EP0706870B1 - Scie tubulaire - Google Patents

Scie tubulaire Download PDF

Info

Publication number
EP0706870B1
EP0706870B1 EP95810465A EP95810465A EP0706870B1 EP 0706870 B1 EP0706870 B1 EP 0706870B1 EP 95810465 A EP95810465 A EP 95810465A EP 95810465 A EP95810465 A EP 95810465A EP 0706870 B1 EP0706870 B1 EP 0706870B1
Authority
EP
European Patent Office
Prior art keywords
carrier body
cross
cutouts
wall thickness
auger
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
Application number
EP95810465A
Other languages
German (de)
English (en)
Other versions
EP0706870A1 (fr
Inventor
Werner Kleine
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 EP0706870A1 publication Critical patent/EP0706870A1/fr
Application granted granted Critical
Publication of EP0706870B1 publication Critical patent/EP0706870B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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
    • B28D1/14—Working stone or stone-like materials, e.g. brick, concrete or glass, not provided for elsewhere; Machines, devices, tools therefor by boring or drilling
    • 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
    • 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
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S408/00—Cutting by use of rotating axially moving tool
    • Y10S408/703—Trepanning
    • 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
    • Y10T408/895—Having axial, core-receiving central portion

Definitions

  • the invention relates to a hollow drill bit with a hollow cylindrical carrier body, the end region on the drilling direction side having open recesses in the drilling direction, which serve to accommodate cutting bodies which project axially beyond the carrier body and on its inner and outer contours.
  • Hollow drill bits are used to produce large holes in components, such holes mostly being used to pass lines and the like.
  • Masonry, concrete, stone and the like come into consideration as material for the components.
  • the construction of the hollow drill bits is largely known per se and generally consists of a hollow cylindrical carrier body, the end region of which on the drilling direction side has open cutouts.
  • cutting bodies are arranged which serve to actually break down the material of the components to be machined.
  • the cutting bodies can consist of hard metal, polycrystalline diamond flakes, diamond cutting edges consisting of diamond grains which are embedded in matrix material and the like.
  • the connection between the cutting body and the carrier body can be made by soldering, welding or sintering connections.
  • these known hollow drill bits Due to the difference between the wall thickness of the carrier body and the dimension of the cutting body measured in the radial direction, these known hollow drill bits are only a relatively small connection area is available, which can be used for a soldered connection, for example. Since the hollow core bits are exposed to considerable stresses due to the torques which occur and any impact forces acting on them, the cutting bodies can become detached from the carrier body, so that the hollow core bit as a whole is unusable.
  • the entire end region of the carrier body on the drilling direction side is provided with a larger wall thickness all round, this larger wall thickness corresponding to the radially measured dimension of the cutting body.
  • the disadvantage of detaching the cutting bodies can thereby largely be remedied, but with the purchase of a further very significant disadvantage, namely the increase in the friction of the carrier body within the bore to be produced due to the circumferential end region with greater wall thickness.
  • a further hollow drill bit is known from US Pat. No. 3,308,689, in which the outer contour of the carrier body widens radially outward in the end region on the drilling direction side, so that the carrier body has an overall greater wall thickness at its free end on the drilling direction side.
  • This free end area on the drilling direction side is provided with a plurality of cut-outs for receiving a cutting body and a plurality of discharge grooves.
  • These removal grooves extend in the drilling direction over the entire extended, drilling direction end region of the carrier body and each open into one of the cutouts.
  • the base areas of these discharge grooves extend tangentially to the non-expanded outer contour of the carrier body. Since the extent of the cutouts in the circumferential direction of the carrier body is greater than the extent of the cutting bodies, only a part of each cutout is available as a connecting surface.
  • the invention has for its object to provide a hollow core bit, which on the one hand leads to high efficiency and on the other hand has a high life expectancy.
  • the object is achieved in that the carrier body of the hollow drill bit has cross-sectional reinforcements which are limited to the surrounding area of the recesses and which adjoin the recesses in the circumferential direction of the carrier body on both sides and counter to the drilling direction.
  • the cross-sectional reinforcements of the carrier body limited according to the invention to the surrounding area of the cutouts lead to such an enlargement of the connecting area that the cutting bodies are sufficiently held in the cutouts even under high loads.
  • Common, known measures such as soldering, welding or sintering connections are sufficient for the connection.
  • the partial cross-sectional reinforcements do not significantly increase the friction between the carrier body and the bore to be produced in the component, especially not in such a way that excessive heat is generated occurs. Because the cross-sectional reinforcements do not extend over the entire circumference of the carrier body, there is still sufficient space for the removal of the dismantled material. This also eliminates the risk of compression of the mined material, which can lead to a drop in performance.
  • the cross-sectional reinforcements can only project beyond the wall thickness of the support body, for example, only on the outer contour; this from the point of view that the greatest friction occurs on the outer contour and material that has largely been removed must also be removed on the outer contour.
  • the carrier body in such a way that the cross-sectional reinforcements project beyond the wall thickness only on the inner contour.
  • This application is suitable, for example, for hollow core bits, which are primarily used to produce shorter holes.
  • an optimal compromise can be to have both the inner contour and the outer contour of the carrier body protrude from the cross-sectional reinforcements.
  • the wall thickness of the carrier body in the area of the cross-sectional reinforcements expediently corresponds to 1.2 to 1.8 times the remaining wall thickness of the carrier body.
  • the cross-sectional reinforcements can be adapted to the respective application and the diameter ratio under consideration.
  • the distribution in the circumferential direction of the cross-sectional reinforcements is expediently symmetrical, based on the cutouts.
  • the dimension of the cross-sectional reinforcements measured in the axial direction is also advantageously matched to the respective applications.
  • the cross-sectional reinforcements expediently then extend at the base of the recesses counter to the drilling direction by an amount which corresponds to 0.5 to 1.4 times the width of the recesses measured in the circumferential direction of the carrier body
  • the carrier body 1 shows a hollow core bit according to the invention with carrier body 1 and cutting bodies 2. Contrary to the direction of drilling, the carrier body 1 is provided with a bottom 1a, which is penetrated by a threaded bore 1b, so that an adapter can be accommodated therein.
  • the cutting bodies 2 are arranged in recesses 1c of the carrier body 1.
  • the carrier body 1 has cross-sectional reinforcements 1d in the vicinity of these cutouts 1c.
  • the cross-sectional reinforcements 1d project beyond the wall thickness T of the carrier body 1 by way of example both on the inner and on the outer contour.
  • the wall thickness Q in the area of the cross-sectional reinforcements 1d is thus greater than the remaining wall thickness T of the carrier body 1, the wall thickness Q in the area of the cross-sectional reinforcements 1d corresponding substantially less to approximately the same as the radially measured dimension of the cutting bodies 2.
  • the cross-sectional reinforcements 1d in the circumferential direction of the carrier body 1 adjoin the cutouts 1c on both sides, namely by the dimension U measured in the circumferential direction of the carrier body 1.
  • This dimension U corresponds to a Proportion of the width B of the cutouts 1c measured in the circumferential direction.
  • the cross-sectional reinforcements 1d extend counter to the direction of drilling beyond the base of the recesses 1c, namely by the dimension G, as again shown in FIG. 1 and in particular in FIG. 2.
  • the carrier body 1 can be produced in various ways. However, non-cutting shaping is preferably used. There are also various possibilities for the connection between the carrier body 1 and the cutting body 2. However, a soldered connection is preferably used.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mining & Mineral Resources (AREA)
  • Mechanical Engineering (AREA)
  • Drilling Tools (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Earth Drilling (AREA)
  • Materials For Medical Uses (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)
  • Dental Tools And Instruments Or Auxiliary Dental Instruments (AREA)
  • Measurement Of The Respiration, Hearing Ability, Form, And Blood Characteristics Of Living Organisms (AREA)
  • Finger-Pressure Massage (AREA)

