EP0595214B1 - Gesteinsbohrer - Google Patents
Gesteinsbohrer Download PDFInfo
- Publication number
- EP0595214B1 EP0595214B1 EP93117125A EP93117125A EP0595214B1 EP 0595214 B1 EP0595214 B1 EP 0595214B1 EP 93117125 A EP93117125 A EP 93117125A EP 93117125 A EP93117125 A EP 93117125A EP 0595214 B1 EP0595214 B1 EP 0595214B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- drill
- drilling tool
- tool according
- shank
- drill 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
- 239000011435 rock Substances 0.000 title claims description 10
- 238000005520 cutting process Methods 0.000 claims description 80
- 238000005553 drilling Methods 0.000 claims description 76
- 230000007704 transition Effects 0.000 claims description 12
- 238000010276 construction Methods 0.000 claims description 6
- 230000004323 axial length Effects 0.000 claims description 3
- 238000013459 approach Methods 0.000 claims 1
- 230000002093 peripheral effect Effects 0.000 claims 1
- 239000000463 material Substances 0.000 description 12
- 230000008901 benefit Effects 0.000 description 6
- 238000013461 design Methods 0.000 description 6
- 239000000428 dust Substances 0.000 description 6
- 206010011416 Croup infectious Diseases 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000015572 biosynthetic process Effects 0.000 description 3
- 238000005755 formation reaction Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 229910052751 metal Inorganic materials 0.000 description 3
- 239000002184 metal Substances 0.000 description 3
- 230000002411 adverse Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000035939 shock Effects 0.000 description 2
- 238000012549 training Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010924 continuous production Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
- UONOETXJSWQNOL-UHFFFAOYSA-N tungsten carbide Chemical compound [W+]#[C-] UONOETXJSWQNOL-UHFFFAOYSA-N 0.000 description 1
- 238000004804 winding 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
- E21B10/56—Button-type inserts
-
- 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
- E21B17/00—Drilling rods or pipes; Flexible drill strings; Kellies; Drill collars; Sucker rods; Cables; Casings; Tubings
-
- 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
- Y10T408/906—Axially spaced
- Y10T408/9065—Axially spaced with central lead
-
- 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
Definitions
- the invention relates to a rock drill according to the Preamble of claim 1.
- the known drilling tools especially for manufacturing of breakthroughs in concrete or masonry, which are also called Breakthrough drills are called, the principle lies based on the fact that the rock material by the impact a heavy rotary hammer is smashed, the Tungsten carbide cutting similar to a pointed chisel Cause explosive effects in the brittle material. If only the radially outer, axially protruding edge region of the Drilling tool according to DE-27 56 990 C2 (Krupp) or the DE-28 56 205 A1 (HILTI) acts, the stone material Pot-shaped removed, with the radially inner area also breaks away due to the brittleness of the material.
- the axially protruding wall areas lead to a increased pointed chisel effect and thus to an increased Removal.
- the axially recessed, inner area of the Cutting blade is also in the known drilling tools studded with hard metal pins. However, these do not serve in primarily for material removal, but for shredding of the material that has already broken away.
- a cup-shaped design of the drill bit with axial protruding edges has the advantage of an increased Surface pressure and thus an increased drilling capacity, because the axially recessed recesses not or only make an insignificant contribution to the removal of the rock.
- the fact that the axially protruding Drillings removed and partially crushed comes to rest on the face of the cutting wing before it by the provided between the cutting blades Discharge openings in the Bohrmehlnuten or in the Funding spiral is discharged. This can result in the Drilling tools in these largely flat end faces Areas of the cutting blades quasi on a drilling dust pad sits, which leads to a certain damping of the impact and thus leads to a reduction in drilling progress. This is especially true for a larger face set back area, as mentioned in the introduction Literature is shown.
- the known tools usually have a drill head to which no one is connected in one piece Conveying spiral connects. Rather, according to the Representation in EP 0 347 601 A1 (Hawera) additional attachable to the smooth drill shaft Conveying coils used for the transport of drilling dust. This additional conveying spirals, in particular made of plastic are subject to increased wear and can in particular do not contribute to the solidification of the drilling tool as a whole.
- a drilling tool has become known from the Westa company, whose drill head has four cross-shaped, radial has cutting blades that run with hard metal plates are occupied.
- This core bit is in one piece with a connected double-start spiral, whose Drill head ends in an axially parallel surface of the two opposite cutting blades run out, see above that these two cutting blades are very globular, while the two others are arranged at right angles to it Cutting blades strong due to the respective conveyor helix are undercut.
