WO2013053545A1 - Couronne de forage à percussion - Google Patents

Couronne de forage à percussion Download PDF

Info

Publication number
WO2013053545A1
WO2013053545A1 PCT/EP2012/067159 EP2012067159W WO2013053545A1 WO 2013053545 A1 WO2013053545 A1 WO 2013053545A1 EP 2012067159 W EP2012067159 W EP 2012067159W WO 2013053545 A1 WO2013053545 A1 WO 2013053545A1
Authority
WO
WIPO (PCT)
Prior art keywords
tooth
trough
level
hammer
distance
Prior art date
Application number
PCT/EP2012/067159
Other languages
German (de)
English (en)
Inventor
Helmut Duscha
Andreas SCHLACHTER
Rainer Widmann
Original Assignee
Robert Bosch Gmbh
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 Robert Bosch Gmbh filed Critical Robert Bosch Gmbh
Publication of WO2013053545A1 publication Critical patent/WO2013053545A1/fr

Links

Classifications

    • 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
    • B28D1/02—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing
    • B28D1/04—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing with circular or cylindrical saw-blades or saw-discs
    • B28D1/041—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by sawing with circular or cylindrical saw-blades or saw-discs with cylinder saws, e.g. trepanning; saw cylinders, e.g. having their cutting rim equipped with abrasive particles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B51/00—Tools for drilling machines
    • B23B51/04—Drills for trepanning
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2226/00—Materials of tools or workpieces not comprising a metal
    • B23B2226/75—Stone, rock or concrete
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23B—TURNING; BORING
    • B23B2251/00—Details of tools for drilling machines
    • B23B2251/04—Angles, e.g. cutting angles

