EP1982787B1 - Bande de segment pour une couronne de fleuret et couronne de fleuret - Google Patents

Bande de segment pour une couronne de fleuret et couronne de fleuret Download PDF

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Publication number
EP1982787B1
EP1982787B1 EP08154483A EP08154483A EP1982787B1 EP 1982787 B1 EP1982787 B1 EP 1982787B1 EP 08154483 A EP08154483 A EP 08154483A EP 08154483 A EP08154483 A EP 08154483A EP 1982787 B1 EP1982787 B1 EP 1982787B1
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EP
European Patent Office
Prior art keywords
band
cutting segments
segment
drill bit
sintering
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.)
Not-in-force
Application number
EP08154483A
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German (de)
English (en)
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EP1982787A1 (fr
Inventor
Werner Pohl
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.)
Atlas Diamant Werkzeuge GmbH
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Atlas Diamant Werkzeuge GmbH
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Publication date
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Publication of EP1982787A1 publication Critical patent/EP1982787A1/fr
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Publication of EP1982787B1 publication Critical patent/EP1982787B1/fr
Not-in-force 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
    • 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

Definitions

  • the present invention relates to a segment band for a drill bit and a drill bit provided with such a segment band.
  • the invention further relates to a method for producing the segment tape and to a method for producing the drill bit.
  • Core bits are generally used to create core holes and have a carrier sleeve serving as a drill sleeve, which is provided at one end with a connector and at the other end with cutting segments.
  • the fitting is for connection to a drill drive, which may be, for example, a portable drill or a fixed drill stand.
  • the arranged on the front side of the support body cutting segments are usually made of a hard metal, are embedded in the diamond particles to have the required for drilling in, for example, concrete, masonry, asphalt or stone hardness.
  • the cutting segments are made by sintering and then distributed along the circumference of the end face of the carrier body and fixed by soldering.
  • Such a drill bit is from the DE 20 2004 010 916 U1 known.
  • WO 2005/011917 A1 a drill bit, referred to as a cutting tool, which is provided with cutting segments which are inserted into recesses provided on the end face of the carrier body.
  • the cutting segments are in this way additionally positively connected to the carrier body and can for this reason in the axial direction of the drill bit have a comparatively large amount, which allows a longer life.
  • the known drill bits are associated with the disadvantage that the cutting segments are fastened individually to the carrier body.
  • the cutting segments must be fixed in particular in the desired position on the front side of the carrier body and soldered individually.
  • the production of the drill bit is therefore associated with a high cost.
  • the EP 1 652 643 A1 a method for producing a drill bit, in which the cutting segments are attached to a band, the band is then deflected to the required length and joined together into a ring and finally the ring is fixed by soldering or welding to the front side of the carrier body.
  • the belt is provided with slots into which the cutting segments are inserted so as to be supported on three sides by the belt. Subsequently, the cutting segments are connected by soldering or welding to the belt.
  • the drill bit comprises one or more diamond segments, which are mounted on the end face of a connecting ring.
  • the connecting ring is welded to the end of a tubular carrier.
  • the diamond segments can be connected by laser welding, brazing, soldering or sintering with the end face of the connecting ring.
  • a method and an apparatus for producing saw blades is disclosed in US 5,448,866 US 6,562,288 B2 described.
  • the method provides first to mix metal powder with diamond particles and then introduce a master sheet into a device so that a sawtooth can be attached to the end face of the stem. Subsequently, the metal powder with the diamond particles is pressed into a sawtooth and sintered. At the same time the sawtooth is welded to the stem leaf.
  • the reveal JP 02274418 A and JP 02274416 A a method of making a band saw.
  • the method provides to insert rectangular cutting segments in U-shaped slots of a band-shaped saw blade and to connect them cohesively with the band saw blade.
  • the invention has for its object to provide a segment band and provided with such a segment band drill bit, which can be easily and inexpensively manufactured and allow a long service life.
  • the method according to the invention for producing a segment band for a drill bit is characterized in that a band consisting of metal is inserted into a sintering tool, then a green compact formed from a sinter powder is placed in the sintering tool on the top and bottom of the band and then the Green compacts are sintered to form a cutting segment.
  • the green compacts are joined together to form the cutting segment together.
  • the green compacts and the band are connected to each other, so that a firm bond of cutting segment and band results, which contributes to a long service life.
  • a plurality of green bodies are disposed on the top and bottom of the belt to form a plurality of spaced apart cutting segments in the sintering tool. Even if the segment band should have a large number of cutting segments, the method according to the invention ensures simple and cost-effective production. Because in contrast to the prior art according to the EP 1 652 643 A1 in that the cutting segments are individually connected to the belt after sintering, the attachment of the cutting segments to the belt takes place during sintering of the cutting segments, so that the effort required to secure the cutting segments to the belt is independent of the number of cutting segments ,
  • the band is provided with at least one opening.
  • the opening is advantageously made by punching or cutting.
  • the band is in one piece and consequently extends through the cutting segments.
  • the band may be multi-part and therefore composed of individual members.
  • the links are spaced apart in the sintering tool so that there is an opening between the links.