- the rock drill according to the invention with the characteristic Features of claim 1 has the advantage that a drilling tool is created, which compared to the known drilling tools optimized in several ways and was improved. In particular, one for one one piece tool despite acceptable light weight one-piece construction achieved, as well as a robust tool with easy handling. Due to the special shape of the Drill head in connection with one piece herewith Continuous production helices are both high drilling performance in new and used condition and therefore a long one Lifetime reached.
- the invention has for its object the advantageous Properties of a drilling tool of the introductory Type, i.e. a drill bit such as that shown in DE-28 56 205 A1 of DE 27 56 990 C2 or DE-U 90 02 460 shown is to improve that increased drilling performance can be achieved.
- the invention is based on one Tool from, in which the spiral conveyor in one piece with the Drill head is connected. This will wear the Drill helix reduced and thus the service life considerably improved.
- a drill head with an integral part Funding spiral has the disadvantage that due to the A very global run-out of the feed spiral in the drill head Tool is formed in the area of the drill head. Is the Training of the individual cutting blades based on this one-piece construction very different, i.e.
- Drill head such as that DE-OS-28 56 205 (Hilti) or DE 36 14 010 A1 (Krupp) show is connected with the drill head in one piece Funding spiral not known.
- the invention begins in that a Drilling tool is created with a drill head, in which the drill head despite a one-piece connection with a Conveying spiral as symmetrical and bell-shaped as possible Maintains outer contour, as is principally stated in the above State of the art (HILTI), but without a helix is shown.
- HILTI State of the art
- This can be done in one piece integrated conveyor spiral can be achieved in that the Run-out area at the end of the feed helix on the drill head side and especially the following wall section on Drill head is shaped so that not only one cylindrical outer contour with helix outer diameter in this drill head section, but a harmonious transition is achieved by the helix in the drill head.
- the aim of the drilling tool is therefore one, if possible symmetrical and in particular bell-shaped drill head create, in which the transition from the conveyor spiral in the drill head is designed such that an approximately Bell-shaped outer contour of the drill head largely preserved remains. This is ensured by appropriate waist or concave formations of the spiral feed outlet subsequent drilling head area achieved. Through this Measures a drilling tool is created, the highest Strains are sufficient without voltage peaks and thus there is a risk of breakage in the drill head. Equally wears the spiral conveyor with its guidance to high drilling performance and long service life.
- the transition from the spiral conveyor in the Shaft area in turn harmoniously without essential Cross-sectional jumps are made by an arcuate transition the outlet of the feed spiral is provided in the drill shaft is. Due to large radii at the transition of the drill shank in the entry area of the conveyor spiral becomes voltage peaks avoided in these areas if possible.
- the entire drill shaft as little as possible Cross-sectional jumps that lead to voltage peaks.
- Drill diameters of, for example, 65 or 80 mm
- This Diameter transition is in the tool according to the invention executed by conical shaft areas, whereby according to the invention cylindrical between the conical areas Areas are provided where the drill shank is for Processing can be easily clamped in a jaw chuck can.
- This allows a long drill shaft, the length of which Can have 300 mm and more, by means of a Friction welding process or the like with the conveyor spiral get connected.
- the alignment of the shaft can be done by the Clamping the partly conical shaft to the cylindrical shaft sections are made.
- the formation of the rock drill is particularly advantageous in that the drill head four of breakthroughs or Grooves has broken ring segments like this in principle from DE 28 56 205 with three ring segments is known.
- the ring segments are, however, according to the invention in their frontal area roof-shaped or V-shaped, so that the slanted in relation to the longitudinal axis of the drill Cutting pin trim on the two flanks of the roof-shaped Training can be put on. This ensures an optimal Frontal application of force to the rock.
- the outside diameter of the drill head is expedient chosen larger than the outer diameter of the conveyor helix in order to avoid tilting of the tool, but still a optimal longitudinal guidance is retained.
- the spiral conveyor is expediently only as long manufactured as this is absolutely necessary for the removal of Drilling powder is required.
- the length is expedient the conveyor spiral is at least twice as large as that Drill head diameter chosen to be adequate To achieve drill head support and drilling dust removal.
- the pot-shaped drill head has a cutting blade base, the cross section between the radially outer Edge segment and the centrally arranged centering tip is arched or circular. This has the Advantage that there is no high surface pressure at any point flat surfaces are available.