Definitions

  • the invention relates to a hammer bit for rotationally driven drilling of
  • a hammer drill bit for the rotational impact drilling of rock or concrete which comprises a clamping shaft, a drill sleeve with a Bohrhülsenboden and a Bohrhülsenmantel and a plurality of teeth, wherein the teeth are arranged on an annular end face of Bohrhülsenmantels and wherein each Tooth protrudes in the feed direction over the front side of the Bohrmülsenmantels.
  • Bohrhülsenmantel The Bohrmülsen on the Bohrmülsenmantel by this pressure against a feed direction increasing Bohrmehl is at the outer
  • the core of the invention is thus the targeted creation of flow spaces, which open directly to a Hauptwirkzone the hammer bit, in which in particular the teeth and the face of the Schlagbohrkorne act on the material to be machined, this grind, smash and move.
  • Drilled flour is pushed out from clumping in comparison to conventional hammer drill bits due to excessive machining and can thus be conveyed more easily.
  • the trough to the leading tooth with a distance A greater than zero and to the trailing tooth with a distance a greater than zero or to connect the trough directly to the leading tooth and to the trailing tooth with a distance a greater than zero position or place the trough to the leading tooth with a distance A greater than zero and connect directly to the trailing tooth or connect the trough directly to the leading tooth and connect directly to the trailing tooth. Due to the spaced arrangement of the decompression space to the two adjacent teeth of the trough, a conventional embedding of the teeth is ensured despite the formation of the trough. This can be with respect to the embedding of the teeth in the Production can be resorted to the existing empirical values.
  • the decompression space formed by the trough is arranged directly at the place of origin of the drilling dust and can already unfold its effect there.
  • the invention further provides to form the trough in a rear end region to an embedding of the trailing tooth on average with an angle of at most 30 ° to a longitudinal axis of the hammer drill bit and this particular give a step-shaped or staircase-shaped course and the trough in a front end region to give an embedding of a leading tooth in particular a jump-free course, which runs on average, in particular at an angle of at least 45 ° and in particular at least 60 ° to the longitudinal axis of the hammer drill bit, and a central region of the trough, which between the
  • End regions is to be aligned, in particular at an angle of 90 ° to the longitudinal axis of the hammer drill bit. Due to the gentle transition, a dead space is avoided in the front end region, in which the drilling dust flows in, in which chips are deposited without being further conveyed. Due to its orientation, the rear transition is suitable for counteracting the incoming flow of drilling dust and thus promoting a further flow of the drilling dust between the outer surface of the sleeve wall and the borehole wall.
  • the sloping portion is located in the trough, wherein the portion extends in particular over the entire trough or wherein the portion in particular only in the axial direction and in
  • Circumferentially acting active surfaces of the trough extends or wherein the
  • Section in particular extends only over a circumferentially acting effective surface of the trough. If the section is formed on the effective acting in the circumferential direction effective area of the trough, the additional delivery effect is due to the
  • the invention provides, the hammer bit with a helix
  • the invention provides to arrange the helix spaced from the trough in the axial direction and in particular a measured in the axial direction
  • the invention provides, in addition to the trough on an outer
  • the Bohrhülsenmantel widened in front of the tooth in the radial direction to the feed direction or to a longitudinal axis of the hammer drill bit measured to an outer lateral surface from a first width (b1) to a second width (b2) leaps and bounds.
  • the invention also provides to form the transport surface on the tooth, wherein the tooth projects in the feed direction radially outwardly beyond the outer surface of the Bohrhülsenmantels.
  • a transport surface is particularly inexpensive to produce, since this can be realized by the tooth geometry and a machining of Bohrhülsenmantels is not required.
  • the tooth protrudes radially outward beyond the transport surface viewed in the feed direction.
  • the tooth projects radially inwards in the direction of advance over an inner circumferential surface of the drill sleeve wall. This is when
  • the invention provides to form the transport surface as a flat surface or form the transport surface as a curved surface in particular as a concave or convex curved surface. In this way, the flow of the drilling dust can be influenced according to the requirements and optimized for the respective application.
  • Figure 1 a schematic side view of a first embodiment of a hammer bit with a helix
  • Figure 2, 3 sections through the figure 1 according to the section lines II-II and IIIIII;
  • FIG. 4 shows a side view of a portion of a second embodiment variant of a hammer drill bit shown in unwound form
  • FIG. 5 shows a side view of a portion of a third variant of a hammer drill bit shown in unwound form
  • FIG. 6 a sectional view corresponding to that in FIGS. 4 and 5
  • FIG. 7 shows a side view of a portion of a fourth embodiment variant of a hammer drill bit shown in unwound form
  • FIG. 8 shows a sectional view corresponding to that shown in FIG
  • FIG. 9 shows a side view of a section of a piece shown in unwound form fifth embodiment of a hammer bit
  • FIG. 10 shows a side view of a detail of a sixth embodiment of a hammer drill bit shown in unwound form
  • Figure 1 1 a sectional view corresponding to that shown in FIG
  • FIG. 12 shows a side view of a detail of a seventh embodiment variant of a hammer drill bit shown in unwound form
  • FIGS. 13-16 show a side view of a detail of an eighth, ninth, tenth and eleventh embodiment of a hammer drill bit shown in unwound form.
  • FIG 1 is a schematic side view of an inventive
  • the hammer drill bit 1 comprises a clamping shaft 2, a drill sleeve 3 with a Bohrhülsenboden 4 and a Bohrmülsenmantel 5 and 6 and 6a to 6c.
  • the clamping shaft 2 is connected to the Bohrhülsenboden 4 of the cup-shaped drill sleeve 3.
  • the teeth 6 are on one
  • the hammer bit 1 further comprises a center drill 8 shown cut off, which is arranged in continuation of the clamping shaft 2 on a longitudinal axis L of the hammer bit 1 and connected to the Bohrhülsenteil 4.
  • the hammer bit 1 is rotated in an arrow direction w and a beating or pulse-like feed in an arrow direction x, so that in particular the teeth 6 act on a material to be machined by cutting or peeling and chiselling or shattering.
  • the hammer bit 1 has eight teeth 6.
  • each tooth 6 is a trough 15 or 15 b, 15 c upstream, wherein the tooth 6 a upstream trough to simplify the
