EP3645229B1 - Foret pour le burinage de roche - Google Patents

Foret pour le burinage de roche Download PDF

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Publication number
EP3645229B1
EP3645229B1 EP18731458.8A EP18731458A EP3645229B1 EP 3645229 B1 EP3645229 B1 EP 3645229B1 EP 18731458 A EP18731458 A EP 18731458A EP 3645229 B1 EP3645229 B1 EP 3645229B1
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EP
European Patent Office
Prior art keywords
drill
cutting edges
drill bit
base
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.)
Active
Application number
EP18731458.8A
Other languages
German (de)
English (en)
Other versions
EP3645229A1 (fr
Inventor
Klaus-Peter Bohn
Roland Foser
Markus Hartmann
Bastian PLÜMACHER
Carsten Peters
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hilti AG
Original Assignee
Hilti AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hilti AG filed Critical Hilti AG
Publication of EP3645229A1 publication Critical patent/EP3645229A1/fr
Application granted granted Critical
Publication of EP3645229B1 publication Critical patent/EP3645229B1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D17/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D17/02—Percussive tool bits
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28D—WORKING STONE OR STONE-LIKE MATERIALS
    • B28D1/00—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor
    • B28D1/14—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by boring or drilling
    • B28D1/146—Tools therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28D—WORKING STONE OR STONE-LIKE MATERIALS
    • B28D7/00—Accessories specially adapted for use with machines or devices of the preceding groups
    • B28D7/02—Accessories specially adapted for use with machines or devices of the preceding groups for removing or laying dust, e.g. by spraying liquids; for cooling work
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2217/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D2217/0003—Details of shafts of percussive tool bits
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2217/00—Details of, or accessories for, portable power-driven percussive tools
    • B25D2217/0057—Details related to cleaning or cooling the tool or workpiece
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
    • B25D—PERCUSSIVE TOOLS
    • B25D2222/00—Materials of the tool or the workpiece
    • B25D2222/72—Stone, rock or concrete