- the arcuate or circular bottom of the cutting blades also has a known Cutting tool trimmings on, but the one immediately next to a radial groove, the other in the middle on one Cutting blade is arranged. Due to the radial offset this cutting pins and the arrangement on the in Cross-section circular bottom results in an optimal Drill bit discharge from this recessed arcuate Part of the cutting wing.
- the between the ring segments Existing recesses or grooves protrude as far as possible far into the center of the drill head, to the extent possible simply collect the drilling dust there into the drilling dust grooves to remove the helix. In the area of the outlet the spiral is the groove for this arranged in the radially outer conveyor spiral there respectively.
- Fig. 1, 1a in two side views and in Fig. 1b in Drilling tool 1 shown in plan view consists of a Drill shank 2 and a drill head 3, which also in the following "Cross boring head” is called. Between the drill head 3 and Drill shaft 2 is in one piece with this connected conveyor helix 4, the double helix or two-start helix with the helices 4 ', 4' 'is formed.
- the drilling head 3 of the drilling tool has a central one Drill head tip 5 with a roof-shaped Carbide cutting element 6 is equipped.
- the rock drill 1 Formation of a drill bit 4 extending radially Cutting blades 7 to 10, which are cut out or Grooves 11, 11 'or 12, 12' separated or interrupted are.
- FIG. 1a results from the Side view of Fig. 1 and 1b from the viewing direction of Arrow 13 in Fig. 1b.
- FIGS. 2b and 2c show a longitudinal section through the wings 7, 9 with the material support of the conveyor helix 4 ', 4''in the subsequent area 14, the concave constriction 15 leading to a material cross section 38 which is approximately equally thick in its wall thickness s 1 like the wall thickness s 2 of the cross-section 39 of the two vanes 8, 10, which lie above the respective spiral feed groove 4 ', 4'', ie are not material-supported.
- the cutouts 11, 11 'in the area of the outlet 17 of the respective conveyor helix 4', 4 '' lie on a larger drill core diameter d 1 , since this area is considerably larger than the core diameter d 2 in the area of the cutouts 12, 12 '. Accordingly, the recesses 11, 11 'must be guided in an approximately 45 ° bevel 16 into the outlet of the respective conveyor helix 4', 4 '' (outlet edge 17). In contrast, the recesses 12, 12 'can be guided almost vertically in the respective lower sections of the conveyor helix 4', 4 ''. The associated outlet slope 18 can therefore be kept very steep (see Fig. 1b).
- each cutting blade 7 to 10 each has a ring segment 19, which is formed in its front area a roof-shaped configuration with a first outwardly facing slope 21 and a second inwardly facing slope 22.
- each ring segment 19 has at least one cutting element 23, 23 'or 24, 24', at least on its outer bevel 21.
- the two ring segments 19 of the cutting blades 7, 9 have a further cutting element 25, 25 'on the inward slope 22.
- the two cutting blades 7, 9 each have on their roof-shaped bevels 20 two cutting elements 24, 25 and 24 ', 25', respectively, which are arranged asymmetrically with the angle indications ⁇ shown in FIG. 1b, the angle ⁇ at 0 designated lower position in Fig. 1b begins.
- the cutting blades 8, 10 each have a cutting element 23, 23 'only on their outer bevels 21, which are arranged symmetrically on the respective cutting blade.
- the cup-shaped design of the drill head 3 to the side of the drill head tip 5 each has an arcuate or semicircular course, which is referred to as a circumferential, arcuate base 28.
- the circumferential bottom 28 of the cutting blades is therefore strongly arched, so that this always results in an axial thrust on the drilling dust collected therein in order to feed it into the recesses 11, 12.
- the arcuate bottom 28 has, for example in the cutting blade 7 or 10, a further cutting element 26, which at an angle ⁇ 2 ⁇ 30 ° with respect to an axis-parallel vertical 40 inwards towards the drill axis 30 is inclined.
- the central axis 29 of the cutting element 26 forms the surface normal to the arcuate surface 28.
- the arrangement of the cutting element 26 is at the same angular distance ⁇ 6 as the arrangement of the cutting element 23 'on the slope 21.
- the arcuate base 28 has a further cutting element 27, which is also inclined outward by an angle ⁇ 3 ⁇ 30 ° with respect to an axis parallel 40. According to the additional illustration in FIG. 1 b, this cutting element 27 is arranged radially further inwards than the cutting element 26.
