EP0477253B1 - Fleuret creux - Google Patents

Fleuret creux Download PDF

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Publication number
EP0477253B1
EP0477253B1 EP90909564A EP90909564A EP0477253B1 EP 0477253 B1 EP0477253 B1 EP 0477253B1 EP 90909564 A EP90909564 A EP 90909564A EP 90909564 A EP90909564 A EP 90909564A EP 0477253 B1 EP0477253 B1 EP 0477253B1
Authority
EP
European Patent Office
Prior art keywords
ring
hollow drill
steel ring
cutting
drill according
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
EP90909564A
Other languages
German (de)
English (en)
Other versions
EP0477253A1 (fr
EP0477253A4 (fr
Inventor
Peter Hausberger
Franz Egger
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.)
Tyrolit-Schleifmittelwerke Swarovski KG
Original Assignee
Tyrolit-Schleifmittelwerke Swarovski KG
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 Tyrolit-Schleifmittelwerke Swarovski KG filed Critical Tyrolit-Schleifmittelwerke Swarovski KG
Publication of EP0477253A1 publication Critical patent/EP0477253A1/fr
Publication of EP0477253A4 publication Critical patent/EP0477253A4/fr
Application granted granted Critical
Publication of EP0477253B1 publication Critical patent/EP0477253B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B24—GRINDING; POLISHING
    • B24D—TOOLS FOR GRINDING, BUFFING OR SHARPENING
    • B24D7/00—Bonded abrasive wheels, or wheels with inserted abrasive blocks, designed for acting otherwise than only by their periphery, e.g. by the front face; Bushings or mountings therefor
    • B24D7/18—Wheels of special form