  • the green bodies are arranged so that the green bodies overlap the edge of the limbs a bit. In this way, during sintering, the green bodies are connected to one another and to the other the green bodies are connected to the limbs.
  • the sintering powder is preferably a metal powder mixed with diamond particles in order to ensure a high hardness of the cutting segments.
  • the segment band according to the invention has a plurality of cutting segments and a band connecting the cutting segments to each other.
  • the cutting segments are spaced apart in the direction of the length of the strip. Conveniently, the cutting segments are arranged equidistantly.
  • the cutting segments and the band are connected to one another by sintering, so that the segment band benefits from the method according to the invention.
  • the band is provided with a plurality of openings.
  • the openings are advantageously arranged between the cutting segments and preferably have a closed, in particular circular or oval, shape.
  • the openings on the one hand contribute to a high flexibility of the band, which makes it possible to adapt the segment tape to the carrier body of a drill bit.
  • the openings on the other hand, ensure that the cutting segments are flushed during drilling with a lubricant or coolant, such as water.
  • a lubricant or coolant such as water.
  • the closed shape of the openings is usually destroyed by the abrasive erosion occurring during drilling. Until then, however, the closed shape of the apertures ensures that the cutting segments are interconnected by the tape.
  • the openings may be arranged in the region of the cutting segments in order to ensure a connection of the green bodies with one another during sintering.
  • the openings have in this case expediently an open, in particular substantially semicircular, shape, which ensures an unhindered distribution of the sintering powder.
  • the cutting segments are arranged such that the height of the cutting segments extends in the direction of the width of the band.
  • the segment band is in this case the in the WO 2005/011917 A1 described advantage of a long service life.
  • the height of the cutting segments is greater than the width of the belt so that a portion of the cutting segments projects beyond the belt.
  • This projection can engage in the attachment of the segment band to a drill bit in recesses of the carrier body of the drill bit to achieve an additional positive connection between the segment band and the carrier body.
  • the height of the cutting segments is smaller than the width of the band.
  • the band forms in this way a contact surface, which contributes to a simple attachment of the segment band to the support body of a drill bit.
  • the thickness of the cutting segments is greater than the thickness of the band.
  • the band may have a thickness of about 0.3 mm to 0.6 mm, whereas the thickness of the cutting segments may be greater by a factor of 10, for example between about 3.0 mm and 6.0 mm.
  • the band advantageously extends approximately centrically with respect to the thickness of the cutting segments. Depending on the application, however, it may be expedient that the band extends eccentrically with respect to the thickness of the cutting segments. The eccentricity is suitably between about 20% and 30% of the thickness of the cutting segment.
  • the drill bit according to the invention has a tubular carrier body and the segment band according to the invention.
  • the segment band is attached in the region of the end face of the carrier body at this.
  • the segment band is expediently connected to the carrier body by soldering or welding.
  • the drill bit of the carrier body is provided in the region of the end face with a plurality of recesses.
  • the cutting segments of the segment band are used, so that there is a positive connection between the carrier body and the segment band.
  • the recesses advantageously have a depth extending in the axial direction of the carrier body, which is less than half, preferably less than one third, of the height of the cutting segments.
  • the carrier body in the region of the end face has a wall thickness which is smaller than the thickness of the cutting segments. In this way, the cutting segments protrude in the radial direction, depending on the application, inwardly and / or outwardly from the carrier body and thus allow a high propulsion speed.
  • the support body is provided at the end remote from the end end with a connection piece to secure the drill bit to a machine or a drill stand.
  • the inventive method for producing a drill bit is characterized in that the segment strip according to the invention bent according to the radius of curvature of the support body and attached in the region of the end along the circumference of the support body, in particular soldered or welded, is.
  • a plurality of segment bands are arranged one behind the other in the circumferential direction of the carrier body. Such a procedure is particularly suitable for carrier bodies with a large diameter.
  • the cutting segments of the segment band are used in existing in the region of the front side recesses of the carrier body in order to achieve a positive connection between the segment band and the carrier body.
  • the cutting segments can be introduced into the interior of the carrier body and inserted from the inside into the recesses. Depending on the application, however, it is possible to insert the cutting segments from the outside or in the axial direction from above into the recesses.
  • the contact surface can be applied both to the inner peripheral surface and to the outer peripheral surface of the carrier body.
  • the voltage applied to the peripheral surface bearing surface of the segment band can be additionally or alternatively connected to the cutting segments with the carrier body.
  • a tubular support body 10 which consists of metal and has an end face 11.
  • the carrier body 10 is provided in the region of the end face 11 with a plurality of recesses 12.
  • the carrier body 10 has a connection piece 13, which serves to connect the drill bit with a drill or a drill stand.
  • a segment band 20 is further attached in the region of the end face 11, which is connected by soldering or welding to the carrier body 10.
  • the segment band 20 further comprises a one-piece, consisting of metal band 30, which has a extending in the circumferential direction of the support body 10 length 33, extending in the axial direction of the support body 10 width 34 and in the radial direction of the support body 10th has extending thickness 35.