- the central axis 29 in turn forms the surface normal to the arcuate base surface 28 of the drill head.
- the two cutting elements 24, 24 'with the central axis 29 and the two cutting elements 25, 25' with the central axis 29 ' are also inclined at an angle ⁇ 1 ⁇ 30 ° to a vertical 40.
- the arcuate base 28 can be trough-shaped in the lower section in drilling tools with larger drilling diameter D 1 , ie the centers 41, 41 'of the radii R 1 are laterally apart by an amount S 3 , so that there is a corresponding flat floor area 42 with the same width S 3 .
- Fig. 1a the angle ⁇ ⁇ 120 to 130 ° for the roof-shaped slope of the hard metal cutting element 6 is additionally shown.
- the diameter D 2 of the drill head tip 5 is D 2 ⁇ 12 mm with a drilling tool of D 1 ⁇ 65 mm.
- the length l 1 of the conveyor helix 4 is dimensioned such that it is at least twice as large as the diameter D 1 , ie l 1 ⁇ 2 x D 1 .
- FIG. 3a again shows the view of the drilling tool according to FIG. 1
- FIG. 3b shows the lower inlet area 36, 36 'of the respective conveyor helix 4', 4 ''.
- This transition or inlet area of the feed helix 4, 4 'from the drill shaft 2 into the helical area is designed such that the radially outer end 43, 43' leads tangentially to the outer diameter D 4 of the drill shaft 2 via an arcuate curve 37, 37 '.
- This arcuate or spiral inlet of the respective conveyor helix is shown in FIG. 3b with the arrows 44.
- the curve 45, 45 ' which is also shown in FIG. 3b, results from the rounded transition of the respective adjacent conveyor helix 4', 4 ''.
- the area lying between the curves 37, 45 and 37 ', 45' runs with the large radius of curvature R 2 into the drill shank 2 (FIG. 3a), so that stress peaks are avoided.
- the greatly rounded outlet 37, 37 'of the respective feed helix 4', 4 '' in the drill shaft 2 further prevents jamming of the feed helix ends in a bore wall.
- Fig. 4 shows the complete drilling tool with attached Drill shank 2, which is shown again in isolation in Fig. 4a is.
- the drill shaft 2 has a total length l 3 , which is generally more than 300 mm.
- the drill shank 2 is generally connected to the cylindrical end 46 below the feed helix 4 via a friction weld connection 31.
- the diameter D 4 at this interface 31 is larger than the diameter D 5 of the lower clamping part 33, so that the drill shaft tapers over its length l 3 .
- this taper can be achieved by a one-piece conical component or by cylindrical Paragraphs with cross-sectional jumps are made.
- Cylindrical shoulders for tapering the diameter of the Drill shafts have a conical version Disadvantage that voltage peaks at every jump in diameter due to the impact of the drilling tool can arise that lead to an increased burden on the Guide drilling tool.
- shock impulses shock wave reflections which adversely affect the tool and especially the Impact the strength of the tool.
- due to the cross-sectional jumps the vibration behavior of a such tool adversely affected. Meet these criteria reinforced on a drilling tool with a one-piece conveyor spiral because the weight and the vibration behavior of the Conveying helix also on the following drill shaft affects.
- a disadvantage of a conical Execution of the drill shank is however the most unfavorable Possibility of holding and clamping during friction welding and during Straightening the drill shank. In particular arise at very different lengths of the drill shank different cone angles, the special jaws or special collets for clamping such a conical Require shaft.
- the invention provides that the drill shank 2 is designed in steps from the lower insertion end or clamping part 33 to the upper drill head connection, the transitions of the steps each being conical.
- This design achieves the advantage of increased performance, ie better passage of the impact impulses and the avoidance of reflections on the heels.
- the batch-wise cylindrical design also enables problem-free picking up and clamping of the drill shaft both in the production of the friction weld connection 31 and in the straightening of such a tool. With different lengths of the drill shank, the respective areas can be optimally designed. Measurements have shown that significant improvements in performance can be achieved through these measures. In the exemplary embodiment of such a drill shaft according to FIG.
- the drill shaft 2 is connected to the feed helix 4 via the friction weld connection 31, at least the uppermost part 32 with the length l 4 being designed as a cylindrical shaft part 32 and with this cylindrical shaft part 32 and the lower one Clamping part 33 for the drive machine, in particular two conical shaft sections 34, 35 with a length l 5 and l 7 are provided.
