EP0340340B1 - Verfahren zum Herstellen eines Diamant-Kernbohrers - Google Patents

Verfahren zum Herstellen eines Diamant-Kernbohrers Download PDF

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Publication number
EP0340340B1
EP0340340B1 EP88119262A EP88119262A EP0340340B1 EP 0340340 B1 EP0340340 B1 EP 0340340B1 EP 88119262 A EP88119262 A EP 88119262A EP 88119262 A EP88119262 A EP 88119262A EP 0340340 B1 EP0340340 B1 EP 0340340B1
Authority
EP
European Patent Office
Prior art keywords
face
tube
cutting segments
wall
wall thickness
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
EP88119262A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0340340A1 (de
Inventor
Wolfgang Meier
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Priority to AT88119262T priority Critical patent/ATE91749T1/de
Publication of EP0340340A1 publication Critical patent/EP0340340A1/de
Application granted granted Critical
Publication of EP0340340B1 publication Critical patent/EP0340340B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • B23D65/00—Making tools for sawing machines or sawing devices for use in cutting any kind of material
    • 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 method for producing or refitting a diamond core drill in tubular form, the end face of which has a greater wall thickness than the rest of the tube wall, in order to carry cutting segments on the annular end face.
  • Such a diamond core drill in the form of a screw-on crown is known from DE-A-2 850 015.
  • axial incisions are milled into the end face, which are filled by sintered diamond layers with spacing layers in between.
  • This construction requires a high manufacturing effort and the core drill has a large wall thickness, so that a lot of material has to be pierced.
  • the object of the invention is to improve a method for producing or refitting a diamond core drill of the type mentioned in such a way that the drill can be provided with cutting segments very often in a simple and inexpensive manner and is subject to little wear.
  • This object is achieved in that the greater wall thickness in the tube end region is achieved by upsetting in such a way that the end side protrudes from the tube wall both on the inside and on the outside.
  • Such a core drill not only offers sufficient hold for the cutting segments, but it is also ensured that the core drilled out does not drag along the inner wall of the drill and causes considerable wear.
  • the tube on the cutting end face can have a smaller wall thickness than is required for the segments, since after a slight smooth turning or milling the end face, it is swaged up again until it has a sufficient wall thickness for which has cutting segments.
  • the tube can thus have a constant small wall thickness over its entire length and only needs to be swaged up at the cutting end until the width of the end face is large enough for fastening the cutting segments.
  • Wear of the respective cutting segment set uses very little pipe length to get a sufficiently wide end face again.
  • Such a method is relatively inexpensive and labor intensive.
  • the metal is solidified on the cutting end face by the upsetting, so that there is a particularly secure hold.
  • At least one roller runs under pressure on the tube end face until the wall thickness required for the cutting segments is reached. It is also preferably proposed that the existing used cutting segments be removed from the pipe end face as far as possible and that the pipe end face is turned or milled off by a small length for new equipping with cutting segments, and that the pipe end face is then swaged up.
  • the tube 1 of a diamond core drill is thickened 1a at the free cutting end, so that the annular end face 3 has a greater thickness than the rest of the tube wall. Diamond cutting segments 2 are soldered onto this end face 3.
  • this will be Tube end upset by rolling to deform.
  • at least one roller is placed radially to the tube against the end face 3 and pressed onto the end face in a rolling manner, as a result of which the tube material, in particular the steel, is cold-deformed in the region 1a.
  • the axis of the deforming roller is arranged so that it intersects the tube axis 7.
  • the deforming roller can have a cylindrical or a spherical or pointed roller jacket in order to accelerate the deformation.
  • the tube end face only has to be turned or milled by a few millimeters, after which the tube end face is then swaged up.
  • this forms a clearance angle 5 on both the inside and outside diameters 4, 6, so that the end face 3 protrudes from the tube wall both on the inside and on the outside. This ensures that the pipe wall is not exposed to wear in the area that is not or only slightly widened.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Geology (AREA)
  • Life Sciences & Earth Sciences (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)
  • Drilling Tools (AREA)
  • Crystals, And After-Treatments Of Crystals (AREA)
EP88119262A 1988-04-25 1988-11-19 Verfahren zum Herstellen eines Diamant-Kernbohrers Expired - Lifetime EP0340340B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT88119262T ATE91749T1 (de) 1988-04-25 1988-11-19 Verfahren zum herstellen eines diamantkernbohrers.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8805449U DE8805449U1 (de) 1988-04-25 1988-04-25 Diamant-Kernbohrer
DE8805449U 1988-04-25

