EP0156762A1 - Foret à couronne - Google Patents
Foret à couronne Download PDFInfo
- Publication number
- EP0156762A1 EP0156762A1 EP85810026A EP85810026A EP0156762A1 EP 0156762 A1 EP0156762 A1 EP 0156762A1 EP 85810026 A EP85810026 A EP 85810026A EP 85810026 A EP85810026 A EP 85810026A EP 0156762 A1 EP0156762 A1 EP 0156762A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- drilling
- hollow drill
- support segments
- segments
- end region
- 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
- 238000005553 drilling Methods 0.000 claims abstract description 43
- 229910003460 diamond Inorganic materials 0.000 claims abstract description 19
- 239000010432 diamond Substances 0.000 claims abstract description 19
- 230000036346 tooth eruption Effects 0.000 claims abstract description 9
- 238000000034 method Methods 0.000 description 20
- 239000000463 material Substances 0.000 description 6
- 238000010079 rubber tapping Methods 0.000 description 6
- 239000011159 matrix material Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000004904 shortening Methods 0.000 description 2
- 238000005245 sintering Methods 0.000 description 2
- 238000005476 soldering Methods 0.000 description 2
- 238000011144 upstream manufacturing Methods 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 1
- 210000004283 incisor Anatomy 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Images
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
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B10/00—Drill bits
- E21B10/46—Drill bits characterised by wear resisting parts, e.g. diamond inserts
- E21B10/48—Drill bits characterised by wear resisting parts, e.g. diamond inserts the bit being of core type
Definitions
- the invention relates to a hollow drill with a metallic, hollow cylindrical carrier body which has an open end on the drilling direction side with supporting segments for cutting teeth made of diamond grain arranged at a distance from one another in the circumferential direction.
- Hollow drills are known for producing bores in rock, concrete and the like materials, which have a cylindrical support body with supporting segments for cutting teeth made of diamond grain.
- the support segments of these known hollow drills consist of a matrix in which the diamond grains are embedded.
- the free end face of these support segments is each designed as a plane plane running normal to the longitudinal axis of the hollow drill.
- the supporting segments are produced by sintering, which means that there are no free-standing diamond grains on the surface.
- the support segments produced in this way are therefore due to the lack of free-standing diamond grains neither suitable for the tapping process nor for the actual drilling process.
- the invention has for its object to provide a hollow drill of the type mentioned, the support segments are economically producible and also ensure a perfect drilling process, which is particularly feasible without separate aids, such as additional holding by the operator.
- the object is achieved in that the end region of the support segments on the drilling direction tapers at least over part of their length in the drilling direction and the free end face forms a line running in the circumferential direction along at least part of the tapered end region of the support segments.
- the support segments with a tapered end area according to the invention are also preferably produced by sintering, this production also having the result that no diamond grains acting as cutting teeth are exposed on the surface.
- the tapered end area of new support segments manufactured in this way comes into contact with the drilling material during the first tapping process, a part of the matrix is removed very quickly due to the extraordinarily high specific stress in the area of the free linear end face, so that a small number of diamond grains are removed in that area be exposed. Since these exposed diamond grains lie essentially on a line extending in the circumferential direction, they create a guideway immediately after hitting the drilling material. This guideway prevents the hollow drill bit from moving to the side and increases continuously as the drilling process continues.
- the entire surface of the supporting segments gradually comes into contact with the drill material, so that diamond grains are continuously exposed in those areas by removing the matrix.
- the large number of exposed diamond grains can no longer lead to lateral evasion of the hollow drill thanks to the already existing sufficient guidance.
- the tapered region of the support segments has fulfilled its task if a sufficient guideway for the hollow drill, which prevents lateral deflection, is created.
- the design of the support segments is therefore advantageously carried out in such a way that the tapered area is degraded when the remaining surface of the support segments has reached a condition suitable for the further drilling process. With such drilled support segments you can then without partial appearances, both tapping and actual drilling operations are carried out.
- the tapering end region of the support segments advantageously has one or more radially inclined side surfaces.
- the side surfaces inclined in this way can extend over the entire length or only over part of the length of the support segments. It is also possible to combine these radially inclined side surfaces with one or more boundary surfaces inclined in the circumferential direction.