- the drill shaft 2 accordingly consists in sections of an upper cylindrical section 32 with the length l 4 , a subsequent conical section 34 with the length l 5 , a further cylindrical shaft section 47 with the length l 6 and a further conical shaft section 35 with the length l 7 , which is followed by the clamping part 33 with the length l 8 .
- the lengths l 4 , l 6 of the cylindrical shaft sections 32, 47 have an axial length which preferably corresponds to two to four times the upper shaft diameter D 4 in order to obtain a sufficient length for clamping this shaft part.
- the drill shaft can on its cylindrical parts easily into a normal one Chuck or jaw chuck or in other usual Clamps are used.
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Mining & Mineral Resources (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
- Drilling Tools (AREA)
Description
- Fig. 1
- eine Seitenansicht des Bohrwerkzeugs mit einteiliger Doppelförderwendel,
- Fig. 1a
- eine Seitenansicht (Drehung um 90°) des Bohrwerkzeugs nach Fig. 1 mit einem Teilschnitt durch den Bohrkopf,
- Fig. 1b
- eine Draufsicht auf das Bohrwerkzeug gemäß Fig. 1
- Fig. 2a bis 2c
- eine vergrößerte Darstellung des Bohrkopfes mit Teilschnitten,
- Fig. 3a, 3b
- eine Ansicht des Bohrwerkzeuges nach Fig. 1 (Fig. 3a) mit einer Ansicht des Förderwendeleinlaufes (Fig. 3b),
- Fig. 4
- ein Bohrwerkzeug mit konisch/zylindrischem Schaft und
- Fig. 4a
- eine nähere Darstellung des Schaftes nach Fig. 4.
Claims (16)
- Bohrwerkzeug, insbesondere Gesteinsbohrer zur Herstellung von Durchbrüchen in Beton oder Mauerwerk oder dgl., mit einem Bohrerschaft sowie mit einem mit Hartmetall bestückten, einen weitestgehenden symmetrischen Aufbau aufweisenenden Bohrkopf, welcher sich radial erstreckende, einen weitestgehend gleichen Längsquerschnitt aufweisende Schneidflügel umfaßt, wobei dem Bohrkopf eine einstückig mit diesem verbundene Förderwendel zugeordnet ist und wenigstens eine Aussparung im Bohrkopf als Bohrmehlauslauf in der zugehörigen Förderwendel mündet, dadurch gekennzeichnet, daß der Übergang zwischen Bohrkopf (3) und Förderwendel (4) eine umlaufende konkave Einschnürung (15) derart aufweist, daß der Bohrkopf (3) mit Förderwendelauslauf einen in Seitenansicht glockenförmigen, symmetrischen Aufbau erhält.
- Bohrwerkzeug nach Anspruch 1, dadurch gekennzeichnet, daß vier von Aussparungen (11, 11', 12, 12') unterbrochene Schneidflügel (7 - 10) mit radial außenliegenden, sich axial erstreckenden Ringsegmenten (19) zwei gegenüberliegende Aussparungen (11, 11') oder Auskehlungen zugeordnet sind, die jeweils einen zur Bohrlängsachse (30) hin gerichteten schrägen Auslauf (16) von ca. 45° gegenüber einer Achsparallelen zur Bohrerlängsachse (30) aufweisen, die in den Auslauf (17) der jeweiligen Bohrmehlnut einer doppelgängigen Förderwendel (4', 4'') münden, und daß zwei weitere Aussparungen (12, 12') einen weitestgehend achsparallelen Auslauf mit einer steilen Schräge (18) zu den darunterliegenden Förderwendeln (4', 4'') aufweisen.
- Bohrwerkzeug nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Außendurchmesser (D1) des Bohrkopfes um etwa 10 % größer ist als der Außendurchmesser (D3) der Förderwendel (4).
- Bohrwerkzeug nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die axiale Länge (l1) der Förderwendel (4) wenigstens doppelt so groß ist wie der Außendurchmesser (D1) des Bohrkopfes (3).
- Bohrwerkzeug nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Bohrkopf (3) topfförmig ausgebildet ist und einen zu einer Zentrierspitze hin halbkreisförmig gewölbten, umlaufenden Boden (28) aufweist.
- Bohrwerkzeug nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Stirnseite der Schneidflügel (7 bis 10) Ringsegmente (19) mit einem dachförmigen oder V-förmigen Querschnitt (20) aufweist, und daß wenigstens die radial außen liegenden Schrägen (21) der dachförmigen Fläche (20) Hartmetall-Schneidstifte (23, 23'; 24, 24') aufweisen.