Definitions

  • the present invention relates to a drill for chiseling rock.
  • the invention relates to a drill in which the drilling material that is produced can be transported away via a hollow shaft.
  • the drill does not have and does not require a helical shaft.
  • a drill according to the preamble of claim 1 is from U.S. 3,163,246 A famous.
  • the invention relates to a drill with the features of claim 1.
  • the drill for chiselling rock has a striking face at one insertion end, a hollow shaft within which a conveying channel is provided and a drill head.
  • the drill head has three or more cutting edges and one or more suction openings on one face.
  • Inside the drill head there are suction channels that connect the suction openings with the delivery channel.
  • a first section of the suction channel adjoining the suction opening has a first inclination relative to the drill axis
  • a second section of the suction channel adjoining the hollow shaft has a second inclination relative to the drill axis.
  • the second slope is greater than the first slope.
  • the lower inclination of the intake duct in the upper area is advantageous with regard to the degradation performance.
  • the shock wave sees little or no radial deflections due to the more axially parallel boundary surfaces.
  • the first slope can be less than 5 degrees.
  • the second slope can be between 15 degrees and 30 degrees.
  • the second section of the intake duct is continuously curved.
  • the drill head provides a base in which the cutting edges are embedded, the base partially surrounding the cutting edges in a circumferential direction.
  • the base consists at least partially of a sintered steel.
  • a section of the base surrounding the cutting edges can be made of tungsten carbide.
  • the base consists entirely of a sintered steel.
  • a cross section of the intake channels increases from the intake opening to the delivery channel.
  • the suction openings are triangular.
  • the cutting edges of the drill head are preferably made of sintered tungsten carbide.
  • the hard material is particularly suitable for chiselling rock.
  • the cutting edges can have a rake face and a flank face, both of which form part of the striking face and touch one another along a chisel edge.
  • the geometry is particularly suitable for the chiselling of rock.
  • Fig. 1 shows an exemplary drill 1.
  • the drill 1 has a drill head 2 with suction openings 3 , a hollow shaft 4 with a suction connection 5 and a Insertion end 6 with a striking surface 7.
  • a sleeve 8 can enclose the suction connection 5.
  • the drill 1 is designed for the dismantling of mineral building materials, such as concrete, bricks.
  • the insertion end 6 can be used in a handheld power tool, for example a drill or a hammer drill.
  • An impact mechanism of the hand machine tool strikes periodically on the striking surface 7 at the insertion end 6.
  • the shock wave of the impact runs through the hollow shaft 4 in the impact direction 9 up to the drill head 2.
  • the drill head 2 shatters the mineral material.
  • the drill 1 is preferably rotated in a direction of rotation 10 about its drill axis 11 between the blows.
  • the drill 1 then hits the material in different orientations.
  • the drilling material that is produced can be removed from the borehole directly from the end face 12 of the drill 1.
  • a vacuum cleaner is connected to the cuff 8 .
  • the air flow sucks the cuttings into the suction openings 3 directly on the end face 12 of the drill 1 .
  • the cuttings are transported away within the hollow shaft 4.
  • the exemplary drill head 2 has a base 13 and several cutting edges 14 embedded in the base 13.
  • the cutting edges 14 form the tip 15 of the drill head 2.
  • the cutting edges 14 protrude from the base 13 in the direction of impact 9 .
  • the end face 12 of the drill head 2 is composed of the end faces 16 of the cutting edges 14 pointing in the impact direction 9 and the end faces 17 of the base 13 .
  • the base 13 has a cylindrical jacket surface 18.
  • the cutting edges 14 preferably protrude in the radial direction with respect to the jacket surface 18 .
  • the circumferential surface 18 can be closed below the cutting edges 14 .
  • An underside 19 of the base 13 is arranged on the hollow shaft 4 .
  • the underside 19 can be welded, soldered or connected to the shaft 4 in an analogous manner with a material fit.
  • the drill head 2 can be connected by means of a screw connection, a bayonet lock or preferably a press-fit connection ( Fig. 6 ) be connected to the shaft 4 .
  • the cutting edges 14 are preferably made of a sintered material containing tungsten carbide.
  • a section 20 of the base 13 surrounding the cutting edges 14 can be made from the sintered tungsten carbide-containing material and a section 21 forming the underside can be made from the sintered iron-based material ( Fig. 3 ).
  • the cutting edges 14 are arranged in a star shape around the drill axis 11 .
  • the cutting edges 14 are monolithically connected, in particular connected to one another without a joining zone by welding, soldering, clamping, etc.
  • the cutting edges 14 are preferably sintered from a material containing tungsten carbide.
  • the cutting edges 14 are preferably regular or regularly arranged in pairs around the drill axis 11.