Claims (6)

  1. Couronne de forage creuse comportant un corps de support (1) cylindrique creux dont la zone terminale côté sens de forage présente des découpes (1c) ouvertes dans le sens du forage et qui servent à recevoir des corps de coupe (2), lesquels dépassent du corps de support (1) axialement ainsi que sur son contour intérieur et extérieur, caractérisée en ce que le corps de support (1) présente des accroissements de section (1d) limités sur la zone entourant les découpes (1c) et qui se raccordent aux découpes (1c), dans la direction périphérique du corps de support (1), des deux côtés et dans le sens opposé au sens de forage.
  2. Couronne de forage creuse selon la revendication 1, caractérisée en ce que les accroissements de section (1d) dépassent de l'épaisseur de paroi (T) du corps de support (1) sur le contour extérieur.
  3. Couronne de forage creuse selon la revendication 1 ou 2, caractérisée en ce que les accroissements de section (1d) dépassent de l'épaisseur de paroi (T) du corps de support (1) sur le contour intérieur.
  4. Couronne de forage creuse selon l'une des revendications 1 à 3, caractérisée en ce que l'épaisseur de paroi (Q) du corps de support (1) dans la zone des accroissements de section (1d) correspond à 1,2 à 1,8 fois l'épaisseur de paroi (T) restante du corps de support (1).
  5. Couronne de forage creuse selon l'une des revendications 1 à 4, caractérisé en ce que la cote (U) des accroissements de section (1d), mesurée dans la direction périphérique du corps de support (1), correspond, des deux côtés des découpes (1c), à 0,3 à 1 fois la largeur (B) des découpes (1c), mesurée dans la direction périphérique du corps de support (1).
  6. Couronne de forage creuse selon l'une des revendications 1 à 5, caractérisée en ce que les accroissements de section (1d) s'étendent, à la suite du fond des évidements (1c), dans le sens opposé au sens de forage, sur une cote (G) qui correspond à 0,5 à 1,4 fois la largeur (B) des découpes (1c) mesurée dans la direction périphérique du corps de support (1).
EP95810465A 1994-10-15 1995-07-14 Scie tubulaire Expired - Lifetime EP0706870B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4436915A DE4436915A1 (de) 1994-10-15 1994-10-15 Hohlbohrkrone mit einem hohlzylindrischen Trägerkörper
DE4436915 1994-10-15

