EP0477253A1 - Hohlbohrer. - Google Patents
Hohlbohrer.Info
- Publication number
- EP0477253A1 EP0477253A1 EP90909564A EP90909564A EP0477253A1 EP 0477253 A1 EP0477253 A1 EP 0477253A1 EP 90909564 A EP90909564 A EP 90909564A EP 90909564 A EP90909564 A EP 90909564A EP 0477253 A1 EP0477253 A1 EP 0477253A1
- 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.)
- Granted
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
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D61/00—Tools for sawing machines or sawing devices; Clamping devices for these tools
- B23D61/02—Circular saw blades
- B23D61/025—Details of saw blade body
-
- 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
- Hollow drill The invention relates to a hollow drill with a carrier tube, a cutting ring or segments with preferably diamond as an abrasive grain and a metallic binder, wherein a steel ring is arranged between the cutting ring or the cutting segments and the carrier tube.
- Hollow drills are widely used in construction. 'Openings in walls or floors which were previously obtained by chisel work 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 a cutting ring on their circumferential cutting segments. In both cases, the hollow drill works an annular one
- the cutting ring or the cutting segments slide with their outer jacket along the wall of the borehole during the drilling, which is intended to guide the height of the hole.
- this guidance is only available for new Holhbo rers. So it can happen that the drill holes made with a hollow drill have different diameters or that the drills in the wall or ceiling do not run exactly straight.
- the hollow drills tend to run sideways, particularly with long drilling distances, since 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, which ensures a good Kai ibri erha Iti gke 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 a long period of use of the tool and they should also run straight even in deep drill holes.
- the steel ring is designed as a quartz ring which has the same outer diameter as the cutting ring or the cutting ring defined by the cutting segments over at least part of its height and part of its circumference.
- the steel ring is harder or more wear-resistant than the sintered cutting ring and therefore protects it on the
- the steel ring is made of hardenable steel or a high-strength alloy and that the steel ring is 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 surface with a layer of abrasive grain, which is preferably galvanically applied.
- 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 Ip lätt c or the like are used in 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 webs prevent the drill from running sideways.
- Another exemplary embodiment of the invention provides that the steel ring has openings which 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 one Top view of 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 invention Hohlbo 'stirrer consists of a Crowroh 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 grinding mixture in powder form.
- the Schneid ⁇ ' ng 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 and 4 are of the slip ring on the Stahl ⁇ ng '2mits intert.
- 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. This prevents on the one hand that the carrier tube 1 grinds against the rock wall while at the same time ensuring good guidance for the hollow drill
- the Stahl ⁇ ' may ng 2 on its jacket portion 6 with an electro-deposited layer 7 f- fine Schle be provided Körn.
- Another way to reduce the abrasion of the steel ring 2 and therefore to prolong the service life of the tool is to use hard metal l platelets and / or diamonds on the jacket 6 of the steel ring over the circumference, the diamonds being larger than in the latter case the diamonds in the sight 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 O 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)
Description
Claims
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 true EP0477253A1 (de) | 1992-04-01 |
EP0477253A4 EP0477253A4 (de) | 1992-07-29 |
EP0477253B1 EP0477253B1 (de) | 1993-08-11 |
Family
ID=3514158
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP90909564A Expired - Lifetime EP0477253B1 (de) | 1989-06-14 | 1990-06-13 | Hohlbohrer |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0477253B1 (de) |
AT (1) | ATE92815T1 (de) |
FI (1) | FI915434A0 (de) |
WO (1) | WO1990015683A1 (de) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2630396C2 (ru) * | 2012-12-21 | 2017-09-07 | Хильти Акциенгезельшафт | Сверлильная коронка со сменной режущей частью |
US10201858B2 (en) | 2012-12-21 | 2019-02-12 | Hilti Aktiengesellschaft | Drill bit with an exchangeable cutting portion |
Families Citing this family (11)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1992012837A1 (de) * | 1991-01-15 | 1992-08-06 | Tyrolit Schleifmittelwerke Swarovski K.G. | Hohlbohrer |
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 (en) | 2012-07-18 | 2014-01-23 | Milwaukee Electric Tool Corporation | Hole saw |
EP2745964A1 (de) * | 2012-12-21 | 2014-06-25 | HILTI Aktiengesellschaft | Schneidabschnitt |
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 |
WO2020014340A1 (en) | 2018-07-10 | 2020-01-16 | Milwaukee Electric Tool Corporation | Hole saw with hex sidewall holes |
USD958855S1 (en) | 2019-12-09 | 2022-07-26 | Milwaukee Electric Tool Corporation | Hole saw |
KR102653537B1 (ko) * | 2019-12-24 | 2024-04-02 | 구일린 챔피온 유니온 다이아몬드 컴퍼니 리미티드 | 고속 고효율의 드릴 비트 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2996061A (en) * | 1959-01-26 | 1961-08-15 | Super Cut | Abrasive diamond core drill |
CH585339A5 (de) * | 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 |
-
1990
- 1990-06-13 WO PCT/AT1990/000061 patent/WO1990015683A1/de active IP Right Grant
- 1990-06-13 AT AT90909564T patent/ATE92815T1/de not_active IP Right Cessation
- 1990-06-13 EP EP90909564A patent/EP0477253B1/de not_active Expired - Lifetime
-
1991
- 1991-11-18 FI FI915434A patent/FI915434A0/fi not_active Application Discontinuation
Non-Patent Citations (1)
Title |
---|
See references of WO9015683A1 * |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
RU2630396C2 (ru) * | 2012-12-21 | 2017-09-07 | Хильти Акциенгезельшафт | Сверлильная коронка со сменной режущей частью |
RU2630396C9 (ru) * | 2012-12-21 | 2018-03-06 | Хильти Акциенгезельшафт | Сверлильная коронка со сменной режущей частью |
US10201858B2 (en) | 2012-12-21 | 2019-02-12 | Hilti Aktiengesellschaft | Drill bit with an exchangeable cutting portion |
US10201860B2 (en) | 2012-12-21 | 2019-02-12 | Hilti Aktiengesellschaft | Drill bit with an exchangeable cutting portion |
Also Published As
Publication number | Publication date |
---|---|
FI915434A0 (fi) | 1991-11-18 |
ATE92815T1 (de) | 1993-08-15 |
EP0477253B1 (de) | 1993-08-11 |
WO1990015683A1 (de) | 1990-12-27 |
EP0477253A4 (de) | 1992-07-29 |
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