  • the band 30 connects the cutting segments 21 with each other, which are arranged in the circumferential direction of the carrier body 10 and thus in the direction of the length 33 of the band 30 at a distance a from each other.
  • the arrangement of the cutting segments 21 is equidistant.
  • the band 30 is provided with a plurality of openings 36, 38, in particular Fig. 3 to recognize.
  • the openings 36 have a closed, circular shape and are arranged between the cutting segments 21, in particular Fig. 2a to recognize.
  • the openings 38 are arranged in the region of the cutting segments 21 and have an open, substantially semicircular shape, as also Fig. 2a to recognize.
  • the cutting segments 21 are arranged so that the height 22 of the cutting segments 21 extends in the direction of the width 34 of the band 30.
  • the height 22 of the cutting segments 21 is greater than the width 34 of the band 30, so that a supernatant results, which makes up approximately one fifth of the height 22.
  • the recesses 12 have a depth extending in the axial direction of the carrier body 10, which corresponds to the size of the supernatant and thus is approximately one fifth of the height 22 of the cutting segments 21.
  • the thickness 24 of the cutting segments 21 is greater than the thickness 35 of the belt 30.
  • the ratio of the thickness 24 of the cutting segments 21 to the thickness 35 of the belt 30 is approximately 10: 1.
  • the band 30 extends approximately centrally with respect to the thickness 24 of the cutting segments 21.
  • Fig. 4 shown drill bit differs from the drill bit according to Fig. 1 in the embodiment of the segment band 20.
  • the Fig. 5a and 5b indicate the segment tape 20 a plurality of equidistantly arranged cutting segments 21 having a height 22 which is smaller than the width 34 of the cutting segments 21 interconnecting belt 30.
  • the band 30 forms a contact surface, the , as Fig. 4 can be seen, abuts the outer peripheral surface of the carrier body 10, depending on the application, however, can also be arranged on the inner peripheral surface of the carrier body 10.
  • the band 30 is provided between the cutting segments 21 with openings 37 which have a closed, oval shape.
  • the band 30 is provided in the region of the cutting segments 21 with openings 39, 40.
  • the openings 39 have an open, substantially semicircular shape, whereas the extending into the contact surface openings 40 have a closed, oval shape.
  • the openings 40 go into openings 41, which are greater in the direction of the length 33 of the band 30 than the openings 40 and the opening formed by the openings 40, 41 recess overall give an open shape.
  • segment band 20 differs from the segment band 20 according to the Fig. 2a and 2b moreover, that the band 30 extends eccentrically with respect to the thickness 24 of the cutting segments 21.
  • the eccentricity is about 25% of the thickness 24 of the cutting segments 21st
  • the different embodiments of the segment band 20 have in common that the cutting segments 21 and the band 30 are interconnected by sintering.
  • the band 30, which, like the Fig. 2b and 5b to identify, has a top 31 and a bottom 32, inserted into a sintering tool. Thereafter, a plurality of green compacts formed of diamond powder sintered powder are placed on the upper side 31 and the lower side 32 in the sintering tool.
  • the green compacts are arranged both on the upper side 31 and on the lower side 32 of the band 30 in the region of the openings 38, 39, 40, 41, so that the green compacts pass through the openings 38, 39, 40, 41 during the subsequent sintering connect and each one green compact on the top 31 together with an associated green on the bottom 32 form a cutting segment 21.
  • sintering creates a strong bond between the generated cutting segments 21 and the strip 30.
  • the band 30 after being sintered extends centrically with respect to the thickness 24 of the cutting segments 21, as in FIG Fig. 2b shown. If, on the upper side 31 and the underside 32 of the band 30, green bodies of different thickness are arranged, then an eccentric course of the band 30 with respect to the thickness 24 of the cutting segments 21 results, as in FIG Fig. 5b can be seen.
  • the drill bit shown is produced by bending the prefabricated segment band 20 in accordance with the radius of curvature of the carrier body 10 and fastening it in the area of the end face 11 along the circumference to the carrier body 10 by soldering or welding.
  • a plurality of segment belts 20 can be arranged one behind the other in the circumferential direction of the carrier body 10.
  • the protrusion formed by the cutting segments 21 engages in the recesses 12 when attaching the segment band 20 to the carrier body 10, thus ensuring an additional form fit between the segment band 20 and the carrier body 10.
  • the drill bit shown is produced in the same way. Due to the contact surface formed by the band 30, which has the segment band 20 in this case, there is the possibility, in addition to solder or weld the contact surface to the support body 10 to ensure a secure attachment of the segment belt 20 to the support body 10. As in Fig. 4 can be seen, the contact surface is located on the outer peripheral surface of the support body 10 and thus covers the recesses 12. The support body 10 has in the region of the end face 11 a Wall thickness that is less than the thickness 24 of the cutting segments 21. Due to the in Fig.
  • the cutting segments 21 extend in the radial direction of the support body 10 in a sufficient degree in the recess 12 and depending on the application, even from the inner peripheral surface of the support body 10th protrude.
  • the above-described embodiments of the segment belt 20 and the drill bit are characterized by a simple and inexpensive production. Moreover, the production of the segmental tape 20 ensures a firm bond between the cutting segments 21 and band 30. The production of the drill bit based on the prefabrication of the segmental tape 20 enables flexible production, which also requires a small number of molds and dies, and thus over conventional production methods is particularly inexpensive. Last but not least, the alignment of the height 22 of the cutting segments 21 in the direction of the width 34 of the strip 30 contributes to a long service life and high feed rate.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Mining & Mineral Resources (AREA)
  • Drilling Tools (AREA)
  • Processing Of Stones Or Stones Resemblance Materials (AREA)
  • Polishing Bodies And Polishing Tools (AREA)