  • the four identical cutting edges 14 are arranged at intervals of 90 degrees in the direction of rotation 10 .
  • the cutting edges can be designed differently.
  • the drill head has main cutting edges and secondary cutting edges.
  • the exemplary embodiment shows four cutting edges 14; In other embodiments, the drill head 2 can have three, five or six cutting edges 14 .
  • the cutting edges 14 each have a chisel edge 22 which protrudes in the impact direction 9 and which runs in the radial direction towards a tip 15 of the drill head 2 .
  • the chisel edge 22 can be straight or curved.
  • the chisel edges 22 are preferably identical or identical in pairs. In the embodiment shown, all the chisel edges 22 run up to the tip 15 ; In other configurations, only the chisel edges of the main cutting edges extend to the point 15.
  • the single point 15 of the drill head 2 is preferably on the drill axis 11.
  • each cutting edge 14 pointing in the direction of impact 9 is formed by a rake face 23 and a free face 24 .
  • the rake face 23 and the flank face 24 are both facing in the direction of impact 9 and touching each other along the chisel edge 22.
  • the cutting face 23 and the flank face 24 are extended in the radial direction.
  • the rake face 23 and the flank face 24 extend from adjoining the outer edge face 25 to the drill axis 11 or in the vicinity of the drill axis 11.
  • the rake face 23 leads in the usual direction of rotation 10 of the drill head 2 in relation to the free face 24 . Looking at the drill head 2 , the usual direction of rotation 10 is counterclockwise.
  • the rake face 23 and the flank face 24 are inclined with respect to the drill axis 11.
  • the rake face 23 rises against the direction of rotation 10 in the direction of impact 9 ; the free surface 24 drops in the direction of impact 9 counter to the direction of rotation 10 .
  • the rake face 23 and the flank face 24 are accordingly inclined to one another.
  • a roof angle 26 between the rake face 23 and the flank face 24 is greater than 45 degrees, for example greater than 60 degrees and less than 120 degrees.
  • the roof angle 26 can be constant or changing in the radial direction.
  • An edge surface 25 of the cutting edges 14 facing away from the drill axis 11 is preferably oriented parallel to the drill axis 11. With its radial distance from the drill axis 11, the edge surface 25 defines the diameter 27 of the drill head 2.
  • the edge surface 25 forms a break-off edge 28 which rests against a borehole wall during drilling.
  • the rupture edges 28 assist in forming a circular-cylindrical shape of the borehole by breaking of the previous radial in the borehole rock.
  • the edge surface 25 is preferably in the radial direction opposite the jacket surface 18 of the cylindrical base 13 in front.
  • the cutting edges 14 subdivide an upper section of the lateral surface 18 into several cylindrical sectors. A lower section of the lateral surface 18 connected to the upper section is preferably closed around the circumference, ie completely cylindrical.
  • a plurality of suction openings 3 are provided on the end face 12 of the drill head 2.
  • the suction openings 3 can be arranged centrally between adjacent chisel edges 22 .
  • the suction openings 3 are preferably located in the end faces 17 of the base 13.
  • the suction openings 3 are circumferentially closed; for this purpose, the suction openings 3 are arranged at a distance from the lateral surface 18.
  • a radial distance between the suction openings 3 is, for example, between 5% and 20% of the diameter of the drill head 2.
  • the suction openings 3 are arranged along the drill axis 11 offset from the chisel edges 22 .
  • the suction openings 3 are located deeper than the chisel edges 22 and therefore do not influence the chiseling functionality of the drill head 2 or only to a negligible extent.
  • An axial offset 29 of the suction openings 3 to the tip 15 is preferably greater than 15% of the diameter 27 of the drill 1.
  • a suction channel 30 connects the suction openings 3 from the end face 12 to the underside 19 of the drill head 2.
  • the predetermined flow direction 31 is from the suction openings 3 to the underside 19 , ie against the impact direction 9.
  • the suction channel 30 is transverse to the flow direction via the entire length closed. For this purpose, the suction channel 30 runs completely within the base 13.
  • the suction channel 30 approaches the drill axis 11 along the flow direction 31 .
  • the approach does not take place in a straight line, but the intake duct 30 is curved at least in sections.
  • An upper section 32 of the suction channel 30 adjacent to the suction openings 3 is essentially parallel to the cutting edges 14 , ie to the drill axis 11.
  • the suction channel 30 does not approach the cutting edges 14 in the flow direction 31, or only to a small extent.
  • An approach of the suction channel 30 to the drill axis 11 in the upper section 32 is preferably less than 5% of the diameter 27 of the drill 1.
  • the center of gravity in the cross-sections perpendicular to the drill axis 11 can be used as a measure for determining the radial distance.