Publications (2)

Publication Number Publication Date
EP0706870A1 EP0706870A1 (fr) 1996-04-17
EP0706870B1 true EP0706870B1 (fr) 2001-09-19

Family

ID=6530874

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95810465A Expired - Lifetime EP0706870B1 (fr) 1994-10-15 1995-07-14 Scie tubulaire

Country Status (11)

Country Link
US (1) US5569002A (fr)
EP (1) EP0706870B1 (fr)
JP (1) JPH08197533A (fr)
KR (1) KR100351536B1 (fr)
CN (1) CN1081116C (fr)
AT (1) ATE205769T1 (fr)
CA (1) CA2160044C (fr)
DE (2) DE4436915A1 (fr)
DK (1) DK0706870T3 (fr)
FI (1) FI105537B (fr)
HU (1) HU216525B (fr)

Families Citing this family (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19826919A1 (de) * 1998-06-17 1999-12-23 Hilti Ag Werkzeug zur Bearbeitung von harten Untergründen
BE1013336A3 (nl) * 2000-03-01 2001-12-04 Diamant Boart Nv Buisvormige boor.
US6637101B2 (en) 2001-06-22 2003-10-28 Radio Frequency Systems, Inc. Coaxial cable preparation tool
US6786684B1 (en) 2001-08-15 2004-09-07 Robert J. Ecker Tubular hole cutter
TWI263552B (en) * 2003-06-05 2006-10-11 Miyanaga Kk Core cutter
CA2559991A1 (fr) * 2005-12-20 2007-06-20 Andy Locke Outil de coupe rotatif pour coupe discontinue de metal
JP5318338B2 (ja) * 2006-08-10 2013-10-16 マックス株式会社 ノンコアドリルビット
DE102007018791B3 (de) * 2007-04-20 2008-08-14 Atlas Diamant Werkzeuge Gmbh Segmentband für eine Bohrkrone und Bohrkrone
US20080296069A1 (en) * 2007-05-30 2008-12-04 Nikola Ljubic Novel core drill bit housing and core drill bit
US20140017021A1 (en) * 2012-07-12 2014-01-16 General Electric Company Apparatus for removing retainer material
CN105410098B (zh) * 2015-09-02 2018-07-31 九阳股份有限公司 一种便于制作筋道面条的面条机
CN114728349B (zh) 2019-11-14 2025-07-08 米沃奇电动工具公司 具有大的硬质合金悬突的孔锯

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1115010A (en) * 1913-12-23 1914-10-27 Frank Schimpfle Device in coring-tools for cutting cylinders.
AT242579B (de) 1962-11-03 1965-09-27 Artur Fischer Verfahren zur Herstellung eines Hartmetallbohrers, insbesondere zum Bohren in hartem Material, wie Beton oder Stein
GB1104798A (en) * 1963-11-22 1968-02-28 English Electric Co Ltd Trepanning tools
US4274769A (en) * 1978-04-21 1981-06-23 Acker Drill Company, Inc. Impregnated diamond drill bit construction
JPS5854921B2 (ja) * 1980-12-10 1983-12-07 株式会社ミヤナガ コアドリル
DE3407427A1 (de) * 1984-02-29 1985-08-29 Hawera Probst Gmbh + Co, 7980 Ravensburg Bohrkrone
DE3408093A1 (de) * 1984-03-05 1985-09-05 Hilti Ag, Schaan Bohrkrone
KR870000798Y1 (ko) * 1985-04-24 1987-03-05 김관기 상수도용 천공기
DE8805449U1 (de) * 1988-04-25 1988-06-09 Maier, Wolfgang, 5630 Remscheid Diamant-Kernbohrer
DE3930250A1 (de) 1989-09-11 1991-03-14 Licentia Gmbh Mit der arbeitsspindel einer handgefuehrten elektrowerkzeugmaschine vereinigbarer aufnahmeschaft

Also Published As

Publication number Publication date
EP0706870A1 (fr) 1996-04-17
HU9502974D0 (en) 1995-12-28
KR100351536B1 (ko) 2002-12-28
FI954849A0 (fi) 1995-10-12
CN1129635A (zh) 1996-08-28
DE4436915A1 (de) 1996-04-18
CN1081116C (zh) 2002-03-20
HU216525B (hu) 1999-07-28
ATE205769T1 (de) 2001-10-15
JPH08197533A (ja) 1996-08-06
FI954849L (fi) 1996-04-16
DE59509611D1 (de) 2001-10-25
FI105537B (fi) 2000-09-15
KR960013598A (ko) 1996-05-22
HUT72770A (en) 1996-05-28
US5569002A (en) 1996-10-29
CA2160044A1 (fr) 1996-04-16
CA2160044C (fr) 1998-12-15
DK0706870T3 (da) 2001-11-26

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