Definitions

  • the invention relates to a hollow drill with a carrier tube, which is provided with abrasive parts, which preferably have diamond as an abrasive grain and a metallic binder, wherein guide elements made of hard metal are provided for the lateral guidance of the hollow drill (see, for example, DE-C-2031094 ).
  • Hollow drills are widely used in construction. Openings in walls or floors that were previously obtained by chiseling are now drilled with such hollow drills. Examples of this are openings for sockets and switches, but also through-holes for laying installation pipes and cables as well as ventilation ducts. Furthermore, larger breakthroughs can be created by means of holes arranged side by side.
  • Drills with a smaller diameter are generally provided with a continuous cutting ring, while hollow drills with a larger diameter have cutting segments describing a cutting ring on their circumference.
  • the hollow drill works an annular cut in the material to be processed (brick, concrete, etc.), whereby, in contrast to previous methods, a so-called drill core is cut out of the material to be processed.
  • the cutting ring or the cutting segments slide during drilling with their outer jacket along the wall of the borehole, which is intended to guide the hollow drill.
  • this guidance is only given with new hollow drills. So it can happen that the holes made with a hollow drill have different diameters or that the drills in the wall or the ceiling are not exactly straight. Especially with long drilling distances, the hollow drills tend to run sideways because the cutting ability of the Hollow drill can be different.
  • the object of the invention is to provide a hollow drill of the type mentioned at the outset which ensures good calibration accuracy of the boreholes to be produced. This means that the drill holes drilled with the hollow drill should have exactly the same diameter even after the tool has been in use for a long time, and they should also run straight in the case of deep drill holes.
  • the abrasive parts form a cutting ring located in front of the carrier tube, and in that a steel ring designed as a calibration ring is arranged between the carrier tube and the cutting ring and has the same outside diameter as at least part of its height and part of its circumference Has cutting ring.
  • the steel ring is harder or more wear-resistant than the sintered cutting ring and therefore protects it on the outside. This leads to better running accuracy.
  • the steel ring consists of hardenable steel or a high-strength alloy, and that the steel ring is soldered or welded onto the carrier tube. This embodiment ensures that the hardenable steel ring hardens when soldered or welded onto the carrier tube.
  • Another method of making the steel ring even harder and more wear-resistant is to provide the steel ring on the outer casing with a layer of abrasive grain, which is preferably electroplated.
  • the abrasive grain in most cases diamond grain, is finer than the grain in the actual cutting ring or in the cutting segments, but is advantageously applied in a higher concentration.
  • Another embodiment of the invention provides that hard metal plates or the like are inserted into the steel ring on the outer diameter.
  • An advantageous embodiment of the invention provides that the cutting ring or the cutting segments are or are sintered onto the steel ring.
  • the steel ring on the outer casing is provided with a plurality of guide webs running in the axial direction or that the steel ring on the outer casing is provided with at least one helically running guide web.
  • the long guide bars prevent the drill from running sideways.
  • Another embodiment of the invention provides that the steel ring has openings that allow the flow of cooling water.
  • FIG. 1 shows a schematic diagram of a hollow drill according to the invention with cutting segments
  • Fig. 2 shows a schematic diagram of a hollow drill according to the invention with a cutting ring
  • Fig. 3 shows an axial section through a hollow drill according to the invention
  • Fig. 4 shows a plan view a steel ring according to the invention
  • FIGS. 5 and 6 show diagrams of two further exemplary embodiments of a hollow drill according to the invention.
  • the hollow drill according to the invention consists of a carrier tube 1, a steel ring 2 and cutting segments 3 or a cutting ring 4.
  • the cutting segments 3 and the cutting ring 4 are sintered, with diamond generally being used as the abrasive grain and cobalt as the binder, which is introduced into the abrasive mixture in powder form.
  • the cutting ring 4 is provided with cooling slots 5, which allow the unhindered passage of cooling liquid from the inside of the hollow drill to the outside.
  • the cutting segments 3 or the slip ring 4 are sintered onto the steel ring 2.
  • the steel ring 2 as can be seen in particular from FIG. 3, is designed as a calibration ring and has a jacket section 6 with the same diameter as the slip ring 4 or the cutting ring formed by the cutting segments 3.
  • the diameter of the jacket 6 of the steel ring 2 and the slip ring 4 is a dimension 2a larger than the diameter DR of the carrier tube. On the one hand, this prevents the carrier tube 1 from grinding against the rock wall, while at the same time ensuring good guidance for the hollow drill.
  • the abrasion resistance of the steel ring 2 can, as already mentioned, be improved in various ways.
  • the steel ring 2 can be provided on its jacket section 6 with an electroplated layer 7 made of fine abrasive grain.
  • Another possibility to reduce the abrasion of the steel ring 2 and therefore to extend the service life of the tool is to use hard metal plates and / or diamonds distributed over the circumference on the jacket 6 of the steel ring, in the latter case the diamonds being larger than the diamonds in the Grinding layer of the cutting ring 4 or the cutting segments 3 can be selected.
  • the steel ring 2 is designed to be relatively long in relation to the diameter, as a result of which the guidance during drilling in deep boreholes is improved.
  • the steel ring 2 has axially extending guide webs 8, these guide webs determining the outer diameter of the steel ring 2, which in turn is the same as the outer diameter DS of the cutting ring 4.
  • the steel ring 2 is provided with a helical guide web 9.
  • the cutting ring 4 has oblique cooling slots 5, the inclination ⁇ of the cooling slots 5 corresponding to the slope of the helical guide web 9.
  • the steel ring 2 does not hinder the flow of the cooling liquid, it can, as shown in FIG. 4, be provided with openings 10 which allow the flow of the cooling liquid.
  • a seamless precision steel tube is generally used as the carrier tube.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Drilling Tools (AREA)
  • Polishing Bodies And Polishing Tools (AREA)
  • Pharmaceuticals Containing Other Organic And Inorganic Compounds (AREA)
  • Drilling And Boring (AREA)
  • Dowels (AREA)

Claims (12)