- Such side surfaces inclined in the circumferential direction which lead to a shortening of the line running in the circumferential direction, can be arranged upstream, downstream or also arranged on both sides in the direction of rotation of the hollow drill.
- the speed of removal of the tapered end area can be influenced both by the dimensioning in terms of size and by the formal design.
- the tapered end region of the support segments preferably has radially rectilinear side surfaces.
- the tapering end region is preferably formed by an inclined side surface.
- the side surface which is expediently inclined at an angle of 50 ° -80 °, preferably 70 °, to the drill axis can either extend towards the peripheral edge of the support segment in the drilling direction or decrease in the drilling direction.
- the end region of the support segments on the drilling direction side is formed by two inclined side surfaces.
- This embodiment ensures a favorable load due to the symmetrical design, since the krj te attack centrally. This occurs especially with side surfaces that are preferably inclined at the same angle.
- Such tra segments lead to advantages in terms of strength and additionally result in a favorable load on, for example made by a soldering process connection to the hollow cylindrical support body of the hollow drill.
- the angle enclosed between the two side surfaces can be between 60 ° and 120 ° and preferably 90 °. This inclination of the side surfaces on the one hand fulfills the strength requirements for the support segments and on the other hand ensures that a sufficient number of diamond grains is uncovered quickly enough for drilling during the first contact between the support segments and the drilling material.
- the improvement in the drilling behavior is achieved by the end face of the hollow drill, which is at least partially designed as a line.
- the invention relates in particular to the further development of these supporting segments.
- a taper of such supports can also be formed by one or more radially inclined side surfaces, wherein such side surfaces preferably also run in a straight line and can have the aforementioned angular mass.
- FIG. 1 shows a hollow drill designated 1 overall. This consists of a hollow cylindrical carrier body 2 with a drive shaft 3 protruding counter to the drilling direction. Cutting teeth 6 formed by diamond grain are embedded in these.
- the end region of the support segments 5 on the drilling direction side is tapered in the drilling direction, with two side surfaces 7 running at an angle symmetry relative to one another forming an angle ⁇ of 90 °.
- the intersection of the side surfaces 7 forms a line 8 running in the circumferential direction, along which incisors 6 are exposed during the drilling process.
- the support segments 5 are form-fitting on the support body 2 and fixed, for example, by soldering.
- the cutting teeth 6 or 14 lying on the line 8 or 13 first create a guide groove which prevents the hollow drill 1 from evading radially from the start.
- Two radially inclined side surfaces 22 form a circumferential line 23 along their intersection.
- the tapered end region of the support segments 21 also has a circumferentially inclined boundary surface 24 on, which can be upstream or downstream of the direction of rotation of the hollow drill.
- Cutting teeth 25 in the form of diamond grain are also embedded in the supporting segment 21.
- FIG. 6 shows a support segment, designated overall by 31, which is arranged on a support body 2 and has two radially inclined side surfaces 32.
- the radius r of the line 33 formed by the intersection of the side surfaces falls below the average radius R of the carrier body 2, the support segment 31 being arranged in such a way that the maximum dimension of the radius difference is at the segment ends.
- boundary surfaces 34 are provided in order to avoid the radius difference which has a disadvantageous effect on the creation of a guide groove. These boundary surfaces 34 lead to a shortening of the line 33. The radius difference has thus been reduced in such a way that it can no longer have a disadvantageous effect when the guide groove is created.