- Bohrwerkzeug nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die radial innenliegende schräge Fläche (22) der dachförmigen Stirnfläche (20) jedes Ringsegments (19) wenigstens bei zwei gegenüberliegenden Schneidflügeln (7, 9) Hartmetall-Schneidstifte (25, 25') aufweist.
- Bohrwerkzeug nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß wenigstens ein Teil der Hartmetall-Schneidstifte (24, 24', 25, 25') auf der dachförmigen Stirnfläche (20) der Schneidflügel (8, 10) asymmetrisch angeordnet sind.
- Bohrwerkzeug nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß ein bogenförmiger Boden (28) in einem topfförmigen Bohrkopf (3) vorgesehen ist, der wenigstens zwei, asymmetrisch und in unterschiedlichen radialen Abständen zur Bohrerlängsachse (30) angeordnete Schneidstifte (26, 27) aufweist.
- Bohrwerkzeug nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der radial außenliegende Hartmetall-Schneidstift (26) im bogenförmigen Boden (28) in dem nach dem Auslauf (17) der Förderwendel (4, 4') vorhandenen Wandungsabschnitt (14) angeordnet ist.
- Bohrwerkzeug nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß die Mittelachsen (19, 29') aller Hartmetallstifte einen Winkel α1 = α 2 etwa = 30° gegenüber einer achsparallelen Vertikalen (40) einschließen und daß die Mittelachsen (29, 29') jeweils die Flächennormalen auf die Einsatzflächen (20, 28) der Hartmetallstifte bilden.
- Bohrwerkzeug nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß wenigstens ein radial innenliegenden Schneidelement (27) im bogenförmigen Boden (28) im Bereich des schrägen Auslaufs (11, 12) angeordnet ist.
- Bohrwerkzeug nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Förderwendelrücken (49) der Förderwendel (4', 4'') im Bereich des Förderwendeleinlaufs (48) am Bohrerschaft (2) ausgehend vom Außendurchmesser (D3) sich bogenförmig oder spiralförmig an den Schaftdurchmesser (2) annähert und tangential übergeht, wobei der Förderwendeleinlauf (48) weitestgehend an der Bohrerschaftmantelfläche beginnt.
- Bohrwerkzeug nach Anspruch 1, dadurch gekennzeichnet daß, der Bohrerschaft (2) über eine Reibschweißverbindung (31) verlängert ist, wobei wenigstens der der Förderwendel (4) zugewandte Teil (32) als zylindrisches Schaftteil (32) ausgebildet ist und daß zwischen diesem zylindrischen Schaftteil (32) und einem zylindrischen Einspannteil (33) für die Antriebsmaschine wenigstens ein oder zwei konische Schaftteilabschnitte (34, 35) vorgesehen sind.
- Bohrwerkzeug nach Anspruch 14, dadurch gekennzeichnet, daß der Bohrerschaft (2) abschnittsweise aus einem oberen zylindrischen Schaftabschnitt (32), einem nachfolgenden konischen Schaftabschnitt (34), einem weiteren zylindrischen Schaftabschnitt (47) und einem weiteren konischen Schaftabschnitt (35) ausgebildet ist, dem sich der zylindrische Einspannteil (33) anschließt.