  • the troughs 15 each form a decompression space DKR, in which each trailing tooth 6 in the rotationally driven operation of the hammer drill bit 1 processed by a material to be processed, not shown drill presses.
  • drilling dust 46 is produced, which in particular is formed by the rotary movement of the hammer drill bit 1 about the longitudinal axis L from the teeth 6 into the depressions 15. 15c and decompression DKR is pressed and from these in one of
  • Tooth 6 and 6c in the radial direction has a width B6 and the Bohrmülsenmantel 5 in the radial direction has a wall thickness b5. Furthermore, it can be seen that the tooth 6 or 6c to the inner circumferential surface 40 in the radial direction has a projection B40 and the outer circumferential surface 41 in the radial direction has a projection B41. In the area of the helix 48, the wall thickness b5 of the Bohrmülmmantels 5 to
  • FIG. 3 already mentioned above shows a section through the drill sleeve 3 or the drill sleeve jacket 5.
  • the sectional view shows that the drill sleeve jacket 5 has an annular shape
  • Wall 10 forms, at the end face 1 1 (see Figure 1), the teeth 6 are arranged.
  • the positions of the teeth 6 are indicated only schematically in the figure 3 by rectangles, as they are not visible in the sectional view itself.
  • the positions of the wells 15 are indicated by crosses.
  • the teeth 6 are in the axial feed direction x on the annular
  • FIG. 4 shows a side view of a section of a second embodiment of a hammer bit 50 shown in a developed manner. At this
  • Hammer drill bit 50 is a tooth 6, 6a upstream trough 15, 15a is an end face 14 of a Bohrmülsenmantels 5 of the hammer bit 50 executed such that the end face 14 in a portion 7, in which the trough 15, 15a is formed one from an inner circumferential surface 40 of the sleeve shell 5 to an outer
  • Bohrmülsenmantels 5 in the region of the embedding EB increases abruptly from a small width b5 to a large width B5 (see Figure 6). This will be the
  • Transport surface formed TF which from a front side 1 1 at the outer
  • a staple zone HWZ in which the drilling dust is essentially produced is an intermediate conveying zone ZFZ in which the decompression spaces DK are supported by the transport surfaces, and a main conveying zone HFZ in which the filament or simply the outer circumferential surface take over the transport of the drilling dust shown.
  • FIG. 5 shows a side view of a detail of a third embodiment variant of a hammer bit 100 shown in unwound form.
  • FIG. 5 shows a side view of a detail of a third embodiment variant of a hammer bit 100 shown in unwound form.
  • FIG. 7 shows a side view of a portion of a fourth embodiment variant of a hammer bit 150 shown unwound. For this purpose, reference is made in principle to the comments on Figure 4, since the two
  • Embodiment variants are identical except for the formation of the transport surface TF.
  • the transport surface TF is not formed by a special, reinforced embedding EB for the tooth 6, but realized by a web ST, which is formed on the outer jacket surface 41 of the drill sleeve jacket 5.
  • a conveyor rib 48 a of the helix 48 the transport surface TF is not formed by a special, reinforced embedding EB for the tooth 6, but realized by a web ST, which is formed on the outer jacket surface 41 of the drill sleeve jacket 5.
  • FIG. 8 shows a section corresponding to the section line VIII-VIII indicated in FIG. In this sectional view is clearly visible as the web ST is arranged on the outer surface of the Bohrmülsenmantels and opposite to the feed direction x ends below the tooth 6.
  • FIG. 9 shows a side view of a section of a fifth embodiment variant of a hammer bit 200 shown unwound.
  • Embodiment variant are individual cutting elements SE, which also each form a tooth 6, on an end face 1 1 of a Bohrmülsenmantels 5 of
  • the individual cutting element SE has, starting from the tooth 6, a leading foot F1 directed in the direction of rotation w of the hammer drill bit 200 and a trailing foot F2 directed counter to the direction of rotation w.
  • DKR is in each case between a trailing foot F2 of a leading
  • the foot F1 forms a circumferentially or rotational direction w acting on the existing in the trough 15 Bohrmehl effective area WF1.
  • the free and uncovered lying between the cutting elements SE face 1 1 forms an acting in the axial direction or in the feed direction x effective area WF2.
  • FIG. 10 shows a side view of a detail of a sixth embodiment of a hammer drill bit 250 shown in unwound form.
  • a trough 15 is in principle designed according to FIG.
  • An additional existing transport surface TF is different from the
  • the trough 15 has a rear end region 16 which is inclined to a longitudinal axis L at an angle a16
  • FIG. 12 shows, in a schematic and unwound representation, a detail of a further hammer bit 300 in a side view.
  • the hammer drill bit 300 Viewed in the direction of rotation w and against an axial feed direction x, the hammer drill bit 300 has an integer multiple of sections 301 described below towards an end face 1 1, the sections 301 extending from a trailing tooth 6, 6b to a leading tooth 6, 6a and between the teeth 6 is a trough 15. In this case, the hammer bit 300 drops in each section 301 in
  • Direction of rotation w considered from a first level N1, in which a
  • Cutting edge 302 of one of the teeth 6 is, over a distance S1 to a level N2. Thereafter, the hammer bit 300 remains on the line S2
  • the level N5 is higher than the level N2.
  • the leading tooth 6b receives a particularly effective embedding and is better supported when hitting reinforcements.
  • the level N5 align lower than the level N2.
  • FIG. 13 shows a side view of a detail of an eighth embodiment variant of a hammer drill bit 350 shown in unwound form.
  • Hammer drill bit 350 is a distance A, which has a trailing in the direction of rotation w tooth 6, 6b to a trained in a Bohrmülsenmantel 5 against a feed direction x trough 15, smaller than a distance a, which has a leading tooth 6, 6a to the trough 15 ,
  • a> 2 ⁇ A.
  • a depression 15 is to be understood as a recess formed on an end face 11 of the sleeve casing 5, the depth T15 being determined with respect to a level N2 or N5, on which the end face 11 adjacent to the trailing tooth 6b or to the leading tooth 6a.
  • the trough 15 according to the invention has a depth T15 which is suitable for forming a receiving space for drilling dust.
  • FIG. 14 shows a side view of a detail of a ninth embodiment of a hammer drill bit 400 shown in unwound form.
  • this hammer bit 400 is a distance A, which a trailing in the direction of rotation w tooth 6, 6b to a in a Bohrmülsenmantel x against a feed direction x trained well 15 has, equal to zero.
  • a distance A 0 means that the trough 15 leaks directly at the trailing tooth 6b.
  • FIG. 15 shows a side view of a section of a tenth embodiment variant of a hammer drill bit 450 shown in unwound form.
  • FIG. 16 shows a side view of a section of an eleventh embodiment variant of a hammer bit 500 shown unwound.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Earth Drilling (AREA)