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mechanical Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Fluid Mechanics (AREA)
- Physics & Mathematics (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Processing Of Stones Or Stones Resemblance Materials (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Disintegrating Or Milling (AREA)
- Transition And Organic Metals Composition Catalysts For Addition Polymerization (AREA)
- Drilling Tools (AREA)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AT85810026T ATE34329T1 (de) | 1984-03-05 | 1985-01-25 | Hohlbohrer. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19843408092 DE3408092A1 (de) | 1984-03-05 | 1984-03-05 | Hohlbohrer |
DE3408092 | 1984-03-05 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0156762A1 true EP0156762A1 (fr) | 1985-10-02 |
EP0156762B1 EP0156762B1 (fr) | 1988-05-18 |
Family
ID=6229642
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP85810026A Expired EP0156762B1 (fr) | 1984-03-05 | 1985-01-25 | Foret à couronne |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP0156762B1 (fr) |
AT (1) | ATE34329T1 (fr) |
DE (2) | DE3408092A1 (fr) |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0221548A2 (fr) * | 1985-11-05 | 1987-05-13 | Disco Abrasive Systems, Ltd. | Outil de découpage pourvu de couches abrasives intérieures et extérieures disposées concentriquement et son procédé de fabrication |
DE8715431U1 (de) * | 1986-12-10 | 1988-04-07 | Fa. Herbert Happe, 5600 Wuppertal | Bohrvorrichtung zum Ausschneiden von Ringschlitzen |
EP0583629A1 (fr) * | 1992-08-10 | 1994-02-23 | Bauer Spezialtiefbau GmbH | Couronne de forage avec des éléments dentés répartis sur la périphérie et disposés de façon amovible |
EP0857552A2 (fr) * | 1997-01-27 | 1998-08-12 | Tyrolit Schleifmittelwerke Swarovski KG | Elément pour couper de la pierre ayant une résistance accrue à l'usure |
EP0985505A2 (fr) * | 1998-09-10 | 2000-03-15 | Atock Co., Ltd. | Lame de scie circulaire, lame de scie annulaire à tranchant interne et machine utilisant ces outils |
GB2423536A (en) * | 2005-02-24 | 2006-08-30 | Marcrist Internat Ltd | Diamond core drill |
GB2423540A (en) * | 2005-02-24 | 2006-08-30 | Marcrist Internat Ltd | Core drills and cutting discs |
GB2423538A (en) * | 2005-02-24 | 2006-08-30 | Marcrist Internat Ltd | Core drilling segments with side protection |
RU168413U1 (ru) * | 2016-05-18 | 2017-02-02 | Акционерная Компания "АЛРОСА" (публичное акционерное общество) (АК "АЛРОСА" (ПАО)) | Буровая коронка |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3603499A1 (de) * | 1985-05-07 | 1986-11-13 | Geißler & Kuper GmbH Diamantwerkzeug - Wiederaufbereitung, 3100 Celle | Diamantbohrkrone mit schaftrohr und rohrgewindeanschluss |
DE3533929A1 (de) * | 1985-05-07 | 1986-11-13 | Geißler & Kuper GmbH Diamantwerkzeug - Wiederaufbereitung, 3100 Celle | Diamantbohrkrone mit schaftrohr und rohrgewindeanschluss |
DE3706641A1 (de) * | 1987-03-02 | 1988-09-15 | Hilti Ag | Hohlbohrer |
DE8805449U1 (de) * | 1988-04-25 | 1988-06-09 | Maier, Wolfgang, 5630 Remscheid | Diamant-Kernbohrer |
DE19650480A1 (de) * | 1996-12-05 | 1998-06-10 | Ofra Struhalla | Diamant-Werkzeug |
DE202004010916U1 (de) * | 2004-07-12 | 2005-11-24 | Diewe Diamantwerkzeuge Gmbh | Bohrkrone und Bohrkronensegment |
CN114183079A (zh) * | 2021-11-15 | 2022-03-15 | 河南黄河旋风股份有限公司 | 具备加水排渣功能的钻筒 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2404029A1 (de) * | 1974-01-29 | 1975-08-07 | Krupp Ag Huettenwerke | Verfahren zum kern- oder vollbohren und bohrkopf, insbesondere zur durchfuehrung des verfahrens |
DE2026855B2 (de) * | 1969-06-05 | 1976-07-01 | Hougen, Everett Douglas, Flint, Mich. (V.St.A.) | Werkzeug zum ausschneiden von scheiben |
US4267814A (en) * | 1979-12-06 | 1981-05-19 | Federal-Mogul Corporation | Abrasive saw blade for trapezoidal grooving |