  • the upper section 32 extends over at least 50%, for example 75%, of the height of the cutting edges 14, preferably at least the entire height of the cutting edges 14.
  • the upper section 32 can be straight or curved.
  • a lower section 33 of the intake duct 30 adjacent to the hollow shaft 4 is inclined with respect to the cutting edges 14.
  • the lower section 33 increasingly approaches the drill axis 11 in the direction of the shaft 4 .
  • the lower section 33 of the intake duct 30 can be inclined into the hollow between 10 degrees and 30 degrees Run in shaft 4.
  • the suction channel 30 preferably approaches the drill axis 11 between 5% and 30% of the diameter 27 of the drill 1.
  • the exemplary lower section 33 is continuously curved.
  • the lower section can also be designed in a straight line.
  • a section connecting the upper section to the lower section is correspondingly curved.
  • All curved sections of the suction channel 30 preferably have a radius of curvature greater than 80% of the diameter 27 of the drill 1.
  • the suction channel 30 has smooth inner walls over its entire length. The gentle curvatures with the large radii of curvature favor a smooth transport of the cuttings in the suction channels 30. In particular, jamming or jamming of larger cuttings is avoided.
  • the suction openings 3 have an area proportion of 10% to 25% on the end face 12. The high proportion is advantageous in order to ensure that the cuttings are transported away.
  • the intake channel 30 can have a cross section that widens along the flow direction 31.
  • the intake channel 30 has the smallest cross section at or near the intake opening 3.
  • the change in cross section reduces the tendency of the intake channel 30 to become clogged.
  • the area of the cross section changes by at least 30%, preferably by more than 60%.
  • the area of the cross section is determined in planes perpendicular to the drill axis 11 .
  • the change preferably takes place completely or mainly within the upper section 32 , ie at the level of the cutting edges 14.
  • a radially outer wall of the suction channels 30 is preferably parallel to the drill axis 11 , while a radially inner wall of the intake channels 30 approaches the drill axis 11 , to get the cross-sectional expansion.
  • the exemplary suction openings 3 are non-circular.
  • the suction openings 3 have a triangular shape. Corners of the suction openings 3 can be pointed or rounded.
  • the sides connecting the corners can be straight or curved.
  • Characteristic of a triangle a circle can be inscribed in the suction opening 3 which touches each of the three sides at exactly one point. Furthermore, characteristic of a triangle, a distance between the center point of the inscribed circle on the sides decreases continuously starting from the corners up to the point touched by the circle.
  • One corner of the suction openings 3 faces the tip 15 of the drill head 2.
  • An interior angle 34 at the corner preferably corresponds approximately to the angular distance between the adjacent cutting edges 14, for example 90 degrees. In this context, for example, describes a deviation of less than 20%.
  • the area of the suction openings 3 is significantly larger than the area of the inscribed circle.
  • the surface area of the suction openings 3 is at least 30% larger, for example at least 100% larger.
  • the hollow shaft 4 has an along the drill axis 11 has extending conveyor channel 35.
  • the conveyor channel 35 has a constant cross section over the length of the shaft 4.
  • a surface area of the cross section of the conveyor channel 35 is preferably equal to the sum of the sections of the intake ports 30.
  • the conveyor channel 35 for example an area proportion of 15% to 65% of the cross section of the shank 4.
  • the conveying channel 35 can be arranged centrally on the axis of the drill bit 11 .
  • the conveying channel 35 ends below the drill head 2 , in particular below the base 13.
  • the end of the conveying channel 35 is preferably rounded in the shape of a dome.
  • the suction channels 30 of the drill head 2 open into the feed channel 35 of the hollow shaft 4.
  • the junction is at or near one end of the feed channel 35.
  • the surfaces at the junction are rounded.
  • the suction connection 5 is arranged at an end of the conveying channel 35 facing away from the drill head 2.
  • the suction connection 5 contains a radial opening 36 into the conveying channel 35.
  • the cuff 8 encloses the cylindrical shaft, preferably airtight, in the area of the opening 36. The cuff 8 can be rotated relative to the shaft 4.
  • the exemplary insertion end 6 of the drill 1 is designed for the use of rotary chiselling handheld power tools.
  • the insertion end 6 has a substantially cylindrical shape.
  • the insertion end 6 has two closed grooves 37 into which locking elements of the handheld power tool engage radially and can slide along the drill axis 11. Grooves 38 aligned longitudinally with respect to the drill axis 11 enable a torque to be introduced from the handheld power tool.
  • the drill 1 is preferably made of different materials.
  • the shaft 4 and the insertion end 6 are preferably made of a tough and ductile steel.
  • the cutting edges 14 of the drill head 2 are made of very hard and abrasion-resistant sintered tungsten carbide.