Claims (29)

  1. Procédé pour réaliser une bande segmentée (20) pour un trépan de forage, comprenant les étapes de procédé suivantes:
    a) une bande en métal (30), qui possède un côté supérieur (31) et un côté inférieur (32), est mise en place dans un outil de frittage;
    b) au moins une ébauche crue formée à partir d'une poudre frittée est agencée sur le côté supérieur (31) de la bande (30) dans l'outil de frittage;
    c) au moins une ébauche crue formée à partir d'une poudre frittée est agencée sur le côté inférieur (32) de la bande (30) dans l'outil de frittage;
    d) les ébauches crues sont frittées pour former un segment de tranchant (21);
    e) de sorte que grâce au frittage, le segment de tranchant (21) et la bande (30) sont reliés l'un à l'autre.
  2. Procédé selon la revendication 1, caractérisé en ce qu'une pluralité d'ébauches crues sont agencées sur le côté supérieur (31) et sur le côté inférieur (32) de la bande (30) pour former une pluralité de segments de tranchants (21) agencés à distance (a) les uns des autres dans l'outil de frittage.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que la bande (30) est pourvue d'au moins une ouverture (36, 37, 38, 39, 40, 41).
  4. Procédé selon l'une des revendications 1 à 3, caractérisé par une bande en une seule pièce (30).
  5. Procédé selon la revendication 3, caractérisé par une bande en plusieurs pièces (30), qui se compose de maillons individuels, les maillons étant agencés à distance les uns des autres dans l'outil de frittage pour former l'ouverture (38, 39, 40, 41).
  6. Procédé selon l'une des revendications 3 à 5, caractérisé en ce que les ébauches crues sont agencées sur le côté supérieur (31) et sur le côté inférieur (32) de la bande (30) dans la région de l'ouverture (38, 39,40,41).
  7. Procédé selon l'une des revendications 1 à 6, caractérisé en ce que la poudre frittée est une poudre métallique mélangée avec des particules de diamant.
  8. Bande segmentée pour un trépan de forage, comprenant
    une pluralité de segments de tranchants (21) qui possèdent une hauteur (22), une largeur (23) et une épaisseur (24), et
    une bande (30) qui possède une longueur (33), une largeur (34) et une épaisseur (35) et qui relie les segments de tranchants les uns avec les autres;
    dans laquelle les segments de tranchants (21) sont agencés à distance (a) les uns des autres en direction de la longueur (33) de la bande (30); et
    dans laquelle les segments de tranchants (21) sont frittés à partir d'ébauches crues qui sont reliées pendant le frittage avec la bande (30) conformément au procédé selon l'une des revendications 1 à 7.
  9. Bande segmentée selon la revendication 8, caractérisée en ce que la bande (30) est pourvue d'une pluralité d'ouvertures (36, 37, 38, 39, 40, 41).
  10. Bande segmentée selon la revendication 9, caractérisée par des ouvertures (36, 37) qui sont agencées entre les segments de tranchants (21), dans laquelle les ouvertures (36, 37) ont de préférence une forme fermée, en particulier circulaire ou ovale.
  11. Bande segmentée selon la revendication 9 ou 10, caractérisée par des ouvertures (38, 39, 40, 41), qui sont agencées dans la région des segments de tranchants (21), dans laquelle les ouvertures (38, 39, 40, 41) ont de préférence une forme ouverte, en particulier une forme sensiblement en demi-cercle.
  12. Bande segmentée selon l'une des revendications 8 à 11, caractérisée en ce que les segments de tranchant (21) sont agencés de telle façon que la hauteur (22) des segments de tranchants (21) s'étend dans la direction de la largeur (34) de la bande (30).
  13. Bande segmentée selon la revendication 12, caractérisée en ce que la hauteur (22) des segments de tranchants (21) est supérieure à la largeur (34) de la bande (30).