- Bohrwerkzeug nach Anspruch 14 oder Anspruch 15, dadurch gekennzeichnet, daß die zylindrischen Schaftabschnitte (32, 47) eine axiale Länge (l4, l6) aufweisen, die wenigstens das zwei- bis vierfache des oberen Schaftdurchmessers (D4) entspricht.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE4236553A DE4236553A1 (de) | 1992-10-29 | 1992-10-29 | Gesteinsbohrer |
DE4236553 | 1992-10-29 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0595214A2 EP0595214A2 (de) | 1994-05-04 |
EP0595214A3 EP0595214A3 (de) | 1995-03-01 |
EP0595214B1 true EP0595214B1 (de) | 1998-01-14 |
Family
ID=6471663
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP93117125A Expired - Lifetime EP0595214B1 (de) | 1992-10-29 | 1993-10-22 | Gesteinsbohrer |
Country Status (3)
Country | Link |
---|---|
US (1) | US5403130A (de) |
EP (1) | EP0595214B1 (de) |
DE (2) | DE4236553A1 (de) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1092395B1 (de) * | 1993-06-10 | 2004-04-07 | Karlin Technology, Inc. | Schutzvorrichtung mit zwei Durchführungen zur Chirurgie des Zwischenwirbelraums |
DE4338667A1 (de) * | 1993-11-12 | 1995-05-18 | Hilti Ag | Bohrwerkzeug |
US5915485A (en) * | 1997-01-13 | 1999-06-29 | Mcatavey; Dennis B. | Ski post hole auger bit |
DE19748987B4 (de) * | 1997-11-06 | 2007-11-22 | Robert Bosch Gmbh | Bohrwerkzeug insbesondere für drehschlagendes Bohren von vorzugsweise Gestein |
US6196091B1 (en) | 1999-03-17 | 2001-03-06 | Thomas & Betts International | Drill bit for applying torque to a fastener |
US6374931B1 (en) * | 1999-11-03 | 2002-04-23 | Relton Corporation | Multiple cutter rotary hammer bit |
DE20016012U1 (de) | 2000-09-15 | 2000-11-30 | Drebo Werkzeugfabrik Gmbh, 88361 Altshausen | Gesteinsbohrer |
US20020164218A1 (en) * | 2001-02-28 | 2002-11-07 | Ruben Aguirre | Fluted drill tool with frustum cutters |
US8517644B2 (en) * | 2007-06-07 | 2013-08-27 | Allied Machine & Engineering Corporation | Adjustable indexable drill and modular system and holder |
US8926237B2 (en) * | 2011-07-11 | 2015-01-06 | Kennametal Inc. | Multi-piece twist drill head and twist drill including the same |
US10507534B2 (en) | 2016-03-17 | 2019-12-17 | O-Tags, Inc. | Systems, methods, and apparatus for reliably installing survey tags |
EP3581756A1 (de) * | 2018-06-11 | 2019-12-18 | HILTI Aktiengesellschaft | Bohrvorrichtung |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3614010A1 (de) * | 1986-04-25 | 1987-11-05 | Krupp Gmbh | Gesteinsbohrer |
DE3919264A1 (de) * | 1989-06-13 | 1990-12-20 | Duss Maschf | Drehschlagbohrer fuer ein von hand fuehrbares bohrgeraet |
Family Cites Families (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2383212A (en) * | 1944-02-19 | 1945-08-21 | Walter B Pohle | Shank construction |
DE2152127C3 (de) * | 1971-10-20 | 1982-05-06 | Meißner, Joachim, 2000 Hamburg | Gesteinsbohrer |
DE2756990C2 (de) * | 1977-12-21 | 1986-03-27 | Fried. Krupp Gmbh, 4300 Essen | Gesteinsbohrer |
DE2856205A1 (de) * | 1978-12-27 | 1980-07-10 | Hilti Ag | Gesteinsbohrer |
DE8025879U1 (de) * | 1980-09-27 | 1981-02-12 | Toepfer, Rainer, 2807 Achim | Gesteindrehschlagbohrer o.dgl. |
DE8104116U1 (de) * | 1981-02-14 | 1982-08-05 | Robert Bosch Gmbh, 7000 Stuttgart | Gesteinsbohrer |
DE3540355C2 (de) * | 1985-11-14 | 1996-01-11 | Duss Maschf | Bohrer zum drehschlagenden Bohren |
DE3635538A1 (de) * | 1986-10-18 | 1988-04-28 | Hawera Probst Kg Hartmetall | Bohrwerkzeug mit austauschbarer foerderwendel |
GB2212091B (en) * | 1987-11-12 | 1992-01-22 | Boart Hardmetals | Drilling equipment |
DE3809428A1 (de) * | 1988-03-21 | 1989-10-12 | Hilti Ag | Gesteinsbohrkrone |
DE3813849A1 (de) * | 1988-04-23 | 1989-11-02 | Hawera Probst Kg Hartmetall | Gesteinsbohrer |
DE3820697A1 (de) * | 1988-06-18 | 1989-12-21 | Hawera Probst Kg Hartmetall | Bohrwerkzeug |
DE9002460U1 (de) * | 1990-03-02 | 1990-05-03 | Drebo Werkzeugfabrik GmbH, 7963 Altshausen | Kronenbohrer |
US5265688A (en) * | 1990-04-09 | 1993-11-30 | Hilti Aktiengesellschaft | Rock drill |
DE4024650A1 (de) * | 1990-08-03 | 1992-02-06 | Hilti Ag | Meissel mit optimiertem schaft |
-
1992
- 1992-10-29 DE DE4236553A patent/DE4236553A1/de not_active Withdrawn
-
1993
