptabfuhmut (4, 5) vorgelagert ist, dadurch gekennzeichnet, dass Zusatzabfuhrnuten (14, 15) für Bohrmehl vorgesehen sind, die bezogen auf die Drehrichtung (R) des Drehschlag-Wendelbohrers den Zusatzschneiden (11) nachgelagert sind, sowie entlang des Schaftes(1)in die Hauptabfuhmuten(4, 5) münden.
- Vorrichtung nach Anspruch 1 dadurch gekennzeichnet, dass der radiale Überstand (s) der Schneidplatte (6) wenigstens 50% des radialen Überstands der Zusatzschneiden (r) beträgt.
- Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass die achsparallel zur Schaftachse verlaufenden Stirnflächen (13; 23) der Schneidplatte (6) gekrümmt ausgebildet sind, wobei ihre Krümmung der Krümmung des Mantels (2) des Bohrerschaftes (1) angeglichen ist.
- Vorrichtung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass der Zentrumsbereich der Schneidplatte (6) die peripheren Bereiche und die Zusatzschneiden (11) überragt und vorzugsweise eine axiale Verdickung (20) aufweist.
- Vorrichtung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass die Schneidplatte (6) in Segmente (17, 18) unterteilt ist, die über dünne Materialstege (19) miteinander verbunden sind.
- Vorrichtung nach Anspruch 4 und 5, dadurch gekennzeichnet, dass der radiale Abstand der Zusatzschneiden (11) vom erhabenen zentralen Bereich (17) der segmentierten Schneidplatte (6) grösser ist als die Länge der Materialstege (19).
- Vorrichtung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass die Schneidplatte (6) aus einem schlagzähen Material besteht und dass die Zusatzschneiden (11) aus einem härteren Material bestehen als die Schneidplatte (6).
- Vorrichtung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass die Zusatzschneiden (11) einander auf einem Durchmesser des Schaftes (1) gegenüberliegen und im gleichen Abstand vom Zentrum der Stirnfläche (3) angeordnet sind.
- Vorrichtung nach einem der vorangehenden Ansprüche, dadurch gekennzeichnet, dass die Zusatzschneiden (11) als dachkantförmige Schneiden (22, 24) tragende Hartmetallplättchen ausgebildet sind.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19545648A DE19545648A1 (de) | 1995-12-07 | 1995-12-07 | Drehschlag-Wendelbohrer |
DE19545648 | 1995-12-07 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0778391A2 EP0778391A2 (de) | 1997-06-11 |
EP0778391A3 EP0778391A3 (de) | 1998-07-01 |
EP0778391B1 true EP0778391B1 (de) | 2003-08-20 |
Family
ID=7779439
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96810657A Expired - Lifetime EP0778391B1 (de) | 1995-12-07 | 1996-10-02 | Drehschlag-Wendelbohrer |
Country Status (6)
Country | Link |
---|---|
US (1) | US5836410A (de) |
EP (1) | EP0778391B1 (de) |
JP (1) | JP3819500B2 (de) |
CN (1) | CN1075431C (de) |
DE (2) | DE19545648A1 (de) |
DK (1) | DK0778391T3 (de) |
Families Citing this family (30)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19703994B4 (de) * | 1997-02-03 | 2006-04-20 | Drebo Werkzeugfabrik Gmbh | Bohrer |
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 |
CN1081281C (zh) * | 1998-09-02 | 2002-03-20 | 王培林 | 钻头 |
DE19860528B4 (de) * | 1998-12-30 | 2006-12-07 | Robert Bosch Gmbh | Gesteinsbohrer für Hammerbohrmaschinen |
US6338390B1 (en) | 1999-01-12 | 2002-01-15 | Baker Hughes Incorporated | Method and apparatus for drilling a subterranean formation employing drill bit oscillation |
DE29901285U1 (de) * | 1999-01-26 | 1999-06-17 | Plica Werkzeugfabrik Ag | Bohrwerkzeug |
DE19916975A1 (de) * | 1999-04-15 | 2000-10-19 | Hilti Ag | Gesteinsbohrer |
DE19942986A1 (de) * | 1999-09-09 | 2001-03-15 | Hilti Ag | Bohrwerkzeug |