AT373196B (de) * | 1980-11-11 | 1983-12-27 | Swarovski Tyrolit Schleif | Hohlbohrer |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1583845A1 (de) * | 1968-02-19 | 1970-09-24 | Zentrales Reparatur Und Ausrue | Bohrkrone fuer Tief-,Schuerf-,Untersuchungs- und anderweitige Bohrungen |
US3537538A (en) * | 1969-05-21 | 1970-11-03 | Christensen Diamond Prod Co | Impregnated diamond bit |
BE874985A (fr) * | 1979-03-21 | 1979-07-16 | Diamant Boart Sa | Couronne de sondage |
-
1984
- 1984-03-05 DE DE19843408092 patent/DE3408092A1/de not_active Withdrawn
-
1985
- 1985-01-25 AT AT85810026T patent/ATE34329T1/de not_active IP Right Cessation
- 1985-01-25 DE DE8585810026T patent/DE3562725D1/de not_active Expired
- 1985-01-25 EP EP85810026A patent/EP0156762B1/fr not_active Expired
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2026855B2 (de) * | 1969-06-05 | 1976-07-01 | Hougen, Everett Douglas, Flint, Mich. (V.St.A.) | Werkzeug zum ausschneiden von scheiben |
DE2404029A1 (de) * | 1974-01-29 | 1975-08-07 | Krupp Ag Huettenwerke | Verfahren zum kern- oder vollbohren und bohrkopf, insbesondere zur durchfuehrung des verfahrens |
US4267814A (en) * | 1979-12-06 | 1981-05-19 | Federal-Mogul Corporation | Abrasive saw blade for trapezoidal grooving |
AT373196B (de) * | 1980-11-11 | 1983-12-27 | Swarovski Tyrolit Schleif | Hohlbohrer |
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0221548A2 (fr) * | 1985-11-05 | 1987-05-13 | Disco Abrasive Systems, Ltd. | Outil de découpage pourvu de couches abrasives intérieures et extérieures disposées concentriquement et son procédé de fabrication |
EP0221548A3 (en) * | 1985-11-05 | 1988-12-21 | Disco Abrasive Systems, Ltd. | Cutting tool having concentrically arranged outside and inside abrasive grain layers and method for production thereof |
DE8715431U1 (de) * | 1986-12-10 | 1988-04-07 | Fa. Herbert Happe, 5600 Wuppertal | Bohrvorrichtung zum Ausschneiden von Ringschlitzen |
EP0583629A1 (fr) * | 1992-08-10 | 1994-02-23 | Bauer Spezialtiefbau GmbH | Couronne de forage avec des éléments dentés répartis sur la périphérie et disposés de façon amovible |
EP0857552A2 (fr) * | 1997-01-27 | 1998-08-12 | Tyrolit Schleifmittelwerke Swarovski KG | Elément pour couper de la pierre ayant une résistance accrue à l'usure |
EP0857552A3 (fr) * | 1997-01-27 | 2000-02-09 | Tyrolit Schleifmittelwerke Swarovski KG | Elément pour couper de la pierre ayant une résistance accrue à l'usure |
EP0985505A2 (fr) * | 1998-09-10 | 2000-03-15 | Atock Co., Ltd. | Lame de scie circulaire, lame de scie annulaire à tranchant interne et machine utilisant ces outils |
EP0985505A3 (fr) * | 1998-09-10 | 2003-12-10 | Atock Co., Ltd. | Lame de scie circulaire, lame de scie annulaire à tranchant interne et machine utilisant ces outils |
EP1681151A2 (fr) * | 1998-09-10 | 2006-07-19 | Atock Co., Ltd. | Outil de carottage et machines utilisant un tel outil |
EP1681151A3 (fr) * | 1998-09-10 | 2006-07-26 | Atock Co., Ltd. | Outil de carottage et machines utilisant un tel outil |
GB2423536A (en) * | 2005-02-24 | 2006-08-30 | Marcrist Internat Ltd | Diamond core drill |
GB2423540A (en) * | 2005-02-24 | 2006-08-30 | Marcrist Internat Ltd | Core drills and cutting discs |
GB2423538A (en) * | 2005-02-24 | 2006-08-30 | Marcrist Internat Ltd | Core drilling segments with side protection |
GB2423537A (en) * | 2005-02-24 | 2006-08-30 | Marcrist Internat Ltd | Core drills |
RU168413U1 (ru) * | 2016-05-18 | 2017-02-02 | Акционерная Компания "АЛРОСА" (публичное акционерное общество) (АК "АЛРОСА" (ПАО)) | Буровая коронка |
Also Published As
Publication number | Publication date |
---|---|
EP0156762B1 (fr) | 1988-05-18 |
DE3408092A1 (de) | 1985-09-19 |
DE3562725D1 (en) | 1988-06-23 |
ATE34329T1 (de) | 1988-06-15 |
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Legal Events
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