  • the tungsten carbide has a volume fraction of at least 70% by volume.
  • the metallic binder preferably contains one or more of the metals: cobalt and nickel.
  • the binder can consist entirely of cobalt.
  • the drill head 2 cannot be produced in the usual way in an original form, which is subsequently machined in order to form the suction channels 30.
  • a manufacturing method is proposed below with which the desired intake channels Let 30 form. The manufacturing process described can be modified in detail without deviating from its principle.
  • a thin powder layer is produced by spraying a suspension with tungsten carbide and the metallic binder.
  • An adhesive is printed on the powder layer in a structured manner. The adhesive traces a cross section through the drill head 2 . The deposition of a powder layer and the adhesive is repeated until a blank of the drill head 2 is reproduced.
  • the excess powder in particular in the suction channels 30 , can be removed by means of water. The water penetrates between the layers that are not bonded by glue and breaks them off. The resulting blank now corresponds to the shape of the drill head 2.
  • the green compact can be sintered.
  • the problem with the production of the drill head 2 is based on the high mechanical demands on the drill head 2 , which only allow a very low porosity.
  • a necessary density of the drill head 2 must be greater than 98% of the theoretically achievable value.
  • the green compact must have a density of at least 50% of the theoretical density before sintering.
  • the sintering is accompanied by typical shrinkage, which from this value onwards sufficiently closes the pores.
  • Conventional methods by pressing the green compact in a mold achieve these values.
  • a promising approach is based on a powder mixture of tungsten carbide and cobalt oxide.
  • the cobalt oxide is converted into cobalt after the green compact has been formed.
  • the suspension contains water or alcohol, preferably isopropyl alcohol, as a liquid.
  • the ratio of liquid to powder is in the range between 3 to 5 to 1.
  • the suspension can be sprayed evenly under pressure through a thin nozzle. After spraying, the layer is dried at a little above room temperature.
  • the layers have a uniform thickness in the range between 20 ⁇ m and 30 ⁇ m.
  • the adhesive is based on an aqueous solution of polyethyleneimine. Polyethyleneimine shows a very high affinity to bind to the grains of tungsten carbide. Good gluing is achieved in this way.
  • the weight fraction of polyethyleneimine in the solution can be in the range between 1% and 5%.
  • the glue is dried at a little above room temperature.
  • the adhesive is cured in an oven at around 150 degrees Celsius (° C).
  • the excess powder is then removed with water.
  • the cobalt oxide in the green compact is converted to cobalt by placing the green compact in a Hydrogen-containing atmosphere is kept at 600 ° C to 700 ° C for several hours.
  • the green compact can be sintered at a temperature between 1250 ° C and 1400 ° C.
  • the ferrous lower section 21 of the base 13 can also be produced using a three-dimensional shape.
  • a green compact can also be printed and then sintered.
  • processes such as laser deposition welding, selective laser melting (SLM) or selective laser sintering (SLS) are also possible.
  • FIGS. 5, 6 and 7 Another embodiment of the drill head 39 is shown in FIGS FIGS. 5, 6 and 7 shown.
  • the cutting edges 14 are cross-shaped, as in the embodiment of FIG Fig. 2 .
  • the cutting edges 14 are preferably sintered from tungsten carbide.
  • the base 40 has an upper section 41 and a lower section 42.
  • the base 40 is formed from one material.
  • the upper section 41 is also formed from a ferrous material.
  • the upper section 41 has a cross-shaped slot into which the cutting edges 14 are inserted.
  • the end face 12 of the drill head 2 thus consists of the hard cutting edges 14 and the end face 43 of the relatively softer base 40.
  • the cutting edges 14 can be soldered or welded to the base 40.
  • the suction channels 30 run closed in the upper section 41 of the base 13.
  • the suction channels 30 are spaced apart both from the circumference of the drill head 2 and from the cutting edges 14. The course of the channels and their further properties can correspond to the previous embodiment.
  • FIG Fig. 8 A drill head that does not form part of the invention is shown in FIG Fig. 8 shown.
  • the drill head 44 also has a base 40 and four cutting edges 14.
  • the base 40 and the cutting edges 14 can be shaped as in one of the preceding embodiments.
  • the suction openings 3 are arranged on the base 40 , the suction channels 30 run in the base 40 analogously to the previous embodiments.
  • the hollow shaft 45 has a conveying channel 46 and a core 47.
  • the core 47 is a rod-shaped solid structure which lies on the drill axis 11. An impact on the striking surface 7 is transmitted to the cutting edges 14 via the core 47.
  • the conveying channel 46 can, for example, encircle the core 47 Fig. 9 ).
  • the suction channels 30 open into the delivery channel 46.
  • the core 47 can be supported on the outer shell of the shaft 4 via struts 48 ( Fig. 10 ).
  • the struts 48 can the conveyor channel 46 into several channels, for example each intake channel 30 can