DE19942987A1 (de) * | 1999-09-09 | 2001-03-15 | Hilti Ag | Bohrwerkzeug |
DE19942985A1 (de) | 1999-09-09 | 2001-03-15 | Hilti Ag | Bohrwerkzeug |
DE19964272C2 (de) * | 1999-09-16 | 2003-05-28 | Heller Dinklage Gmbh Geb | Bohrer, insbesondere Gesteinsbohrer |
US6374931B1 (en) | 1999-11-03 | 2002-04-23 | Relton Corporation | Multiple cutter rotary hammer bit |
DE10006932A1 (de) * | 2000-02-16 | 2001-08-23 | Hilti Ag | Bohrwerkzeug für Gestein |
DE10006936A1 (de) * | 2000-02-16 | 2001-08-23 | Hilti Ag | Bohrwerkzeug für Gestein |
DE10009732A1 (de) * | 2000-03-02 | 2001-09-06 | Hawera Probst Gmbh | Gesteinsbohrer |
DE10053344A1 (de) * | 2000-10-27 | 2002-05-08 | Hilti Ag | Gesteinsbohrer |
EP1302290B1 (de) * | 2001-10-12 | 2008-07-02 | Robert Bosch Gmbh | Bohrwerkzeug |
LU90862B1 (de) * | 2001-12-17 | 2003-06-18 | Cerametal Sarl | Schlag-oder Hammerbohrer |
AU2003200561B9 (en) * | 2003-02-19 | 2009-07-02 | Sandvik Intellectual Property Ab | Drill bit |
GB2404889A (en) * | 2003-08-12 | 2005-02-16 | Black & Decker Inc | A cutting plate for a drill bit |
DE10351183A1 (de) | 2003-11-03 | 2005-06-02 | Illinois Tool Works Inc., Glenview | Gesteinsbohrer |
DE102006000201A1 (de) * | 2006-04-27 | 2007-10-31 | Hilti Ag | Hartstoffeinsatz |
CN103419284A (zh) * | 2012-05-21 | 2013-12-04 | 博世电动工具(中国)有限公司 | 钻头 |
EP2669033B1 (de) | 2012-05-29 | 2015-11-04 | Black & Decker Inc. | Schneidkopf für einen Bohrer. |
AT13738U1 (de) * | 2013-03-05 | 2014-07-15 | Dywidag Systems Int Gmbh | Bohrkrone |
CN104493263A (zh) * | 2014-09-28 | 2015-04-08 | 上海奥林汽车安全系统有限公司 | 一种高加工精度的双刃带麻花钻 |
US9981406B2 (en) * | 2015-06-25 | 2018-05-29 | Black & Decker Inc. | Drill bit |
DE102016000899A1 (de) | 2016-01-28 | 2017-08-03 | Universität Kassel | Schneidwerkzeug für die spanende Bearbeitung eines Werkstückes |
US10507534B2 (en) | 2016-03-17 | 2019-12-17 | O-Tags, Inc. | Systems, methods, and apparatus for reliably installing survey tags |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2099677A (en) * | 1936-03-19 | 1937-11-23 | John P Cunningham | Rock or earth drill bit |
US2529788A (en) * | 1948-07-06 | 1950-11-14 | Carl A Signell | Drill |
DE2414354A1 (de) * | 1974-03-26 | 1975-10-16 | Heller Geb | Gesteinsbohrer |
DE3707798A1 (de) * | 1987-03-11 | 1988-09-22 | Hawera Probst Kg Hartmetall | Gesteinsbohrer |
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 |
DE4306981A1 (de) * | 1993-03-05 | 1994-09-08 | Keil Werkzeugfabrik Karl Eisch | Bohrer für Gestein oder dergleichen |
DE4407119A1 (de) * | 1993-12-11 | 1995-06-14 | Hawera Probst Kg Hartmetall | Gesteinsbohrer |
-
1995
- 1995-12-07 DE DE19545648A patent/DE19545648A1/de not_active Ceased
-
1996
- 1996-10-02 EP EP96810657A patent/EP0778391B1/de not_active Expired - Lifetime
- 1996-10-02 DK DK96810657T patent/DK0778391T3/da active
- 1996-10-02 DE DE59610671T patent/DE59610671D1/de not_active Expired - Lifetime
- 1996-11-25 CN CN96121810A patent/CN1075431C/zh not_active Expired - Fee Related
- 1996-12-06 JP JP32697796A patent/JP3819500B2/ja not_active Expired - Fee Related
- 1996-12-09 US US08/762,173 patent/US5836410A/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
EP0778391A3 (de) | 1998-07-01 |
JPH09177465A (ja) | 1997-07-08 |
US5836410A (en) | 1998-11-17 |
DE59610671D1 (de) | 2003-09-25 |
CN1154900A (zh) | 1997-07-23 |
EP0778391A2 (de) | 1997-06-11 |
DE19545648A1 (de) | 1997-06-12 |
CN1075431C (zh) | 2001-11-28 |
JP3819500B2 (ja) | 2006-09-06 |
DK0778391T3 (da) | 2003-12-15 |
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