- 1993-10-22 EP EP93117125A patent/EP0595214B1/de not_active Expired - Lifetime
- 1993-10-22 DE DE59307989T patent/DE59307989D1/de not_active Expired - Fee Related
- 1993-10-29 US US08/143,144 patent/US5403130A/en not_active Expired - Fee Related
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3614010A1 (de) * | 1986-04-25 | 1987-11-05 | Krupp Gmbh | Gesteinsbohrer |
DE3919264A1 (de) * | 1989-06-13 | 1990-12-20 | Duss Maschf | Drehschlagbohrer fuer ein von hand fuehrbares bohrgeraet |
Also Published As
Publication number | Publication date |
---|---|
EP0595214A3 (de) | 1995-03-01 |
US5403130A (en) | 1995-04-04 |
DE4236553A1 (de) | 1994-05-05 |
DE59307989D1 (de) | 1998-02-19 |
EP0595214A2 (de) | 1994-05-04 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP0778100B1 (de) | Drehschlag-Wendelbohrer | |
EP0790877B1 (de) | Bohrwerkzeug | |
EP0595214B1 (de) | Gesteinsbohrer | |
DE3820695C2 (de) | Gesteinsbohrer | |
EP0778391A2 (de) | Drehschlag-Wendelbohrer | |
EP0685629A2 (de) | Gesteinsbohrer | |
EP1259699B1 (de) | Gesteinsbohrer | |
EP0707129B1 (de) | Bohrwerkzeug mit Trägerkörper und Schneidkörpern | |
DE69524621T2 (de) | Gesteinsbohrer sowie schneideinsätze | |
DE60106587T2 (de) | Schlagbohrmeissel | |
EP1314506B1 (de) | Gewindeschneidwerkzeug | |
EP0730082A2 (de) | Bohrkrone für drehschlagendes Bohren von vorzugsweise Gestein, Beton oder dergleichen | |
EP0653544B1 (de) | Spiralbohrer | |
EP1015727B1 (de) | Bohrwerkzeug | |
EP0771934B1 (de) | Bohrwerkzeug, insbesondere zur Bearbeitung von Gestein | |
EP1083295B1 (de) | Bohrwerkzeug | |
EP0334806B1 (de) | Gesteinsbohrkrone | |
EP0778390B1 (de) | Drehschlag-Wendelbohrer | |
DE2420442B2 (de) | Schlagbohrkrone | |
DE19709771B4 (de) | Gesteinsbohrer | |
DE19915304B4 (de) | Bohrwerkzeug | |
EP1083293A1 (de) | Bohrwerkzeug | |
EP3289162B1 (de) | Eisbohrer | |
DE4301191A1 (de) | Gesteinsbohrwerkzeug | |
EP1188897B1 (de) | Gesteinsbohrer |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
AK | Designated contracting states |
Kind code of ref document: A2 Designated state(s): CH DE DK FR GB IT LI SE |
|
PUAL | Search report despatched |
Free format text: ORIGINAL CODE: 0009013 |
|
AK | Designated contracting states |
Kind code of ref document: A3 Designated state(s): CH DE DK FR GB IT LI SE |
|
17P | Request for examination filed |
Effective date: 19950707 |
|
17Q | First examination report despatched |
Effective date: 19960208 |
|
GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
GRAG | Despatch of communication of intention to grant |
Free format text: ORIGINAL CODE: EPIDOS AGRA |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
GRAH | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOS IGRA |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): CH DE DK FR GB IT LI SE |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRE;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.SCRIBED TIME-LIMIT Effective date: 19980114 Ref country code: GB Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 19980114 Ref country code: FR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 19980114 |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: EP |
|
REF | Corresponds to: |
Ref document number: 59307989 Country of ref document: DE Date of ref document: 19980219 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 19980414 Ref country code: DK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 19980414 |
|
EN | Fr: translation not filed | ||
RAP2 | Party data changed (patent owner data changed or rights of a patent transferred) |
Owner name: ROBERT BOSCH GMBH Owner name: HAWERA PROBST GMBH |
|
GBV | Gb: ep patent (uk) treated as always having been void in accordance with gb section 77(7)/1977 [no translation filed] |
Effective date: 19980114 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: LI Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 19981031 Ref country code: CH Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 19981031 |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
26N | No opposition filed | ||
REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20071219 Year of fee payment: 15 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20090501 |