  14. Bande segmentée selon la revendication 12, caractérisée en ce que la hauteur (22) des segments de tranchants (21) est inférieure à la largeur (34) de la bande (30).
  15. Bande segmentée selon l'une des revendications 8 à 14, caractérisée en ce que l'épaisseur (24) des segments de tranchants (21) est supérieure à l'épaisseur (35) de la bande (30).
  16. Bande segmentée selon la revendication 15, caractérisée en ce que la bande (30) s'étend approximativement au centre par référence à l'épaisseur (24) des segments de tranchants (21).
  17. Bande segmentée selon la revendication 15, caractérisée en ce que la ande (30) s'étend de manière excentrique par référence à l'épaisseur (24) des segments de tranchants (21).
  18. Trépan de forage comprenant
    un corps porteur (10) de forme tubulaire qui possède un côté frontal (11), et
    au moins une bande segmentée (20) selon l'une des revendications 8 à 17;
    dans lequel la bande segmentée (20) est fixée sur le corps porteur (10) dans la région du côté frontal (11).
  19. Trépan de forage selon la revendication 18, caractérisée en ce que la bande segmentée (20) est reliée au corps porteur (10) par brasage ou par soudure.
  20. Trépan de forage selon la revendication 18 ou 19, caractérisé en ce que le corps porteur (10) est pourvu, dans la région du côté frontal (11), d'une pluralité d'échancrures (12) dans lesquelles les segments de tranchants (21) de la bande segmentée (20) sont mis en place.
  21. Trépan de forage selon la revendication 20, caractérisé en ce que les échancrures (12) possèdent une profondeur, s'étendant dans la direction axiale du corps porteur (10), qui est inférieure à la moitié, et de préférence inférieure à un tiers, de la hauteur (22) les segments de tranchants (21).
  22. Trépan de forage selon l'une des revendications 18 à 21, caractérisé en ce que le corps porteur (10) possède, dans la région du côté frontal (11), une épaisseur de paroi qui est plus faible que l'épaisseur (24) des segments de tranchants (21).
  23. Trépan de forage selon l'une des revendications 18 à 22, caractérisé en ce que le corps porteur (10) est pourvu d'une pièce de raccordement (13) sur son extrémité détournée du côté frontal (11).
  24. Procédé pour la réalisation d'un trépan de forage selon l'une des revendications 18 à 23, caractérisé en ce qu'au moins une bande segmentée (20) selon l'une des revendications 8 à 17 est cintrée de manière correspondante au rayon de courbure du corps porteur (10), et est fixée dans la région du côté frontal (11) le long de la périphérie sur le corps porteur (10).
  25. Procédé selon la revendication 24, caractérisé par une pluralité de bandes segmentées (20), lesquelles sont agencées les unes derrière les autres en direction périphérique du corps porteur (10).
  26. Procédé selon la revendication 24 ou 25, caractérisé en ce que les segments de tranchants (21) de la bande segmentée (20) sont mis en place dans des échancrures (12) présentes dans la région du côté frontal (11) du corps porteur (10).
  27. Procédé selon la revendication 26, caractérisé en ce que les segments de tranchants (21) sont introduits à l'intérieur du corps porteur (10) et sont mis en place depuis l'intérieur dans les échancrures (12).
  28. Procédé selon la revendication 26, caractérisé en ce que les segments de tranchants (21) sont mis en place depuis l'extérieur dans les échancrures (12).
  29. Procédé selon la revendication 26, caractérisé en ce que les segments de tranchants (21) sont mis en place depuis le haut dans les échancrures (12).
EP08154483A 2007-04-20 2008-04-14 Bande de segment pour une couronne de fleuret et couronne de fleuret Not-in-force EP1982787B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102007018791A DE102007018791B3 (de) 2007-04-20 2007-04-20 Segmentband für eine Bohrkrone und Bohrkrone