Publications (2)

Publication Number Publication Date
EP0340340A1 EP0340340A1 (de) 1989-11-08
EP0340340B1 true EP0340340B1 (de) 1993-07-21

Family

ID=6823338

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88119262A Expired - Lifetime EP0340340B1 (de) 1988-04-25 1988-11-19 Verfahren zum Herstellen eines Diamant-Kernbohrers

Country Status (3)

Country Link
EP (1) EP0340340B1 (it)
AT (1) ATE91749T1 (it)
DE (2) DE8805449U1 (it)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4436915A1 (de) * 1994-10-15 1996-04-18 Hilti Ag Hohlbohrkrone mit einem hohlzylindrischen Trägerkörper
BE1013336A3 (nl) * 2000-03-01 2001-12-04 Diamant Boart Nv Buisvormige boor.
DE10041911B4 (de) * 2000-08-25 2009-02-05 Hilti Aktiengesellschaft Diamantbohrkrone
CN109352837B (zh) * 2018-10-25 2021-02-12 江苏锋泰工具有限公司 一种干式tm齿打孔钻

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3802520A (en) * 1972-02-16 1974-04-09 L Whitman Combination masonry diamond bit and metal hole-cutting saw
US3981371A (en) * 1975-06-06 1976-09-21 Jamie Malcolm Wallis Core sampling drill
JPS57127535A (en) * 1981-01-29 1982-08-07 Kobe Steel Ltd Upset forging method
JPS58163542A (ja) * 1982-03-23 1983-09-28 Sumitomo Metal Ind Ltd 管体のアプセツト加工方法

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE199063C (it) *
US1996181A (en) * 1930-11-01 1935-04-02 Justin F Wait Process of forming castings
CH185076A (de) * 1935-05-04 1936-07-15 Sauer Carl Kernbohrer für Mauerwerk.
GB601428A (en) * 1945-06-18 1948-05-05 Wheel Trueing Tool Company Of Improvements in or relating to core bits
US2796777A (en) * 1953-05-06 1957-06-25 Stoll Albert Method and apparatus for resizing tools
US3306380A (en) * 1964-01-27 1967-02-28 Gen Automation Mfg Inc Core drill
GB1583860A (en) * 1976-08-20 1981-02-04 Moppes & Sons Ltd L Van Core drills
CA1053938A (en) * 1977-11-18 1979-05-08 Robert E. Generoux Drill bit
DE3408092A1 (de) * 1984-03-05 1985-09-19 Hilti Ag, Schaan Hohlbohrer
DE3512114A1 (de) * 1985-04-03 1986-10-09 Meissner, Joachim Hohlbohrkrone
JPS63149038A (ja) * 1986-12-15 1988-06-21 Nippon Steel Corp 外アツプセツト・プレスによる鋼管端部の加工方法

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3802520A (en) * 1972-02-16 1974-04-09 L Whitman Combination masonry diamond bit and metal hole-cutting saw
US3981371A (en) * 1975-06-06 1976-09-21 Jamie Malcolm Wallis Core sampling drill
JPS57127535A (en) * 1981-01-29 1982-08-07 Kobe Steel Ltd Upset forging method
JPS58163542A (ja) * 1982-03-23 1983-09-28 Sumitomo Metal Ind Ltd 管体のアプセツト加工方法

Also Published As

Publication number Publication date
DE8805449U1 (de) 1988-06-09
DE3882520D1 (it) 1993-08-26
EP0340340A1 (de) 1989-11-08
ATE91749T1 (de) 1993-08-15

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