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Drilling Tools (AREA)
  • Earth Drilling (AREA)

Claims (10)

  1. Foret (1) destiné au burinage de roche, ledit foret comprenant une surface de frappe (7) à une extrémité d'enfichage (6),
    une tige creuse (4) à l'intérieur laquelle est ménagé un conduit de transport (35),
    une tête de forage (2) qui comporte trois arêtes de coupe (14) ou plus et une ou plusieurs ouvertures d'aspiration (3) sur une face frontale (12) et à l'intérieur de laquelle sont disposés des conduits d'aspiration (30) qui relient les ouvertures d'aspiration (3) au conduit de transport (35),
    caractérisé en ce que
    dans l'un au moins des canaux d'aspiration (30), une première portion (32) du conduit d'aspiration (30), adjacente à l'ouverture d'aspiration (3), présente une première inclinaison par rapport à l'axe de forage (11) et une deuxième portion (33) du conduit d'aspiration (30), adjacente à la tige creuse (4), présente une deuxième inclinaison par rapport à l'axe de forage (11) et la deuxième inclinaison est supérieure à la première inclinaison.
  2. Foret (1) selon la revendication 1, caractérisé en ce que la première inclinaison est inférieure à 5 degrés.
  3. Foret (1) selon la revendication 1 ou 2, caractérisé en ce que la deuxième inclinaison est comprise entre 15 degrés et 30 degrés.
  4. Foret (1) selon l'une des revendications précédentes, caractérisé en ce que la deuxième portion (33) du conduit d'aspiration (30) est incurvée de bout en bout.
  5. Foret (1) selon l'une des revendications précédentes, caractérisé en ce que la tête de forage (2) comporte une embase (13) dans laquelle les arêtes de coupe (14) sont noyées, l'embase (13) entourant partiellement les arêtes de coupe (14) dans une direction circonférentielle.
  6. Foret (1) selon la revendication 5, caractérisé en ce que l'embase (13) est au moins partiellement en acier fritté.
  7. Foret (1) selon la revendication 6, caractérisé en ce qu'une portion (32) de l'embase (13), entourant les arêtes de coupe (14), est en carbure de tungstène.
  8. Foret (1) selon la revendication 5, caractérisé en ce que l'embase (13) est entièrement en acier fritté.
  9. Foret selon l'une des revendications précédentes, caractérisé en ce que les arêtes de coupe (14) sont en carbure de tungstène fritté.
  10. Foret (1) selon l'une des revendications précédentes, caractérisé en ce que les arêtes de coupe (14) comportent une surface d'attaque (23) et une face de dépouille (24), lesquelles faces font toutes les deux parties de la face de frappe (7) et sont en contact l'une avec l'autre le long d'un bord de burinage (22).
EP18731458.8A 2017-06-27 2018-06-19 Foret pour le burinage de roche Active EP3645229B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP17178102.4A EP3421205A1 (fr) 2017-06-27 2017-06-27 Foret pour le burinage de roche
PCT/EP2018/066259 WO2019002025A1 (fr) 2017-06-27 2018-06-19 Foret pour le trépanage de roche

Publications (2)

Publication Number Publication Date
EP3645229A1 EP3645229A1 (fr) 2020-05-06
EP3645229B1 true EP3645229B1 (fr) 2021-07-28

Family

ID=59239847

Family Applications (2)

Application Number Title Priority Date Filing Date
EP17178102.4A Withdrawn EP3421205A1 (fr) 2017-06-27 2017-06-27 Foret pour le burinage de roche
EP18731458.8A Active EP3645229B1 (fr) 2017-06-27 2018-06-19 Foret pour le burinage de roche

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP17178102.4A Withdrawn EP3421205A1 (fr) 2017-06-27 2017-06-27 Foret pour le burinage de roche

Country Status (5)

Country Link
US (1) US11850716B2 (fr)
EP (2) EP3421205A1 (fr)
JP (1) JP6925456B2 (fr)
CN (1) CN110799316B (fr)
WO (1) WO2019002025A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20200156163A1 (en) * 2017-06-27 2020-05-21 Hilti Aktiengesellschaft Drill for Chiseling Stone

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111113554A (zh) * 2020-01-03 2020-05-08 西南石油大学 一种用于碳纤维复合材料制孔的吸气式钻头
KR102397373B1 (ko) * 2021-11-01 2022-05-13 서울화스닝(주) 천정 앵커볼트 시공과 전산볼트 설치용 치공구 세트 및 이를 이용한 전산볼트 시공방법

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20200156163A1 (en) * 2017-06-27 2020-05-21 Hilti Aktiengesellschaft Drill for Chiseling Stone
US11691204B2 (en) * 2017-06-27 2023-07-04 Hilti Aktlengesellschaft Drill for chiseling stone

Also Published As

Publication number Publication date
CN110799316B (zh) 2021-12-21
WO2019002025A1 (fr) 2019-01-03
CN110799316A (zh) 2020-02-14
US11850716B2 (en) 2023-12-26
US20200215674A1 (en) 2020-07-09
JP2020525678A (ja) 2020-08-27
EP3645229A1 (fr) 2020-05-06
EP3421205A1 (fr) 2019-01-02
JP6925456B2 (ja) 2021-08-25

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