  1. Mèche creuse comprenant un tube de support (1) qui comporte des parties abrasives (3) qui comprennent de préférence un grain abrasif constitué de diamant et un liant métallique, des éléments de guidage en métal dur étant prévus pour le guidage latéral de la mèche creuse, caractérisée en ce que les parties abrasives forment un anneau de coupe (4) se trouvant devant le tube de support (1) et en ce qu'une bague d'acier (2) conformée en bague de calibrage est disposée entre le tube de support (1) et l'anneau de coupe (4), cette bague d'acier ayant sur au moins une partie de sa hauteur et une partie de sa circonférence le même diamètre extérieur que l'anneau de coupe (4).
  2. Mèche creuse selon la revendication 1, caractérisée en ce que la bague d'acier (2) est en acier trempé ou en un alliage à grande résistance.
  3. Mèche creuse selon la revendication 2, caractérisée en ce que la bague d'acier (2) est soudée sur le tube de support (1).
  4. Mèche creuse selon la revendication 1 et/ou 2, caractérisée en ce que l'anneau de coupe (4) ou les segments de coupe (3) est ou sont rapporté(s) par frittage sur la bague d'acier (2).
  5. Mèche creuse selon au moins l'une des revendications 1 à 4, caractérisée en ce que des plaquettes de métal dur ou analogues sont montées sur le diamètre extérieur dans la bague d'acier (2).
  6. Mèche creuse selon la revendication 1, caractérisée en ce que la bague d'acier (2) comporte à la circonférence une couche (7) de protection contre l'usure.
  7. Mèche creuse selon la revendication 6, caractérisée en ce que la couche (7) de protection contre l'usure est formée d'un grain abrasif déposé par électrolyse, de préférence de diamant.
  8. Mèche creuse selon la revendication 1, caractérisée en ce que le grain abrasif déposé sur la bague d'acier (2) est plus petit que le grain abrasif de l'anneau de coupe (4) ou des segments de coupe (3), mais la couche (7) de la bague d'acier (2) a une concentration en grain abrasif supérieure à celle de l'anneau de coupe (4) ou des segments de coupe (3).
  9. Mèche creuse selon l'une au moins des revendications 1 à 8, caractérisée en ce que la bague d'acier (2) comporte des passages (10) permettant la circulation d'eau de refroidissement.
  10. Mèche creuse selon l'une au moins des revendications 1 à 9, caractérisée en ce que la bague d'acier (2) comporte sur l'enveloppe extérieure plusieurs nervures de guidage (8) orientées en direction axiale et ayant le même diamètre que l'anneau de coupe (4).
  11. Mèche creuse selon au moins l'une des revendications 1 à 10, caractérisée en ce que la bague d'acier (2) comporte sur l'enveloppe extérieure au moins une nervure en hélice de guidage (9).
  12. Mèche creuse selon la revendication 11, caractérisée en ce que l'anneau de coupe (4) comporte une fente oblique de refroidissement (5) dont l'inclinaison (α) est adaptée au pas de la nervure de guidage (9).
EP90909564A 1989-06-14 1990-06-13 Fleuret creux Expired - Lifetime EP0477253B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT1450/89 1989-06-14
AT145089 1989-06-14

Publications (3)

Publication Number Publication Date
EP0477253A1 EP0477253A1 (fr) 1992-04-01
EP0477253A4 EP0477253A4 (fr) 1992-07-29
EP0477253B1 true EP0477253B1 (fr) 1993-08-11

Family

ID=3514158

Family Applications (1)

Application Number Title Priority Date Filing Date
EP90909564A Expired - Lifetime EP0477253B1 (fr) 1989-06-14 1990-06-13 Fleuret creux

Country Status (4)

Country Link
EP (1) EP0477253B1 (fr)
AT (1) ATE92815T1 (fr)
FI (1) FI915434A0 (fr)
WO (1) WO1990015683A1 (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2745964A1 (fr) * 2012-12-21 2014-06-25 HILTI Aktiengesellschaft Section de coupe
EP2745965A1 (fr) * 2012-12-21 2014-06-25 HILTI Aktiengesellschaft Trépan doté d'une section de coupe interchangeable
EP2745966A1 (fr) * 2012-12-21 2014-06-25 HILTI Aktiengesellschaft Trépan doté d'une section de coupe interchangeable
EP4667144A1 (fr) 2024-06-18 2025-12-24 Hilti Aktiengesellschaft Insert d'outil pour carottage à guidage amélioré

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1992012837A1 (fr) * 1991-01-15 1992-08-06 Tyrolit Schleifmittelwerke Swarovski K.G. Meche creuse
DE19648868A1 (de) * 1996-11-26 1998-05-28 Hilti Ag Bohrwerkzeug mit hohlzylinderförmigem Trägerkörper
AT5265U1 (de) * 2001-07-27 2002-05-27 Schraml Glastechnik Gmbh Diamant-hohlbohrer
IL160074A (en) * 2004-01-26 2009-07-20 Redent Nova Ltd Self adjusting instrument
DE102011089546A1 (de) * 2011-12-22 2013-06-27 Hilti Aktiengesellschaft Bohrkrone mit einem austauschbaren Bohrkronenabschnitt
WO2014015154A1 (fr) 2012-07-18 2014-01-23 Milwaukee Electric Tool Corporation Scie cylindrique
CN103660044B (zh) * 2013-12-03 2015-11-18 常州深倍超硬材料有限公司 具有冷却结构的组合刀具
CN216028284U (zh) 2018-07-10 2022-03-15 米沃奇电动工具公司 孔锯
EP3986650A4 (fr) 2019-06-20 2023-07-19 Milwaukee Electric Tool Corporation Scie-cloche dotée de trous à parois latérales circulaires
USD958855S1 (en) 2019-12-09 2022-07-26 Milwaukee Electric Tool Corporation Hole saw
JP7412042B2 (ja) * 2019-12-24 2024-01-12 桂林創源金剛石有限公司 高速且つ高効率のドリルビット