Publications (2)

Publication Number Publication Date
EP1982787A1 EP1982787A1 (fr) 2008-10-22
EP1982787B1 true EP1982787B1 (fr) 2009-12-30

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AT (1) ATE453480T1 (fr)
DE (2) DE102007018791B3 (fr)

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CN107905499B (zh) * 2017-11-20 2019-07-30 浙江荣佳建筑工程有限公司 一种建筑施工水泥墙孔洞处理装置

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JPH02274416A (ja) * 1989-04-14 1990-11-08 Sanwa Daiyamondo Kogyo Kk 硬質物切削用帯のこ及びその製造方法
JPH02274418A (ja) * 1989-04-14 1990-11-08 Sanwa Daiyamondo Kogyo Kk 硬質物切削用帯のこの製造方法
DE4436915A1 (de) * 1994-10-15 1996-04-18 Hilti Ag Hohlbohrkrone mit einem hohlzylindrischen Trägerkörper
US5868125A (en) * 1996-11-21 1999-02-09 Norton Company Crenelated abrasive tool
KR100426843B1 (ko) * 2000-11-13 2004-04-13 박인순 절삭톱의 제조방법 및 장치와, 그에 의해 제조된 절삭톱
DE20311567U1 (de) * 2003-07-25 2003-12-04 Wendt Longyear Gmbh Trennschleifwerkzeug zur abtragenden Materialbearbeitung
US20050279533A1 (en) * 2004-06-22 2005-12-22 Vincent Corica Apparatus and method for securing diamond segment to rotating tool
DE202004010916U1 (de) * 2004-07-12 2005-11-24 Diewe Diamantwerkzeuge Gmbh Bohrkrone und Bohrkronensegment
DE102004052125B3 (de) * 2004-10-27 2006-02-16 Steffen Hoffmann-Blecker Verfahren zur Herstellung einer Bohrkrone

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DE502008000277D1 (de) 2010-02-11
EP1982787A1 (fr) 2008-10-22
ATE453480T1 (de) 2010-01-15
DE102007018791B3 (de) 2008-08-14

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