Abstract

L'invention concerne une couronne de forage à percussion (1) pour le forage rotatif ou rotopercutant de béton armé ou d'autres matériaux armés ou pierreux, comprenant une tige de serrage (2), un canon de perçage (3) pourvu d'un fond de canon de perçage (4) et d'un corps de canon de perçage (5), ainsi qu'au moins deux dents (6; 6a - 6c), les dents (6; 6a - 6c) étant situées sur une face frontale (11) annulaire libre du corps de canon de perçage (5), et chaque dent (6; 6a, 6b) faisant saillie par rapport à la face frontale (11) du corps de canon de perçage (5) dans le sens d'avance (x). Une cavité (15; 15b, 15c) est ménagée sur la face frontale (11) entre une dent située en avant (6; 6a) dans le sens de rotation (w) et une dent située en arrière (6; 6b) dans le sens de rotation (w), une distance (A) séparant cette cavité de la dent située en avant (6; 6a) et une distance (a) séparant cette cavité de la dent située en arrière (6; 6b).
PCT/EP2012/067159 2011-10-13 2012-09-04 Couronne de forage à percussion WO2013053545A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102011084436.8 2011-10-13
DE102011084436.8A DE102011084436B4 (de) 2011-10-13 2011-10-13 Hammerbohrkrone

Publications (1)

Publication Number Publication Date
WO2013053545A1 true WO2013053545A1 (fr) 2013-04-18

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ID=46796604

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2012/067159 WO2013053545A1 (fr) 2011-10-13 2012-09-04 Couronne de forage à percussion

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DE (1) DE102011084436B4 (fr)
WO (1) WO2013053545A1 (fr)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104847255A (zh) * 2015-06-05 2015-08-19 赵士立 一种基地打桩用钻筒
JP2016132143A (ja) * 2015-01-19 2016-07-25 協正金属實業有限公司 鉄筋コンクリート用ドリルの穴鋸構造の改良

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105345934B (zh) * 2015-09-28 2018-04-03 东阳市天齐知识产权运营有限公司 一种用于岩石开槽的机具齿及其安装方法

Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1176596A (fr) * 1956-06-27 1959-04-13 Sandvikens Jernverks Ab Tête de fleuret de perforation par percussion
JPS5981011A (ja) * 1982-10-27 1984-05-10 Miyanaga:Kk 砥石刃付き回転式コアドリル
DE3407427A1 (de) * 1984-02-29 1985-08-29 Hawera Probst Gmbh + Co, 7980 Ravensburg Bohrkrone
JPH0376608A (ja) * 1989-08-18 1991-04-02 Sanwa Daiyamondo Kogyo Kk 円筒型ホールソー
DE19740277A1 (de) 1997-09-13 1999-03-18 Hawera Probst Gmbh Bohrwerkzeug
EP1319455A1 (fr) * 2001-12-12 2003-06-18 HILTI Aktiengesellschaft Trépan de forage pour la pierre
EP1543907A1 (fr) * 2003-12-15 2005-06-22 HILTI Aktiengesellschaft Outil rotatif pour usinage par enlèvement de copeaux avec corps de support et plusieurs inserts de coupe
EP1637262A1 (fr) * 2003-06-05 2006-03-22 Kabushiki Kaisha Miyanaga Carotteuse
US20090283326A1 (en) * 2008-05-13 2009-11-19 Longyear Tm, Inc. Sonic drill bit for core sampling
EP2335851A1 (fr) * 2008-10-15 2011-06-22 Kabushiki Kaisha Miyanaga Foret-aléseur

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CH185076A (de) * 1935-05-04 1936-07-15 Sauer Carl Kernbohrer für Mauerwerk.
DE9212980U1 (fr) * 1992-09-29 1992-12-10 Ledermann Gmbh, 7240 Horb, De
DE4242465A1 (de) * 1992-12-16 1994-06-23 Hilti Ag Hohlbohrkrone mit stirnseitigen Schneiden
DE19650480A1 (de) * 1996-12-05 1998-06-10 Ofra Struhalla Diamant-Werkzeug
DE20201300U1 (de) * 2002-01-28 2003-07-03 Heller Dinklage Gmbh Geb Bohrkrone
DE102005060523A1 (de) * 2005-12-09 2007-06-14 Adolf Würth GmbH & Co. KG Bearbeitungswerkzeug
DE102007055774A1 (de) * 2007-12-12 2009-06-25 Hilti Aktiengesellschaft Kernbohrkrone für Gestein

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1176596A (fr) * 1956-06-27 1959-04-13 Sandvikens Jernverks Ab Tête de fleuret de perforation par percussion
JPS5981011A (ja) * 1982-10-27 1984-05-10 Miyanaga:Kk 砥石刃付き回転式コアドリル
DE3407427A1 (de) * 1984-02-29 1985-08-29 Hawera Probst Gmbh + Co, 7980 Ravensburg Bohrkrone
JPH0376608A (ja) * 1989-08-18 1991-04-02 Sanwa Daiyamondo Kogyo Kk 円筒型ホールソー
DE19740277A1 (de) 1997-09-13 1999-03-18 Hawera Probst Gmbh Bohrwerkzeug
EP1319455A1 (fr) * 2001-12-12 2003-06-18 HILTI Aktiengesellschaft Trépan de forage pour la pierre
EP1637262A1 (fr) * 2003-06-05 2006-03-22 Kabushiki Kaisha Miyanaga Carotteuse
EP1543907A1 (fr) * 2003-12-15 2005-06-22 HILTI Aktiengesellschaft Outil rotatif pour usinage par enlèvement de copeaux avec corps de support et plusieurs inserts de coupe
US20090283326A1 (en) * 2008-05-13 2009-11-19 Longyear Tm, Inc. Sonic drill bit for core sampling
EP2335851A1 (fr) * 2008-10-15 2011-06-22 Kabushiki Kaisha Miyanaga Foret-aléseur

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2016132143A (ja) * 2015-01-19 2016-07-25 協正金属實業有限公司 鉄筋コンクリート用ドリルの穴鋸構造の改良
CN104847255A (zh) * 2015-06-05 2015-08-19 赵士立 一种基地打桩用钻筒

Also Published As

Publication number Publication date
DE102011084436A1 (de) 2013-04-18
DE102011084436B4 (de) 2015-10-01

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