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2996061A (en) * 1959-01-26 1961-08-15 Super Cut Abrasive diamond core drill
CH585339A5 (fr) * 1973-02-09 1977-02-28 Hawera Probst Kg Hartmetall
DE2311258A1 (de) * 1973-03-07 1974-09-12 Winter & Sohn Ernst Bohrwerkzeug mit einer zylinderfoermigen bohrkrone
GB2052325A (en) * 1979-07-03 1981-01-28 Stark T Multi-cutter drilling bit tool
AT360734B (de) * 1979-08-17 1981-01-26 Swarovski Tyrolit Schleif Hohlbohrer
JPS59143616U (ja) * 1983-03-14 1984-09-26 萬デザイン株式会社 環状カツタ−
DE3706641A1 (de) * 1987-03-02 1988-09-15 Hilti Ag Hohlbohrer
DE3901528A1 (de) * 1989-01-20 1990-07-26 Hilti Ag Hohlbohrwerkzeug

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2745964A1 (fr) * 2012-12-21 2014-06-25 HILTI Aktiengesellschaft Section de coupe
EP2745965A1 (fr) * 2012-12-21 2014-06-25 HILTI Aktiengesellschaft Trépan doté d'une section de coupe interchangeable
EP2745966A1 (fr) * 2012-12-21 2014-06-25 HILTI Aktiengesellschaft Trépan doté d'une section de coupe interchangeable
WO2014096360A1 (fr) * 2012-12-21 2014-06-26 Hilti Aktiengesellschaft Couronne de forage pourvue d'un segment de coupe interchangeable
WO2014096366A1 (fr) * 2012-12-21 2014-06-26 Hilti Aktiengesellschaft Couronne de forage pourvue d'un segment de coupe interchangeable
WO2014096359A1 (fr) * 2012-12-21 2014-06-26 Hilti Aktiengesellschaft Segment de coupe pour une couronne de forage
CN104955598A (zh) * 2012-12-21 2015-09-30 喜利得股份公司 具有可更换的切削区段的钻头
CN104955597A (zh) * 2012-12-21 2015-09-30 喜利得股份公司 用于钻头的切削区段
CN104981311A (zh) * 2012-12-21 2015-10-14 喜利得股份公司 带有可更换的切削段的冠状钻头
CN104981311B (zh) * 2012-12-21 2018-09-04 喜利得股份公司 带有可更换的切削段的冠状钻头
US10081062B2 (en) 2012-12-21 2018-09-25 Hilti Aktiengesellschaft Cutting portion for a drill bit
CN104955598B (zh) * 2012-12-21 2018-12-21 喜利得股份公司 具有可更换的切削区段的钻头
US10201858B2 (en) 2012-12-21 2019-02-12 Hilti Aktiengesellschaft Drill bit with an exchangeable cutting portion
CN104955597B (zh) * 2012-12-21 2020-04-21 喜利得股份公司 用于钻头的切削区段
US10717137B2 (en) 2012-12-21 2020-07-21 Hilti Aktiengesellschaft Drill bit with an exchangeable cutting portion
EP4667144A1 (fr) 2024-06-18 2025-12-24 Hilti Aktiengesellschaft Insert d'outil pour carottage à guidage amélioré
WO2025261797A1 (fr) 2024-06-18 2025-12-26 Hilti Aktiengesellschaft Insert d'outil pour carottage à guidage amélioré

Also Published As

Publication number Publication date
EP0477253A1 (fr) 1992-04-01
EP0477253A4 (fr) 1992-07-29
ATE92815T1 (de) 1993-08-15
FI915434A7 (fi) 1991-11-18
FI915434A0 (fi) 1991-11-18
WO1990015683A1 (fr) 1990-12-27

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